10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 10-K

☒	ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE FISCAL YEAR ENDED DECEMBER 31, 2021

or
FOR THE TRANSITION PERIOD FROM ___________ TO __________
COMMISSION FILE NUMBER	001-38629

 

EQUITRANS MIDSTREAM CORPORATION

(Exact name of registrant as specified in its charter)

Pennsylvania	83-0516635
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification No.)

2200 Energy Drive, Canonsburg, Pennsylvania     15317

(Address of principal executive offices)      (Zip code)

Registrant's telephone number, including area code: (724) 271-7600

Securities registered pursuant to Section 12(b) of the Act

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, no par value	ETRN	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:  None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ☒  No  ☐ 

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.     Yes  ☐   No  ☒ 

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes ☒ No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes ☒ No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.  See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer	☒	Accelerated Filer	☐	Emerging Growth Company	☐
Non-Accelerated Filer	☐	Smaller Reporting Company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C.7262(b)) by the registered public accounting firm that prepared or issued its audit report.    ☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ☐  No  ☒

The aggregate market value of common stock held by non-affiliates of the registrant as of June 30, 2021: $3.4 billion

The number of shares of common stock outstanding (in thousands), as of January 31, 2022: 432,676

DOCUMENTS INCORPORATED BY REFERENCE

The Company's definitive proxy statement relating to the 2022 annual meeting of shareholders will be filed with the Securities and Exchange Commission within 120 days after the close of the Company's fiscal year ended December 31, 2021 and is incorporated by reference in Part III to the extent described therein.

EQUITRANS MIDSTREAM CORPORATION

Table of Contents

		Page No.
Glossary of Commonly Used Terms, Abbreviations and Measurements		3
Cautionary Statement		6
PART I
Item 1.	Business	8
Item 1A.	Risk Factors	30
Item 1B.	Unresolved Staff Comments	60
Item 2.	Properties	61
Item 3.	Legal Proceedings	61
Item 4.	Mine Safety Disclosures	65
	Information About Our Executive Officers	65
PART II
Item 5.	Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	66
Item 6.	Reserved	67
Item 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	67
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	82
Item 8.	Financial Statements and Supplementary Data	85
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	138
Item 9A.	Controls and Procedures	138
Item 9B.	Other Information	138
Item 9C.	Disclosure Regarding Foreign Jurisdictions that Prevent Inspections	138
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	139
Item 11.	Executive Compensation	139
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	139
Item 13.	Certain Relationships and Related Transactions and Director Independence	139
Item 14.	Principal Accounting Fees and Services	139
PART IV
Item 15.	Exhibits and Financial Statement Schedules	140
Signatures		148

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EQUITRANS MIDSTREAM CORPORATION

Glossary of Commonly Used Terms, Abbreviations and Measurements

2021 Water Services Agreement – that certain mixed-use water services agreement entered into on October 22, 2021 by the Company and EQT (as defined below), as subsequently amended, which, upon its effectiveness, will replace the Water Services Letter Agreement (as defined below) and certain other existing Pennsylvania water services agreements.

Allowance for Funds Used During Construction (AFUDC) – carrying costs for the construction of certain long-lived regulated assets are capitalized and amortized over the related assets' estimated useful lives. The capitalized amount for construction of regulated assets includes interest cost and a designated cost of equity for financing the construction of these regulated assets.

Appalachian Basin – the area of the United States composed of those portions of West Virginia, Pennsylvania, Ohio, Maryland, Kentucky and Virginia that lie in the Appalachian Mountains.

associated gas – natural gas that is produced as a byproduct of principally oil production activities.

British thermal unit – a measure of the amount of energy required to raise the temperature of one pound of water one-degree Fahrenheit.

Code – the U.S. Internal Revenue Code of 1986, as amended, and the regulations and interpretations promulgated thereunder.

delivery point – the point where gas is delivered into a downstream gathering system or transmission pipeline.

Distribution – the distribution of 80.1% of the then-outstanding shares of common stock, no par value, of Equitrans Midstream Corporation (Equitrans Midstream common stock) to EQT shareholders of record as of the close of business on November 1, 2018.

EQGP – EQGP Holdings, LP and its subsidiaries.

EQM – EQM Midstream Partners, LP and its subsidiaries.

EQT – EQT Corporation (NYSE: EQT) and its subsidiaries.

EQT Global GGA – that certain Gas Gathering and Compression Agreement entered into on February 26, 2020 (the EQT Global GGA Effective Date) by the Company with EQT and certain affiliates of EQT for the provision of certain gas gathering services to EQT in the Marcellus and Utica Shales of Pennsylvania and West Virginia, as subsequently amended.

firm contracts – contracts for gathering, transmission, storage and water services that reserve an agreed upon amount of pipeline or storage capacity regardless of the capacity used by the customer during each month, and generally obligate the customer to pay a fixed, monthly charge.

firm reservation fee revenues – contractually obligated revenues that include fixed monthly charges under firm contracts and fixed volumetric charges under MVC (as defined below) contracts.

gas – natural gas.

liquefied natural gas (LNG) – natural gas that has been cooled to minus 161 degrees Celsius for transportation, typically by ship. The cooling process reduces the volume of natural gas by 600 times.

local distribution company (LDC) – LDCs are companies involved in the delivery of natural gas to consumers within a specific geographic area.

Minimum volume commitments (MVC or MVCs) – contracts for gathering or water services that obligate the customer to pay for a fixed amount of volumes daily, monthly, annually or over the life of the contract.

Mountain Valley Pipeline (MVP) – an estimated 300-mile, 42-inch diameter natural gas interstate pipeline with a targeted capacity of 2.0 Bcf per day that is designed to span from the Company's existing transmission and storage system in Wetzel County, West Virginia to Pittsylvania County, Virginia, providing access to the growing Southeast demand markets.

Mountain Valley Pipeline, LLC (MVP Joint Venture) – a joint venture among the Company and, as applicable, affiliates of each of NextEra Energy, Inc., Consolidated Edison, Inc. (Con Edison), AltaGas Ltd. and RGC Resources, Inc. that is constructing the MVP and the MVP Southgate (as defined below) projects.

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MVP Southgate – a proposed 75-mile interstate pipeline that is contemplated to extend from the MVP at Pittsylvania County, Virginia to new delivery points in Rockingham and Alamance Counties, North Carolina. The project is subject to ongoing discussions between the MVP Joint Venture and the project shipper, Dominion Energy North Carolina, as discussed in "MVP Southgate Project" under "Developments, Market Trends and Competitive Conditions" in "Item 1. Business" of this Annual Report on Form 10-K.

natural gas liquids (NGLs) – those hydrocarbons in natural gas that are separated from the gas as liquids through the process of absorption, condensation, adsorption or other methods in gas processing plants. Natural gas liquids include ethane, propane, butane and iso-butane.

play – a proven geological formation that contains commercial amounts of hydrocarbons.

Predecessor period – the periods prior to the Separation Date (as defined below).

Preferred Interest – the preferred interest that the Company has in EQT Energy Supply, LLC (EES), a subsidiary of EQT.

Proxy Statement – the Company's definitive proxy statement relating to the 2022 annual meeting of shareholders to be filed with the Securities and Exchange Commission.

receipt point – the point where gas is received by or into a gathering system or transmission pipeline.

reservoir – a porous and permeable underground formation containing an individual and separate natural accumulation of producible hydrocarbons (crude oil and/or natural gas) which is confined by impermeable rock or water barriers and is characterized by a single natural pressure system.

Scope 1 emissions – direct greenhouse gas emissions from owned or controlled sources.

Scope 2 emissions – indirect greenhouse gas emissions from the generation of purchased energy.

Separation – the separation of EQT's midstream business, which was composed of the assets and liabilities of EQT's separately-operated natural gas gathering, transmission and storage and water services operations of EQT, from EQT's upstream business, which was composed of the natural gas, oil and natural gas liquids development, production and sales and commercial operations of EQT, which occurred on the Separation Date.

Separation Date – November 12, 2018.

throughput – the volume of natural gas transported or passing through a pipeline, plant, terminal or other facility during a particular period.

Water Services Letter Agreement – that certain letter agreement entered into on February 26, 2020 by the Company and EQT, pursuant to which EQT agreed to utilize the Company for the provision of water services in Pennsylvania under existing water services agreements and new water services agreements if negotiated between the parties, which letter agreement will be replaced by the 2021 Water Services Agreement.

wellhead – the equipment at the surface of a well used to control the well's pressure and the point at which the hydrocarbons and water exit the ground. 

working gas – the volume of natural gas in the storage reservoir that can be extracted during the normal operation of the storage facility.

Unless context otherwise requires, a reference to a "Note" herein refers to the accompanying Notes to Consolidated Financial Statements contained in "Item 8. Financial Statements and Supplementary Data."

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Abbreviations	Measurements
ARO – asset retirement obligations	Btu = one British thermal unit
ASC – Accounting Standards Codification	BBtu = billion British thermal units
ASU – Accounting Standards Update	Bcf   = billion cubic feet
CERCLA – Comprehensive Environmental Response, Compensation and Liability Act	Mcf = thousand cubic feet
DOT – United States Department of Transportation	MMBtu = million British thermal units
EPA – United States Environmental Protection Agency	MMcf  = million cubic feet
FASB – Financial Accounting Standards Board	MMgal = million gallons
FERC – United States Federal Energy Regulatory Commission
GAAP – United States Generally Accepted Accounting Principles
GHG – greenhouse gas
HCA – high consequence area
IRS – United States Internal Revenue Service
NAAQS – National Ambient Air Quality Standards
NGA – Natural Gas Act of 1938
NGPA – Natural Gas Policy Act of 1978
NYMEX – New York Mercantile Exchange
NYSE – New York Stock Exchange
PHMSA – Pipeline and Hazardous Materials Safety Administration of the DOT
RCRA – Resource Conservation and Recovery Act
SEC – United States Securities and Exchange Commission

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EQUITRANS MIDSTREAM CORPORATION

Cautionary Statements

Disclosures in this Annual Report on Form 10-K contain certain forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended (the Exchange Act), and Section 27A of the Securities Act of 1933, as amended (the Securities Act). Statements that do not relate strictly to historical or current facts are forward-looking and usually identified by the use of words such as "anticipate," "estimate," "could," "would," "will," "may," "forecast," "approximate," "expect," "project," "intend," "plan," "believe," "target" and other words of similar meaning in connection with any discussion of future operating or financial matters. Without limiting the generality of the foregoing, forward-looking statements contained in this Annual Report on Form 10-K include the matters discussed in the sections captioned "Strategy" under "Developments, Market Trends and Competitive Conditions" in "Item 1. Business" and "Outlook" in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations," and the expectations of plans, strategies, objectives, and growth and anticipated financial and operational performance of Equitrans Midstream Corporation (together with its subsidiaries, Equitrans Midstream or the Company), including:

•guidance and any changes in such guidance regarding the Company’s gathering, transmission and storage and water services revenue and volume, including the anticipated effects associated with the EQT Global GGA and related documents entered into with EQT;

•projected revenue (including from firm reservation fees) and volumes, deferred revenues, expenses and contract liabilities, and the effects on liquidity, leverage, projected revenue, deferred revenue and contract liabilities associated with the EQT Global GGA and the MVP project (including changes in the targeted full in-service date for such project);

•the ultimate gathering fee relief, and timing thereof, provided to EQT under the EQT Global GGA and related agreements, including the exercise by EQT of any cash-out option as an alternative to receiving a portion of such relief;

•the Company's ability to de-lever;

•the weighted average contract life of gathering, transmission and storage contracts;

•infrastructure programs (including the timing, cost, capacity and sources of funding with respect to gathering, transmission and storage and water projects);

•the cost to construct or restore right-of-way for, capacity, shippers for, timing of regulatory approvals and concluding litigation, final design (including expansions, extensions or refinements and capital related thereto), ability to contract additional capacity on, mitigate emissions from and complete, and targeted in-service dates of current or in-service projects or assets, in each case as applicable;

•the ultimate terms, partner relationships and structure of the MVP Joint Venture and ownership interests therein;

•the impact of changes in the targeted full in-service date of the MVP project on, among other things, the fair value of the Henry Hub cash bonus payment provision of the EQT Global GGA and the estimated transaction price allocated to the Company's remaining performance obligations under certain contracts with firm reservation fees and MVCs;

•expansion projects in the Company's operating areas and in areas that would provide access to new markets;

•the Company's ability to provide produced and mixed water handling services and realize expansion opportunities;

•the Company's ability to identify and complete acquisitions and other strategic transactions, including joint ventures, effectively integrate transactions into the Company's operations, and achieve synergies, system optionality, accretion and other benefits associated with transactions, including through increased scale;

•any credit rating impacts associated with the MVP project, customer credit ratings changes, defaults, acquisitions, dispositions and financings and any changes in EQM's credit ratings;

•the effect and outcome of future litigation and other proceedings, including regulatory proceedings;

•the effects of any consolidation of or effected by upstream gas producers, whether in or outside of the Appalachian Basin;

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•the timing and amount of future issuances or repurchases of the Company's securities;

•the effects of conversion, if at all, of the Equitrans Midstream Preferred Shares (as defined herein);

•the effects of seasonality;

•expected cash flows and MVCs, including those associated with the EQT Global GGA, and the potential impacts thereon of the commission timing and cost of the MVP project;

•the ability to achieve, and time for achieving, Hammerhead pipeline full commercial in-service;

•projected capital contributions and capital and operating expenditures, including the amount and timing of reimbursable capital expenditures, capital budget and sources of funds for capital expenditures;

•dividend amounts, timing and rates;

•changes in commodity prices and the effect of commodity prices on the Company's business;

•future decisions of customers in respect of curtailing natural gas production, timing of turning wells in line, rig and completion activity and related impacts on the Company's business;

•liquidity and financing requirements, including sources and availability;

•interest rates;

•the ability of the Company's subsidiaries (some of which are not wholly owned) to service debt under, and comply with the covenants contained in, their respective credit agreements and to timely extend and obtain modifications in terms under such agreements;

•expectations regarding natural gas and water volumes in the Company's areas of operations;

•the Company's ability to achieve anticipated benefits associated with the execution of the EQT Global GGA and other commercial agreements;

•the impact on the Company and its subsidiaries of the coronavirus disease 2019 (COVID-19) pandemic, including, among other things, effects on demand for natural gas and the Company’s services, commodity prices, access to capital and costs which may be incurred as a result of, and potential need for compliance with, governmental (including state or local) regulations or orders which may be enacted and upheld with respect to testing and/or vaccination for COVID-19;

•the Company's ability to achieve, and create value from, its environmental, social and governance (ESG) and sustainability targets (including targets set forth in its climate policy) and the Company's ability to respond to increasing stakeholder scrutiny in these areas;

•the effectiveness of the Company's information technology systems and practices to defend against evolving cyberattacks on United States critical infrastructure;

•the effects of government regulation including any quantification of potential impacts of regulatory matters related to climate change on the Company; and

•tax status and position.

The forward-looking statements included in this Annual Report on Form 10-K involve risks and uncertainties that could cause actual results to differ materially from projected results. Accordingly, investors should not place undue reliance on forward-looking statements as a prediction of actual results. The Company has based these forward-looking statements on management's current expectations and assumptions about future events. While the Company considers these expectations and assumptions to be reasonable, they are inherently subject to significant business, economic, competitive, regulatory, judicial and other risks and uncertainties, many of which are difficult to predict and are beyond the Company's control. The risks and uncertainties that may affect the operations, performance and results of the Company's business and forward-looking statements include, but are not limited to, those set forth under "Item 1A. Risk Factors," and elsewhere in this Annual Report on Form 10-K.

Any forward-looking statement speaks only as of the date on which such statement is made and the Company does not intend to correct or update any forward-looking statement, unless required by securities law, whether as a result of new information, future events or otherwise.

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PART I

Item 1.        Business

Overview of the Company

Equitrans Midstream is one of the largest natural gas gatherers in the U.S. and holds a significant transmission footprint in the Appalachian Basin. Equitrans Midstream, a Pennsylvania corporation, became an independent, publicly traded company on November 12, 2018, as a result of the Separation (as defined below).

The Separation. On November 12, 2018, Equitrans Midstream, EQT and, for certain limited purposes, EQT Production Company, a wholly owned subsidiary of EQT, entered into a separation and distribution agreement (the Separation and Distribution Agreement), pursuant to which, among other things, EQT effected the separation of its midstream business, which was composed of the assets and liabilities of the separately-operated natural gas gathering, transmission and storage and water services operations of EQT (the Midstream Business), from EQT's upstream business, which was composed of the natural gas, oil and natural gas liquids development, production and sales and commercial operations of EQT (the Separation), to Equitrans Midstream, and distributed 80.1% of the then-outstanding shares of common stock, no par value, of Equitrans Midstream (Equitrans Midstream common stock) to EQT shareholders of record as of the close of business on November 1, 2018 (the Distribution).

In connection with the Separation, the Company acquired control of the entities conducting the Midstream Business. See Note 1 to the consolidated financial statements for further information on the entities conducting the Midstream Business.

The Company's Post-Separation Relationship with EQT. The Company and EQT are separate companies with separate management teams and separate boards of directors. Although they operate separately, due to the approximately 5.3% of Equitrans Midstream's outstanding shares of common stock held by EQT as of December 31, 2021, the Company and EQT are characterized for certain purposes as related parties. In connection with the Separation and Distribution, the Company and EQT executed the Separation and Distribution Agreement and various other agreements to effect the Separation. See Notes 1 and 8 to the consolidated financial statements for further information on the relationship between the Company and EQT subsequent to the Separation.

EQGP Unit Purchases and Limited Call Right. On November 29, 2018, the Company entered into written agreements (the Unit Purchase Agreements) with certain investors owning an aggregate of 15,364,421 common units representing limited partner interests in EQGP (EQGP common units) for $20.00 per EQGP common unit that closed through a series of transactions ending on January 3, 2019 for an aggregate purchase price of $307.3 million (collectively, the EQGP Unit Purchases).

On December 31, 2018, the Company exercised a limited call right (the Limited Call Right) under EQGP's partnership agreement, pursuant to which, on January 10, 2019, the Company closed on the acquisition of the remaining 11,097,287 outstanding EQGP common units not owned by the Company or its affiliates for an aggregate purchase price of $221.9 million (such acquisition, together with the EQGP Unit Purchases, the EQGP Buyout), and EQGP became an indirect, wholly owned subsidiary of the Company. See Note 1 to the consolidated financial statements for further information on the EQGP Buyout.

EQM IDR Transaction. On February 22, 2019, Equitrans Midstream completed a simplification transaction pursuant to that certain Agreement and Plan of Merger, dated as of February 13, 2019 (the IDR Merger Agreement), by and among Equitrans Midstream and certain related parties, pursuant to which, among other things, (i) Equitrans Merger Sub, LP merged with and into EQGP (the Merger) with EQGP continuing as the surviving limited partnership and a wholly owned subsidiary of EQM, and (ii) each of (a) the IDRs in EQM, (b) the economic portion of the general partner interest in EQM and (c) the issued and outstanding EQGP common units were canceled, and, as consideration for such cancellation, certain affiliates of the Company received on a pro rata basis 80,000,000 newly-issued common units representing limited partner interests in EQM (EQM common units) and 7,000,000 newly-issued Class B units representing limited partner interests in EQM (Class B units), and EQGP Services, LLC (the EQM General Partner) retained the non-economic general partner interest in EQM (such transactions, collectively, the EQM IDR Transaction). Additionally, as part of the EQM IDR Transaction, the 21,811,643 EQM common units held by EQGP were canceled and 21,811,643 EQM common units were issued pro rata to certain subsidiaries of the Company. As a result of the EQM IDR Transaction, the EQM General Partner replaced EQM Midstream Services, LLC as the general partner of EQM. See Note 2 to the consolidated financial statements for further information on the EQM IDR Transaction.

EQM Series A Preferred Units. On March 13, 2019, EQM entered into a Convertible Preferred Unit Purchase Agreement, together with Joinder Agreements entered into on March 18, 2019, with certain investors (such investors, collectively, the Investors) to issue and sell in a private placement (the Private Placement) an aggregate of 24,605,291 Series A Perpetual Convertible Preferred Units (EQM Series A Preferred Units) representing limited partner interests in EQM for a cash purchase

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price of $48.77 per EQM Series A Preferred Unit, resulting in total gross proceeds of approximately $1.2 billion. The net proceeds from the Private Placement were used in part to fund the purchase price in the Bolt-on Acquisition (as defined in Note 3) and to pay certain fees and expenses related to the Bolt-on Acquisition, and the remainder was used for general partnership purposes. The Private Placement closed concurrently with the closing of the Bolt-on Acquisition on April 10, 2019. See Note 2 to the consolidated financial statements for further information on the EQM Series A Preferred Units, none of which remain outstanding, and Note 3 to the consolidated financial statement for further information on the Bolt-on Acquisition.

EQM Merger. On June 17, 2020, pursuant to that certain Agreement and Plan of Merger, dated as of February 26, 2020 (the EQM Merger Agreement), by and among the Company, EQM LP Corporation, a wholly owned subsidiary of the Company (EQM LP), LS Merger Sub, LLC, a wholly owned subsidiary of EQM LP (Merger Sub), EQM and the EQM General Partner, Merger Sub merged with and into EQM (the EQM Merger), with EQM continuing and surviving as an indirect, wholly owned subsidiary of the Company. Upon consummation of the EQM Merger, the Company acquired all of the outstanding EQM common units that the Company and its subsidiaries did not already own. Following the closing of the EQM Merger, EQM was no longer a publicly traded entity. See Note 2 to the consolidated financial statements for further information on the EQM Merger.

Preferred Restructuring Agreement. On February 26, 2020, the Company and EQM entered into a Preferred Restructuring Agreement (the Restructuring Agreement) with all of the Investors pursuant to which, at the effective time of the EQM Merger (the Effective Time): (i) EQM redeemed $600 million aggregate principal amount of the Investors' EQM Series A Preferred Units issued and outstanding immediately prior to the Restructuring Closing (as defined below), which occurred substantially concurrent with the closing of the EQM Merger, for cash at 101% of the EQM Series A Preferred Unit purchase price of $48.77 per such unit (the EQM Series A Preferred Unit Purchase Price) plus any accrued and unpaid distribution amounts and partial period distribution amounts, and (ii) immediately following such redemption, each remaining issued and outstanding EQM Series A Preferred Unit was exchanged for 2.44 shares of a newly authorized and created series of preferred stock, without par value, of Equitrans Midstream, convertible into Equitrans Midstream common stock (the Equitrans Midstream Preferred Shares) on a one for one basis, in each case, in connection with the occurrence of the “Series A Change of Control” (as defined in the Fourth Amended and Restated Agreement of Limited Partnership of EQM (as amended, the Former EQM Partnership Agreement)) that occurred upon the closing of the EQM Merger (collectively, the Restructuring and, the closing of the Restructuring, the Restructuring Closing). See Note 2 to the consolidated financial statements for further information on the Restructuring Agreement and the Restructuring.

The EQT Global GGA. On February 26, 2020 (the EQT Global GGA Effective Date), the Company entered into a Gas Gathering and Compression Agreement (the EQT Global GGA) with EQT for the provision by the Company of certain gas gathering services to EQT in the Marcellus and Utica Shales of Pennsylvania and West Virginia. Pursuant to the EQT Global GGA, EQT is subject to an initial annual MVC of 3.0 Bcf per day that gradually steps up to 4.0 Bcf per day through December 2031 following the full in-service date of the MVP. The EQT Global GGA runs from the EQT Global GGA Effective Date through December 31, 2035, and will renew annually thereafter unless terminated by EQT or the Company pursuant to its terms. Pursuant to the EQT Global GGA, the Company has certain obligations to build connections to connect EQT wells to its gathering system, which are subject to geographical limitations in relation to the dedicated area in Pennsylvania and West Virginia, as well as the distance of such connections to the Company's then-existing gathering system. In addition to the fees related to gathering services, the EQT Global GGA provides for potential cash bonus payments payable by EQT to the Company during the period beginning on the first day of the calendar quarter in which the MVP full in-service date occurs through the calendar quarter ending December 31, 2024 (the Henry Hub cash bonus payment provision). The potential cash bonus payments are conditioned upon the quarterly average of certain Henry Hub natural gas prices exceeding certain price thresholds.

The gathering MVC fees payable by EQT to the Company set forth in the EQT Global GGA are subject to potential reductions for certain contract years as set forth in the EQT Global GGA, conditioned to begin the first day of the quarter in which the full in-service date of the MVP occurs, which provide for estimated aggregate fee relief of approximately $270 million in the first twelve-month period, approximately $230 million in the second twelve-month period and approximately $35 million in the third twelve-month period. Further, the EQT Global GGA provides for a fee credit to the gathering rate for certain gathered volumes that also receive separate transmission services under certain transmission contracts. In addition, given that the MVP full in-service date did not occur by January 1, 2022, EQT has an option, exercisable through December 31, 2022, to forgo approximately $145 million of the gathering fee relief in such first twelve-month period and approximately $90 million of the gathering fee relief in such second twelve-month period in exchange for a cash payment from the Company to EQT in the amount of approximately $196 million (the EQT Cash Option). See Note 6 to the consolidated financial statements for further information on the EQT Global GGA.

Credit Letter Agreement. On February 26, 2020, in connection with the execution of the EQT Global GGA, the Company and EQT entered into a letter agreement (the Credit Letter Agreement) pursuant to which, among other things, (a) the Company

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agreed to relieve certain credit posting requirements for EQT, in an amount up to approximately $250 million, under its commercial agreements with the Company, subject to EQT maintaining a minimum credit rating from two of three rating agencies of (i) Ba3 with Moody’s Investors Service (Moody's), (ii) BB- with S&P Global Ratings (S&P) and (iii) BB- with Fitch Investor Services (Fitch) and (b) the Company agreed to use commercially reasonable good faith efforts to negotiate similar credit support arrangements for EQT in respect of its commitments to the MVP Joint Venture.

Water Services Letter Agreement and 2021 Water Services Agreement. On February 26, 2020, the Company entered into a letter agreement with EQT relating to the provision of water services in Pennsylvania (such letter agreement, the Water Services Letter Agreement). Subject to the effect of the 2021 Water Services Agreement (as defined below), the Water Services Letter Agreement would have been effective as of the first day of the first month following the MVP full in-service date and would have expired on the fifth anniversary of such date. During each year of the Water Services Letter Agreement, EQT had agreed to pay the Company a minimum $60 million per year annual revenue commitment (ARC) for volumetric water services provided in Pennsylvania, all in accordance with existing water service agreements and new water service agreements entered into between the parties pursuant to the Water Services Letter Agreement (or the related agreements).

On October 22, 2021, the Company and EQT entered into a new 10-year, mixed-use water services agreement covering operations within a dedicated area in southwestern Pennsylvania (as subsequently amended, the 2021 Water Services Agreement). The 2021 Water Services Agreement, which, upon its effectiveness, replaces the Water Services Letter Agreement and certain other existing Pennsylvania water services agreements, will become effective with the commencement of water delivery service to a certain EQT well pad (anticipated in the first quarter of 2022). Pursuant to the 2021 Water Services Agreement, EQT has agreed to pay the Company a minimum ARC for water services equal to $40 million in each of the first five years of the 10-year contract term and equal to $35 million per year for the remaining five years of the contract term.

Share Purchase Agreements. On February 26, 2020, the Company entered into two share purchase agreements (the Share Purchase Agreements) with EQT, pursuant to which the Company agreed to (i) purchase 4,769,496 shares of Equitrans Midstream common stock (the Cash Shares) from EQT in exchange for approximately $46 million in cash, (ii) purchase 20,530,256 shares of Equitrans Midstream common stock (the Rate Relief Shares and, together with the Cash Shares, the Share Purchases) from EQT in exchange for a promissory note in the aggregate principal amount of approximately $196 million (which EQT subsequently assigned to EQM as consideration for certain commercial terms under the EQT Global GGA), and (iii) pay EQT cash in the amount of approximately $7 million (the Cash Amount). On March 5, 2020, the Company completed the Share Purchases and paid the Cash Amount. The Company used proceeds from the EQM Credit Facility (as defined in Note 11) to fund the purchase of the Cash Shares and to pay the Cash Amount in addition to other uses of proceeds. After the closing of the Share Purchases, the Company retired the Cash Shares and the Rate Relief Shares. On September 29, 2020, the Company made a prepayment to EQM of all principal, interest, fees and other obligations outstanding under the promissory note EQT assigned to EQM and the promissory note was terminated.

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The following diagram depicts the Company's organizational and ownership structure as of December 31, 2021:

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Overview of Operations

The Company provides midstream services to its customers in Pennsylvania, West Virginia and Ohio through its three primary assets: the gathering system, which includes predominantly dry gas gathering systems of high-pressure gathering lines; the transmission system, which includes FERC-regulated interstate pipelines and storage systems; and the water network, which primarily consists of water pipelines and other facilities that support well completion and produced water handling activities.

As of December 31, 2021, the Company provided a majority of its natural gas gathering, transmission and storage services under long-term contracts that generally include firm reservation fees. The Company maintains a stable cash flow profile, with approximately 64% of the Company's operating revenues for the year ended December 31, 2021 generated from firm reservation fees. The percentage of the Company's revenues that are generated by firm reservation fees is expected to increase in future years as a result of the 15-year term EQT Global GGA, which includes an MVC of 3.0 Bcf per day that became effective on April 1, 2020 and gradually steps up to 4.0 Bcf per day through December 2031 following the full in-service date of the MVP. These contract structures enhance the stability of the Company's cash flows and limit its exposure to customer volume variability.

The Company's operations are focused primarily in southwestern Pennsylvania, northern West Virginia and southeastern Ohio, which are prolific resource development areas in the natural gas shale plays known as the Marcellus and Utica Shales. These regions are also the primary operating areas of EQT, which was the largest natural gas producer in the United States based on average daily sales volumes as of December 31, 2021 and the Company's largest customer as of December 31, 2021. EQT accounted for approximately 59% of the Company's revenues for the year ended December 31, 2021.

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The following is a map of the Company's gathering, transmission and storage and water services operations as of December 31, 2021. Also included are MVP and MVP Southgate routes, which projects are discussed in "Strategy" under "Developments, Market Trends and Competitive Conditions" in "Item 1. Business."

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Business Segments

The Company reports its operations in three segments that reflect its three lines of business: Gathering, Transmission and Water. These segments include all of the Company's operations. For discussion of the composition of the three segments, see Notes 1 and 5 to the consolidated financial statements.

The Company's three business segments correspond to the Company's three primary assets: the gathering system, transmission and storage system and water service system. The following table summarizes the composition of the Company's operating revenues by business segment.

	Years Ended December 31,
	2021		2020		2019
Gathering operating revenues	66	%	67	%	71	%
Transmission operating revenues	30	%	26	%	24	%
Water operating revenues	4	%	7	%	7	%

The Company's largest customer, EQT, accounted for approximately 59%, 64% and 69% of the Company's total revenues for the years ended December 31, 2021, 2020 and 2019, respectively.

Gathering Customers. For the year ended December 31, 2021, EQT accounted for approximately 59% of Gathering's revenues. Subject to certain exceptions and limitations, as of December 31, 2021, Gathering (inclusive of acreage dedications to Eureka Midstream Holdings, LLC (Eureka Midstream), a joint venture in which the Company has a 60% interest and that owns a 265-mile gathering header pipeline system in Ohio and West Virginia that services both dry Utica and wet Marcellus Shale production) had significant acreage dedications through which the Company has the right to elect to gather all natural gas produced from wells under dedicated areas in (i) Pennsylvania pursuant to agreements with EQT, including the EQT Global GGA, and agreements with certain other third parties, (ii) Ohio pursuant to agreements with EQT and other third parties, and (iii) West Virginia pursuant to the EQT Global GGA and agreements with certain other third parties.

The Company provides gathering services in two manners: firm service and interruptible service. Firm service contracts are typically long-term and often include firm reservation fees, which are fixed, monthly charges for the guaranteed reservation of pipeline access. Revenues under firm reservation fees also include fixed volumetric charges under MVCs. As of December 31, 2021, the gathering system had total contracted firm reservation capacity (including contracted MVCs) of approximately 7.0 Bcf per day (inclusive of Eureka Midstream contracted capacity), which included contracted firm reservation capacity of approximately 1.8 Bcf per day associated with the Company's high-pressure header pipelines. Including future capacity expected from expansion projects that are not yet fully constructed for which the Company has executed firm contracts, the gathering system had total contracted firm reservation capacity (including contracted MVCs) of approximately 8.1 Bcf per day (inclusive of Eureka Midstream contracted capacity) as of December 31, 2021, which included contracted firm reservation capacity of approximately 1.8 Bcf per day associated with the Company's high-pressure header pipelines. Volumetric-based fees can also be charged under firm contracts for each firm volume gathered, as well as for volumes gathered in excess of the firm contracted volume. Based on total projected contractual revenues, including projected contractual revenues from future capacity expected from expansion projects that are not yet fully constructed for which the Company has executed firm contracts, the Company's firm gathering contracts had a weighted average remaining term of approximately 14 years as of December 31, 2021.

Interruptible service contracts include volumetric-based fees, which are charges for the volume of natural gas gathered and generally do not guarantee access to the pipeline. These contracts can be short- or long-term. To the extent that capacity reserved by customers with firm service contracts is not fully used or excess capacity exists, the gathering system can allocate capacity to interruptible services.

The Company generally does not take title to the natural gas gathered for its customers but retains a percentage of wellhead gas receipts to recover natural gas used to power certain of its compressor stations and meet other requirements on the Company's gathering systems.

Transmission Customers. For the year ended December 31, 2021, EQT accounted for approximately 62% of Transmission's throughput and approximately 53% of Transmission's revenues. As of December 31, 2021, Transmission had an acreage dedication from EQT through which the Company had the right to elect to transport all gas produced from wells drilled by EQT under dedicated areas in Allegheny, Washington and Greene Counties in Pennsylvania and Wetzel, Marion, Taylor, Tyler, Doddridge, Harrison and Lewis Counties in West Virginia. The Company's other customers include LDCs, marketers, producers and commercial and industrial users. The Company's transmission and storage system provides customers with

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access to markets in Pennsylvania, West Virginia and Ohio and to the Mid-Atlantic, Northeastern, Midwestern and Gulf Coast markets through interconnect points with major interstate pipelines.

The Company provides transmission and storage services in two manners: firm service and interruptible service. Firm service contracts are typically long-term and often include firm reservation fees, which are fixed, monthly charges for the guaranteed reservation of pipeline and storage capacity. Volumetric-based fees can also be charged under firm contracts for firm volume transported or stored, as well as for volumes transported or stored in excess of the firm contracted volume. As of December 31, 2021, the Company had firm capacity subscribed under firm transmission contracts of approximately 5.6 Bcf per day, which includes future capacity expected from expansion projects that are not yet fully constructed for which the Company has executed firm transmission contracts and excludes 2.3 Bcf per day of firm capacity commitments associated with the MVP and MVP Southgate projects. As of December 31, 2021, the Company had firm storage capacity of approximately 29.8 Bcf subscribed under firm storage contracts. Based on total projected contractual revenues, including projected contractual revenues from future capacity expected from expansion projects that are not yet fully constructed for which the Company has executed firm contracts, the Company's firm transmission and storage contracts had a weighted average remaining term of approximately 13 years as of December 31, 2021.

Interruptible service contracts include volumetric-based fees, which are charges for the volume of natural gas transported and generally do not guarantee access to the pipeline or storage facility. These contracts can be short- or long-term. To the extent that capacity reserved by customers with firm service contracts is not fully used or excess capacity exists, the transmission and storage systems can allocate capacity to interruptible services.

The Company generally does not take title to the natural gas transported or stored for its customers but retains a percentage of gas receipts to recover natural gas used to power its compressor stations and meet other requirements of the Company's transmission and storage systems.

As of December 31, 2021, approximately 97% of Transmission's contracted firm transmission capacity was subscribed by customers under negotiated rate agreements under its tariff, while the remainder was subscribed at discounted rates under its tariff, which are rates below the recourse rates and above a minimum level. As of December 31, 2021, Transmission did not have any contracted firm transmission capacity subscribed at recourse rates under its tariff, which are the maximum rates an interstate pipeline may charge for its services under its tariff. See also "FERC Regulation" under "Regulatory Environment" below and "Our natural gas gathering, transmission and storage services are subject to extensive regulation by federal, state and local regulatory authorities. Changes in or additional regulatory measures adopted by such authorities, and related litigation, could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends.” included in "Item 1A. Risk Factors" for additional information.

Water Customers. For the year ended December 31, 2021, EQT accounted for approximately 96% of Water's revenues. The Company has the exclusive right to provide fluid handling services to certain EQT-operated wells through 2029 (and thereafter such right continues on a month-to-month basis) within areas of dedication in Belmont County, Ohio, including the delivery of fresh water for well completion operations and the collection and recycling or disposal of flowback and produced water. The Company also provides water services to other customers operating in the Marcellus and Utica Shales. Upon commencement of the 2021 Water Services Agreement, the majority of the Company's water service revenues will be subject to an ARC with EQT.

See also "Water Services Letter Agreement" and "2021 Water Services Agreement" above for additional information on the Company's Water customers.

The Company's Assets

Gathering Assets. As of December 31, 2021, the gathering system, inclusive of Eureka Midstream's gathering system, included approximately 1,170 miles of high-pressure gathering lines and 133 compressor units with compression of approximately 491,000 horsepower and multiple interconnect points with the Company's transmission and storage system and to other interstate pipelines.

Transmission and Storage Assets. As of December 31, 2021, the transmission and storage system included approximately 950 miles of FERC-regulated, interstate pipelines that have interconnect points to seven interstate pipelines and multiple LDCs. As of December 31, 2021, the transmission and storage system was supported by 43 compressor units, with total throughput capacity of approximately 4.4 Bcf per day and compression of approximately 136,000 horsepower, and 18 associated natural gas storage reservoirs, which had a peak withdrawal capacity of approximately 850 MMcf per day and a working gas capacity of approximately 43 Bcf.

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Water Assets. As of December 31, 2021, the fresh water systems included approximately 200 miles of pipeline that deliver fresh water from local municipal water authorities, the Monongahela River, the Ohio River, local reservoirs and several regional waterways. In addition, as of December 31, 2021, the water system assets included 23 fresh water impoundment facilities.

During 2021, the Company began construction of a mixed water system in Greene County, Pennsylvania. The system has a targeted full in-service date of summer 2022 and is primarily supported by the 2021 Water Services Agreement. The mixed water system is designed to include 71 miles of buried water pipeline, two water storage facilities with 350,000 barrels of capacity and two interconnects with the Company’s existing Pennsylvania fresh water systems and will provide services to producers in southwestern Pennsylvania. As of December 31, 2021, the Company’s mixed water system included approximately eight miles of buried pipeline.

Developments, Market Trends and Competitive Conditions

The Company's strategically-located assets overlay core acreage in the Appalachian Basin. The location of the Company's assets allows its producer customers to access major demand markets in the U.S. The Company is one of the largest natural gas gatherers in the U.S., and its largest customer, EQT, was the largest natural gas producer in the U.S. based on average daily sales volumes as of December 31, 2021. The Company maintains a stable cash flow profile, with approximately 64% of its operating revenues for the year ended December 31, 2021 generated from firm reservation fees. Further, as discussed above, the percentage of the Company's revenues that are generated by firm reservation fees is expected to increase in future years as a result of the 15-year term EQT Global GGA, which includes an MVC of 3.0 Bcf per day that became effective on April 1, 2020 and gradually steps up to 4.0 Bcf per day through December 2031 following the full in-service date of the MVP. This contract structure enhances the stability of the Company's cash flows and limits its exposure to customer volume variability.

Strategy. The Company's principal strategy is to achieve greater scale and scope, enhance the durability of its financial strength and to continue to work to position itself for a lower carbon economy, which strategy the Company expects will drive future growth and investment. The Company is implementing its strategy by continuing to leverage its existing assets, execute on its growth projects (including through potential expansion and extension opportunities), periodically evaluate strategically-aligned inorganic growth opportunities (whether within its existing footprint or to extend the Company's reach into the southeast United States to become closer to key demand markets, such as the Gulf of Mexico LNG export market), and focus on ESG and sustainability-oriented initiatives. Additionally, the Company is also continuing to focus on strengthening its balance sheet through:

•highly predictable cash flows backed by firm reservation fees;

•actions to de-lever its balance sheet;

•disciplined capital spending;

•operating cost control; and

•an appropriate dividend policy.

As part of its approach to organic growth, the Company is focused on its projects and assets outlined below, many of which are supported by contracts with firm capacity or MVC commitments.

The Company expects that the MVP project (should it be placed in-service), together with the Hammerhead pipeline and Equitrans, L.P. Expansion Project (EEP), will primarily drive the Company's organic growth, as discussed in further detail below.

•Mountain Valley Pipeline. The MVP is being constructed by a joint venture among the Company and affiliates of each of NextEra Energy, Inc., Consolidated Edison, Inc. (Con Edison), AltaGas Ltd. and RGC Resources, Inc. As of December 31, 2021, the Company owned an approximate 46.8% interest in the MVP project and will operate the MVP. The MVP is an estimated 300-mile, 42-inch diameter natural gas interstate pipeline with a targeted capacity of 2.0 Bcf per day that is designed to span from the Company's existing transmission and storage system in Wetzel County, West Virginia to Pittsylvania County, Virginia, providing access to the growing southeast demand markets. The MVP Joint Venture has secured a total of 2.0 Bcf per day of firm capacity commitments at 20-year terms. Additional shippers have expressed interest in the MVP project and the MVP Joint Venture is evaluating an expansion opportunity that could add approximately 0.5 Bcf per day of capacity through the installation of incremental compression.

In October 2017, the FERC issued the Certificate of Public Convenience and Necessity (the Certificate) for the MVP. In the first quarter of 2018, the MVP Joint Venture received limited notice to proceed with certain construction

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activities from the FERC and commenced construction. Following a comprehensive review of all outstanding stream and wetland crossings across the approximately 300-mile MVP project route, on February 19, 2021, the MVP Joint Venture submitted (i) a joint application package to each of the Huntington, Pittsburgh and Norfolk Districts of the U.S. Army Corps of Engineers (Army Corps) that requested an Individual Permit from the Army Corps to effect approximately 300 water crossings utilizing open cut techniques (the Army Corps Individual Permit) and (ii) an application to amend the Certificate that seeks FERC authority to utilize alternative trenchless construction methods to effect approximately 120 water crossings. Related to seeking the Army Corps Individual Permit, on March 4, 2021, the MVP Joint Venture submitted applications to each of the West Virginia Department of Environmental Protection (WVDEP) and the Virginia Department of Environmental Quality (VADEQ) seeking Section 401 water quality certification approvals or waivers (such approvals or waivers, the State 401 Approvals), which State 401 Approvals were each received in December 2021. In early June 2021, the FERC issued a notice of schedule for the MVP Joint Venture's Certificate amendment application and the FERC issued an Environmental Assessment in mid-August 2021. As discussed in Part I, "Item 3. Legal Proceedings" of this Annual Report on Form 10-K, on January 25, 2022, the MVP Joint Venture's authorizations related to the Jefferson National Forest (JNF) received from the Bureau of Land Management (BLM) and the U.S. Forest Service (USFS) were vacated and remanded on specific issues by the U.S. Court of Appeals for the Fourth Circuit (Fourth Circuit). As also discussed in Part I, "Item 3. Legal Proceedings" of this Annual Report on Form 10-K, on February 2, 2022, the Fourth Circuit vacated and remanded on specific issues the Biological Opinion and Incidental Take Statement issued by the United States Department of the Interior's Fish and Wildlife Service (FWS) for the MVP project. The MVP Joint Venture continues to review these recent decisions and evaluate the possible paths forward, which include working with the relevant federal agencies and consideration of potential legal appeals. As a result, the Company is not able to provide an update as to the in-service timing and overall cost for the project, except that the Company is no longer targeting a summer 2022 in-service date.

In addition to timely receiving, and subsequently maintaining, new authorizations in respect of the JNF, and a Biological Opinion and Incidental Take Statement, the MVP Joint Venture must, in order to complete the project, among other things, timely receive (i) the Army Corps Individual Permit (as well as timely receive, if necessary, certain other state-level approvals), and (ii) authorization from the FERC to amend the Certificate to utilize alternative trenchless construction methods for certain stream and wetland crossings, as well as any necessary extensions from FERC to complete the MVP project. The MVP Joint Venture also must (i) continue to have available the orders previously issued by the FERC, which are the subject of ongoing litigation, modifying its prior stop work orders and extending the MVP Joint Venture’s prescribed time to complete the MVP project; and (ii) timely receive authorization from the FERC to complete construction work in the portion of the project route currently remaining subject to the FERC’s previous stop work order and in the JNF. In each case, any such foregoing or other authorizations must remain in effect notwithstanding any pending or future challenge thereto. For further information regarding litigation and regulatory related delays affecting the completion of the MVP project, see Part I, "Item 3. Legal Proceedings" of this Annual Report on Form 10-K. See also "The regulatory approval process for the construction of new midstream assets is very challenging, has significantly increased costs and delayed targeted in-service dates, and decisions by regulatory and judicial authorities in pending or potential proceedings are likely to impact our or the MVP Joint Venture's ability to obtain or maintain in effect all approvals and authorizations necessary to complete certain projects on the targeted time frame or at all or our ability to achieve the expected investment returns on the projects." included in "Item 1A. Risk Factors" for additional discussion.

On November 4, 2019, Con Edison exercised an option to cap its investment in the construction of the MVP project at approximately $530 million (excluding AFUDC). The Company and NextEra Energy, Inc. are obligated, and RGC Resources, Inc., another member of the MVP Joint Venture owning an interest in the MVP project, has opted, to fund the shortfall in Con Edison's capital contributions on a pro rata basis. Such funding by the Company and funding by other members has and will correspondingly increase the Company's and such other members' respective interests in the MVP project and decrease Con Edison's interest in the MVP project. As a result, depending on the project's total cost, the Company's equity ownership in the MVP project will progressively increase to a percentage in excess of approximately 46.8%.

Through December 31, 2021, the Company had funded approximately $2.5 billion of its then-estimated total capital contributions. During the year ended December 31, 2021, the Company made approximately $284 million of capital contributions to the MVP Joint Venture for the MVP project. For 2022, the Company expects to make total capital contributions of approximately $175 million to $225 million related to work completed in late 2021 and ongoing right-of-way maintenance.

•Wellhead Gathering Expansion Projects and Hammerhead Pipeline. During the year ended December 31, 2021, the Company invested approximately $224 million in gathering projects (inclusive of capital expenditures related to the noncontrolling interest in Eureka Midstream). For 2022, the Company expects to invest approximately $270 million to

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$320 million in gathering projects (inclusive of expected capital expenditures of approximately $20 million related to the noncontrolling interest in Eureka Midstream). The primary projects include infrastructure expansion of core development areas in the Marcellus and Utica Shales in southwestern Pennsylvania, southeastern Ohio and northern West Virginia for EQT, Range Resources Corporation (Range Resources) and other producers.

The Hammerhead pipeline is a 1.6 Bcf per day gathering header pipeline that is primarily designed to connect natural gas produced in Pennsylvania and West Virginia to the MVP, Texas Eastern Transmission and Dominion Transmission, is supported by a 20-year term, 1.2 Bcf per day, firm capacity commitment from EQT, and cost approximately $540 million. For more information, including regarding full commercial in-service status for the Hammerhead pipeline, see "Outlook" in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations."

•Transmission Projects and Equitrans Expansion Project. During the year ended December 31, 2021, the Company invested approximately $26 million in transmission projects, including the EEP. The EEP is designed to provide north-to-south capacity on the mainline Equitrans, L.P. system, including primarily for deliveries to the MVP. A portion of the EEP commenced operations with interruptible service in the third quarter of 2019. The EEP provides capacity of approximately 600 MMcf per day and offers access to several markets through interconnects with Texas Eastern Transmission, Dominion Transmission and Columbia Gas Transmission. Once the MVP is fully placed in service, firm transportation agreements for 550 MMcf per day of capacity will commence under 20-year terms.

For 2022, the Company expects to invest approximately $45 million in transmission projects, inclusive of capital expenditures expected for 2022 associated with the Company's Ohio Valley Connector expansion project (OVCX). OVCX will increase deliverability on the Company's existing Ohio Valley Connector pipeline (OVC) by approximately 350 MMcf per day, create new receipt and delivery transportation paths, and enhance long-term reliability. The project is supported by new long-term firm capacity commitments of 330 MMcf per day, as well as an extension of approximately 1.0 Bcf per day of existing contracted mainline capacity for EQT. OVCX is designed to meet growing demand in key markets in the mid-continent and gulf coast through existing interconnects with long-haul pipelines in Clarington, Ohio. The targeted in-service date for the incremental OVC capacity is the third quarter of 2023. The Company expects to invest approximately $160 million, which includes approximately $130 million for new compression. The project is consistent with the Company's ongoing efforts to optimize existing assets and achieve capital efficiency.

•MVP Southgate Project. In April 2018, the MVP Joint Venture announced the MVP Southgate project, which is a proposed 75-mile interstate pipeline that is contemplated to extend from the MVP at Pittsylvania County, Virginia to new delivery points in Rockingham and Alamance Counties, North Carolina. The MVP Southgate project is backed by a 300 MMcf per day firm capacity commitment from Dominion Energy North Carolina, and, as currently designed, reflects potential expansion capabilities that could provide up to 900 MMcf per day of total capacity. The Company is expected to operate the MVP Southgate project and owned a 47.2% interest in the MVP Southgate project as of December 31, 2021.

The MVP Joint Venture submitted the MVP Southgate certificate application to the FERC in November 2018. The Final Environmental Impact Statement for the MVP Southgate project was issued on February 14, 2020. In June 2020, the FERC issued the Certificate of Public Convenience and Necessity for the MVP Southgate; however, the FERC, while authorizing the project, directed the Office of Energy Projects not to issue a notice to proceed with construction until necessary federal permits are received for the MVP project and the Director of the Office of Energy Projects lifts the stop work order and authorizes the MVP Joint Venture to continue constructing the MVP project. On August 11, 2020, the North Carolina Department of Environmental Quality (NCDEQ) denied the MVP Southgate project's application for a Clean Water Act Section 401 Individual Water Quality Certification and Jordan Lake Riparian Buffer Authorization due to uncertainty surrounding the completion of the MVP project. On March 11, 2021, the Fourth Circuit, pursuant to an appeal filed by the MVP Joint Venture, vacated the NCDEQ's denial and remanded the matter to the NCDEQ for additional review. On April 29, 2021, the NCDEQ reissued its denial of the MVP Southgate project's application for a Clean Water Act Section 401 Individual Water Quality Certification and Jordan Lake Riparian Buffer Authorization. On December 3, 2021, the Virginia State Air Pollution Control Board denied the permit for the MVP Southgate project’s Lambert compressor station, which decision the MVP Joint Venture has appealed (and such appeal is pending). See the discussion of litigation and regulatory related delays affecting the completion of the MVP Southgate project set forth in Part I, "Item 3. Legal Proceedings" of this Annual Report on Form 10-K.

Given the continually evolving regulatory and legal environment for greenfield pipeline construction projects, as well as factors specific to the MVP and MVP Southgate projects, including the December 2021 compressor station state air permit denial, the MVP Joint Venture is evaluating the MVP Southgate project, including engaging in discussions with Dominion Energy North Carolina regarding options with respect to the MVP Southgate project, including potentially

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refining the project’s design and timing in lieu of pursuing the project as originally contemplated. Dominion Energy North Carolina’s obligations under the precedent agreement in support of the original project are subject to certain conditions, including that the MVP Joint Venture complete construction of the project facilities by June 1, 2022, which deadline is subject to extension by virtue of previously declared events of force majeure. The Company is unable to predict the results of the discussions between the MVP Joint Venture and Dominion Energy North Carolina, including any potential modifications to the project, or ultimate undertaking or completion of the project.

The MVP Southgate project, as originally designed, was estimated to cost a total of approximately $450 million to $500 million, a portion of which the Company expected to fund. During the year ended December 31, 2021, the Company made approximately $4 million of capital contributions to the MVP Joint Venture for the MVP Southgate project. For 2022, the Company expects to make capital contributions of approximately $5 million to the MVP Joint Venture for the MVP Southgate project.

•Water Operations. During the year ended December 31, 2021, the Company invested approximately $35 million in its water infrastructure. For 2022, the Company expects to invest approximately $50 million in the operations of its water infrastructure in Pennsylvania, primarily for the construction of the mixed water system.

See "Sustainability and Corporate Responsibility" in "Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations" for a discussion of the Company's continued focus on ESG and sustainability matters which the Company believes will distinctively position the Company and create value.

Competitive Condition. Key competitors for new natural gas gathering systems include companies that own major natural gas pipelines, independent gas gatherers and integrated energy companies. When compared to the Company or its customers, some of the Company's competitors have operations in multiple natural gas producing basins, have greater capital resources and access to, or control of, larger natural gas supplies.

Competition for natural gas transmission and storage is primarily based on rates, customer commitment levels, timing, performance, commercial terms, reliability, service levels, location, reputation and fuel efficiencies. The Company's principal competitors in its transmission and storage market include companies that own major natural gas pipelines in the Marcellus and Utica Shales. In addition, the Company competes with companies that are building high-pressure gathering facilities that are able to transport natural gas to interstate pipelines without being subject to FERC jurisdiction. Major natural gas transmission companies that compete with the Company also have storage facilities connected to their transmission systems that compete with certain of the Company's storage facilities.

Key competition for water services includes natural gas producers that develop their own water distribution systems in lieu of employing the Company's water services assets and other natural gas midstream companies that offer water services. The Company's ability to attract customers to its water service business depends on its ability to evaluate and select suitable projects and to consummate transactions in a highly competitive environment.

Further, natural gas as a fuel competes with other forms of energy available to end-users, including coal, liquid fuels and, increasingly, renewable and alternative energy. Demand for renewable and alternative energy is increasing generally with changes in consumer preferences, governmental clean energy policies, and as renewable and alternative energy becomes more cost competitive with traditional fuels and more widely available. Continued increases in the demand for renewable and alternative energy at the expense of natural gas (or increases in the demand for other sources of energy, particularly if prices for natural gas are elevated relative to other forms of energy as fuel) could lead to a reduction in demand for natural gas gathering, transmission and storage, and water services.

Regulatory Environment

FERC Regulation. The Company's interstate natural gas transmission and storage operations are regulated by the FERC under the Natural Gas Act of 1938 (NGA), the Natural Gas Policy Act of 1978 (NGPA), and the regulations, rules and policies promulgated under those and other statutes. Certain portions of the Company's gathering operations are also currently rate-regulated by the FERC in connection with its interstate transmission operations. The Company's FERC-regulated operations are pursuant to tariffs approved by the FERC that establish rates (other than market-based rate authority), cost recovery mechanisms and terms and conditions of service to its customers. Generally, the FERC's authority extends to:

•rates and charges for the Company's natural gas transmission and storage services and FERC-regulated gathering services;

•certification and construction of new interstate transmission and storage facilities;

•abandonment of interstate transmission and storage services and facilities and certificated gathering facilities;

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•maintenance of accounts and records;

•relationships between pipelines and certain affiliates;

•terms and conditions of services and service contracts with customers;

•depreciation and amortization policies;

•acquisitions and dispositions of interstate transmission and storage facilities; and

•initiation and discontinuation of interstate transmission and storage services.

The FERC regulates the rates and charges for transmission and storage in interstate commerce. Unless market-based rates have been approved by the FERC, the maximum applicable recourse rates and terms and conditions for service are set forth in the pipeline's FERC-approved tariff. Generally, the maximum filed recourse rates for interstate pipelines are based on the cost of providing service, including the recovery of a return on the pipeline's actual and prudent historical investment costs. Key determinants in the ratemaking process include the depreciated capital costs of the facilities, the costs of providing service, the allowed rate of return and income tax allowance, as well as volume throughput and contractual capacity commitment assumptions.

Interstate pipelines may not charge rates or impose terms and conditions of service that, upon review by the FERC, are found to be unjust or unreasonable, unduly discriminatory or preferential. Rate design and the allocation of costs also can affect a pipeline's profitability. While the ratemaking process establishes the maximum rate that can be charged, interstate pipelines such as the Company's transmission and storage system are permitted to discount their firm and interruptible rates without further FERC authorization down to a specified minimum level, provided they do not unduly discriminate. In addition, pipelines are allowed to negotiate different rates with their customers, under certain circumstances. Changes to rates or terms and conditions of service, and contracts can be proposed by a pipeline company under Section 4 of the NGA, or the existing interstate transmission and storage rates or terms and conditions of service, and contracts may be challenged by a complaint filed by interested persons including customers, state agencies or the FERC under Section 5 of the NGA. Rate increases proposed by a pipeline may be allowed to become effective subject to refund and/or a period of suspension, while rates or terms and conditions of service that are the subject of a complaint under Section 5 of the NGA are subject to prospective change by the FERC. Rate increases proposed by a regulated interstate pipeline may be challenged and such increases may ultimately be rejected by the FERC.

The Company's interstate pipeline may also use negotiated rates that could involve rates above or below the recourse rate or rates that are subject to a different rate structure than the rates specified in the Company's interstate pipeline tariffs, provided that the affected customers are willing to agree to such rates and that the FERC has approved the negotiated rate agreement. A prerequisite for allowing the negotiated rates is that negotiated rate customers must have had the option to take service under the pipeline's recourse rates. As of December 31, 2021, approximately 97% of the system's contracted firm transmission capacity was subscribed by customers under negotiated rate agreements under its tariff. Some negotiated rate transactions are designed to fix the negotiated rate for the term of the firm transportation agreement and the fixed rate is generally not subject to adjustment for increased or decreased costs occurring during the contract term.

The FERC’s regulations also extend to the terms and conditions set forth in agreements for transmission and storage services executed between interstate pipelines and their customers. These service agreements are required to conform, in all material respects, with the form of service agreements set forth in the pipeline's FERC-approved tariff. Non-conforming agreements must be filed with and accepted by the FERC. In the event that the FERC finds that an agreement is materially non-conforming, in whole or in part, it could reject, or require the Company to seek modification of, the agreement, or alternatively require the Company to modify its tariff so that the non-conforming provisions are generally available to all customers or class of customers.

The FERC’s jurisdiction also extends to the certification and construction of new interstate transmission and storage facilities, including, but not limited to, acquisitions, facility replacements and upgrades, expansions, and abandonment of facilities and services. While the FERC currently exercises jurisdiction over the rates and terms of service for the Company’s FERC-regulated gathering services, these gathering facilities may not be subject to the FERC’s certification and construction authority. Prior to commencing construction of new or existing interstate transmission and storage facilities, an interstate pipeline must obtain (except in certain circumstances, such as where the activity is permitted under the FERC’s regulations or is authorized under the operator’s existing blanket certificate issued by the FERC) a certificate authorizing the construction, or file to amend its existing certificate, from the FERC.

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On April 19, 2018, the FERC issued a Notice of Inquiry (2018 Notice of Inquiry) seeking information regarding whether, and if so how, it should revise its approach under its currently effective policy statement on the certification of new natural gas transportation facilities (Certificate Policy Statement). The formal comment period in this proceeding closed on June 25, 2018. On February 18, 2021, the FERC issued another Notice of Inquiry in the same proceeding that modified and expanded the inquiry and renewed its request for public comment (together with the 2018 Notice of Inquiry, the Certificate Policy Statement NOI). The formal comment period closed May 26, 2021. On February 18, 2022, the FERC issued an Updated Certificate Policy Statement. The Company is evaluating the Updated Certificate Policy Statement, but at this time, it is not possible to predict the impact that the Updated Certificate Policy will have on the Company, if any.

In 2021, Congress did not pass legislation revising the NGA or other statutes that may impact the Company's existing facilities and operations or the ability to construct new facilities, though that remains a possibility in 2022. Potential areas of revision include, but are not limited to, (i) amending Section 5 of the NGA to allow the FERC to require a pipeline to make refunds from the date that a NGA Section 5 complaint was filed with the FERC if rates are later found to be unjust and unreasonable; (ii) amending Section 7 of the NGA affecting the ability of companies to exercise eminent domain; and (iii) amending Section 19(b) of the NGA to provide the FERC additional time to act on requests for rehearing.

Party control at the FERC changed in 2021, and the FERC reestablished its full complement of five commissioners. In 2021, FERC issued Order Nos. 871-B and -C (amending FERC regulations to prohibit the issuance of authorizations to proceed with construction while certain requests for rehearing are pending), demonstrated that it will consider climate change impacts in individual certificate proceedings, and incorporated enhanced environmental justice review in pipeline certificate orders. On February 18, 2022, the FERC issued an interim GHG policy. The Company is evaluating the interim GHG policy, but at this time, it is not possible to predict the impact that the interim GHG policy, or any future changes to that policy, will have on the Company, if any.

FERC Regulation of Gathering Rates and Terms of Service. Section 1(b) of the NGA exempts natural gas gathering facilities from regulation by the FERC under the NGA. While the FERC does not generally regulate the rates and terms of service over facilities determined to be performing a natural gas gathering function, it has traditionally regulated rates charged by interstate pipelines for gathering services performed on the pipeline's own gathering facilities when those gathering services are performed in connection with jurisdictional interstate transmission services. The Company currently maintains rates and terms of service in its tariff for unbundled gathering services performed on its gathering facilities in connection with the transmission service. Just as with rates and terms of service for transmission and storage services, the Company's rates and terms of service for its FERC-regulated low-pressure gathering system may be challenged by complaint and are subject to prospective change by the FERC. The Company has submitted an application to the FERC requesting authorization to abandon these low-pressure gathering facilities and services. As of December 31, 2021, the application remained pending before the FERC.

The Company believes that its high-pressure gathering systems meet the traditional tests the FERC has used to establish a pipeline's status as an exempt gatherer not subject to regulation as a jurisdictional natural gas company. However, the distinction between FERC-regulated transmission services and federally unregulated gathering services is often the subject of litigation in the industry, so the classification and regulation of these systems are subject to change based on future determinations by the FERC, the courts or the U.S. Congress.

Pipeline Safety and Maintenance. The Company's interstate natural gas pipeline system is subject to regulation by PHMSA. PHMSA has established safety requirements pertaining to the design, installation, testing, construction, operation and maintenance of gas pipeline facilities, including requirements that pipeline operators develop a written qualification program for individuals performing covered tasks on pipeline facilities and implement pipeline integrity management programs. These integrity management plans require more frequent inspections and other preventive measures to ensure safe operation of oil and natural gas transportation pipelines in high population areas or facilities that are hard to evacuate and areas of daily concentrations of people.

Notwithstanding the investigatory and preventative maintenance costs incurred in the Company's performance of customary pipeline management activities, the Company may incur significant additional expenses if anomalous pipeline conditions are discovered or more stringent pipeline safety requirements are implemented. For example, in April 2016, PHMSA published a notice of proposed rulemaking addressing several integrity management topics and proposing new requirements to address safety issues for natural gas transmission and gathering lines (the Mega Rule). The proposed Mega Rule would strengthen existing integrity management requirements, expand assessment and repair requirements to pipelines in areas with medium population densities and extend regulatory requirements to onshore gas gathering lines that are currently exempt. Part one of the Mega Rule was finalized on July 1, 2020 (see discussion below). Part three of the Mega Rule was finalized on November 15, 2021, with an effective date of May 16, 2022 (see discussion below). Part two of the Mega Rule will now be the final portion

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addressed by a future rulemaking activity which remains under development, and no expected date for finalization has been released by PHMSA.

Further, in June 2016, then-President Obama signed the Protecting Our Infrastructure of Pipelines and Enhancing Safety Act of 2016 (the 2016 Pipeline Safety Act), extending PHMSA's statutory mandate under prior legislation through 2019. In addition, the 2016 Pipeline Safety Act empowered PHMSA to address imminent hazards by imposing emergency restrictions, prohibitions and safety measures on owners and operators of gas or hazardous liquid pipeline facilities without prior notice or an opportunity for a hearing and also required PHMSA to develop new safety standards for natural gas storage facilities by June 2018. Pursuant to those provisions of the 2016 Pipeline Safety Act, PHMSA issued two separate Interim Final Rules in October 2016 and December 2016 that expanded the agency's authority to impose emergency restrictions, prohibitions and safety measures and strengthened the rules related to underground natural gas storage facilities, including well integrity, wellbore tubing and casing integrity. The December 2016 Interim Final Rule, relating to underground gas storage facilities, went into effect in January 2017. PHMSA determined, however, that it would not issue enforcement citations to any operators for violations of provisions of the December 2016 Interim Final Rule that had previously been non-mandatory provisions of American Petroleum Institute Recommended Practices 1170 and 1171 until one year after PHMSA issued a final rule. The final rule related to underground gas storage facilities became effective as of March 13, 2020.

Following the October 2016 Interim Final Rule, PHMSA also published three final rules on pipeline safety applicable to the Company: "Enhanced Emergency Order Procedures;" "Safety of Gas Transmission Pipelines: Maximum Allowable Operating Pressure Reconfirmation, Expansion of Assessment Requirements, and Other Related Amendments" (also known as the Mega Rule Part 1); and "Safety of Gas Gathering Pipelines: Extension of Reporting Requirements, Regulation of Large, High-Pressure Lines, and Other Related Amendments" (also known as the Mega Rule Part 3). The Enhanced Emergency Order Procedures rule, which became effective on December 2, 2019, implements an existing statutory authorization for PHMSA to issue emergency orders related to pipeline safety if an unsafe condition or practice, or a combination of unsafe conditions and practices, constitutes, or is causing an imminent hazard. The Safety of Gas Transmissions Pipelines rule, which went into effect on July 1, 2020, requires operators of certain gas transmission pipelines that have been tested or that have inadequate records to determine the material strength of their lines by reconfirming the Maximum Allowable Operating Pressure, and establishes a new Moderate Consequence Area for determining regulatory requirements for gas transmission pipeline segments outside of high consequence areas. The rule also establishes new requirements for conducting baseline assessments, incorporates into the regulations industry standards and guidelines regarding design, construction and in-line inspections, and new requirements for data integration and risk analysis in integrity management programs, including seismicity, manufacturing and construction defects, and crack and crack-like defects, and includes several requirements that allow operators to notify PHMSA of proposed alternative approaches to achieving the objectives of the minimum safety standards. The Safety of Gas Gathering Pipelines rule, which was finalized on November 15, 2021 and will go into effect on May 16, 2022, extends existing design, operational and maintenance, and reporting requirements to onshore natural gas gathering pipelines in rural areas. The rule requires operators of onshore gas gathering pipelines to report incidents and file annual reports, and creates new safety requirements that vary based on pipeline diameter and potential consequences of a failure. In 2021, the Company did not incur material compliance costs in connection with complying with the PHMSA rules applicable to the Company, and does not currently expect these rules to materially impact its future costs of operations and revenue from operations. However, the Company will continue to assess the impact of compliance with these rules on its future costs of operations and revenue from operations.

States are generally preempted by federal law in the area of pipeline safety, but state agencies may qualify to assume responsibility for enforcing federal regulations over intrastate pipelines. They may also promulgate additive pipeline safety regulations provided that the state standards are at least as stringent as the federal standards. Although many of the Company's natural gas facilities fall within a class that is not subject to integrity management requirements, the Company may incur significant costs and liabilities associated with repair, remediation, preventive or mitigation measures associated with its non-exempt transmission pipelines. The costs, if any, for repair, remediation, preventive or mitigating actions that may be determined to be necessary as a result of the testing program, as well as lost cash flows resulting from shutting down the Company's pipelines during the pendency of any such actions, could be material to capital expenditures, earnings and the Company's competitive position.

Should the Company fail to comply with DOT regulations adopted under authority granted to PHMSA, it could be subject to penalties and fines. PHMSA has the statutory authority to impose civil penalties for pipeline safety violations up to a maximum of approximately $220,000 per day for each violation and approximately $2.2 million for a related series of violations. This maximum penalty authority established by statute will continue to be adjusted periodically to account for inflation. In addition, the Company could be required to make additional maintenance capital expenditures in the future for the above described or similar regulatory compliance initiatives that are not reflected in its forecasted maintenance capital expenditures. The Company believes that its operations are in substantial compliance with all existing federal, state and local pipeline safety laws and regulations. However, the adoption of new laws and regulations, such as those proposed by PHMSA, could result in significant

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added costs or delays to in service or the termination of projects, which could have a material adverse effect on the Company in the future.

On December 27, 2020, then-President Trump signed the "Protecting our Infrastructure of Pipelines and Enhancing Safety (PIPES Act) of 2020," which reauthorized the federal pipeline safety program that expired in 2019. The PIPES Act identifies areas where Congress believed additional oversight, research, or regulations was needed. The PIPES Act includes new mandates for PHMSA to require operators to update, as needed, their emergency response plans and operating and maintenance plans. The PIPES Act also requires operators to manage records and update, as necessary, their existing district regulator stations to eliminate a common mode of failure. PHMSA will also require that leak detection and repair programs consider the environment, the use of advance lead detection practices and technologies, and that operators be able to locate and categorize all leaks that are hazardous to human safety, the environment, or that can become hazardous. The Company has not incurred and does not anticipate incurring material capital expenditures in connection with complying with the PIPES Act.

Cybersecurity. The U.S. government has continued to issue public warnings that indicate that energy assets might be specific targets of cyberattacks and, in May and July 2021, the U.S. Department of Homeland Security's Transportation Safety Administration (the TSA) issued security directives (as well as subsequent revisions thereto) applicable to certain midstream companies requiring such companies to comply with mandatory reporting measures and undertake a number of specific cybersecurity enhancements for both information technology (IT) and operational technology (OT) systems. The Company continues to work with the TSA to ensure compliance with the security directives and is implementing the requirements of those security directives, as needed. While such implementation is utilizing significant internal resources, implementation as of the filing date of this Annual Report on Form 10-K has not materially adversely affected the Company's business and operations.

The regulatory environment surrounding cybersecurity continues to evolve in ways that are frequently difficult to predict. We have been required and may further be required to expend additional resources as a result of current or new laws, regulations, directives or other requirements, or changes in the interpretation or enforcement practices thereof, related to cybersecurity, which could result in material compliance costs. Any failure to remain in compliance with laws or regulations governing cybersecurity, including TSA security directives, may result in penalties, fines, enforcement actions, or mandated changes in our practices, which may have a material adverse effect on our business and operations.

For further information, see also "Cyberattacks aimed at us or third parties, as well as any noncompliance by us with applicable laws and regulations governing cybersecurity and/or data privacy, could materially adversely affect us." under "Item 1A. Risk Factors."

OSHA Regulation. On September 9, 2021, President Biden announced a proposed new rule requiring that all employers with at least 100 employees require that their employees be fully vaccinated or require unvaccinated workers to produce a negative test result at least once a week. On November 4, 2021, the U.S. Department of Labor’s Occupational Safety and Health Administration (OSHA) issued an Emergency Temporary Standard (ETS) to carry out this mandate.

On January 13, 2022, the U.S. Supreme Court granted an application to stay the ETS pending disposition of petitions for review in the U.S. Court of Appeals for the Sixth Circuit. Effective January 26, 2022, OSHA withdrew the ETS as an enforceable emergency temporary standard, but did not withdraw the ETS as a proposed rule.

Should the ETS, or similar state or local requirement, take effect in the future, the Company expects it would be subject to such regulation concerning COVID-19 vaccination or testing. In that case, the Company may be required to implement a requirement that many or most employees get vaccinated, subject to limited exceptions, or be tested, resulting in additional costs to the Company. At this time, it is not possible to predict the impact that a vaccine or testing requirement would have on the Company or its workforce. Any such mandate may result in increased costs, operational disruptions or employee attrition, which could materially and adversely affect the Company’s business and results of operations.

OSHA has also implemented a National Emphasis Program in July 2021 that focuses on COVID-19. This program channels the agency’s resources toward inspections of employers with congregate work settings, to ensure they maintain safety protocols designed to limit the spread of the coronavirus (e.g., masking, social distancing). This program is not likely to impact the Company’s remote workers, but could result in increased inspections and fines at the Company’s congregate work settings.

OSHA is also focusing on hazards posed to workers by extreme heat. The Biden Administration has indicated that it considers heat-related illnesses to be a growing hazard because of climate change, has identified this area of policy as a priority for the Administration because of its disproportionate impact on communities of color. To combat this hazard, on September 1, 2021, OSHA implemented an enforcement initiative prioritizing inspections of work activities when the heat index exceeds 80 degrees Fahrenheit. OSHA is also developing a National Emphasis Program for heat inspections and, on October 27, 2021,

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OSHA issued an Advanced Notice of Proposed Rulemaking on heat injury and illness prevention in outdoor and indoor work settings. This notice signals OSHA’s intent to issue a rule requiring employers to take certain precautions to avoid heat-related illnesses amongst their employees. As with OSHA’s COVID-19 enforcement initiatives, these programs will not likely impact the Company’s remote employees, but could result in increased inspections and fines at the Company’s outdoor worksites.

Employee Health and Safety. As noted above, the Company is subject to a number of federal and state laws and regulations, including the federal Occupational Safety and Health Act and comparable state statutes, whose purpose is to protect the health and safety of workers. In addition, the OSHA hazard communication standard, the EPA community "right-to-know" regulations and comparable state laws and regulations require that information be maintained concerning hazardous materials used or produced in the Company's operations and that this information be provided to employees, state and local government authorities and citizens. The Company is confident that it is in substantial compliance with all applicable laws and regulations relating to worker health and safety.

Environmental Matters

General. The Company's operations are subject to stringent federal, state and local laws and regulations relating to the protection of the environment, which may have the following effects on the Company:

•requiring that the Company obtains various permits to conduct regulated activities;

•requiring the installation of pollution-control equipment or otherwise regulating the way the Company can handle or dispose of its wastes;

•limiting or prohibiting construction activities in sensitive areas, such as wetlands, water sources, or areas inhabited by endangered or threatened species; and

•requiring investigatory and remedial actions to mitigate or eliminate pollution conditions caused by the Company's operations or attributable to former operations.

In addition, the Company's operations and construction activities may be subject to county and local ordinances that restrict the time, place or manner in which those operations and activities may be conducted.

Failure to comply with these laws and regulations may trigger a variety of administrative, civil and criminal enforcement measures, including the assessment of monetary penalties, the imposition of investigatory and remedial obligations and the issuance of orders enjoining future operations or imposing additional compliance requirements. Also, certain environmental statutes impose strict, and in some cases joint and several, liability for the cleanup and restoration of sites where hydrocarbons or wastes have been disposed or otherwise released regardless of the fault of the current site owner or operator. Consequently, the Company may be subject to environmental liability at its currently owned or operated facilities for conditions caused by others prior to the Company's involvement.

The Company has implemented programs and policies designed to keep its pipelines and other facilities in compliance with existing environmental laws and regulations, and the Company does not believe that the cost of its compliance with such legal requirements will have a material adverse effect on its business, financial condition, results of operations, liquidity or ability to pay dividends to its shareholders. Nonetheless, the trend in environmental regulation is to place more restrictions and limitations on activities that may affect the environment, and it is generally expected that such trend will likely increase under the Biden Administration. Thus, there can be no assurance as to the amount or timing of future expenditures for environmental compliance or remediation, and actual future expenditures may be significantly in excess of the amounts the Company currently anticipates. For example, the Biden Administration has announced that it will be reviewing the National Ambient Air Quality Standards (NAAQS) for ozone and may make these standards more stringent. This could result in the areas in which the Company operates being designated as nonattainment areas. States that contain any areas designated as nonattainment areas will be required to develop implementation plans demonstrating how the areas will attain the applicable standard within a prescribed period of time. These plans may require the installation of additional equipment to control emissions. The EPA did not make the ozone NAAQS more stringent when it reviewed them in 2020, but the Biden Administration has indicated that it will reconsider that decision. In addition, in November 2021, the EPA issued a proposed rule that would make more stringent the volatile organic compound (VOC) and methane emissions limits on certain new and modified equipment in the oil and gas source category, including certain types of compressors and pneumatic pumps. The proposed rule would also extend these requirements to existing sources for the first time. Some states are also enacting methane reduction programs. For example, Pennsylvania has a methane reduction framework for the oil and gas industry that will result in an existing source VOC regulation with the stated goal of reducing methane emissions from well sites, compressor stations and pipelines.

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Compliance with these or other new regulations could, among other things, require installation of new emission controls on some of the Company's equipment, result in longer permitting timelines, and significantly increase the Company's capital expenditures and operating costs, which could adversely affect the Company's business. The Company continuously attempts to anticipate future regulatory requirements that might be imposed and works to remain in compliance with changing environmental laws and regulations and to minimize the costs of such compliance. While the Company believes that it is in substantial compliance with existing environmental laws and regulations, there is no assurance that the current conditions will continue in the future.

Additionally, on January 20, 2021, President Biden signed an executive order on "Protecting Public Health and the Environment and Restoring Science to Tackle the Climate Crisis," under which President Biden directed the heads of all federal agencies to review "all existing regulations, orders, guidance documents, policies, and any other similar agency actions (agency actions) promulgated, issued, or adopted" during the Trump Administration for consistency with the policies established in the Biden Administration order. Regulatory actions resulting from this review could adversely affect the Company’s business and results of operations, including by requiring additional capital expenditures and increasing operating costs.

The following is a discussion of several of the material environmental laws and regulations, as amended from time to time, that relate to the Company's business.

Hazardous Substances and Waste. The Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and comparable state laws impose liability, without regard to fault or the legality of the original conduct, on certain classes of persons who are considered to be responsible for the release of a "hazardous substance" into the environment. These persons include current and prior owners or operators of the site where a release of hazardous substances occurred and companies that transported, disposed or arranged for the transportation or disposal of the hazardous substances found at the site. Under CERCLA, these "responsible persons" may be subject to strict and joint and several liability for the costs of cleaning up the hazardous substances that have been released into the environment, for damages to natural resources and for the costs of certain health studies. CERCLA also authorizes the EPA and, in some instances, third parties, to act in response to threats to the public health or the environment and to seek to recover from the responsible classes of persons the costs they incur. It is not uncommon for neighboring landowners and other third parties to file claims for personal injury and property damage allegedly caused by hazardous substances or other pollutants released into the environment. The Company generates materials in the course of its ordinary operations that are regulated as "hazardous substances" under CERCLA or similar state laws and, as a result, may be jointly and severally liable under CERCLA, or such laws, for all or part of the costs required to clean up sites at which these hazardous substances have been released into the environment.

In the ordinary course of the Company's operations, the Company generates wastes constituting solid wastes, and in some instances hazardous wastes, which are subject to the requirements of the Resource Conservation and Recovery Act (RCRA) and comparable state statutes. While the RCRA regulates both solid and hazardous wastes, it imposes strict requirements on the generation, storage, treatment, transportation and disposal of hazardous wastes. While certain petroleum production wastes are excluded from RCRA's hazardous waste regulations, it is possible that these wastes will in the future be designated as "hazardous wastes" and be subject to more rigorous and costly disposal requirements, which could have a material adverse effect on the Company's maintenance capital expenditures and operating expenses.

The Company owns, leases or operates properties where petroleum hydrocarbons are being or have been handled for many years. The Company has generally utilized operating and disposal practices that are standard in the industry at the time, although petroleum hydrocarbons or other wastes may have been disposed of or released on or under the properties owned, leased or operated by the Company, or on or under the other locations where these petroleum hydrocarbons and wastes have been transported for treatment or disposal. Petroleum hydrocarbons or other wastes may have been disposed or released on certain of these properties by third parties that previously operated, owned or leased these properties and whose treatment and disposal or release of petroleum hydrocarbons and other wastes were not under the Company's control. These properties and the wastes disposed thereon may be subject to CERCLA, RCRA and analogous state laws. Under these laws, the Company could be required to remove or remediate previously disposed wastes (including wastes disposed of or released by prior owners or operators), to clean up contaminated property (including contaminated groundwater) or to perform remedial operations to prevent future contamination.

Air Emissions. The federal Clean Air Act and comparable state laws and regulations restrict the emission of air pollutants from various industrial sources, including the Company's compressor stations, and also impose various monitoring and reporting requirements. Such laws and regulations may require that the Company obtain pre-approval for the construction or modification of certain projects or facilities, obtain and strictly comply with air permits containing various emissions and operational limitations and utilize specific emission control technologies to limit emissions. The Company's failure to comply with these requirements could subject it to monetary penalties, injunctions, conditions or restrictions on operations and, potentially, criminal enforcement actions. The Company may be required to incur certain capital expenditures in the future for air pollution control equipment in connection with obtaining and maintaining permits and approvals for air emissions. These types of capital

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expenditures could also be required in areas that are nonattainment for the ozone national ambient air quality standards depending on the design of the relevant state’s implementation plan to meet the air quality standards. Future compliance with these requirements may require modifications to certain of the Company's operations, including the installation of new equipment to control emissions from the Company's compressors, that could result in significant costs, including increased capital expenditures and operating costs, and could adversely affect the Company's business.

Climate Change. The Company has announced a goal of becoming net zero for carbon by 2050. The Company’s climate policy includes two interim emission reduction targets: (i) a 50 percent reduction of its Scope 1 and Scope 2 methane emissions by 2030; and (ii) a 50 percent reduction of its total Scope 1 and Scope 2 greenhouse gas (GHG) emissions by 2040.

Legislative and regulatory measures to address climate change and GHG emissions are in various phases of discussion or implementation and will be a major focus of the Biden Administration. On January 27, 2021, President Biden signed an executive order on "Tackling the Climate Crisis at Home and Abroad." This executive order contains sweeping direction to the executive branch to address climate issues. Among other things, the order put a "pause" on any new oil and natural gas leases on public lands or in offshore waters pending completion of a review by the Department of the Interior. A district court issued an injunction halting the leasing pause, but the Biden Administration is appealing that decision. Under the executive order, the Interior Department issued a report in November 2021 in response to this executive order that recommends increasing the oil and gas royalties associated with fossil fuels extracted from public lands and offshore waters.

The EPA regulates GHG emissions from new and modified facilities that are potential major sources of criteria pollutants under the Clean Air Act's Prevention of Significant Deterioration and Title V programs and has adopted regulations that require, among other things, preconstruction and operating permits for certain large stationary sources and the monitoring and reporting of GHGs from certain onshore oil and natural gas production sources on an annual basis.

The EPA regulates methane and VOCs from the oil and gas sector through its new source performance standard program under the Clean Air Act. In May 2016, the EPA finalized rules (Subpart OOOOa) that impose methane and VOC emissions limits on certain types of new and modified compressors and pneumatic pumps. The EPA finalized amendments to some requirements in these standards in March 2018, September 2018 and September 2020, including rescission of certain requirements and revisions to other requirements such as fugitive emissions monitoring frequency. In September 2020, the EPA issued a final rule (known as the Policy Rule) that "corrected" the regulations by removing the transmission and storage segments from the source category subject to the rule and removing the methane emissions limits from the rule. Congress revoked the Policy Rule through the Congressional Review Act, and President Biden signed this into law in June 2021. The Congressional Review Act action has the effect as though the Policy Rule never existed. The revocation of the Policy Rule did not affect Equitrans Midstream because the Company never stopped complying with the Subpart OOOOa methane and VOC emissions limits. In November 2021, the EPA issued a proposed rule that proposes to do three things: (i) modify Subpart OOOOa to, among other things, increase fugitive emissions monitoring frequency; (ii) promulgate a new Subpart OOOOb that would impose more stringent requirements on new and modified oil and gas sources; and (iii) promulgate an emissions guideline (a new Subpart OOOOc) that would provide direction to the states to regulate VOC and methane emissions from existing sources in the sector for the first time. The proposed Subpart OOOOc would largely regulate existing sources in the same manner in which new and modified sources are regulated. If the proposed rule is finalized, the Company will be required to incur certain capital expenditures in the future for air pollution control equipment, increased fugitive emissions monitoring, and other requirements that could result in significant costs and could adversely affect the Company's business.

In addition, in 2015, the U.S., Canada, and the U.K. participated in the United Nations Conference on Climate Change, which led to the creation of the Paris Agreement. The Paris Agreement, which was signed by the U.S. in April 2016, requires countries to review and "represent a progression" in their intended nationally determined contributions (which set GHG emission reduction goals) every five years beginning in 2020. The United States withdrew from the Paris Agreement in 2020; however, President Biden signed an executive order on January 20, 2021, for the United States to rejoin the Paris Agreement. The United States participated in the United Nations Conference on Climate Change in Glasgow, Scotland in November 2021 and was one of the countries entering into a Global Methane Pledge. One of the key pieces of the U.S. Methane Emissions Reduction Action Plan that was announced is the EPA’s proposed methane rules for the oil and gas sector. In April 2021, the United States announced its commitment to reduce its greenhouse gas emissions by 50 to 52 percent from 2005 levels by 2030. Depending on how this reduction is to be achieved, the Company could be required to reduce its GHG emissions, which would increase the Company’s cost of environmental compliance.

The U.S. Congress, along with federal and state agencies, has considered measures to reduce the emissions of GHGs. Legislation or regulation that imposes a carbon tax on carbon emissions or that restricts those emissions could increase the Company's cost of environmental compliance through the Company's incurrence of increased non-income taxes or by requiring

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the Company to install new equipment to reduce emissions from larger facilities and/or, depending on any future legislation, purchase emission allowances. The effect of climate change legislation or regulation on the Company's business is currently uncertain. If the Company incurs additional costs to comply with such legislation or regulations, it may not be able to pass on the higher costs to its customers or recover all the costs related to complying with such requirements and any such recovery may depend on events beyond the Company's control, including the outcome of future rate proceedings before the FERC or state regulatory agencies and the provisions of any final legislation or implementing regulations. The Company's future results of operations, cash flows or financial condition could be adversely affected if such costs are not recovered through regulated rates or otherwise passed on to its customers. Additionally, the Company's producer customers may also be affected by legislation or regulation, which may, directly or indirectly, adversely impact their ability and willingness to produce natural gas and accordingly affect such producers' financial health or reduce the volumes delivered to the Company and demand for its services. Climate change and GHG legislation or regulation could delay or otherwise negatively affect efforts to obtain and maintain permits and other regulatory approvals for existing and new facilities, impose additional monitoring and reporting requirements or adversely affect demand for the natural gas the Company gathers, transports and stores. The effect on the Company of any new legislative or regulatory measures will depend on the particular provisions that are ultimately adopted.

See also "Our business is subject to climate change-related transitional risks (including evolving climate-focused regulation and climate change-driven trends, emphasizing financing non-fossil fuel businesses and prompting pursuit of emissions reductions, lower-carbon technologies and alternative forms of energy) and physical risks that could significantly increase our operating expenses and capital costs, adversely affect our customers' development plans, and reduce demand for our products and services." under "Item 1A. Risk Factors" in this Annual Report on Form 10-K for the year ended December 31, 2021.

Water Discharges. The federal Clean Water Act and analogous state laws impose restrictions and strict controls regarding the discharge of pollutants or dredged and fill material into state waters as well as waters of the United States, including adjacent wetlands. The discharge of pollutants into regulated waters is prohibited, except in accordance with the terms of permits issued by the EPA, the Army Corps or an analogous state agency. In September 2015, new EPA and Army Corps rules defining the scope of the EPA's and the Army Corps' jurisdiction became effective (the 2015 Clean Water Rule), however, the 2015 Clean Water Rule was promptly challenged in courts and was enjoined by judicial action in some states. Further, in October 2019 the EPA issued a rule repealing the 2015 Clean Water Rule and recodifying the preexisting regulations. In June 2020, new EPA and Army Corps regulations narrowing the regulatory scope of the Clean Water Act became effective (the 2020 Navigable Waters Protection Rule). Like the 2015 Clean Water Rule, the 2020 Navigable Water Protection Rule was promptly challenged in courts and has been enjoined by judicial action in at least one state. On December 7, 2021, EPA and the Army Corps published a proposed rule that would reinstate the pre-2015 definition of waters of the United States, updated to reflect recent Supreme Court decisions. To the extent that any future rules expand the scope of the Clean Water Act's jurisdiction, the Company could face increased costs and delays with respect to obtaining permits for activities in jurisdictional waters, including wetlands.

Spill prevention, control and countermeasure requirements of federal laws require appropriate containment berms and similar structures to help prevent the contamination of regulated waters in the event of a hydrocarbon spill, rupture or leak. In addition, the Clean Water Act and analogous state laws require individual permits or coverage under general permits for discharges of storm water runoff from certain types of facilities. Federal and state regulatory agencies can impose administrative, civil and criminal penalties for non-compliance with discharge permits or other requirements of the Clean Water Act and analogous state laws. The Company believes that compliance with existing permits and foreseeable new permit requirements will not have a material adverse effect on its business, financial condition, results of operations, liquidity or ability to pay dividends to its shareholders.

National Environmental Policy Act. The construction of interstate natural gas transportation pipelines pursuant to the NGA requires authorization from the FERC. The FERC actions are subject to the National Environmental Policy Act (NEPA). NEPA requires federal agencies, such as the FERC, to evaluate major federal actions having the potential to significantly affect the environment. In the course of such evaluations, an agency will either prepare an environmental assessment that examines the potential direct, indirect and cumulative effects of a proposed project or, if necessary, a more detailed Environmental Impact Statement. Any proposed plans for future construction activities that require FERC authorization will be subject to the requirements of NEPA. This process has the potential to significantly delay or limit, and significantly increase the cost of, development of midstream infrastructure. In September 2020, new Council on Environmental Quality regulations intended to streamline the NEPA evaluation process went into effect. These rules have been challenged in courts, although initial efforts to enjoin enforcement of the rule were unsuccessful.

Endangered Species Act. The federal Endangered Species Act (ESA) restricts activities that may adversely affect endangered and threatened species or their habitats. Federal agencies are required to ensure that any action authorized, funded or carried out by them is not likely to jeopardize the continued existence of listed species or modify their critical habitat. While some of the Company's facilities are located in areas that are designated as habitats for endangered or threatened species, the Company is confident that it is in substantial compliance with the ESA. The designation of previously unprotected species as being

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endangered or threatened, or the designation of previously unprotected areas as a critical habitat for such species, has caused and could in the future cause the Company to incur additional costs, resulted in and could in the future result in delays in construction of pipelines and facilities, or cause the Company to become subject to operating restrictions in areas where the species are known to exist. For example, the FWS continues to receive hundreds of petitions to consider listing additional species as endangered or threatened and is being regularly sued or threatened with lawsuits to address these petitions. Some of these legal actions may result in the listing of species located in areas in which the Company operates. Throughout 2020, the United States Department of Interior narrowed the ESA regulations and their applicability. These regulations have been challenged in the courts.

Environmental Justice. The federal government has made advancing environmental justice a priority and has announced a number of new initiatives in the area. Some of those initiatives could have impacts on the business of oil and gas companies, although the ultimate form of the federal government’s approach to these issues is unknown and the impact to the oil and gas industry remains uncertain. The Biden Administration announced a renewed commitment to environmental justice in its day one executive order on climate change and the environment and followed up that action with an executive order establishing new environmental justice advisory committees tasked with helping the government devise new environmental justice policies. Since that time, the White House Environmental Justice Advisory Committee has released recommendations that include new spending priorities, development of environmental justice impact assessment techniques, and legal enforcement recommendations. The Department of Justice and the EPA Office of Enforcement and Compliance Assurance have issued policy statements indicating that both agencies will seek to enhance prosecution of environmental justice crimes and to seek out ways to address environmental justice through the legal system. EPA has also issued a number of statements indicating that it will attempt to address environmental justice issues more substantially through its policy making. It is unclear how these new policies will be implemented, and Equitrans Midstream will continue to monitor new developments and assess whether and how they may affect the Company.

States are also in the process of reexamining environmental justice law and policy. Pennsylvania’s governor signed an executive order in October 2021 creating an Office of Environmental Justice within the Pennsylvania Department of Environmental Protection. It is tasked with revising Pennsylvania’s environmental justice policies and examining ways to advance environmental justice issues. In Virginia, the legislature enacted the Environmental Justice Act of 2020, which requires state agencies to examine the environmental justice impacts of their actions and creates a council to recommend new environmental justice policies. Ohio and West Virginia appear to be monitoring developments at the EPA. Many of the key issues before the states appear to be focused on enhancing public participation in permitting and other project development-related decisions. State agencies also appear to be considering new approaches to environmental justice in permitting decisions, potentially denying permits or other authorizations on environmental justice grounds. Equitrans Midstream will continue to monitor state legal and regulatory developments in this area and respond as appropriate.

The majority of environmental justice litigation matters appear to be focused on whether state or federal agencies with permitting or other decision-making responsibility have adequately considered environmental justice issues during the decision-making process. Many advocacy organizations purport to raise environmental justice issues in connection with permitting legal challenges. Equitrans Midstream will continue to monitor these litigation-related developments.

Equitrans Midstream has a number of policies in place that address environmental justice issues. One of the Company’s pillars of sustainability is stakeholder engagement, including engagement with the communities where Equitrans Midstream operates. In 2021, Equitrans Midstream published its Stakeholder Engagement and Community Investment Policy, which emphasizes early and consistent community engagement throughout project development and operation, and it specifically prioritizes environmental justice and environmental stewardship. The Company has also adopted a Human Rights Policy committing the Company to safeguarding dignity and respect for all people throughout the Company’s value chain, including through community engagement and the prevention of discrimination.

Equitrans Midstream is in the process of developing a comprehensive environmental justice policy. The Company will continue that work, mindful of new developments at the federal, state, and local levels.

Seasonality

Weather affects natural gas demand for power generation and heating purposes. Peak demand for natural gas typically occurs during the winter months as a result of the heating load.

Human Capital Management

To ensure that we are well positioned to provide innovative solutions and reliable energy infrastructure services in a safe, efficient, and responsible manner and in a changing economic landscape focused on long-term, sustainable operations, the

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Company seeks to employ a team of highly accomplished people who are dedicated to the Company’s success and to foster an engaging workplace environment that provides for competitive pay and benefits, attractive career development opportunities, and a collaborative, respectful culture.

As of December 31, 2021, the Company had 766 employees. During 2021, the Company's overall turnover was just over 5% (with approximately 4.5% being voluntary turnover) of the total employee population.

Company Culture. The Company’s five core values of Safety, Integrity, Collaboration, Transparency, and Excellence shape its culture and identity and provide the framework for employee conduct and the Company’s relationships with its stakeholders.

The Company continues to utilize a cross-functional Culture Champions Group which solicits employee feedback on ways to further enhance corporate culture. In 2021, the Company completed its second anonymous culture survey and is in the process of assessing the results and determining key actions to implement in 2022.

Safety. Above all else, safety is the Company's main priority – this includes the safety of its employees, contractors, and communities – always. The Company is committed to maintaining a strong safety culture and continuing to identify and mitigate safety risks. The Health, Safety, Security and Environmental Committee of the Company's Board of Directors (Board) provides oversight for the Company's safety initiatives. The Company tracks numerous safety-related metrics to evaluate its safety performance and has incorporated safety metrics into the Company's annual incentive plan.

Diversity and Inclusion. The Company believes that diversity of thought and perspective and a team-based approach are essential to its continued success and is committed, through its Inclusion Program and other initiatives, to continuing to build a diverse, inclusive, respectful, and safe workplace. During 2021, the Company hosted, and more than 700 employees attended, eight guest speaking sessions on inclusion topics; became a Certified Age-Friendly Employer through the Age-Friendly Institute and a Corporate Champion of the Wounded Warrior Project; signed the CEO Pledge through the CEO Action for Diversity and Inclusion Coalition to publicly acknowledge the importance of diversity and inclusion; led a Pronouns Matter Campaign to encourage employees to select their preferred pronouns; provided a platform for employees to review inclusion-related content on a bi-monthly basis; facilitated Unconscious Bias training for all employees; and published an Inclusion Scorecard to capture relevant employee demographics for discussion with leadership and for all employees to review.

The Company also partners with several diverse organizations to broaden and extend its recruitment efforts, including HBCUConnect.com (Historically Black Colleges and Universities Connect), DiversityJobs.com, and RetirementJobs.com.

Total Rewards. The Company believes its employees are critical to its success and its total rewards and benefits are structured to attract and retain a talented and engaged workforce. These benefits include comprehensive health insurance for full- and part-time employees; a robust wellness program; annual flu immunizations and paid time off for COVID-19 vaccinations; access to an Employee Assistance Program; tuition reimbursement; adoption assistance and paid new parent leave; paid time off for holidays, vacation, bereavement, jury duty, military and volunteer time; paid short- and long-term disability, life insurance, and business travel insurance; medical spending accounts for eligible retirees; competitive base salaries and an annual incentive plan and long-term incentive opportunities; and a robust retirement plan with generous company matching and non-elective contributions. In addition, the Company offers flexible work arrangements based on job duties, which the Company believes will increasingly enable it to compete for talent on a broad geographic basis.

Talent Development. The Company believes it has a robust talent and leadership development framework. The Management Development and Compensation Committee of the Board oversees the development program for the Company's executive officers and other key management personnel. The Company provides leadership training to multiple levels of Company leaders and managers, as well as customized, executive-level assessment and development programs for senior leaders. Employees at all levels within the Company are encouraged to participate in relevant developmental opportunities through Company partnerships with external learning organizations and all employees are encouraged to complete an annual development plan.

Additional Information. The Company publishes an annual Corporate Sustainability Report (CSR), which contains the most recent available data on a variety of topics, including those discussed above under the heading "Human Capital Management." Copies of the 2021 CSR are available free of charge on the Company’s website (www.equitransmidstream.com) by selecting the "Sustainability" tab on the main page and then the "Sustainability Reporting" link. Information included in the CSR or our website is not incorporated into this Annual Report on Form 10-K.

Availability of Reports

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The Company makes certain filings with the SEC, including its Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and all amendments and exhibits to those reports, available free of charge through its website, www.equitransmidstream.com, as soon as reasonably practicable after they are filed with or furnished to the SEC. Reports filed with, or furnished to, the SEC are also available on the SEC's website at www.sec.gov.

Item 1A.    Risk Factors

In addition to the other information contained in this Annual Report on Form 10-K, the following risk factors (and related summary) should be considered in evaluating our business and future prospects. The following discussion of risk factors, including the summary, contains forward-looking statements. The summary below is not exhaustive and is qualified by reference to the full set of risk factors set forth in this section.

The risk factors may be important for understanding any statement in this Annual Report on Form 10-K or elsewhere. The following information, including the full set of risk factors set forth in this section, should be read in conjunction with "Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations" and the financial statements and accompanying notes included in "Item 8. Financial Statements and Supplementary Data." Note that additional risks not presently known to us or that are currently considered immaterial may also have a negative impact on our business and operations. If any of the events or circumstances described below actually occurs, our business, financial condition, results of operations, liquidity or ability to pay dividends could suffer and the trading price of our common stock could decline.

Because of the following factors, as well as other variables affecting our results of operations, past performance may not be a reliable indicator of future performance, and historical trends should not be used to anticipate results or trends in future periods.

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Summary of Risk Factors

Risks Related to Our Operations

•We depend on EQT for a substantial majority of our revenues and therefore are subject to the business and liquidity risks of EQT, and any decrease in EQT's drilling or completion activity could adversely affect us.

•Decreases in production of natural gas in our areas of operation, and the lack of diversification of our assets and geographic locations, could further adversely affect us.

•The regulatory approval process for the construction of new midstream assets is very challenging and has significantly impacted, and in the future could impact, our and the MVP Joint Venture's ability to obtain or maintain all approvals necessary to complete certain projects on time or at all. If we do not complete expansion projects and/or identify and complete inorganic growth opportunities, our future growth may be limited.

•Reviews of our goodwill, intangible and other long-lived assets and equity method investment in the MVP Joint Venture have resulted in and could result in significant impairment charges.

•Cyberattacks aimed at us or third parties, as well as any noncompliance by us with applicable laws and regulations governing cybersecurity and/or data privacy, could materially adversely affect us.

•Increasing scrutiny and changing stakeholder expectations for ESG matters and sustainability practices may adversely affect us.

•Our business is subject to climate change-related transitional risks and physical risks that could significantly increase our operating expenses and capital costs, adversely affect our customers’ development plans, and reduce demand for our products and services.

•We face and will continue to face opposition to and negative public perception regarding the development of our expansion projects and the operation of our pipelines and facilities from various groups.

•Our subsidiaries' significant indebtedness, and any future indebtedness, as well as the restrictions under our subsidiaries' debt agreements, could adversely affect us.

•We may be unable to obtain financing on satisfactory terms and any financing transactions may increase our financial leverage or cause dilution to our shareholders. A further downgrade of EQM’s credit ratings, including in connection with the MVP project or customer credit ratings changes, could impact our liquidity, access to capital, and costs of doing business.

•Increased competition from other companies that provide gathering, transmission and storage, and water services, or from alternative fuel or energy sources, could have a negative impact on customer throughput and the demand for our services and could limit our ability to grow.

•We are exposed to the credit risk of our counterparties in the ordinary course of our business.

•We may not be able to realize the expected investment return under certain of our existing contracts, or renew or replace expiring contracts at favorable rates, on a long-term basis or at all.

•The ongoing outbreak of COVID-19 and its variant strains (or any future pandemic) could harm our business, results of operations and financial condition.

•Third-party pipelines and other facilities interconnected to our pipelines and facilities may become unavailable to transport or process natural gas.

•Joint ventures that we have entered into (or may in the future enter into) might restrict our operational and corporate flexibility and divert our management’s time and our resources. We do not exercise control over our joint venture partners, and it may be difficult or impossible for us to cause these joint ventures to take actions that we believe would be in our or the joint venture’s best interests.

•Acquisitions that we may make could reduce, rather than increase, our results of operations and liquidity, and adversely affect our ability to pay dividends to our shareholders.

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•Expanding our business by constructing new midstream assets subjects us to risk, and we do not insure against all potential losses and could be seriously harmed by unexpected liabilities.

•Significant portions of our pipeline systems have been in service for several decades, and we are subject to numerous hazards and operational risks. We do not own all of the land on which our assets are located, which could disrupt our operations and future development.

•The loss or disengagement of key personnel could adversely affect our ability to execute our plans.

•Our exposure to direct commodity price risk may increase in the future.

Legal and Regulatory Risk

•Our natural gas gathering, transmission and storage services are subject to extensive regulation. Changes in or additional regulatory measures, and related litigation, could have a material adverse effect on us.

•We may incur significant costs and liabilities as a result of adverse events and increased maintenance or repair expenses and downtime or as a result of increasingly stringent pipeline safety regulation.

Risks Related to an Investment in Us

•For the taxable years prior to January 1, 2021, the tax treatment of EQM depended on its status as a partnership for U.S. federal income tax purposes. If the IRS were to treat EQM as a corporation or if EQM becomes subject to additional amounts of entity-level taxation, it would reduce the amount of cash we have available to pay dividends to our shareholders.

•We face certain risks related to the tax treatment of EQM and any potential audit adjustment to EQM's income tax returns for tax years beginning after 2017.

•Our stock price has fluctuated and may further fluctuate significantly and your percentage of ownership in us may be diluted in the future.

•We cannot guarantee the timing, amount or payment of dividends on our common stock.

•Anti-takeover provisions contained in our governing documents and Pennsylvania law could impair an attempt to acquire us and our exclusive forum provision in our governing documents could discourage lawsuits against us and our directors and officers.

•Equitrans Midstream Preferred Shares issued as part of the EQM Merger and the related Restructuring present a number of risks to current and future holders of our common stock.

Risks Related to the Separation

•We continue to face risks related to the Separation, including among others, those related to U.S. federal income taxes, contingent liabilities allocated to us following the Separation, EQT's obligations under certain Separation-related agreements and potential indemnification liabilities.

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Risk Factors

Risks Related to Our Operations

We depend on EQT for a substantial majority of our revenues. Therefore, we are subject to the business and liquidity risks of EQT, and any decrease in EQT's drilling or completion activity (or significant production curtailments) could adversely affect our business and operating results.

Historically, we have provided EQT a substantial percentage of its natural gas gathering, transmission and water services. EQT accounted for approximately 59% of our revenues for the year ended December 31, 2021. We expect to derive a substantial majority of our revenues from EQT for the foreseeable future, including as a result of the EQT Global GGA.

Given the scope of our business relationship with EQT, any event, whether in our areas of operations or otherwise, that adversely affects EQT's production, financial condition, leverage, results of operations or cash flows may adversely affect us. Accordingly, we are subject to the business risks of EQT, including the following:

•prevailing and projected commodity prices, primarily natural gas and natural gas liquids (NGLs);

•natural gas price volatility or a sustained period of low commodity prices, and EQT’s utilization of financial hedges, which may have an adverse effect on, as applicable, EQT’s drilling operations, revenue, profitability, future rate of growth, creditworthiness and liquidity;

•decisions of EQT’s management in respect of curtailing natural gas production, choke management, timing of turning wells in line, and rig and completion activity;

•a reduction in or slowing of EQT’s anticipated drilling and production schedule, which would directly and adversely impact demand for our services;

•the proximity, capacity, cost and availability of gathering and transportation facilities, and other factors that result in differentials to benchmark prices;

•the availability and cost of capital to fund EQT’s operations and any changes in EQT’s credit ratings and the effects of EQT’s credit support obligations on such availability;

•the costs of producing natural gas and the availability and costs of drilling rigs and crews and other equipment;

•infrastructure capacity constraints and interruptions;

•geologic considerations;

•risks associated with the operation of EQT’s wells and facilities, including potential environmental liabilities;

•EQT’s ability to identify exploration, development and production opportunities based on market conditions;

•uncertainties inherent in projecting future rates of production, levels of reserves, and demand for natural gas, NGLs and oil;

•EQT’s ability to develop additional reserves that are economically recoverable, to optimize existing well production and to sustain production, including by use of large-scale, sequential, highly choreographed drilling and hydraulic fracturing, including combo and return-to-pad development;

•EQT’s ability or intention to develop additional reserves not covered by our assets or obligations to build;

•EQT’s ability to achieve anticipated efficiencies associated with its strategic plan, execute on additional strategic transactions, if any, and continue to execute on its de-levering plan;

•adverse effects of governmental and environmental regulation, including the availability of drilling permits, the regulation of hydraulic fracturing (including limitations in respect of engaging in hydraulic fracturing in specific areas), the potential removal of certain federal income tax deductions with respect to natural gas and oil exploration and development or additional state taxes on natural gas extraction, changes in tax laws and negative public perception regarding EQT’s operations;

•the loss of key personnel and/or the effectiveness of their replacements;

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•EQT’s ability to achieve its ESG and sustainability targets; and

•risks associated with cybersecurity, environmental activists and other threats.

EQT may reduce its capital spending in the future based on various factors, including corporate capital allocation strategies, regional takeaway constraints, commodity prices or other factors. Unless we are successful in attracting significant new customers, our ability to maintain or increase the capacity subscribed and volumes transported or gathered under service arrangements on our gathering, transmission and storage and water systems will depend on receiving consistent or increasing commitments from EQT. While EQT has dedicated a significant amount of its acreage to us, and executed long-term contracts with substantial firm reservation and MVCs on our systems, it may determine in the future that drilling in areas outside of our current areas of operations is strategically more attractive to it, and other than the firm reservations and MVCs, it is under no contractual obligation to maintain its production dedicated to us. Moreover, as disclosed on December 13, 2021, EQT’s corporate capital allocation strategy continues to focus on capital efficiency, reducing indebtedness to achieve investment grade metrics, returning capital to its shareholders and free cash flow generation as opposed to volume growth. A reduction in the capacity subscribed or volumes transported or gathered on our systems by EQT (or sustained lack of growth in respect of such volumes) could have a material adverse effect on our business, financial condition, results of operations, liquidity and our ability to pay dividends to our shareholders.

As discussed under the heading "Decreases in production of natural gas in our areas of operation, whether as a result of producer corporate capital allocation strategies, lower regional natural gas prices, regional takeaway constraints, and/or other factors, have adversely affected, and in the future could adversely affect, our business and operating results and reduce our cash available to pay cash dividends to our shareholders." in Part I, "Item 1A. Risk Factors" of this Annual Report on Form 10-K, there are a number of factors that could cause EQT and other producers to elect to reduce or maintain then-current levels of drilling activity or curtail production. Any sustained reductions in development or production activity in our areas of operation, particularly from EQT, could adversely affect our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Additionally, the execution of the EQT Global GGA was based upon assumptions, including regarding EQT’s forecasted drilling and production levels and volumes on our system, that our management believed appropriate at the time of execution. If any of the assumptions fail to be realized or actual results differ from those assumptions, as has occurred in respect of, for example, the targeted full in-service date for the MVP, our ability to fully achieve the benefits we believed associated with the EQT Global GGA at the time of its execution, as well as our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders, may be adversely affected. Further, if EQT's volumetric volumes on our systems do not meet levels we assumed at the time of executing the EQT Global GGA and, during the period of such lower volumes, gathering fee reductions take effect in connection with the full in-service date of the MVP as required under the EQT Global GGA, our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders may be adversely affected. See “EQT Global GGA” in Note 6 to the consolidated financial statements for additional information.

Decreases in production of natural gas in our areas of operation, whether as a result of producer corporate capital allocation strategies, lower regional natural gas prices, regional takeaway constraints, and/or other factors, have adversely affected, and in the future could adversely affect, our business and operating results and reduce our cash available to pay cash dividends to our shareholders.

Our business is dependent on continued natural gas production and the availability and development of reserves in our areas of operation and the production and development plans of our customers are impacted by various factors, including prices for natural gas and NGLs, which fluctuate, corporate capital allocation strategies, and regional takeaway constraints.

Prices for natural gas and NGLs, including regional basis differentials, have previously adversely affected, and may in the future adversely affect, the timing of development of additional reserves and production that is accessible by our pipeline and storage assets, which also negatively affects our water services business, and the creditworthiness of our customers. Lower natural gas prices, particularly in the Appalachian region, have in the past caused, and may in the future cause, certain producers, including certain of our customers, to determine to reduce or hold generally steady their rig count (and thereby delay or not increase production), delay turning wells in line, temporarily shut in portions of their production or otherwise take actions to slow production growth and/or reduce production, which when effected by our producer customers reduces the demand for, and usage of, our services. For instance, temporary production curtailments effected in 2020 by EQT and certain other of our customers resulted in a decrease in our volumetric-based fee revenues for portions of 2020. An extended period of low natural gas prices and/or instability in natural gas prices in future periods, especially in the Appalachian region, or other factors could cause EQT or other producers to take similar actions in the future, which could have a significant negative effect on the demand for our services, and therefore our results of operations.

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Additionally, although natural gas prices have increased from 2020 lows as of the filing date of this Annual Report on Form 10-K, higher natural gas prices have not caused our largest customers to increase their production forecasts and, even if natural gas prices remain elevated, our customers may announce in the future lower, flat or modest increases to production forecasts based on various factors, which could include regional takeaway capacity limitations, access to capital, investor expectations regarding free cash flow, a desire to reduce or refinance leverage or other factors. See, for example, “We depend on EQT for a substantial majority of our revenues. Therefore, we are subject to the business and liquidity risks of EQT, and any decrease in EQT’s drilling or completion activity (or significant production curtailments) could adversely affect our business and operating results.” in Part I, "Item 1A. Risk Factors" of this Annual Report on Form 10-K. Such decisions by our customers affect production levels and, accordingly, demand for our services and therefore our results of operations. Additionally, lower regional natural gas prices (including regionally), corporate capital allocation strategies or regional takeaway constraints could cause producers to determine in the future that drilling activities in areas outside of our current areas of operation are strategically more attractive to them. Further reduction, or continued lack of growth, in the natural gas volumes supplied by our producer customers could result in reduced throughput on our systems and adversely impact our business, including our ability to pay dividends to our shareholders.

Accordingly, maintaining or increasing the contracted capacity or the volume of natural gas gathered, transported and stored on our systems and cash flows associated therewith is substantially dependent on our customers continually accessing additional reserves of natural gas in or accessible to our current areas of operations. For example, while EQT has dedicated production from a substantial portion of its leased properties to us, we have no control over the level of drilling activity in our areas of operation, the amount of reserves associated with wells connected to our gathering and transmission systems or the rate at which production from a well naturally declines over time. EQT and other producers may not develop the acreage they have dedicated to us for a variety of reasons, including, among other things, the availability and cost of capital, corporate capital allocation policies, producers’ focus on generating free cash flow and/or de-levering, prevailing and projected energy prices, hedging strategies and environmental or other governmental regulations. Our ability to obtain non-dedicated sources of natural gas is affected by the level of successful drilling activity near our systems and our ability to compete for volumes from successful new wells, and most development areas in our areas of operation are already dedicated to us or one of our competitors.

In addition, the amount of natural gas reserves underlying wells may also be less than anticipated, and the rate at which production from these reserves declines may be greater than anticipated. We do not obtain independent evaluations of natural gas reserves connected to our systems. Accordingly, we do not have independent estimates of total reserves connected to our systems or the anticipated life of such reserves. If the total reserves or estimated life of the reserves connected to our systems are less than we anticipate, or the timeline for the development of reserves is longer than we anticipate, and we are unable to secure additional sources of natural gas, there could be a material adverse effect on our business, results of operations, financial condition, liquidity and ability to pay dividends to our shareholders.

If new supplies of natural gas are not obtained to replace the natural decline in volumes from existing supply basins in our areas of operation, the overall volume of natural gas gathered, transported and stored on our systems would decline, which could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

The regulatory approval process for the construction of new midstream assets is very challenging, has significantly increased costs and delayed targeted in-service dates, and decisions by regulatory and judicial authorities in pending or potential proceedings are likely to impact our or the MVP Joint Venture’s ability to obtain or maintain in effect all approvals and authorizations necessary to complete certain projects on the targeted time frame or at all or our ability to achieve the expected investment returns on the projects.

Certain of our projects require regulatory approval from federal, state and/or local authorities prior to and/or in the course of construction, including any extensions from, expansions of or additions to our and the MVP Joint Venture’s gathering, transmission and storage systems, as applicable. The approval process for certain projects has become increasingly slower and more difficult, due in part to federal, state and local concerns related to exploration and production, transmission and gathering activities and associated environmental impacts, and the increasingly negative public perception regarding the oil and gas industry, including major pipeline projects like the MVP and MVP Southgate. Further, regulatory approvals and authorizations, even when obtained, have increasingly been subject to judicial challenge by activists requesting that issued approvals and authorizations be stayed and vacated.

Accordingly, authorizations needed for our projects, including the MVP and MVP Southgate projects, may not be granted or, if granted, such authorizations may include burdensome or expensive conditions or may later be stayed or revoked or vacated, as has been the case with certain authorizations in the past, including, most recently, in January and February 2022 with respect to certain approvals for the MVP project that the Fourth Circuit vacated.

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In addition, significant delays in the regulatory approval process for projects, as well as stays and losses of critical authorizations and permits, including for the MVP and MVP Southgate projects, have significantly increased costs and delayed the targeted in-service dates for the projects, and further delays may cause similar adverse effects. Significant delays, such as that caused by the vacatur in January and February 2022 of certain approvals for the MVP project by the Fourth Circuit, and cost increases in turn could adversely affect our ability, and, in the case of the MVP and MVP Southgate projects, the ability for the MVP Joint Venture and its owners, including us, to achieve expected investment returns, adversely affect our willingness or ability and/or that of our joint venture partners to continue to pursue projects, and/or further cause other-than-temporary declines in value to the Company's equity investment in the MVP Joint Venture. The MVP and MVP Southgate projects in particular are subject to several agency actions and judicial challenges (and will likely become subject to further actions and challenges), as described in more detail in “Item 3. Legal Proceedings” and "Strategy" under "Developments, Market Trends and Competitive Conditions" in “Item 1. Business.”

There is no guarantee that the MVP Joint Venture will ultimately (or timely) receive all necessary authorizations or that such authorizations will be maintained in effect following challenge, or even after projects are placed in service. Even if the MVP Joint Venture does succeed in resolving challenges or restoring or obtaining the necessary permits and other authorizations, this may not occur within the MVP Joint Venture’s then-targeted time frame for placing projects in service, prior to placing projects in service, or enable the MVP Joint Venture to meet the then-targeted project costs.

We have experienced and may further experience increased opposition from activists in the form of lawsuits, intervention in regulatory proceedings and otherwise, which has been and/or may be focused on the few remaining portions of the MVP project and which have resulted in significant, adverse decisions in respect of project authorizations. Such opposition has made it increasingly difficult to complete the project and place it in service within the then-targeted time frame or at all and, following any in-service, may also affect the ability to continue operating or effect extensions and/or expansions of the project. Further, such opposition and/or adverse court rulings and regulatory determinations may have the effect of increasing that risk that at a future point joint venture partners may elect not to continue to pursue or fund the project, which would, absent additional project sponsors, significantly imperil the ability to complete the project. See "We have entered into joint ventures, and may in the future enter into additional or modify existing joint ventures, that might restrict our operational and corporate flexibility and divert our management's time and our resources. In addition, we exercise no control over joint venture partners and it may be difficult or impossible for us to cause these joint ventures to take actions that we believe would be in our or the joint venture's best interest and these joint ventures are subject to many of the same operational risks to which we are subject." in Part I, "Item 1A. Risk Factors" of this Annual Report on Form 10-K. We also expect that other projects, such as the MVP Southgate, may be subject to similar heightened opposition. These and other challenges to our projects, particularly the MVP project, could adversely affect our business (including by increasing the possibility of investor activism), financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

The gathering fees payable by EQT to us set forth in the EQT Global GGA are subject to potential reductions for certain contract years set forth in the EQT Global GGA, conditioned to begin the first day of the quarter in which the full in-service date of the MVP occurs, which provide for estimated aggregate fee relief of approximately $270 million in the first twelve-month period, approximately $230 million in the second twelve-month period and approximately $35 million in the third twelve-month period. In addition, given that the MVP full in-service date did not occur by January 1, 2022, EQT has an option, exercisable through December 31, 2022, to forgo approximately $145 million of the gathering fee relief in such first twelve-month period and approximately $90 million of the gathering fee relief in such second twelve-month period in exchange for the EQT Cash Option. Among the benefits to us pursuant to the EQT Global GGA, EQT is subject to an initial annual MVC of 3.0 Bcf per day that became effective on April 1, 2020, which annual MVC gradually steps up to 4.0 Bcf per day through December 2031 following the full in-service date of the MVP. Delays in the MVP full in-service date affect our ability to achieve benefits associated with the execution of the EQT Global GGA. See “EQT Global GGA” in Note 6 to the consolidated financial statements for additional information.

Reviews of our goodwill, intangible and other long-lived assets and equity method investment in the MVP Joint Venture have resulted in significant impairment charges, and reviews of our goodwill, intangible and other long-lived assets and equity method investment in the MVP Joint Venture could result in future significant impairment charges.

GAAP requires us to perform an assessment of goodwill at the reporting unit level for impairment at least annually and whenever events or changes in circumstances indicate that the fair value of a reporting unit is more likely than not less than its carrying amount.

We may perform either a qualitative or quantitative assessment of potential impairment. Our qualitative assessment of potential impairment may result in the determination that a quantitative impairment analysis is not necessary. Under this elective process, we assess qualitative factors to determine whether the existence of events or circumstances leads us to determine that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If after assessing the totality of events or

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circumstances, we determine that it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then performing a quantitative analysis is not required. However, if we conclude otherwise, then we perform a quantitative impairment analysis. If we choose not to perform a qualitative assessment, or if we choose to perform a qualitative assessment but are unable to qualitatively conclude that no impairment has occurred, then we will perform a quantitative assessment. In the case of a quantitative assessment, we estimate the fair value of the reporting unit with which the goodwill is associated and compare it to the carrying value. If the estimated fair value of a reporting unit is less than its carrying value, an impairment charge to goodwill is recognized for the excess of the reporting unit’s carrying value over its fair value.

Assessing goodwill for potential impairment requires significant judgments and estimates by management. Fair value of the reporting unit to which goodwill is recorded is estimated using a combination of an income and market approach which, in the case of the income approach, applies significant inputs not observable in the public market (Level 3), including estimates and assumptions related to the use of an appropriate discount rate, future throughput volumes, the application of contractual terms providing for fee credit as necessary, operating costs, capital spending and changes in working capital, and, in the case of the market approach, applies metrics and multiples derived from comparable companies and reference transactions. The reporting unit to which goodwill is recorded as of December 31, 2021 is the EQM Opco reporting unit (as defined and discussed in Note 4). See Note 4 to the consolidated financial statements for additional information on our reporting units and impairment previously recognized.

We evaluate long-lived assets and equity method investments for impairment when events or changes in circumstances indicate, in management’s judgment, that the carrying value of such assets may not be recoverable (meaning, in the case of equity method investments, that such investments have suffered other-than-temporary declines in value). With respect to property, plant and equipment and finite lived assets, asset recoverability is measured by comparing the carrying value of the asset or asset group with its expected future pre-tax undiscounted cash flows. These cash flow estimates require us to make projections and assumptions for many years into the future for pricing, demand, competition, operating cost, commencement of operations, resolution of relevant legal and regulatory matters, and other factors. If the carrying amount exceeds the expected future undiscounted cash flows, we recognize an impairment equal to the excess of carrying value over fair value as determined by quoted market prices in active markets or present value techniques if quotes are unavailable. The determination of the fair value using present value techniques requires us to make projections and assumptions regarding the probability of a range of outcomes and the rates of interest used in the present value calculations. Any changes we make to these projections and assumptions could result in significant revisions to evaluations of recoverability and the recognition of additional impairments. The evaluation and measurement of impairments for equity method investments involves similar uncertainties, judgments and estimates as those applicable to other long-lived assets. If the equity method investment carrying value exceeds the fair value and it is determined that the decline in value is other-than-temporary, we will recognize an impairment equal to the excess of the carrying value over fair value. The fair value of equity method investments is generally estimated using an income approach under which significant judgments and assumptions include expected future cash flows, the appropriate discount rate and probability-weighted scenarios.

Estimates and assumptions used in reviews of our goodwill, intangible and other long-lived assets and equity method investments are inherently subjective, subject to significant business, economic, competitive, regulatory, judicial and other risks, and require complex judgments. If actual results differ from the estimates or if assumptions are not realized (or if estimates or assumptions, such as of the probability of success of the projects to which an equity method investment relates, change), we may be required to recognize an impairment.

As of December 31, 2021, we had approximately $486.7 million of goodwill (all associated with the EQM Opco reporting unit) and $9.7 billion of other long-lived assets, which will be monitored for future impairment.

If the operations or projected operating results of our businesses decline, we could incur additional goodwill, intangible asset, and property, plant and equipment impairment charges. Further, if we determine that the carrying value of long-lived assets is not recoverable or the value associated with our equity method investment in the MVP Joint Venture has further suffered an other-than-temporary decline, we would also incur additional impairment charges. Future impairment charges could be significant and could have a material adverse impact on our financial condition and results of operations for the period in which the impairment is recorded. As of the filing of this Annual Report on Form 10-K, we cannot predict the likelihood or magnitude of any future impairment.

See Note 4 to the consolidated financial statements and “Outlook—Potential Future Impairments” in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” for additional information.

Cyberattacks aimed at us or third parties, as well as any noncompliance by us with applicable laws and regulations governing cybersecurity and/or data privacy, could materially adversely affect us.

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We have become increasingly dependent upon digital technologies, including information systems, infrastructure, and cloud applications, to conduct our business, and the maintenance of our financial and other records has long been dependent upon such technologies. We depend on both our own systems, networks, and technology as well as the systems, networks and technology of our vendors, customers and other business partners. Our increasing reliance on digital technologies puts us at greater risk for system failures, disruptions, incidents, and cyberattacks, which could significantly impair our ability to conduct our business. For instance, energy industry participants, including midstream companies, have been the victims of ransomware attacks, and we expect to continue to be targeted by cyberattacks as a critical infrastructure company.

The U.S. government has continued to issue public warnings that indicate that energy assets might be specific targets of cyberattacks, and in May and July 2021, the TSA issued security directives (and subsequent amendments/revisions thereto) applicable to certain midstream companies requiring such companies to comply with mandatory reporting measures and undertake a number of specific cybersecurity enhancements for both IT and OT systems. We have been required and may further be required to expend additional resources as a result of current or new laws, regulations, directives or other requirements related to critical infrastructure cybersecurity. Any failure to remain in compliance with laws or regulations governing cybersecurity, including the TSA security directives, may result in penalties, fines, enforcement actions, or mandated changes in our practices, which may have a material adverse effect on our business and operations.

While we and our third-party service providers commit resources to the design, implementation and monitoring of our IT and OT systems, there is no guarantee that our cybersecurity measures will provide absolute security. Despite these measures, we may not be able to anticipate, detect or prevent all cyberattacks or incidents, particularly because the methodologies used by attackers change frequently or may not be recognized until launched, and because attackers are increasingly using tactics, techniques, and procedures designed to circumvent controls and avoid detection. As a result, our IT and OT systems (or those of third parties) that are designed to protect against cyber risks may not prevent or detect all cyberattacks or incidents, and deliberate attacks on, or unintentional events or incidents affecting, our systems or infrastructure or the systems or infrastructure of third parties could, depending on the extent or duration of the event, materially adversely affect us, including by leading to corruption, misappropriation or loss of our proprietary and sensitive data, delays (which could be significant) in the performance of services for our customers, difficulty in completing and settling transactions, challenges in maintaining our books and records, communication interruptions, environmental damage, regulatory scrutiny, personal injury or death, property damage and other operational disruptions, as well as damage to our reputation, financial condition and cash flows and potential legal claims and liabilities. Like other companies in the natural gas industry, we have identified and expect to continue to identify cyberattacks and incidents on our systems, but none of the cyberattacks and incidents we have identified to date has had a material impact on our business or operations.

Further, as cyberattacks continue to evolve and increase in sophistication and volume, we have expended, and expect to continue to expend, additional resources relating to cybersecurity, including, as applicable, to continue to modify or enhance our preventive, protective, and response measures and/or to investigate and remediate potential vulnerabilities to or consequences of cyberattacks and incidents. There can be no assurance that any preventive, protective, response, or remedial measures will address or mitigate all threats that arise.

The regulatory landscape with regard to data privacy continues to develop. New laws and regulations governing data privacy, as well as any unauthorized disclosure of personal information, may potentially increase our compliance costs. Any failure by us, a company that we acquire, or one of our technology service providers, to comply with these laws and regulations, where applicable, could adversely affect us, including by resulting in reputational harm, penalties, regulatory scrutiny, liabilities, legal claims and/or mandated changes in our business practices.

Increasing scrutiny and changing stakeholder expectations in respect of ESG and sustainability practices may adversely impact our business and our stock price and expose us to new or additional risks.

Companies across all industries are facing increasing scrutiny from stakeholders related to their ESG and sustainability practices. Investor advocacy groups, proxy advisory firms, certain institutional investors and lenders, investment funds and other influential investors and rating agencies are also increasingly focused on ESG and sustainability practices and matters and on the implications and social cost of their investments and loans. Stakeholders’ increased focus and activism related to ESG and sustainability matters may potentially adversely affect our business, financial condition, results of operations, and liquidity, as well as our stock price, and expose us to new or additional risks, including as described below.

Increased focus on ESG and sustainability matters, particularly with respect to climate change and related demand for renewable and alternative energy, may, among other things, hinder our access to capital given our fossil fuel-based operations and/or adversely affect demand for our services. See “Our business is subject to climate change-related transitional risks (including evolving climate-focused regulation and climate change-driven trends emphasizing financing non-fossil fuel businesses and prompting pursuit of emissions reductions, lower-carbon technologies and alternative forms of energy) and

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physical risks that could significantly increase our operating expenses and capital costs, adversely affect our customers’ development plans, and reduce demand for our products and services.” and “Increased competition from other companies that provide gathering, transmission and storage, and water services, or from alternative fuel or energy sources, could negatively impact demand for our services, which could adversely affect our financial results.” under "Item 1A. Risk Factors" in this Annual Report on Form 10-K for the year ended December 31, 2021. Additionally, pipeline infrastructure companies and projects, such as our MVP project, face increased legal scrutiny and risk, including litigation risk and enhanced and lengthier regulatory reviews by federal, state and/or environmental regulators, due to an increased focus on climate change and/or environmental justice policies and the fossil fuel industry.

We recognize that our shareholders, employees, customers, regulators, and other stakeholders expect us to continue to focus on long-term sustainable performance, including by addressing significant, relevant ESG factors, further working to prioritize sustainable energy practices, reducing our carbon footprint and promoting sustainability. We have incurred and expect to continue to incur costs and capital expenditures in doing so, and certain of such future costs and capital expenditures could be material. Further, if we do not adapt to or comply with investor or other stakeholder expectations and standards (or meet sustainability targets that we set), which are evolving, or if we are perceived not to have responded appropriately or quickly enough to growing concern for ESG and sustainability issues even if our actions are regulatorily and legally compliant, our business could suffer, including from reputational damage (and negative public perception regarding us or our industry may lead to additional regulatory scrutiny or other adverse developments). Additionally, activist shareholders may submit proposals to promote an ESG-related position. Responding to proxy contests and other actions by activist shareholders can be costly and time-consuming, disrupting our operations, causing reputational harm, and diverting the attention of our Board and senior management from the pursuit of business strategies.

In addition, as we continue to focus on long-term sustainable performance and address ESG factors, and as disclosure standards continue to evolve, including as a result of potential regulatory initiatives, we have expanded and expect to further expand our public disclosures in these areas. Such disclosures may reflect aspirational goals, targets, cost estimates and other expectations and assumptions, including over long timelines, which aspirational goals, targets, cost estimates, and other expectations and assumptions are necessarily uncertain and may not be realized. Failure to realize (or timely achieve progress on) such aspirational goals, targets, cost estimates, and other expectations or assumptions may adversely impact us. Further, a multitude of organizations that provide information to investors have developed ratings processes for evaluating companies on their approach to ESG and sustainability matters. Such ratings and reports are used by some investors to inform their investment and voting decisions. Unfavorable ESG ratings, or perceptions of us or our industry as a result of such ratings or our ESG and sustainability practices, may lead to increased negative investor and other stakeholder sentiment toward us or our customers, and to the allocation of investment capital to other industries and companies, which could negatively affect our stock price and access to and costs of capital.

The occurrence of any of the foregoing may adversely affect our business, financial condition, results of operations, liquidity and/or our stock price.

Our business is subject to climate change-related transitional risks (including evolving climate-focused regulation and climate change-driven trends emphasizing financing non-fossil fuel businesses and prompting pursuit of emissions reductions, lower-carbon technologies and alternative forms of energy) and physical risks that could significantly increase our operating expenses and capital costs, adversely affect our customers’ development plans, and reduce demand for our products and services.

Combating the effects of climate change continues to attract considerable attention in the United States and internationally, including from regulators, legislators, companies in a variety of industries, financial market participants and other stakeholders. Numerous proposals have been made and will likely continue to be made to monitor and limit existing emissions of GHGs, as well as to restrict or eliminate future emissions. Accordingly, our business and operations, and those of our producer customers, are subject to executive, regulatory, political, litigation, and financial risks associated with natural gas and the emission of GHGs.

While no comprehensive climate change legislation has been enacted at the federal level in the United States as of the filing of this Annual Report on Form 10-K for the year ended December 31, 2021, President Biden has made addressing climate change a priority of his administration, including by issuing in January 2021 an executive order recommitting the United States to the United-Nations-sponsored “Paris Agreement” (an international agreement for nations to limit GHG emissions) and announcing in April 2021 that the United States will target a 50-52% reduction in economy-wide GHG emissions by 2030 relative to 2005 levels. Accordingly, future federal GHG regulations of the oil and gas industry and legislation relating to climate change are likely. Moreover, federal regulators have taken (or announced that they plan to take or are contemplating) actions related to GHG regulations that have or may have a significant influence on our operations, including the EPA’s November 2021 proposed rule to regulate methane emissions from oil and natural gas sources and the FERC's ongoing evaluation of how to

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treat GHGs for purposes of its environmental and certificate reviews. For additional information on GHG laws, regulations and other legal requirements applicable to us, see "Regulatory Environment" and "Environmental Matters" under "Item 1. Business."

The U.S. Congress, regulatory bodies and various states also have been evaluating and/or have implemented climate-related legislation and other regulatory initiatives that would further restrict emissions of GHGs, including the establishment of market-based cap-and-trade or carbon pricing programs or imposition of fees or taxes based on the emission of GHGs by certain facilities. For example, certain Northeastern and Mid-Atlantic states in which we and/or the MVP Joint Venture operate, participate, and others are considering participating, in the Regional Greenhouse Gas Initiative agreement (RGGI) aimed at reducing carbon dioxide emissions from power plants, which could in turn lead to increased uncertainty with regard to demand for natural gas used in the generation of electricity.

Pennsylvania, which is home to our headquarters and many of our assets, approved Environmental Quality Board Final Rulemaking #7-599: CO2 Budget Trading Program (“RGGI Rules”) on September 1, 2021. This rulemaking would establish a cap on carbon dioxide emissions from fossil fuel plants and would authorize Pennsylvania to participate in RGGI. The RGGI Rules will not become effective until they are published by Pennsylvania’s Legislative Reference Bureau (“LRB”). Under Pennsylvania’s Regulatory Review Act, the LRB must provide the General Assembly time to review and reject the rulemaking before publishing the final rules. The Pennsylvania Senate and House passed concurrent resolutions disapproving the implementation of the RGGI Rules. However the Pennsylvania Governor vetoed those resolutions on January 10, 2022, leaving the Pennsylvania General Assembly with the opportunity to override that veto. The ongoing legislative review process means that the final RGGI Rules may not be promulgated until the second quarter of 2022, at the earliest. Additionally, it is anticipated that the RGGI Rules, if promulgated, will face legal challenges, which cast further uncertainty over the timing and implementation of the RGGI Rules.

Beyond Pennsylvania, it is likely that such regional and state efforts will continue and may establish additional requirements in states in which our assets are located regardless of federal action. For example, with respect to the footprints of MVP and MVP Southgate projects, North Carolina is considering rulemaking to join RGGI and Virginia currently is a member of RGGI. Virginia's recently elected governor, however, has issued an executive order calling on the state to begin the process of withdrawing from RGGI and rescinding its RGGI regulations. GHG restrictions, if implemented, may result in additional compliance obligations or taxes, and initiatives such as RGGI may adversely affect demand for natural gas and, therefore, negatively impact our producer customers, and in turn, the demand for our services. Any of these outcomes could have an adverse effect on our business, financial condition, results of operations, liquidity or ability to pay dividends to our shareholders.

There remains considerable uncertainty surrounding the timing, scope and potential impact of future action in the United States and internationally with respect to GHG emissions, including methane in particular. Although we continue to monitor legislative, regulatory and judicial developments in this area to assess potential impacts on our operations and otherwise take efforts and invest funds proactively to limit and reduce GHG emissions from our facilities, we cannot predict precisely what form future laws, regulations and legal requirements relating to climate change might take. Nor can we predict the stringency of any such requirements, when they might become effective or their exact effect on us. Further, laws, regulations and other legal requirements relating to climate change are constantly changing or being reinterpreted, and this may occur during the permitting and construction phases of our projects (which may last several years), as has been the case with our MVP and MVP Southgate projects. Generally, development and implementation of processes to comply with changing legal requirements is likely to be costly and time consuming. Further, compliance or noncompliance with existing or new climate change-focused regulations or other initiatives could adversely impact us by, among other things, imposing additional compliance obligations such as new emission control requirements, taxing the release of GHGs, causing longer permitting timelines, requiring that we purchase allowances for emissions, exposing us to regulatory penalties or affecting our reputation. Future laws, regulations and legal requirements designed to reduce GHG emissions also could make some of our activities, or those of our customers, uneconomic or less economically advantageous to maintain or operate, which may affect the estimated fair values of underlying assets and results of operations. Further, such future legislation and/or regulation may reduce the number of attractive business opportunities available to us. Additionally, climate change-focused regulations may adversely affect production of or demand for natural gas (such as by increasing the cost of producing natural gas or prompting consumers to use renewable fuels), which could have an adverse effect on our business, financial condition, results of operations, liquidity or ability to pay dividends to our shareholders. Although future laws, regulations and legal requirements relating to climate change could have a material impact on our industry and us, attempts at quantification are based on speculation of what may occur in the future. For example, based on several bills proposing the establishment of a carbon tax or carbon pricing that have been drafted across various jurisdictions, our preliminary estimate in 2021 of the potential increase in our operating cost upon the enactment of a carbon tax or carbon pricing ranged from approximately $2 million to approximately $96 million reflecting an assumed cost of carbon range and our estimated metric tons of carbon dioxide equivalent Scope 1 and 2 emissions for 2020. However, these and any

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other estimates we may make taking into account potential future laws, regulation or legal requirements are necessarily uncertain.

Litigation risks relating to climate change also are increasing. Parties have brought suit against the largest oil and natural gas exploration and production companies, alleging, among other things, that such companies created public nuisances by producing fuels that contributed to climate change effects, such as rising sea levels, and therefore are responsible for resultant roadway and infrastructure damages. Parties have also alleged that these companies have been aware of the adverse effects of climate change for some time but defrauded their investors and consumers by failing to adequately disclose those impacts. While we are not currently party to any such litigation, we or our customers could be named in future actions given that our business involves natural gas. Further, climate change-related factors may prompt governmental investigations or adversely affect the regulatory approval process for the construction and operation of midstream assets as, for example, opposition parties have cited our GHG operational emissions as a specific concern during comment periods for regulatory permit reviews.

Market forces driven by concern for climate change are affecting (and are expected to continue to affect) the availability and cost of capital to companies in the fossil fuel sector. For example, climate change activists continue to direct their attention towards, among other things, sources of funding for fossil fuel energy companies, which has resulted in certain financial institutions, funds and other sources of capital restricting or adding more burdensome terms to or altogether eliminating their investments in, or lending with respect to, fossil fuel energy-related activities and companies. Further, such institutions are increasingly allocating funds to those industries and companies perceived as having better growth opportunities and/or stronger ESG metrics and practices. Certain financial institutions, including some that are lenders under the Amended EQM Credit Facility (as defined in Note 11), have voluntarily adopted policies that have the effect of reducing the funding provided to the fossil fuel sector, and there is also a risk that financial institutions will in the future be required to adopt such policies. These market forces may adversely affect our ability to obtain financing in the future (and thus our pursuit of initiatives, such as growth projects) or achieve increases in our stock price, and these forces may also adversely affect our customers, which could result in, among other things, increased counterparty risk and/or decreased demand for our services. Further, demand for and development of lower carbon technologies and renewable and alternative energy is increasing as a result of concern regarding climate change, which may adversely affect demand for natural gas and accordingly our producer customers.

In addition to such transitional risks, climate change also may create physical risks to our business. Climate impacts, such as increasing temperatures, changing weather patterns, and more frequent or intense floods and storms, can pose serious challenges for our facilities, supply chains, employees, contractors, current and potential customers, and the communities in which we operate. In particular, our operations are primarily focused in the Appalachian Basin, which is a rain-susceptible region. Severe and repeated rainfall events above and beyond historical estimates and magnitudes because of climate change could cause damage to our physical assets, especially facilities located in low-lying areas near streams and riverbanks and pipelines situated in landslide-prone and rain susceptible regions, which may adversely affect our operations. We may not be able to pass on resultant higher costs to our customers or recover all costs related to mitigating these physical risks or repairing damage due to such events. Further, our ability to mitigate the adverse impacts of these events depends in part on the resilience of our facilities and the effectiveness of planning for disaster preparedness and response and business continuity, which plans may not fully encompass every potential climate-driven eventuality. Additionally, changing climate patterns could impact the demand for energy in the regions we currently and plan to serve. For example, extreme warm weather in the winter months may lead to decreased natural gas usage, which may affect our results of operations.

One or more of any such developments could have an adverse effect on our business, financial condition, results of operations, liquidity or ability to pay dividends to our shareholders.

Negative public perception regarding us, MVP, MVP Southgate, other of our expansion projects, the midstream industry, and/or the natural gas industry in general have had and could continue to have an adverse effect on our operations and business, and negative public perception may increase the likelihood of governmental initiatives aimed at the natural gas industry.

Negative public perception regarding us, the MVP, MVP Southgate, other of our expansion projects, other industry participants and their projects and actions, the midstream industry and/or the natural gas industry in general resulting from, among other things, climate change, oil or produced water spills, gas and other hydrocarbon leaks, the explosion or location of natural gas transmission and gathering lines and other facilities, erosion and sedimentation issues, unpopular expansion projects, environmental justice concerns, and general concerns raised by activists about hydraulic fracturing and pipeline projects (as well as specific concerns raised in respect of particular pipeline projects), has led to, and may in the future lead to, increased regulatory scrutiny, which may, in turn, lead to new local, state and federal safety and environmental laws, regulations, guidelines, enforcement interpretations and/or adverse judicial rulings or regulatory actions. See the sections captioned "Regulatory Environment" and "Environmental Matters" under "Item 1. Business" as well as “Item 3. Legal Proceedings.” These actions have caused, and may continue to cause, operational delays or restrictions, increased construction and operating

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costs, penalties under construction contracts, additional regulatory burdens and increased litigation. As discussed under “The regulatory approval process for the construction of new midstream assets is very challenging, has significantly increased costs and delayed targeted in-service dates, and decisions by regulatory and judicial authorities in pending or potential proceedings are likely to impact our or the MVP Joint Venture's ability to obtain or maintain in effect all approvals and authorizations necessary to complete certain projects on the targeted time frame or at all or our ability to achieve the expected investment returns on the projects,” there are several pending challenges to certain aspects of the MVP project and the MVP Southgate project that affect the MVP project and the MVP Southgate project, as applicable. Moreover, governmental authorities exercise considerable discretion in the timing and scope of permit issuance and the public may engage in the permitting process, including through intervention in the courts. Negative public perception could further cause the permits we and the MVP Joint Venture need to complete the expansion projects, including the MVP and MVP Southgate projects, and to conduct our and its respective operations to be denied, removed, withheld, delayed, stayed or burdened by requirements that restrict our and its respective abilities to profitably conduct business or make it more difficult to obtain the real property interests needed in order to operate relevant assets or complete planned growth projects, which could, among other adverse effects, affect project completion or subsequent operation, result in revenue loss or a reduction in our and the MVP Joint Venture’s customer bases.

Additionally, there have been initiatives at the federal, state and local levels aimed at the natural gas industry, including those to restrict the use of hydraulic fracturing. Adoption of legislation or regulations (which may be prompted by negative public perception) placing restrictions on hydraulic fracturing activities or other limitations with respect to the natural gas industry could materially adversely affect our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Our subsidiaries’ significant indebtedness, and any future indebtedness, as well as the restrictions under our subsidiaries’ debt agreements, could adversely affect our operating flexibility, business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Our subsidiaries have significant amounts of debt outstanding under the Amended EQM Credit Facility, the 2021 Eureka Credit Facility (as defined in Note 11) and the senior unsecured notes issued by EQM. The respective debt agreements of EQM and Eureka Midstream, LLC (Eureka), a wholly owned subsidiary of Eureka Midstream, contain various covenants and restrictive provisions that limit EQM’s and Eureka’s, as applicable, ability to, among other things:

•incur or guarantee additional debt;

•make distributions on or redeem or repurchase units;

•incur or permit liens on assets;

•enter into certain types of transactions with affiliates;

•enter into burdensome agreements, subject to certain specified exceptions;

•enter into certain mergers or acquisitions; and

•dispose of all or substantially all of their respective assets.

See Note 11 to the consolidated financial statements for a discussion of the Amended EQM Credit Facility and the 2021 Eureka Credit Facility. The Amended EQM Credit Facility contains certain negative covenants, that, among other things, establish for EQM a maximum Consolidated Leverage Ratio (as defined in the Amended EQM Credit Facility) that varies over the course of the term ranging from not more than 5.95 to 1.00 to not more than 5.00 to 1.00, with the then-applicable ratio being tested as of the end of each fiscal quarter (which in limited circumstances may be increased for certain measurement periods following the consummation of certain acquisitions). Under the 2021 Eureka Credit Facility, Eureka is required to maintain a Consolidated Leverage Ratio (as defined in the 2021 Eureka Credit Facility) of not more than 4.75 to 1.00 (or not more than 5.25 to 1.00 for certain measurement periods following the consummation of certain acquisitions). Additionally, as of the end of any fiscal quarter, Eureka may not permit the ratio of Consolidated EBITDA (as defined in the 2021 Eureka Credit Facility) for the four fiscal quarters then ending to Consolidated Interest Charges (as defined in the 2021 Eureka Credit Facility) to be less than 2.50 to 1.00. EQM’s and Eureka’s ability to meet these covenants can be affected by events beyond their respective control and we cannot assure our shareholders that EQM or Eureka will continue to meet these covenants. In addition, the Amended EQM Credit Facility and the 2021 Eureka Credit Facility each contain certain events of default, including the occurrence of a change of control.

The provisions of the debt agreements may affect our ability to obtain future financing and pursue attractive business opportunities and our flexibility in planning for, and reacting to, changes in business conditions. In addition, a failure to comply

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with the provisions of the debt agreements could result in an event of default, which could enable creditors to, subject to the terms and conditions of the applicable agreement, declare any outstanding principal of that debt, together with accrued and unpaid interest, to be immediately due and payable. If the payment of the debt is accelerated, our assets may be insufficient to repay such debt in full, and in turn our shareholders could experience a partial or total loss of their investments. The Amended EQM Credit Facility and the 2021 Eureka Credit Facility each contain a cross default provision that applies to a default related to any other indebtedness the applicable borrower may have with an aggregate principal amount in excess of $25 million as to EQM, and $10 million as to Eureka.

We and our subsidiaries may in the future incur additional debt. Our and our subsidiaries’ levels of debt could have important consequences to us, including the following:

•our ability to obtain additional financing, if necessary, for working capital, capital expenditures, acquisitions or other purposes may be impaired, or such financing may not be available on favorable terms;

•our funds available for operations, future business opportunities and dividends to our shareholders may be reduced by that portion of our cash flow required to make interest payments on our or our subsidiaries’ debt;

•we may be more vulnerable to competitive pressures or a downturn in our business or the economy generally; and

•our flexibility in responding to changing business and economic conditions may be limited.

Our ability to service our subsidiaries’ current, or our or our subsidiaries’ future, respective debts, will depend upon, among other things, our future financial and operating performance, which will be affected by prevailing economic conditions and financial, business, regulatory and other factors, some of which are beyond our control. If our operating results are not sufficient to service our subsidiaries’ current, or our or our subsidiaries’ future, indebtedness, as applicable, or our operating results affect our ability to comply with covenants in our debt agreements, we will be forced to take actions such as seeking modifications to the terms of our debt agreements, reducing dividends, reducing or delaying our business activities, acquisitions, investments or capital expenditures, selling assets or seeking additional equity capital. We may not be able to timely effect any of these actions on satisfactory terms or at all.

Our subsidiaries’ current substantial indebtedness and the additional debt we and/or our subsidiaries will incur in the future for, among other things, working capital, repayment of existing indebtedness, capital expenditures, capital contributions to the MVP Joint Venture, acquisitions or operating activities may adversely affect our liquidity and therefore our ability to pay dividends to our shareholders.

In addition, our subsidiaries’ significant indebtedness may be viewed negatively by credit rating agencies, which could result in increased costs for us to access the capital markets. Any future additional downgrade of the debt issued by EQM could increase our capital costs or adversely affect our operating flexibility or ability to raise capital in the future. See "A further downgrade of EQM's credit ratings, including in connection with the MVP project or customer credit rating changes, which are determined by independent third parties, could impact our liquidity, access to capital, and costs of doing business." in Part I, "Item 1A. Risk Factors" of this Annual Report on Form 10-K.

Additionally, our ability to obtain financing in the future may be adversely affected by market forces driven by concern for climate change. See “Our business is subject to climate change-related transitional risks (including evolving climate-focused regulation and climate change-driven trends emphasizing financing non-fossil fuel businesses and prompting pursuit of emissions reductions, lower-carbon technologies and alternative forms of energy) and physical risks that could significantly increase our operating expenses and capital costs, adversely affect our customers’ development plans, and reduce demand for our products and services.” in Part I, "Item 1A. Risk Factors" of this Annual Report on Form 10-K.

If we or our subsidiaries are unable to obtain needed capital or financing on satisfactory terms, our ability to execute our business strategy and pay dividends to our shareholders may be diminished. Additionally, financing transactions may increase our financial leverage or could cause dilution to our shareholders.

In order to grow and maintain our asset base and complete expansion projects, including the MVP and MVP Southgate projects, we will need to continue to make significant capital expenditures and capital contributions. If we do not make sufficient or effective capital expenditures and capital contributions, we will be unable to grow or maintain our business operations, which impacts our ability to pay dividends to our shareholders.

In order to fund our capital expenditures and capital contributions, as well as potential strategic transactions, if any, we may use cash from our operations, incur borrowings under our subsidiaries’ credit facilities or through debt capital market transactions, enter into our own credit arrangements or sell additional shares of our equity or a portion of our assets. Using cash from operations will reduce the cash we have available to pay dividends to our shareholders. Our and our subsidiaries’ ability to

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obtain or maintain bank financing or to access the capital markets for debt offerings, or our ability to access the capital markets for future equity offerings, may be limited by, among other things, our and our subsidiaries’ financial condition at the time of any such financing or offering, our and our subsidiaries’ credit ratings, as applicable, the covenants in our subsidiaries’ debt agreements, the rights and preferences governing the Equitrans Midstream Preferred Shares, the status of the MVP project, general economic conditions, market conditions in our industry, changes in law (including tax laws), and other contingencies and uncertainties that are beyond our control. Additionally, market forces are affecting (and are expected to continue to affect) the availability and cost of capital to companies in the fossil fuel sector. See “Our business is subject to climate change-related transitional risks (including evolving climate-focused regulation and climate change-driven trends emphasizing financing non-fossil fuel businesses and prompting pursuit of emissions reductions, lower-carbon technologies and alternative forms of energy) and physical risks that could significantly increase our operating expenses and capital costs, adversely affect our customers’ development plans, and reduce demand for our products and services.” in Part I, "Item 1A. Risk Factors" of this Annual Report on Form 10-K.

Even if we or our subsidiaries are successful in obtaining funds through debt or equity financings, as applicable, the terms thereof could limit our ability to pay dividends to our shareholders and otherwise adversely affect us, such as by requiring additional or more restrictive covenants that impose operating and financial restrictions or, in the case of debt, requiring that collateral be posted to secure such debt. In addition, incurring additional debt may significantly increase our interest expense and financial leverage thereby limiting our ability to further borrow, and issuing additional equity may result in significant common shareholder dilution and increase the aggregate amount of cash required to maintain the then-current dividend rates, which could materially decrease our ability to pay dividends at the then-current dividend rates. If funding is not available to us or our subsidiaries when needed, or is available only on unfavorable terms, we may be unable to execute our business plans, complete acquisitions or otherwise take advantage of business opportunities or respond to competitive pressures, any of which (or actions taken to attempt to address any such funding issue) could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

A further downgrade of EQM’s credit ratings, including in connection with the MVP project or customer credit ratings changes, which are determined by independent third parties, could impact our liquidity, access to capital, and costs of doing business.

As of February 23, 2022, EQM’s credit ratings were Ba3 with a negative outlook, BB- with a stable outlook and BB with a negative outlook from Moody’s, S&P and Fitch, respectively. EQM’s credit ratings have fluctuated (and may further fluctuate) depending on, among other things, EQM’s leverage, uncertainty around the full in-service date of the MVP project and the credit profile of our customers.

EQM’s credit ratings are subject to further revision or withdrawal at any time by the assigning rating organization, and each rating should be evaluated independently of any other rating. We cannot ensure that a rating will remain in effect for any given period of time or that a rating will not be lowered or withdrawn entirely by a credit rating agency if, in its judgment, circumstances so warrant, including in connection with the MVP project or the creditworthiness of EQM’s customers. Credit rating agencies perform an independent analysis when assigning credit ratings. This analysis includes a number of criteria such as business composition, market and operational risks, operational risks, various financial tests, ESG matters, as well as analysis of various financial metrics. Credit rating agencies continue to review the criteria for industry sectors and various debt ratings and may make changes to those criteria from time to time.

If any credit rating agency further downgrades or withdraws EQM’s ratings, including for reasons relating to the MVP project (such as for delays in the targeted full in-service date of the MVP project or increases in such project’s targeted costs), EQM’s leverage or credit ratings of our customers, our and our subsidiaries’ respective access to the capital markets could become more challenging, borrowing costs will likely increase, our operating flexibility may be adversely affected, EQM may be required to provide additional credit assurance (the amount of which may be substantial), including the Cash Option Letter of Credit (as discussed in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations"), in support of commercial agreements such as joint venture agreements, and the potential pool of investors and funding sources may decrease.

In order to be considered investment grade, EQM must be rated Baa3 or higher by Moody’s, BBB- or higher by S&P and BBB- or higher by Fitch. EQM’s non-investment grade credit ratings have resulted in greater borrowing costs, including under the Amended EQM Credit Facility, and increased collateral requirements, including under the MVP Joint Venture’s limited liability company agreement, than if EQM’s credit ratings were investment grade.

In addition to causing, among other impacts, higher borrowing costs and/or more restrictive terms associated with modifications to existing debt instruments, any further downgrade could also require additional or more restrictive covenants on future

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indebtedness that impose operating and financial restrictions on us or our subsidiaries, certain of our subsidiaries to guarantee such debt and certain other debt, and certain of our subsidiaries to provide collateral to secure such debt.

Any increase in our financing costs resulting from a credit rating downgrade, and/or more restrictive covenants or the pledging of security, could adversely affect our ability to finance future operations. If a credit rating downgrade and/or a resultant collateral requirement were to occur at a time when we are experiencing significant working capital requirements or otherwise lack liquidity, our business, results of operations, liquidity and ability to pay dividends to our shareholders could be adversely affected.

The lack of diversification of our assets and geographic locations could adversely affect us.

We rely exclusively on revenues generated from our gathering, transmission and storage and water systems, substantially all of which are located in the Appalachian Basin in Pennsylvania, West Virginia and Ohio. Due to our lack of diversification in assets and geographic location and continuing challenges to completing expansion projects such as the MVP and MVP Southgate, an adverse development in these businesses or our areas of operations, including adverse developments due to catastrophic events, pandemics, epidemics, weather, regulatory action, local prices, producer liquidity, decreases in demand for natural gas from the Appalachian Basin or increases in supply of natural gas (such as if associated gas production were to continue to recover and return to or exceed pre-COVID-19 pandemic levels) could have a more significant impact on our business, financial condition, results of operations, liquidity and our ability to pay dividends than if we maintained more diverse assets and locations.

We are exposed to the credit risk of our counterparties in the ordinary course of our business.

We are exposed to the risk of loss resulting from the nonpayment and/or nonperformance of our customers, suppliers, joint venture partners and other counterparties as further described in “Credit Risk” under “Item 7A. Quantitative and Qualitative Disclosure About Market Risk.” We extend credit to our customers as a normal part of our business. While we have established credit policies, including assessing the creditworthiness of our customers as permitted by our FERC-approved natural gas tariffs, and may require appropriate terms or credit support from them based on the results of such assessments, including in the form of prepayments, letters of credit, or guaranties, we may not adequately assess the creditworthiness of our existing or future customers. Pursuant to the EQT Global GGA and the Credit Letter Agreement, amongst other things, (a) we agreed to relieve certain credit posting requirements for EQT, in an amount up to approximately $250 million under its commercial agreements with us, subject to EQT maintaining a minimum credit rating from two of three rating agencies of (i) Ba3 with Moody’s, (ii) BB- with S&P and (iii) BB- with Fitch. As of February 23, 2022, EQT’s public debt had sub-investment grade credit ratings of BB+ with a positive outlook at S&P, Ba1 with a stable outlook at Moody’s, and BB+ with a stable outlook at Fitch. Periods of natural gas price declines and sustained periods of low natural gas and NGL prices, previously have had, and could in the future have, an adverse effect on the creditworthiness of our customers, including their ability to pay firm reservation fees under long-term contracts. For example, the low commodity price environment in 2019 and 2020 negatively impacted natural gas producers causing some producers significant economic stress including, in certain cases, to file for bankruptcy protection or to seek renegotiated contracts. We cannot predict the extent to which the businesses of our counterparties would be impacted if commodity prices decline, commodity prices are depressed for a sustained period of time, or other conditions in the energy industry were to deteriorate, nor can we estimate the impact such conditions would have on the abilities of our customers to perform under their gathering, transmission and storage and water services agreements with us. To the extent one or more of our counterparties is in financial distress or commences bankruptcy proceedings, contracts with these counterparties may be subject to renegotiation or rejection under applicable provisions of the United States Bankruptcy Code (Bankruptcy Code). Nonpayment and/or nonperformance by our counterparties and/or any unfavorable renegotiation or rejection of contracts under the Bankruptcy Code could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Our future growth may be limited if we do not complete expansion projects and/or identify and complete suitable acquisitions and other strategic transactions and realize anticipated benefits therefrom, and we face and will continue to face opposition to the development of our expansion projects and the operation of our pipelines and facilities from various groups, which could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Our ability to grow organically depends primarily upon our ability to complete expansion projects, such as the MVP and MVP Southgate projects (and related expansions thereof), that result in an increase in the cash we generate. We may be unable to complete successful, accretive expansion projects for many reasons, including, but not limited to, the following:

•an inability to identify attractive expansion projects;

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•an inability to obtain and/or maintain necessary rights-of-way, real-estate rights or permits or other government approvals, including approvals by regulatory agencies;

•an inability to successfully integrate the infrastructure we build with our existing systems;

•an inability to obtain and/or maintain sources of fresh water;

•an inability to raise financing for expansion projects on economically acceptable terms;

•incorrect assumptions about volumes, revenues, costs and in-service timing, as well as potential growth; or

•an inability to secure or maintain adequate customer commitments to use the newly expanded facilities.

Additionally, we face and expect to continue to face staunch opposition to the development of expansion projects (such as the MVP project) and operation of our pipelines and facilities from environmental groups, landowners, local, regional and national groups opposed to the natural gas industry and/or fossil fuels generally, activists and other advocates. Such opposition has taken and will likely continue to take many forms, including organized protests, attempts to block, vandalize or sabotage our development or operations, intervention in regulatory or administrative proceedings involving our assets directly or indirectly, lawsuits, legislation or other actions designed to prevent, disrupt or delay the development or operation of our assets and business.

Any event that delays or interrupts (or continues to delay or interrupt) the completion of expansion projects, and/or revenues generated, or expected to be generated, by our operations or that causes us to make significant expenditures not covered by insurance, could adversely affect our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

We also periodically evaluate inorganic growth opportunities, including additional interests in existing joint ventures. There is no guarantee that we will be able to identify, compete for and/or complete, suitable strategic transactions, or, in the case of any such strategic transaction, achieve synergies or other potential benefits. See also “Acquisitions that we may make could reduce, rather than increase, our results of operations and liquidity, and adversely affect our ability to pay dividends to our shareholders.” in Part I, "Item 1A. Risk Factors" of this Annual Report on Form 10-K.

Failure to achieve growth could adversely affect our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Expanding our business by constructing new midstream assets subjects us to risks.

Our growth strategy includes organic and greenfield growth projects. The development and construction of pipeline infrastructure and storage facilities and the optimization of such assets involve numerous regulatory, environmental, political and legal uncertainties that are beyond our control, and require the expenditure of significant amounts of capital and expose us to risks. Those risks include the failure to meet customer contractual requirements; delays caused by landowners; delays caused by advocacy groups or activists opposed to the natural gas industry through lawsuits or intervention in regulatory proceedings; environmental hazards; vandalism; adverse weather conditions; the performance of third-party contractors; delays caused by evolving regulatory or legal requirements; the lack of available skilled labor, equipment and materials (or escalating costs in respect thereof) and the inability to obtain necessary rights-of-way or approvals and permits from regulatory agencies on a timely basis or at all (and maintain such rights-of-way, approvals and permits once obtained). These types of projects may not be completed on schedule, within budgeted cost, or, in the case of the MVP Joint Venture may continue to be delayed and exceed the budgeted cost, or at all. For example, public participation, including by pipeline infrastructure opponents, in the review and permitting process of projects, through litigation or otherwise, can introduce uncertainty and adversely affect project timing, completion and cost. See also “The regulatory approval process for the construction of new midstream assets is very challenging, has significantly increased costs and delayed targeted in-service dates, and decisions by regulatory and judicial authorities in pending or potential proceedings are likely to impact our or the MVP Joint Venture's ability to obtain or maintain in effect all approvals and authorizations necessary to complete certain projects on the targeted time frame or at all or our ability to achieve the expected investment returns on the projects.” in Part I, "Item 1A. Risk Factors" of this Annual Report on Form 10-K. Further, civil protests regarding environmental justice and social issues, including proposed construction and location of infrastructure associated with fossil fuels, may lead to increased litigation, legislative and regulatory initiatives and review at federal, state, tribal and local levels of government that could prevent or delay the construction of such infrastructure and realization of associated revenues.

Additionally, construction expenditures on projects may occur over an extended period, yet we will not receive revenues from, or realize any material increases in cash flow as a result of, the relevant project until it is placed into service. Moreover, our cash flow from a project may be delayed or may not meet our expectations. Furthermore, we may construct facilities to capture

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anticipated future growth in production and/or demand in a region in which such growth does not materialize. As a result, new facilities may not be able to attract enough throughput to achieve our expected investment return. Such issues in respect of the construction of midstream assets could adversely affect our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

We are subject to numerous hazards and operational risks.

Our business operations are subject to the inherent hazards and risks normally incidental to the gathering, transmission and storage of natural gas and performance of water services. These operating risks, some of which we have experienced and/or could experience in the future, include but are not limited to:

•damage to pipelines, facilities, equipment, environmental controls and surrounding properties caused by hurricanes, earthquakes, tornadoes, abnormal amounts of rainfall, floods and flash flooding, fires, droughts, landslides and other natural disasters and acts of sabotage, vandalism and terrorism;

•inadvertent damage from construction, vehicles, and farm and utility equipment;

•uncontrolled releases of natural gas and other hydrocarbons or of fresh, mixed or produced water;

•leaks, migrations or losses of natural gas as a result of the malfunction of equipment or facilities and, with respect to storage assets, as a result of undefined boundaries, geologic anomalies, natural pressure migration and wellbore migration;

•ruptures, fires and explosions;

•pipeline freeze offs due to cold weather; and

•other hazards that could also result in personal injury and loss of life, pollution to the environment and suspension of operations.

Any such events, certain of which we have experienced, and any of which we may experience in the future, could result in loss of human life, personal injuries, significant damage to property, environmental pollution, impairment or interruption, which could be significant, of our operations, regulatory investigations and penalties and substantial losses to us and could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders. The location of certain segments of our systems in or near populated areas, including residential areas, commercial business centers and industrial sites, could increase the damages resulting from these risks. Accidents or other operating risks have resulted, and in the future could result, in loss of service available to our customers. Potential customer impacts arising from service interruptions on segments of our systems include, but are not limited to, limitations on our ability to satisfy customer contractual requirements, obligations to provide reservation charge credits to customers in times of constrained capacity and solicitation of our existing customers by third parties for potential new projects that would compete directly with our existing services. Such circumstances could adversely impact our ability to retain customers, as well as potentially negatively impact our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Increased competition from other companies that provide gathering, transmission and storage, and water services, or from alternative fuel or energy sources, could negatively impact demand for our services, which could adversely affect our financial results.

Our ability to renew or replace existing contracts at rates sufficient to maintain current revenues and cash flows could be adversely affected by the activities of our competitors. Our systems compete primarily with other interstate and intrastate pipelines and storage facilities in the gathering, transmission and storage of natural gas. Some of our competitors have greater financial resources and may be better positioned to compete, including if the midstream industry moves towards greater consolidation; further, some of such competitors may now, or in the future, have access to greater supplies of natural gas or water than we do. Some of these competitors may expand or construct gathering systems, transmission and storage systems and water systems that would create additional competition for the services we provide to our customers. In addition, our customers may develop or acquire their own gathering, transmission or storage, or water services instead of using ours.

The policies of the FERC promoting competition in natural gas markets continue to have the effect of increasing the natural gas transmission and storage options for our customer base. As a result, we have experienced, and in the future could experience, “turnback” of firm capacity as existing agreements expire. If we are unable to remarket this capacity or can remarket it only at substantially discounted rates compared to previous contracts, we may have to bear the costs associated with the turned back capacity. Increased competition could reduce the volumes of natural gas transported or stored on our systems or, in cases where

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we do not have long-term firm contracts, could force us to lower our transmission or storage rates. Increased competition could also adversely affect demand for our water services.

Further, natural gas as a fuel competes with other forms of energy available to end-users, including coal, liquid fuels and, increasingly, renewable and alternative energy. Demand for and development of renewable and alternative energy is increasing as a result of concern regarding climate change. Further, renewable and alternative energy continues to become more cost competitive with fossil fuels, including natural gas, and is growing more widely available. Continued increases, whether driven by regulation or consumer preferences, in the demand for renewable and alternative energy at the expense of natural gas (or increases in the demand for other sources of energy, particularly if prices for natural gas significantly increase relative to other forms of energy as fuel) could adversely affect our producer customers and lead to a reduction in demand for our natural gas gathering, transmission and storage, and water services.

All of these competitive pressures could make it more difficult for us to retain our existing customers and/or attract new customers and/or additional volumes from existing customers as we seek to maintain and expand our business, which could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders. In addition, competition, including from renewable and alternative energy, could intensify the negative impact of factors that decrease demand for natural gas in the markets served by our systems, such as adverse economic conditions, weather, higher fuel costs and taxes or other governmental or regulatory actions that directly or indirectly increase the cost or limit the use of natural gas.

We may not be able to renew or replace expiring contracts at favorable rates, on a long-term basis or at all.

One of our exposures to market risk occurs at the time our existing contracts expire and are subject to renegotiation and renewal. Based on total projected contractual revenues, including projected contractual revenues from future capacity expected from expansion projects that are not yet fully constructed for which we have executed firm contracts, our firm gathering contracts and firm transmission and storage contracts had weighted average remaining terms of approximately 14 years and 13 years, respectively, as of December 31, 2021. The extension or replacement of existing contracts depends on a number of factors beyond our control, including, but not limited to, the level of existing and new competition to provide services to our markets; the macroeconomic factors affecting natural gas economics for our current and potential customers; the balance of supply and demand, on a short-term, seasonal and long-term basis, in our markets; the extent to which the customers in our markets are willing to contract on a long-term basis or require capacity on our systems; and the effects of federal, state or local regulations on the contracting practices of our customers and us. For more information related to contracting practices applicable to us see “Regulatory Environment – FERC Regulation” under “Item 1. Business.”

Any failure to extend or replace a significant portion of our existing contracts or to extend or replace our more significant contracts, or extending or replacing contracts at unfavorable or lower rates or with lower or no associated firm reservation fee revenues, could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

The ongoing outbreak of COVID-19 and its variant strains (or any future pandemic) could harm our business, results of operations and financial condition.

Disruptions caused by pandemics, epidemics or disease outbreaks, such as COVID-19 and variants thereof, could materially affect the domestic and global economy, the natural gas industry, and/or us. The COVID-19 pandemic is ongoing and there is considerable uncertainty regarding the extent to which COVID-19 and variant strains will continue to spread and the effects of such continued spread.

Given the ongoing and dynamic nature of the circumstances, it is difficult to predict the further impact of the COVID-19 outbreak (or any other outbreak) on the domestic economy, the natural gas industry, and/or us; however, our business, results of operations and financial condition could be negatively affected in numerous ways, including, without limitation, that:

•demand for natural gas could be adversely affected, as was the case in 2020, which could negatively affect prices and forward prices for natural gas and our customers, including their development plans and, consequently, lead to curtailments or otherwise decrease demand for our services or heighten our exposure to customer risk;

•our operations, or those of our customers or suppliers, may be disrupted or become less efficient if a significant number of employees or contractors are unavailable due to illness;

•we, our customers and suppliers may be adversely affected due to the continued constraints on global supply chains resulting from the outbreak and may be adversely affected if the outbreak causes further or long delays in access to or

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increases to cost of inventory, equipment or other items necessary to our, our customers’ or our suppliers’ respective businesses;

•legal and regulatory processes relevant to our operations may be disrupted or slowed, such as if relevant governmental authorities suffer reduced workforce availability due to the virus; and

•resultant disruption to, and instability in, financial and credit markets may adversely affect our access to capital, leverage and liquidity levels and credit ratings, as well as our counterparties’ access to capital, business continuity, financial stability, leverage and liquidity levels and credit ratings (which could heighten counterparty credit risk to which we are exposed in the ordinary course of our business).

Further, we could be affected by governmental mandates and responses to the pandemic. See “The loss or disengagement of key personnel could adversely affect our ability to execute our strategic, operational and financial plans.” in this Part I, "Item 1A. Risk Factors" of this Annual Report on Form 10-K.

Although we believe that we are following best practices under COVID-19 guidance and intend to continue to refine our practices as additional guidance is released, there is no guarantee that efforts by us or any other entity or authority to mitigate potential adverse impacts of the COVID-19 outbreak, whether on a local, state or national level, will be effective.

We also may incur additional costs to further attempt to mitigate potential impacts caused by COVID-19 related disruptions, which could adversely affect our financial condition and results of operations. Further, the COVID-19 outbreak (including federal, state and local governmental responses, broad economic impacts and market disruptions) has heightened and may further heighten many of the other risks set forth herein. The extent of the impact of COVID-19 on us will continue to depend on future developments, which are highly uncertain and cannot be predicted, including new information which may emerge concerning the severity of COVID-19, appearance or escalating circulation of new strains of the virus (including those with potential immune evasion or escape mutations), duration of the outbreak, and related economic effects and aftereffects (including on the natural gas industry), and actions taken to contain COVID-19 or its impact, including vaccine acceptance and mandates.

We may not be able to increase our customer throughput and resulting revenue due to competition and other factors, which could limit our ability to grow.

Our ability to increase our customer-subscribed capacity and throughput and resulting revenue is subject to numerous factors beyond our control, including competition from third-party producers’ existing contractual obligations to competitors, the location of our assets relative to those of competitors for potential producer customers, and the extent to which we have available capacity when and where shippers require it. To the extent that we lack available capacity on our systems for volumes, or we cannot economically increase capacity, we may not be able to compete effectively with third-party systems for additional natural gas production in our areas of operation.

Our efforts to attract new customers or larger commitments from existing customers may be adversely affected by our desire to provide services pursuant to long-term firm contracts and contracts with MVCs. Our potential customers may prefer to obtain services under other forms of contractual arrangements which could require volumetric exposure or potentially direct commodity exposure, and we may not be willing to agree to such other forms of contractual arrangements.

If third-party pipelines and other facilities interconnected to our pipelines and facilities become unavailable to transport or process natural gas, our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders could be adversely affected.

We depend on third-party pipelines and other facilities that provide receipt and delivery options to and from our transmission and storage system. For example, our transmission and storage system interconnects with the following interstate pipelines: Texas Eastern, Dominion Transmission, Columbia Gas Transmission, Tennessee Gas Pipeline Company, Rockies Express Pipeline LLC, National Fuel Gas Supply Corporation and ET Rover Pipeline, LLC, as well as multiple distribution companies. Similarly, our gathering systems have multiple delivery interconnects to multiple interstate pipelines. In the event that our access to such systems is impaired, the amount of natural gas that our gathering systems can gather and transport previously has been, and in the future would be, adversely affected, which has in the past reduced and could, as applicable, reduce revenues from our gathering activities as well as transmission and storage activities. Because we do not own these third-party pipelines or facilities, their continuing operation is not within our control. If these or any other pipeline connections or facilities were to become unavailable for current or future volumes of natural gas due to repairs, damage to the facility, lack of capacity or any other reason, our ability to operate efficiently and continue shipping natural gas to end markets could be restricted, as has occurred in the past. Any temporary or permanent interruption at any key pipeline interconnect or facility could have a material

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adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

A substantial majority of the services we provide on our transmission and storage system are subject to long-term, fixed-price “negotiated rate” contracts that are subject to limited or no adjustment, even if our cost to perform such services exceeds the revenues received from such contracts, and, as a result, our costs could exceed our revenues received under such contracts, we could be unable to achieve the expected investment return under such contracts, and/or our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders could be adversely affected.

It is possible that costs to perform services under “negotiated rate” contracts could exceed the negotiated rates we have agreed to provide to our customers. If this occurs, it could decrease the cash flow realized by our systems and, therefore, could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders. Under FERC policy, a regulated service provider and a customer may mutually agree to a “negotiated rate,” and that contract must be filed with and accepted by the FERC. As of December 31, 2021, approximately 97% of the contracted firm transmission capacity on our system was subscribed under such “negotiated rate’’ contracts. Unless the parties to these “negotiated rate” contracts agree otherwise, the contracts generally may not be adjusted to account for increased costs that could be caused by inflation or other factors relating to the specific facilities being used to perform the services.

We have entered into joint ventures, and may in the future enter into additional or modify existing joint ventures, that might restrict our operational and corporate flexibility and divert our management’s time and our resources. In addition, we exercise no control over joint venture partners and it may be difficult or impossible for us to cause these joint ventures to take actions that we believe would be in our or the joint venture’s best interests and these joint ventures are subject to many of the same operational risks to which we are subject.

We have entered into joint ventures to construct the MVP and MVP Southgate projects and a joint venture relating to Eureka Midstream, and may in the future enter into additional joint venture arrangements with third parties. Joint venture arrangements may restrict our operational and corporate flexibility. Joint venture arrangements and dynamics can also divert management and operating resources in a manner that is disproportionate to our ownership percentage in such ventures. Because we do not control all of the decisions of the MVP Joint Venture or the joint venture relating to Eureka Midstream, it may be difficult or impossible for us to cause these joint ventures to take actions that we believe would be in our or the joint venture’s best interests. Moreover, joint venture arrangements involve various risks and uncertainties, such as committing that we fund operating and/or capital expenditures, the timing and amount of which we may not control, and our joint venture partners may not act in a manner that we believe would be in our or the joint venture’s best interests, may elect not to support further pursuit of projects, and/or may not satisfy their financial obligations to the joint venture. The loss of joint venture partner support in further pursuing or funding a project may significantly adversely affect the ability to complete the project. In addition, the operations of the MVP Joint Venture, Eureka Midstream and any joint ventures we may enter into in the future are subject to many of the same operational risks to which we are subject. For example, we may not be able to obtain financing at, or in respect of, a joint venture, which could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Acquisitions that we may make could reduce, rather than increase, our results of operations and liquidity, and adversely affect our ability to pay dividends to our shareholders.

Any completed acquisition involves potential risks, including, among other things:

•failure to realize assumptions about volumes, revenues, capital expenditures and costs, including synergies and potential growth;

•an inability to secure or maintain adequate customer commitments to use the acquired systems or facilities;

•an inability to successfully integrate the assets or businesses we acquire;

•we could be required to contribute additional capital to support acquired businesses or assets, and we may assume liabilities that were not disclosed to us, for which we are not indemnified or insured or for which our indemnity or insurance is inadequate;

•the diversion of management’s and employees’ attention from other business concerns in a manner that is disproportionate to the relative size and impact of, or ownership percentage in, such acquired assets or entities; and

•unforeseen difficulties operating a larger organization or in new geographic areas, with new joint venture partners or new business lines.

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If risks such as the above are realized, or if an acquisition fails to be accretive over the long term to our cash generated from operations on a per share basis, it could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

We do not insure against all potential losses and could be seriously harmed by unexpected liabilities.

We are not fully insured against all risks inherent in our business, including certain environmental accidents that might occur as well as many cyber events. In addition, we do not maintain business interruption insurance of the types and in amounts necessary to cover all possible risks of loss, like project delays caused by pandemics, cyberattacks, governmental action or inaction. The occurrence of any risks not fully covered by insurance could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

We currently maintain excess liability insurance that covers our and our affiliates’ legal and contractual liabilities arising out of bodily injury, personal injury or property damage, including resulting loss of use, to third parties. This excess liability insurance includes coverage for sudden and accidental pollution liability but excludes: release of pollutants subsequent to their disposal; release of substances arising from the combustion of fuels that result in acidic deposition; and testing, monitoring, clean-up, containment, treatment or removal of pollutants from property owned, occupied by, rented to, used by or in the care, custody or control of us and our affiliates. We also maintain coverage for us and our affiliates for physical damage to assets and resulting business interruption, including certain damage caused by cyberattacks.

Most of our insurance is subject to deductibles or self-insured retentions. If a significant accident or event occurs for which we are not fully insured, it could adversely affect our operations, business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders. We may not be able to maintain or obtain insurance of the types and in the amounts we desire at reasonable rates, and we may elect to self-insure a portion of our asset portfolio. The insurance coverage we have obtained or may obtain may contain large deductibles or fail to cover certain hazards or cover all potential losses. In addition, for pre-Distribution losses, we share insurance coverage with EQT, and we will remain responsible for payment of any deductible or self-insured amounts under those insurance policies. To the extent we experience a pre-Distribution loss that would be covered under EQT’s insurance policies, our ability to collect under those policies may be reduced to the extent EQT erodes the limits under those policies.

Significant portions of our pipeline systems have been in service for several decades. There could be unknown events or conditions, or increased maintenance or repair expenses and downtime, associated with our pipelines that could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Significant portions of our transmission and storage system and FERC-regulated gathering system have been in service for several decades. The age and condition of these systems could result in adverse events, or increased maintenance or repair expenditures, and downtime associated with increased maintenance and repair activities. Any such adverse events or any significant increase in maintenance and repair expenditures or downtime, or related loss of revenue, due to the age or condition of our systems could adversely affect our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

The loss or disengagement of key personnel could adversely affect our ability to execute our strategic, operational and financial plans.

Our operations are dependent upon key management, technical and professional personnel, and one or more of these individuals could leave our employment. The unexpected loss of the services and skills of one or more of these individuals could have a detrimental effect on us. In addition, the success of our operations depends, in part, on our ability to identify, attract, develop and retain experienced personnel. There is increased competition for experienced technical and other professionals, primarily in the corporate services functions, which could increase the costs associated with identifying, attracting and retaining such personnel. Additionally, a lack of employee engagement could lead to increased employee burnout, loss of productivity, increased propensity for errors, increased employee turnover, increased absenteeism, increased safety incidents and decreased customer satisfaction, which may in turn negatively impact our results of operations and financial condition. If we cannot identify, attract, develop, retain and engage key management, technical and professional personnel, along with other qualified employees, to support the various functions of our business, our ability to compete could be harmed.

On November 4, 2021, OSHA issued the ETS to carry out President Biden’s executive order requiring all employers with at least 100 employees to ensure that their employees are fully vaccinated or require unvaccinated workers to produce a negative test result at least once a week. On January 13, 2022, the U.S. Supreme Court granted an application to stay the ETS pending disposition of the applicants' petitions for review in the U.S. Court of Appeals for the Sixth Circuit. Effective January 26, 2022, OSHA withdrew the ETS as an enforceable emergency temporary standard, but did not withdraw the ETS as a proposed rule.

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Should the ETS, or a similar state or local requirement, take effect in the future, the Company expects it would be subject to such regulation concerning COVID-19 vaccination or testing. In that case, the Company may be required to implement a requirement that many or most employees get vaccinated, subject to limited exceptions, or be tested. Such a mandate may result in increased costs, operational disruptions or employee attrition for the Company, which could be material. If we lose employees, it may be difficult in the current competitive labor market to find replacement employees, and this could have an adverse effect on future operations, revenues and costs, which could be material. Accordingly, implementation of and complying with the ETS or a similar state or local requirement could have a material adverse effect on our business and results of operations.

Our exposure to direct commodity price risk may increase in the future.

For the years ended December 31, 2021, 2020 and 2019, approximately 64%, 66% and 58%, respectively, of our operating revenues were generated from firm reservation fees. Although our goal is to execute long-term firm reservation fee and MVC contracts with new or existing customers in the future, our efforts to obtain such contractual terms may not be successful. In addition, we may acquire or develop additional midstream assets in the future that do not provide services primarily based on capacity reservation charges or other fixed fee arrangements and therefore may have a greater exposure to fluctuations in customer volume variability driven by commodity price risk than our current operations. Significantly greater exposure to the volatility of natural gas prices, including regional basis differentials with regard to natural gas prices, as a result of our contracts could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Additionally, the EQT Global GGA provides for potential cash bonus payments payable by EQT to us during the period beginning on the first day of the calendar quarter in which the MVP full in-service date occurs through the calendar quarter ending December 31, 2024 (the Henry Hub cash bonus payment provision). The fair value of the Henry Hub cash bonus payment provision is largely determined by estimates of the NYMEX Henry Hub natural gas forward price curve, and payments are conditioned upon the quarterly average of certain Henry Hub natural gas prices exceeding certain price thresholds. Based on the Henry Hub natural gas forward strip prices as of February 18, 2022 and the terms of the Henry Hub cash bonus payment provision, any adverse change in assumptions regarding the MVP project may further decrease the estimated fair value of the derivative asset attributable to the Henry Hub cash bonus payment provision, and such decrease may be substantial. Such changes in estimated fair value, if any, would be recognized in other (expense) income, net, on our statements of consolidated comprehensive income and could have an adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

We do not own all of the land on which our pipelines and facilities are located, which could disrupt our operations and future development.

We do not own all of the land on which our pipelines, storage systems and facilities have been constructed, and we have been, and in the future could be, subject to more onerous terms, and/or increased costs or delays, in retaining necessary land use if we do not have valid rights-of-way or easements, if such rights-of-way or easements lapse or terminate or if our facilities are not properly located within the boundaries of such rights-of-way or easements. Although many of these rights are perpetual in nature, we occasionally obtain the rights to construct and operate our pipelines on land owned by third parties and governmental agencies for a specific period of time. As has been the case in the past, if we were to be unsuccessful in negotiating or renegotiating rights-of-way or easements, we might have to institute condemnation proceedings on our FERC-regulated assets or relocate our facilities for non-regulated assets. The FERC has announced a policy that would presumptively stay the effectiveness of certain future construction certificates, which may limit when we are able to exercise condemnation authority. It is possible that the U.S. Congress may amend Section 7 of the NGA to codify the FERC's presumptive stay or otherwise limit, modify, or remove the ability to utilize condemnation. A loss of rights-of-way or easements or a relocation could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders. Additionally, even when we own an interest in the land on which our pipelines, storage systems and facilities have been constructed, agreements with correlative rights owners have caused us to, and in the future may require that we, relocate pipelines and facilities or shut in storage systems and facilities to facilitate the development of the correlative rights owners’ estate, or pay the correlative rights owners the lost value of their estate if they are not willing to accommodate development.

Legal and Regulatory Risk

Our natural gas gathering, transmission and storage services are subject to extensive regulation by federal, state and local regulatory authorities. Changes in or additional regulatory measures adopted by such authorities, and related litigation, could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends.

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Our interstate natural gas transmission and storage operations are regulated by the FERC under the NGA and the NGPA and the regulations, rules and policies promulgated under those and other statutes. Certain portions of our gathering operations are also currently regulated by the FERC in connection with our interstate transmission operations. Our FERC-regulated operations are pursuant to tariffs approved by the FERC that establish rates (other than market-based rate authority), cost recovery mechanisms and terms and conditions of service to our customers. The FERC’s authority extends to a variety of matters relevant to our operations. For additional information, see “Regulatory Environment—FERC Regulation” and “Regulatory Environment—FERC Regulation of Gathering Rates and Terms of Service” under “Item 1. Business.”

Pursuant to the NGA, existing interstate transmission and storage rates, terms and conditions of service, and contracts may be challenged by complaint and are subject to prospective change by the FERC. Additionally, rate increases, changes to terms and conditions of service and contracts proposed by a regulated interstate pipeline may be protested and such actions can be delayed and may ultimately be rejected by the FERC. We currently hold authority from the FERC to charge and collect (i) “recourse rates,” which are the maximum rates an interstate pipeline may charge for its services under its tariff, (ii) “discount rates,” which are rates below the “recourse rates” and above a minimum level, (iii) “negotiated rates,” which involve rates that may be above or below the “recourse rates,” provided that the affected customers are willing to agree to such rates and that the FERC has approved the negotiated rate agreement, and (iv) market-based rates for some of our storage services from which we derive a small portion of our revenues. As of December 31, 2021, approximately 97% of our contracted firm transmission capacity was subscribed by customers under negotiated rate agreements under our tariff, rather than recourse, discount or market-based rate contracts. There can be no guarantee that we will be allowed to continue to operate under such rates or rate structures for the remainder of those assets’ operating lives. Customers, the FERC or other interested stakeholders, such as state regulatory agencies, may challenge our rates offered to customers or the terms and conditions of service included in our tariffs. We do not have an agreement in place that would prohibit customers, including EQT or its affiliates, from challenging our tariffs. Any successful challenge against rates charged for our transmission and storage services could have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Any changes to the FERC’s policies regarding the natural gas industry may have an impact on us, including the FERC’s approach to pro-competitive policies as it considers matters such as interstate pipeline rates and rules and policies that may affect rights of access to natural gas transmission capacity and transmission and storage facilities. The FERC and Congress may continue to evaluate changes in the NGA or new or modified FERC regulations or policies that may impact our operations and affect our ability to construct new facilities and the timing and cost of such new facilities, as well as the rates we charge our customers and the services we provide.

A significant construction project generally requires review by multiple governmental agencies, including state and local agencies, whose cooperation is important in completing the regulatory process on schedule. Any agency’s delay in the issuance of, or refusal to issue, authorizations or permits, issuance of such authorizations or permits with unanticipated conditions, or the loss of a previously-issued authorization or permit, for one or more of these projects may mean that we will not be able to pursue these projects or that they will be constructed in a manner or with capital requirements that we did not anticipate. Such delays, refusals or resulting modifications to projects could materially and negatively impact the revenues and costs expected from these projects or cause us to abandon planned projects. For example, see “Developments, Market Trends and Competitive Conditions” under “Item 1. Business.” and “Item 3. Legal Proceedings.” for a discussion of certain such regulatory matters relevant to the MVP and the MVP Southgate projects.

Failure to comply with applicable provisions of the NGA, the NGPA, federal pipeline safety laws and certain other laws, as well as with the regulations, rules, orders, restrictions and conditions associated with these laws, could result in the imposition of administrative and criminal remedies and civil penalties. For example, the FERC is authorized to impose civil penalties of up to approximately $1.3 million (adjusted periodically for inflation) per violation, per day for violations of the NGA, the NGPA or the rules, regulations, restrictions, conditions and orders promulgated under those statutes.

In addition, future federal, state or local legislation or regulations under which we will operate our natural gas gathering, transmission and storage businesses may have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

We are subject to stringent environmental and other laws and regulations that expose us to significant costs and liabilities that could exceed our expectations and affect our business. The current laws and regulations affecting our business are subject to change and in the future we may be subject to additional or revised laws, regulations and legal requirements, that could adversely impact our business.

Our operations are regulated extensively at the federal, state and local levels. For additional information on laws, regulations and other legal requirements applicable to us, see “Regulatory Environment” under “Item 1. Business.” Laws, regulations and other legal requirements applicable to our business, including relating to the environmental protection, health and safety, as well

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as climate change, have, among other things, increased, and in the future could continue to increase, our cost of compliance and doing business, including costs related to planning, designing, permitting, constructing, installing, operating, updating and/or abandoning gathering, transmission and water systems and pipelines, as well as storage systems. The need to comply with such laws, regulations and other legal requirements, and incidents of noncompliance, whether by us or third parties with whom we engage, has adversely affected and will likely continue to adversely affect our business, such as by, among other things and as applicable, resulting in costly delays, operating restrictions and diversion of management time and resources in evaluating the ability to pursue projects, such as when new or additional permits or alternative construction methods are required. For example, as discussed under “The regulatory approval process for the construction of new midstream assets is very challenging, has significantly increased costs and delayed targeted in-service dates, and decisions by regulatory and judicial authorities in pending or potential proceedings are likely to impact our or the MVP Joint Venture's ability to obtain or maintain in effect all approvals and authorizations necessary to complete certain projects on the targeted time frame or at all or our ability to achieve the expected investment returns on the projects.”, there are several pending applications for and/or challenges to certain aspects of the MVP project and the MVP Southgate project that affect the MVP project and the MVP Southgate project, as applicable, including those litigation and regulatory-related delays discussed in “Item 3. Legal Proceedings.” In addition, noncompliance with applicable laws, regulations or other legal requirements, including required permits and other approvals, could subject us to, among other things, claims for personal injuries, property damage and other damages and, even if as a result of factors beyond our control and irrespective of our fault, could result in the suspension or termination of our operations and subject us to administrative, civil and criminal penalties and damages that could materially and negatively affect our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders. The risk of our incurring environmental costs and liabilities in connection with our operations is significant given our handling of natural gas, produced water and other hydrocarbons, as well as air emissions related to our operations. Risk is also present as a result of historical industry operations and waste disposal practices, and our handling of waste. These matters are subject to stringent and complex federal, state and local laws and regulations governing environmental protection and could affect our business in many ways. For example, an accidental release from one of our pipelines could subject us to substantial liabilities arising from environmental cleanup and restoration costs, claims made by neighboring landowners and other third parties for personal injury and property damage and fines or penalties for related violations of environmental laws or regulations. We may not be able to recover all or any of these costs from insurance. Further, we are generally responsible for all liabilities associated with the environmental condition of our facilities and assets, whether acquired or developed, regardless of when the liabilities arose and whether they are known or unknown. In connection with certain acquisitions and divestitures, we could acquire, or be required to provide indemnification against, environmental liabilities that could expose us to material losses, which may not be covered by insurance. In addition, the steps we could be required to take to bring certain facilities that are acquired into compliance could be prohibitively expensive, and we might be required to shut down, divest or alter the operation of those facilities, which might cause us to incur losses.

Laws, regulations and other legal requirements applicable to our business also are constantly changing, and implementation of compliant processes in response to such changes could be costly and time consuming. As an example, the FWS receives hundreds of petitions to consider listing of additional species as endangered or threatened and is regularly sued or threatened with lawsuits to address these petitions. Some of these legal actions have resulted, and may in the future result, in the listing of species located in our operating areas. Such designations of previously unprotected species as being endangered or threatened, or the designation of previously unprotected areas as a critical habitat for such species has adversely affected and may in the future adversely affect our assets or projects. Additionally, as discussed under “Regulatory Environment” in “Item 1. Business”, federal and state governments and agencies, including states where we operate, have made advancing environmental justice a priority. A significant number of current environmental justice initiatives focus on enhancing public participation in permitting and other project development-related decisions. We have been, and in the future may be, the target of objections to permits before state and federal agencies and related litigation brought by individuals or advocacy organizations that are purporting to raise environmental justice issues. In addition, various federal agencies, including EPA and DOJ, have announced plans to seek out opportunities to address environmental justice issues through federal enforcement actions. Revised or additional laws, regulations or legal requirements (or interpretations thereof) that result in increased compliance costs, litigation or additional operating restrictions, particularly if those costs are not fully recoverable from our customers, or affect our customers’ production and operations, could have a material adverse effect on our business, financial position, results of operations, liquidity and ability to pay dividends to our shareholders.

For information related to risks associated with laws and regulations concerning climate change, see “Our business is subject to climate change-related transitional risks (including evolving climate-focused regulation and climate change-driven trends emphasizing financing non-fossil fuel businesses and prompting pursuit of emissions reductions, lower-carbon technologies and alternative forms of energy) and physical risks that could significantly increase our operating expenses and capital costs, adversely affect our customers’ development plans, and reduce demand for our products and services.”

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We may incur significant costs and liabilities as a result of adverse events or increasingly stringent pipeline safety regulation, including pipeline integrity management program testing and related repairs.

The DOT, acting through PHMSA, has adopted regulations requiring pipeline operators to develop integrity management programs for transmission pipelines located where a leak or rupture could harm high population areas, unless the operator effectively demonstrates by risk assessment that the pipeline could not affect the area. The regulations require operators, including us, to perform ongoing assessments of pipeline integrity; identify and characterize applicable threats to pipeline segments that could impact a high population area; maintain processes for data collection, integration and analysis; repair and remediate pipelines as necessary; and implement preventive and mitigating actions. PHMSA has also recently adopted regulations extending existing design, operational and maintenance, and reporting requirements to onshore gathering pipelines in rural areas.

Changes to pipeline safety laws and regulations that result in more stringent or costly safety standards could have a material adverse effect on us. For more information on the laws, regulations and risks applicable to us, see “Regulatory Environment—Pipeline Safety and Maintenance” under “Item 1. Business.”

The adoption of legislation relating to hydraulic fracturing and the enactment of new or increased severance taxes and impact fees on natural gas production could cause our current and potential customers to reduce the number of wells they drill in the Marcellus and Utica Shales or curtail production of existing wells. If reductions are significant for those or other reasons, the reductions would likely have a material adverse effect on our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders.

Our assets are primarily located in the Marcellus Shale fairway in southwestern Pennsylvania and northern West Virginia and the Utica Shale fairway in southeastern Ohio, and a substantial majority of the production that we receive from customers is produced from wells completed using hydraulic fracturing. Hydraulic fracturing is an important and commonly used process in the completion of oil and gas wells, particularly in unconventional resource plays like the Marcellus and Utica Shales. Hydraulic fracturing is typically regulated by state oil and gas commissions and similar agencies, but several federal agencies have asserted regulatory authority over aspects of the process, including the EPA, which finalized effluent limit guidelines allowing zero discharge of wastewater from shale gas extraction operations to publicly owned treatment plants in 2016 in addition to existing limits on direct discharges. Additionally, in response to increased public concern regarding the alleged potential impacts of hydraulic fracturing, the EPA has asserted federal regulatory authority pursuant to the federal Safe Drinking Water Act over certain hydraulic fracturing activities involving the use of diesel fuels and published permitting guidance in February 2014 addressing the performance of such activities using diesel fuels.

The U.S. Congress has from time to time considered the adoption of legislation to provide for federal regulation of hydraulic fracturing, while a number of states, including those in which we operate, have adopted, and other states are considering adopting, regulations that could impose more stringent disclosure and/or well construction requirements on hydraulic fracturing operations. Some states, such as Pennsylvania, have imposed fees on the drilling of new unconventional oil and gas wells. Some states have elected, and other states could elect, to prohibit hydraulic fracturing altogether. The Biden Administration temporarily banned new leases for oil and gas drilling on federal lands in January 2021, but that ban was subsequently blocked by a federal court. Also, certain local governments have adopted, and others may adopt, ordinances within their jurisdictions regulating the time, place and manner of drilling activities in general or hydraulic fracturing activities in particular. Further, several federal governmental agencies have conducted reviews and studies on the environmental aspects of hydraulic fracturing, including the EPA. For example, in December 2016, the EPA issued its final report on a study it had conducted over several years regarding the effects of hydraulic fracturing on drinking water sources. The final report, contrary to several previously published draft reports issued by the EPA, found instances in which impacts to drinking water may occur. However, the report also noted significant data gaps that prevented the EPA from determining the extent or severity of these impacts. EPA has more recently sought input from states and stakeholders on approaches to management of wastewater produced from oil and gas extraction at onshore facilities, and published a summary of the input it received in May 2020. The results of such reviews or studies could spur initiatives to further regulate hydraulic fracturing.

State and federal regulatory agencies have focused on a possible connection between hydraulic fracturing-related activities and the increased occurrence of seismic activity (induced seismicity). In a few instances, operators of injection disposal wells in the vicinity of seismic events have been ordered to reduce injection volumes or suspend operations. Some state regulatory agencies, including those in Colorado, Ohio, Oklahoma and Texas, have modified their regulations to account for induced seismicity. While Pennsylvania is not one of the states where such regulation has been enacted, regulatory agencies at all levels are continuing to study the possible linkage between oil and gas activity and induced seismicity. These developments could result in additional regulation and restrictions on the use of injection disposal wells and hydraulic fracturing. Such regulations and restrictions could cause delays and impose additional costs and restrictions on our customers.

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The adoption of new laws, regulations, ordinances, or executive actions at the federal, state or local levels imposing more stringent restrictions on hydraulic fracturing could make it more difficult for our customers to complete natural gas wells, increase customers’ costs of compliance and doing business, and otherwise adversely affect the hydraulic fracturing services they perform, which could negatively impact demand for our gathering, transmission and storage, or water services.

Furthermore, the tax laws, rules and regulations that affect our customers are subject to change. For example, Pennsylvania’s governor has previously proposed legislation to impose a state severance tax on the extraction of natural resources, including natural gas produced from the Marcellus and Utica Shale formations, either in replacement of or in addition to the existing state impact fee. Pennsylvania’s legislature has not thus far advanced any of the governor’s severance tax proposals; however, severance tax legislation may continue to be proposed in future legislative sessions. Any such tax increase or change could adversely impact the earnings, cash flows and financial position of our customers and cause them to reduce their drilling in the areas in which we operate, which could negatively impact demand on our gathering, transmission and storage, and water services.

Risks Related to an Investment in Us

For the taxable years prior to January 1, 2021, the tax treatment of EQM depended on its status as a partnership for U.S. federal income tax purposes, as well as it not being subject to a material amount of entity-level taxation by individual states. If the IRS were to treat EQM as a corporation or if EQM becomes subject to additional amounts of entity-level taxation for state or foreign tax purposes for any open taxable year prior to January 1, 2021, it would reduce the amount of cash we have available to pay dividends to our shareholders.

Prior to the EQM Merger, EQM was a publicly traded partnership and the anticipated after-tax economic benefit of an investment in our shares depended largely on EQM being treated as a partnership for federal income tax purposes, which requires that 90% or more of EQM’s gross income for every taxable year consist of qualifying income, as defined in Section 7704 of the Code. As a result of the EQM Merger, the requirements under Section 7704 of the Code are no longer applicable to EQM for taxable years beginning after December 31, 2020.

Despite the fact that EQM is a limited partnership under Delaware law and has not elected to be treated as a corporation for federal income tax purposes, it is possible, under certain circumstances, that the IRS could determine on audit for taxable years prior to January 1, 2021 for EQM to be treated as a corporation for federal income tax purposes. For example, EQM would be treated as a corporation if the IRS determined that less than 90% of EQM’s gross income for any such taxable year consisted of qualifying income within the meaning of Section 7704 of the Code.

If EQM was treated as a corporation for federal income tax purposes for any taxable year prior to January 1, 2021, EQM would be required to pay federal income tax on its taxable income at the corporate tax rate applicable to the relevant tax year and would likely pay state income taxes at varying rates. Distributions to us after the Separation Date would generally be taxed again as corporate distributions, and no income, gains, losses or deductions would flow through to us. Treatment of EQM as a corporation could result in a material reduction in the anticipated cash flow in the year of the payment to the IRS, potentially causing, among other things, a substantial reduction in the value of our shares.

If the IRS makes audit adjustments to EQM’s income tax returns for tax years beginning after 2017, the IRS (and some states) may assess and collect any resulting taxes (including any applicable penalties and interest) directly from EQM, in which case we may be required, and potentially former unitholders would be required, to reimburse EQM for such payments or, if EQM is required to bear such payments, such payments could have a material adverse effect on our business, financial position, results of operations, liquidity and ability to pay dividends to our shareholders.

Pursuant to the Bipartisan Budget Act of 2015, if the IRS makes audit adjustments to EQM’s income tax return for tax years beginning after 2017, the IRS (and some states) may assess and collect any resulting taxes (including any applicable interest and penalties) directly from EQM. EQM will have a limited ability to shift any such tax liability to its general partner and unitholders, including us, in accordance with their interests in EQM during the year under audit, but there can be no assurance that EQM will be able to do so under all circumstances, or that EQM will be able to effect corresponding shifts in state income or similar tax liability resulting from the IRS adjustment in states in which EQM does business in the year under audit or in the adjustment year. As a result of the EQM Merger, we own all of the EQM common units. If EQM makes payments of taxes, penalties and interest resulting from audit adjustments with respect to tax periods beginning after 2017 and before 2021, we and potentially former unitholders may be required to reimburse it for such payment or, if EQM is required to bear such payments, such payments could have a material adverse effect on our business, financial position, results of operations, liquidity and ability to pay dividends to our shareholders.

In the event the IRS makes an audit adjustment to EQM’s income tax returns and EQM does not or cannot shift the liability to its unitholders in accordance with their interests in EQM during the year under audit, EQM will generally have the ability to

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request that the IRS reduce the determined underpayment by reducing the suspended passive loss carryovers of EQM’s unitholders (without any compensation from EQM to such unitholders), to the extent such underpayment is attributable to a net decrease in passive activity losses allocable to certain partners. Such reduction, if approved by the IRS, will be binding on any affected unitholders.

Our stock price has fluctuated and may fluctuate significantly.

The market price of our common stock has experienced substantial price volatility in the past and may continue to do so due to a number of factors, some of which may be beyond our control. General market fluctuations, industry factors, such as climate change-related transitional risks, and general economic and political conditions and events, such as economic slowdowns or recessions, as well as factors specific to our business, have caused and could also continue to cause our stock price to decrease regardless of operating results. If we fail to meet expectations related to future growth, profitability, cash dividends, strategic transactions or other market expectations, the market price of our common stock may decline significantly. Additionally, our stock price may be adversely affected by transactions in our common stock by significant shareholders, including EQT.

We expect that EQT will ultimately dispose of its ownership interest in us, representing approximately 5.3% of our outstanding common stock as of December 31, 2021, when it deems appropriate, but in no event later than November 12, 2023. There can be no assurance regarding the method by which EQT will dispose of its interest in or the actual timing of any such disposal.

However, any disposition by EQT, or any other significant shareholder, of our common stock in the public market, or the perception that such dispositions could occur, could adversely affect prevailing market prices for our common stock. Further, any delay by EQT in completing the disposition of its ownership interest in us could have an adverse effect on the market price for our common stock, which could affect investor confidence in us.

A reduced stock price affects, among other things, our cost of capital and could affect our ability to execute on future strategic transactions, as well as increase opportunities for investor activism or unsolicited third-party activity affecting us.

We cannot guarantee the timing, amount or payment of dividends on our common stock, and we may further reduce the amount of the cash dividend that we pay on our common stock or may not pay any cash dividends at all to our shareholders. Our ability to declare and pay cash dividends to our shareholders, if any, in the future will depend on various factors, many of which are beyond our control.

We are not required to declare and pay dividends to our common shareholders, and our Board previously has reduced, and in the future may decide to further reduce, the amount of the cash dividend that we pay on our common stock or may decide not to declare any dividends in the future. Although we have in the past paid regular cash dividends, any payment of future dividends will be at the sole discretion of our Board and will depend upon many factors, including the financial condition, earnings, liquidity and capital requirements of our operating subsidiaries, covenants associated with certain debt obligations, legal requirements, our leverage, regulatory constraints and other factors deemed relevant by our Board. We are also not entitled to pay any dividends on any junior securities, including any shares of our common stock, prior to paying the quarterly dividends payable to the holders of Equitrans Midstream Preferred Shares, including any previously accrued and unpaid dividends.

Your percentage of ownership in us may be diluted in the future.

In the future we may issue common stock or other equity to raise cash for our projects, operations, acquisitions or other purposes and may also acquire interests in other companies or assets by using one or more of cash, debt and/or our equity.

Any of these events may dilute your ownership interests in us, reduce our earnings per common share and have an adverse effect on the price of our common stock. The issuance of these new shares and the sale of additional shares from time to time could have the effect of depressing the market value for our common stock. The increase in the number of shares of our common stock outstanding or the issuance of other equity of us, and any resulting dilution, may cause holders to sell shares of our common stock or may create the perception that such sales may occur, either of which may adversely affect the market for, and the market value of, our common stock.

Your percentage ownership in us may also be diluted because of equity awards that we grant to our directors, officers and employees or otherwise as a result of equity issuances for acquisitions or capital market transactions. Our Management Development and Compensation Committee and our Board have authority to grant share-based awards to our employees under our employee benefit plans. Such awards will have a dilutive effect on our earnings per common share, which could adversely affect the market price of our common stock. From time to time, we issue share-based awards to our employees under our employee benefits plans.

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In addition, our Second Amended and Restated Articles of Incorporation authorize us to issue, without the approval of our shareholders, one or more classes or series of preferred stock that have such designations, powers, preferences and relative, participating, optional and other special rights, including preferences over our common stock respecting dividends and distributions, as our Board generally may determine. The terms of one or more classes or series of preferred stock could dilute the voting power or reduce the value of our common stock. Similarly, the repurchase or redemption rights or liquidation preferences we could assign to holders of preferred stock could affect the residual value of our common stock.

As more fully described under “The Equitrans Midstream Preferred Shares by virtue of their terms and preferences present a number of risks to current and future holders of our common stock.”, upon the occurrence of certain events or the passage of time, the Equitrans Midstream Preferred Shares may be converted by the holder or us, as applicable, initially on a one-for-one basis in the case of certain conversions by holders, subject to certain anti-dilution adjustments and an adjustment for any dividends that have accrued but not been paid when due and partial period dividends. If we or a holder of the Equitrans Midstream Preferred Shares convert Equitrans Midstream Preferred Shares into common stock, the conversion will have a dilutive effect on our earnings per share of common stock, which could adversely affect the market price of our common stock.

Anti-takeover provisions contained in our Second Amended and Restated Articles of Incorporation and Third Amended and Restated Bylaws, as well as provisions of Pennsylvania law, could impair an attempt to acquire us.

Our Second Amended and Restated Articles of Incorporation and Third Amended and Restated Bylaws contain provisions that could have the effect of rendering more difficult or discouraging an acquisition of us deemed undesirable by our Board. These include provisions:

•authorizing blank check preferred stock, which we could issue with voting, liquidation, dividend and other rights superior to those of our common stock;

•limiting the liability of, and providing indemnification to, our directors and officers;

•specifying that our shareholders may take action only at a duly called annual or special meeting of shareholders and otherwise in accordance with our bylaws and prohibiting our shareholders from calling special meetings;

•requiring advance notice of proposals by our shareholders for business to be conducted at shareholder meetings and for nominations of candidates for election to our Board; and

•controlling the procedures for conduct of our Board and shareholder meetings and election and appointment of our directors.

These provisions, alone or together, could deter or delay hostile takeovers, proxy contests and changes in control or management of us. As a Pennsylvania corporation, we are also subject to provisions of Pennsylvania law, including certain provisions of Chapter 25 of the Pennsylvania Business Corporation Law (PBCL), which, among other things, requires enhanced shareholder approval for certain transactions between us and a shareholder who is a party to the transaction or is treated differently from other shareholders and also prevents persons who become the beneficial owner of shares representing 20% or more of our voting power from engaging in certain business combinations without approval of our Board, and in some cases preventing consummation of the transaction for at least five years.

Any provision of our Second Amended and Restated Articles of Incorporation or Third Amended and Restated Bylaws or Pennsylvania law that has the effect of delaying or deterring a change in control of us could limit the opportunity for our shareholders to receive a premium for their shares of our common stock and also could affect the price that some investors are willing to pay for our common stock.

Our Third Amended and Restated Bylaws designate the state and federal courts sitting in the judicial district of the Commonwealth of Pennsylvania, County of Allegheny, as the sole and exclusive forum for certain types of actions and proceedings that may be initiated by our shareholders, which could discourage lawsuits against us and our directors and officers.

Our Third Amended and Restated Bylaws provide that, unless our Board otherwise determines, the state and federal courts sitting in the judicial district of the Commonwealth of Pennsylvania, County of Allegheny, will be the sole and exclusive forum for any derivative action or proceeding brought on behalf of us, any action asserting a claim of breach of a fiduciary duty owed by any director or officer or other employee of ours to us or our shareholders, any action asserting a claim against us or any director or officer or other employee of us arising pursuant to any provision of the PBCL or our Second Amended and Restated Articles of Incorporation or Third Amended and Restated Bylaws or any action asserting a claim against us or any director or officer or other employee of ours governed by the internal affairs doctrine. The choice of forum provision set forth in our Third Amended and Restated Bylaws does not apply to actions arising under the Securities Act or the Exchange Act.

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When applicable, this exclusive forum provision may limit the ability of our shareholders to bring a claim in a judicial forum that such shareholders find favorable for disputes with us or our directors or officers, which may discourage such lawsuits against us and our directors and officers. Alternatively, if a court outside of Pennsylvania were to find this exclusive forum provision inapplicable to, or unenforceable in respect of, one or more of the specified types of actions or proceedings described above, we may incur additional costs associated with resolving such matters in other jurisdictions, which could adversely affect our business, results of operations and financial condition.

The Equitrans Midstream Preferred Shares by virtue of their terms and preferences present a number of risks to current and future holders of our common stock.

Equitrans Midstream Preferred Shares present a number of risks to current and future holders of our common stock, including a preference in favor of holders of Equitrans Midstream Preferred Shares in the payment of dividends on our common stock, the risk of dilution occurring as a result of the conversion of the Equitrans Midstream Preferred Shares into our common stock and the ability of the holders of the Equitrans Midstream Preferred Shares to vote with the holders of our common stock on most matters, as well as the risk that the holders of the Equitrans Midstream Preferred Shares will have certain other class voting rights with respect to any amendment to our organizational documents that would be adverse (other than in a de minimis manner) to any of the rights, preferences or privileges of the Equitrans Midstream Preferred Shares.

We are party to a registration rights agreement with certain holders of the Equitrans Midstream Preferred Shares pursuant to which, among other things, we gave the Investors certain rights to require us to file and maintain one or more registration statements with respect to the resale of the Equitrans Midstream Preferred Shares and the shares of our common stock that are issuable upon conversion of the Equitrans Midstream Preferred Shares, and which, upon request by certain Investors party to the Registration Rights Agreement, will require us to initiate underwritten offerings for the Equitrans Midstream Preferred Shares and the shares of our common stock that are issuable upon conversion of the Equitrans Midstream Preferred Shares and use our best efforts to cause the Equitrans Midstream Preferred Shares to be listed on the securities exchange on which the shares of our common stock are then listed. See Note 2 to the consolidated financial statements for further information on the Equitrans Midstream Preferred Shares.

Risks Related to the Separation

If the Separation and Distribution, together with certain related transactions, does not continue to qualify as a transaction that is generally tax-free for U.S. federal income tax purposes, we, EQT, and our respective shareholders could be subject to significant tax liabilities and, in certain circumstances, we could be required to indemnify EQT for material taxes and other related amounts pursuant to indemnification obligations under the tax matters agreement.

It was a condition to the Distribution that (i) a private letter ruling from the IRS regarding the qualification of the Distribution, together with certain related transactions, as a transaction that is generally tax-free for U.S. federal income tax purposes under Sections 355 and 368(a)(1)(D) of the Code and certain other U.S. federal income tax matters relating to the Separation and Distribution shall not have been revoked or modified in any material respect and (ii) EQT received an opinion of counsel with respect to certain tax matters relating to the qualification of the Distribution, together with certain related transactions, as a transaction described in Sections 355 and 368(a)(1)(D) of the Code. The IRS private letter ruling is based upon and relies on, and the opinion of counsel is based upon and relies on, among other things, various facts and assumptions, as well as certain representations, statements and undertakings of EQT and us, including those relating to the past and future conduct of EQT and us. If any of these representations, statements or undertakings is, or becomes, inaccurate or incomplete, or if any representations or covenants contained in any of the Separation-related agreements and documents or in any documents relating to any IRS private letter ruling or opinion of counsel are breached, such IRS private letter ruling and/or opinion of counsel may be invalid and the conclusions reached therein could be jeopardized.

Notwithstanding receipt of the IRS private letter ruling and opinion of counsel, the IRS could determine that the Distribution and/or certain related transactions should be treated as taxable transactions for U.S. federal income tax purposes if it determines that any of the representations, assumptions or undertakings upon which such IRS private letter ruling or the opinion of counsel was based are false or have been violated. In addition, the IRS private letter ruling does not address all of the issues that are relevant to determining whether the Distribution, together with certain related transactions, continues to qualify as a transaction that is generally tax-free for U.S. federal income tax purposes, and the opinion of counsel represented the judgment of such counsel and is not binding on the IRS or any court and the IRS or a court may disagree with the conclusions in any opinion of counsel. Accordingly, notwithstanding receipt of an IRS private letter ruling or opinion of counsel, there can be no assurance that the IRS will not assert that the Distribution and/or certain related transactions do not qualify for the intended tax treatment or that a court would not sustain such a challenge. In the event the IRS were to prevail with such challenge we, EQT, and our respective shareholders could be subject to material U.S. federal income tax liability.

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Even if the Distribution otherwise qualifies as generally tax-free for U.S. federal income tax purposes under Section 355 and Section 368(a)(1)(D) of the Code, it would result in a material U.S. federal income tax liability to EQT (but not to its shareholders) under Section 355(e) of the Code if one or more persons acquire, directly or indirectly, a 50-percent or greater interest (measured by either vote or value) in EQT’s stock or in the stock of us as part of a plan or series of related transactions that includes the Distribution, and we may be required to indemnify EQT for any such liability under the tax matters agreement entered into by EQT and us in connection with the Distribution. The process for determining whether an acquisition is part of a plan under these rules is complex, inherently factual in nature and subject to a comprehensive analysis of the facts and circumstances of the particular case. Notwithstanding the IRS private letter ruling and opinion of counsel described above, a sufficient change in ownership of EQT or our common stock may occur which could result in a material tax liability to EQT.

Under the tax matters agreement that EQT entered into with us, we may be required to indemnify EQT against any additional taxes and related amounts resulting from (i) an acquisition of all or a portion of our equity securities or assets, whether by merger or otherwise (and regardless of whether we participated in or otherwise facilitated the acquisition), (ii) other actions or failures to act by us or (iii) any of our representations, covenants or undertakings contained in any of the Separation-related agreements and documents or in any documents relating to the IRS private letter ruling or the opinion of counsel being incorrect or violated. Any such indemnity obligations could be material.

If the IRS were to successfully assert that the EQM Merger or Share Purchases resulted in the Distribution and/or certain related transactions being treated as taxable transactions to EQT for U.S. federal income tax purposes, we may be required to indemnify EQT for such taxes and related amounts.

Certain contingent liabilities allocated to us following the Separation may mature, resulting in material adverse impacts to our business.

There are several significant areas where the liabilities of EQT may become our obligations. For example, under the Code and the related rules and regulations, each corporation that was a member of the EQT consolidated U.S. federal income tax return group during a taxable period or portion of a taxable period ending on or before the effective date of the Distribution is jointly and severally liable for the U.S. federal income tax liability of the EQT consolidated U.S. federal income tax return group for that taxable period. Consequently, if EQT is unable to pay the consolidated U.S. federal income tax liability for a pre-Separation period, we could be required to pay the amount of such tax, which could be substantial and in excess of the amount allocated to us under the tax matters agreement. Other provisions of federal law establish similar liability for other matters, including laws governing tax-qualified pension plans, as well as other contingent liabilities.

We or EQT may fail to perform under various transaction agreements that were executed as part of the Separation.

In connection with the Separation, we and EQT entered into a Separation and Distribution Agreement as well as various other agreements, including a tax matters agreement, an employee matters agreement and a shareholder and registration rights agreement with respect to EQT’s continuing ownership of our common stock. The Separation and Distribution Agreement, the tax matters agreement and the employee matters agreement determined the allocation of assets and liabilities between the companies following the Separation for those respective areas and include indemnification related to liabilities and obligations. If EQT is unable or unwilling to satisfy its obligations under these agreements, including its indemnification obligations, our business, results of operations and financial condition could be materially and adversely affected.

Potential indemnification liabilities to EQT pursuant to agreements relating to the Separation and Distribution could materially and adversely affect us.

The Separation and Distribution Agreement with EQT provides for, among other things, provisions governing the relationship between us and EQT with respect to and resulting from the Separation. Among other things, the Separation and Distribution Agreement provides for indemnification obligations designed to make us financially responsible for substantially all liabilities that may exist relating to our business activities, whether incurred prior to or after the Separation, as well as those obligations of EQT assumed by us pursuant to the Separation and Distribution Agreement. If we are required to indemnify EQT under the circumstances set forth in the Separation and Distribution Agreement, we may be subject to substantial liabilities. See also the discussion of potential indemnification obligations under “If the Separation and Distribution, together with certain related transactions, does not continue to qualify as a transaction that is generally tax-free for U.S. federal income tax purposes, we, EQT, and our respective shareholders could be subject to significant tax liabilities and, in certain circumstances, we could be required to indemnify EQT for material taxes and other related amounts pursuant to indemnification obligations under the tax matters agreement.”

Item 1B.    Unresolved Staff Comments

None.

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Item 2.        Properties

The Company leases its corporate headquarters office in Canonsburg, Pennsylvania.

The Company's real property falls into two categories: (i) parcels that it owns in fee and (ii) parcels in which its interest derives from leases, easements, rights-of-way, permits or licenses from landowners or governmental authorities permitting the use of such land for the Company's operations. Certain lands on which the Company's pipelines and facilities are located are owned by the Company in fee title, and the Company believes that it has satisfactory title to these lands. The remainder of the lands on which the Company's pipelines and facilities are located are held pursuant to surface leases or easements between the Company, as lessee or grantee, and the respective fee owners of the lands, as lessors or grantors. The Company has held, leased or owned many of these lands for many years without any material challenge known to the Company relating to the title to the land upon which the assets are located, and the Company believes that it has satisfactory leasehold estates, easement interests or fee ownership to such lands. The Company believes that it has satisfactory title to all of its material leases, easements, rights-of-way, permits and licenses, and the Company has no knowledge of any material challenge to its title to such assets or their underlying fee title.

As contemplated under “We do not own all of the land on which our pipelines and facilities are located, which could disrupt our operations and future development," included in "Item 1A. Risk Factors," there are, however, certain lands within the Company's storage pools as to which it may not currently have vested real property rights, some of which are subject to ongoing acquisition negotiations or inverse condemnation proceedings. In accordance with Equitrans, L.P.'s FERC certificates, the geological formations within which its permitted storage facilities are located cannot be used by third parties in any way that would detrimentally affect its storage operations, and the Company has the power of eminent domain with respect to the acquisition of necessary real property rights to use such storage facilities. Certain property owners have initiated legal proceedings against the Company and its affiliates for trespass, inverse condemnation and other claims related to these matters, and there is no assurance that other property owners will not initiate similar legal proceedings against the Company and its affiliates prior to final resolution.

See "Item 1. Business" for a discussion of the properties and their related business segments and map of the Company's operations.

Item 3.        Legal Proceedings

In the ordinary course of business, various legal and regulatory claims and proceedings are pending or threatened against the Company and its subsidiaries. While the amounts claimed may be substantial, the Company is unable to predict with certainty the ultimate outcome of such claims and proceedings. The Company accrues legal and other direct costs related to loss contingencies when incurred. The Company establishes reserves whenever it believes it to be appropriate for pending matters. Furthermore, after consultation with counsel and considering available insurance, the Company believes that the ultimate outcome of any matter currently pending against it or any of its consolidated subsidiaries will not materially affect its business, financial condition, results of operations, liquidity or ability to pay dividends to its shareholders.

Arbitration Decision in Hammerhead Pipeline Dispute

See “Hammerhead Pipeline” under “Outlook” in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” for additional information.

Environmental Proceedings

Pratt Storage Field. On October 31, 2018, a gas explosion occurred in Morgan Township, Greene County, Pennsylvania (the Incident). Following the explosion, the Pennsylvania Department of Environmental Protection (the PADEP), the Pennsylvania Public Utilities Commission and the PHMSA began investigating the Incident. In January 2020, the PADEP notified the Company that it was required to submit an investigation report pursuant to the state’s gas migration regulations due to the Incident's proximity to the Company's Pratt Storage Field assets. The Company, while disputing the applicability of the regulations, submitted a report to the PADEP in March 2020. In September 2020, the PADEP responded to the Company’s investigation report with a request for additional information. The Company responded to the September 2020 request, but cannot predict whether any action will ultimately be brought by the PADEP or what the outcome of such an action would be. If a penalty is imposed, it could result in monetary sanctions in excess of $300,000. However, the Company does not believe that the penalty, if imposed, will have a material impact on the financial condition, results of operations or liquidity of the Company.

Swarts Storage Field. On April 8, 2021, the PADEP notified the Company that it considered certain aspects of the storage field to be out of compliance due to an alleged failure to plug or recondition wells within 2,000 feet of ongoing coal mining activities by CONSOL Energy Inc. and that a number of wells on the property allegedly did not meet current plugging standards. The

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Company disputes these claims and is working with the PADEP and CONSOL Energy Inc. to resolve these issues. Based on the discussion with the PADEP, the Company anticipates a notice of violation (NOV) will be issued. If penalties are pursued and ultimately imposed, the penalties could result in monetary sanctions in excess of $300,000. However, the Company does not believe that the penalties, if imposed, would have a material impact on the Company's financial condition, results of operations or liquidity.

MVP Matters

The MVP Joint Venture is currently defending certain agency actions and judicial challenges to the MVP, any of which could affect the ability to complete or operate the project, including the following:

•Sierra Club, et al. Petitioners v. State Water Control Board, et al. Respondents and Mountain Valley Pipeline, Intervenor, Docket No. 21-2425, Fourth Circuit Court of Appeals (Fourth Circuit). On December 20, 2021, the Virginia Department of Environmental Quality (VADEQ) certified that the MVP project would satisfy Virginia’s water quality standards based on its comprehensive nine-month review of the MVP Joint Venture’s Joint Permit Application (VA 401 Permit). On December 22, 2021, Petitioners filed their petition challenging the VADEQ’s approval of the VA 401 Permit with the Fourth Circuit. On December 22, 2021, the Petitioners filed a request for an administrative stay with the VADEQ which was denied on January 4, 2022. On January 4, 2022, the Petitioners filed a petition with the Fourth Circuit seeking a judicial stay of the VA 401 Permit pending a decision on the merits. On February 11, 2022, Petitioners withdrew the stay petition. If the challenge were successful on its merits, it could result in the MVP Joint Venture's VA 401 Permit being delayed or vacated and/or additional legal proceedings, the outcome of which the Company cannot predict, and cause a delay or further delay in the targeted full in-service date for the MVP project (and consequent impacts related to such delay), or otherwise adverse effects.

•Sierra Club, et al. Petitioners v. West Virginia Department of Environmental Protection, et al. Respondents and Mountain Valley Pipeline, Intervenor, Docket No. 22-1008, Fourth Circuit. On December 30, 2021, the West Virginia Department of Environmental Protection (WVDEP) certified that the MVP project would satisfy West Virginia’s water quality standards based on its comprehensive nine-month review of the MVP Joint Venture’s Joint Permit Application (WV 401 Permit). On January 3, 2022, Petitioners filed their petition challenging the WVDEP’s approval of the WV 401 Permit with the Fourth Circuit. On January 4, 2022, the Petitioners filed a request for an administrative stay with the WVDEP which was denied on January 11, 2022. On January 11, 2022, Petitioners filed a petition with the Fourth Circuit seeking a judicial stay of the WV 401 Permit pending a decision on the merits. The stay petition was denied by the Fourth Circuit on February 8, 2022. If the challenge were successful on its merits, it could result in the MVP Joint Venture's WV 401 Permit being delayed or vacated and/or additional legal proceedings, the outcome of which the Company cannot predict, and cause a delay or further delay in the targeted full in-service date for the MVP project (and consequent impacts related to such delay), or otherwise adverse effects.

•Jefferson National Forest Crossing and Associated Authorizations. In a different Fourth Circuit appeal, Sierra Club, et al. v. U.S. Forest Service, et al., consolidated under Case No. 17-2399, Fourth Circuit, filed in December 2017, the Sierra Club challenged a Bureau of Land Management (BLM) decision to grant a right-of-way to the MVP Joint Venture and a U.S. Forest Service (USFS) decision to amend its management plan to accommodate the MVP, both of which affect the MVP's approximate 3.5-mile segment in the Jefferson National Forest (JNF) in Virginia. On July 27, 2018, agreeing in part with the Sierra Club, the Fourth Circuit vacated the BLM and USFS decisions, finding fault with the BLM's analysis of the practicality of alternate routes and the USFS' analysis of erosion and sedimentation effects. The USFS published a draft Supplemental Environmental Impact Statement (SEIS) to the 2017 FERC Final Environmental Impact Statement for MVP in the Federal Register on September 25, 2020 with a public comment period that closed on November 9, 2020. On December 11, 2020, the USFS published a Final SEIS that addressed the issues raised in the prior proceedings and evaluated the most recent sedimentation analysis submitted to the agency consistent with the findings presented in MVP’s Biological Opinion and Incidental Take Statement issued by the Department of the Interior's Fish and Wildlife Service (FWS) on September 4, 2020. See Appalachian Voices, et al. v. U.S. Dep’t of Interior below for additional information. On January 11, 2021, the MVP Joint Venture received final approval of the Record of Decision from the USFS and, on January 15, 2021, the BLM issued the required right-of-way permit for the MVP’s 3.5-mile segment in the JNF in Virginia (the JNF Right-of-Way). On January 11, 2021, Sierra Club, et al. filed a petition with the Fourth Circuit to reverse the USFS approval of the Record of Decision and, on January 15, 2021, filed a petition with the Fourth Circuit challenging BLM’s grant of the JNF Right-of-Way. See Wild Virginia, et al. v. United States Forest Service, et al., No. 21-1039(L). The Fourth Circuit consolidated the challenges to the Record of Decision and the JNF Right-of-Way and briefing was completed. Oral argument occurred on October 29, 2021. On January 25, 2022, the Fourth Circuit, agreeing in part with the petitioners, vacated and remanded the Record of Decision and the JNF Right-of-Way, finding fault with (i) the USFS’ and BLM’s consideration of certain data from the U.S. Geological Survey and (ii) the USFS’ and BLM’s authorization of the use of conventional bores for stream crossings within the JNF based on a variance issued by the FERC, and, as a result of such issues, (iii) the USFS’ amendments in connection with the Record of Decision to the Jefferson Forest plan. The

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vacatur of the Record of Decision and the JNF Right-of-Way may result in appellate and/or additional agency proceedings (the outcome of which the Company cannot predict) and has caused a delay in the targeted full in-service date for the MVP project (and consequent impacts relating to such delay). The Company cannot predict whether and when any new authorizations will be received from the USFS and BLM and, if received, the result of any challenge to such authorizations.

On August 3, 2018, citing the court's vacatur and remand in Sierra Club, et al. v. U.S. Forest Service, et al., consolidated under Case No. 17-2399, the FERC issued a stop work order for the entire pipeline pending the agency actions on remand. The FERC modified its stop work order on August 29, 2018 to allow work to continue on all but approximately 25 miles of the project (the Exclusion Zone). On October 10, 2018, the Fourth Circuit granted a petition for rehearing filed by the MVP Joint Venture for the limited purpose of clarifying that the July 27, 2018 order did not vacate the portion of the BLM's Record of Decision authorizing a right-of-way and temporary use permit for the MVP to cross the Weston and Gauley Bridge Turnpike Trail in Braxton County, West Virginia. On October 15, 2018, the MVP Joint Venture filed with the FERC a request to further modify the August 3, 2018 stop work order to allow the MVP Joint Venture to complete the bore and install the pipeline under the Weston and Gauley Bridge Turnpike Trail. On October 24, 2018, the FERC granted the MVP Joint Venture's request to further modify the stop work order and authorize construction. Additionally, on October 9, 2020, the FERC authorized construction to resume project-wide (as it had been stopped by the FERC on October 15, 2019 in relation to a separate matter discussed below), other than with respect to the Exclusion Zone, which requires additional authorization. On December 17, 2020, the FERC again modified the stop work order and authorized construction to resume in 17 miles of the Exclusion Zone. The Company cannot guarantee whether or when the FERC will act in respect of any or all of the remaining portions of the Exclusion Zone. The FERC's October 9, 2020 and December 17, 2020 actions are the subject of challenges filed by the Sierra Club in Sierra Club, et al. v. FERC, Case No. 20-1512 (consolidated with No. 21-1040), D.C. Circuit Court of Appeals on December 22, 2020 and January 25, 2021, respectively (a stay request filed by the Sierra Club on January 29, 2021 was denied by the Court of Appeals for the D.C. Circuit (DC Circuit) on February 19, 2021). Briefing in Sierra Club, et al. v. FERC, Case No. 20-1512 (consolidated with No. 21-1040), D.C. Circuit Court of Appeals was completed in January 2022 and oral argument is scheduled for April 7, 2022. If any of the challenges to the FERC's October 9, 2020 and December 17, 2020 orders are successful, it could result in the FERC's orders being vacated and/or additional agency proceedings (the outcome of which the Company cannot predict) and cause a delay or further delay in the targeted full in-service date for the MVP project (and consequent impacts relating to such delay), or otherwise adverse effects.

•Challenges to FERC Certificate, Court of Appeals for DC Circuit. Multiple parties have sought judicial review of the FERC's order issuing a certificate of public convenience and necessity to the MVP Joint Venture and/or the exercise by the MVP Joint Venture of eminent domain authority. On February 19, 2019, the DC Circuit issued an order rejecting multiple consolidated petitions seeking direct review of the FERC order under the NGA and certain challenges to the exercise by the MVP Joint Venture of eminent domain authority in Appalachian Voices, et al. v. FERC, et al., consolidated under Case No. 17-1271. No petitions for rehearing or petitions for rehearing en banc were filed by the April 5, 2019 deadline. The mandate was issued on April 17, 2019. Another group of parties filed a complaint in the U.S. District Court for the District of Columbia asserting that the FERC's order issuing certificates is unlawful on constitutional and other grounds in Bold Alliance, et al. v. FERC, et al., Case No. 17-1822. The district court plaintiffs sought declaratory relief as well as an injunction preventing the MVP Joint Venture from developing its project or exercising eminent domain authority. In December 2017 and January 2018, the FERC and the MVP Joint Venture, respectively, moved to dismiss the petitions for lack of subject matter jurisdiction. The court granted the motion and dismissed plaintiffs' complaint on September 28, 2018. On October 26, 2018, plaintiffs appealed the decision in Case No. 17-1822 to the DC Circuit in Bold Alliance, et al. v. FERC, et al., Case No. 18-5322. On December 3, 2018, the FERC, as appellee, filed a joint motion with the appellants to hold Case No. 18-5322 in abeyance pending completion of the appeals of the final agency orders related to the MVP certificate in consolidated Case No. 17-1271 and Atlantic Coast Pipeline’s (ACP) certificate. The MVP Joint Venture filed a motion to dismiss the case as to some of the plaintiffs. On February 15, 2019, the DC Circuit entered an order holding this appeal in abeyance pending rulings on the appeals from the ACP and MVP FERC proceedings. Although the members of the ACP project announced the cancellation of that project on July 5, 2020, ACP's proceeding remains pending. Case No. 18-5322 remains in abeyance. Similarly, another group of parties filed a complaint in the U.S. District Court for the District of Columbia in Bohon et al. v. FERC et al., Case No. 20-00006, asserting that the delegation of authority to FERC under the NGA violates the nondelegation doctrine and separation-of-powers principle of the U.S. Constitution. The MVP Joint Venture and the FERC filed motions to dismiss which were granted by the court. On July 6, 2020, the landowners filed a notice of appeal to the DC Circuit in Case No. 20-5203. On November 30, 2020, appellants asked the DC Circuit to overturn the decision of the lower court. Oral argument before the DC Circuit was scheduled for March 29, 2021, but the court cancelled and held oral argument in abeyance and directed the parties to file motions to govern future proceedings following a decision by the U.S. Supreme Court in PennEast Pipeline Co. v. New Jersey, Case No. 19-1039, which decision was published on June 29, 2021. Briefing in Bohon et al. v. FERC et al., Case No.

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20-00006 on the significance of the PennEast Pipeline Co. opinion was completed on July 29, 2021. The DC Circuit issued an order on September 15, 2021 denying appellants' motion for summary reversal of the decision of the lower court and supplemental briefing was completed as of October 6, 2021. Oral argument occurred on December 15, 2021 and the parties are awaiting a decision. Due to the uncertainty regarding the timing of permitting and the outcome of legal challenges facing the MVP project, on August 25, 2020, the MVP Joint Venture filed a request with the FERC for and, on October 9, 2020, the FERC granted, an extension of time to complete the MVP project for an additional two years through October 13, 2022. On December 22, 2020, a challenge to the FERC’s action to grant an extension of time to complete the MVP project was filed in the DC Circuit in Sierra Club, et al. v. FERC, Case No. 20-1512 (consolidated with No. 21-1040, DC Circuit). On January 29, 2021, Sierra Club requested a stay of the FERC’s action to grant the MVP Joint Venture an extension of time to complete the MVP project from the DC Circuit, which stay request was denied by the DC Circuit on February 19, 2021. Briefing in Sierra Club, et al. v. FERC, Case No. 20-1512 (consolidated with No. 21-1040, D.C. Circuit), was completed in January 2022 and oral argument is scheduled for April 7, 2022. If any of these challenges were successful, it could result in the MVP Joint Venture's certificate of public convenience and necessity being vacated and/or additional proceedings before the FERC, the outcome of which the Company cannot predict, and cause a delay or further delay in the targeted full in-service date for the MVP project (and consequent impacts related to such delay), or otherwise adverse effects.

•Appalachian Voices, et al. v. U.S. Dep’t of Interior, et al., Fourth Circuit Court of Appeals, Case No. 20-2159. In August 2019, Wild Virginia and certain other petitioners filed a petition in the Fourth Circuit in Wild Virginia et al. v. United States Department of the Interior; Case No. 19-1866, to challenge the MVP Joint Venture’s Biological Opinion and Incidental Take Statement issued by FWS which was approved in November 2017 (the Original BiOp). On October 11, 2019, the Fourth Circuit issued an order approving the petitioners’ requested stay of the Original BiOp and holding the litigation in abeyance until January 11, 2020. On October 15, 2019, the FERC issued an order requiring the MVP Joint Venture to cease all forward-construction progress (the FERC modified this order on October 9, 2020 and December 17, 2020, which the Sierra Club has appealed to the DC Circuit as discussed above under "Jefferson National Forest Crossing and Associated Authorizations"). On September 4, 2020, FWS issued the MVP Joint Venture a new Biological Opinion and Incidental Take Statement (the New BiOp) for the MVP project and the Fourth Circuit subsequently dismissed the litigation regarding the Original BiOp. On October 27, 2020, Appalachian Voices et al. filed a petition with the Fourth Circuit challenging the New BiOp and filed a request for an administrative stay of the New BiOp with FWS, which FWS subsequently denied. On November 2, 2020, the petitioners filed a motion to stay the New BiOp with the Fourth Circuit. On November 18, 2020, the Fourth Circuit issued an order denying the requested stay. The matter was fully briefed as of March 19, 2021. Oral argument occurred on October 29, 2021. On February 2, 2022, the Fourth Circuit vacated and remanded the New BiOp holding, in part, that the FWS did not adequately analyze the environmental context for species at issue. The vacatur of the New BiOp may result in appellate and/or additional agency proceedings (the outcome of which the Company cannot predict) and has caused a delay in the targeted full in-service date for the MVP project (and consequent impacts relating to such delay). The Company cannot predict whether and when a new BiOp will be received from the FWS and, if received, the result of any challenge to such biological opinion.

Other Proceeding Relevant to the MVP Project

FERC Rulemaking on Construction Commencement. The MVP Joint Venture is a party to a FERC rulemaking proceeding that may potentially affect when the MVP Joint Venture is permitted to commence the crossings of streams and wetlands utilizing trenchless construction methods following the FERC’s issuance of its amended Certificate for the MVP project, as described above in "Strategy" under "Developments, Market Trends and Competitive Conditions" in "Item 1. Business." On May 4, 2021, the FERC issued Order No. 871-B. Order No. 871-B and its predecessors relate to an industry-wide rulemaking regarding construction commencement while a rehearing request is pending before the FERC. The MVP Joint Venture filed a request for clarification or rehearing of the certificate amendment aspects of Order No. 871-B with the FERC on June 3, 2021. The FERC issued Order No. 871-C on August 2, 2021. The Company cannot predict the impact of Order No. 871 and its progeny, or the FERC policies discussed in "Regulatory Environment - FERC Regulation" under "Item 1. Business.", on the MVP project, if any.

MVP Southgate Matters

The MVP Joint Venture is currently challenging or defending certain agency actions and judicial challenges to the MVP Southgate project that must be resolved in connection with the project, in addition to working to address matters affecting the MVP, including the following:

•Sierra Club et al. v. FERC; Case No. 20-1427, DC Circuit. On June 18, 2020, the FERC issued an order granting a certificate of public convenience and necessity for the MVP Southgate project. However, the FERC, while authorizing the project, directed the Office of Energy Projects not to issue a notice to proceed with construction until necessary federal permits are received for the MVP project and the Director of the Office of Energy Projects lifts the stop-work

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order and authorizes the MVP Joint Venture to continue constructing the MVP project. Certain opposition parties subsequently requested rehearing of the certificate order. On August 20, 2020, the FERC issued an order denying requests for rehearing of that certificate order, and on September 17, 2020, the FERC issued an order addressing the arguments raised on rehearing. On October 9, 2020, Sierra Club, among other petitioners, filed an appeal of these orders with the DC Circuit. The matter has been fully briefed and oral argument was held on January 19, 2022 and the parties are awaiting a decision. If this challenge were successful, it could result in the MVP Southgate project’s certificate of public convenience and necessity being vacated and/or additional proceedings before the FERC, the outcome of which the Company cannot predict, and cause a further delay to the MVP Southgate project (and consequent impacts relating to such delay), or otherwise adverse effects.

•Mountain Valley Pipeline, LLC v. North Carolina Department of Environmental Quality, No. 20-1971, Fourth Circuit Court of Appeals. On August 11, 2020, the North Carolina Department of Environmental Quality (NCDEQ) denied the MVP Southgate project’s application for a Clean Water Act Section 401 Individual Water Quality Certification and Jordan Lake Riparian Buffer Authorization and such denial was reissued by the NCDEQ on April 29, 2021. See "MVP Southgate Project" under "Developments, Market Trends and Competitive Conditions" in "Item 1. Business" for additional information. The Company is evaluating next steps, including the submission of a new application for a Clean Water Act Section 401 Individual Water Quality Certification and Jordan Lake Riparian Buffer Authorization for the MVP Southgate project, but cannot guarantee whether a new application, if submitted, will ultimately be approved or, if approved, whether conditions may be included as part of such approval or whether the application would then be further challenged.

•Mountain Valley Pipeline, LLC v. State Air Pollution Control Board et al., U.S. Court of Appeals for the Fourth Circuit. On December 3, 2021, the Virginia State Air Pollution Control Board (VAPCB) voted 5-2 to deny the air permit for the MVP Southgate project’s Lambert Compressor Station (the Lambert Air Permit). On December 31, 2021, the MVP Joint Venture filed a Petition for Review in the Fourth Circuit to review the VAPCB’s December 3, 2021 denial of the Lambert Air Permit. The Company anticipates that the matter will be fully briefed by April 26, 2022. The Company cannot guarantee whether the MVP Joint Venture’s appeal will be successful and, if it were successful, and if the Lambert Air Permit were issued, that the decision or permit would not be further challenged and what the outcome or impact of any such challenge would be.

Item 4.        Mine Safety Disclosures

Not applicable.

Information About Our Executive Officers

Name	Age	Year Initially Elected as Executive Officer	Title
Thomas F. Karam	63	2018	Chief Executive Officer
Diana M. Charletta	49	2018	President and Chief Operating Officer
Kirk R. Oliver	64	2018	Senior Vice President and Chief Financial Officer
Stephen M. Moore	62	2019	Senior Vice President and General Counsel
Brian P. Pietrandrea	47	2019	Vice President and Chief Accounting Officer

Mr. Karam was appointed Chief Executive Officer and Chairman of the Board of Equitrans Midstream in July 2019. Prior to that, Mr. Karam served as President and Chief Executive Officer of Equitrans Midstream since September 2018 and a Director since November 2018. Prior to his service at Equitrans Midstream, he served as senior vice president, EQT and president, midstream from August 2018, serving in those capacities until the Separation. Mr. Karam served as chief executive officer and chairman of the EQM General Partner from July 2019 until the EQM Merger in June 2020, chairman, president and chief executive officer, from October 2018 to July 2019, and as president, chief executive officer and director, from August 2018 to October 2018. Additionally, he served as chairman, president and chief executive officer of the general partner of EQGP from October 2018 through the consummation of the EQGP Buyout, as well as president, chief executive officer and director from August 2018 to October 2018. Mr. Karam served on EQT’s board of directors from November 2017 until the Separation. Mr. Karam is the founder and served as chairman of Karbon Partners, LLC, which invests in, owns, constructs, and operates midstream energy assets, from April 2017 to August 2018. Mr. Karam previously served as the founder, chairman and chief executive officer of the general partner of PennTex Midstream Partners, LP (PennTex), a publicly traded master limited partnership with operations in North Louisiana and the Permian Basin from 2014 until its sale to Energy Transfer Partners in 2016. Preceding PennTex, he was the founder, chairman and chief executive officer of Laser Midstream Partners, LLC, one of

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the first independent natural gas gathering systems in the northeast Marcellus Shale, from 2010 until 2012 when it was acquired by Williams Partners.

Ms. Charletta was appointed President and Chief Operating Officer of Equitrans Midstream in July 2019. She was appointed Executive Vice President and Chief Operating Officer of Equitrans Midstream in September 2018. She also served as executive vice president, chief operating officer and a director of the EQM General Partner from October 2018 through July 2019, when she was promoted to president and chief operating officer. She served as president, chief operating officer and director of the EQM General Partner through the EQM Merger. Ms. Charletta served as the executive vice president, chief operating officer and as a director of EQGP's general partner from October 2018 through the consummation of the EQGP Buyout. Ms. Charletta joined EQT in 2002 as a senior pipeline engineer and from that time held various management positions with increasing responsibility. She assumed the role of senior vice president of midstream operations of a subsidiary of EQT in December 2013 and was promoted to senior vice president of midstream engineering and construction in July 2017, a position she held until the Separation.

Mr. Oliver was appointed Senior Vice President and Chief Financial Officer of Equitrans Midstream in September 2018. He also served as senior vice president, chief financial officer and a director of the EQM General Partner from October 2018 through the EQM Merger. Mr. Oliver served as the senior vice president, chief financial officer and as a director of the general partner of EQGP from October 2018 through the EQGP Buyout. Prior to joining Equitrans Midstream, he was chief financial officer for UGI Corporation, which distributes, stores, transports and markets energy products and related services, from October 2012 through May 2018.

Mr. Moore was appointed Senior Vice President and General Counsel of Equitrans Midstream in April 2019. Prior to joining Equitrans Midstream, Mr. Moore was general counsel of PennTex Midstream Partners, LP, a publicly traded master limited partnership, from 2014 through 2017. From March 2018 to April 2019, Mr. Moore served as special projects counsel to UGI Corporation.

Mr. Pietrandrea was appointed as Vice President and Chief Accounting Officer of Equitrans Midstream in August 2019. He also served as vice president and chief accounting officer of the EQM General Partner from August 2019 through the EQM Merger. Mr. Pietrandrea also served as controller of certain subsidiaries of Equitrans Midstream effective upon the Separation until his promotion in August 2019. Prior to joining Equitrans Midstream, Mr. Pietrandrea served in various roles of increasing responsibility at a subsidiary of EQT, including director, partnership accounting and reporting, from October 2013 through February 2017, controller, from March 2017 through February 2018, and vice president and controller from March 2018 through the Separation.

All executive officers have executed agreements with the Company and serve at the pleasure of the Board. Officers are elected annually to serve during the ensuing year or until their successors are elected and qualified, or until their death, resignation or removal.

PART II

Item 5.        Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Equitrans Midstream common stock trades on the NYSE under the symbol "ETRN".

As of January 31, 2022, there were 1,827 shareholders of record of Equitrans Midstream common stock.

On January 24, 2022, the Board declared cash dividends for the fourth quarter of 2021 of $0.15 per common share and $0.4873 per Equitrans Midstream Preferred Share, which dividends were paid on February 14, 2022 to shareholders of record at the close of business on February 3, 2022.

As discussed under "We cannot guarantee the timing, amount or payment of dividends on our common stock, and we may further reduce the amount of the cash dividend that we pay on our common stock or may not pay any cash dividends at all to our shareholders. Our ability to declare and pay cash dividends to our shareholders, if any, in the future will depend on various factors, many of which are beyond our control.” included in "Item 1A. Risk Factors," the amount and timing of dividends is subject to the discretion of the Board and depends upon business conditions, including, but not limited to, the financial condition, results of operations, liquidity and capital requirements of the Company's operating subsidiaries, covenants associated with certain debt obligations, legal requirements and strategic direction and other factors deemed relevant by the Board. The Board has the discretion to change the dividend at any time for any reason.

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Securities Authorized for Issuance under Equity Compensation Plans

See “Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters” for information relating to the Company’s equity compensation plans.

Recent Sales of Unregistered Securities

See Notes 1 and 2 to the consolidated financial statements for a description of the Restructuring Agreement and Restructuring.

Market Repurchases

The Company did not have any repurchases of equity securities registered under Section 12 of the Exchange Act during the three months ended December 31, 2021.

Stock Performance Graph

The graph below compares the cumulative thirty-seven month total return provided to shareholders on Equitrans Midstream's common stock relative to the cumulative total returns of (i) the S&P 500 index and (ii) the Alerian US Midstream Energy Index. An investment of $100 (with reinvestment of all dividends) is assumed to have been made in Equitrans Midstream common stock on November 13, 2018, and with respect to each index, October 31, 2018, and relative performance is tracked through December 31, 2021.

	11/13/2018		12/31/2018		12/31/2019		12/31/2020		12/31/2021
Equitrans Midstream Corporation	$	100.00	$	95.84	$	71.75	$	47.88	$	66.20
S&P 500	100.00		92.82		122.05		144.51		185.99
Alerian U.S. Midstream Energy	100.00		89.60		103.54		77.70		112.67

Item 6.        Reserved

Item 7.        Management's Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis of financial condition and results of operations should be read in conjunction with “Item 1. Business,” “Item 1A. Risk Factors,” and the consolidated financial statements, and the notes thereto, included in "Item 8. Financial Statements and Supplementary Data" of this Annual Report on Form 10-K for the year ended December 31, 2021.

The information covered in this section provides a comparison of material changes in the Company's results of operations and financial condition for fiscal year 2021 and fiscal year 2020. For the discussion of fiscal year 2020 relative to fiscal year 2019, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" of the Company's Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on February 23, 2021.

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Executive Overview

Net loss attributable to Equitrans Midstream common shareholders was $1,439.0 million ($(3.32) per diluted share) in 2021 compared to net income attributable to Equitrans Midstream common shareholders of $364.4 million ($1.06 per diluted share) in 2020. The decrease resulted primarily from an impairment of the Company's equity method investment in the MVP Joint Venture, lower equity income from the Company's investment in the MVP Joint Venture, lower operating revenues on Gathering (primarily due to impacts of the EQT Global GGA) and Water, higher net interest expense, higher other expense and additional loss on extinguishment of debt charges, partially offset by lower income tax expense, lower net income attributable to noncontrolling interest and transaction costs recorded during 2020. See Note 4 and Note 6 to the consolidated financial statements for a discussion of the impairment of the Company's equity method investment in the MVP Joint Venture and deferred revenues under the EQT Global GGA, respectively.

COVID-19 Update

While the COVID-19 pandemic is continuing, the outbreak has had, and continues to have, a minimal direct impact on the Company’s overall operations. The Company continues to actively manage its response to the COVID-19 pandemic in collaboration with relevant parties and, given that the situation surrounding COVID-19 remains fluid, a number of Company-wide measures undertaken in response to COVID-19 remain in effect to continue to promote the safety and health of field and office-based employees and contractors.

On November 4, 2021, the U.S. Department of Labor's Occupational Safety and Health Administration (OSHA) issued an Emergency Temporary Standard (ETS) to carry out President Biden’s executive order requiring all employers with at least 100 employees to ensure that their employees are fully vaccinated or require unvaccinated workers to produce a negative test result at least once a week. On January 13, 2022, the U.S. Supreme Court granted an application to stay the ETS pending disposition of the applicants' petitions for review in the U.S. Court of Appeals for the Sixth Circuit. Effective January 26, 2022, OSHA withdrew the ETS as an enforceable emergency temporary standard, but did not withdraw the ETS as a proposed rule. Should the ETS, or a similar state or local requirement, take effect in the future, the Company expects it would be subject to such regulation concerning COVID-19 vaccination or testing. In that case, the Company may be required to implement a requirement that many or most employees get vaccinated, subject to limited exceptions, or be tested, resulting in additional costs to the Company. At this time, it is not possible to predict the impact that a vaccine or testing requirement would have on the Company or its workforce. Any such mandate may result in increased costs, operational disruptions or employee attrition for the Company. See “The loss or disengagement of key personnel could adversely affect our ability to execute our strategic, operational and financial plans.” under "Item 1A. Risk Factors" in this Annual Report on Form 10-K for the year ended December 31, 2021.

Notwithstanding the outbreak’s minimal direct impact to date on the Company’s overall operations, the Company acknowledges that the COVID-19 pandemic is still ongoing and therefore the Company cannot predict that the pandemic, or further developments regarding variants of COVID-19 or other governmental action, will not have any impact in the future on the Company's business, results of operations or financial position. For further information regarding the potential impact of COVID-19 on the Company, see "The ongoing outbreak of COVID-19 and its variant strains (or any future pandemic) could harm our business, results of operations and financial condition." under "Item 1A. Risk Factors" and "Item 1. Business" in this Annual Report on Form 10-K for the year ended December 31, 2021.

Sustainability and Corporate Responsibility

The Company recognizes that the long-term interests of shareholders are served by managing ESG matters important to the Company’s stakeholders and working to be resilient and appropriately positioned in any environment, including a lower-carbon economy. The Company has, throughout its corporate history, embraced conducting business in a socially responsible and ethical manner by respecting all stakeholders, and is focused on identifying and executing on ESG and sustainability initiatives while further integrating corporate responsibility and ESG concerns into its business strategy and decision-making throughout the organization. The Company also is committed to continuing to operate with integrity, accountability and transparency. As a result, the Company anticipates that its allocation of capital resources to ESG and sustainability initiatives will increase in the future, which the Company believes will distinctively position the Company and create value.

The Company believes that natural gas will remain a significant component of the global and national energy complex and will play a vital role in the transformation to a lower-carbon economy, notwithstanding increased demand for alternative energy sources. However, the Company acknowledges the reality and risks of climate change as one of the most critical current issues. As an energy infrastructure company, the Company recognizes the ongoing developments and risks surrounding climate change, as well as corresponding potential opportunities, and that it must continue to focus on long-term sustainable performance, including working to minimize impacts to the environment and society, such as by aggressively pursuing its

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climate change mitigation targets while also balancing the immediate and increasing need to deliver reliable, safe, and affordable natural gas energy in the United States now and in the future.

The Company is focused on incorporating sustainability-focused risks and opportunities into the Company’s strategic and capital spending decision processes. For example, among other initiatives, in 2021 the Company made investments to replace certain high-bleed pneumatic devices with low-bleed pneumatic devices and replace certain gas-driven pneumatics with instrument air systems so as to reduce pneumatic methane emissions relative to 2019 levels in support of its publicized climate policy and methane reduction targets. The Company expects to continue to pursue strategic sustainability initiatives as appropriate, including with respect to climate change, and to incur costs and capital expenditures to do so, and certain of such future costs and capital expenditures could be material.

As discussed in “Our business is subject to climate change-related transitional risks (including evolving climate-focused regulation and climate change-driven trends emphasizing financing non-fossil fuel businesses and prompting pursuit of emissions reductions, lower-carbon technologies and alternative forms of energy) and physical risks that could significantly increase our operating expenses and capital costs, adversely affect our customers’ development plans, and reduce demand for our products and services.” in “Item 1A. Risk Factors” and “Regulatory Environment” in “Item 1. Business”, the Company recognizes the evolving landscape of international accords and federal, state and local laws and regulations regarding GHG emissions or climate change initiatives. Changing market conditions, competition from lower emitting fuels, new laws and regulatory requirements, as well as unanticipated or inconsistent application of existing laws and regulations by administrative agencies, make it difficult to predict the long-term business impact of GHG emission and climate change initiatives on the Company’s liquidity, capital resources, results of operations and financial condition. However, the Company is taking steps to adjust its approach to capital investment given regulatory change and recognizes that responsive adaptation efforts are likely to be costly and time consuming.

Business Segment Results

Operating segments are revenue-producing components of an enterprise for which separate financial information is produced internally and is subject to evaluation by the chief operating decision maker in deciding how to allocate resources. Headquarters costs consist primarily of transaction costs and other unallocated corporate expenses. Net interest expense, components of other (expense) income, net, and income tax (benefit) expense are managed on a consolidated basis. The Company has presented each segment's operating income (loss), unrealized (loss) gain on derivative instruments, equity income, impairment of equity method investment and various operational measures in the following sections. Management believes that the presentation of this information is useful to management and investors regarding the financial condition, results of operations and trends and uncertainties of its segments. The Company has reconciled each segment's operating income (loss) to the Company's consolidated operating income and net (loss) income in Note 5 to the consolidated financial statements.

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GATHERING RESULTS OF OPERATIONS

	Years Ended December 31,
	2021		2020		% Change	2019		% Change
FINANCIAL DATA	(Thousands, except per day amounts)
Firm reservation fee revenues (a)	$	468,156	$	595,720	(21.4)	$	581,118	2.5
Volumetric-based fee revenues	393,897		416,561		(5.4)	578,813		(28.0)
Total operating revenues	862,053		1,012,281		(14.8)	1,159,931		(12.7)
Operating expenses:
Operating and maintenance	99,625		87,388		14.0	96,740		(9.7)
Selling, general and administrative	94,776		93,070		1.8	80,822		15.2
Separation and other transaction costs	—		4,104		(100.0)	19,344		(78.8)
Depreciation	188,633		172,967		9.1	144,310		19.9
Amortization of intangible assets	64,819		63,195		2.6	53,258		18.7
Impairments of long-lived assets	—		55,581		(100.0)	854,307		(93.5)
Total operating expenses	447,853		476,305		(6.0)	1,248,781		(61.9)
Operating income (loss)	$	414,200	$	535,976	(22.7)	$	(88,850)	703.2
Other (expense) income, net (b)	$	(16,362)	$	16,460	(199.4)	$	—	100.0
OPERATIONAL DATA
Gathering volumes (BBtu per day)
Firm capacity(c)	5,216		4,652		12.1	3,351		38.8
Volumetric-based services	3,098		3,553		(12.8)	4,493		(20.9)
Total gathered volumes	8,314		8,205		1.3	7,844		4.6
Capital expenditures(d)	$	223,807	$	344,873	(35.1)	$	834,712	(58.7)

(a)For the years ended December 31, 2021 and 2020, firm reservation fee revenues included approximately $11.3 million and $15.0 million, respectively, of MVC unbilled revenues. There were no MVC unbilled revenues during the year ended December 31, 2019.

(b)Other (expense) income, net, includes the unrealized (loss) gain on derivative instruments associated with the Henry Hub cash bonus payment provision. See Note 12 to the consolidated financial statements for further information.

(c)Includes volumes up to the contractual MVC under agreements structured with MVCs. Volumes in excess of the contractual MVC are reported under Volumetric-based services.

(d)Includes approximately $14.1 million, $41.6 million and $25.9 million of capital expenditures related to noncontrolling interests in Eureka Midstream for the years ended December 31, 2021, 2020 and 2019, respectively.

Year Ended December 31, 2021 Compared to Year Ended December 31, 2020

Gathering operating revenues decreased by $150.2 million for the year ended December 31, 2021 compared to the year ended December 31, 2020. Firm reservation fee revenues decreased by $127.6 million primarily due to higher deferred revenue of $194.2 million primarily resulting from a cumulative adjustment associated with certain potential contract extensions impacting the estimated total consideration under the EQT Global GGA, partly offset by $54.3 million of increased MVC revenues resulting from the EQT Global GGA and $12.2 million of increased firm reservation revenues from other customers. See Note 6 to the consolidated financial statements for a discussion of deferred revenues under the EQT Global GGA. Volumetric-based fee revenues decreased by $22.7 million primarily due to lower gathered volumes, partially offset by higher compression revenues.

Gathering operating expenses decreased by $28.5 million for the year ended December 31, 2021 compared to the year ended December 31, 2020, primarily as a result of the impairments of gathering assets and customer-related intangible assets totaling $55.6 million, as described in Note 4 to the consolidated financial statements, and transaction costs associated with the EQM Merger and related transactions in 2020, partially offset by increases in operating and maintenance, selling, general and

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administrative, depreciation expenses and amortization of intangible assets in 2021 compared to 2020. Operating and maintenance expense increased by $12.2 million primarily as a result of an increase in repairs and maintenance expense and personnel costs. Selling, general and administrative expense increased by $1.7 million primarily due to legal fees associated with the Hammerhead pipeline arbitration and personnel costs. Depreciation expense increased by $15.7 million as a result of additional assets placed in-service.

See "Outlook" and Note 4 to the consolidated financial statements for further discussion of the impairment of long-lived assets. See also Part II, "Item 7A. Quantitative and Qualitative Disclosures About Market Risk" of this Annual Report on Form 10-K for discussions of certain customer production curtailments during 2020 and Note 6 to the consolidated financial statements for discussions of the EQT Global GGA and the transactions related thereto, including the gathering fee relief to EQT thereunder. As was the case for the Gathering operating revenues during certain portions of 2021, the Company expects that the operating revenues resulting from the MVCs under the EQT Global GGA will increase the proportion of the Company's total operating revenues that are firm reservation fee revenues, and correspondingly decrease the portion of the Company's total operating revenues that are volumetric-based fee revenues, in future periods. Firm reservation fee revenues under the Company’s Hammerhead gathering agreement with EQT are also expected to contribute to an increase in the Company’s firm reservation fee revenues following achievement of the Hammerhead pipeline full commercial in-service. See also “Outlook” for a discussion of the arbitration decision issued in the Hammerhead pipeline dispute with EQT.

TRANSMISSION RESULTS OF OPERATIONS

	Years Ended December 31,
	2021		2020		% Change	2019		% Change
FINANCIAL DATA	(Thousands, except per day amounts)
Firm reservation fee revenues	$	366,323	$	364,533	0.5	$	356,569	2.2
Volumetric-based fee revenues	33,879		29,303		15.6	33,951		(13.7)
Total operating revenues	400,202		393,836		1.6	390,520		0.8
Operating expenses:
Operating and maintenance	33,883		37,635		(10.0)	33,989		10.7
Selling, general and administrative	36,483		26,292		38.8	26,865		(2.1)
Depreciation	55,310		54,540		1.4	51,935		5.0
Total operating expenses	125,676		118,467		6.1	112,789		5.0
Operating income	$	274,526	$	275,369	(0.3)	$	277,731	(0.9)
Equity income	$	17,579	$	233,833	(92.5)	$	163,279	43.2
Impairment of equity method investment	$	(1,926,402)	$	—	100.0	$	—	—
OPERATIONAL DATA
Transmission pipeline throughput (BBtu per day)
Firm capacity reservation	2,960		2,932		1.0	2,823		3.9
Volumetric-based services	11		16		(31.3)	90		(82.2)
Total transmission pipeline throughput	2,971		2,948		0.8	2,913		1.2
Average contracted firm transmission reservation commitments (BBtu per day)	4,082		4,087		(0.1)	3,966		3.1
Capital expenditures (a)	$	25,977	$	45,219	(42.6)	$	59,313	(23.8)

(a)Transmission capital expenditures do not include capital contributions made to the MVP Joint Venture for the MVP and MVP Southgate projects of approximately $287.7 million, $272.8 million and $774.6 million for the years ended December 31, 2021, 2020 and 2019, respectively.

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Year Ended December 31, 2021 Compared to Year Ended December 31, 2020

Transmission operating revenues increased by $6.4 million for the year ended December 31, 2021 compared to the year ended December 31, 2020. Firm reservation fee revenues increased by $1.8 million primarily due to customers contracting for additional firm transmission capacity. Volumetric-based fee revenues increased $4.6 million primarily due to higher storage activities.

Operating expenses increased by $7.2 million for the year ended December 31, 2021 compared to the year ended December 31, 2020 primarily as a result of higher selling, general and administrative expense resulting from increased professional service fees and personnel costs, partly offset by lower operating and maintenance expense primarily due to operational efficiencies.

Equity income decreased by $216.3 million for the year ended December 31, 2021 compared to the year ended December 31, 2020 due to the decrease in the MVP Joint Venture's AFUDC on the MVP project.

In January 2021, the MVP Joint Venture temporarily suspended AFUDC on the MVP project due to a temporary reduction in growth construction activities. During the second quarter of 2021, the MVP Joint Venture resumed some AFUDC on the MVP project as certain growth construction activities resumed. The Company's equity income in future periods will be affected by the timing of the resumption of the remaining growth construction activities and associated AFUDC, and the timing of the completion of the MVP project, and such impact could be substantial.

Impairment of equity method investment includes the impairment of the Company's equity method investment in the MVP Joint Venture during the fourth quarter of 2021. See Note 4 for further information.

WATER RESULTS OF OPERATIONS

	Years Ended December 31,
	2021		2020		% Change	2019		% Change
FINANCIAL DATA	(Thousands)
Firm reservation fee revenues	$	5,063	$	41,798	(87.9)	$	11,190	273.5
Volumetric-based fee revenues	49,719		62,910		(21.0)	68,601		(8.3)
Total operating revenues	54,782		104,708		(47.7)	79,791		31.2
Operating expenses:
Operating and maintenance	19,810		29,131		(32.0)	34,638		(15.9)
Selling, general and administrative	7,541		5,941		26.9	2,933		102.6
Depreciation	25,233		30,880		(18.3)	26,915		14.7
Impairment of long-lived assets	56,178		—		100.0	—		100.0
Total operating expenses	108,762		65,952		64.9	64,486		2.3
Operating (loss) income	$	(53,980)	$	38,756	(239.3)	$	15,305	153.2
OPERATIONAL DATA
Water services volumes (MMgal)
Firm capacity reservation (a)	105		697		(84.9)	249		179.9
Volumetric-based services	1,015		1,219		(16.7)	1,559		(21.8)
Total water volumes	1,120		1,916		(41.5)	1,808		6.0
Capital expenditures	$	34,877	$	11,905	193.0	$	37,457	(68.2)

(a)    Includes volumes up to the contractual MVC under agreements structured with MVCs. Volumes in excess of the contractual MVC are reported under Volumetric-based services.

Year Ended December 31, 2021 Compared to Year Ended December 31, 2020

Water operating revenues decreased by $49.9 million for the year ended December 31, 2021 compared to the year ended December 31, 2020. Firm reservation fee revenues decreased by $36.7 million primarily as a result of decreased revenues associated with contractually lower MVCs. Volumetric-based fee revenues decreased $13.2 million primarily due to lower volumes as a result of decreased producer activity and decreased realized rates on a per gallon basis.

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Water operating expenses increased by $42.8 million for the year ended December 31, 2021 compared to the year ended December 31, 2020 primarily as a result of the impairment of long-lived assets totaling $56.2 million (as described in Note 4 to the consolidated financial statements) and higher selling, general and administrative expense due to higher personnel costs and professional service fees, partly offset by lower operating and maintenance expense of $9.3 million primarily due to overall lower customer activity resulting in lower fresh water and produced water costs.

The Company’s water services are directly associated with producers’ well completion activities and fresh and produced water needs (which are partially driven by horizontal lateral lengths and the number of completion stages per well). Therefore, the Water operating results traditionally fluctuate from year-to-year in response to producers’ well completion activities. The Company expects Water operating revenues to be higher for the year ending December 31, 2022 as compared to the year ended December 31, 2021 primarily due to the 2021 Water Services Agreement the Company entered into with EQT during the fourth quarter of 2021. The Company also expects that the revenues resulting from the ARC under the 2021 Water Services Agreement will increase the proportion of the Company's total water operating revenues that are firm reservation fee revenues, and correspondingly decrease the portion of the Company's total water operating revenues that are volumetric-based fee revenues, in future periods. See Note 6 to the consolidated financial statements for further discussion of the 2021 Water Services Agreement.

Other Income Statement Items

Other (Expense) Income, Net

Other (expense) income, net, decreased $33.3 million for the year ended December 31, 2021 compared to the year ended December 31, 2020 primarily as a result of a $32.8 million decrease in the fair value of derivative instruments associated with the Henry Hub cash bonus payment provision related to the impact of an assumed potential delay in the targeted full in-service date for the MVP project, partially offset by an increase in NYMEX Henry Hub natural gas future prices.

See also "Outlook" for a discussion of factors affecting the estimated fair value of the derivative asset attributable to the Henry Hub cash bonus payment provision.

Loss on Extinguishment of Debt

Loss on extinguishment of debt increased $16.2 million for the year ended December 31, 2021 compared to the year ended December 31, 2020. The Company incurred a loss on extinguishment of debt of $41.0 million during the year ended December 31, 2021 related to the payment of the Tender Offer premium and write off of unamortized discounts and financing costs related to the prepayment of the EQM Term Loans under, and termination of, the Amended 2019 EQM Term Loan Agreement and purchase of 2023 Notes in the Tender Offers. The Company incurred a loss on extinguishment of debt of $24.9 million during the year ended December 31, 2020 primarily related to the write off of unamortized discounts and financing costs on the ETRN Term Loan Credit Agreement. See Note 11 to the consolidated financial statements for additional discussion.

Net Interest Expense

Net interest expense increased by $71.3 million for the year ended December 31, 2021 compared to the year ended December 31, 2020 primarily due to higher interest expense of $88.3 million and $48.2 million associated with the 2021 Senior Notes and the 2020 Senior Notes, respectively, and decreased capitalized interest and AFUDC - debt of $13.6 million in the aggregate, partially offset by lower interest expense of $79.7 million primarily associated with the termination of the Amended 2019 EQM Term Loan Agreement and the ETRN Term Loan Credit Agreement, decreased borrowings under the Amended EQM Credit Facility and lower interest on the 2023 Notes as a result of the Tender Offers.

As a result of the issuance of the 2021 Senior Notes, and after taking into account the use of those proceeds to pay off other outstanding debt, the Company expects interest expense for the periods after the issuance of the 2021 Senior Notes to continue to be higher than comparable prior year periods.

See also Note 11 to the consolidated financial statements for a discussion of certain of the Company's outstanding debt.

Income Taxes

See Note 14 to the consolidated financial statements for an explanation of the changes in income tax expense and effective tax rate for the year ended December 31, 2021 compared to the year ended December 31, 2020.

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Net Income Attributable to Noncontrolling Interests

Net income attributable to noncontrolling interests decreased $200.4 million for the year ended December 31, 2021 compared to the year ended December 31, 2020 primarily as a result of the reduction in noncontrolling interest in connection with the EQM Merger and the Restructuring.

The Company recorded net income attributable to noncontrolling interest for the third-party ownership interests in EQM (including the EQM Series A Preferred Units) through the closing of the EQM Merger. Upon the closing of the EQM Merger on June 17, 2020, the Company's remaining noncontrolling interest consists solely of the third-party ownership interest in Eureka Midstream.

Capital Expenditures

See "Investing Activities" and "Capital Requirements" under "Capital Resources and Liquidity" for discussion of capital expenditures and capital contributions.

Outlook 

The Company's strategically-located assets overlay core acreage in the Appalachian Basin. The location of the Company's assets allows its producer customers to access major demand markets in the U.S. The Company is one of the largest natural gas gatherers in the U.S., and its largest customer, EQT, was the largest natural gas producer in the U.S. based on average daily sales volumes as of December 31, 2021. The Company maintains a stable cash flow profile, with approximately 64% of its operating revenues for the year ended December 31, 2021 generated by firm reservation fees. Further, the percentage of the Company's revenues that are generated by firm reservation fees is expected to increase in future years as a result of the 15-year term EQT Global GGA, which includes an MVC of 3.0 Bcf per day that became effective on April 1, 2020 and gradually steps up to 4.0 Bcf per day through December 2031 following the full in-service date of the MVP. This contract structure enhances the stability of the Company's cash flows and limits its exposure to customer volume variability.

The Company's principal strategy is to achieve greater scale and scope, enhance the durability of its financial strength and to continue to work to position itself for a lower carbon economy, which strategy the Company expects will drive future growth and investment. The Company is implementing its strategy by leveraging its existing assets, executing on its growth projects (including through potential expansion and extension opportunities), periodically evaluating strategically-aligned inorganic growth opportunities (whether within its existing footprint or to extend the Company's reach into the southeast United States and to become closer to key demand markets, such as the Gulf of Mexico LNG export market), and focusing on ESG and sustainability-oriented initiatives. Additionally, the Company is also continuing to focus on strengthening its balance sheet through:

•highly predictable cash flows backed by firm reservation fees;

•actions to de-lever its balance sheet;

•disciplined capital spending;

•operating cost control; and

•an appropriate dividend policy.

As part of its approach to organic growth, the Company is focused on its projects and assets outlined in "Strategy" under "Developments, Market Trends and Competitive Conditions" in "Item 1. Business," many of which are supported by contracts with firm capacity or MVC commitments.

The Company expects that the MVP project (should it be placed in-service), together with the Hammerhead pipeline and EEP, will primarily drive the Company's organic growth.

EQT Global GGA. On February 27, 2020, the Company announced the EQT Global GGA, which is a 15-year contract that includes, among other things, a 3.0 Bcf per day MVC (which gradually steps up to 4.0 Bcf per day through December 2031 following the full in-service date of the MVP) and the dedication of a substantial majority of EQT’s core acreage in southwestern Pennsylvania and West Virginia to the Company. Under the EQT Global GGA, EQT will receive certain gathering fee relief over a period of three years, conditioned to begin the first day of the quarter in which the full in-service date of the MVP occurs, subject to any exercise of the EQT Cash Option (as further described in Note 6 to the consolidated financial statements). Further, the EQT Global GGA provides for a fee credit to the gathering rate for certain gathered volumes that also

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receive separate transmission services under certain transmission contracts. The EQT Global GGA replaced 14 previous gathering agreements between EQT and the Company.

Under the EQT Global GGA, the performance obligation is to provide daily MVC capacity and as such the total consideration is allocated proportionally to the daily MVC over the life of the contract. In periods that the gathering MVC revenue billed will exceed the allocated consideration, the excess will be deferred to the contract liability and recognized in revenue when the performance obligation has been satisfied. While the 3.0 Bcf per day MVC capacity became effective on April 1, 2020, additional daily MVC capacity and the associated gathering MVC fees payable by EQT to the Company as set forth in the EQT Global GGA are conditioned upon the full in-service date of the MVP. There are ongoing legal and regulatory matters that affect the MVP project which have had and/or could have (as applicable) a material effect on the performance obligation, the allocation of the total consideration over the life of the contract and the gathering MVC fees payable by EQT under the contract.

Based on the Henry Hub natural gas forward strip prices as of February 18, 2022 and the terms of the Henry Hub cash bonus payment provision, and taking into account an assumed potential delay in the targeted full in-service date for the MVP project, the estimated fair value of the derivative asset attributable to the Henry Hub cash bonus payment provision has decreased and any adverse change in assumptions regarding the MVP project would decrease the estimated fair value of the derivative asset attributable to the Henry Hub cash bonus payment provision further, and such decrease may be substantial. For a discussion of the potential effect of hypothetical changes to the NYMEX Henry Hub natural gas future prices on the estimated fair value of the derivative asset attributable to the Henry Hub cash bonus payment provision, see "Commodity Prices" in Part II, "Item 7A. Quantitative and Qualitative Disclosures About Market Risk" of this Annual Report on Form 10-K. Changes in estimated fair value are recognized in other (expense) income, net, on the Company’s statements of consolidated comprehensive income.

For a discussion of the Company's commercial relationship with EQT and related considerations, including risk factors, see "Item 1A. Risk Factors." See also Note 6 to the consolidated financial statements for additional information regarding the EQT Global GGA and the transactions related thereto. For further discussion on litigation and regulatory challenges affecting the MVP project, see "Strategy" under "Developments, Market Trends and Competitive Conditions" in "Item 1. Business" and "Item 3. Legal Proceedings."

Hammerhead Pipeline. On September 23, 2020, EQT and certain affiliates of EQT instituted arbitration proceedings against the Company by filing a Demand for Arbitration with the American Arbitration Association. The arbitration arose out of the Hammerhead gathering agreement, pursuant to which the Company agreed to construct the Hammerhead pipeline and gather gas for EQT. EQT sought a declaratory judgment that it could exercise an early termination right and purchase the Hammerhead pipeline and related facilities under the terms of the Hammerhead gathering agreement. With its Demand for Arbitration, EQT also sought emergency relief, asking that an emergency arbitrator: (i) resolve the parties’ dispute on the merits by October 1, 2020; or (ii) alternatively, toll the contractual deadline for EQT’s exercise of its termination right, which was set to expire on October 11, 2020, until after the parties’ dispute was resolved. On October 6, 2020, the emergency arbitrator issued an order denying EQT’s request for emergency resolution on the merits but tolling the early termination deadline until the arbitration was resolved. The Company’s answer to the Notice of Arbitration was filed on October 8, 2020, and the parties participated in an arbitration hearing from June 28, 2021 to July 2, 2021.

On October 25, 2021, the three-member panel appointed to arbitrate the dispute issued a binding arbitration decision in favor of the Company. The arbitration panel unanimously determined that, under the Hammerhead gathering agreement, although the in-service date for the Hammerhead pipeline was delayed beyond October 1, 2020, such delay was caused by or attributable to force majeure and, accordingly, that EQT has no early termination right under the Hammerhead gathering agreement relating to the timing of Hammerhead pipeline in-service or related right to purchase the Hammerhead gathering pipeline and associated facilities. Given the arbitration panel’s determinations, the Company will not be entitled to charge EQT monthly firm capacity reservation fees under the Hammerhead gathering agreement unless and until Hammerhead pipeline full commercial in-service is achieved (which the Company expects in conjunction with full MVP in-service).

Potential Future Impairments. The accounting estimates related to impairments are susceptible to change, including estimating fair value which requires considerable judgment. For goodwill, management’s estimate of a reporting unit’s future financial results is sensitive to changes in assumptions, such as changes in stock prices, weighted-average cost of capital, terminal growth rates and industry multiples. Similarly, cash flow estimates utilized for purposes of evaluating long-lived assets and equity method investment (such as in the MVP Joint Venture) require the Company to make projections and assumptions for many years into the future for pricing, demand, competition, operating costs, commencement of operations, resolution of relevant legal and regulatory matters, and other factors. The Company evaluates long-lived assets and equity method investments for impairment when events or changes in circumstances indicate, in management’s judgment, that the carrying value of such assets may not be recoverable (meaning, in the case of its equity method investment, that such investment has suffered other-than-temporary declines in value under ASC 323). The Company believes the estimates and assumptions used in estimating its

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reporting units’, its long-lived assets' and its equity investment's fair values are reasonable and appropriate as of December 31, 2021; however, assumptions and estimates are inherently subject to significant business, economic, competitive, regulatory, judicial and other risks that could materially affect the calculated fair values and the resulting conclusions regarding impairments, which could materially affect the Company’s results of operations and financial position. Additionally, actual results could differ from these estimates and assumptions may not be realized. The Company also continues to evaluate and monitor the ongoing legal and regulatory matters affecting the MVP and MVP Southgate projects, as further described in Part I, “Item 3. Legal Proceedings” of this Annual Report on Form 10-K. Further adverse or delayed developments with respect to such matters or other adverse developments could require that the Company modify assumptions reflected in the probability-weighted scenarios of discounted future net cash flows (including with respect to the probability of success) utilized to estimate the fair value of its equity investment in the MVP Joint Venture, which could result in an other-than-temporary decline in value, resulting in an incremental impairment of that investment. See also Note 4 to the consolidated financial statements, as well as “Reviews of our goodwill, intangible and other long-lived assets and equity method investment in the MVP Joint Venture have resulted in significant impairment charges, and reviews of our goodwill, intangible and other long-lived assets and equity method investment in the MVP Joint Venture could result in future significant impairment charges.” included in “Item 1A. Risk Factors," and the Company's discussion of "Critical Accounting Estimates" included in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operation."

As of the filing of this Annual Report on Form 10-K, the Company cannot predict the likelihood or magnitude of any future impairment. For information on the Company's past impairments, see Note 4 to the consolidated financial statements.

For a discussion of capital expenditures, see "Capital Requirements" below.

Capital Resources and Liquidity

The Company's liquidity requirements are to finance its operations, its capital expenditures, potential acquisitions and other strategic transactions and capital contributions to joint ventures, including the MVP Joint Venture, to pay cash dividends and to satisfy any indebtedness obligations. The Company's ability to meet these liquidity requirements depends on the Company's cash flow from operations, the continued ability of the Company to borrow under its credit facilities and the Company's ability to raise capital in banking, capital and other markets. We believe that our cash on hand and future cash generated from operations, together with available borrowing capacity under our subsidiaries' credit facilities and our access to banking and capital markets, will provide adequate resources to fund our short-term and long-term capital, operating and financing needs. However, cash flow and capital raising activities may be affected by prevailing economic conditions in the natural gas industry and other financial and business factors (including those market forces discussed in “Our business is subject to climate change-related transitional risks (including evolving climate-focused regulation and climate change-driven trends emphasizing financing non-fossil fuel businesses and prompting pursuit of emissions reductions, lower-carbon technologies and alternative forms of energy) and physical risks that could significantly increase our operating expenses and capital costs, adversely affect our customers’ development plans, and reduce demand for our products and services." included in "Item 1A. Risk Factors"), some of which are beyond the Company's control. The Company's available sources of liquidity include cash from operations, cash on hand, borrowings under its subsidiaries' revolving credit facilities, issuances of additional debt and issuances of additional equity securities. As of December 31, 2021, pursuant to the terms of the Amended EQM Credit Facility, EQM would have been able to borrow approximately $1.1 billion under the Amended EQM Credit Facility. The amount the Company is able to borrow under the Amended EQM Credit Facility is bounded by a maximum consolidated leverage ratio. See Note 11 to the consolidated financial statements for further information regarding the Amended EQM Credit Facility.

See “Security Ratings” below for a discussion of EQM’s credit ratings during 2021. Based on EQM's credit rating levels, EQM has delivered credit support to the MVP Joint Venture in the form of letters of credit, which, in the case of the MVP project, is in the amount of approximately $219.7 million and is, in the case of the MVP Southgate, $14.2 million, in each case as of December 31, 2021 and which are subject to adjustment based on the applicable construction budget. In connection with delivering such letters of credit as replacement performance assurances, EQM's performance guarantees associated with the MVP and MVP Southgate projects were terminated. Additionally, pursuant to the EQT Global GGA, if EQM does not maintain minimum credit ratings from two of three credit rating agencies of at least Ba3 with respect to Moody's and BB- with respect to S&P and Fitch, EQM will be obligated to provide additional credit support in an amount equal to approximately $196 million to EQT in support of the potential payment obligation related to the EQT Cash Option (the Cash Option Letter of Credit). See "A further downgrade of EQM’s credit ratings, including in connection with the MVP project or customer credit ratings changes, which are determined by independent third parties, could impact our liquidity, access to capital, and costs of doing business." included in "Item 1A. Risk Factors."

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Operating Activities

Net cash flows provided by operating activities were $1,168.8 million for the year ended December 31, 2021 compared to $1,140.9 million for the year ended December 31, 2020. The increase was primarily driven by the timing of working capital receipts and payments.

Investing Activities

Net cash flows used in investing activities were $573.0 million for the year ended December 31, 2021 compared to $729.8 million for the year ended December 31, 2020. The decrease was primarily due to decreased capital expenditure spending on Eureka projects, the Hammerhead pipeline and various wellhead gathering and transmission projects, which was partially offset by an increase in capital contributions to the MVP Joint Venture consistent with timing of the resumption of certain growth construction activities on the MVP project. See “Capital Requirements” below for a discussion of forecasted 2022 capital expenditures and capital contributions to the MVP Joint Venture.

Financing Activities

Net cash flows used in financing activities were $669.2 million for the year ended December 31, 2021 compared to $291.4 million for the year ended December 31, 2020. For the year ended December 31, 2021, the primary uses of financing cash flows were the payment for retirement of the EQM Term Loans and termination of the Amended 2019 EQM Term Loan Agreement, net repayments on borrowings under the revolving credit facilities, the Company's purchase of an aggregate principal amount of $500 million of EQM's 2023 Notes pursuant to the Tender Offers and the payment of dividends to shareholders, while the primary source of financing cash flows was the issuance of the 2021 Senior Notes. For the year ended December 31, 2020, the primary source of financing cash flows was net proceeds from the 2020 Senior Notes issuance, while the primary uses of financing cash flows were the redemption of the EQM Series A Preferred Units, payment to retire the ETRN Term Loans, the payments of dividends and distributions to shareholders and unitholders and net payments of borrowings on the Amended EQM Credit Facility. The net proceeds from the 2020 Senior Notes were primarily used to repay borrowings on the First Amended EQM Credit Facility.

Capital Requirements

The gathering, transmission and storage and water services businesses are capital intensive, requiring significant investment to develop new facilities and to maintain and upgrade existing operations. 

The following represents the Company's material short-term and long-term cash requirements from contractual and other obligations as of December 31, 2021.

	Total		2022		2023 – 2024		2025 – 2026		2027 +
	(Thousands)
Long-term debt (a)	$	6,500,000	$	—	$	1,100,000	$	1,200,000	$	4,200,000
Credit facility borrowings (b)	505,000		—		505,000		—		—
Interest payments on senior notes (c)	2,646,375		340,375		630,854		519,031		1,156,115
Purchase obligations (d)	3,943		1,273		2,232		438		—
Operating lease obligations (e)	55,321		10,404		14,255		10,010		20,652
Other liabilities (f)	71,859		48,589		23,270		—		—
Total contractual and other obligations	$	9,782,498	$	400,641	$	2,275,611	$	1,729,479	$	5,376,767

(a)Includes $6.5 billion in aggregate principal amount of EQM's senior notes as of December 31, 2021. See Note 11 to the consolidated financial statements for further information.

(b)Credit facility borrowings were classified based on the termination date of the credit facility agreements. As of December 31, 2021, the Company had aggregate credit facility borrowings outstanding of approximately $225 million and $280 million under the Amended EQM Credit Facility and the 2021 Eureka Credit Facility, respectively. See Note 11 to the consolidated financial statements for further information.

(c)Interest payments exclude interest related to the Amended EQM Credit Facility and the 2021 Eureka Credit Facility as the interest rates on the credit facility borrowings are variable.

(d)Excludes purchase obligations of the MVP Joint Venture. Purchase obligations represent agreements to purchase goods or services that are enforceable, legally binding and specify all significant terms, including the approximate timing of the transaction. As of

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December 31, 2021, the Company's purchase obligations included commitments for capital expenditures, operating expenses and service contracts.

(e)Operating leases are primarily entered into for various office locations and compression equipment.

(f)Other liabilities represent accruals for short-term employee compensation and estimated payouts for the Company's various liability award plans as of December 31, 2021. See "Critical Accounting Estimates" below and Note 10 to the consolidated financial statements for discussion of factors that affect the ultimate amount of the payout of the Company's liability award plans.

Contractual and other obligations exclude purchase obligations of the MVP Joint Venture and dividends associated with the Equitrans Midstream Preferred Shares.

Capital expenditures in 2021 were approximately $286 million (including approximately $14 million attributable to the noncontrolling interest in Eureka Midstream). Capital contributions to the MVP Joint Venture in 2021 were approximately $288 million. Capital expenditures in 2022 are expected to be approximately $365 million to $415 million (including approximately $20 million attributable to the noncontrolling interest in Eureka Midstream). The Company expects to make capital contributions to the MVP Joint Venture in 2022 of approximately $175 million to $225 million for purposes of the MVP project related to work completed in late 2021 and ongoing work required for right-of-way maintenance and approximately $5 million for the MVP Southgate project. Capital contributions payable to the MVP Joint Venture are accrued upon the issuance of a capital call by the MVP Joint Venture. The Company's short-term and long-term capital investments may vary significantly from period to period based on the available investment opportunities, the timing of the construction of the MVP, MVP Southgate and other projects, and maintenance needs. The Company expects to fund short-term and long-term capital expenditures and capital contributions primarily through cash on hand, cash generated from operations, available borrowing capacity under its subsidiaries' credit facilities and its access to banking and capital markets.

Credit Facility Borrowings

See Note 11 to the consolidated financial statements for discussion of the Amended EQM Credit Facility, the 2021 Eureka Credit Facility, the prepayment and termination of the Amended 2019 EQM Term Loan Agreement and Former Eureka Credit Facility.

Security Ratings

The table below sets forth the credit ratings for EQM's debt instruments at December 31, 2021.

	EQM
	Senior Notes
Rating Service	Rating	Outlook
Moody's	Ba3	Negative
S&P	BB-	Stable
Fitch	BB	Negative

In January 2021, each of Moody's, S&P, and Fitch affirmed EQM's credit ratings in connection with the issuance of the 2021 Senior Notes. There were no changes to EQM's credit ratings during the year ended December 31, 2021. EQM's credit ratings are subject to revision or withdrawal at any time by the assigning rating organization, and each rating should be evaluated independently of any other rating. The Company cannot ensure that a rating will remain in effect for any given period of time or that a rating will not be lowered or withdrawn entirely by a credit rating agency if, in its judgment, circumstances so warrant. If any credit rating agency downgrades or withdraws EQM's ratings, including for reasons relating to the MVP project (such as delays in the targeted full in-service date of the MVP project or increases in such project’s targeted costs), EQM’s leverage or credit ratings of the Company's customers, the Company's access to the capital markets could become more challenging, borrowing costs will likely increase, the Company may be required to provide additional credit assurances (the amount of which may be substantial), including the Cash Option Letter of Credit, in support of commercial agreements such as joint venture agreements, and the potential pool of investors and funding sources may decrease. In order to be considered investment grade, a company must be rated Baa3 or higher by Moody's, BBB- or higher by S&P, or BBB- or higher by Fitch. All of EQM's credit ratings are considered non-investment grade.

Commitments and Contingencies

In the ordinary course of business, various legal and regulatory claims and proceedings are pending or threatened against the Company and its subsidiaries. While the amounts claimed may be substantial, the Company is unable to predict with certainty

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the ultimate outcome of such claims and proceedings. The Company accrues legal and other direct costs related to loss contingencies when incurred. The Company establishes reserves whenever it believes it to be appropriate for pending matters. Furthermore, after consultation with counsel and considering available insurance, the Company believes that the ultimate outcome of any matter currently pending against it or any of its consolidated subsidiaries will not materially affect its business, financial condition, results of operations, liquidity or ability to pay dividends to its shareholders.

See "The regulatory approval process for the construction of new midstream assets is very challenging, has significantly increased costs and delayed targeted in-service dates, and decisions by regulatory and judicial authorities in pending or potential proceedings are likely to impact our or the MVP Joint Venture's ability to obtain or maintain in effect all approvals and authorizations necessary to complete certain projects on the targeted time frame or at all or our ability to achieve the expected investment returns on the projects." included in "Item 1A. Risk Factors," and see "Item 3. Legal Proceedings" for discussion of litigation and regulatory proceedings, including related to the MVP and MVP Southgate projects.    

See Note 16 to the consolidated financial statements for further discussion of the Company's commitments and contingencies.

Dividends

On February 14, 2022, the Company paid cash dividends for the fourth quarter of 2021 of $0.15 per common share and $0.4873 per Equitrans Midstream Preferred Share to shareholders of record at the close of business on February 3, 2022.

Recently Issued Accounting Standards

Recently issued accounting standards relevant to the Company are described in Note 1 to the consolidated financial statements.

Critical Accounting Estimates

The Company's significant accounting policies are described in Note 1 to the consolidated financial statements, which have been prepared in accordance with GAAP. Preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the related disclosures of contingent assets and liabilities. The following accounting policies are considered critical due to the significant judgments and estimates used in the preparation of the Company's consolidated financial statements and the material impact on the results of operations or financial condition. Actual results could differ from those judgments and estimates.

Income Taxes. The Company recognizes deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the Company's consolidated financial statements or tax returns.

The Company has federal and state net operating loss (NOL) carryforwards related to federal and various state jurisdictions. The federal, commonwealth of Virginia and state of West Virginia NOL carryforwards have no expiration, but utilization is limited to 80% of taxable income in the year of utilization. The Company's Pennsylvania NOL carryforwards expire between 2038 and 2041. In addition to the NOL carryforwards, the Company has deferred tax assets and liabilities principally resulting from its investment in partnerships.

The Company believes that it is more likely than not that the benefit from its federal and state NOL carryforwards and reversals of the investment in partnership deferred tax asset, net of offsetting deferred tax liabilities, will not be realized. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not (greater than 50%) that a tax benefit will not be realized. In evaluating the need for a valuation allowance, management considers available evidence, both positive and negative, including potential sources of taxable income, income available in carry-back periods, future reversals of taxable temporary differences, projections of taxable income and income from tax planning strategies. Positive evidence includes reversing temporary differences and projection of future profitability within the carry-forward period, including from tax planning strategies. Negative evidence includes historical pre-tax book losses and Pennsylvania NOL expirations. A review of positive and negative evidence regarding these tax benefits resulted in the conclusion that valuation allowances on the Company’s federal and state NOL carryforwards and reversals of the investment in partnership deferred tax asset, net of offsetting deferred tax liabilities, were warranted as it was more likely than not that these assets will not be realized.

Deferred tax assets for which no valuation allowance is recorded may not be realized, and changes in facts and circumstances may result in the establishment of a valuation allowance. Existing valuation allowances are re-examined under the same standards of positive and negative evidence that apply to valuation allowance establishment. If it is determined that it is more likely than not that a deferred tax asset for which a valuation is recorded will be realized, all or a portion of the valuation allowance may be released. Deferred tax assets and liabilities are also re-measured to reflect changes in underlying tax rates from tax law changes. Any determination to change the valuation allowance would impact the Company's income tax (benefit) expense in the period in which such a determination is made.

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Tax benefits related to uncertain tax positions taken or expected to be taken on a tax return are recorded when such benefits meet a more likely than not threshold; otherwise, the tax benefit is recorded when the tax position has been effectively settled, either because the statute of limitations has expired or the appropriate taxing authority has completed its examination. Interest and penalties related to uncertain tax positions are recognized as part of the provision for income taxes and are accrued in the period that such interest and penalties would be applicable under relevant tax law until such time that the related tax benefits are recognized.

The Company believes that accounting estimates related to income taxes are "critical accounting estimates" because the Company must assess the likelihood that deferred tax assets will be recovered from future taxable income, exercise judgment when evaluating whether or not a valuation allowance must be established on deferred tax assets and exercise judgment regarding the amount of financial statement impact to record for uncertain tax positions. To the extent that a valuation allowance or an uncertain tax position is established or changed during a period, the Company records the impact within income tax (benefit) expense on the statements of consolidated comprehensive income. See Note 14 to the consolidated financial statements for additional information.

Property, Plant and Equipment. Determination of depreciation requires judgment regarding the estimated useful lives and salvage values of property, plant and equipment. The Company has not historically experienced material changes in its results of operations from changes in the estimated useful lives or salvage values of its property, plant and equipment; however, these estimates are reviewed periodically, including each time Equitrans, L.P. files with the FERC for a change in its transmission, storage and gathering rates. The Company believes that the accounting estimate related to depreciation is a "critical accounting estimate" because the assumptions used to estimate useful lives and salvage values of property, plant and equipment are susceptible to change. These assumptions affect depreciation expense and, if changed, could have a material effect on the Company's results of operations and financial position. See Note 1 to the consolidated financial statements for additional information.

Impairments of Long-Lived Assets and Equity Method Investment. The Company evaluates long-lived assets and equity method investments for impairment when events or changes in circumstances indicate, in management's judgment, that the carrying value of such assets may not be recoverable. With respect to property, plant and equipment and finite lived intangibles, asset recoverability is measured by comparing the carrying value of the asset or asset group with its expected future pre-tax undiscounted cash flows. Any accounting estimate related to impairment of property, plant and equipment, finite-lived intangible assets, goodwill or an investment in an unconsolidated entity may require the Company's management to make assumptions about future cash flows, discount rates, the fair value of investments and whether losses in the value of its investments are other-than-temporary. Management's assumptions about future cash flows require significant judgment because, among other things, actual operating levels have and are expected to differ from estimated levels.

Goodwill is the cost of an acquisition less the fair value of the identifiable net assets of the acquired business. Goodwill is evaluated for impairment at least annually or whenever events or changes in circumstances indicate it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The Company uses a combination of an income and market approach to estimate the fair value of its reporting units.

The Company believes that the accounting estimates related to impairments are "critical accounting estimates" because they require assumptions that are susceptible to change, including estimating fair value which requires considerable judgment. For example, in the case of goodwill, management’s estimate of a reporting unit’s future financial results is sensitive to changes in assumptions, such as changes in the Company's stock price, weighted-average cost of capital, terminal growth rates and industry multiples. The Company believes the estimates and assumptions used in estimating its reporting units’ fair values are reasonable and appropriate; however, different assumptions and estimates could materially affect the calculated fair value and the resulting conclusion on impairment of goodwill, which could materially affect the Company’s results of operations and financial position. The Company performed a sensitivity analysis for the EQM Opco reporting unit (defined and discussed in Note 1), which is the only reporting unit with goodwill as of December 31, 2021, to quantify the effect of certain changes to assumptions used in goodwill assessment. It was determined that it would require more than a 1% increase to the weighted average cost of capital and more than a corresponding 1% decrease to the terminal cash flow growth rate in order for the Company to have recognized an impairment of goodwill as of December 31, 2021.

The Company’s investment in unconsolidated entities also requires considerable judgment to estimate fair value because the Company’s investment is not traded on an active market. When estimating the fair value of its equity method investment, the Company utilizes an income approach under which significant judgments and assumptions, including the discount rate and probability-weighted scenarios, are sensitive to change. For example, an increase of 25 basis points to the discount rate and a 5% decrease to the probability of success would have resulted in an increase to the impairment charge by $227.5 million or 11.8%. Additionally, the Company's investment in unconsolidated entities is susceptible to impairment risk from further

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adverse macroeconomic conditions and/or other adverse factors (such as, in the case of the Company's equity investment in the MVP Joint Venture, permit and litigation matters impacting the MVP project). For example, adverse or delayed developments with respect to such matters or other adverse developments could require that the Company modify assumptions reflected in the probability-weighted scenarios of discounted future net cash flows (including with respect to the probability of success) utilized to estimate the fair value of its equity investment in the MVP Joint Venture, which could result in an incremental other-than-temporary impairment of that investment.

See Notes 1 and 4 to the consolidated financial statements for additional information.

Revenue Recognition. Revenue from the gathering, transmission and storage of natural gas is generally recognized when the service is provided. Revenue from water services is generally recognized when water is delivered. Contracts often contain fixed and variable consideration. Fixed consideration primarily relates to firm reservation payments including MVCs. Variable consideration is generally dependent on volumes and recognized in the period they occur. From time to time, and at a minimum, at each reporting date, management reviews and updates, as necessary, the assumptions utilized to estimate the total consideration for all contracts. For all contracts, the Company allocates the transaction price to each performance obligation based on the estimated relative standalone selling price. When applicable, the excess of consideration received over revenue recognized results in the deferral of those amounts until future periods based on a units of production or straight-line methodology as these methods appropriately match the consumption of services provided to the customer. The units of production methodology requires the use of production estimates that are uncertain and the use of judgment when developing estimates of future production volumes, thus impacting the rate of revenue recognition. Production estimates are monitored as circumstances and events warrant. Certain of the Company's gas gathering and water agreements have MVCs. If a customer under such an agreement fails to meet its MVC for a specified period (thus not exercising all the contractual rights to gathering and water services within the specified period, herein referred to as “breakage”), it is obligated to pay a contractually determined fee based upon the shortfall between the actual volumes and the MVC for the period contained in the contract. When management determines it is probable that the customer will not exercise all or a portion of its remaining rights, the Company recognizes revenue associated with such breakage amount in proportion to the pattern of exercised rights within the respective MVC period.

Revenue related to services provided but not yet billed is estimated each month. These estimates are generally based on contract data, preliminary throughput and allocation measurements. Final amounts for the current month are billed and collected in the following month. See Note 6 to the consolidated financial statements for additional information.

The Company records an allowance for credit losses on a quarterly basis in order to estimate uncollectible receivables. The Company's current expected credit loss (CECL) methodology considers risks of collection based on a customer’s current credit status. The standard requires an entity to assess whether financial assets share similar risk characteristics and, if so, group such assets in a pool. Customer balances are aggregated for evaluation based on their credit risk rating, which takes into account changes in economic factors that impact a customer’s ability to meet its financial obligations. The Company's CECL methodology assigns a reserve, even if remote, to each customer based on credit risk and the reserve is evaluated on a quarterly basis. In order to calculate the appropriate allowance, the Company utilizes an estimated loss rate factor based on a customer's credit rating for receivables and a risk-adjusted reserve based on the receivable aging schedule in order to account for the receivables which may be at a greater risk of collection. Customer credit risk ratings are updated quarterly and management has enabled a risk-responsive approach to changes in customer and economic factors. While the Company has not historically experienced material losses on uncollected receivables, a decline in the market price for natural gas affecting producer activity combined with additional customers on the Company's systems may result in a greater exposure to potential losses than management's current estimates.

The Company believes that the accounting estimates related to revenue recognition are "critical accounting estimates" because estimated relative standalone selling prices and volumes are subject to change based on actual measurements. In addition, the Company believes that the accounting estimates related to the allowance for credit losses are "critical accounting estimates" because the underlying assumptions used for the allowance can change and the actual mix of customers and their ability to pay may vary significantly from management's estimates, which could affect the collectability of customer receivables. These accounting estimates could potentially have a material effect on the Company's results of operations and financial position.

Share-Based Compensation. The Company awards certain share-based compensation in connection with specific programs in the form of performance-based awards that require judgments and estimates to determine their estimated fair value.

Performance-based awards expected to be satisfied in cash are treated as liability awards and remeasured at fair value at the end of each reporting period, recognizing a proportionate amount of the compensation expense for each period over the vesting period of the award. Performance-based awards expected to be satisfied in Company common stock are treated as equity awards and recorded based on an estimated grant date fair value over the vesting period of the award. Determination of the fair

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value of the awards requires judgments and estimates regarding, among other things, the appropriate methodologies to follow in valuing the awards and the related inputs required by those valuation methodologies. The Company obtains a valuation at the grant date for equity awards and at each remeasurement date for liability awards based upon assumptions regarding risk-free rates of return, expected volatilities, the expected term of the award and dividend yield, as applicable. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of valuation. Expected volatilities are based on historical volatility of the Company's common stock and, where applicable, the common stock of the peer group members at the time of valuation. The expected term represents the period of time elapsing during the applicable performance period. The dividend yield is based on the historical dividend yield of the Company's common stock adjusted for any expected changes and, where applicable, the common stock of the peer group members at the time of valuation.

For plans that include a performance condition that affects the number of shares that will ultimately vest, the probability that the performance condition will be achieved is reevaluated at the end of each reporting period and the payout multiplier is applied to the grant date fair value or measurement date fair value to record compensation expense, as applicable. For plans that include a market condition, compensation expense is based on a grant date fair value using a Monte Carlo simulation that remains constant throughout the vesting period for equity plans and a fair value using a Monte Carlo simulation remeasured at each reporting period for liability plans. Each plan subject to a market condition is accounted for separately for each vesting tranche of the award.

The Company believes that the accounting estimates related to share-based compensation are "critical accounting estimates" because they may change from period to period based on changes in assumptions about factors affecting the ultimate payout of awards, including the number of awards to ultimately vest and the market price and volatility of the Company's common stock. See Note 10 to the consolidated financial statements for additional information.

Item 7A.    Quantitative and Qualitative Disclosures About Market Risk

Interest Rate Risk. Changes in interest rates affect the amount of interest the Company earns on cash, cash equivalents and short-term investments and the interest rates EQM and Eureka pay on borrowings under their respective revolving credit facilities. The Amended EQM Credit Facility and the 2021 Eureka Credit Facility provide for variable interest rates and thus expose the Company, through EQM and Eureka, to fluctuations in market interest rates. In addition, EQM's interest rates under the Amended EQM Credit Facility are impacted by changes in EQM's credit ratings (which may be caused by factors outside of EQM's control). Eureka's interest rates under the 2021 Eureka Credit Facility are impacted by changes in Eureka's Consolidated Leverage Ratio (as defined in the 2021 Eureka Credit Facility) which may fluctuate based on Eureka Midstream's liquidity needs or operating results. Accordingly, changes in interest rates may impact the Company's results of operations and liquidity. Further, changes in interest rates may affect the dividend payable on Equitrans Midstream Preferred Shares after March 31, 2024, which could affect the amount of cash the Company has available to make quarterly cash dividends to its shareholders. EQM's senior notes are fixed rate and thus do not expose the Company to fluctuations in market interest rates. Changes in interest rates do affect the fair value of EQM's fixed rate debt. See Note 11 and 12 to the consolidated financial statements for discussions of borrowings and for discussion of fair value measurements, respectively. EQM and Eureka may from time to time hedge the interest on portions of borrowings under the revolving credit facilities, as applicable, in order to manage risks associated with floating interest rates (however, there may be no assurance that such hedges will fully mitigate interest rate risk).

Credit Risk. The Company is exposed to credit risk, which is the risk that it may incur a loss if a counterparty fails to perform under a contract. The Company actively manages its exposure to credit risk associated with customers through credit analysis, credit approval and monitoring procedures. For certain transactions, the Company requests letters of credit, cash collateral, prepayments or guarantees as forms of credit support. Equitrans, L.P.'s FERC tariffs require tariff customers that do not meet specified credit standards to provide three months of credit support; however, the Company is exposed to credit risk beyond this three-month period when its tariffs do not require its customers to provide additional credit support. For some of the Company's long-term contracts associated with system expansions, it has entered into negotiated credit agreements that provide for other credit support if certain credit standards are not met. The Company has historically experienced only minimal credit losses in connection with its receivables.

The Company is exposed to the credit risk of its customers, such as EQT as our largest customer, including as a result of changes in customer credit ratings, liquidity and access to capital markets. At December 31, 2021, EQT's public senior debt had non-investment grade credit ratings. See "Credit Letter Agreement" included in "Item 1. Business" of this Annual Report on Form 10-K for information regarding the Credit Letter Agreement and associated EQT credit rating requirements. In addition, EQT has guaranteed the payment obligations of certain of its subsidiaries, up to a maximum amount of $115 million, $131 million and $30 million related to gathering, transmission and water services, respectively, across all applicable contracts, for the benefit of the subsidiaries of the Company providing such services. See Note 15 to the consolidated financial statements for further discussion of the Company's exposure to credit risk.

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Commodity Prices. The Company's business is dependent on continued natural gas production and the availability and development of reserves in its areas of operation. Prices for natural gas and NGLs, including regional basis differentials, have previously adversely affected, and may in the future adversely affect, the timing of development of additional reserves and production that is accessible by the Company’s pipeline and storage assets, which also negatively affects the Company’s water services business, and the creditworthiness of the Company’s customers.

Although natural gas prices have increased from 2020 lows as of the filing date of this Annual Report on Form 10-K, higher natural gas prices have not caused the Company's largest customers to increase their production forecasts and, even if natural gas prices remain elevated, the Company's customers may announce in the future lower, flat or modest increases to production forecasts based on various factors, which could include regional takeaway capacity limitations, access to capital, investor expectations regarding free cash flow, a desire to reduce or refinance leverage or other factors. Additionally, prices may decline based on numerous factors, including levels of associated gas. See also “Decreases in production of natural gas in our areas of operation, whether as a result of producer corporate capital allocation strategies, lower regional natural gas prices, regional takeaway constraints, and/or other factors, have adversely affected, and in the future could adversely affect, our business and operating results and reduce our cash available to pay cash dividends to our shareholders.” and "The lack of diversification of our assets and geographic locations could adversely affect us." under "Item 1A. Risk Factors."

Lower natural gas prices, particularly in the Appalachian region, have in the past caused, and may in the future cause, certain producers, including customers of the Company, to determine to reduce or hold generally steady their rig count (and thereby delay or not increase production), delay turning wells in line, temporarily shut in portions of their production or otherwise take actions to slow production growth and/or reduce production, which when effected by the Company's producer customers reduces the demand for, and usage of, the Company’s services. For instance, temporary production curtailments effected in 2020 by EQT and certain other Company customers resulted in a decrease in the Company's volumetric-based fee revenues for portions of 2020. An extended period of low natural gas prices and/or instability in natural gas prices in future periods, especially in the Appalachian region, or other factors, could cause EQT or other producers to take similar actions in the future, which could have a significant negative effect on the demand for the Company's services and therefore its results of operations. Additionally, lower natural gas prices (including regionally), corporate capital allocation strategies or regional takeaway constraints, could cause producers to determine in the future that drilling activities in areas outside of the Company's current areas of operation are strategically more attractive to them.

Many of the Company’s customers, including EQT, have entered into long-term firm reservation gathering, transmission and water contracts or contracts with MVCs on the Company's systems and approximately 64% of the Company's operating revenues for the year ended December 31, 2021 was generated by firm reservation fees. As a result, the Company believes that the effect of temporary declines in volumes of gas gathered, transported or stored on its systems may be mitigated because firm reservation fee revenues are paid regardless of volumes supplied to the system by customers (although significant declines in gas production in the Company's areas of operations would adversely affect the Company's results of operations, financial condition and liquidity as approximately 36% of the Company’s operating revenues for the year ended December 31, 2021 was generated by volumetric-based fee revenues). See "Our exposure to direct commodity price risk may increase in the future." under "Item 1A. Risk Factors."

Price declines and sustained periods of low natural gas and NGL prices could have an adverse effect on the creditworthiness of the Company's customers and related ability to pay firm reservation fees under long-term contracts and/or affect, as discussed above, activity levels and, accordingly, volumetric-based fees, which could affect the Company’s results of operations, liquidity or financial position. For example, each of S&P, Moody's and Fitch took negative ratings actions on EQT during 2020, citing, among other things, lower natural gas price assumptions and financing needs (although all three ratings agencies later took positive action on EQT citing, among other things, subsequent debt reduction and improvements in natural gas fundamentals). Credit risk and related management is further discussed above under “Credit Risk” in Part II, “Item 7A. Quantitative and Qualitative Disclosures About Market Risk” of this Annual Report on Form 10-K.

Unless the Company is successful in attracting and retaining new customers, the Company's ability to maintain or increase the capacity subscribed and volumes transported, gathered or provided on its systems will be dependent on receiving consistent or increasing commitments and production from its existing customers, which may be impacted by commodity prices, including regional commodity prices and/or other factors, including corporate capital allocation strategies. While EQT has dedicated a substantial portion of its core acreage to the Company and has entered into long-term firm gathering and transmission contracts and contracts with MVCs on certain of the Company's systems, EQT may determine in the future that drilling or continuing to produce gas from existing wells in the Company's areas of operations is not economical above the amount to fulfill its required MVCs or otherwise strategically determine to curtail volumes on the Company's systems. Other than with respect to its MVCs and other firm commitments under existing contracts, EQT is under no contractual obligation to continue to develop its acreage dedicated to the Company. See also Note 6 to the consolidated financial statements for a discussion of the EQT Global GGA and the 2021 Water Services Agreement.

The fair value of the Company’s derivative instruments is, in part, determined by estimates of the NYMEX Henry Hub natural gas forward price curve. A hypothetical 10% increase in NYMEX Henry Hub natural gas futures prices would increase the

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valuation of the Company’s derivative instruments by approximately $7.0 million, while a hypothetical 10% decrease in NYMEX Henry Hub natural gas futures prices would decrease the valuation of the Company’s derivative instruments by approximately $7.7 million. See Notes 1 and 6 to the consolidated financial statements for a discussion of the Henry Hub cash bonus payment provision.

For further discussion of commodity prices and related risks, see "Our exposure to direct commodity price risk may increase in the future," "Decreases in production of natural gas in our areas of operation, whether as a result of producer corporate capital allocation strategies, lower regional natural gas prices, regional takeaway constraints, and/or other factors, have adversely affected, and in the future could adversely affect, our business and operating results and reduce our cash available to pay cash dividends to our shareholders," and "The lack of diversification of our assets and geographic locations could adversely affect us." each under "Item 1A. Risk Factors".

Other Market Risks. The Amended EQM Credit Facility and the 2021 Eureka Credit Facility are underwritten by syndicates of 21 and 16 financial institutions, respectively, each of which is obligated to fund its pro rata portion of any borrowings by EQM or Eureka, as applicable. In each case, no one lender of the financial institutions in the syndicate holds more than 10% of such facility. EQM's and Eureka's respective large syndicate groups and relatively low percentage of participation by each lender is expected to limit the Company's and Eureka's respective exposure to disruption or consolidation in the banking industry.

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Item 8.        Financial Statements and Supplementary Data

	Page No.
Reports of Independent Registered Public Accounting Firm (PCAOB ID: 42)	86
Statements of Consolidated Comprehensive Income for the Years Ended December 31, 2021, 2020 and 2019	91
Statements of Consolidated Cash Flows for the Years Ended December 31, 2021, 2020 and 2019	92
Consolidated Balance Sheets as of December 31, 2021 and 2020	93
Statements of Consolidated Shareholders' Equity and Mezzanine Equity for the Years Ended December 31, 2021, 2020 and 2019	94
Notes to Consolidated Financial Statements	95

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Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of Equitrans Midstream Corporation

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Equitrans Midstream Corporation (the Company) as of December 31, 2021 and 2020, the related statements of consolidated comprehensive income, cash flows and equity for each of the three years in the period ended December 31, 2021, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2021 and 2020, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2021, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 23, 2022 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matters communicated below are matters arising from the current period audit of the financial statements that were communicated or required to be communicated to the audit committee and that: (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

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	Valuation of EQM OpCo Reporting Unit Goodwill
Description of the Matter	At December 31, 2021, the Company had goodwill of approximately $486.7 million related to the EQM OpCo reporting unit. As discussed in Notes 1 and 4 to the consolidated financial statements, goodwill is evaluated for impairment at least annually and whenever events or changes in circumstance indicate that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then a quantitative assessment is not required. However, if the Company concludes otherwise, a quantitative impairment analysis is performed. If the Company chooses not to perform a qualitative assessment, or if it chooses to perform a qualitative assessment but is unable to qualitatively conclude that no impairment has occurred, then the Company will perform a quantitative assessment. In the case of a quantitative impairment test, the Company estimates the fair value of the reporting unit with which the goodwill is associated and compares it to the carrying value. If the estimated fair value of a reporting unit is less than its carrying value, an impairment charge is recognized for the excess of the reporting unit's carrying value over its fair value. Auditing management’s quantitative goodwill impairment test for the EQM OpCo reporting unit was complex due to the significant estimation required to determine the fair value of that reporting unit. In particular, the fair value estimates of that reporting unit were sensitive to significant assumptions, including assumptions regarding future throughput volumes and operating costs, and discount rates, among others. These assumptions could be affected by factors such as unexpected future production curtailments by the Company’s customers that have contracts with volumetric-based fees or future market or economic conditions and industry and company-specific qualitative factors.
How We Addressed the Matter in Our Audit	We obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the Company’s goodwill impairment review process, including controls over management’s review of the significant assumptions described above. To test the estimated fair value of the Company’s EQM OpCo reporting unit for which a quantitative impairment test was performed, we performed audit procedures that included, among others, evaluating methodologies used and testing the significant assumptions discussed above and testing the underlying data used by the Company in its analyses for completeness and accuracy. We compared the significant assumptions used by management to current industry and economic trends and evaluated whether changes in those trends would affect the significant assumptions. We assessed the historical accuracy of management’s estimates and performed sensitivity analyses of significant assumptions to evaluate the changes in the fair value of the reporting unit that would result from changes in the assumptions. We involved our valuation specialists to assist in reviewing the valuation methodology and testing the discount rate assumption. Our procedures also included evaluating the sufficiency of the Company’s disclosures with respect to the valuation of EQM OpCo reporting unit goodwill described in Note 4 to the consolidated financial statements.

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Valuation of Equity Method Investment in Mountain Valley Pipeline, LLC (MVP Joint Venture)

Description of the Matter

At December 31, 2021, the Company has an investment in the MVP Joint Venture of approximately $1.2 billion. As discussed in Notes 1 and 9 to the consolidated financial statements, the Company accounts for its interests in the MVP Joint Venture under the equity method because it has the ability to exercise significant influence, but not control, over the MVP Joint Venture's operating and financial policies. The Company reviews the carrying value of its investments in unconsolidated entities for impairment whenever events or changes in circumstances indicate that the fair value may have declined in value. When there is evidence of loss in value that is other-than-temporary, the Company compares the investment's carrying value to its estimated fair value to determine whether impairment has occurred. If the carrying value exceeds the estimated fair value, the Company estimates and recognizes an impairment loss equal to the difference between the investment's carrying value and fair value. During the year ended December 31, 2021, the Company evaluated its investment in the MVP Joint Venture for impairment. As described in Note 4 to the consolidated financial statements, the Company identified as an indicator of an other-than-temporary decline in value the various uncertain legal outcomes and the potential impacts that certain unfavorable outcomes could have on the then targeted full in-service date for the MVP project and consequent timing for certain projects related thereto and total targeted MVP project costs. The Company also considered unfavorable decisions by the U.S. Court of Appeals for the Fourth Circuit as supplemental evidence in evaluating its equity method investment in the MVP Joint Venture as of December 31, 2021, to determine if the investment’s carrying value exceeded the fair value and, if so, whether that the decline in value was other-than-temporary. The Company used probability-weighted scenarios of discounted future cash flows to estimate the fair value of the investment. The Company considered scenarios under which ongoing or new legal and regulatory matters further delay the completion and increase the total costs of the project; all required legal and regulatory approvals and authorizations and certain compression expansion opportunities are realized; and the MVP project is canceled. As a result of the assessment, the Company recognized a pre-tax impairment charge of $1.9 billion that reduced the carrying value of its equity investment in the MVP Joint Venture to approximately $1.2 billion as of December 31, 2021. The use of probability-weighted, discounted cash flows requires management to make significant estimates regarding the likelihood of various scenarios utilized to determine the fair value estimate. Changes in the probability-weighted assumptions could have a significant impact on the fair value estimate, which is used to determine the amount of any impairment. Auditing management’s evaluation of impairment of the equity investment in the MVP Joint Venture was complex due to the significant judgment required to determine the fair value of the investment. In particular, the fair value estimates of the investment in the MVP Joint Venture were sensitive to significant assumptions, including assumptions regarding the probability-weighted, discounted cash flows. These assumptions could be affected by factors such as adverse macroeconomic conditions or other adverse factors such as permit and litigation matters impacting the MVP Joint Venture. The audit procedures to evaluate the reasonableness of management’s estimates and assumptions related to the likelihood of various probability-weighted scenarios required a high degree of auditor judgement and an increased extent of effort.

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How We Addressed the Matter in Our Audit We obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the Company’s equity method investment impairment evaluation process, including controls over management’s review of the significant assumptions described above.
To test the Company’s impairment evaluation related to its investment in the MVP Joint Venture, we performed audit procedures that included evaluating the methodologies used and testing significant assumptions and underlying data used by the Company in its analyses for completeness and accuracy. We involved our valuation specialists to assist in reviewing the valuation methodology and testing the discount rate assumption.
Our audit procedures related to the probability-weighted forecasts of discounted future cash flows included, among others, procedures to evaluate the reasonableness of the probabilities assigned by management to various outcomes. We also performed procedures to assess management’s consideration of potential changes in legal or regulatory trends and how such developments could impact significant assumptions that influence the in-service dates or viability of the project. We performed procedures to evaluate the reasonableness of key assumptions based upon management’s plans to resolve outstanding permitting issues and performed reviews to identify any potential contrary evidence through reading information included in the Company’s press releases, regulatory filings, analyst and industry reports, internal communications to management and the Board of Directors, among others. Our procedures also included evaluating the sufficiency of the Company’s disclosures with respect to the valuation of the investment in the MVP Joint Venture described in Note 4 to the consolidated financial statements.

/s/ Ernst & Young LLP

We have served as the Company's auditor since 2018.

Pittsburgh, Pennsylvania

February 23, 2022

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Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of Equitrans Midstream Corporation

Opinion on Internal Control over Financial Reporting

We have audited Equitrans Midstream Corporation's internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, Equitrans Midstream Corporation (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2021, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2021 and 2020, the related statements of consolidated comprehensive income, cash flows and equity for each of the three years in the period ended December 31, 2021 and the related notes and our report dated February 23, 2022 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Pittsburgh, Pennsylvania

February 23, 2022

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EQUITRANS MIDSTREAM CORPORATION

 STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME

YEARS ENDED DECEMBER 31,

	2021		2020		2019
	(Thousands, except per share amounts)
Operating revenues	$	1,317,037	$	1,510,825	$	1,630,242
Operating expenses:
Operating and maintenance	153,426		154,109		165,367
Selling, general and administrative	138,647		129,969		112,915
Separation and other transaction costs	—		23,797		26,080
Depreciation	270,404		259,613		227,364
Amortization of intangible assets	64,819		63,195		53,258
Impairments of long-lived assets	56,178		55,581		969,258
Total operating expenses	683,474		686,264		1,554,242
Operating income	633,563		824,561		76,000
Equity income (a)	17,579		233,833		163,279
Impairment of equity method investment	(1,926,402)		—		—
Other (expense) income, net	(16,104)		17,225		2,661
Loss on extinguishment of debt	(41,025)		(24,864)		—
Net interest expense	(378,650)		(307,380)		(256,195)
(Loss) income before income taxes	(1,711,039)		743,375		(14,255)
Income tax (benefit) expense	(345,091)		105,331		50,704
Net (loss) income	(1,365,948)		638,044		(64,959)
Net income attributable to noncontrolling interests	14,530		214,912		138,784
Net (loss) income attributable to Equitrans Midstream	(1,380,478)		423,132		(203,743)
Preferred dividends	58,512		58,760		—
Net (loss) income attributable to Equitrans Midstream common shareholders	$	(1,438,990)	$	364,372	$	(203,743)
(Loss) earnings per share of common stock attributable to Equitrans Midstream common shareholders - basic	$	(3.32)	$	1.06	$	(0.80)
(Loss) earnings per share of common stock attributable to Equitrans Midstream common shareholders - diluted	$	(3.32)	$	1.06	$	(0.80)
Weighted average common shares outstanding - basic	433,008		343,935		254,884
Weighted average common shares outstanding - diluted	433,008		343,975		254,884
Net (loss) income	$	(1,365,948)	$	638,044	$	(64,959)
Other comprehensive loss, net of tax:
Pension and other post-retirement benefits liability adjustment, net of tax expense of $62, $70 and $70	(175)		(203)		(517)
Other comprehensive loss	(175)		(203)		(517)
Comprehensive (loss) income	(1,366,123)		637,841		(65,476)
Less: Comprehensive income attributable to noncontrolling interests	14,530		214,912		138,784
Less: Comprehensive income attributable to preferred dividends	58,512		58,760		—
Comprehensive (loss) income attributable to Equitrans Midstream common shareholders	$	(1,439,165)	$	364,169	$	(204,260)
Dividends declared per common share	$	0.60	$	0.60	$	1.80

(a)Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note 9.

The accompanying notes are an integral part of these consolidated financial statements.

91

EQUITRANS MIDSTREAM CORPORATION

STATEMENTS OF CONSOLIDATED CASH FLOWS

YEARS ENDED DECEMBER 31,

	2021		2020		2019
	(Thousands)
Cash flows from operating activities:
Net (loss) income	$	(1,365,948)	$	638,044	$	(64,959)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation	270,404		259,613		227,364
Amortization of intangible assets	64,819		63,195		53,258
Impairments of long-lived assets and equity method investments	1,982,580		55,581		969,258
Deferred income taxes	(349,944)		102,718		50,704
Equity income	(17,579)		(233,833)		(163,279)
Other expense (income), net	16,043		(17,278)		(5,716)
Loss on extinguishment of debt	41,025		24,864		—
Non-cash long-term compensation expense	14,921		12,301		2,786
Changes in other assets and liabilities:
Accounts receivable	64,172		(37,810)		17,523
Accounts payable	(2,709)		(7,922)		(90,301)
Deferred revenue	423,666		225,746		—
Other assets and other liabilities	27,318		55,667		(20,151)
Net cash provided by operating activities	1,168,768		1,140,886		976,487
Cash flows from investing activities:
Capital expenditures	(290,521)		(462,031)		(967,369)
Capital contributions to the MVP Joint Venture	(287,665)		(272,801)		(774,593)
Bolt-on Acquisition (defined in Note 3), net of cash acquired	—		—		(837,231)
Principal payments received on the Preferred Interest (defined in Note 1)	5,217		5,003		4,661
Net cash used in investing activities	(572,969)		(729,829)		(2,574,532)
Cash flows from financing activities:
Proceeds from revolving credit facility borrowings	467,500		1,965,000		2,484,000
Payments on revolving credit facility borrowings	(750,000)		(2,080,000)		(2,495,500)
Proceeds from the issuance of long-term debt	1,900,000		1,600,000		1,400,000
Debt discounts, debt issuance costs and credit facility origination fees	(29,904)		(26,720)		(2,870)
Payments for retirement of long-term debt	(1,936,250)		(594,000)		(34,325)
Redemption of EQM Series A Preferred Units (defined in Note 1)	—		(617,338)		—
Proceeds from issuance of EQM Series A Preferred Units, net of offering costs	—		—		1,158,313
Distributions paid to noncontrolling interests	(2,500)		(128,770)		(382,360)
Distributions paid to holders of EQM Series A Preferred Units	—		(61,931)		(48,480)
Dividends paid to holders of Equitrans Midstream Preferred Shares	(58,512)		(16,879)		—
Dividends paid to common shareholders	(259,495)		(278,395)		(448,128)
Cash Shares and Cash Amount (defined in Note 6)	—		(52,323)		—
Purchases of EQGP common units	—		—		(238,455)
Net cash (used in) provided by financing activities	(669,161)		(291,356)		1,392,195
Net change in cash and cash equivalents	(73,362)		119,701		(205,850)
Cash and cash equivalents at beginning of year	208,023		88,322		294,172
Cash and cash equivalents at end of year	$	134,661	$	208,023	$	88,322
Cash paid during the period for:
Interest, net of amount capitalized	$	343,351	$	249,302	$	257,065
Income taxes	3,500		3,709		—
Non-cash activity during the period for:
Issuance of Equitrans Midstream common stock pursuant to the EQM Merger (defined in Note 1), net of tax	$	—	$	2,736,229	$	—
Issuance of Equitrans Midstream Preferred Shares pursuant to the Restructuring Agreement	—		667,214		—
Contract liability	—		121,483		—
Separation-related adjustments	—		—		93,666

The accompanying notes are an integral part of these consolidated financial statements.

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EQUITRANS MIDSTREAM CORPORATION

CONSOLIDATED BALANCE SHEETS

DECEMBER 31,

	2021		2020
	(Thousands)
ASSETS
Current assets:
Cash and cash equivalents	$	134,661	$	208,023
Accounts receivable (net of allowance for credit losses of $2,696 and $4,699 as of December 31, 2021 and 2020, respectively)	252,301		290,446
Other current assets	59,867		63,268
Total current assets	446,829		561,737
Property, plant and equipment	9,004,602		8,835,652
Less: accumulated depreciation	(1,217,099)		(1,007,756)
Net property, plant and equipment	7,787,503		7,827,896
Investments in unconsolidated entity	1,239,039		2,796,316
Goodwill	486,698		486,698
Net intangible assets	651,771		716,590
Other assets	308,924		336,615
Total assets	$	10,920,764	$	12,725,852
LIABILITIES, MEZZANINE EQUITY AND SHAREHOLDERS' EQUITY
Current liabilities:
Current portion of revolving credit facility borrowings	$	—	$	302,500
Accounts payable	59,627		72,098
Capital contributions payable to the MVP Joint Venture	72,188		10,723
Accrued interest	151,909		126,191
Accrued liabilities	83,852		83,366
Total current liabilities	367,576		594,878
Revolving credit facility borrowings	505,000		485,000
Long-term debt	6,434,945		6,443,312
Contract liability	821,342		398,750
Deferred income taxes	—		345,896
Regulatory and other long-term liabilities	99,333		94,902
Total liabilities	8,228,196		8,362,738
Mezzanine equity:
Equitrans Midstream Preferred Shares, 30,018 shares issued and outstanding as of December 31, 2021 and 2020	681,842		681,842
Shareholders' equity:
Common stock, no par value, 432,522 and 432,470 shares issued and outstanding as of December 31, 2021 and 2020, respectively	3,957,756		3,941,295
Retained deficit	(2,428,171)		(728,959)
Accumulated other comprehensive loss	(2,054)		(2,229)
Total common shareholders' equity	1,527,531		3,210,107
Noncontrolling interests	483,195		471,165
Total shareholders' equity	2,010,726		3,681,272
Total liabilities, mezzanine equity and shareholders' equity	$	10,920,764	$	12,725,852

The accompanying notes are an integral part of these consolidated financial statements.

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EQUITRANS MIDSTREAM CORPORATION

STATEMENTS OF CONSOLIDATED SHAREHOLDERS' EQUITY AND MEZZANINE EQUITY

												Mezzanine
	Common Stock											Equity
						Accumulated Other						Equitrans
				Retained								Midstream
	Shares	No		Earnings		Comprehensive		Noncontrolling		Total		Preferred
	Outstanding	Par Value		(Deficit)		Loss		Interests		Equity		Shares
	(Thousands, except per unit and share amounts)
Balance at January 1, 2019	254,271	$	425,370	$	33,932	$	(1,509)	$	4,801,840	$	5,259,633	$	—
Other comprehensive income (net of tax):
Net (loss) income	—	—		(203,743)		—		138,784		(64,959)		—
Pension and other post-retirement benefits liability adjustment, net of tax expense of $70	—	—		316		(517)		—		(201)		—
Dividends on common shares ($1.76 per share)	—	—		(448,567)		—		—		(448,567)		—
Share-based compensation plans, net	474	2,531		—		—		255		2,786		—
Separation-related adjustments	—	(93,666)		—		—		—		(93,666)		—
Distributions paid to noncontrolling interest unitholders ($4.595 per common unit for EQM)	—	—		—		—		(382,360)		(382,360)		—
Distributions paid to holders of EQM Series A Preferred Units ($1.9703 per EQM Series A Preferred Unit)	—	—		—		—		(48,480)		(48,480)		—
Issuance of EQM Series A Preferred Units, net of offering costs	—	—		—		—		1,158,313		1,158,313		—
Bolt-on Acquisition (as defined in Note 3)	—	—		—		—		478,460		478,460		—
Purchase of EQGP common units	—	(38,648)		—		—		(199,807)		(238,455)		—
Net changes in ownership of consolidated entities	—	997,217		—		—		(1,337,641)		(340,424)
Balance at December 31, 2019	254,745	$	1,292,804	$	(618,062)	$	(2,026)	$	4,609,364	$	5,282,080	$	—
Other comprehensive income (net of tax):
Net income	—	—		391,625		—		214,912		606,537		31,507
Pension and other post-retirement benefits liability adjustment, net of tax expense of $70	—	—		—		(203)		—		(203)		—
Dividends on common shares ($0.90 per share)	(178)	—		(280,559)		—		—		(280,559)		—
Share-based compensation plans, net	66	12,786		—		—		285		13,071		—
Distributions paid to noncontrolling interest unitholders ($1.5475 per common unit for EQM)	—	—		—		—		(128,770)		(128,770)		—
Distributions paid to holders of EQM Series A Preferred Units ($2.0728 per EQM Series A Preferred Unit)	—	—		—		—		(51,002)		(51,002)		—
Dividends paid to holders of Equitrans Midstream Preferred Shares ($0.5623 per share)	—	—		—		—		—		—		(16,879)
Partial period distributions on EQM Series A Preferred Units converted in the EQM Merger (as defined in Note 1)	—	—		—		—		(10,929)		(10,929)		—
Redemption of EQM Series A Preferred Units	—	—		(27,253)		—		(590,085)		(617,338)		—
Restructuring Agreement (as defined in Note 1)	—	(100,524)		—		—		(579,157)		(679,681)		667,214
EQM Merger	203,137	2,736,229		—		—		(2,993,453)		(257,224)		—
Share Purchase Agreements (as defined in Note 6)	(25,300)	—		(190,992)		—		—		(190,992)		—
Adoption of Topic 326 (as defined in Note 1)	—	—		(3,718)		—		—		(3,718)		—
Balance at December 31, 2020	432,470	$	3,941,295	$	(728,959)	$	(2,229)	$	471,165	$	3,681,272	$	681,842
Other comprehensive income (net of tax):
Net (loss) income	—	—		(1,438,990)		—		14,530		(1,424,460)		58,512
Pension and other post-retirement benefits liability adjustment, net of tax expense of $62	—	—		—		175		—		175		—
Dividends on common shares ($0.60 per share)	—	—		(260,222)		—		—		(260,222)		—
Share-based compensation plans, net	52	16,461		—		—		—		16,461		—
Distributions paid to noncontrolling interest in Eureka Midstream Holdings, LLC	—	—		—		—		(2,500)		(2,500)		—
Dividends paid to holders of Equitrans Midstream Preferred Shares ($1.9492 per share)	—	—		—		—		—		—		(58,512)
Balance at December 31, 2021	432,522	$	3,957,756	$	(2,428,171)	$	(2,054)	$	483,195	$	2,010,726	$	681,842

The accompanying notes are an integral part of these consolidated financial statements.

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EQUITRANS MIDSTREAM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

DECEMBER 31, 2021

1.    Summary of Operations and Significant Accounting Policies

Organization

On November 12, 2018, Equitrans Midstream Corporation (together with its consolidated subsidiaries as applicable, the Company or Equitrans Midstream), EQT Corporation (EQT) and, for certain limited purposes, EQT Production Company, a wholly owned subsidiary of EQT, entered into a separation and distribution agreement (the Separation and Distribution Agreement), pursuant to which, among other things, EQT effected the separation of its midstream business, which was composed of the assets and liabilities of the separately-operated natural gas gathering, transmission and storage and water services operations of EQT (the Midstream Business), from EQT's upstream business, which was composed of the natural gas, oil and natural gas liquids development, production and sales and commercial operations of EQT (the Separation), and distributed 80.1% of the then-outstanding shares of common stock, no par value, of Equitrans Midstream (Equitrans Midstream common stock) to EQT shareholders of record as of the close of business on November 1, 2018 (the Distribution). As part of the Separation, EQT retained the remaining 19.9% of the then-outstanding shares in Equitrans Midstream.

Immediately following the Separation, the Company held investments in the entities then-conducting the Midstream Business, including limited and general partner interests in EQGP Holdings, LP (EQGP), which, as of the date of Separation, owned limited partner interests, the entire general partner interest and all of the incentive distribution rights (IDRs) in EQM Midstream Partners, LP (EQM). Following the closing of the EQGP Buyout (as defined and discussed in Note 2), EQGP became an indirect, wholly owned subsidiary of the Company on January 10, 2019.

The Company owns, operates, acquires and develops midstream assets in the Appalachian Basin. As of December 31, 2021, EQGP Services, LLC was EQM's general partner (the EQM General Partner) and was an indirect, wholly owned subsidiary of Equitrans Midstream.

EQM Merger. On June 17, 2020, pursuant to that certain Agreement and Plan of Merger, dated as of February 26, 2020 (the EQM Merger Agreement), by and among the Company, EQM LP Corporation, a wholly owned subsidiary of the Company (EQM LP), LS Merger Sub, LLC, a wholly owned subsidiary of EQM LP (Merger Sub), EQM and the EQM General Partner, Merger Sub merged with and into EQM (the EQM Merger), with EQM continuing and surviving as an indirect, wholly owned subsidiary of the Company. Upon consummation of the EQM Merger, the Company acquired all of the outstanding EQM common units that the Company and its subsidiaries did not already own. Following the closing of the EQM Merger, EQM was no longer a publicly traded entity. See Note 2 for further information on the EQM Merger.

Preferred Restructuring Agreement. On February 26, 2020, Equitrans Midstream and EQM entered into a Preferred Restructuring Agreement (the Restructuring Agreement) with all of the holders of the Series A Perpetual Convertible Preferred Units representing limited partner interests in EQM (such units, EQM Series A Preferred Units and, such investors, collectively, the Investors), pursuant to which, at the effective time of the EQM Merger (the Effective Time): (i) EQM redeemed $600 million aggregate principal amount of the Investors' EQM Series A Preferred Units issued and outstanding immediately prior to the Restructuring Closing (as defined below), which occurred substantially concurrent with the closing of the EQM Merger, for cash at 101% of the EQM Series A Preferred Unit purchase price of $48.77 per such unit (the EQM Series A Preferred Unit Purchase Price) plus any accrued and unpaid distribution amounts and partial period distribution amounts, and (ii) immediately following such redemption, each remaining issued and outstanding EQM Series A Preferred Unit was exchanged for 2.44 shares of a newly authorized and created series of preferred stock, without par value, of Equitrans Midstream, convertible into Equitrans Midstream common stock (the Equitrans Midstream Preferred Shares) on a one for one basis, in each case, in connection with the occurrence of the “Series A Change of Control” (as defined in the Fourth Amended and Restated Agreement of Limited Partnership of EQM (as amended, the Former EQM Partnership Agreement)) that occurred upon the closing of the EQM Merger (collectively, the Restructuring and, the closing of the Restructuring, the Restructuring Closing). See Note 2 for further information on the Restructuring Agreement.

Nature of Business

The Company provides midstream services to its customers in Pennsylvania, West Virginia and Ohio through its three primary assets: the gathering system, which includes predominantly dry gas gathering systems of high-pressure gathering lines; the transmission system, which includes FERC-regulated interstate pipelines and storage systems; and the water network, which primarily consists of water pipelines and other facilities that support well completion activities and produced water handling activities.

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As of December 31, 2021, the gathering system, inclusive of Eureka Midstream's gathering system, included approximately 1,170 miles of high-pressure gathering lines with total contracted firm reservation capacity of approximately 7.0 billion cubic feet (Bcf) per day, which included contracted firm reservation capacity of approximately 1.8 Bcf per day associated with EQM's high-pressure header pipelines, 133 compressor units with compression of approximately 491,000 horsepower and multiple interconnect points with the Company's transmission and storage system and to other interstate pipelines.

As of December 31, 2021, the transmission and storage system included approximately 950 miles of FERC-regulated, interstate pipelines that have interconnect points to seven interstate pipelines and multiple local distribution companies (LDCs). The transmission and storage system is supported by 43 compressor units, with total throughput capacity of approximately 4.4 Bcf per day and compression of approximately 136,000 horsepower, and 18 associated natural gas storage reservoirs, which have a peak withdrawal capacity of approximately 850 million cubic feet (MMcf) per day and a working gas capacity of approximately 43 Bcf, in each case as of December 31, 2021.

As of December 31, 2021, the Company's fresh water systems included approximately 200 miles of pipelines that deliver fresh and produced water from local municipalities' water authorities, the Monongahela River, the Ohio River, local reservoirs and several regional waterways. The fresh water delivery services systems consist of permanent, buried pipelines, surface pipelines, 23 fresh water impoundment facilities, as well as pumping stations, which support water transportation throughout the systems, and take point facilities and measurement facilities, which support well completion activities. As of December 31, 2021, the Company's mixed water system, which the Company began to construct in 2021, included approximately eight miles of buried pipeline.

Significant Accounting Policies

Principles of Consolidation. The consolidated financial statements include the accounts of all entities in which the Company holds a controlling financial interest. For consolidated subsidiaries in which the Company’s ownership is less than 100%, the Company records noncontrolling interest related to the third-party ownership interests in those entities. Investments over which the Company can exert significant influence, but not control, over operating and financial policies are recorded under the equity method of accounting. Intercompany transactions have been eliminated for purposes of preparing these consolidated financial statements. References in these financial statements to Equitrans Midstream or the Company refer collectively to Equitrans Midstream Corporation and, as applicable, its consolidated subsidiaries for all periods presented, unless otherwise indicated.

Segments. Operating segments are revenue-producing components of the enterprise for which separate financial information is produced internally and is subject to evaluation by the Company's chief operating decision maker in deciding how to allocate resources. The Company reports its operations in three segments that reflect its three lines of business of Gathering, Transmission and Water. The operating segments are evaluated based on their contribution to the Company's operating income and equity income. Transmission also includes the Company's investment in the MVP Joint Venture, which is accounted for as an equity investment as described in Note 9; as a result, Transmission's portion of the MVP Joint Venture's operating results is reflected in equity income and not in Transmission's operating income. All of the Company's operating revenues, income and assets are generated or located in the United States. See Note 5 for financial information by segment.

Reclassification: Certain previously reported amounts have been reclassified to conform to current year presentation.

Use of Estimates. The preparation of financial statements in conformity with U.S. Generally Accepted Accounting Principles (GAAP) requires management to make estimates and assumptions that affect amounts reported in these financial statements. Actual results could differ from those estimates.

Cash Equivalents. The Company classifies highly-liquid investments with original maturities of three months or less as cash equivalents. Interest earned on cash equivalents is recorded as a reduction to net interest expense on the statements of consolidated comprehensive income.

Accounts Receivables. Trade and other receivables are stated at their historical carrying amount. Judgment is required to assess the ultimate realization of accounts receivable, including assessing the probability of collection and the creditworthiness of customers. The Company evaluates the allowance for credit losses on a quarterly basis in order to estimate uncollectible receivables.

Derivative Instruments. Derivative instruments are recorded on the Company’s consolidated balance sheets as either an asset or liability measured at fair value. See Note 12.

Fair Value of Financial Instruments. Fair value represents the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the reporting date. The Company’s assets and liabilities that are measured at fair value at each reporting date are classified according to a hierarchy that prioritizes inputs and assumptions

96

underlying the valuation techniques. This fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs and consists of three broad levels:

•Level 1: Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets as of the reporting date.

•Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data. These are inputs other than quoted prices in active markets included in Level 1 that are either directly or indirectly observable as of the reporting date.

•Level 3: Unobservable inputs that are not corroborated by market data and may be used with internally developed methodologies that result in management’s best estimate of fair value.

The Company prioritizes valuation techniques that maximize the use of observable inputs. Assets and liabilities are classified in their entirety based on the lowest priority level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the placement of assets and liabilities within the levels of the fair value hierarchy. Reclassifications of fair value between Level 1, Level 2 and Level 3 of the fair value hierarchy, if applicable, are made at the end of each reporting period. See Note 12 for information regarding the fair value of financial instruments.

Property, Plant and Equipment. The Company's property, plant and equipment are stated at depreciated cost. Maintenance projects that do not increase the overall life of the related assets are expensed as incurred. Expenditures that extend the useful life of the asset are capitalized. The Company capitalized internal labor costs of $50.8 million, $44.9 million and $47.6 million in the years ended December 31, 2021, 2020 and 2019, respectively. The Company capitalized interest, including the debt component of Allowance for Funds Used During Construction (AFUDC), of $4.9 million, $18.6 million and $29.5 million in the years ended December 31, 2021, 2020 and 2019, respectively.

The following table summarizes the Company's property, plant and equipment.

	December 31,
	2021		2020
	(Thousands)
Gathering assets	$	6,911,268	$	6,691,954
Accumulated depreciation	(727,735)		(543,568)
Net gathering assets	6,183,533		6,148,386
Transmission and storage assets	1,901,756		1,877,753
Accumulated depreciation	(424,918)		(370,764)
Net transmission and storage assets	1,476,838		1,506,989
Water services assets	176,245		251,885
Accumulated depreciation	(60,379)		(90,841)
Net water services assets	115,866		161,044
Net other property, plant and equipment	11,266		11,477
Net property, plant and equipment	$	7,787,503	$	7,827,896

Net other property, plant and equipment includes capitalized qualified implementation costs incurred in a hosting arrangement that is a service contract of $10.0 million and $8.8 million, respectively, as of December 31, 2021 and 2020. The Company finalized the implementation of certain portions of its enterprise resource planning system throughout 2021 and 2020 and amortized approximately $0.9 million and $0.5 million of implementation costs in the years ended December 31, 2021 and 2020, respectively.

Depreciation is recorded using composite rates on a straight-line basis over the estimated useful life of the asset. The average depreciation rates for the years ended December 31, 2021, 2020 and 2019 were 2.6%, 2.5% and 2.7%, respectively. The Company estimates that gathering and transmission pipelines have useful lives of 20 years to 50 years and compression equipment has useful lives of 20 years to 50 years. The Company estimates that water pipelines, pumping stations and impoundment facilities have useful lives of 10 years to 15 years. As circumstances warrant, depreciation estimates are reviewed to determine if any changes in the underlying assumptions are necessary. Equitrans, L.P., the Company's FERC-regulated

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subsidiary, re-evaluates depreciation rates for its regulated property, plant and equipment each time it files with the FERC for a change in transmission, storage and gathering rates.

Intangible Assets. Intangible assets are recorded under the acquisition method of accounting at their estimated fair values at the acquisition date, which are calculated as the present value of estimated future cash flows using a risk-adjusted discount rate. The Company's intangible assets are amortized on a straight-line basis. The estimated annual amortization expense related to the intangible assets for each of the next five years is $64.8 million. See Note 3 for further detail.

The following tables summarize the Company's intangible assets as of December 31, 2021 and 2020:

		December 31, 2021
(In thousands)	Useful Life	Gross		Accumulated Amortization(a)		Net
Customer relationships	15 years	$	623,199	$	(171,726)	$	451,473
Eureka Midstream-related customer relationships	10.75 years	237,000		(48,144)		188,856
Hornet Midstream-related customer relationships	7.25 years	74,000		(62,558)		11,442
		$	934,199	$	(282,428)	$	651,771

		December 31, 2020
(In thousands)	Useful Life	Gross		Accumulated Amortization(a)		Net
Customer relationships	15 years	$	623,199	$	(130,180)	$	493,019
Eureka Midstream-related customer relationships	10.75 years	237,000		(27,160)		209,840
Hornet Midstream-related customer relationships	7.25 years	74,000		(60,269)		13,731
		$	934,199	$	(217,609)	$	716,590

(a)Impairment charge of $54.1 million is included within the Hornet Midstream-related customer relationships accumulated amortization. See Note 4 for further information.

Goodwill and Impairment of Long-Lived Assets. Goodwill is evaluated for impairment at least annually or whenever events or changes in circumstance indicate it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The Company may perform either a qualitative assessment of potential impairment or proceed directly to a quantitative assessment of potential impairment. The Company's qualitative assessment of potential impairment may result in the determination that a quantitative impairment analysis is not necessary. Under this elective process, the Company assesses qualitative factors to determine whether the existence of events or circumstances leads the Company to determine that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then a quantitative assessment is not required. However, if the Company concludes otherwise, a quantitative impairment analysis is performed.

If the Company chooses not to perform a qualitative assessment, or if it chooses to perform a qualitative assessment but is unable to qualitatively conclude that no impairment has occurred, then the Company will perform a quantitative assessment. In the case of a quantitative assessment, the Company estimates the fair value of the reporting unit with which the goodwill is associated and compares it to the carrying value. If the estimated fair value of a reporting unit is less than its carrying value, an impairment charge is recognized for the excess of the reporting unit's carrying value over its fair value. See Note 4 for further detail.

The Company evaluates long-lived assets for impairment when events or changes in circumstances indicate, in management's judgment, that the carrying value of such assets may not be recoverable. With respect to property, plant and equipment and finite lived intangibles, asset recoverability is measured by comparing the carrying value of the asset or asset group with its expected future pre-tax undiscounted cash flows. These cash flow estimates require the Company to make projections and assumptions for many years into the future for pricing, demand, competition, operating costs and other factors. If the carrying amount exceeds the expected future undiscounted cash flows, the Company recognizes an impairment equal to the excess of carrying value over fair value as determined by quoted market prices in active markets or present value techniques if quotes are unavailable. The determination of the fair value using present value techniques requires the Company to make projections and assumptions regarding the probability of a range of outcomes and the rates of interest used in the present value calculations. Any changes the Company makes to these projections and assumptions could result in significant revisions to its evaluations of recoverability and the recognition of additional impairments. See Note 4 for further discussion on impairments of long-lived assets.

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Investments in Unconsolidated Entities. The Company accounts for the investments in its unconsolidated entities under the equity method. The Company’s pro-rata share of net income in the unconsolidated entities is included in equity income in the Company’s statements of consolidated comprehensive income. Contributions to or distributions from the unconsolidated entities and the Company’s pro-rata share of net income in the unconsolidated entities are recorded as adjustments to the investment balance. The Company reviews the carrying value of its investments in unconsolidated entities for impairment whenever events or changes in circumstances indicate that the fair value may have declined in value. When there is evidence of loss in value that is other-than-temporary, the Company compares the investment's carrying value to its estimated fair value to determine whether impairment has occurred. If the carrying value exceeds the estimated fair value, the Company estimates and recognizes an impairment loss equal to the difference between the investment's carrying value and fair value. See Notes 4 and 9 for further detail.

Preferred Interest. EQT Energy Supply, LLC (EES), a subsidiary of EQT, generates revenue by providing services to a local distribution company. The preferred interest that the Company has in EES (the Preferred Interest) is accounted for as a note receivable and is presented in other assets in the consolidated balance sheets with the current portion reported in other current assets. Distributions received from EES are recorded as a reduction to the Preferred Interest and as interest income, which is included in net interest expense in the Company's statements of consolidated comprehensive income. The EES operating agreement provides for mandatory redemption of the Preferred Interest at the end of the preference period, which is expected to be December 31, 2034.

Unamortized Debt Discount and Issuance Costs. The Company amortizes debt discounts and issuance costs over the term of the related borrowing. Costs incurred from the issuance and/or extension, as applicable, of revolving credit facilities, including borrowings under the Amended EQM Credit Facility and the 2021 Eureka Credit Facility (each as defined in Note 11), are presented in other assets in the consolidated balance sheets. Debt discounts and issuance costs for all other debt instruments are presented as a reduction to debt on the consolidated balance sheets. See Note 11 for further detail.

Leases. Right-of-use assets represent the right to use the underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. Right-of-use assets and lease liabilities are recognized on the consolidated balance sheets at the lease commencement date based on the present value of lease payments over the lease term. The Company determines if an arrangement is a lease at inception based on whether the Company has the right to control the use of an identified asset, the right to obtain substantially all of the economic benefits from the use of the asset and the right to direct the use of the asset during the lease term and accounts for leases in accordance with ASC 842, Leases (ASC 842).

Leases in which the Company is the lessee that do not have a readily determinable implicit rate utilize an incremental borrowing rate, based on the information available at the lease commencement date, to determine the present value of lease payments. When a secured borrowing rate is not readily available, unsecured borrowing rates are adjusted for the effects of collateral to determine the incremental borrowing rate. The Company reassesses the incremental borrowing rate for any new and modified lease contracts as of the contract effective date. Lease expense is recognized on a straight-line basis over the lease term for operating leases. See Note 7.

Other Current Liabilities. The following table summarizes the Company's accrued liabilities as of December 31, 2021 and 2020.

	December 31,
	2021		2020
	(Thousands)
Accrued employee compensation	$	50,372	$	46,108
Non-income tax accruals	19,972		19,492
Current portion of operating lease liabilities	8,253		9,990
Other accrued liabilities	5,255		7,776
Total accrued liabilities	$	83,852	$	83,366

Asset Retirement Obligations (AROs). The Company has AROs related to its water system impoundments and to one of its gathering compressor stations, for which the Company recorded an associated liability and capitalized a corresponding amount to asset retirement costs. The liability relates to the expected future obligation to dismantle, reclaim and dispose of these assets and was estimated using the present value of expected future cash flows, adjusted for inflation and discounted at the Company's credit-adjusted, risk-free rate. The AROs are recorded in regulatory and other long-term liabilities on the consolidated balance sheets. Throughout 2021 and 2020, the Company undertook the reclamation process for certain water system impoundments, which reclamation process was completed as of December 31, 2021.

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The following table presents changes in the Company's AROs during 2021 and 2020.

	December 31,
	2021		2020
	(Thousands)
AROs at beginning of period	$	12,172	$	12,301
Liabilities settled	(1,609)		(724)
Revisions to estimated liabilities (a)	—		—
Accretion expense	678		595
AROs at end of period	$	11,241	$	12,172

(a)Revisions to estimated liabilities reflect changes in retirement cost assumptions and to the estimated timing of liability settlement.

The Company is not legally or contractually obligated to restore or dismantle its transmission and storage systems and its gathering systems, other than the one aforementioned gathering compressor station. The Company is legally required to operate and maintain these assets and intends to do so as long as supply and demand for natural gas exists, which the Company expects to continue into the foreseeable future. Therefore, the Company did not have any AROs related to its transmission and storage and gathering (other than the aforementioned gathering compressor station) assets as of December 31, 2021 and 2020.

Contingencies. The Company is involved in various regulatory and legal proceedings that arise in the ordinary course of business. A liability is recorded when the loss is probable and the amount of loss can be reasonably estimated. The Company considers many factors when making such assessments, including historical knowledge and matter specifics. Estimates are developed through consultation with legal counsel and analysis of the potential results. See Note 16.

Regulatory Accounting. Equitrans, L.P. owns all of the Company's FERC-regulated transmission and storage operations as well as its FERC-regulated low-pressure gathering assets. Therefore, Equitrans, L.P. is subject to FERC regulation. Through the rate-setting process, rate regulation allows Equitrans, L.P. to recover the costs of providing regulated services plus an allowed return on invested capital. Regulatory accounting allows Equitrans, L.P. to defer expenses and income to its consolidated balance sheets as regulatory assets and liabilities when it is probable that those expenses and income will be allowed in the rate-setting process for a period other than the period that they would be reflected in a non-regulated entity's statements of consolidated comprehensive income. Regulatory assets and liabilities are recognized in the Company's statements of consolidated comprehensive income in the period that the underlying expenses and income are reflected in the rates charged to shippers and operators. Equitrans, L.P. expects to continue to be subject to rate regulation that will provide for the recovery of deferred costs.

The following table summarizes Equitrans, L.P.'s regulatory assets and liabilities that are included in other assets and regulatory and other long-term liabilities, respectively, in the Company's consolidated balance sheets.

	December 31,
	2021		2020
	(Thousands)
Regulatory assets:
Deferred taxes (a)	$	91,989	$	89,243
Other recoverable costs (b)	3,654		4,960
Total regulatory assets	$	95,643	$	94,203
Regulatory liabilities:
Deferred taxes (a)	$	9,727	$	10,125
On-going post-retirement benefits other than pension and other reimbursable costs (c)	10,094		10,959
Total regulatory liabilities	$	19,821	$	21,084

(a)The regulatory asset from deferred taxes is primarily related to a historical deferred income tax position and taxes on the equity component of AFUDC. The regulatory liability from deferred taxes relates to the revaluation of a historical difference between the regulatory and tax bases of regulated property, plant and equipment. Equitrans, L.P. expects to recover the amortization of the deferred tax positions ratably over the depreciable lives of the underlying assets. Equitrans, L.P. also expects to recover the taxes on the equity component of AFUDC through future rates over the depreciable lives of the underlying long-lived assets.

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(b)The regulatory asset from other recoverable costs is primarily related to the costs associated with the Company's legacy post-retirement benefits plan.

(c)Equitrans, L.P. defers expenses for on-going post-retirement benefits other than pensions, which are subject to recovery in approved rates. The regulatory liability reflects lower cumulative actuarial expenses than the amounts recovered through rates.

The following tables present Equitrans, L.P.'s regulated operating revenues and operating expenses and property, plant and equipment included in the Company's statements of consolidated comprehensive income and consolidated balance sheets, respectively.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Operating revenues	$	403,634	$	397,319	$	396,847
Operating expenses	135,888		124,206		210,861

	December 31,
	2021		2020
	(Thousands)
Property, plant and equipment	$	1,901,924	$	1,878,312
Accumulated depreciation	(424,918)		(370,815)
Net property, plant and equipment	$	1,477,006	$	1,507,497

Gas imbalances occur when the actual amount of gas delivered from a pipeline system or storage facility varies from the amount of gas scheduled for delivery. The Company values gas imbalances due to/from shippers and operators at current index prices. Gas imbalances are settled in-kind, subject to the terms of the applicable FERC tariffs. As of December 31, 2021 and 2020, gas imbalance receivables were $1.9 million and $1.8 million, respectively, and are presented in other current assets, with offsetting amounts recorded to system gas, a component of property, plant and equipment, on the consolidated balance sheets. The Company classifies gas imbalances as current because they are expected to settle within one year.

Revenue Recognition. Revenue is measured based on considerations specific in a contract with a customer. The Company recognizes revenue under gathering, transmission and storage and water services contracts when it satisfies certain performance obligations, as discussed below.

The Company provides gathering, transmission and storage services in two manners: firm service and interruptible service. Firm service is provided under firm contracts, which are contracts for gathering, transmission or storage services that generally obligate the customer to pay a fixed, monthly charge to reserve an agreed upon amount of pipeline or storage capacity regardless of the capacity used by the customer during each month. Volumetric-based fees can also be charged under firm contracts for each firm volume transported, gathered or stored, as well as for volumes transported, gathered or stored in excess of the firm contracted volume, if capacity exists. Interruptible service contracts include volumetric-based fees, which are charges for the volume of gas gathered, transported or stored and generally do not guarantee access to the pipeline or storage facility. Firm and interruptible contracts can be short- or long-term in duration. Firm and interruptible transmission and storage service contracts are billed at the end of each calendar month, with payment typically due within 10 days. Firm and interruptible gathering contracts are billed on a one-month lag, with payment typically due within 21 days. Revenue related to gathering services provided but not yet billed is estimated each month. These estimates are generally based on contract data, preliminary throughput and allocation measurements.

Under a firm contract, the Company has a stand-ready obligation to provide the service over the life of the contract. The performance obligation for firm reservation fee revenue is satisfied over time as the pipeline capacity is made available to the customer. As such, the Company recognizes firm reservation fee revenue evenly over the contract period using a time-elapsed output method to measure progress. The performance obligation for volumetric-based fee revenue is generally satisfied upon the Company's monthly billing to the customer for volumes gathered, transported or stored during the month. The amount billed generally corresponds directly to the value of the Company's performance to date as the customer obtains value as each volume is gathered, transported or stored.

Water service revenues represent fees charged by the Company for the delivery of fresh and produced water to a customer at a specified delivery point and for the collection and recycling or disposal of flowback and produced water. The Company's water service revenues are generated under firm service and interruptible service contracts, which primarily utilize fixed prices per

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volume delivered. Firm service provides water services under firm contracts to customers with priority. Interruptible service contracts generally do not guarantee access to the water facilities. For fresh and produced water delivery service contracts, the only performance obligation in each contract is for the Company to provide water (usually a minimum daily volume of water) to the customer at a designated delivery point. For flowback and produced water, the performance obligation is collection and disposal of the water, which typically occur within the same day. Water service contracts are billed on a monthly basis, with payment typically due within 30 days.

For all contracts, the Company allocates the transaction price to each performance obligation based on the estimated relative standalone selling price. When applicable, the excess of consideration received over revenue recognized results in the deferral of those amounts until future periods based on a units of production or straight-line methodology as these methods appropriately match the consumption of services provided to the customer. The units of production methodology requires the use of production estimates that are uncertain and the use of judgment when developing estimates of future production volumes, thus impacting the rate of revenue recognition. Production estimates are monitored as circumstances and events warrant.

Certain of the Company's gas gathering and water services agreements, including the EQT Global GGA, are structured with MVCs, which specify minimum quantities for which a customer will be charged regardless of quantities gathered or delivered under the contract. Revenue is recognized for MVCs when the performance obligation has been met, which is the earlier of when the gas is gathered or water provided, or when it is remote that the producer will be able to meet its MVC. If a customer under such an agreement fails to meet its MVC for a specified period (thus not exercising all the contractual rights to gathering and water services within the specified period, herein referred to as “breakage”), it is obligated to pay a contractually determined fee based upon the shortfall between the actual volumes and the MVC for the period contained in the contract. See Note 6.

AFUDC. The Company capitalizes the carrying costs of financing the construction of certain long-lived, regulated assets. Such costs are amortized over the asset's estimated useful life and include interest costs (the debt component of AFUDC) and equity costs (the equity component of AFUDC). The debt component of AFUDC is recorded as a reduction to net interest expense on the statements of consolidated comprehensive income, and the equity component of AFUDC is recorded in other (expense) income, net, on the statements of consolidated comprehensive income. The debt component of AFUDC for the years ended December 31, 2021, 2020 and 2019 was $0.2 million, $0.3 million and $1.4 million, respectively, and the equity component of AFUDC for the years ended December 31, 2021, 2020 and 2019 was $0.3 million, $0.8 million and $5.7 million, respectively.

Share-Based Compensation. The Company recognizes share-based compensation expense based upon the estimated fair value of awards over the requisite service period. Time-based restricted units expected to be satisfied in cash are accounted for as liability awards recorded over the requisite service period, typically three years. The fair value of liability awards is remeasured at the end of each reporting period based on the closing price of the Company’s common stock. Time-based restricted stock awards expected to be satisfied in Company common stock are accounted for as equity awards and are recorded over the requisite service period, typically three years, based on the grant date fair value. Director phantom units expected to be satisfied in Company common stock vest on the date of grant and are recorded based on the grant date fair value. The grant date fair value, in both cases, is determined based upon the closing price of the Company's common stock on the day before the grant date. Forfeitures are accounted for as they occur.

For plans that include a performance condition that affects the number of awards that will ultimately vest, the probability that the performance condition will be achieved is reevaluated at the end of each reporting period and the payout multiplier is applied to the grant date fair value or measurement date fair value to record compensation expense, as applicable. For plans that include a market condition, compensation expense is based on a grant date fair value using a Monte Carlo simulation that remains constant throughout the vesting period for equity plans and a fair value based on a Monte Carlo simulation remeasured at each reporting period for liability plans. Each plan subject to a market condition is accounted for separately for each vesting tranche of the award. See Note 10.

Income Taxes. The Company files a consolidated income tax return for federal income taxes and the provision for income taxes is determined using the asset and liability approach of accounting for income taxes. Under this approach, the provision for income taxes represents income taxes paid or payable (or received or receivable) plus the change in deferred taxes for the current year. EQM is a limited partnership for U.S. federal and state income tax purposes. Eureka Midstream is a limited liability company for such purposes. EQM and Eureka Midstream are not subject to U.S. federal or state income taxes.

All of Eureka Midstream's income is, and for the period prior to the closing of the EQM Merger all of EQM's income was, included in the Company's pre-tax income; however, the Company does not record income tax expense on the portions of its income attributable to the noncontrolling member of Eureka Midstream and did not record income tax expense on the portions of its income attributable to the noncontrolling limited partners of EQM for the periods prior to the closing of the EQM Merger. This reduces the Company's effective tax rate in periods when the Company has consolidated pre-tax income and increases the effective tax rate in periods when the Company has consolidated pre-tax loss.

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Deferred taxes represent the future tax consequences of differences between the financial and tax bases of the Company's assets and liabilities. Deferred tax balances are adjusted for changes in tax rates and tax laws when enacted. Deferred tax assets are reflected on the consolidated balance sheets for net operating losses, credits or other attributes generated by the Company. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not (greater than 50%) that a tax benefit will not be realized. In evaluating the need for a valuation allowance, management considers all potential sources of taxable income, including income available in carry-back periods, future reversals of taxable temporary differences, projections of taxable income and income from tax planning strategies, as well as all available positive and negative evidence.

Deferred tax assets for which no valuation allowance is recorded may not be realized and changes in facts and circumstances may result in the establishment of a valuation allowance. Existing valuation allowances are re-examined under the same standards of positive and negative evidence that apply to valuation allowance establishment. If it is determined that it is more likely than not that a deferred tax asset for which a valuation is recorded will be realized, all or a portion of the valuation allowance may be released. Deferred tax assets and liabilities are also re-measured to reflect changes in underlying tax rates from tax law changes.

Tax benefits related to uncertain tax positions taken or expected to be taken on a tax return are recorded when such benefits meet a more likely than not threshold; otherwise, the tax benefit is recorded when the tax position has been effectively settled, either because the statute of limitations has expired or the appropriate taxing authority has completed its examination. Interest and penalties related to uncertain tax positions are recognized as part of the provision for income taxes and are accrued in the period that such interest and penalties would be applicable under relevant tax law until such time that the related tax benefits are recognized. See Note 14.

Noncontrolling Interests. Noncontrolling interests represent the portion of the equity of consolidated entities that are not wholly owned by the Company. Noncontrolling interests are reported as a component of shareholders’ equity in the consolidated balance sheets and are adjusted by the amount of net income earned by the entities with noncontrolling interests, distributions paid to noncontrolling interest holders and any changes in the noncontrolling ownership percentages. As of December 31, 2021 and 2020, the Company's noncontrolling interest consisted of the third-party ownership interest in Eureka Midstream.

For the period prior to the closing of the EQM Merger and for the year ended December 31, 2019, the Company's noncontrolling interests included the EQM common units not held by the Company or its affiliates. For the years ended December 31, 2021 and 2020, and for the period from April 10, 2019 to December 31, 2019, the Company's noncontrolling interests also included third-party ownership interests in Eureka Midstream. For the period from January 1, 2020 through the closing of the EQM Merger and the period April 10, 2019 through December 31, 2019, the Company’s noncontrolling interests also included the EQM Series A Preferred Unitholders' interest in EQM's net income. For the period beginning January 1, 2019 and ending January 10, 2019, the Company's noncontrolling interests included third-party ownership interests in EQGP.

Earnings Per Share (EPS). Basic EPS is computed by dividing net (loss) income attributable to Equitrans Midstream common shareholders by the weighted average number of shares of Equitrans Midstream common stock outstanding during the period. Diluted EPS is computed by dividing net (loss) income attributable to Equitrans Midstream by the weighted average number of shares of Equitrans Midstream common stock outstanding and the assumed issuance of all potentially dilutive securities. Each issue of potential common shares is evaluated separately in sequence from the most dilutive to the least dilutive. The dilutive effect of share-based payment awards and stock options is calculated using the treasury stock method, which assumes share purchases are calculated using the average share price of Equitrans Midstream common stock during the applicable period. The Company uses the if-converted method to compute potential common shares from potentially dilutive convertible securities. Under the if-converted method, dilutive convertible securities are assumed to be converted from the date of the issuance and the resulting common shares are included in the denominator of the diluted EPS calculation for the period being presented. Income attributable to preferred dividends on convertible preferred stock that accumulated during the period is added back to the numerator for purposes of the if-converted method. Diluted EPS also takes into consideration the potential dilution from securities issued by subsidiaries that enable their holders to obtain the subsidiary's common stock. See Note 13.

Recently Issued Accounting Standards

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848), which provides practical expedients for contract modifications and certain hedging relationships associated with the transition from reference rates that are expected to be discontinued. This guidance is applicable for the Amended EQM Credit Facility and the 2021 Eureka Credit Facility (each as defined in Note 11), as well as for each dividend following March 31, 2024 for the Equitrans Midstream Preferred Shares, which each use the London Inter-Bank Offered Rate (LIBOR) as a reference rate. The ASU was effective immediately but is only available through December 31, 2022. The Company is currently evaluating the potential impact of this standard on its financial statements.

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In August 2020, the FASB issued ASU 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the accounting for convertible debt and convertible preferred stock by removing the requirements to separately present certain conversion features in equity. In addition, the amendments in the ASU 2020-06 also simplify the guidance in ASC Subtopic 815-40, Derivatives and Hedging: Contracts in Entity’s Own Equity, by removing certain criteria that must be satisfied in order to classify a contract as equity. Finally, the amendments revise the guidance on calculating earnings per share, requiring use of the if-converted method for all convertible instruments and rescinding an entity’s ability to rebut the presumption of share settlement for instruments that may be settled in cash or other assets. The amendments are effective for fiscal years beginning after December 15, 2021. Adoption of the guidance must commence at the beginning of the annual fiscal year. The Company adopted this standard on January 1, 2022 and it had no impact on the Company's financial statements.

2.    Investments in Consolidated, Non-Wholly Owned Entities

EQM IDR Transaction. On February 22, 2019, the Company completed a simplification transaction pursuant to that certain Agreement and Plan of Merger, dated as of February 13, 2019, by and among the Company and certain related parties, pursuant to which, among other things, (i) Equitrans Merger Sub, LP merged with and into EQGP (the IDR Merger) with EQGP continuing as the surviving limited partnership and a wholly owned subsidiary of EQM, and (ii) each of (a) the IDRs in EQM, (b) the economic portion of the general partner interest in EQM and (c) the issued and outstanding common units representing limited partner interests in EQGP (EQGP common units) were canceled, and, as consideration for such cancellation, certain wholly owned subsidiaries of the Company received on a pro rata basis 80,000,000 newly-issued EQM common units and 7,000,000 newly-issued Class B units representing limited partner interests in EQM (Class B units), and the EQM General Partner retained the non-economic general partner interest in EQM (such transactions, collectively, the EQM IDR Transaction). Additionally, as part of the EQM IDR Transaction, 21,811,643 EQM common units held by EQGP were canceled and 21,811,643 EQM common units were issued pro rata to certain wholly owned subsidiaries of the Company. As a result of the EQM IDR Transaction, the EQM General Partner replaced EQM Midstream Services, LLC as the general partner of EQM.

After giving effect to the EQM IDR Transaction, including the issuance of Class B units, the Company indirectly owned a total of 117,245,455 EQM common units and all of the Class B units.

EQM Series A Preferred Units. On March 13, 2019, EQM entered into a Convertible Preferred Unit Purchase Agreement, together with Joinder Agreements entered into on March 18, 2019, with the Investors to issue and sell in a private placement (the Private Placement) an aggregate of 24,605,291 EQM Series A Preferred Units for a cash purchase price of $48.77 per EQM Series A Preferred Unit, resulting in total gross proceeds of approximately $1.2 billion. The net proceeds from the Private Placement were used in part to fund the purchase price in the Bolt-on Acquisition and to pay certain fees and expenses related to the Bolt-on Acquisition, and the remainder was used for general partnership purposes. The Private Placement closed concurrently with the closing of the Bolt-on Acquisition on April 10, 2019, as discussed further in Note 3. See below for a discussion on the Preferred Restructuring Agreement.

EQM Merger. As discussed in Note 1, on June 17, 2020, the Company, EQM, EQM LP, Merger Sub and the EQM General Partner completed the EQM Merger, pursuant to which Merger Sub merged with and into EQM, with EQM continuing and surviving as an indirect, wholly owned subsidiary of the Company. As a result of the EQM Merger, EQM is no longer a publicly traded entity.

At the Effective Time, subject to applicable tax withholding, (i) each outstanding EQM common unit, other than EQM common units owned by the Company and its subsidiaries, was converted into the right to receive 2.44 shares of Equitrans Midstream common stock (the Merger Consideration); (ii) (x) $600.0 million aggregate principal amount of the EQM Series A Preferred Units issued and outstanding immediately prior to the Effective Time were redeemed by EQM for cash at 101% of the EQM Series A Preferred Unit Purchase Price plus any accrued and unpaid distribution amounts and partial period distribution amounts, and (y) immediately following such redemption, each remaining issued and outstanding EQM Series A Preferred Unit was exchanged for 2.44 Equitrans Midstream Preferred Shares; and (iii) each outstanding phantom unit relating to an EQM common unit issued pursuant to the Amended and Restated EQGP Services, LLC 2012 Long-Term Incentive Plan, dated as of February 22, 2019 (the EQM LTIP), and any other award issued pursuant to the EQM LTIP, whether vested or unvested, was converted into the right to receive, with respect to each EQM common unit subject thereto, the Merger Consideration (plus any accrued but unpaid amounts in relation to distribution equivalent rights). The limited partner interests in EQM owned by the Company and its subsidiaries (including the Class B units) remained outstanding as limited partner interests in the surviving entity. The EQM General Partner continued to own the non-economic general partner interest in the surviving entity.

No fractional shares of Equitrans Midstream common stock were issued in the EQM Merger; instead, all fractions of Equitrans Midstream common stock to which an EQM common unitholder otherwise would have been entitled were aggregated and the resulting fraction was rounded up to the nearest whole share of Equitrans Midstream common stock.

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In connection with the EQM Merger at the Effective Time, the Company's omnibus and secondment agreements with EQM and certain other subsidiaries of the Company terminated, subject to the survival of certain license rights and indemnification obligations.

Because the Company controlled EQM both before and after the EQM Merger, the increase in the Company’s ownership interest in EQM resulting from the EQM Merger was accounted for as an equity transaction and reflected as a reduction of the noncontrolling interest associated with public ownership of EQM common units, offset by an increase in common stock, no par value. No gain or loss was recognized in the Company’s statements of consolidated comprehensive income as a result of the EQM Merger. In addition, the tax effects of the EQM Merger were reported as adjustments to deferred income taxes and Equitrans Midstream common stock, consistent with ASC 740, Income Taxes.

Immediately prior to the completion of the EQM Merger, the public limited partners collectively owned a 40.1% interest in EQM, excluding the impact of the EQM Series A Preferred Units. The publicly-owned EQM common units, prior to completion of the EQM Merger, were reflected within noncontrolling interest in the Company's consolidated balance sheets as of March 31, 2020. The portion of EQM earnings attributable to publicly-held EQM common units prior to completion of the EQM Merger was reflected in net income attributable to noncontrolling interests in the Company's statements of consolidated comprehensive income.

Additionally, for the period from January 1, 2020 to June 17, 2020, the Company determined that EQM was a variable interest entity. Through the Company's ownership and control of the general partner of EQM during that period, the Company had the power to direct the activities that most significantly affected EQM's economic performance. As a result of the EQM Merger, EQM is no longer a variable interest entity.

The Company recorded $23.8 million in expenses related to the EQM Merger and the EQT Global GGA (as defined in Note 4) during the year ended December 31, 2020. The expenses consisted of advisor, legal and accounting fees related to the transactions and are included in separation and other transaction costs in the statements of consolidated comprehensive income.

Preferred Restructuring Agreement. As discussed in Note 1, on June 17, 2020, concurrently with the closing of the EQM Merger: (i) EQM redeemed $600 million aggregate principal amount of the EQM Series A Preferred Units issued and outstanding immediately prior to the Effective Time for cash at 101% of the EQM Series A Preferred Unit Purchase Price plus any accrued and unpaid distribution amounts and partial period distribution amounts, and (ii) immediately following such redemption, each remaining issued and outstanding EQM Series A Preferred Unit was exchanged for 2.44 Equitrans Midstream Preferred Shares, in each case, in connection with the occurrence of the “Series A Change of Control” (as defined in the Former EQM Partnership Agreement) that occurred upon the closing of the EQM Merger. The Equitrans Midstream Preferred Shares issued were not registered under the Securities Act of 1933, as amended (the Securities Act), in reliance upon the exemption provided in Section 4(a)(2) of the Securities Act and/or Regulation D promulgated thereunder.

On June 17, 2020, the Company paid cash of $617.3 million to redeem $600 million aggregate principal amount of the Investors’ EQM Series A Preferred Units and pay partial period distributions on such EQM Series A Preferred Units. At the time of the redemption, the carrying value of the EQM Series A Preferred Units was $590.1 million, resulting in a premium over the carrying value of $27.3 million. The premium represented a return similar to distributions to the holders of the EQM Series A Preferred Units and, as such, reduced net income attributable to Equitrans Midstream common shareholders, and was recorded in retained earnings (deficit) in the statements of consolidated shareholders' equity and mezzanine equity.

Pursuant to the Restructuring Agreement, in connection with the Restructuring Closing, the Company filed a statement with respect to shares, attaching a Certificate of Designations (the Certificate of Designations), with the Pennsylvania Department of State on June 17, 2020 to, among other things, authorize and establish the designations, rights and preferences of the Equitrans Midstream Preferred Shares. On August 13, 2020, pursuant to the terms of the Certificate of Designations, the Company paid $10.9 million in the aggregate to holders of Equitrans Midstream Preferred Shares related to forgone partial period distributions on the EQM Series A Preferred Units that were converted into Equitrans Midstream Preferred Shares in connection with the EQM Merger.

The Company's Second Amended and Restated Articles of Incorporation (the Restated Articles) set forth the designations, rights and preferences of the Equitrans Midstream Preferred Shares.

The Equitrans Midstream Preferred Shares were a new class of security as of June 2020. They rank pari passu with any other outstanding class or series of preferred stock of the Company and senior to Equitrans Midstream common stock with respect to dividend rights and rights upon liquidation. The Equitrans Midstream Preferred Shares vote on an as-converted basis with Equitrans Midstream common stock and have certain other class voting rights with respect to any amendment to the Restated Articles that would be adverse (other than in a de minimis manner) to any of the rights, preferences or privileges of the Equitrans Midstream Preferred Shares.

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The holders of the Equitrans Midstream Preferred Shares receive cumulative quarterly dividends at a rate per annum of 9.75% for each quarter ending on or before March 31, 2024, and thereafter quarterly dividends at a rate per annum equal to the sum of (i) three-month LIBOR as of the LIBOR Determination Date (as defined in the Restated Articles) in respect of the applicable quarter and (ii) 8.15%; provided that such rate per annum in respect of periods after March 31, 2024 will not be less than 10.50%. The Company is not permitted to pay any dividends on any junior securities, including on Equitrans Midstream common stock, prior to paying the quarterly dividends payable to the Equitrans Midstream Preferred Shares, including any previously accrued and unpaid dividends.

Each holder of the Equitrans Midstream Preferred Shares may elect to convert all or any portion of the Equitrans Midstream Preferred Shares owned by it into Equitrans Midstream common stock initially on a one-for-one basis, subject to certain anti-dilution adjustments and an adjustment for any dividends that have accrued but not been paid when due and partial period dividends (referred to as the conversion rate), at any time (but not more often than once per fiscal quarter), provided that any conversion involves an aggregate number of Equitrans Midstream Preferred Shares of at least $20.0 million (calculated based on the closing price of Equitrans Midstream common stock on the trading day preceding notice of the conversion) or such lesser amount if such conversion relates to all of a holder’s remaining Equitrans Midstream Preferred Shares or if such conversion is approved by the Company's Board of Directors (Board).

So long as the holders of the Equitrans Midstream Preferred Shares have not elected to convert all of their Equitrans Midstream Preferred Shares into Equitrans Midstream common stock, the Company may elect to convert all of the Equitrans Midstream Preferred Shares into Equitrans Midstream common stock, at the then-applicable conversion rate, if (i) the shares of Equitrans Midstream common stock are listed for, or admitted to, trading on a national securities exchange, (ii) the closing price per share of Equitrans Midstream common stock on the national securities exchange on which the shares of Equitrans Midstream common stock are listed for, or admitted to, trading exceeds $27.99 for the 20 consecutive trading days immediately preceding notice of the conversion, (iii) the average daily trading volume of the Equitrans Midstream common stock on the national securities exchange on which the shares of Equitrans Midstream common stock are listed for, or admitted to, trading exceeds 1,000,000 shares (subject to certain adjustments) of Equitrans Midstream common stock for the 20 consecutive trading days immediately preceding notice of the conversion, (iv) the Company has an effective registration statement on file with the SEC covering resales of the shares of Equitrans Midstream common stock to be received by such holders upon any such conversion and (v) the Company has paid all prior accumulated and unpaid dividends in cash in full to the holders.

Upon certain events involving a Change of Control (as defined in the Restated Articles) in which more than 90% of the consideration payable to the Company, or to the holders of Equitrans Midstream common stock, is payable in cash, the Equitrans Midstream Preferred Shares will automatically convert into Equitrans Midstream common stock at a conversion ratio equal to the greater of (i) the quotient of (a) the sum of (x) $19.99 (such price, the Equitrans Midstream Preferred Share Issue Price) plus (y) any accrued and unpaid dividends as of such date, including any partial period dividends, with respect to the Equitrans Midstream Preferred Shares, divided by (b) the Equitrans Midstream Preferred Share Issue Price and (ii) the quotient of (a) the sum of (x)(1) the Equitrans Midstream Preferred Share Issue Price multiplied by (2) 110% plus (y) any accrued and unpaid dividends on such date, including any partial period dividends with respect to the Equitrans Midstream Preferred Shares, divided by (b) the volume weighted average price of the shares of Equitrans Midstream common stock for the 30-day period ending immediately prior to the execution of definitive documentation relating to the Change of Control.

In connection with other Change of Control events that do not satisfy the 90% cash consideration threshold described above, in addition to certain other conditions, each holder of Equitrans Midstream Preferred Shares may elect to (i) convert all, but not less than all, of its Equitrans Midstream Preferred Shares into Equitrans Midstream common stock at the then-applicable conversion rate, (ii) if the Company is not the surviving entity (or if the Company is the surviving entity, but Equitrans Midstream common stock will cease to be listed), require the Company to use commercially reasonable efforts to cause the surviving entity in any such transaction to deliver, in exchange for such holder's Equitrans Midstream Preferred Shares, a substantially equivalent security that has rights, preferences and privileges substantially equivalent to the Equitrans Midstream Preferred Shares (or if the Company is unable to cause such substantially equivalent securities to be issued, to exercise the option described in clause (i) or (iv) hereof or elect to convert such Equitrans Midstream Preferred Shares at a conversion ratio reflecting a multiple of invested capital), (iii) if the Company is the surviving entity, continue to hold the Equitrans Midstream Preferred Shares or (iv) require the Company to redeem the Equitrans Midstream Preferred Shares at a price per share equal to 101% of the Equitrans Midstream Preferred Share Issue Price, plus accrued and unpaid dividends, including any partial period dividends, on the applicable Equitrans Midstream Preferred Shares as of such date, which redemption price may be payable in cash, Equitrans Midstream common stock or a combination thereof at the election of the Board (and, if payable in Equitrans Midstream common stock, such Equitrans Midstream common stock will be issued at 95% of the volume-weighted average price of Equitrans Midstream common stock for the 20-day period ending on the fifth trading day immediately preceding the consummation of the Change of Control). Any holder of Equitrans Midstream Preferred Shares that requires the Company to

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redeem its Equitrans Midstream Preferred Shares pursuant to clause (iv) above will have the right to withdraw such election with respect to all, but not less than all, of its Equitrans Midstream Preferred Shares at any time prior to the fifth trading day immediately preceding the consummation of the Change of Control and instead elect to be treated in accordance with any of clauses (i), (ii) or (iii) above.

At any time on or after January 1, 2024, the Company will have the right, subject to applicable law, to redeem the Equitrans Midstream Preferred Shares, in whole or in part, by paying cash for each Equitrans Midstream Preferred Share to be redeemed in an amount equal to the greater of (a) the sum of (i)(1) the Equitrans Midstream Preferred Share Issue Price multiplied by (2) 110%, plus (ii) any accrued and unpaid dividends, including partial period dividends, with respect to the Equitrans Midstream Preferred Shares as of such date and (b) the amount the holder of such Equitrans Midstream Preferred Share would receive if such holder had converted such Equitrans Midstream Preferred Share into shares of Equitrans Midstream common stock at the then-applicable conversion ratio and the Company liquidated immediately thereafter.

Pursuant to the terms of the Restructuring Agreement, in connection with the Restructuring Closing, the Company entered into a registration rights agreement with the Investors (the Registration Rights Agreement) pursuant to which, among other things, the Company gave the Investors certain rights to require the Company to file and maintain one or more registration statements with respect to the resale of the Equitrans Midstream Preferred Shares and the shares of Equitrans Midstream common stock that are issuable upon conversion of the Equitrans Midstream Preferred Shares, and certain Investors have the right to require the Company to initiate underwritten offerings for the Equitrans Midstream Preferred Shares and the shares of Equitrans Midstream common stock that are issuable upon conversion of the Equitrans Midstream Preferred Shares.

During the year ended December 31, 2020, as a result of the Restructuring Closing, the Company recorded an increase in mezzanine equity of $667.2 million, a decrease in noncontrolling interest of $579.2 million and a decrease in common stock, no par value, of $100.5 million, net of deferred taxes of $12.5 million.

The Equitrans Midstream Preferred Shares are considered redeemable securities under GAAP due to the possibility of redemption outside the Company’s control. They are therefore presented as temporary equity in the mezzanine equity section of the Company’s consolidated balance sheets and are not considered to be a component of shareholders’ equity on the consolidated balance sheets. The Equitrans Midstream Preferred Shares were recorded at fair value as of the date of issuance, and income allocations increase the carrying value and declared dividends decrease the carrying value of the Equitrans Midstream Preferred Shares. As the Equitrans Midstream Preferred Shares are not currently redeemable and not probable of becoming redeemable, adjustment to the initial carrying amount is not necessary and would only be required if it becomes probable that the Equitrans Midstream Preferred Shares would become redeemable.

Investment in EQGP

EQGP Unit Purchases. On November 29, 2018, the Company entered into written agreements (the Unit Purchase Agreements) with certain investors owning an aggregate of 15,364,421 EQGP common units for $20.00 per EQGP common unit (the Purchase Price).

On December 31, 2018, the Company closed on the acquisition of an aggregate 14,560,281 EQGP common units pursuant to the Unit Purchase Agreements (the Initial Unit Purchase Closing) for an aggregate purchase price of $291.2 million. The Initial Unit Purchase Closing resulted in a reduction of additional paid-in capital of $46.8 million and a decrease in noncontrolling interest in consolidated subsidiaries of $244.4 million for the year ended December 31, 2018.

On January 2, 2019 and January 3, 2019, the Company closed on the acquisition of the remaining 804,140 EQGP common units that the Company did not purchase on December 31, 2018, pursuant to the Unit Purchase Agreements for an aggregate purchase price of $16.1 million (together with the Initial Unit Purchase Closing on December 31, 2018, the EQGP Unit Purchases).

EQGP Limited Call Right. Following the Initial Unit Purchase Closing, on December 31, 2018, the Company exercised a limited call right (the Limited Call Right and, together with the EQGP Unit Purchases, the EQGP Buyout) provided for in EQGP's agreement of limited partnership, dated as of October 12, 2018, pursuant to which the Company purchased all outstanding EQGP common units (other than those owned by the Company and its affiliates) at the Purchase Price. On January 10, 2019, the Company completed its exercise of the Limited Call Right by closing on the acquisition on the remaining 11,097,287 outstanding EQGP common units not owned by the Company or its affiliates for an aggregate purchase price of $221.9 million, and EQGP became an indirect, wholly owned subsidiary of the Company.

In connection with the completion of the EQGP Buyout on January 10, 2019, certain non-employee members of the Board of Directors of EQGP's general partner stepped down from their roles and were paid the Purchase Price for each EQGP phantom unit that they held, which was, in the aggregate, 29,829 EQGP phantom units, including accrued distributions.

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In addition, on January 10, 2019, EQGP's omnibus agreement with Equitrans Midstream was terminated.

Net Changes in Ownership of EQM

As a result of equity transactions relating to the Company's investment in EQM, the Company adjusted its noncontrolling interest and common stock, no par value, balances to reflect the resulting changes in ownership. During the year ended December 31, 2020, as a result of the EQM Merger, the Company recorded, in the aggregate, a $2.7 billion increase of common stock, no par value, a decrease in noncontrolling interest of $3.0 billion and an increase in deferred tax liability of $257.2 million. During the year ended December 31, 2019, as a result of the EQM IDR Transaction, the Company recorded, in the aggregate, a $997.2 million increase of common stock, no par value, a decrease in noncontrolling interest of $1.3 billion and a decrease in deferred tax asset of $340.4 million.

3.     Mergers and Acquisitions

EQM Merger. See Note 2.

Bolt-on Acquisition. On March 13, 2019, the Company entered into a Purchase and Sale Agreement with North Haven Infrastructure Partners II Buffalo Holdings, LLC (NHIP), an affiliate of Morgan Stanley Infrastructure Partners, pursuant to which the Company acquired from NHIP a 60% Class A interest in Eureka Midstream and a 100% interest in Hornet Midstream (collectively, the Bolt-on Acquisition) for total consideration of approximately $1.04 billion, composed of approximately $852 million in cash, net of purchase price adjustments, and approximately $192 million in assumed pro-rata debt. At the time of the acquisition, Eureka Midstream owned an approximately 190-mile gathering header pipeline system in Ohio and West Virginia that services both dry Utica and wet Marcellus Shale production and Hornet Midstream owned an approximately 15-mile, high-pressure gathering system in West Virginia that connects to the Eureka Midstream system. The Bolt-on Acquisition closed on April 10, 2019 and was funded through proceeds from the Private Placement of the EQM Series A Preferred Units that closed concurrently with the Bolt-on Acquisition. See Note 2 for further information regarding the Private Placement.

At the closing of the Bolt-on Acquisition, a subsidiary of Hornet Midstream terminated all of its obligations under its term loan credit agreement and repaid the $28.2 million outstanding principal balance and $0.1 million in related interest and fees.

The Company recorded $17.0 million in acquisition-related expenses related to the Bolt-on Acquisition during the year ended December 31, 2019. The Bolt-on Acquisition acquisition-related expenses included $15.3 million for professional fees and $1.7 million for compensation arrangements during the year ended December 31, 2019, and are included in separation and other transaction costs in the statements of consolidated comprehensive income.

The Bolt-on Acquisition was accounted for as a business combination using the acquisition method. As a result of the acquisition, the Company recognized $99.2 million of goodwill, which was allocated to the Gathering segment. Such goodwill primarily related to additional commercial opportunities, a diversified producer customer mix, increased exposure to dry Utica and wet Marcellus acreage and operating leverage within the Gathering segment. The purchase price allocation and related adjustments were finalized during the fourth quarter of 2019. The following table summarizes the final purchase price and allocation of the fair value of the assets acquired and liabilities assumed in the Bolt-on Acquisition as of April 10, 2019 by the Company, as well as certain measurement period adjustments made subsequent to the Company's initial valuation.

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(in thousands)	Preliminary Purchase Price Allocation (As initially reported)		Measurement Period Adjustments (a)		Purchase Price Allocation (As adjusted)
Consideration given:
Cash consideration (b)	$	861,250	$	(11,404)	$	849,846
Buyout of portion of Eureka Midstream Class B units and incentive compensation	2,530		—		2,530
Total consideration	863,780		(11,404)		852,376
Fair value of liabilities assumed:
Current liabilities	52,458		(9,857)		42,601
Long-term debt	300,825		—		300,825
Other long-term liabilities	10,203		—		10,203
Amount attributable to liabilities assumed	363,486		(9,857)		353,629
Fair value of assets acquired:
Cash	15,145		—		15,145
Accounts receivable	16,817		—		16,817
Inventory	12,991		(26)		12,965
Other current assets	882		—		882
Net property, plant and equipment	1,222,284		(8,906)		1,213,378
Intangible assets (c)	317,000		(6,000)		311,000
Deferred tax asset	5,773		(5,268)		505
Other assets	14,567		—		14,567
Amount attributable to assets acquired	1,605,459		(20,200)		1,585,259
Noncontrolling interests	(486,062)		7,602		(478,460)
Goodwill as of April 10, 2019	$	107,869	$	(8,663)	$	99,206
Impairment of goodwill (d)					(99,206)
Goodwill as of December 31, 2019					$	—

(a)    The Company recorded measurement period adjustments to its preliminary acquisition date fair values due to the refinement of its valuation models, assumptions and inputs. The measurement period adjustments were based upon information obtained about facts and circumstances that existed at the acquisition date that, if known, would have affected the measurement of the amounts recognized at that date.

(b)     The cash consideration for the Bolt-on Acquisition was adjusted by approximately $11.4 million related to working capital adjustments and the release of all escrowed indemnification funds to the Company.

(c)    After considering the refinements to the valuation models, the Company estimated the fair value of the customer-related intangible assets acquired as part of the Bolt-on Acquisition to be $311.0 million. As a result, the fair value of the customer-related intangible assets was decreased by $6.0 million on September 30, 2019 with a corresponding increase to goodwill. In addition, the change to the provisional amount resulted in a decrease in amortization expense and accumulated amortization of approximately $0.4 million.

(d)    During the third quarter of 2019, the Company identified impairment indicators that suggested the fair value of its goodwill was more likely than not below its carrying amount. As such, the Company performed an interim goodwill impairment assessment, which resulted in the Company recognizing impairment to goodwill of approximately $268.1 million, of which $99.2 million was associated with its Eureka/Hornet reporting unit, bringing the reporting unit's goodwill balance to zero. See Note 4 for further detail.

The estimated fair value of midstream facilities and equipment, generally consisting of pipeline systems and compression stations, was estimated using the cost approach. Significant unobservable inputs in the estimate of fair value under this approach included management's assumptions about the replacement costs for similar assets, the relative age of the acquired assets and any potential economic or functional obsolescence associated with the acquired assets. As a result, the estimated fair value of the midstream facilities and equipment represented a Level 3 fair value measurement.

As a result of the acquisition, the noncontrolling interest in Eureka Midstream was estimated to be $478.5 million. The fair value of the noncontrolling interest was calculated based on the enterprise value of Eureka Midstream and the percentage ownership not acquired by the Company. Significant unobservable inputs in the enterprise value of Eureka Midstream include

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future revenue estimates and future cost assumptions. As a result, the fair value measurement is based on significant inputs that are not observable in the market and thus represents a Level 3 fair value measurement.

As part of the preliminary purchase price allocation, the Company identified intangible assets for customer relationships with third-party customers. The fair value of the customer relationships with third-party customers was determined using the income approach, which requires a forecast of the expected future cash flows generated and an estimated market-based weighted average cost of capital. Significant unobservable inputs in the determination of fair value include future revenue estimates, future cost assumptions and estimated customer retention rates. As a result, the estimated fair value of the identified intangible assets represents a Level 3 fair value measurement. The Company previously utilized a useful life of 20 years for the Eureka Midstream- and Hornet Midstream-related intangible assets. As a result of then-expected changes in cash flows due to decreases in producer activity driven by lower natural gas prices in periods subsequent to the Bolt-on Acquisition closing, as of April 1, 2020, the Company prospectively changed the remaining useful life of the Eureka Midstream-related intangible assets to 10.75 years, increasing the expected annual amortization expense by $9.1 million. In addition, as a result of then-expected reductions in future cash flows, as of October 1, 2019, the useful life of the Hornet Midstream-related intangible assets was prospectively changed to 7.25 years.

In conjunction with the Bolt-on Acquisition, the Company recorded tax deductible goodwill of $43.0 million. The Company does not have tax basis on the portion attributable to the former noncontrolling limited partners of EQM.

Post-Acquisition Operating Results. Subsequent to the completion of the Bolt-on Acquisition, Eureka Midstream and Hornet Midstream collectively contributed the following to both the Gathering segment and the Company's consolidated operating results for the period from April 10, 2019 through December 31, 2019.

(in thousands)	April 10, 2019 Through December 31, 2019
Operating revenues	$	97,123
Operating loss attributable to Equitrans Midstream	$	(94,551)
Net loss attributable to noncontrolling interests	$	(21,291)
Net loss attributable to Equitrans Midstream	$	(80,631)

Unaudited Pro Forma Information. The following unaudited pro forma combined financial information presents the Company's results as though the EQGP Buyout, EQM IDR Transaction and Bolt-on Acquisition had been completed at January 1, 2019. The pro forma combined financial information has been included for comparative purposes and is not necessarily indicative of the results that might have actually occurred had the EQGP Buyout, EQM IDR Transaction and Bolt-on Acquisition taken place on January 1, 2019; furthermore, the financial information is not intended to be a projection of future results.

(in thousands, except per share data)	December 31, 2019
Pro forma operating revenues	$	1,661,822
Pro forma net loss	$	(44,167)
Pro forma net income attributable to noncontrolling interests	$	126,558
Pro forma net loss attributable to Equitrans Midstream	$	(170,725)
Pro forma loss per share (basic)	$	(0.67)
Pro forma loss per share (diluted)	$	(0.67)

4.     Impairments of Long-Lived Assets

Goodwill. The three reporting units to which the Company had goodwill during 2019 were (i) the Ohio gathering assets that were acquired in certain prior acquisitions (collectively, Rice Retained Midstream), (ii) the Pennsylvania gathering assets acquired by EQM from Rice Midstream Partners LP (n/k/a RM Partners LP) (RMP) and its general partner (RMP PA Gas Gathering reporting unit) and (iii) the Ohio and West Virginia gathering assets acquired in the Bolt-on Acquisition (Eureka/Hornet, collectively with Rice Retained Midstream and RMP PA Gas Gathering, the Reporting Units).

During the third quarter of 2019, the Company identified impairment indicators in the form of significant declines in the unit price of EQM common units and corresponding market capitalization, primarily as a result of continued suppressed natural gas prices and decreased producer drilling activity. Management considered these declines as indicators that the fair value of goodwill was more likely than not below the carrying amounts for the respective Reporting Units. As such, the performance of an interim goodwill impairment assessment was required. In estimating the fair value of each of the Reporting Units, the Company used a combination of the income approach and the market approach. The Company used the income approach’s

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discounted cash flow method, which applies significant inputs not observable in the public market (Level 3), including estimates and assumptions related to the use of an appropriate discount rate, future throughput volumes, operating costs, capital spending and changes in working capital. The Company used the market approach’s comparable company and reference transaction methods. The comparable company method evaluates the value of a company using metrics of other businesses of similar size and industry. The reference transaction method evaluates the value of a company based on pricing multiples derived from similar transactions entered into by similar companies.

As of August 31, 2019, the Company determined that the fair value of Rice Retained Midstream was greater than its carrying value; however, the carrying values of RMP PA Gas Gathering and Eureka/Hornet were each greater than their respective fair values. As a result, the Company recognized impairment of goodwill of $168.9 million and $99.2 million on RMP PA Gas Gathering and Eureka/Hornet, respectively. The non-cash impairment charges are included in the impairments of long-lived assets line on the Company's statements of consolidated comprehensive income.

During the fourth quarter of 2019, as of the date of the Company’s annual goodwill impairment assessment, the Company concluded the performance of a quantitative impairment assessment was required. Factors contributing to this conclusion were the continued decline of the Company's market capitalization in the fourth quarter and the sustained declines in producer drilling activity driven by market conditions including natural gas pricing.

Consistent with the third quarter 2019 interim goodwill impairment assessment, the Company used the income approach’s discounted cash flow method and the market approach’s comparable company and reference transaction methods. During the Company’s fourth quarter 2019 impairment assessment, the Company determined that the carrying values of RMP PA Gas Gathering and Rice Retained Midstream were each greater than their respective fair values. As a result, the Company recognized impairment of goodwill of $433.2 million and $150.5 million on RMP PA Gas Gathering and Rice Retained Midstream, respectively. The non-cash impairment charge is included in the impairments of long-lived assets line on the Company's statements of consolidated comprehensive income.

The following table summarizes the carrying amount of goodwill associated with the Company's Reporting Units for the years ended December 31, 2021, 2020 and 2019.

	EQM Opco(a)		Rice Retained Midstream		Eureka/Hornet		Total
	(Thousands)
Gross Goodwill	$	1,350,721	$	150,489	$	—	$	1,501,210
Accumulated impairment losses	(261,941)		—		—		(261,941)
Goodwill as of January 1, 2019	1,088,780		150,489		—		1,239,269
Add: goodwill associated with Bolt-on Acquisition	—		—		99,206		99,206
Less: impairment of goodwill	(602,082)		(150,489)		(99,206)		(851,777)
Goodwill as of December 31, 2019	486,698		—		—		486,698
Goodwill as of December 31, 2020	486,698		—		—		486,698
Goodwill as of December 31, 2021	$	486,698	$	—	$	—	$	486,698
Gross Goodwill	$	1,350,721	$	150,489	$	99,206	$	1,600,416
Accumulated impairment losses	(864,023)		(150,489)		(99,206)		(1,113,718)
Goodwill as of December 31, 2021	$	486,698	$	—	$	—	$	486,698

(a) Effective on the EQT Global GGA Effective Date, the RMP PA Gas Gathering reporting unit was merged with and into the EQM Opco reporting unit, with the EQM Opco reporting unit surviving.

On February 26, 2020 (the EQT Global GGA Effective Date), the Company (through EQM) entered into a Gas Gathering and Compression Agreement (as amended, the EQT Global GGA) with EQT for the provision of certain gas gathering services to EQT in the Marcellus and Utica Shales of Pennsylvania and West Virginia (as further discussed in Note 6). Prior to the EQT Global GGA Effective Date, the Company operated three reportable operating segments and seven reporting units, which are one level below the operating segment level and are generally based on how segment management reviews the Company's operating results. Commencing with the EQT Global GGA Effective Date, the Company reduced its reporting units from seven to six and maintained its three reportable operating segments. As of the EQT Global GGA Effective Date, the only reporting unit to which the Company had goodwill recorded was the RMP PA Gas Gathering reporting unit. As a result of the EQT Global GGA, the assets under, and operations associated with, the RMP PA Gas Gathering reporting unit and the reporting unit associated with the gas gathering and compression activities of EQM Gathering Opco, LLC, an indirect wholly owned

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subsidiary of the Company (EQM Opco reporting unit), were combined to service a collective minimum volume commitment (MVC) under the agreement. Therefore, effective on the EQT Global GGA Effective Date, the RMP PA Gas Gathering reporting unit was merged with and into the EQM Opco reporting unit, with the EQM Opco reporting unit surviving.

During the first quarter of 2020, the Company identified impairment indicators in the form of significant declines in the unit price of EQM common units and corresponding market capitalization. Management considered these declines as indicators that the fair value of the RMP PA Gas Gathering reporting unit may have been below its carrying amount, and the performance of an interim quantitative goodwill impairment assessment was required. Additionally, as a result of the combination of the RMP PA Gas Gathering reporting unit and the EQM Opco reporting unit, the Company tested both the RMP PA Gas Gathering and the merged EQM Opco reporting units for goodwill impairment. In estimating the fair value of the RMP PA Gas Gathering and the merged EQM Opco reporting units, the Company used a combination of the income approach and the market approach, both as described above.

As a result of the interim assessment, the Company determined that the fair values of the RMP PA Gas Gathering reporting unit and the merged EQM Opco reporting unit, as applicable, were greater than their respective carrying values. No impairment to goodwill was recorded during the three months ended March 31, 2020. The Company believes the estimates and assumptions used in estimating its reporting units’ fair values are reasonable and appropriate; however, different assumptions and estimates could materially affect the calculated fair values of the RMP PA Gas Gathering reporting unit and the merged EQM Opco reporting unit and the resulting conclusions on impairment of goodwill, which could materially affect the Company’s results of operations and financial position. Additionally, actual results could differ from these estimates and assumptions may not be realized.

During the fourth quarter of 2020, the Company performed a quantitative impairment assessment as required as part of the annual goodwill impairment assessment. As a result of the annual assessment, the Company determined that the fair value of the EQM Opco reporting unit was greater than its carrying value. No impairment to goodwill was recorded as a result of the annual impairment assessment.

As of December 31, 2021, the Company's goodwill balance was associated entirely with the EQM Opco reporting unit. During the fourth quarter of 2021, the Company performed a quantitative impairment assessment as required as part of the annual goodwill impairment assessment. As a result of the annual assessment, the Company determined that the fair value of the EQM Opco reporting unit was greater than its carrying value. No impairment to goodwill was recorded as a result of the impairment assessment. However, the EQM Opco reporting unit is susceptible to impairment risk from future adverse market or economic conditions and Company-specific qualitative factors, contractual changes or modifications or other adverse factors such as unexpected future production curtailments by the Company's customers that have contracts with volumetric-based fees. Any such adverse changes in the future could reduce the underlying cash flows used to estimate fair value and could result in a decline in fair value that could trigger future impairment charges relating to the EQM Opco reporting unit.

Long-Lived Assets. During the third quarter of 2019, the Company assessed its long-lived asset groups for impairment due to the triggering events described in the 2019 interim goodwill impairment summary above. As a result of the recoverability test, management determined that the carrying value of certain long-lived assets associated with Eureka/Hornet (specifically, Hornet Midstream customer-related intangible assets) were not recoverable. The Company estimated the fair value of the Hornet Midstream-related intangible assets and determined that the fair value was not in excess of the assets’ carrying value, which resulted in an impairment charge of approximately $36.4 million related to certain of such intangible assets within the Company's Gathering segment. The non-cash impairment charge is included in the impairments of long-lived assets line on the statements of consolidated comprehensive income. During the fourth quarter of 2019, a triggering event occurred as a result of the Company's annual goodwill impairment evaluation, which required the Company to perform a recoverability test on its long-lived assets. No impairment to long-lived assets was recorded as a result of the recoverability test.

During 2019, the Company reassessed its asset groupings for its regulated pipelines due to certain regulatory ratemaking policy changes affecting the regulated pipelines, changes in strategic focus and plans for segmentation of operations. Prior to the second quarter of 2019, the Company defined its regulated asset grouping to include the FERC-regulated transmission and storage assets, integrated with the low-pressure assets due to overlapping operations, a shared costs structure and similar ratemaking structures. During the second quarter of 2019, Equitrans, L.P. reached a settlement related to its FERC Form 501-G report, which was focused solely on the Company’s FERC-regulated transmission and storage assets. Further, management increased its operational focus and emphasis on high-pressure gathering assets as illustrated by the consummation of the Bolt-on Acquisition. As a result of these regulatory changes and shift in operational focus, beginning with the second quarter of 2019, the Company grouped its FERC-regulated assets in two asset groupings: FERC-regulated transmission and storage assets and FERC-regulated low-pressure gathering assets. Upon the change in asset grouping, management evaluated whether any indicators of impairment were present and, in conjunction with the evaluation, the Company determined that the carrying values for the non-core FERC-regulated low-pressure gathering assets exceeded their undiscounted cash flows. Additionally,

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following the settlement related to the FERC Form 501-G report, management did not, and currently does not plan to, seek to recover the deficient cash flows through a future rate proceeding. The Company therefore estimated the fair values of FERC-regulated low-pressure gathering assets and determined that their fair values were not in excess of the assets’ carrying values, which resulted in recognized impairments of property and equipment of approximately $81.0 million during 2019 related to the assets within the Company's Gathering segment. As a result of the impairment, the assets carry no book value. The non-cash impairment charge is included in the impairments of long-lived assets line on the statements of consolidated comprehensive income.

As of March 31, 2020, the Company performed a recoverability test of the Hornet Midstream long-lived assets due to decreased producer activity. As a result of the recoverability test, management determined that the carrying value of the Hornet Midstream long-lived assets (which consisted of gathering assets and customer-related intangible assets) was not recoverable under ASC 360, Impairment Testing: Long-Lived Assets Classified as Held and Used. During the first quarter of 2020, the Company estimated the fair value of the Hornet Midstream asset group and determined that the fair value was not in excess of the assets’ carrying value, which resulted in impairment charges of approximately $37.9 million to the gathering assets and approximately $17.7 million to the customer-related intangible assets both within the Company’s Gathering segment. The non-cash impairment charges were recognized during the first quarter of 2020 and are included in the impairments of long-lived assets line on the statements of consolidated comprehensive income.

As of June 30, 2021, the Company performed a recoverability test of the Equitrans Water Services (OH) LLC (Ohio Water) long-lived assets due to decreased producer activity in Ohio within the Company's Water segment. As a result of the recoverability test, management determined that the carrying value of the Ohio Water long-lived assets was not recoverable under ASC 360, Impairment Testing: Long-Lived Assets Classified as Held and Used. The Company estimated the fair value of the Ohio Water asset group and determined that the fair value was less than the assets’ carrying value, which resulted in impairment charges of approximately $56.2 million to the Ohio Water assets within the Company's Water segment. The non-cash impairment charge was recognized during the second quarter of 2021 and is included in the impairments of long-lived assets line on the statements of consolidated comprehensive income.

Equity Method Investment. The Company is also required to evaluate its equity method investment in the MVP Joint Venture to determine whether it is impaired under ASC 323, Investments - Equity Method and Joint Ventures. The standard for determining whether an impairment must be recorded under ASC 323 is whether there occurred an other-than-temporary decline in value. The Company monitors events or circumstances that may indicate the carrying value of such investment may have experienced an other-than-temporary decline in value. The fair value of an equity method investment is generally estimated using an income approach under which significant judgments and assumptions include expected future cash flows, the appropriate discount rate and probability-weighted scenarios.

Events or circumstances that may be indicative of an other-than-temporary decline in value of an equity method investment include, but are not limited to:

•a prolonged period of time that the fair value is below the investor’s carrying value;

•the current expected financial performance is significantly worse than anticipated when the investor originally invested in the investee;

•adverse regulatory action is expected to substantially reduce the investee’s product demand or profitability;

•the investee has lost significant customers or suppliers with no immediate prospects for replacement;

•the investee’s discounted or undiscounted cash flows are below the investor’s carrying amount; and

•the investee’s industry is declining and significantly lags the performance of the economy as a whole.

The estimates that the Company makes with respect to its equity method investment are based upon assumptions that management believes are reasonable, and the impact of variations in these estimates or the underlying assumptions could be material. Additionally, if any joint venture to which the investment relates recognizes an impairment under ASC 360, the Company would be required to record its proportionate share of such impairment loss and would also evaluate such investment for an other-than-temporary decline in value under ASC 323.

During 2020, the MVP Joint Venture received certain adverse court rulings in the U.S. Fourth Circuit Court of Appeals. As a result, the Company evaluated its equity method investment in the MVP Joint Venture for impairment during the fourth quarter of 2020 and determined that the fair value of the investment continued to exceed the carrying value and, therefore, no impairment was necessary. The Company estimated the fair value of its investment in the MVP Joint Venture using an income

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approach that primarily considered probability-weighted scenarios of discounted future net cash flows based on the most recent estimate of total project costs and revenues as of December 31, 2020. These scenarios reflected assumptions and judgments regarding various future court decisions and regulatory authorizations and the impact that those decisions and authorizations may have on the timing and extent of the Company’s investment, including scenarios assuming the full resolution of permitting issues. The Company’s analysis took into account, among other things, growth expectations from additional compression expansion opportunities. The Company generally used an after-tax discount rate of 5.5% in the analysis derived based on a market participant approach. Based on the Company’s then expectations for the MVP Joint Venture's projects, and taking into account, among other things, regulatory considerations, public support for the MVP project by the Chairman of the U.S. Senate Committee on Energy and Natural Resources, and other publicly available information, the Company assigned higher probabilities for scenarios under which the Company received all required legal and regulatory approvals and authorizations and certain compression expansion opportunities are realized. A low probability was assigned to the scenario under which the project is cancelled.

During the fourth quarter of 2021, certain legal challenges before the Fourth Circuit regarding regulatory authorizations previously granted to the MVP Joint Venture were completed, other than the issuance of decisions in those matters. In connection with the completion of those proceedings, the Company identified as an indicator of an other-than-temporary decline in value the various uncertain legal outcomes and the potential impacts that certain unfavorable outcomes could have on the then targeted full in-service date for the MVP project and consequent timing for certain projects related thereto and total targeted MVP project costs. In January 2022, the Fourth Circuit vacated and remanded the MVP Joint Venture's authorizations related to the Jefferson National Forest (JNF) received from the Bureau of Land Management and the U.S. Forest Service and, in February 2022, the Fourth Circuit vacated and remanded the Biological Opinion and Incidental Take Statement issued by the U.S. Department of the Interior’s Fish and Wildlife Service for the MVP project. The Company considered these unfavorable decisions by the Fourth Circuit as supplemental evidence in evaluating its equity method investment in the MVP Joint Venture as of December 31, 2021, to determine if the investment’s carrying value exceeded the fair value and, if so, whether that the decline in value was other-than-temporary.

The Company estimated the fair value of its investment in the MVP Joint Venture using an income approach that primarily considered revised probability-weighted scenarios of discounted future net cash flows based on the estimates of total project costs and revenues. These scenarios reflected assumptions and judgments regarding the ultimate outcome of further matters relating to, or resulting from, the January and February 2022 Fourth Circuit rulings, as well as various other ongoing legal and regulatory matters affecting the MVP and MVP Southgate projects. Such assumptions and judgments also included certain additional potential delays and related cost increases that could result from unfavorable decisions on these proceedings and matters. The Company’s analysis also took into account, among other things, probability-weighted growth expectations from additional compression expansion opportunities. The Company generally used an after-tax discount rate of 5.5 percent in the analysis derived based on a market participant approach. The Company considered scenarios under which ongoing or new legal and regulatory matters further delay the completion and increase the total costs of the project; all required legal and regulatory approvals and authorizations and certain compression expansion opportunities are realized; and the MVP project is canceled. As a result of the assessment, the Company recognized a pre-tax impairment charge of $1.9 billion that reduced the carrying value of its equity investment in the MVP Joint Venture to approximately $1.2 billion as of December 31, 2021. Given the significant assumptions and judgments used in estimating the fair value of the Company's investment in the MVP Joint Venture, the fair value of the investment in the MVP Joint Venture represents a Level 3 measurement.

There is risk that the Company’s equity investment in the MVP Joint Venture may be further impaired in the future. There are ongoing (and may be future) legal and regulatory matters related to the MVP project, any of which could affect the ability to complete or operate the project, as well as legal and regulatory matters related to the MVP Southgate project that must be resolved in connection with the project. Assumptions and estimates utilized in assessing the fair value of the Company’s investment in the MVP Joint Venture may change depending on the nature or timing of resolutions to the legal and regulatory matters or based on other relevant developments. Adverse changes in circumstances relevant to the likelihood of project or expansion completion could prompt the Company, in future assessments, to apply a lower probability of project or expansion completion and such changes in assumptions or estimates (including probability) could have a material adverse effect on the fair value of the Company's investment in the MVP Joint Venture and potentially result in an additional impairment, which could have a material adverse effect on the Company's results of operations and financial position.

5.    Financial Information by Business Segment

The Company reports its operations in three segments that reflect its three lines of business of Gathering, Transmission and Water, which reflects the manner in which management evaluates the business for making operating decisions and assessing performance. Refer to Note 1 for discussion on business segments.

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	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Revenues from customers:
Gathering	$	862,053	$	1,012,281	$	1,159,931
Transmission	400,202		393,836		390,520
Water	54,782		104,708		79,791
Total operating revenues	$	1,317,037	$	1,510,825	$	1,630,242
Operating income (loss):
Gathering (a)	$	414,200	$	535,976	$	(88,850)
Transmission	274,526		275,369		277,731
Water (b)	(53,980)		38,756		15,305
Headquarters (c)	(1,183)		(25,540)		(128,186)
Total operating income	$	633,563	$	824,561	$	76,000
Reconciliation of operating income to net (loss) income:
Equity income (d)	$	17,579	$	233,833	$	163,279
Impairment of equity method investment (d)	(1,926,402)		—		—
Other (expense) income, net (e)	(16,104)		17,225		2,661
Loss on extinguishment of debt	(41,025)		(24,864)		—
Net interest expense	(378,650)		(307,380)		(256,195)
Income tax (benefit) expense	(345,091)		105,331		50,704
Net (loss) income	$	(1,365,948)	$	638,044	$	(64,959)

(a)Impairments of long-lived assets of $55.6 million and $854.3 million for the years ended December 31, 2020 and 2019, respectively, were included in Gathering operating income (loss). See Note 4 for further information.

(b)Impairments of long-lived assets of $56.2 million for the year ended December 31, 2021 was included in Water operating income (loss). See Note 4 for further information.

(c)Includes separation and other transaction costs and other unallocated corporate expenses.

(d)Equity income and impairment of equity method investment are included in the Transmission segment.

(e)Includes unrealized (loss) gain on derivative instruments recorded in the Gathering segment.

	December 31,
	2021		2020		2019
	(Thousands)
Segment assets:
Gathering	$	7,638,877	$	7,739,836	$	7,572,911
Transmission (a)	2,769,097		4,357,382		3,903,707
Water	151,151		185,802		202,440
Total operating segments	10,559,125		12,283,020		11,679,058
Headquarters, including cash	361,639		442,832		362,651
Total assets	$	10,920,764	$	12,725,852	$	12,041,709

(a)The equity investment in the MVP Joint Venture is included in the Transmission segment.

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	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Depreciation:
Gathering	$	188,633	$	172,967	$	144,310
Transmission	55,310		54,540		51,935
Water	25,233		30,880		26,915
Headquarters	1,228		1,226		4,204
Total	$	270,404	$	259,613	$	227,364
Expenditures for segment assets:
Gathering (a)	$	223,807	$	344,873	$	834,712
Transmission (b)	25,977		45,219		59,313
Water	34,877		11,905		37,457
Headquarters	1,494		4,004		9,779
Total (c)	$	286,155	$	406,001	$	941,261

(a)Includes approximately $14.1 million, $41.6 million and $25.9 million of capital expenditures related to noncontrolling interests in Eureka Midstream for the years ended December 31, 2021, 2020 and 2019, respectively.

(b)Transmission capital expenditures do not include capital contributions made to the MVP Joint Venture for the MVP and MVP Southgate projects of approximately $287.7 million, $272.8 million and $774.6 million for the years ended December 31, 2021, 2020 and 2019, respectively.

(c)The Company accrues capital expenditures when the work has been completed but the associated bills have not yet been paid. Accrued capital expenditures are excluded from the statements of consolidated cash flows until they are paid. The net impact of non-cash capital expenditures, including the effect of accrued capital expenditures, assumed capital expenditures associated with the Bolt-on Acquisition, transfers to/from inventory as assets are completed/assigned to a project and capitalized share-based compensation costs, was $4.4 million, $56.0 million and $26.1 million at December 31, 2021, 2020 and 2019, respectively.

6.     Revenue from Contracts with Customers

For the years ended December 31, 2021, 2020 and 2019, all revenues recognized on the Company's statements of consolidated comprehensive income are from contracts with customers. As of December 31, 2021 and 2020, all receivables recorded on the Company's consolidated balance sheets represent performance obligations that have been satisfied and for which an unconditional right to consideration exists.

Summary of disaggregated revenues. The tables below provide disaggregated revenue information by business segment.

	Year Ended December 31, 2021
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	468,156	$	366,323	$	5,063	$	839,542
Volumetric-based fee revenues	393,897		33,879		49,719		477,495
Total operating revenues	$	862,053	$	400,202	$	54,782	$	1,317,037

	Year Ended December 31, 2020
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	595,720	$	364,533	$	41,798	$	1,002,051
Volumetric-based fee revenues	416,561		29,303		62,910		508,774
Total operating revenues	$	1,012,281	$	393,836	$	104,708	$	1,510,825

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	Year Ended December 31, 2019
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	581,118	$	356,569	$	11,190	$	948,877
Volumetric-based fee revenues	578,813		33,951		68,601		681,365
Total operating revenues	$	1,159,931	$	390,520	$	79,791	$	1,630,242

(a)    For the years ended December 31, 2021 and 2020, firm reservation fee revenues associated with Gathering included approximately $11.3 million and $15.0 million, respectively, of MVC unbilled revenues. There were no MVC unbilled revenues associated with Gathering during the year ended December 31, 2019.

Contract assets. The Company recognizes contract assets primarily in instances where billing occurs subsequent to revenue recognition and the Company's right to invoice the customer is conditioned on something other than the passage of time. The Company's contract assets primarily consist of revenue recognized under contracts containing MVCs (whereby management has concluded (i) it is probable there will be a MVC deficiency payment at the end of the then-current MVC period, which is typically the period beginning at the inception of such contracts through the successive twelve-month periods after that date, and (ii) that a significant reversal of revenue recognized currently for the future MVC deficiency payment will not occur), as well as certain other contractual commitments. As a result, the Company's contract assets related to the Company's future MVC deficiency payments are generally expected to be collected within the next twelve months and are primarily included in other current assets in the Company's consolidated balance sheets until such time as the MVC deficiency payments are invoiced to the customer.

The following table presents changes in the Company's unbilled revenue balance during the years ended December 31, 2021 and 2020:

	Unbilled Revenue
	2021		2020
	(Thousands)
Balance as of beginning of period	$	18,618	$	—
Revenue recognized in excess of amounts invoiced (a)	26,779		28,446
Minimum volume commitments invoiced (b)	(28,442)		(9,828)
Amortization (c)	(183)		—
Balance as of end of period	$	16,772	$	18,618

(a) Primarily includes revenues associated with MVCs that are generally included in firm reservation fee revenues within the Gathering and Water segments. During the year ended December 31, 2021, also includes other contractual commitments of approximately $6.4 million.

(b) Unbilled revenues are transferred to accounts receivable once the Company has an unconditional right to consideration from the customer.

(c) Amortization of capitalized contract costs paid to customers over the expected life of the agreement.

Contract liabilities. The Company's contract liabilities consist of deferred revenue primarily associated with the EQT Global GGA, including advance payments from EQT associated with the Rate Relief Shares (as defined below) acquired by the Company as consideration for certain commercial terms and the initial fair value of the Henry Hub cash bonus payment provision (as defined below). The contract liabilities are classified as current or non-current according to when such amounts are expected to be recognized. As of December 31, 2021, total contract liabilities were $822.4 million, of which $1.1 million was classified as current and recorded in accrued liabilities and $821.3 million was classified as non-current and recorded in contract liability on the Company's consolidated balance sheets. As of December 31, 2020, the contract liabilities were $398.8 million, which was recorded in contract liability on the Company's consolidated balance sheets.

Contracts requiring advance payments and the recognition of contract liabilities are evaluated to determine whether the advance payments provide the Company with a significant financing benefit. This determination requires significant judgment and is based on the combined effect of the expected length of time between when the Company transfers the promised goods or services to the customer and when the customer pays for those goods or services and the prevailing interest rates. The Company has assessed the EQT Global GGA and determined that this agreement does not contain a significant financing component.

The following table presents changes in the Company's contract liability balances during the years ended December 31, 2021 and 2020:

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	Contract Liability
	2021		2020
	(Thousands)
Balance as of beginning of period	$	398,750	$	—
Amounts recorded during the period (a)	300,496		398,750
Change in estimated variable consideration (b)	123,707		—
Amounts transferred during the period (c)	(537)		—
Balance as of end of period	$	822,416	$	398,750

(a) Includes deferred billed revenue during the years ended December 31, 2021 and 2020 primarily associated with the EQT Global GGA.

(b) Change in estimated variable consideration represents the increase in total deferred revenue required for gathering MVC revenue with a declining rate structure, resulting from contractual amendments that required total estimated gathering consideration to be reduced. See 'EQT Global GGA' discussion below for additional information on the contractual amendments.

(c)    Deferred revenues are recognized as revenue upon satisfaction of the Company's performance obligation to the customer.

Summary of remaining performance obligations. The following table summarizes the estimated transaction price allocated to the Company's remaining performance obligations under all contracts with firm reservation fees and MVCs as of December 31, 2021 that the Company will invoice or transfer from contract liabilities and recognize in future periods.

	2022		2023		2024		2025		2026		Thereafter		Total
	(Thousands)
Gathering firm reservation fees	$	88,587	$	105,667	$	157,484	$	149,923	$	141,091	$	1,277,200	$	1,919,952
Gathering revenues supported by MVCs	441,202		454,236		426,929		445,958		457,120		3,462,805		5,688,250
Transmission firm reservation fees	362,096		358,222		375,984		362,814		357,910		3,222,117		5,039,143
Water revenues supported by MVCs	33,313		37,500		37,500		37,500		37,500		193,750		377,063
Total (a)	$	925,198	$	955,625	$	997,897	$	996,195	$	993,621	$	8,155,872	$	13,024,408

(a) Includes assumptions regarding timing for placing certain projects in-service. Such assumptions may not be realized and delays in the in-service dates for projects have substantially altered, and additional delays may further substantially alter, the remaining performance obligations for certain contracts with firm reservation fees and/or MVCs. The MVP Joint Venture is accounted for as an equity investment and those amounts are not included in the table above.

Based on total projected contractual revenues, including projected contractual revenues from future capacity expected from expansion projects that are not yet fully constructed for which the Company has executed firm contracts, the Company's firm gathering contracts and firm transmission and storage contracts had weighted average remaining terms of approximately 14 years and 13 years, respectively, as of December 31, 2021.

EQT Global GGA. On the EQT Global GGA Effective Date, the Company entered into the EQT Global GGA with EQT for the provision by the Company of certain gas gathering services to EQT in the Marcellus and Utica Shales of Pennsylvania and West Virginia. Pursuant to the EQT Global GGA, EQT is subject to an initial annual MVC of 3.0 Bcf per day that gradually steps up to 4.0 Bcf per day through December 2031 following the full in-service date of the MVP. The EQT Global GGA runs from the EQT Global GGA Effective Date through December 31, 2035, and will renew annually thereafter unless terminated by EQT or the Company pursuant to its terms. Pursuant to the EQT Global GGA, the Company has certain obligations to build connections to connect EQT wells to the Company's gathering system, which are subject to geographical limitations in relation to the dedicated area in Pennsylvania and West Virginia, as well as the distance of such connections to the Company's then-existing gathering system. Management has estimated the total consideration expected to be received over the life of the EQT Global GGA, including gathering MVC revenue with a declining rate structure, the gathering fee credit for certain gathered volumes that also receive separate transmission services under certain transmission contracts (including the FTS (defined below)), the fair value of the Rate Relief Shares (as defined below) and the initial fair value of the Henry Hub cash bonus payment provision. From time to time, and at a minimum, at each reporting date, management reviews and updates, as necessary, the assumptions utilized to estimate the total consideration of the EQT Global GGA. The total consideration is allocated proportionally to the performance obligation under the contract, which is to provide daily MVC capacity over the life of the contract, in order to recognize revenue in accordance with ASC 606, Revenue from Contracts with Customers. The performance obligations will be satisfied during the life of the contract based on a units of production methodology for the daily MVC capacity provided to EQT. Due to the declining rate structure, there will be periods during which the billable gathering MVC revenue will exceed the allocated consideration to the performance obligation, which will result in billable gathering

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MVC revenue being deferred to the contract liability. The deferred consideration amounts are deferred until recognized in revenue when the associated performance obligation has been satisfied and are classified as current or non-current according to when such amounts are expected to be recognized. In addition to the estimated total consideration allocated to the daily MVC, the EQT Global GGA includes other fees based on variable or volumetric-based services that will be recognized in the period the services are provided. The Company applied judgment in determining the balance sheet classification of the elements of the EQT Global GGA and Share Purchase Agreements (as defined below) under the applicable accounting guidance.

The gathering MVC fees payable by EQT to the Company set forth in the EQT Global GGA are subject to potential reductions for certain contract years as set forth in the EQT Global GGA, conditioned to begin the first day of the quarter in which the full in-service date of the MVP occurs, which provide for estimated aggregate fee relief of approximately $270 million in the first twelve-month period, approximately $230 million in the second twelve-month period and approximately $35 million in the third twelve-month period. Further, the EQT Global GGA provides for a fee credit to the gathering rate for certain gathered volumes that also receive separate transmission services under certain transmission contracts. In addition, given that the MVP full in-service date did not occur by January 1, 2022, EQT has an option until December 31, 2022, to forgo approximately $145 million of the gathering fee relief in such first twelve-month period and approximately $90 million of the gathering fee relief in such second twelve-month period in exchange for a cash payment from the Company to EQT in the amount of approximately $196 million (the EQT Cash Option). As consideration for the additional rate relief subject to the EQT Cash Option, the Company purchased shares of its common stock (see Rate Relief Shares discussed and defined below) from EQT. The consideration received for future contractual rate relief associated with the Rate Relief Shares was recorded at a fair value of approximately $121.5 million as a contract liability in accordance with ASC 606 and will be recognized as revenue over the life of the contract.

During the fourth quarter of 2021, the Company entered into two amendments to an agreement for firm transportation service (FTS) with EQT that, subject to the satisfaction of certain conditions, would have the effect of extending the primary term of the FTS. As a result of the potential extension, management reassessed the expected gathering fee credit assumptions and, as a result of the impacts to such assumptions, the total consideration expected under the EQT Global GGA was reduced. The Company recognized a cumulative adjustment that decreased revenue and increased contract liability by $123.7 million, respectively, during the year ended December 31, 2021. The cumulative adjustment had no impact to the amount billed to and cash collected from EQT under the EQT Global GGA.

The EQT Global GGA provides for potential cash bonus payments payable by EQT to the Company during the period beginning on the first day of the calendar quarter in which the MVP full in-service date occurs through the calendar quarter ending December 31, 2024 (the Henry Hub cash bonus payment provision). The potential cash bonus payments are conditioned upon the quarterly average of certain Henry Hub natural gas prices exceeding certain price thresholds. The Henry Hub cash bonus payment provision meets the definition of an embedded derivative that was required to be bifurcated from the host contract and accounted for separately in accordance with ASC 815, Derivatives and Hedging. The embedded derivative was recorded as a derivative asset at its estimated fair value at inception of approximately $51.5 million and as part of the contract liability to be included in the total consideration to be allocated to the performance obligation under ASC 606. Subsequent changes to the fair value of the derivative instrument through the end of the contract are recognized in other (expense) income, net, on the Company's statements of consolidated comprehensive income.

Water Services Letter Agreement and 2021 Water Services Agreement. On February 26, 2020, the Company entered into a letter agreement with EQT relating to the provision of water services in Pennsylvania (such letter agreement, the Water Services Letter Agreement). Subject to the effect of the 2021 Water Services Agreement (as defined below), the Water Services Letter Agreement would have been effective as of the first day of the first month following the MVP full in-service date and would have expired on the fifth anniversary of such date. During each year of the Water Services Letter Agreement, EQT had agreed to pay the Company a minimum $60 million per year Annual Revenue Commitment (ARC) for volumetric water services provided in Pennsylvania, all in accordance with existing water service agreements and new water service agreements entered into between the parties pursuant to the Water Services Letter Agreement (or the related agreements).

On October 22, 2021, the Company and EQT entered into a new 10-year, mixed-use water services agreement covering operations within a dedicated area in southwestern Pennsylvania (as subsequently amended, the 2021 Water Services Agreement). The 2021 Water Services Agreement, which upon its effectiveness, replaces the Water Services Letter Agreement and certain other existing Pennsylvania water services agreements, will become effective with the commencement of water delivery service to a certain EQT well pad (anticipated in the first quarter of 2022). Pursuant to the 2021 Water Services Agreement, EQT has agreed to pay the Company a minimum ARC for water services equal to $40 million in each of the first five years of the 10-year contract term and equal to $35 million per year for the remaining five years of the contract term.

Share Purchase Agreements. On February 26, 2020, the Company entered into two share purchase agreements (the Share Purchase Agreements) with EQT, pursuant to which the Company agreed to (i) purchase 4,769,496 shares of Equitrans Midstream common stock (the Cash Shares) from EQT in exchange for approximately $46 million in cash, (ii) purchase

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20,530,256 shares of Equitrans Midstream common stock (the Rate Relief Shares and, together with the Cash Shares, the Share Purchases) from EQT in exchange for a promissory note in the aggregate principal amount of approximately $196 million (which EQT subsequently assigned to EQM as consideration for certain commercial terms under the EQT Global GGA), and (iii) pay EQT cash in the amount of approximately $7 million (the Cash Amount). On March 5, 2020, the Company completed the Share Purchases and paid the Cash Amount. The Company used proceeds from the EQM Credit Facility (defined in Note 11) to fund the purchase of the Cash Shares and to pay the Cash Amount in addition to other uses of proceeds. After the closing of the Share Purchases, the Company retired the Cash Shares and the Rate Relief Shares. Additionally, the Company recorded a $17.2 million deferred tax liability in conjunction with the Rate Relief Shares. On September 29, 2020, the Company made a prepayment to EQM of all principal, interest, fees and other obligations outstanding under the promissory note EQT assigned to EQM and the promissory note was terminated.

7.     Leases

The Company has certain facility and compressor operating lease contracts that are classified as operating leases in accordance with ASC 842. Leases with an initial term of 12 months or less are considered short-term and are not recorded on the balance sheet. Instead, the short-term leases are recognized in expense on a straight-line basis over the lease term. Upon the adoption of ASC 842 on January 1, 2019, the Company recorded an operating lease right-of-use asset and a corresponding operating lease liability of $49.7 million on its consolidated balance sheets, reflecting the then present value of future lease payments on the Company's facility and compressor lease contracts. As of December 31, 2021 and 2020, the Company had no lease contracts classified as financing leases and was not a lessor; however, the Company was party to a subleasing arrangement whereby the Company, as sublessor, agreed to sublet office space to a third party.

The following table summarizes lease cost for the years ended December 31, 2021, 2020 and 2019:

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Operating lease cost	$	12,571	$	14,464	$	12,858
Short-term lease cost	6,057		5,075		4,642
Variable lease cost	7		168		321
Sublease income	(492)		(583)		(445)
Total lease cost	$	18,143	$	19,124	$	17,376

Operating lease expense related to the Company's compressor lease contracts and facility lease contracts is reported in operating and maintenance expense and selling, general and administrative expense, respectively, on the Company's statements of consolidated comprehensive income.

For the years ended December 31, 2021, 2020 and 2019, cash paid for operating lease liabilities was $12.8 million, $14.8 million and $12.3 million, respectively, which was reported in cash flows provided by operating activities on the statements of consolidated cash flows.

The operating lease right-of-use assets are reported in other assets and the current and noncurrent portions of the operating lease liabilities are reported in accrued liabilities and regulatory and other long-term liabilities, respectively, on the consolidated balance sheets. As of December 31, 2021 and 2020, the operating lease right-of-use assets were $43.4 million and $53.2 million, respectively, and operating lease liabilities were $44.4 million and $53.4 million, respectively, of which $8.3 million and $10.0 million, respectively, was classified as current. As of December 31, 2021 and 2020, the weighted average remaining lease terms were seven years and eight years, respectively, and the weighted average discount rates were 5.8% and 5.7%, respectively.

The following table summarizes undiscounted cash flows owed by the Company to lessors pursuant to noncancelable contractual agreements in effect as of December 31, 2021 and related imputed interest.

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	December 31, 2021
	(Thousands)
2022	$	10,404
2023	8,065
2024	6,190
2025	4,970
2026	5,040
Thereafter	20,652
Total	55,321
Less: imputed interest	10,911
Present value of operating lease liability	$	44,410

8.    Related Party Transactions

Related Party Transactions with EQT

As of December 31, 2021, EQT remained a related party to the Company due to its ownership of 22,796,026 shares of Equitrans Midstream common stock, which represented an approximately 5.3% ownership interest in the Company, excluding the impact of the Equitrans Midstream Preferred Shares. In the ordinary course of business, the Company engaged, and continues to engage, as applicable, in transactions with EQT and its affiliates, including, but not limited to, gathering agreements, transportation service and precedent agreements, storage agreements and water services agreements.

Related Party Transactions with EQM

ETRN EQM Omnibus Agreements. Pursuant to an omnibus agreement with EQM, the EQM General Partner (as successor to the former EQM general partner) and the Company (the ETRN Omnibus Agreement), the Company performed centralized corporate, general and administrative services for EQM. In exchange, EQM reimbursed the Company for the expenses incurred by the Company in providing these services. In connection with the entry by EQM and the Company into an Assignment and Bill of Sale on March 31, 2019, the ETRN Omnibus Agreement was amended and restated, to, among other things, govern the Company's use, and payment for such use, of the acquired assets following their conveyance to EQM under the Assignment and Bill of Sale. In connection with the EQM Merger, the ETRN Omnibus Agreement terminated at the Effective Time, subject to the survival of certain license rights and indemnification obligations. See Note 2.

Secondment Agreement. Pursuant to a secondment agreement, employees of the Company and its affiliates were, prior to the closing of the EQM Merger, seconded to EQM to provide operating and other services with respect to EQM's business under the direction, supervision and control of EQM. EQM reimbursed the Company and its affiliates for the services provided by the seconded employees. The expenses for which EQM reimbursed the Company and its affiliates were not necessarily reflective of the actual expenses that EQM would incur on a stand-alone basis. EQM is unable to estimate what those expenses would be on a stand-alone basis. In connection with the EQM Merger, the Company's secondment agreement with EQM terminated at the Effective Time. See Note 2.

Summary of Related Party Transactions

The following table summarizes the Company's related party transactions.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Operating revenues	$	777,276	$	964,220	$	1,122,626
Separation and other transaction costs	—		—		(1,440)
Equity income (a)	17,579		233,833		163,279
Interest income from the Preferred Interest	5,767		6,053		6,324
Capital contributions to the MVP Joint Venture (a)	(287,665)		(272,801)		(774,593)
Principal payments received on the Preferred Interest	5,217		5,003		4,661
Net distributions to EQT	—		—		(93,666)

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(a)Associated with the Company's ownership in the MVP Joint Venture. See Note 9 for further detail.

The following table summarizes the Company's related party receivables and payables.

	December 31,
	2021		2020
	(Thousands)
Accounts receivable	$	190,410	$	199,674
Contract asset	2,246		2,207
Investments in unconsolidated entity	1,239,039		2,796,316
Preferred Interest	99,838		105,056
Capital contributions payable to the MVP Joint Venture	72,188		10,723
Contract liability	818,658		398,750

9.    Investment in Unconsolidated Entity

The MVP Joint Venture is constructing the Mountain Valley Pipeline (MVP), an estimated 300-mile natural gas interstate pipeline that is designed to span from northern West Virginia to southern Virginia. The Company will operate the MVP and owned a 46.8% interest in the MVP project as of December 31, 2021. On November 4, 2019, Consolidated Edison, Inc. (Con Edison) exercised an option to cap its investment in the construction of the MVP project at approximately $530 million (excluding AFUDC). The Company and NextEra Energy, Inc. are obligated to, and RGC Resources, Inc., another member of the MVP Joint Venture owning an interest in the MVP project, has opted to, fund the shortfall in Con Edison's capital contributions, on a pro rata basis. Such funding by the Company and funding by other members has and will correspondingly increase the Company's and such other funding members' respective interests in the MVP project and decrease Con Edison's interest in the MVP project. As a result, depending on the project's total cost, the Company's equity ownership in the MVP project will progressively increase to a percentage in excess of approximately 46.8%. The MVP Joint Venture is a variable interest entity because it has insufficient equity to finance its activities during the construction stage of the project. The Company is not the primary beneficiary of the MVP Joint Venture because the Company does not have the power to direct the activities that most significantly affect the MVP Joint Venture's economic performance. Certain business decisions, such as decisions to make distributions of cash, require a greater than 66 2/3% ownership interest approval, and no one member owns more than a 66 2/3% interest.

In April 2018, the MVP Joint Venture announced the MVP Southgate project, which is a proposed 75-mile interstate pipeline that is contemplated to extend from the MVP at Pittsylvania County, Virginia to new delivery points in Rockingham and Alamance Counties, North Carolina. The Company is expected to operate the MVP Southgate pipeline and owned a 47.2% interest in the MVP Southgate project as of December 31, 2021. The MVP Joint Venture is evaluating the MVP Southgate project, including engaging in discussions with the project shipper, Dominion Energy North Carolina, regarding options with respect to the project, including potentially refining the project’s design and timing in lieu of pursuing the project as originally contemplated. Dominion Energy North Carolina’s obligations under the precedent agreement in support of the original project are subject to certain conditions, including that the MVP Joint Venture complete construction of the project facilities by June 1, 2022, which deadline is subject to extension by virtue of previously declared events of force majeure. The Company is unable to predict the results of the discussions between the MVP Joint Venture and Dominion Energy North Carolina, including any potential modifications to the project, or ultimate undertaking or completion of the project.

In November 2021, the MVP Joint Venture issued a capital call notice for the funding of the MVP project to MVP Holdco, LLC (MVP Holdco), a wholly owned subsidiary of the Company, for $72.0 million, of which $52.9 million and $19.1 million was paid in January 2022 and February 2022, respectively. The capital contributions payable and the corresponding increase to the investment balance are reflected on the consolidated balance sheet as of December 31, 2021.

Pursuant to the MVP Joint Venture's limited liability company agreement, MVP Holdco is obligated to provide performance assurances, which may take the form of a guarantee from EQM (provided that EQM's debt is rated as investment grade in accordance with the requirements of the MVP Joint Venture's limited liability company agreement), a letter of credit or cash collateral, in favor of the MVP Joint Venture to provide assurance as to the funding of MVP Holdco's proportionate share of the construction budget for the MVP project.

In addition, pursuant to the MVP Joint Venture's limited liability company agreement, MVP Holdco is obligated to provide performance assurances in respect of MVP Southgate, which performance assurances may take the form of a guarantee from EQM (provided that EQM's debt is rated as investment grade in accordance with the requirements of the MVP Joint Venture's limited liability company agreement), a letter of credit or cash collateral.

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Based on EQM's credit rating levels in the first quarter of 2020, EQM delivered replacement credit support to the MVP Joint Venture in the form of letters of credit in the amounts of approximately $220.2 million and $14.2 million with respect to the MVP and MVP Southgate projects, respectively. In connection with delivering such letters of credit as replacement performance assurances, EQM's performance guarantees associated with the MVP and MVP Southgate projects were terminated. As of December 31, 2021, the letter of credit with respect to the MVP project was in the amount of approximately $219.7 million. Upon the FERC’s initial release to begin construction of the MVP Southgate project, the Company’s current letter of credit to support MVP Southgate will be terminated, and the Company will be obligated to deliver a new letter of credit (or provide another allowable form of performance assurance) in an amount equal to 33% of MVP Holdco’s proportionate share of the remaining capital obligations for the MVP Southgate project under the applicable construction budget.

The following tables summarize the condensed consolidated financial statements of the MVP Joint Venture in relation to the MVP project.

Condensed Consolidated Balance Sheets

	December 31,
	2021		2020
	(Unaudited)
	(Thousands)
Current assets	$	148,820	$	146,054
Non-current assets	6,432,288		5,848,298
Total assets	$	6,581,108	$	5,994,352
Current liabilities	$	160,331	$	217,086
Equity	6,420,777		5,777,266
Total liabilities and equity	$	6,581,108	$	5,994,352

Condensed Statements of Consolidated Operations

	Years Ended December 31,
	2021		2020		2019
	(Unaudited)
	(Thousands)
Operating expenses	$	(399)	$	(360)	$	(2,416)
Other income	18		288		6,243
Net interest income	11,452		150,995		105,382
AFUDC – equity	26,722		352,323		245,890
Net income	$	37,793	$	503,246	$	355,099

The Company's ownership interest in the MVP Joint Venture related to the MVP project is significant for the years ended December 31, 2020 and 2019 as defined by the SEC’s Regulation S-X Rule 1-02(w). Accordingly, as required by Regulation S-X Rule 3-09, the Company has included audited financial statements of the MVP Joint Venture, with respect to the MVP project, as of December 31, 2020 and for the years ended December 31, 2020 and 2019 as Exhibit 99.1 to this Annual Report on Form 10-K.

10.    Share-based Compensation Plans

The Company maintains employee share-based compensation plans for restricted stock, restricted stock units, performance awards, stock options and other equity or cash-based awards as governed by the Equitrans Midstream Corporation 2018 Long-Term Incentive Plan, as amended (the 2018 Plan), which was effective as of November 12, 2018. Non-employee members of the Company's Board receive phantom units in connection with their board service payable in Company common stock upon the director's termination of services from the Board. The 2018 Plan's term is through the 2028 shareholders' meeting and the maximum number of shares of common stock that may be issued and as to which awards may be granted under the 2018 Plan is 38,592,386 shares.

In accordance with an Employee Matters Agreement by and between the Company and EQT entered into on November 12, 2018 in connection with the Separation (Employee Matters Agreement), previously outstanding share-based compensation

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awards granted under EQT's equity compensation programs prior to the Separation and held by certain executives and employees of the Company and EQT were adjusted to reflect the impact of the Separation on these awards. To preserve the aggregate intrinsic value of EQT awards held prior to the Separation, as measured immediately before and immediately after the Separation (excluding EQT option awards which were converted in accordance with the conversion provisions set forth in the Employee Matters Agreement), each holder of EQT share-based compensation awards generally received an adjusted award consisting of both a share-based compensation award denominated in EQT equity and a share-based compensation award denominated in Company equity. These awards were adjusted in accordance with the basket method, resulting in participants retaining one unit of the existing EQT incentive award while receiving an additional 0.8 units of a Company-based award and included awards that were share-settled and awards satisfied in cash, which were treated as liability awards. The Company recognizes share-based compensation expense related to unvested awards held by its employees, no matter which entity settles the obligation.

Changes in performance and the number of outstanding awards can impact the ultimate amount of the Company's performance awards to be settled. Share-based awards to be settled in Equitrans Midstream common stock upon settlement are funded by shares acquired by the Company in the open market or from any other person, stock issued directly by the Company or any combination of the foregoing. Share counts for share-based compensation discussed herein represent outstanding shares to be remitted by the Company to (i) its employees in connection with compensation programs adopted by the Company and (ii) employees of the Company and EQT (or, as applicable, former employees of the Company or EQT) pursuant to the Employee Matters Agreement.

The following table summarizes the components of share-based compensation expense for the years ended December 31, 2021, 2020 and 2019.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
2017 Incentive PSU Program	—		—		(893)
2018 Incentive PSU Program	—		698		(360)
2019 Equitrans Midstream PSU Program	984		4,935		—
2020 Equitrans Midstream PSU Program	1,297		2,317		—
2021 Equitrans Midstream PSU Program	5,940		—		—
2018 EQT Value Driver Performance Share Unit Award Program	—		—		637
Restricted stock awards	11,268		7,422		5,197
Other programs, including non-employee director awards	3,205		1,577		1,833
Total share-based compensation expense	$	22,694	$	16,949	$	6,414

The Company capitalizes compensation cost for its share-based compensation awards based on an employee's job function. Capitalized compensation costs for the years ended December 31, 2021, 2020 and 2019 were $4.2 million, $1.9 million and ($0.5) million, respectively. The Company recorded $2.0 million, $0.2 million, and $0.7 million for the years ended December 31, 2021, 2020 and 2019, respectively, of tax expense for excess tax benefits related to share-based compensation plans.

Performance Share Unit Programs – Equity & Liability

The Company assumed portions of the 2017 EQT Incentive Performance Share Unit Program (2017 Incentive PSU Program) and the 2018 EQT Incentive Performance Share Unit Program (2018 Incentive PSU Program) at the Separation Date.

The Management Development and Compensation Committee of the Company's Board (the Compensation Committee) adopted the Equitrans Midstream Corporation 2019 Performance Share Unit Program (the 2019 Equitrans Midstream PSU Program), the Equitrans Midstream Corporation 2020 Performance Share Unit Program (the 2020 Equitrans Midstream PSU Program) and the Equitrans Midstream Corporation 2021 Performance Share Unit Program (the 2021 Equitrans Midstream PSU Program).

The 2017 Incentive PSU Program, the 2018 Incentive PSU Program (collectively, the EQT Incentive PSU Programs), the 2019 Equitrans Midstream PSU Program, the 2020 Equitrans Midstream PSU Program and the 2021 Equitrans Midstream PSU Program (collectively, the Equitrans Midstream PSU Programs) are referred to herein as the Incentive PSU Programs. The Incentive PSU Programs vest in both equity and liability awards.

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The Company established the Equitrans Midstream PSU Programs to provide long-term incentive opportunities to key employees to further align their interests with those of the Company's shareholders and with the strategic objectives of the Company. The performance period for each of the awards under the Incentive PSU Programs, except for the 2020 Equitrans Midstream PSU Program, is 36 months, with vesting occurring upon payment following the expiration of the performance period, subject to continued service through such vesting date. The awards under the 2020 Equitrans Midstream PSU Program may be earned over four separate performance periods as follows: (i) 20% for each of the three calendar years that occur following the vesting commencement date (i.e., the 2020, 2021 and 2022 calendar years) and (ii) 40% for the cumulative three-year period following the vesting commencement date (i.e., January 1, 2020 through December 31, 2022), with vesting occurring upon payment following the expiration of the cumulative three-year performance period, subject to continued service through such vesting date.

The 2019 Equitrans Midstream PSU Program awards will be earned based on the level of Equitrans Midstream total shareholder return relative to a predefined peer group and the cumulative Equitrans Midstream total shareholder return.

The Equitrans Midstream PSU Program awards granted in 2020 and 2021 will be earned based on the level of Equitrans Midstream total shareholder return relative to a predefined peer group (with respect to the 2020 Equitrans Midstream PSU Program awards not to exceed 100% if the Company's total shareholder return is less than zero percent).

The payout factor for the Equitrans Midstream PSU Programs vary between zero and 200% of the number of outstanding units, each contingent on the applicable performance metrics. The Company recorded the portions of the Incentive PSU Programs to be settled in stock as equity awards using a grant date fair value determined through a Monte Carlo simulation, which projects the common stock price for EQT or the Company, as applicable, and their peers at the ending point of the applicable performance period. The Incentive PSU Programs also included awards to be settled in cash and, therefore, were recorded at fair value as of the measurement date determined through a Monte Carlo simulation, which projects the common stock price for EQT or the Company, as applicable, and their peers at the ending point of the applicable performance period. The expected share prices were generated using each company's annual volatility for the expected term and the commensurate three-year or two-year risk-free rates (each shown in the chart below) for equity awards and liability awards, respectively. The vesting of units under each Incentive PSU Program occurs upon payment following the expiration of the applicable performance period, subject to continued service through such date, and the satisfaction of the underlying performance or market condition.

The following table provides detailed information on each award:

Incentive PSU Program	Settled In	Accounting Treatment	Fair Value (a)		Vested/ Payment Date	Awards Paid	Value (Millions)		Unvested/ Expected Payment Date	Awards Outstanding as of December 31, 2021 (b)
2017	Stock	Equity	$	120.60	February 2020	66,822	$	8.1	N/A	N/A
2017	Cash	Liability	$	13.36	February 2020	146,387	2.0		N/A	N/A
2018	Stock	Equity	$	76.53	February 2021	40,349	3.1		N/A	N/A
2018T1	Cash	Liability	$	8.04	February 2021	40,769	0.3		N/A	N/A
2018T2	Cash	Liability	$	—	February 2021	—	—		N/A	N/A
2019	Stock	Equity	$	15.03	N/A	N/A	N/A		First Quarter of 2022	474,488
2019	Cash	Liability	$	—	N/A	N/A	N/A		First Quarter of 2022	209,525
2020	Stock	Equity	$	5.59	N/A	N/A	N/A		First Quarter of 2023	703,583
2020	Cash	Liability	$	7.19	N/A	N/A	N/A		First Quarter of 2023	406,050
2021	Stock	Equity	$	8.77	N/A	N/A	N/A		First Quarter of 2024	1,481,126
2021	Cash	Liability	$	13.73	N/A	N/A	N/A		First Quarter of 2024	856,190

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(a)Grant date fair value was determined using a Monte Carlo simulation for equity awards. For unvested liability awards, the fair value was determined using a Monte Carlo simulation as of the measurement date. For vested liability awards, the fair value is equal to the Company’s stock price at the end of the performance period.

(b)Represents the number of outstanding units as of December 31, 2021, adjusted for forfeitures, to be settled in stock or cash.

Fair value is estimated using a Monte Carlo simulation valuation method with the following weighted average assumptions:

	For Incentive PSU Programs Issued During the Years Ended December 31,
	2021				2020				2019
Accounting Treatment	Liability (a)		Equity		Liability (a)		Equity			Equity
Risk-free rate	0.67	%	0.16	%	0.28	%	0.39	%		2.54	%
Dividend yield	N/A		N/A		N/A		N/A			N/A
Volatility factor	61.0	%	61.0	%	42.0	%	53.0	%		30.0	%
Expected term	2 years		3 years		1 year		3 years			3 years

(a)Information shown for the valuation of the liability plan is as of the measurement date.

Restricted Stock Awards – Equity

The Company granted 660,250, 491,640 and 344,796 restricted stock equity awards during the years ended December 31, 2021, 2020 and 2019, respectively, to key employees of the Company. The restricted stock granted will be fully vested at the end of the three-year period commencing with the vesting commencement date, assuming continued service through such date.

As of December 31, 2021, $5.5 million of unrecognized compensation cost related to non-vested restricted stock equity awards was expected to be recognized over a remaining weighted average vesting term of approximately 1.24 years.

A summary of restricted stock equity award activity during the year ended December 31, 2021 is presented below.

	Non-vested Shares (a)	Weighted Average Fair Value		Aggregate Grant Date Fair Value
Outstanding at January 1, 2021	841,068	$	17.08	$	14,366,346
Granted	660,250	8.04		5,308,410
Vested	(58,185)	44.20		(2,572,026)
Forfeited	(49,732)	11.17		(555,522)
Outstanding at December 31, 2021	1,393,401	$	11.88	$	16,547,208

(a)Non-vested shares outstanding at December 31, 2021 will be settled by the Company once vested, assuming continued service through such date.

Restricted Stock Unit Awards – Liability

The Company granted 430,800, 455,619, and 271,233 restricted stock liability awards during the years ended December 31, 2021, 2020 and 2019, respectively, to key employees of the Company. The restricted stock units granted will be fully vested at the end of the three-year period commencing with the vesting commencement date, assuming continued service through such date. The total liability recorded for these restricted units was $7.9 million and $4.5 million as of December 31, 2021 and 2020, respectively.

A summary of restricted stock unit liability award activity during the year ended December 31, 2021 is presented below.

	Non-vested Shares (a)	Weighted Average Fair Value		Aggregate Grant Date Fair Value
Outstanding at January 1, 2021	877,596	$	15.46	$	13,565,895
Granted	430,800	8.06		3,472,652
Vested	(190,036)	20.76		(3,944,942)
Forfeited	(38,656)	10.73		(414,837)
Outstanding at December 31, 2021	1,079,704	$	11.74	$	12,678,768

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(a)Non-vested shares outstanding at December 31, 2021 will be settled by the Company once vested, assuming continued service through such date.

Value Driver Performance Share Unit Award Programs

Under the 2018 EQT Value Driver Performance Share Unit Award Program (the 2018 EQT VDA), 50% of the awards confirmed vested upon payment following the first anniversary of the grant date, and the remaining 50% of the awards confirmed vested upon payment following the second anniversary of the grant date subject to continued service through such dates.

The following table provides detailed information on the 2018 EQT VDA award:

EQT VDA Program	Settled In	Accounting Treatment	Fair Value per Unit (a)		Vested/ Payment Date	Cash Paid (Millions)		Unvested/ Expected Payment Date	Awards Outstanding as of December 31, 2021
2018	Cash	Liability	$	20.02	February 2019	$	4.1	N/A	N/A
2018	Cash	Liability	$	13.36	February 2020	$	2.3	N/A	N/A

(a)The fair value per unit is based on the Company's common stock price on the measurement date.

Non-Qualified Stock Options

In connection with the Separation, the Company assumed stock options related to EQT share-based compensation awards. Stock options outstanding and exercisable as of December 31, 2021 were 464,876, have a weighted average exercise price of $38.55 and expire between 2022 and 2028. There was no stock option activity during the years ended December 31, 2021, 2020 and 2019. There were no unrecognized compensation costs related to outstanding non-vested stock options as of December 31, 2021.

Phantom Units

The Company grants phantom unit awards to certain non-employee directors that serve or at the time of grant served on the Board. Director phantom units expected to be satisfied in Company common stock vest on the date of grant and are recorded based on the grant date fair value, which is determined based upon the closing price of the Company’s common stock on the trading day before the grant date. The value of director phantom units is paid in Company common stock upon the director's termination of service on the Board. Prior to the completion of the EQGP Buyout and the EQM Merger, respectively, EQGP's general partner and EQM's general partner, as applicable, granted phantom unit awards to certain non-employee directors of EQGP's general partner and EQM's general partner, respectively. A total of 512,440 Equitrans Midstream non-employee director share-based awards including accrued dividends were outstanding as of December 31, 2021.

A summary of phantom units' activity for the years ended December 31, 2021, 2020 and 2019 is presented below.

	Years Ended December 31,
	2021					2020					2019
	Grants	Weighted Average Fair Value		Compensation Expense (Millions)		Grants	Weighted Average Fair Value		Compensation Expense (Millions)		Grants	Weighted Average Fair Value		Compensation Expense (Millions)
Equitrans Midstream phantom units	149,280	$	8.04	$	1.2	92,760	$	11.51	$	1.1	45,000	$	20.02	$	0.9
EQGP phantom units (a)	—	$	—	$	—	—	$	—	$	—	8,500	$	20.00	$	0.2
EQM phantom units(b)	—	$	—	$	—	9,540	$	29.91	$	0.3	5,910	$	43.25	$	0.3

(a)In connection with the completion of the EQGP Buyout, the non-employee directors of EQGP's general partner were paid the Purchase Price for each EQGP phantom unit that they held. See Note 2.

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(b)In connection with the closing of the EQM Merger, the non-employee directors of the EQM General Partner received the Merger Consideration for each EQM phantom unit that they held. See Note 2.

2022 Awards

Effective in January 2022, the Compensation Committee adopted the Equitrans Midstream Corporation 2022 Performance Share Unit Program (2022 PSU Program) under the 2018 Plan. The 2022 PSU Program was established to align the interests of key employees with the interests of shareholders and the strategic objectives of the Company.

In January 2022, 1,997,750 units were granted under the 2022 PSU Program. The vesting of the units under the 2022 PSU Program will occur upon payment after the expiration of the Performance Period, which is January 1, 2022 to December 31, 2024, assuming continued employment with the Company. The payout will vary between zero and 200% of the number of outstanding units contingent upon the level of total shareholder return relative to a predefined peer group during the Performance Period. If earned at the target payout level of 100%, 1,274,910 of the 2022 PSU Program units are expected to be distributed in Company common stock and 722,840 of the 2022 PSU Program units are expected to be paid in cash.

In January 2022, 546,520 restricted stock equity and 310,320 restricted stock unit liability awards were granted. The restricted stock equity awards and restricted stock unit liability awards will be fully vested at the end of the three-year period commencing on January 1, 2022, assuming continued employment with the Company.

Employee Savings Plan

For the years ended December 31, 2021, 2020 and 2019, the Company recognized expense related to its defined contribution plan of $7.6 million, $8.1 million and $7.8 million, respectively.

11.    Debt

The following table presents the Company's and its consolidated subsidiaries' outstanding debt as of December 31, 2021 and 2020.

	December 31, 2021						December 31, 2020
	Principal		Carrying Value(a)		Fair Value(b)		Principal		Carrying Value(a)		Fair Value(b)
	(Thousands)
Amended EQM Credit Facility	$	225,000	$	225,000	$	225,000	$	485,000	$	485,000	$	485,000
Eureka Credit Facility (c)	280,000		280,000		280,000		302,500		302,500		302,500
Total credit facility borrowings	$	505,000	$	505,000	$	505,000	$	787,500	$	787,500	$	787,500
Amended 2019 EQM Term Loan Agreement	—		—		—		1,400,000		1,397,768		1,400,000
EQM 4.00% Senior Notes due 2024	500,000		498,014		522,695		500,000		497,245		515,455
EQM 4.125% Senior Notes due 2026	500,000		495,816		517,695		500,000		494,966		512,285
EQM 4.50% Senior Notes due 2029	800,000		790,927		834,856		—		—		—
EQM 4.75% Senior Notes due 2023	600,000		598,088		628,380		1,100,000		1,094,235		1,162,590
EQM 4.75% Senior Notes due 2031	1,100,000		1,087,493		1,166,220		—		—		—
EQM 5.50% Senior Notes due 2028	850,000		842,657		939,684		850,000		841,538		933,980
EQM 6.50% Senior Notes due 2048	550,000		539,778		673,458		550,000		539,393		582,995
EQM 6.00% Senior Notes due 2025	700,000		692,662		763,091		700,000		690,565		767,375
EQM 6.50% Senior Notes due 2027	900,000		889,510		1,014,417		900,000		887,602		1,020,060
Total long-term debt	$	6,500,000	$	6,434,945	$	7,060,496	$	6,500,000	$	6,443,312	$	6,894,740

(a)Carrying values of the senior notes and term loans represent principal amount less unamortized debt issuance costs and debt discounts.

(b)See Note 12 for a discussion of fair value measurements.

(c)Includes aggregate borrowings outstanding on the 2021 Eureka Credit Facility (as defined below) as of December 31, 2021 and on the Former Eureka Credit Facility (as defined below) as of December 30, 2020.

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As of December 31, 2021, the combined aggregate amounts of maturities for long-term debt were as follows: zero in 2022, $0.6 billion in 2023, $0.5 billion in 2024, $0.7 billion in 2025, $0.5 billion in 2026 and $4.2 billion in 2027 and thereafter.

Equitrans Midstream Term Loan Facility. In December 2018, Equitrans Midstream entered into a term loan credit agreement (as amended in May 2019, the ETRN Term Loan Credit Agreement) that provided for a senior secured term loan facility in an aggregate principal amount of $600 million (the ETRN Term Loans). The Company received net proceeds from the ETRN Term Loans of $568.1 million, inclusive of a discount of $18.0 million and estimated debt issuance costs of $13.9 million. The net proceeds were primarily used to fund the EQGP Buyout, including certain fees, costs and expenses in connection therewith, and the remainder was used for general corporate purposes. On March 3, 2020, EQM drew $650.0 million under the EQM Credit Facility (defined below) and transferred such funds to the Company, pursuant to a senior unsecured term loan agreement with the Company. The Company utilized a portion of such funds to pay off all of the amounts outstanding under the ETRN Term Loans and the ETRN Term Loan Credit Agreement was terminated. As a result, the Company wrote off $24.4 million of unamortized discount and financing costs related to the ETRN Term Loan Credit Agreement. The write off charge is included in the loss on early extinguishment of debt line on the statements of consolidated comprehensive income. On September 29, 2020, the Company made a prepayment to EQM of all principal, interest, fees and other obligations outstanding under the senior unsecured term loan agreement and terminated the agreement. During the period from January 1, 2020 to March 3, 2020, the weighted average annual interest rate was approximately 6.2%. For the year ended December 31, 2019, the weighted average annual interest rate was approximately 6.8%.

Equitrans Midstream Credit Facility. In October 2018, Equitrans Midstream entered into a senior secured revolving credit facility agreement that provided for $100 million in borrowing capacity (the Equitrans Midstream Credit Facility). Equitrans Midstream amended the Equitrans Midstream Credit Facility on December 31, 2018 to, among other things, permit the incurrence of the borrowings under the ETRN Term Loan Credit Agreement. The Equitrans Midstream Credit Facility, which was available for general corporate purposes and to fund ongoing working capital requirements, was terminated on March 3, 2020 in conjunction with the Company's termination of the ETRN Term Loan Credit Agreement (see above). As a result, the Company wrote off $0.5 million of unamortized financing costs related to the Equitrans Midstream Credit Facility. The write off charge is included in the loss on early extinguishment of debt line on the statements of consolidated comprehensive income.

The Company had no borrowings and no letters of credit outstanding under the Equitrans Midstream Credit Facility during the period from January 1, 2020 to March 3, 2020. During the year ended December 31, 2019, the maximum outstanding borrowings under the Equitrans Midstream Credit Facility was $44 million, the average daily balance was approximately $3.2 million and the weighted average annual interest rate was 4.2%. Commitment fees paid to maintain credit availability under the Equitrans Midstream Credit Facility were approximately $0.1 million for the period from January 1, 2020 to March 3, 2020, and $0.5 million for the year ended December 31, 2019.

EQM Revolving Credit Facility. On October 31, 2018, EQM amended and restated its unsecured revolving credit facility to increase the borrowing capacity from $1 billion to $3 billion and extend the term to October 2023 (the EQM Credit Facility). On March 30, 2020, EQM entered into an amendment (the First Amendment) to the EQM Credit Facility (as amended, the First Amended EQM Credit Facility) which, among other things, amended certain defined terms and negative covenants in the EQM Credit Facility. On April 16, 2021, EQM entered into a second amendment (the Second Amendment) to the EQM Credit Facility (as amended by the First Amendment and the Second Amendment, the Amended EQM Credit Facility). The Second Amendment amended, among other things:

•certain defined terms, including:

•the definition of “Applicable Rate” in the First Amended EQM Credit Facility such that: (i) Base Rate Loans (as defined in the Amended EQM Credit Facility) bear interest at a base rate plus a margin of 0.125% to 2.000% determined on the basis of EQM’s then-current credit ratings and (ii) Eurodollar Rate Loans (as defined in the Amended EQM Credit Facility) bear interest at a Eurodollar Rate (as defined in the Amended EQM Credit Facility) plus a margin of 1.125% to 3.000% also determined on the basis of EQM’s then-current credit ratings; and

•the definition of “Qualified Project” in the First Amended EQM Credit Facility and certain related definitions, which, collectively, have the effect of removing the designation of the MVP project and the Hammerhead pipeline as Qualified Projects on a go-forward basis after March 31, 2021 under the Amended EQM Credit Facility, and eliminating certain addbacks to Consolidated EBITDA (as defined in the Amended EQM Credit Facility) that previously were available in connection with the MVP project and the Hammerhead pipeline; and

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•the financial covenant under the First Amended EQM Credit Facility, pursuant to which, except for certain measurement periods following the consummation of certain acquisitions during which the Consolidated Leverage Ratio (as defined in the Amended EQM Credit Facility) cannot exceed the greater of 5.50 to 1.00 or the maximum ratio otherwise permitted under the Amended EQM Credit Facility for the applicable period, the Consolidated Leverage Ratio cannot exceed, (i) for each fiscal quarter ending on and after June 30, 2021 and on or prior to September 30, 2022, 5.95 to 1.00, (ii) for the fiscal quarter ending on December 31, 2022, 5.25 to 1.00, and (iii) for each fiscal quarter ending after December 31, 2022, 5.00 to 1.00.

The Second Amendment also reduced the aggregate commitments available under the Amended EQM Credit Facility to $2.25 billion, and the commitment of each lender thereunder was reduced accordingly on a pro rata basis.

The Amended EQM Credit Facility is available for general partnership purposes, including to purchase assets, to make investments, to fund working capital requirements and capital expenditures and to pay distributions. Subject to satisfaction of certain conditions, the Amended EQM Credit Facility has an accordion feature that allows EQM to increase the available borrowings under the facility by up to an additional $750 million. The Amended EQM Credit Facility has a sublimit of up to $250 million for same-day swing line advances and a sublimit of up to $400 million for letters of credit. In addition, EQM has the ability to request that one or more lenders make available term loans under the Amended EQM Credit Facility subject to the satisfaction of certain conditions (which term loans would be secured by cash, qualifying investment grade securities or a combination thereof). The Company’s obligations in respect of the revolving borrowings made under the Amended EQM Credit Facility are unsecured. As of December 31, 2021, no term loans were outstanding under the Amended EQM Credit Facility.

As of December 31, 2021, EQM had approximately $225 million of borrowings and $234.9 million of letters of credit outstanding under the Amended EQM Credit Facility. As of December 31, 2020, EQM had approximately $485 million of borrowings and $246 million of letters of credit outstanding under the First Amended EQM Credit Facility. During the years ended December 31, 2021, 2020 and 2019, the maximum outstanding borrowings were $525 million, $2,040 million and $1,690 million, respectively; the average daily balances were approximately $395 million, $852 million and $846 million, respectively; and the weighted average annual interest rates were approximately 2.6%, 2.9% and 3.6%, respectively. For the years ended December 31, 2021, 2020 and 2019, commitment fees of $7.4 million, $7.2 million and $4.6 million, respectively, were paid to maintain credit availability under the Amended EQM Credit Facility.

Amended 2019 EQM Term Loan Agreement. In August 2019, EQM entered into a term loan agreement (the 2019 EQM Term Loan Agreement) that provided for unsecured term loans (the EQM Term Loans) in an aggregate principal amount of $1.4 billion. On March 30, 2020, EQM entered into an amendment to the 2019 EQM Term Loan Agreement (as amended, the Amended 2019 EQM Term Loan Agreement) which, among other things, amended certain defined terms and negative covenants in the 2019 EQM Term Loan Agreement.

On January 8, 2021, EQM (i) applied a portion of the proceeds from the issuance of the 2021 Senior Notes (as defined below) to prepay all principal, interest, fees and other obligations outstanding under the Amended 2019 EQM Term Loan Agreement and (ii) terminated the Amended 2019 EQM Term Loan Agreement and the loan documents associated therewith. EQM repaid outstanding loans with a principal amount of $1.4 billion in connection with the termination of the Amended 2019 EQM Term Loan Agreement. Prior to its termination in January 2021, the Amended 2019 EQM Term Loan Agreement would have matured in August 2022.

The Amended 2019 EQM Term Loan Agreement provided EQM with the right to request incremental term loans in an aggregate amount of up to $300 million, subject to, among other things, obtaining additional commitments from existing lenders or commitments from new lenders. As of December 31, 2020, EQM had $1.4 billion of borrowings outstanding under the Amended 2019 EQM Term Loan Agreement. During the period from January 1, 2021 through January 7, 2021, the weighted average annual interest rate was approximately 2.4%. During the year ended December 30, 2020 and for the applicable portions of the year ended December 31, 2019, the weighted average annual interest rates were approximately 2.7% and 3.3%, respectively.

Eureka Credit Facilities. On May 13, 2021, Eureka Midstream, LLC (Eureka), a wholly owned subsidiary of Eureka Midstream, repaid all outstanding principal borrowings plus accrued and unpaid interest under and terminated its credit facility with ABN AMRO Capital USA LLC, as administrative agent, the lenders party thereto from time to time and any other persons party thereto from time to time (the Former Eureka Credit Facility). No early termination or prepayment penalties were incurred as a result of the termination of the Former Eureka Credit Facility or the repayment of outstanding amounts under the facility. In connection with the termination of the Former Eureka Credit Facility, all guaranties and liens securing the obligations under the Former Eureka Credit Facility were terminated and released. Prior to its termination, the Former Eureka Credit Facility was scheduled to mature on August 25, 2021.

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In conjunction with the termination of, and to fund the repayment of all outstanding amounts under the Former Eureka Credit Facility, on May 13, 2021, Eureka entered into a $400 million senior secured revolving credit facility with Sumitomo Mitsui Banking Corporation, as administrative agent, the lenders party thereto from time to time and any other persons party thereto from time to time (the 2021 Eureka Credit Facility). The 2021 Eureka Credit Facility matures on November 13, 2024, and is available for general business purposes, including financing maintenance and expansion capital expenditures related to the Eureka system and providing working capital for Eureka’s operations. Subject to the satisfaction of certain conditions, the 2021 Eureka Credit Facility has an accordion feature that allows Eureka to increase the available borrowings under the facility to an amount no greater than $500 million of total commitments. The 2021 Eureka Credit Facility also has a sublimit of up to $20 million for same-day swing line advances.

Under the terms of the 2021 Eureka Credit Facility, Eureka can obtain base rate loans or Eurodollar rate loans. Base rate loans are denominated in dollars and bear interest at an adjusted base rate, which is equal to the highest of (i) the prime rate as quoted by the Wall Street Journal, (ii) the one-month Adjusted Eurodollar Rate (as defined in the 2021 Eureka Credit Facility) plus 1.0% or (iii) the Federal Funds effective rate plus 0.5% per annum; plus the Applicable Margin (as defined in the 2021 Eureka Credit Facility). Eurodollar rate loans bear interest at the Adjusted Eurodollar Rate per annum, which rate is to be determined by the administrative agent pursuant to a prescribed calculation based on the ICE Benchmark Administration LIBOR Rate for committed loans, and the 30-day rate of interest per annum appearing in Bloomberg Page BBAM1 as the London interbank offered rate for deposits in dollars for swing line advances, plus the Applicable Margin. The Applicable Margin ranges from 1.00% to 2.25% in the case of base rate loans and from 2.00% to 3.25% in the case of Eurodollar rate loans, in each case, depending on Eureka's consolidated leverage ratio.

The 2021 Eureka Credit Facility contains negative covenants that, among other things, limit restricted payments, the incurrence of debt, dispositions, mergers and fundamental changes, securities issuances and transactions with affiliates, in each case and as applicable, subject to certain specified exceptions. In addition, the 2021 Eureka Credit Facility contains certain specified events of default such as insolvency, nonpayment of scheduled principal or interest obligations, loss and failure to replace certain material contracts, change of control and cross-default related to the acceleration or default of certain other financial obligations.

Under the 2021 Eureka Credit Facility, Eureka is required to maintain a Consolidated Leverage Ratio (as defined in the 2021 Eureka Credit Facility) of not more than 4.75 to 1.00 (or not more than 5.25 to 1.00 for certain measurement periods following the consummation of certain acquisitions), tested as of the end of each fiscal quarter. If Eureka has issued senior notes of $200 million or more in the aggregate as of the end of any fiscal quarter, then for such fiscal quarter and for each fiscal quarter thereafter, Eureka is required to maintain a Consolidated Leverage Ratio of not more than 5.25 to 1.00 and will not permit the ratio of senior indebtedness to four-quarter Consolidated EBITDA (as defined in the 2021 Eureka Credit Facility) as of the end of any such quarter to exceed 3.50 to 1.00. Additionally, as of the end of any fiscal quarter, Eureka will not permit the ratio of Consolidated EBITDA for the four fiscal quarters then ending to Consolidated Interest Charges (as defined in the 2021 Eureka Credit Facility) to be less than 2.50 to 1.00. Notwithstanding anything to the contrary, the 2021 Eureka Credit Facility provides Eureka with an equity cure right if it fails to abide by such financial covenants.

As of December 31, 2021, Eureka had approximately $280 million of borrowings outstanding under the 2021 Eureka Credit Facility. As of December 31, 2020, Eureka had approximately $303 million of borrowings under the Former Eureka Credit Facility. During the year ended December 31, 2021, the maximum amount of outstanding borrowings under either of the Eureka credit facilities at any time was $315 million, the average daily balance was approximately $301 million and Eureka incurred interest at weighted average annual interest rate of approximately 2.5%. For the year ended December 31, 2021, commitment fees of $0.5 million were paid to maintain credit availability under the Eureka credit facilities. During the year ended December 31, 2020, and for the period from April 10, 2019 through December 31, 2019, the maximum amount of outstanding borrowings under the Former Eureka Credit Facility at any time were approximately $323 million and $293 million, respectively, the average daily balances were approximately $301 million and $288 million, respectively, and Eureka incurred interest at weighted average annual interest rates of approximately 2.6% and 4.2%, respectively. For the year ended December 31, 2020 and for the period from April 10, 2019 through December 31, 2019, commitment fees of $0.6 million and $0.4 million were paid to maintain credit availability under the Former Eureka Credit Facility, respectively.

2021 Senior Notes. During the first quarter of 2021, EQM issued, in a private offering, $800 million aggregate principal amount of new 4.50% senior notes due 2029 (the 2029 Notes) and $1,100 million aggregate principal amount of new 4.75% senior notes due 2031 (the 2031 Notes and, together with the 2029 Notes, the 2021 Senior Notes) and received net proceeds from the offering of approximately $1,876.5 million (excluding costs related to the Tender Offers discussed below), inclusive of a discount of $19 million and debt issuance costs of $4.5 million. EQM used the net proceeds from the offering of the 2021 Senior Notes and cash on hand to repay all outstanding borrowings under the Amended 2019 EQM Term Loan Agreement, to purchase an aggregate principal amount of $500 million of its outstanding 4.75% notes due 2023 (2023 Notes) pursuant to tender offers for certain of EQM's outstanding indebtedness (such tender offers, the Tender Offers), and for general partnership purposes.

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The 2021 Senior Notes were issued under and are governed by an indenture, dated January 8, 2021 (the 2021 Indenture), between EQM and The Bank of New York Mellon Trust Company, N.A., as trustee. The 2021 Indenture contains covenants that limit EQM’s ability to, among other things, incur certain liens securing indebtedness, engage in certain sale and leaseback transactions, and enter into certain consolidations, mergers, conveyances, transfers or leases of all or substantially all of EQM’s assets. The 2029 Notes will mature on January 15, 2029 and interest on the 2029 Notes is payable semi-annually on January 15 and July 15 of each year, commencing July 15, 2021. The 2031 Notes will mature on January 15, 2031 and interest on the 2031 Notes is payable semi-annually on January 15 and July 15 of each year, commencing July 15, 2021.

The 2021 Senior Notes are unsecured and rank equally with all of EQM’s existing and future senior obligations. The 2021 Senior Notes are senior in right of payment to any of EQM’s future obligations that are, by their terms, expressly subordinated in right of payment to the 2021 Senior Notes. The 2021 Senior Notes are effectively subordinated to EQM’s secured obligations, if any, to the extent of the value of the collateral securing such obligations, and structurally subordinated to all indebtedness and obligations, including trade payables, of EQM’s subsidiaries, other than any subsidiaries that may guarantee the 2021 Senior Notes in the future. EQM may, at its option, redeem some or all of the 2029 Notes and the 2031 Notes, in whole or in part, at any time prior to their maturity at the applicable redemption price as set forth in the 2021 Indenture.

Upon the occurrence of a Change of Control Triggering Event (as defined in the 2021 Indenture), EQM may be required to offer to purchase the 2021 Senior Notes at a purchase price equal to 101% of the aggregate principal amount of the 2021 Senior Notes repurchased, plus accrued and unpaid interest, if any, to, but excluding, the repurchase date.

The 2021 Indenture contains certain events of default, including the following: (i) default in the payment of interest on such 2021 Senior Notes when due that continues for 30 days; (ii) default in the payment of principal of or premium, if any, on any such 2021 Senior Notes when due, whether at its stated maturity, upon redemption or otherwise; (iii) failure by EQM or any subsidiary guarantor, if any, to comply for 90 days with the other agreements with respect to such 2021 Senior Notes contained in the 2021 Indenture after written notice by the trustee or by the holders of at least 25% in principal amount of the outstanding 2021 Senior Notes of such series; (iv) certain events of bankruptcy, insolvency or reorganization of EQM or any subsidiary guarantor, if any, that is one of EQM’s Significant Subsidiaries (as defined in the 2021 Indenture); and (v) if such 2021 Senior Notes are guaranteed by a subsidiary guarantor that is one of EQM’s Significant Subsidiaries, (a) the guarantee of that subsidiary guarantor ceases to be in full force and effect, except as otherwise provided in the 2021 Indenture; (b) the guarantee of that subsidiary guarantor is declared null and void in a judicial proceeding; or (c) that subsidiary guarantor denies or disaffirms its obligations under the 2021 Indenture or its guarantee.

If an event of default occurs and is continuing with respect to any of the 2021 Senior Notes, the trustee or the holders of at least 25% in aggregate principal amount of the then outstanding 2021 Senior Notes of such series may declare the 2021 Senior Notes of such series to be due and payable. Upon such a declaration, such principal, premium, if any, and accrued and unpaid interest on such 2021 Senior Notes will be due and payable immediately. If an event of default relating to certain events of bankruptcy, insolvency or reorganization occurs, all outstanding 2021 Senior Notes will become due and payable immediately without further action or notice on the part of the trustee or any holders of the 2021 Senior Notes.

Tender Offers. On January 15, 2021 (the early tender deadline), the maximum principal amount for the Tender Offers was fully subscribed by the 2023 Notes tendered as of the early tender deadline and on January 20, 2021, EQM purchased an aggregate principal amount of $500 million of 2023 Notes at an aggregate cost of approximately $537 million (inclusive of the applicable early tender premium for the 2023 Notes described in that certain Offer to Purchase of EQM dated January 4, 2021, as amended, plus accrued interest).

The Company incurred a loss on the extinguishment of debt of $41.0 million during the first quarter of 2021 related to the payment of the Tender Offer premium and write off of unamortized discounts and financing costs related to the prepayment of the EQM Term Loans under, and termination of, the Amended 2019 EQM Term Loan Agreement and purchase of 2023 Notes in the Tender Offers. This amount is included in the loss on extinguishment of debt line on the statements of consolidated comprehensive income.

2020 Senior Notes. During the second quarter of 2020, EQM issued $700 million aggregate principal amount of new 6.00% senior unsecured notes due July 1, 2025 and $900 million aggregate principal amount of new 6.50% senior unsecured notes due July 1, 2027 (collectively, the 2020 Senior Notes) and received net proceeds from the offering of approximately $1,576.1 million, inclusive of a discount of $20.0 million and debt issuance costs of $3.9 million. A portion of the net proceeds were used to repay a portion of the borrowings outstanding under the First Amended EQM Credit Facility, and the remainder was used for general partnership purposes.

The 2020 Senior Notes were issued under and are governed by an indenture, dated June 18, 2020 (the 2020 Indenture), between EQM and The Bank of New York Mellon Trust Company, N.A., as trustee. The 2020 Indenture contains covenants that limit EQM's ability to, among other things, incur certain liens securing indebtedness, engage in certain sale and leaseback

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transactions, and enter into certain consolidations, mergers, conveyances, transfers or leases of all or substantially all of EQM's assets. Upon the occurrence of a Change of Control Triggering Event (as defined in the 2020 Indenture), EQM may be required to offer to purchase the 2020 Senior Notes at a purchase price equal to 101% of the aggregate principal amount of the 2020 Senior Notes repurchased, plus accrued and unpaid interest, if any, to, but excluding, the repurchase date.

The 2020 Senior Notes are unsecured and rank equally with all of EQM’s existing and future senior obligations. The 2020 Senior Notes are senior in right of payment to any of EQM’s future obligations that are, by their terms, expressly subordinated in right of payment to the 2020 Senior Notes. The 2020 Senior Notes are effectively subordinated to EQM’s secured obligations, if any, to the extent of the value of the collateral securing such obligations, and structurally subordinated to all indebtedness and obligations, including trade payables, of EQM’s subsidiaries, other than any subsidiaries that may guarantee the 2020 Senior Notes in the future.

The 2020 Indenture contains certain events of default, including the following: (1) default in the payment of interest on such 2020 Senior Notes when due that continues for 30 days; (2) default in the payment of principal of or premium, if any, on any such 2020 Senior Notes when due, whether at its stated maturity, upon redemption or otherwise; (3) failure by EQM or any subsidiary guarantor, if any, to comply for 90 days with the other agreements with respect to such 2020 Senior Notes contained in the 2020 Indenture after written notice by the trustee or by the holders of at least 25% in principal amount of the outstanding 2020 Senior Notes of such series; (4) certain events of bankruptcy, insolvency or reorganization of EQM or any subsidiary guarantor, if any, that is one of EQM’s Significant Subsidiaries (as defined in the 2020 Indenture); and (5) if such 2020 Senior Notes are guaranteed by a subsidiary guarantor that is one of EQM’s Significant Subsidiaries, (a) the guarantee of that subsidiary guarantor ceases to be in full force and effect, except as otherwise provided in the 2020 Indenture; (b) the guarantee of that subsidiary guarantor is declared null and void in a judicial proceeding; or (c) that subsidiary guarantor denies or disaffirms its obligations under the 2020 Indenture or its guarantee.

If an event of default occurs and is continuing with respect to any of the 2020 Senior Notes, the trustee or the holders of at least 25% in aggregate principal amount of the then outstanding 2020 Senior Notes of such series may declare the 2020 Senior Notes of such series to be due and payable. Upon such a declaration, such principal, premium, if any, and accrued and unpaid interest on such 2020 Senior Notes will be due and payable immediately. If an event of default relating to certain events of bankruptcy, insolvency or reorganization occurs, all outstanding 2020 Senior Notes will become due and payable immediately without further action or notice on the part of the trustee or any holders of the 2020 Senior Notes.

As of December 31, 2021, EQM and Eureka were in compliance with all debt provisions and covenants.

12.    Fair Value Measurements

Assets Measured at Fair Value on a Recurring Basis. The Company records derivative instruments at fair value on a gross basis in its consolidated balance sheets. The Henry Hub cash bonus payment provision, as described in Note 6, is recorded at its estimated fair value using a Monte Carlo simulation model. Significant inputs used in the fair value measurement include NYMEX Henry Hub natural gas futures prices as of the date of valuation, assumptions regarding in-service timing for the MVP, risk-free interest rates based on U.S. Treasury rates, expected volatility of NYMEX Henry Hub natural gas futures prices and an estimated credit spread of EQT. The expected volatility of NYMEX Henry Hub natural gas futures prices used in the valuation methodology represents a significant unobservable input causing the Henry Hub cash bonus payment provision to be designated as a Level 3 fair value measurement. An expected average volatility of approximately 39% was utilized in the valuation model, which is based on market-quoted volatilities of relevant NYMEX Henry Hub natural gas forward prices. As of December 31, 2021 and 2020, the fair values of the Henry Hub cash bonus payment provision were $51.6 million and $68.0 million, respectively, which were recorded in other assets on the Company's consolidated balance sheets. During the years ended December 31, 2021 and 2020, the Company recognized a loss of $16.4 million and a gain of $16.5 million, respectively, representing the change in estimated fair value of the derivative instrument during the respective period. The (loss) gain is reflected in other (expense) income, net, in the Company's statements of consolidated comprehensive income.

Other Financial Instruments. The carrying values of cash and cash equivalents, accounts receivable, amounts due to/from related parties and accounts payable approximate fair value due to the short maturity of the instruments; as such, their fair values are Level 1 fair value measurements. The carrying values of borrowings under the Amended EQM Credit Facility, the Former Eureka Credit Facility (prior to its termination), the 2021 Eureka Credit Facility and the Amended 2019 EQM Term Loan Agreement (prior to its termination) approximate fair value as the interest rates are based on prevailing market rates; these are considered Level 1 fair value measurements. As EQM's borrowings under its senior notes are not actively traded, their fair values are estimated using an income approach model that applies a discount rate based on prevailing market rates for debt with similar remaining time-to-maturity and credit risk; as such, their fair values are Level 2 fair value measurements. See Note 11 for further information on the fair value of the Company’s outstanding debt. The fair value of the Preferred Interest is a Level 3 fair value measurement and is estimated using an income approach model that applies a market-based discount rate. As of

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December 31, 2021 and 2020, the estimated fair values of the Preferred Interest were approximately $117 million and $127 million, respectively, and the carrying values of the Preferred Interest were approximately $100 million and $105 million, respectively.

13.    (Loss) Earnings Per Share

The following tables set forth the computation of the basic and diluted (loss) earnings per share attributable to Equitrans Midstream common shareholders for the years ended December 31, 2021, 2020 and 2019:

	Year Ended December 31,
	2021				2020				2019
	Basic		Diluted		Basic		Diluted		Basic		Diluted
	(In thousands, except per share data)
Net (loss) income	$	(1,365,948)	(1,365,948)		$	638,044	$	638,044	$	(64,959)	$	(64,959)
Less: Net income attributable to noncontrolling interests (excluding EQM Series A Preferred Units)	14,530		14,530		167,553		167,553		64,803		64,803
Less: EQM Series A Preferred Units interest in net income	—		—		47,359		47,359		73,981		73,981
Less: Preferred dividends	58,512		58,512		58,760		58,760		—		—
Net (loss) income attributable to Equitrans Midstream common shareholders	$	(1,438,990)	$	(1,438,990)	$	364,372	$	364,372	$	(203,743)	$	(203,743)
Basic weighted average common shares outstanding	433,008		433,008		343,935		343,935		254,884		254,884
Dilutive securities (a)	—		—		—		40		—		—
Diluted weighted average common shares outstanding	433,008		433,008		343,935		343,975		254,884		254,884
(Loss) earnings per share of common stock attributable to Equitrans Midstream common shareholders	$	(3.32)	$	(3.32)	$	1.06	$	1.06	$	(0.80)	$	(0.80)

(a) For the year ended December 31, 2021, the Company excluded 30,556 (in thousands) of weighted average anti-dilutive securities related to the Equitrans Midstream Preferred Shares and stock-based compensation awards. For the year ended December 31, 2020, the Company excluded 16,512 (in thousands) of weighted average anti-dilutive securities related to the Equitrans Midstream Preferred Shares and stock-based compensation awards. For the year ended December 31, 2019, the Company excluded 5 (in thousands) of weighted average anti-dilutive securities related to stock-based compensation awards. See Note 10 for information on the Company's stock awards. Additionally, for the applicable periods, EQM's dilutive securities issued and outstanding prior to the EQM Merger did not have a material impact on the Company's diluted earnings per share.

Preferred dividends include a $27.3 million premium recognized on the redemption of the EQM Series A Preferred Units as part of the Restructuring Closing during the year ended December 31, 2020.

The Company grants Equitrans Midstream phantom units to certain non-employee directors that will be paid in Equitrans Midstream common stock upon the director's termination of service on the Board. As there are no remaining service, performance or market conditions related to these awards, 498, 288 and 208 (in thousands) Equitrans Midstream phantom units were included in the computation of basic and diluted weighted average common shares outstanding for the years ended December 31, 2021, 2020 and 2019, respectively. See Note 10 for information on Equitrans Midstream phantom units.

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14.     Income Taxes

The following table summarizes income tax (benefit) expense for the years ended December 31, 2021, 2020 and 2019.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Current income tax expense:
Federal	$	—	$	—	$	—
State	4,853		2,613		—
Total current income tax expense	4,853		2,613		—
Deferred income tax (benefit) expense:
Federal	(274,857)		81,206		30,975
State	(75,087)		21,512		19,729
Total deferred income tax (benefit) expense	(349,944)		102,718		50,704
Total income tax (benefit) expense	$	(345,091)	$	105,331	$	50,704

The following table summarizes differences between income tax (benefit) expense and amounts computed at the applicable federal statutory rate on pre-tax income for the years ended December 31, 2021, 2020 and 2019.

	Years Ended December 31,
	2021			2020			2019
	(Thousands)
Income tax (benefit) expense at statutory rate	$	(359,318)		$	156,109		$	(2,993)
Valuation allowance	97,634			—			—
State income tax (benefit) expense	(80,277)			19,058			15,587
Noncontrolling interests' share of earnings	(3,051)			(45,132)			(29,145)
Impairment of goodwill	—			—			78,177
AFUDC - equity	(2,595)			(28,346)			(14,127)
Other	2,516			3,642			3,205
Income tax (benefit) expense	$	(345,091)		$	105,331		$	50,704
Effective tax rate	20.2		%	14.2		%	(355.7)		%

For the year ended December 31, 2021, the effective tax rate was lower than the federal and state statutory rates due to valuation allowances that limit tax benefits for the Company's federal and state deferred tax assets. For the year ended December 31, 2021, the effective tax rate was higher than the year ended December 31, 2020 primarily due to the EQM Merger impact on noncontrolling interest and the decrease in MVP Joint Venture AFUDC on the construction of MVP. The effective tax rate was also higher for the year ended December 31, 2021 due to the impairment of equity method investment (see Note 4) and its impact on the loss before income taxes. Noncontrolling interest and AFUDC – equity increase the effective tax rate in periods with a loss before income taxes.

For the year ended December 31, 2020, the effective tax rate was higher than the year ended December 31, 2019 primarily due to the impairment of goodwill (see Note 4) in 2019 and its impact on the loss before income taxes and noncontrolling interest. The effective tax rate was lower for the year ended December 31, 2019 as a result of the portion of goodwill for which there was no tax basis, partially offset by the impact of noncontrolling interest and AFUDC – equity. The net impact of the impairment of goodwill, including its impact to income tax expense at the statutory rate, state income tax expense, noncontrolling interests' share of earnings and impairment of goodwill was a reduction to income tax expense of approximately $43.0 million. The impact of AFUDC – equity increased for the year ended December 31, 2020 compared to prior periods primarily as a result of increases in the Company's pro-rata share of the MVP Joint Venture's AFUDC on the construction of the MVP.

For the years ended December 31, 2020 and 2019, the effective tax rates were lower than the federal and state statutory rates because the Company does not record income tax expense for the applicable periods on the portions of its income attributable to the noncontrolling member of Eureka Midstream and did not record income tax expense on the portion of its income attributable to noncontrolling limited partners of EQM for the periods prior to the closing of the EQM Merger.

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The following table summarizes the components of net deferred tax (liabilities) assets.

	December 31,
	2021		2020
	(Thousands)
Deferred income tax assets:
Investment in partnerships	$	67,153	$	—
Net operating loss carryforwards	51,231		54,925
Total deferred tax assets	118,384		54,925
Valuation allowance	(97,634)		—
Net deferred tax asset	20,750		54,925
Deferred income tax liabilities:
Investment in partnerships	—		(379,432)
Deferred revenue	(17,120)		(18,257)
Other	(3,630)		(3,132)
Total deferred income tax liability	(20,750)		(400,821)
Net deferred income tax asset (liability)	$	—	$	(345,896)

As of December 31, 2021, the Company has federal NOL of $34.5 million and state NOL of $16.7 million related to various state jurisdictions with a corresponding full valuation allowance of $34.5 million and $16.7 million, respectively. The Company also has a valuation allowance related to its investment in partnership deferred tax assets, net of offsetting deferred tax liability of $46.4 million. As of December 31, 2020, the Company had federal NOL of $41.4 million and state NOL of $13.5 million related to various state jurisdictions. The federal and commonwealth of Virginia and state of West Virginia NOL carryforwards have no expiration, but utilization is limited to 80% of taxable income in the year of utilization. The Company's Pennsylvania NOL carryforwards expire between 2038 and 2041 and utilization is limited to 40% of taxable income in the year of utilization.

For the year ended December 31, 2021, the Company believes that it is more likely than not that the benefit from its federal and state NOL carryforwards and reversals of the investment in partnership deferred tax asset, net of offsetting deferred tax liabilities, will not be realized. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not (greater than 50%) that a tax benefit will not be realized. In evaluating the need for a valuation allowance, management considers available evidence, both positive and negative, including potential sources of taxable income, income available in carry-back periods, future reversals of taxable temporary differences, projections of taxable income and income from tax planning strategies. Positive evidence includes reversing temporary differences and projection of future profitability within the carry-forward period, including from tax planning strategies. Negative evidence includes historical pre-tax book losses and Pennsylvania NOL expirations. A review of positive and negative evidence regarding these tax benefits resulted in the conclusion that valuation allowances on the Company’s federal and state NOL carryforwards and reversals of the investment in partnership deferred tax asset, net of offsetting deferred tax liabilities, were warranted as it was more likely than not that these assets will not be realized. Any determination to change the valuation allowance would impact the Company's income tax expense in the period in which such a determination is made.

The Company has not identified any uncertain tax positions for the years ended December 31, 2021, 2020 or 2019.

The Company is not subject to federal or state income tax examination by tax authorities for years before 2018.

15.     Concentrations of Credit Risk

The Company is exposed to the credit risk of its customers, including EQT, its largest customer, other producers, natural gas marketers, distribution companies and other end users. For the years ended December 31, 2021, 2020 and 2019, EQT accounted for approximately 59%, 64% and 69%, respectively, of the Company's total revenues across all of the Company's operating segments. As of December 31, 2021, EQT had credit ratings of BB+ from S&P (with a positive outlook), Ba1 from Moody's (with a stable outlook) and BB+ from Fitch (with a stable outlook), each of which were considered non-investment grade. As of December 31, 2020, EQT's credit ratings with each of S&P, Moody's and Fitch were considered non-investment grade.

As of December 31, 2021 and 2020, EQT accounted for 75% and 68%, respectively, of the Company's accounts receivable balances, while various other natural gas marketers and producers accounted for the majority of the remaining accounts receivable balances. To manage the credit risk related to transactions with marketers, the Company engages with only those that

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meet specified criteria for credit and liquidity strength and actively monitors accounts with marketers. In connection with its assessment of marketer credit and liquidity strength, the Company may request a letter of credit, guarantee, performance bond or other credit enhancement. The Company did not experience significant defaults on accounts receivable during the years ended December 31, 2021, 2020 and 2019.

16.     Commitments and Contingencies

In the ordinary course of business, various legal and regulatory claims and proceedings are pending or threatened against the Company and its subsidiaries. While the amounts claimed may be substantial, the Company is unable to predict with certainty the ultimate outcome of such claims and proceedings. The Company accrues legal and other direct costs related to loss contingencies when incurred. The Company establishes reserves whenever it believes it to be appropriate for pending matters. Furthermore, after consultation with counsel and considering available insurance, the Company believes that the ultimate outcome of any matter currently pending against it or any of its consolidated subsidiaries will not materially affect its business, financial condition, results of operations, liquidity or ability to pay dividends to its shareholders.

The Company is subject to federal, state and local environmental laws and regulations. These laws and regulations, which are constantly changing, can require expenditures for remediation and, in certain instances, can result in assessment of fines. The Company has established procedures for the ongoing evaluation of its operations to identify potential environmental exposures and to ensure compliance with regulatory requirements. The estimated costs associated with identified situations requiring remedial action are accrued; however, when recoverable through future regulated rates, certain of these costs are deferred as regulatory assets. Ongoing expenditures for compliance with current environmental laws and regulations, including investments in facilities to meet environmental requirements, have not been material. Management believes that required expenditures in respect of such current environmental laws and regulations will not be significantly different in either nature or amount in the future and, based on such current environmental laws and regulations, does not know of any future environmental liabilities that will have a material effect on the Company's business, financial condition, results of operations, liquidity or ability to pay dividends to the Company's shareholders. Nonetheless, the trend in environmental regulation is to place more restrictions and limitations on activities that may affect the environment, and it is generally expected that such trend will likely increase in the future. Thus, compliance with future environmental laws and regulations could result in significant costs and could have a material effect on the Company's business, financial condition, results of operations, liquidity or ability to pay dividends to the Company's shareholders. The Company has identified situations that require remedial action for which approximately $0.2 million, in each case, is included in regulatory and other long-term liabilities in the consolidated balance sheets as of December 31, 2021 and 2020, respectively.

Purchase obligations represent agreements to purchase goods or services that are enforceable, legally binding and specify all significant terms, including the approximate timing of the transaction. As of December 31, 2021, the Company had approximately $3.9 million of purchase obligations, which included commitments for capital expenditures, operating expenses and service contracts.

For information related to operating lease rental payments for office locations and compressors, see Note 7.

See Note 9 for discussion of the MVP Joint Venture guarantees and letters of credit. See Note 6 for a description of the EQT Global GGA.

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Item 9.        Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Not applicable.

Item 9A.     Controls and Procedures

Evaluation of Disclosure Controls and Procedures. Under the supervision and with the participation of management, including the Company's Principal Executive Officer and Principal Financial Officer, an evaluation of the Company's disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (Exchange Act)), was conducted as of the end of the period covered by this report. Based on that evaluation, the Principal Executive Officer and Principal Financial Officer concluded that the Company's disclosure controls and procedures were effective as of the end of the period covered by this report.

Changes in Internal Control over Financial Reporting. There were no changes in internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Exchange Act) that occurred during the fourth quarter of 2021 that have materially affected, or are reasonably likely to materially affect, the Company's internal control over financial reporting.

Management's Report on Internal Control over Financial Reporting. The management of the Company is responsible for establishing and maintaining adequate internal control over financial reporting. The Company's internal control system is designed to provide reasonable assurance to the management and Board of the Company regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. All internal control systems, no matter how well designed, have inherent limitations. Accordingly, even effective controls can provide only reasonable assurance with respect to financial statement preparation and presentation.

The management of the Company assessed the effectiveness of the Company's internal control over financial reporting as of December 31, 2021. In making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control-Integrated Framework (2013). Based on this assessment, management concluded that the Company maintained effective internal control over financial reporting as of December 31, 2021.

Ernst & Young LLP (Ernst & Young), the independent registered public accounting firm that audited the Company's consolidated financial statements, has issued an attestation report on the Company's internal control over financial reporting. Ernst & Young's attestation report on the Company's internal control over financial reporting appears in Part II, "Item 8. Financial Statements and Supplementary Data" of this Annual Report on Form 10-K and is incorporated by reference herein.

Item 9B.    Other Information

Not applicable.

Item 9C.    Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Not applicable.

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PART III

Item 10.     Directors, Executive Officers and Corporate Governance

The information required by Item 10 is incorporated by reference from the information under the captions "PROXY STATEMENT SUMMARY," "ITEM NO. 1 - ELECTION OF DIRECTORS," "EQUITY OWNERSHIP" AND "CORPORATE GOVERNANCE AND BOARD MATTERS" in the Proxy Statement and under the caption "Information About Our Executive Officers" in Part I of this Annual Report on Form 10-K.

Equitrans Midstream has a written Code of Business Conduct and Ethics that applies to Equitrans Midstream's Chief Executive Officer (Principal Executive Officer), Chief Financial Officer (Principal Financial Officer), Chief Accounting Officer (Principal Accounting Officer) and others. The Code of Business Conduct and Ethics is available on Equitrans Midstream's website at www.equitransmidstream.com (accessible by clicking on the "About" link on the main page followed by the "Governance" link), and a printed copy will be delivered free of charge on request by writing to the corporate secretary at Equitrans Midstream Corporation, c/o Corporate Secretary, 2200 Energy Drive, Canonsburg, Pennsylvania 15317. Any amendments to, or waivers from, a provision of the Company's Code of Business Conduct and Ethics that applies to the Company's Principal Executive Officer, Principal Financial Officer and Principal Accounting Officer and that relates to any element of the code of ethics enumerated in paragraph (b) of Item 406 of Regulation S-K shall be disclosed by posting such information on the Company's website at www.equitransmidstream.com.

Information required by Item 401 of Regulation S-K with respect to executive officers is included after Item 4 at the end of Part I of this Annual Report on Form 10-K under the caption "Information About Our Executive Officers" and is incorporated herein by reference.

Item 11.        Executive Compensation

The information required by Item 11 is incorporated by reference from the information under the captions "CORPORATE GOVERNANCE AND BOARD MATTERS," "DIRECTORS' COMPENSATION" and "EXECUTIVE COMPENSATION INFORMATION" in the Proxy Statement.

Item 12.        Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required by Item 12 is incorporated by reference from the information under the captions "EQUITY OWNERSHIP" and "SECURITIES AUTHORIZED FOR ISSUANCE UNDER EQUITY COMPENSATION PLANS" in the Proxy Statement.

Item 13.        Certain Relationships and Related Party Transactions and Director Independence

The information required by Item 13 is incorporated by reference from the information under the captions "ITEM NO. 1 - ELECTION OF DIRECTORS" and "CORPORATE GOVERNANCE AND BOARD MATTERS" in the Proxy Statement.

Item 14.        Principal Accounting Fees and Services

The information required by Item 14 is incorporated by reference from the information under the caption "ITEM NO. 4 - RATIFICATION OF APPOINTMENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM" in the Proxy Statement.

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PART IV

Item 15.        Exhibits and Financial Statement Schedules

(a)        Documents filed as part of this report

1	Financial Statements	Page  Reference
	Statements of Consolidated Comprehensive Income for the Years Ended December 31, 2021, 2020 and 2019	91
	Statements of Consolidated Cash Flows for the Years Ended December 31, 2021, 2020 and 2019	92
	Consolidated Balance Sheets as of December 31, 2021 and 2020	93
	Statements of Consolidated Shareholders' Equity and Mezzanine Equity for the Years Ended December 31, 2021, 2020 and 2019	94
	Notes to Consolidated Financial Statements	95
2	Financial Statement Schedules
	All schedules are omitted since the subject matter thereof is either not present or is not present in amounts sufficient to require submission of the schedules.
	The financial statements of the MVP Joint Venture, Series A are included in this filing as Exhibit 99.1 pursuant to Rule 3-09 of Regulation S-X.
3	Exhibits
	The exhibits referenced below are filed (or, as applicable, furnished) as part of this Annual Report on Form 10-K.

In reviewing any agreements incorporated by reference in this Form 10-K or filed with this Form 10-K, please remember that such agreements are included to provide information regarding their terms. They are not intended to be a source of financial, business or operational information about the Company or any of its subsidiaries or affiliates. The representations, warranties and covenants contained in these agreements are made solely for purposes of the agreements and are made as of specific dates; are solely for the benefit of the parties; may be subject to qualifications and limitations agreed upon by the parties in connection with negotiating the terms of the agreements, including being made for the purpose of allocating contractual risk between the parties instead of establishing matters as facts; and may be subject to standards of materiality applicable to the contracting parties that differ from those applicable to investors or security holders. Investors and security holders should not rely on the representations, warranties and covenants or any description thereof as characterizations of the actual state of facts or condition of the Company or any of its subsidiaries or affiliates or, in connection with acquisition agreements, of the assets to be acquired. Moreover, information concerning the subject matter of the representations, warranties and covenants may change after the date of the agreements. Accordingly, these representations and warranties alone may not describe the actual state of affairs as of the date they were made or at another time.

Exhibit No.	Document Description	Method of Filing
2.1	Separation and Distribution Agreement, dated as of November 12, 2018, by and among EQT Corporation, Equitrans Midstream Corporation and, solely for certain limited purposes therein, EQT Production Company.	Incorporated herein by reference to Exhibit 2.1 to Form 8-K (#001-38629) filed on November 13, 2018.
2.2	Tax Matters Agreement, dated as of November 12, 2018, by and between EQT Corporation and Equitrans Midstream Corporation.	Incorporated herein by reference to Exhibit 2.3 to Form 8-K (#001-38629) filed on November 13, 2018.
2.3	Employee Matters Agreement, dated as of November 12, 2018, by and between EQT Corporation and Equitrans Midstream Corporation.	Incorporated herein by reference to Exhibit 2.4 to Form 8-K (#001-38629) filed on November 13, 2018.
2.4**	Purchase and Sale Agreement, dated as of March 13, 2019, by and between EQM Midstream Partners, LP and North Haven Infrastructure Partners II Buffalo Holdings, LLC.	Incorporated herein by reference to Exhibit 2.1 to Form 8-K (#001-38629) filed on March 15, 2019.

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2.5**	Agreement and Plan of Merger, dated as of February 26, 2020, by and among Equitrans Midstream Corporation, EQM LP Corporation, LS Merger Sub, LLC, EQM Midstream Partners, LP and EQGP Services, LLC.	Incorporated herein by reference to Exhibit 2.1 to Form 8-K (#001-38629) filed on February 28, 2020.
3.1	Second Amended and Restated Articles of Incorporation of Equitrans Midstream Corporation.	Incorporated herein by reference to Exhibit 3.1 to Form 8-K (#001-38629) filed on April 28, 2021.
3.2	Third Amended and Restated Bylaws of Equitrans Midstream Corporation.	Incorporated herein by reference to Exhibit 3.3 to Form 8-K (#001-38629) filed on April 28, 2021.
4.1	Indenture, dated as of August 1, 2014, by and among EQM Midstream Partners, LP (formerly known as EQT Midstream Partners, LP), as issuer, the subsidiaries of EQM Midstream Partners, LP (formerly known as EQT Midstream Partners, LP) party thereto, and The Bank of New York Mellon Trust Company, N.A., as trustee.	Incorporated herein by reference to Exhibit 4.1 to EQM Midstream Partners, LP's Form 8-K (#001-35574) filed on August 1, 2014.
4.2	First Supplemental Indenture, dated as of August 1, 2014, by and among EQM Midstream Partners, LP (formerly known as EQT Midstream Partners, LP), as issuer, the subsidiaries of EQM Midstream Partners, LP (formerly known as EQT Midstream Partners, LP) party thereto, and The Bank of New York Mellon Trust Company, N.A., as trustee.	Incorporated herein by reference to Exhibit 4.2 to EQM Midstream Partners, LP's Form 8-K (#001-35574) filed on August 1, 2014.
4.3	Second Supplemental Indenture, dated as of November 4, 2016, by and between EQM Midstream Partners, LP (formerly known as EQT Midstream Partners, LP), as issuer, and The Bank of New York Mellon Trust Company, N.A., as trustee.	Incorporated herein by reference to Exhibit 4.2 to EQM Midstream Partners, LP's Form 8-K (#001-35574) filed on November 4, 2016.
4.4	Third Supplemental Indenture, dated as of June 25, 2018, by and between EQM Midstream Partners, LP (formerly known as EQT Midstream Partners, LP), as issuer, and The Bank of New York Mellon Trust Company, N.A., as trustee.	Incorporated herein by reference to Exhibit 4.2 to EQM Midstream Partners, LP's Form 8-K (#001-35574) filed on June 25, 2018.
4.5	Fourth Supplemental Indenture, dated as of June 25, 2018, by and between EQM Midstream Partners, LP (formerly known as EQT Midstream Partners, LP), as issuer, and The Bank of New York Mellon Trust Company, N.A., as trustee.	Incorporated herein by reference to Exhibit 4.4 to EQM Midstream Partners, LP's Form 8-K (#001-35574) filed on June 25, 2018.
4.6	Fifth Supplemental Indenture, dated as of June 25, 2018, by and between EQM Midstream Partners, LP (formerly known as EQT Midstream Partners, LP), as issuer, and The Bank of New York Mellon Trust Company, N.A., as trustee.	Incorporated herein by reference to Exhibit 4.6 to EQM Midstream Partners, LP's Form 8-K (#001-35574) filed on June 25, 2018.
4.7	Shareholder and Registration Rights Agreement, dated as of November 12, 2018, by and between EQT Corporation and Equitrans Midstream Corporation.	Incorporated herein by reference to Exhibit 4.1 to Form 8-K (#001-38629) filed on November 13, 2018.
4.8	Description of Certain of Registrant's Securities.	Filed herewith as Exhibit 4.8.
4.9	Registration Rights Agreement, dated as of June 17, 2020, by and among Equitrans Midstream Corporation and the Investors party thereto.	Incorporated herein by reference to Exhibit 4.1 to Form 8-K (#001-38629) filed on June 17, 2020.
4.10	Indenture, dated as of June 18, 2020, by and between EQM Midstream Partners, LP and The Bank of New York Mellon Trust Company, N.A., as trustee.	Incorporated herein by reference to Exhibit 4.1 to Form 8-K (#001-38629) filed on June 18, 2020.
4.11	Indenture, dated as of January 8, 2021, by and between EQM Midstream Partners, LP and The Bank of New York Mellon Trust Company, N.A., as trustee.	Incorporated herein by reference to Exhibit 4.1 to Form 8-K (#001-38629) filed on January 8, 2021.

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10.1(a)	Third Amended and Restated Credit Agreement, dated as of October 31, 2018, by and among EQM Midstream Partners, LP, Wells Fargo Bank, National Association, as Administrative Agent, Swing Line Lender and an L/C Issuer, and the other lenders party thereto.	Incorporated herein by reference to Exhibit 10.1 to EQM Midstream Partners, LP's Form 8-K (#001-35574) filed on October 31, 2018.
10.1(b)	First Amendment to Third Amended and Restated Credit Agreement, dated as of March 30, 2020, by and among EQM Midstream Partners, LP, the lender parties thereto and Wells Fargo Bank, National Association, as administrative agent.	Incorporated herein by reference to Exhibit 10.1 to Form 8-K (#001-38629) filed on March 30, 2020.
10.1(c)	Second Amendment to Third Amended and Restated Credit Agreement, dated as of April 16, 2021, by and among EQM Midstream Partners, LP, the lender parties thereto and Wells Fargo Bank, National Association, as administrative agent.	Incorporated herein by reference to Exhibit 10.1 to Form 8-K (#001-38629) filed on April 19, 2021.
10.2	Sublease Agreement, effective as of March 1, 2011, by and between Equitrans, L.P. and EQT Production Company.	Incorporated herein by reference to Exhibit 10.12 to Amendment No. 2 to EQM Midstream Partners, LP's Form S-1/A Registration Statement (#333-179487) filed on May 10, 2012.
10.3	Amendment of Sublease Agreement, dated as of April 5, 2012, by and between Equitrans, L.P. and EQT Production Company.	Incorporated herein by reference to Exhibit 10.13 to Amendment No. 2 to EQM Midstream Partners, LP's Form S-1/A Registration Statement (#333-179487) filed on May 10, 2012.
10.4(a)	Second Amended and Restated Gas Gathering and Compression Agreement, dated as of March 31, 2017, by and between Rice Drilling D LLC and EQM Olympus Midstream LLC (formerly known as Rice Olympus Midstream LLC). Specific items in this exhibit have been redacted, as marked by three asterisks [***], because confidential treatment for those items has been granted by the SEC. The redacted material has been separately filed with the SEC.	Incorporated herein by reference to Exhibit 10.3 to EQM Midstream Partners, LP's Form 10-Q (#001-35574) for the quarterly period ended June 30, 2018.
10.4(b)#	Letter Agreement, dated as of December 21, 2020, by and between EQM Olympus Midstream, LLC and Rice Drilling D LLC.	Filed herewith as Exhibit 10.4(b).
10.4(c)#	Letter Agreement, dated as of February 18, 2021, by and between EQM Olympus Midstream, LLC and Rice Drilling D LLC.	Incorporated herein by reference to Exhibit 10.11 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2021.
10.4(d)#	Letter Agreement, dated as of February 1, 2022, by and between EQM Olympus Midstream, LLC and Rice Drilling D LLC.	Filed herewith as Exhibit 10.4(d).
10.5	Secondment Agreement, dated as of November 13, 2018, by and among Equitrans Midstream Corporation, EQM Midstream Partners, LP, and EQM Midstream Services, LLC.	Incorporated herein by reference to Exhibit 10.3 to Form 8-K (#001-38629) filed on November 13, 2018.
10.6	Amended and Restated Omnibus Agreement, dated as of March 31, 2019, by and among Equitrans Midstream Corporation, EQM Midstream Partners, LP, EQGP Services, LLC and, for limited purposes, EQM Midstream Services, LLC.	Incorporated herein by reference to Exhibit 10.6 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2019.

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10.7(a)	Third Amended and Restated Limited Liability Company Agreement of Mountain Valley Pipeline, LLC, dated as of April 6, 2018, by and among MVP Holdco, LLC, US Marcellus Gas Infrastructure, LLC, WGL Midstream, Inc., Con Edison Gas Pipeline and Storage, LLC, RGC Midstream, LLC and Mountain Valley Pipeline, LLC. Specific items in this exhibit have been redacted, as marked by three asterisks [***], because confidential treatment for those items has been granted by the SEC. The redacted material has been separately filed with the SEC.	Incorporated herein by reference to Exhibit 10.1 to EQM Midstream Partners, LP's Form 10-Q/A (#001-35574) for the quarterly period ended March 31, 2018.
10.7(b)	First Amendment to Third Amended and Restated Limited Liability Company Agreement of Mountain Valley Pipeline, LLC, dated as of February 5, 2020, by and among MVP Holdco, LLC, US Marcellus Gas Infrastructure, LLC, WGL Midstream, Inc., Con Edison Gas Pipeline and Storage, LLC, RGC Midstream, LLC and Mountain Valley Pipeline, LLC.	Incorporated herein by reference to Exhibit 10.21(b) to Form 10-K (#001-38629) for the year ended December 31, 2019.
10.8	Amended and Restated Omnibus Agreement, dated November 13, 2018, among EQT Corporation, EQM Midstream Partners, LP and EQM Midstream Services, LLC.	Incorporated herein by reference to Exhibit 10.1 to EQM Midstream Partners, LP's Form 8-K (#001-35574) filed on November 13, 2018.
10.9	Second Amended and Restated Omnibus Agreement, dated November 13, 2018, among EQT Corporation, RM Partners LP, EQM Midstream Management LLC, and EQM Poseidon Midstream LLC.	Incorporated herein by reference to Exhibit 10.2 to EQM Midstream Partners, LP's Form 8-K (#001-35574) filed on November 13, 2018.
10.10(a)	Transportation Service Agreement Applicable to Firm Transportation Service Under Rate Schedule FTS, Contract No. EQTR 20242-852, dated as of September 24, 2014, and Exhibit A amended August 12, 2020 and Exhibit C amended April 1, 2019 by and between Equitrans, L.P. and EQT Energy, LLC.	Filed herewith as Exhibit 10.10(a).
10.10(b)	Transportation Service Agreement Applicable to Firm Transportation Service Under Rate Schedule FTS, Contract No. EQTR 20242-852, dated as of September 24, 2014 as Amended December 6, 2021 by and between Equitrans L.P and EQT Energy, LLC.	Filed herewith as Exhibit 10.10(b).
10.10(c)	Transportation Service Agreement Applicable to Firm Transportation Service Under Rate Schedule FTS, Contract No. EQTR 20242-852, dated as of September 24, 2014 as amended December 6, 2021 by and between Equitrans L.P and EQT Energy, LLC.	Filed herewith as Exhibit 10.10(c).
10.11	Transportation Service Agreement Applicable to Firm Transportation Service Under Rate Schedule FTS, Contract No. EQTR19837-1296, dated as of January 8, 2016 and amended December 6, 2021, by and between Equitrans, L.P. and EQT Energy, LLC.	Filed herewith as Exhibit 10.11.
10.12*	Equitrans Midstream Corporation Amended and Restated Directors’ Deferred Compensation Plan.	Incorporated herein by reference to Exhibit 10.18 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2020.
10.13(a)*	Equitrans Midstream Corporation 2018 Long-Term Incentive Plan.	Incorporated herein by reference to Exhibit 4.3 to Registration Statement on Form S-8 (File No. 333-228337) filed on November 9, 2018.
10.13(b)*	First Amendment to the Equitrans Midstream Corporation 2018 Long-Term Incentive Plan.	Incorporated herein by reference to Exhibit 10.2 to Form 8-K (#001-38629) filed on June 17, 2020.
10.14*	Letter Agreement, dated as of August 9, 2018, with Thomas F. Karam.	Incorporated herein by reference to Exhibit 10.57 to Registration Statement on Form 10-12B/A (#001-38629) filed on October 18, 2018.

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10.15*	Letter Agreement, dated as of September 4, 2018, with Kirk R. Oliver.	Incorporated herein by reference to Exhibit 10.58 to Registration Statement on Form 10-12B/A (#001-38629) filed on October 18, 2018.
10.16*	Amended and Restated Confidentiality, Non-Solicitation and Non-Competition Agreement, dated as of January 15, 2019, with Diana M. Charletta	Incorporated herein by reference to Exhibit 10.1 to Form 8-K (#001-38629) filed on January 22, 2019.
10.17*	Amended and Restated Confidentiality, Non-Solicitation and Non-Competition Agreement, dated as of November 13, 2018, by and between Equitrans Midstream Corporation and Thomas F. Karam.	Incorporated herein by reference to Exhibit 10.9 to Form 8-K (#001-38629) filed on November 13, 2018.
10.18*	Amended and Restated Confidentiality, Non-Solicitation and Non-Competition Agreement, dated as of November 13, 2018, by and between Equitrans Midstream Corporation and Kirk R. Oliver.	Incorporated herein by reference to Exhibit 10.10 to Form 8-K (#001-38629) filed on November 13, 2018.
10.19*	Letter Agreement, dated April 2, 2019, with Stephen M. Moore.	Incorporated herein by reference to Exhibit 10.12 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2019.
10.20*	Confidentiality, Non-Solicitation and Non-Competition Agreement, dated April 15, 2019, with Stephen M. Moore.	Incorporated herein by reference to Exhibit 10.13 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2019.
10.21*	Form of Agreement of Assignment of Confidentiality, Non-Solicitation and Non-Competition Agreement.	Incorporated herein by reference to Exhibit 10.11 to Form 8-K (#001-38629) filed on November 13, 2018.
10.22*##	Confidentiality, Non-Solicitation and Change of Control Agreement, dated as of April 14, 2020, by and between Equitrans Midstream Corporation and Brian P. Pietrandrea.	Incorporated herein by reference to Exhibit 10.17 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2020.
10.23*	Form of Equitrans Midstream Corporation Director and/or Executive Officer Indemnification Agreement.	Incorporated herein by reference to Exhibit 10.16 to Registration Statement on Form 10-12B/A (#001-38629) filed on October 18, 2018.
10.24*	Equitrans Midstream Corporation 2019 Performance Share Unit Program.	Incorporated herein by reference to Exhibit 10.7(a) to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2019.
10.25*	Form of Equitrans Midstream Corporation Restricted Stock Award Agreement (Standard) under 2018 Long-Term Incentive Plan (2019 grants).	Incorporated herein by reference to Exhibit 10.7(b) to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2019.
10.26*	Form of Participant Award Agreement under the 2019 Performance Share Unit Program.	Incorporated herein by reference to Exhibit 10.7(c) to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2019.
10.27*	Amendment to 2018 EQT Incentive Performance Share Unit Program.	Incorporated herein by reference to Exhibit 10.8 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2019.
10.28*	Amended and Restated Equitrans Midstream Corporation Short-Term Incentive Plan.	Incorporated herein by reference to Exhibit 10.16 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2020.
10.29*	Form of Equitrans Midstream Corporation Director Participant Award Agreement.	Incorporated herein by reference to Exhibit 10.10 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2019.

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10.30*	Equitrans Midstream Corporation 2020 Performance Share Unit Program.	Incorporated herein by reference to Exhibit 10.13 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2020.
10.31*	Form of Participant Award Agreement under 2020 Performance Share Unit Program.	Incorporated herein by reference to Exhibit 10.14 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2020.
10.32*	Form of Equitrans Midstream Corporation Restricted Stock Award Agreement (2020 Awards).	Incorporated herein by reference to Exhibit 10.15 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2020.
10.33**	Preferred Restructuring Agreement, dated as of February 26, 2020, by and among Equitrans Midstream Corporation, EQM Midstream Partners, LP and the Investors party thereto.	Incorporated herein by reference to Exhibit 10.1 to Form 8-K (#001-38629) filed on February 28, 2020.
10.34(a)#	Gas Gathering and Compression Agreement, dated as of February 26, 2020, by and among EQT Corporation, EQT Production Company, Rice Drilling B LLC, EQT Energy, LLC and EQM Gathering Opco, LLC.	Incorporated herein by reference to Exhibit 10.4 to Form 8-K/A (#001-38629) filed on March 13, 2020.
10.34(b)#	First Amendment to Gas Gathering and Compression Agreement, dated as of August 26, 2020, by and among EQT Production Company, Rice Drilling B LLC, EQT Energy, LLC and EQM Gathering Opco, LLC.	Incorporated herein by reference to Exhibit 10.1 to Form 10-Q (#001-38629) for the quarterly period ended September 30, 2020.
10.34(c)#	Letter Agreement, dated as of February 23, 2021, by and among EQM Gathering Opco, LLC, EQT Corporation, EQT Production Company, Rice Drilling B LLC and EQT Energy, LLC	Incorporated herein by reference to Exhibit 10.7 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2021.
10.34(d)#	Letter Agreement, dated as of February 2, 2021, by and among EQM Gathering Opco, LLC, EQT Corporation, EQT Production Company, Rice Drilling B LLC and EQT Energy, LLC.	Incorporated herein by reference to Exhibit 10.8 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2021.
10.34(e)#	Letter Agreement, dated as of February 9, 2021, by and among EQM Gathering Opco, LLC, EQM Olympus Midstream, LLC, EQT Corporation, EQT Production Company, Rice Drilling B LLC, EQT Energy, LLC and Rice Drilling D LLC.	Incorporated herein by reference to Exhibit 10.9 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2021.
10.34(f)#	Letter Agreement, dated as of February 3, 2021, by and among EQM Gathering Opco, LLC, EQT Corporation, EQT Production Company, Rice Drilling B LLC and EQT Energy, LLC.	Incorporated herein by reference to Exhibit 10.10 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2021.
10.34(g)#	Letter Agreement, dated as of July 10, 2021, by and among EQM Gathering Opco, LLC, EQT Corporation, EQT Production Company, Rice Drilling B LLC, and EQT Energy, LLC.	Incorporated herein by reference to Exhibit 10.1 to Form 10-Q (#001-38629) for the quarterly period ended September 30, 2021.
10.34(h)#	Letter Agreement, dated as of August 25, 2021, by and among EQM Gathering Opco, LLC, EQT Corporation, EQT Production Company, Rice Drilling B LLC, and EQT Energy, LLC.	Incorporated herein by reference to Exhibit 10.2 to Form 10-Q (#001-38629) for the quarterly period ended September 30, 2021.
10.34(i)#	Letter Agreement, dated as of September 13, 2021, by and among EQM Gathering Opco, LLC, EQT Corporation, EQT Production Company, Rice Drilling B LLC, and EQT Energy, LLC.	Incorporated herein by reference to Exhibit 10.3 to Form 10-Q (#001-38629) for the quarterly period ended September 30, 2021.
10.34(j)#	Second Amendment to Gas Gathering and Compression Agreement, dated as of December 6, 2021, by and among EQT Production Company, Rice Drilling B LLC, EQT Energy, LLC and EQM Gathering Opco, LLC.	Filed herewith as Exhibit 10.34(j).

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10.34(k)#	Third Amendment to Gas Gathering and Compression Agreement, dated as of December 21, 2021, by and among EQT Production Company, Rice Drilling B LLC, EQT Energy, LLC and EQM Gathering Opco, LLC.	Filed herewith as Exhibit 10.34(k).
10.34(l)#	Letter Agreement, dated as of November 1, 2020, by and among EQM Gathering Opco, LLC, EQT Corporation, EQT Production Company, Rice Drilling B LLC and EQT Energy, LLC.	Incorporated herein by reference to Exhibit 10.45 to Form 10-K (#001-38629) for the year ended December 31, 2020.
10.34(m)#	Letter Agreement, dated as of February 4, 2022, by and among EQM Gathering Opco, LLC, EQT Corporation, EQT Production Company, Rice Drilling B LLC and EQT Energy, LLC.	Filed herewith as Exhibit 10.34(m).
10.35#	Credit Letter Agreement, dated as of February 26, 2020, by and between EQM Midstream Partners, LP and EQT Corporation.	Incorporated herein by reference to Exhibit 10.5 to Form 10-Q (#001-38629) for the quarterly period ended March 31, 2020.
10.36	Water Services Letter Agreement, dated as of February 26, 2020, by and among EQT Production Company, Rice Drilling B LLC, EQM Gathering Opco, LLC and Equitrans Water Services (PA) LLC.	Incorporated herein by reference to Exhibit 10.6 to Form 8-K/A (#001-38629) filed on March 13, 2020.
10.37	Purchase Agreement, dated June 16, 2020, by and between EQM Midstream Partners, LP and J.P. Morgan Securities LLC, as representative of the several initial purchasers named on Schedule 1 thereto.	Incorporated herein by reference to Exhibit 10.1 to Form 8-K (#001-38629) filed on June 18, 2020.
10.38	Purchase Agreement, dated January 4, 2021, by and among EQM Midstream Partners, LP, Equitrans Midstream Corporation (for certain limited purposes) and Barclays Capital Inc., as representative of the several initial purchasers named on Schedule 1 thereto.	Incorporated herein by reference to Exhibit 10.1 to Form 8-K (#001-38629) filed on January 5, 2021.
10.39*	Equitrans Midstream Corporation Executive Short-Term Incentive Plan (2021).	Incorporated herein by reference to Exhibit 10.46 to Form 10-K (#001-38629) filed on February 23, 2021.
10.40*	Equitrans Midstream Corporation 2021 Performance Share Unit Program.	Incorporated herein by reference to Exhibit 10.47 to Form 10-K (#001-38629) filed on February 23, 2021.
10.41*	Form of Participant Award Agreement under 2021 Performance Share Unit Program.	Incorporated herein by reference to Exhibit 10.48 to Form 10-K (#001-38629) filed on February 23, 2021.
10.42*	Form of Equitrans Midstream Corporation Restricted Stock Award Agreement (2021 Awards).	Incorporated herein by reference to Exhibit 10.49 to Form 10-K (#001-38629) filed on February 23, 2021.
10.43*	Form of Equitrans Midstream Corporation Senior Executive 2021 MVP Performance Share Units Award Agreement.	Incorporated herein by reference to Exhibit 10.3 to Form 8-K (#001-38629) filed on December 7, 2021.
10.44*	Equitrans Midstream Corporation 2022 Performance Share Unit Program.	Filed herewith as Exhibit 10.44.
10.45*	Form of Participant Award Agreement under 2022 Performance Share Unit Program.	Filed herewith as Exhibit 10.45.
10.46*	Form of Equitrans Midstream Corporation Restricted Stock Award Agreement (2022 Awards).	Filed herewith as Exhibit 10.46.
10.47*	Equitrans Midstream Corporation Amended and Restated Executive Short-Term Incentive Plan	Filed herewith as Exhibit 10.47.
21.1	Schedule of Subsidiaries.	Filed herewith as Exhibit 21.1.
23.1	Consent of Independent Registered Public Accounting Firm.	Filed herewith as Exhibit 23.1.
23.2	Consent of Independent Auditors (Mountain Valley Pipeline, LLC - Series A).	Filed herewith as Exhibit 23.2.
31.1	Rule 13(a)-14(a) Certification of Principal Executive Officer.	Filed herewith as Exhibit 31.1.

146

31.2	Rule 13(a)-14(a) Certification of Principal Financial Officer.	Filed herewith as Exhibit 31.2.
32	Section 1350 Certification of Principal Executive Officer and Principal Financial Officer.	Furnished herewith as Exhibit 32.
99.1	Mountain Valley Pipeline, LLC (Series A) financial statements.	Filed herewith as Exhibit 99.1.
101	Inline Interactive Data File.	Filed herewith as Exhibit 101.
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)	Filed herewith as Exhibit 104.

* Management contract and compensatory arrangement in which any director or any named executive officer participates

** Schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K. Equitrans Midstream Corporation hereby undertakes to furnish supplemental copies of any of the omitted schedules and exhibits upon request by the SEC.

# Certain portions of the exhibits that are not material and is of the type Equitrans Midstream treats as confidential have been redacted pursuant to Item 601(b)(10)(iv) of Regulation S-K. Copies of the unredacted exhibits will be furnished to the SEC upon request.

## Certain personally identifiable information has been omitted from this exhibit pursuant to Item 601(a)(6) of Regulation S-K.

147

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Equitrans Midstream Corporation
(Registrant)
By:	/s/ KIRK R. OLIVER
	Kirk R. Oliver
	Senior Vice President and Chief Financial Officer
	February 23, 2022

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

148

/s/ THOMAS F. KARAM	Chief Executive	February 23, 2022
Thomas F. Karam	Officer and Chairman
(Principal Executive Officer)
/s/ KIRK R. OLIVER	Senior Vice President and Chief	February 23, 2022
Kirk R. Oliver	Financial Officer
(Principal Financial Officer)
/s/ BRIAN P. PIETRANDREA	Vice President and Chief	February 23, 2022
Brian P. Pietrandrea	Accounting Officer
(Principal Accounting Officer)
/s/ VICKY A. BAILEY	Director	February 23, 2022
Vicky A. Bailey
/s/ SARAH M. BARPOULIS	Director	February 23, 2022
Sarah M. Barpoulis
/s/ KENNETH M. BURKE	Director	February 23, 2022
Kenneth M. Burke
/s/ PATRICIA K. COLLAWN	Director	February 23, 2022
Patricia K. Collawn
/s/ MARGARET K. DORMAN	Director	February 23, 2022
Margaret K. Dorman
/s/ D. MARK LELAND	Director	February 23, 2022
D. Mark Leland
/s/ NORMAN J. SZYDLOWSKI	Director	February 23, 2022
Norman J. Szydlowski
/s/ ROBERT F. VAGT	Director	February 23, 2022
Robert F. Vagt

149

EX-4.8

Exhibit 4.8

DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934

Equitrans Midstream Corporation (our, “ETRN” or the “Company”) has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended, our common stock, no par value.

DESCRIPTION OF COMMON STOCK

The following is a description of the terms of our common stock based on the Company’s second amended and restated articles of incorporation (Articles), the Company’s third amended and restated by-laws (Bylaws) and relevant provisions of the laws of the Commonwealth of Pennsylvania. This summary is not complete, and is qualified in its entirety by reference to the Articles, Bylaws and the laws of the Commonwealth of Pennsylvania.

Authorized Capital Stock

The Company is authorized to issue 1,250,000,000 shares of common stock, no par value, and 50,000,000 shares of preferred stock, no par value, of which 30,018,446 shares are designated as the “Series A Perpetual Convertible Preferred Shares” (Series A Preferred Stock). There are 30,018,446 shares of preferred stock issued and outstanding, all of which are Series A Preferred Stock. The outstanding shares of the Company’s common stock are fully paid and nonassessable.

The shares of Series A Preferred Stock ranks senior to the Company’s common stock with respect to dividend rights and rights upon liquidation.

Common Stock

Voting Rights

Each share of the Company's common stock is entitled to one vote on all matters requiring a vote of shareholders. Shareholders do not have cumulative voting rights in elections of directors. A director nominee will be elected to the Company's board of directors (the Company Board) at a meeting of shareholders if the votes cast “for” such nominee exceed the votes cast "against" such nominee (excluding abstentions), unless the number of nominees exceeds the number of directors to be elected, in which case the nominees receiving the highest number of votes up to the number of directors to be elected will be elected.

The Series A Preferred Stock holders vote on an as-converted basis with Company common stock and have certain other class voting rights with respect to any amendment to the Articles (including by merger or otherwise) that would be adverse (other than in a de minimis manner) to any of the rights, preferences or privileges of the Series A Preferred Stock.

Dividend Rights

Subject to the rights and preferences of the holders of the Series A Preferred Stock or any other outstanding shares of preferred stock, each share of the Company's common stock is entitled to receive any dividends, in cash,

securities or property, as the Company Board may declare. Pennsylvania law prohibits the payment of dividends and the repurchase of capital stock if the Company is insolvent or if the Company would become insolvent after the dividend or repurchase (unless, in the case of a repurchase, the purchase price is deferred such that the Company will not become insolvent when it is paid).

The holders of the Series A Preferred Stock receive cumulative quarterly dividends at a rate per annum of 9.75% for each quarter ending on or before March 31, 2024, and thereafter quarterly dividends at a rate per annum equal to the sum of (i) three-month LIBOR as of the LIBOR Determination Date (as defined in the Articles) in respect of the applicable quarter and (ii) 8.15%; provided that such rate per annum in respect of periods after March 31, 2024 will not be less than 10.50%. The Company is not permitted to pay any dividends on any Junior Securities (as defined in the Articles), including on Company common stock, prior to paying the quarterly dividends payable to the holders of the Series A Preferred Stock, including any previously accrued and unpaid dividends.

Liquidation and Other Rights

In the event of the liquidation, dissolution or winding up, either voluntarily or involuntarily, of the Company, subject to the rights and preferences of the Series A Preferred Stock holders or holders of any other outstanding shares of preferred stock, holders of common stock will be entitled to share pro rata in all of the Company's remaining assets available for distribution.

The holders of the Series A Preferred Stock are entitled to certain liquidation payments in preference to the holders of, and before any payment or distribution is made on, any junior stock of the Company, including common stock, on the terms and payable in the manner set forth in the Articles.

Miscellaneous

The holders of the Company's common stock do not have preemptive rights or conversion rights, and there are no redemption or sinking fund provisions applicable to the Company's common stock. Holders of fully paid shares of the Company's common stock are not subject to any liability for further calls or assessments.

Ability to Issue Preferred Stock

Under Pennsylvania law and the Articles, the Company Board is authorized to issue shares of preferred stock from time to time in one or more series without shareholder approval. Subject to limitations prescribed by Pennsylvania law, the Articles and the Bylaws, the Company Board is able to determine the number of shares constituting each series of preferred stock and the designation, preferences, qualifications, limitations, restrictions, and special or relative rights or privileges of that series. Except as otherwise set forth in the Articles with respect to the Series A Preferred Stock, holders of the Company preferred stock have no voting rights for the election of directors and have no other voting rights except as the Company Board may determine pursuant to its authority under the Articles with respect to any particular series of the Company preferred stock and except as provided by law.

The particular terms of any series of preferred stock will be set by the Company Board for that series of preferred stock. Those terms may include:

• the distinctive serial designation of such series;

• the annual dividend rate for such series, if any, and the date or dates from which dividends shall commence to accrue;

• the redemption price or prices, if any, for shares of such series and the terms and conditions on which such shares may be redeemed;

• the provisions for a sinking, purchase or similar fund, if any, for the redemption or purchase of shares of such series;

• the preferential amount or amounts payable upon shares of such series in the event of the Company's voluntary or involuntary liquidation;

• the voting rights, if any, of shares of such series;

• the terms and conditions, if any, upon which shares of such series may be converted and the class or classes or series of the Company's securities into which such shares may be converted;

• the relative seniority, parity or junior rank of such series with respect to other series of preferred stock then or thereafter to be issued; and

• any other specific terms, preferences, rights, privileges, limitations or restrictions of such series.

The rights of the holders of common stock are be subject to, and may be adversely affected by, the rights of the holders of the Series A Preferred Stock or holders of any other preferred stock that may be issued.

Anti-Takeover Effect of the Company's Governing Documents and Pennsylvania Business Corporation Law

The Articles and the Bylaws contain a number of provisions relating to corporate governance and to the rights of the Company shareholders. Certain of these provisions may have a potential “anti-takeover” effect by delaying, deferring or preventing a change of control of the Company. In addition, certain provisions of Pennsylvania law may have a similar effect.

Required Vote for Amendment of the Articles and the Bylaws

Subject to the voting rights given to holders of the Series A Preferred shares or any particular series of preferred stock by the Company Board, if any, pursuant to the Articles, and except as may be specifically provided to the contrary in any other provision in the Articles with respect to amendment or repeal of such provision, the Articles cannot be amended and no provision may be repealed by the Company shareholders without the affirmative vote of a majority of the votes cast by all shareholders entitled to vote thereon..

The Company Board may make, amend and repeal the Bylaws with respect to those matters which are not, by statute, reserved exclusively to the Company shareholders, subject to the power of the Company shareholders to change such action. No bylaw may be made, amended or repealed by the Company shareholders unless such action is approved by the affirmative vote of a majority of the votes cast by all shareholders entitled to vote thereon.

Preferred Stock

The purpose of authorizing the Company Board to issue preferred stock and determine its rights and preferences is to eliminate delays associated with a shareholder vote on specific issuances. The issuance of preferred stock, while providing desirable flexibility in connection with possible acquisitions and other corporate purposes, could have the effect of making it more difficult for a third party to acquire, or of discouraging a third party from attempting to acquire, a majority of the Company's outstanding voting stock. The existence of any authorized but undesignated preferred stock may have a depressive effect on the market price of the Company's common stock.

Anti-Takeover Law Provisions under the Pennsylvania Business Corporation Law

The Company is subject to certain provisions of Chapter 25 of the Pennsylvania Business Corporation Law (the PBCL), which may have the effect of discouraging or rendering more difficult a hostile takeover attempt against the Company, including Section 2524, Section 2538, Subchapter 25E and Subchapter 25F of the PBCL.

Under Section 2524 of the PBCL, shareholders of the Company cannot act by partial written consent except if permitted under the Articles. The Articles do not permit shareholder action by partial written consent except with respect to amending the number of votes required to elect a nominee for director to the Company Board.

Section 2538 of the PBCL requires enhanced shareholder approval for certain transactions between the Company and an “interested shareholder” (defined as a shareholder who is a party to the transaction or is treated differently from other shareholders). Section 2538 applies if an interested shareholder (together with his, her or its affiliates) is to (i) be a party to a merger or consolidation, a share exchange or certain sales of assets involving the Company or one of the Company's subsidiaries; (ii) receive a disproportionate amount of any securities of any corporation which survives or results from a division; (iii) be treated differently from others holding shares of the same class in a voluntary dissolution of such corporation; or (iv) have his or her percentage of voting or economic share interest in such corporation materially increased relative to substantially all other shareholders in a reclassification. Under these circumstances, the proposed transaction must be approved by the affirmative vote of the holders of shares representing at least a majority of the votes that all disinterested shareholders are entitled to cast with respect to such transaction. However, this special voting requirement will not apply where the proposed transaction has been approved in a prescribed manner by the members of the Company Board independent from the interested shareholder or if certain other conditions, including the amount of consideration to be paid to certain shareholders,

are satisfied or the interested shareholder owns 80% or more of the Company. This voting requirement is in addition to any other voting requirement under the PBCL, the Articles or the Bylaws.

Under Subchapter 25E of the PBCL, if any person or group acting in concert acquires voting power over shares representing 20% or more of the votes which all of the Company's shareholders would be entitled to cast in an election of directors, any other shareholder may demand that such person or group purchase such shareholder's shares at a price determined in an appraisal proceeding.

Under Subchapter 25F of the PBCL, the Company may not engage in a merger, consolidation, share exchange, division, asset sale, disposition (in one transaction or a series of transactions) or a variety of other business combination transactions with a person who becomes the beneficial owner of shares representing 20% or more of the voting power in an election of the Company's directors unless: (1) the business combination or the acquisition of the 20% interest is approved by the Company Board prior to the date the 20% interest is acquired; (2) the person beneficially owns at least 80% of the Company's outstanding shares and the business combination (a) is approved by a majority vote of the disinterested shareholders and (b) satisfies certain minimum price and other conditions prescribed in Subchapter 25F; (3) the business combination is approved by a majority vote of the disinterested shareholders at a meeting called no earlier than five years after the date the 20% interest is acquired; or (4) the business combination (a) is approved by shareholder vote at a meeting called no earlier than five years after the date the 20% interest is acquired and (b) satisfies certain minimum price and other conditions prescribed in Subchapter 25F.

The Company has opted out of Subchapter 25G of the PBCL (which would have required a shareholder vote to accord voting rights to control shares acquired by a 20% shareholder in a control-share acquisition) and Subchapter 25H of the PBCL (which would have required a person or group to disgorge to the Company any profits received from a sale of the Company's equity securities under certain circumstances).

Advance Notice Requirements

The Company Bylaws require the Company shareholders to provide advance notice if they wish to submit a proposal or nominate candidates for director at the Company's annual meeting of shareholders. These procedures provide that notice of shareholder proposals and shareholder nominations for the election of directors at the Company's annual meeting must be in writing and received by the Company's secretary at its principal executive offices at least 90, but not more than 120, days prior to the anniversary of the date of the prior year's annual meeting of shareholders. In the case of a shareholder nomination, the notice submitted to the secretary must set forth information about the nominee and any person or entity on whose behalf the nomination is made and be accompanied by an executed written representation and agreement that includes an original irrevocable conditional resignation in the event that such nominee, in an uncontested election, receives more votes “against” than “for” election.

The Company Bylaws provide that the Company will include in its proxy materials for an annual meeting of shareholders the name, together with the Required Information (as defined in the Company Bylaws), of any person properly nominated for election to the Company Board by a shareholder or group of shareholders that satisfy the requirements of the Company Bylaws, including qualifying as an Eligible Shareholder (as defined in the Company Bylaws) if such Eligible Shareholder, among other things, provides advance notice to the Company in which the Eligible Shareholder expressly elects to have its nominee included in the proxy materials. The notice must be delivered to the principal executive offices of the Company at least 120, but not more than 150, days prior to the anniversary of the date that the prior year's proxy materials for the annual meeting of shareholders were mailed. As

more fully described in the Company Bylaws, the number of shareholder nominees included in the Company's proxy materials may be the greater of (i) two and (ii) the largest whole number that does not exceed 20% of the number of directors in office on the last day on which the advance notice may be delivered. Shareholders will not be Eligible Shareholders able to take advantage of this provision of the Company Bylaws until our annual meeting of shareholders in 2022, which is three years after the date of our separation from our former parent company.

Special Meetings of Shareholders

The Company Bylaws provide that a special meeting of shareholders may be called by the Company Board or chief executive officer. The Company shareholders do not have a right to call a special meeting under the Company Bylaws or under the PBCL.

Special Treatment for Specified Groups of Nonconsenting Shareholders

Additionally, the PBCL permits an amendment of a corporation's articles of incorporation or other corporate action, if approved by shareholders generally, to provide mandatory special treatment for specified groups of nonconsenting shareholders of the same class by providing, for example, that shares of common stock held only by designated shareholders of record, and no other shares of common stock, shall be cashed out at a price determined by the corporation, subject to applicable dissenters' rights.

Exercise of Director Powers Generally

Section 1715 of the PBCL also provides that the directors of a corporation are not required to regard the interests of the shareholders as being dominant or controlling in making decisions concerning takeovers or any other matters. The directors may consider, to the extent they deem appropriate, among other things, (1) the effects of any proposed action upon any or all groups affected by the action, including, among others, shareholders, employees, creditors, customers and suppliers, (2) the short-term and long-term interests of the corporation, (3) the resources, intent and conduct of any person or group seeking to acquire control of the corporation and (4) all other pertinent factors. The PBCL expressly provides that directors do not violate their fiduciary duties solely by relying on “poison pills” or the anti-takeover provisions of the PBCL. The Company does not currently have a “poison pill.”

Limitations on Liability, Indemnification of Officers and Directors, and Insurance

The PBCL permits a corporation to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation), by reason of the fact that he is or was a representative of the corporation, against expenses (including attorney's fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by him in connection with the action or proceeding if he acted in good faith and in a manner he reasonably believed to be in, or not opposed to, the best interests of the corporation, and with respect to any criminal proceeding, had no reasonable cause to believe his or her conduct was unlawful. In an action by or in the right of the corporation, indemnification will not be made in respect of any claim, issue, or matter as to which the person has been adjudged to be liable to the corporation unless the applicable court otherwise determines.

Unless ordered by a court, the determination of whether indemnification is proper in a specific case will be determined by (1) the board of directors by a majority vote of a quorum consisting of directors who were not parties to the action or proceeding; (2) if such a quorum is not obtainable or if obtainable and a majority vote of a quorum of disinterested directors so directs, by independent legal counsel in a written opinion; or (3) by the shareholders.

To the extent that a representative of a business corporation has been successful on the merits or otherwise in defense of a third-party action, derivative action, or corporate action, he or she must be indemnified against expenses (including attorneys' fees) actually and reasonably incurred by such individual in connection therewith.

Pennsylvania law permits a corporation to purchase and maintain insurance for a director or officer against any liability asserted against such individual, and incurred in his or her capacity as a director or officer or arising out of his or her position, whether or not the corporation would have the power to indemnify such individual against such liability under Pennsylvania law.

The Company Articles provide that a director shall, to the maximum extent permitted by Pennsylvania law, have no personal liability for monetary damages for any action taken, or any failure to take any action, as a director unless such director has breached or failed to perform the duties of his or her office under Chapter 17, Subchapter B of the PBCL (or any successor statute relating to directors' standard of care and justifiable reliance), and the breach or failure to perform constitutes self-dealing, willful misconduct or recklessness. The Company Bylaws provide for indemnification for current and former directors and officers serving at the request of the corporation to the fullest extent permitted by Pennsylvania law. The Company Bylaws also permit the advancement of expenses and expressly authorize the Company to carry directors' and officers' insurance to protect itself and its directors and officers against certain liabilities. The Company Bylaws also provide for indemnification of employees and agents of the Company under certain circumstances.

The limitation of liability and indemnification provisions in the Company Articles and the Company Bylaws may discourage shareholders from bringing a lawsuit against directors for breach of their fiduciary duty. These provisions may also have the effect of reducing the likelihood of derivative litigation against the Company's directors and officers, even though such an action, if successful, might otherwise benefit the Company and its shareholders. However, these provisions do not limit or eliminate the Company's rights, or those of any shareholder, to seek nonmonetary relief such as injunction or rescission in the event of a breach of a director's duty of care. The provisions do not alter the liability of directors under the federal securities laws. In addition, your investment may be adversely affected to the extent that, in a class action or direct suit, the Company pays the costs of settlement and damage awards against directors and officers pursuant to these indemnification provisions.

Exclusive Forum

The Company Bylaws provide that, unless the Company otherwise determines, the state and federal courts sitting in the judicial district of the Commonwealth of Pennsylvania, Allegheny County, is the sole and exclusive forum for any derivative action or proceeding brought on behalf of the Company, any action asserting a claim of breach of a fiduciary duty owed by any director or officer or other employee of the Company to the Company or the Company shareholders, any action asserting a claim against the Company or any director, officer or other employee of the Company arising pursuant to any provision of the PBCL or the Company Articles or the Company Bylaws or any action asserting a claim against the Company or any director, officer or other employee of the Company governed by the internal affairs doctrine. The choice of forum provision set forth in the Company Bylaws does not apply to any actions arising under the Securities Act or the Exchange Act.

Authorized but Unissued Shares

Subject to applicable law and stock exchange rules, the Company's authorized but unissued shares of common stock and preferred stock are available for future issuance without your approval. The Company may use additional shares for a variety of purposes, including future public offerings to raise additional capital, to fund acquisitions and as employee compensation. The existence of authorized but unissued shares of common stock and preferred stock could render more difficult or discourage an attempt to obtain control of the Company by means of a proxy contest, tender offer, merger or otherwise.

Exchange Listing

The Company's common stock is listed on the New York Stock Exchange under the ticker symbol ETRN.

Transfer Agent and Registrar

The transfer agent and registrar for the Company's common stock is American Stock Transfer & Trust Company, LLC.

EX-10.4(B)

Exhibit 10.4(b)

SPECIFIC TERMS IN THIS LETTER AGREEMENT HAVE BEEN REDACTED BECAUSE SUCH TERMS ARE BOTH NOT MATERIAL AND ARE OF A TYPE THAT EQUITRANS MIDSTREAM CORPORATION TREATS AS CONFIDENTIAL. THESE REDACTED TERMS HAVE BEEN MARKED IN THIS EXHIBIT AT THE APPROPRIATE PLACE WITH THREE ASTERISKS [***].

December 21, 2020

EQM Olympus Midstream LLC Attn: Mark Griffin

2200 Energy Drive

Canonsburg, PA 15317

Re:    Letter Agreement Regarding Second Amended and Restated Gas Gathering and Compression Agreement

Dear Mark:

This letter agreement (this “Agreement”), is entered into by and between Rice Drilling D LLC, a Delaware limited liability company (“Producer”), and Rice Olympus Midstream LLC, now known as EQM Olympus Midstream LLC, a Delaware limited liability company (“Gatherer”), as of the date set forth above. Each of Producer and Gatherer may be referred to herein as a “Party”, and collectively as the “Parties”. Reference is made to that certain Second Amended and Restated Gas Gathering and Compression Agreement dated as of March 31, 2017 (as amended, the “GGA”), by and between Producer and Gatherer. Capitalized terms used but not defined herein shall have the meanings given to them in the GGA.

The Parties desire to set forth herein, among other things, the adjustment of Maximum Daily Quantity under the GGA for the Contract Year commencing as of December 22, 2020.

For good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound, the Parties agree as follows:

1.Adjustment of Maximum Daily Quantity. Pursuant to Section 3.4 of the GGA, the Parties hereby acknowledge and agree that the aggregate Maximum Daily Quantity for each System Segment for the Contract Year commencing as of December 22, 2020, shall be [***] Dth/Day, which shall be distributed to and among the Delivery Points as set forth on Exhibit A attached hereto and incorporated herein.

2.Leach Xpress Deficiency Fee. Notwithstanding anything in the GGA or this Agreement to the contrary (including, without limitation, the distribution of Maximum Daily Quantity as set forth on Exhibit A of this Agreement), the Parties hereby agree that solely for purposes of calculating the Leach Xpress Deficiency Fee as set forth in Section 5.1(c) of the GGA, the Maximum Daily Quantity allocated to the Leach Xpress Delivery Point as set forth in Section 5.1(c)(i)(A) of the GGA shall be deemed to be [***] Dth.

3.Entire Agreement. This Agreement supersedes and replaces all prior agreements, oral, and written between the Parties with respect to the subject matter hereof.

4.Miscellaneous. This Agreement shall be governed by, construed and enforced in accordance with the laws of the Commonwealth of Pennsylvania without regard to choice of law principles. This Agreement may be executed in any number of counterparts, including by electronic signature, each of which shall be considered an original for all purposes, and all of which, when taken together, shall constitute one and the same instrument. Signatures delivered by facsimile or other electronic means shall have the same force and effect as originals. The Parties hereby ratify and confirm the GGA, as amended hereby. Except as

expressly provided herein, the provisions of the GGA shall remain in full force and effect in accordance with their respective terms following the execution of this Agreement. In the event of any conflict or inconsistencies between this Agreement and the GGA, the terms and conditions of this Agreement shall prevail. This Agreement shall be binding on and inure to the benefit of the Parties and their respective successors and assigns. Each provision of this Agreement shall be construed as though all Parties participated equally in the drafting of the same. Consequently, the Parties acknowledge and agree that any rule of construction that a document is to be construed against the drafting Party shall not be applicable to this Agreement. Each Party represents and warrants that it has the full authority and power to enter into this Agreement and the person signing on behalf of each such Party is duly authorized to do so.

[Signatures follow.]

2

IN WITNESS WHEREOF, the Parties, intending to be legally bound hereby, have executed this Agreement to be effective as of the date first set forth above.

EQM OLYMPUS MIDSTREAM LLC

By: /s/ Paul Kress

Name: Paul Kress

Title: VP

RICE DRILLING D LLC

By: /s/ Julian Carrillo

Name: Julian Carrillo

Title: Vice President Production

Signature Page to Letter Agreement

Exhibit A

Maximum Daily Quantity and Allocation to Delivery Points (for Contract Year commencing as of December 22, 2020)

[***]

Exhibit A to Letter Agreement

EX-10.4(D)

Exhibit 10.04(d)

SPECIFIC TERMS IN THIS LETTER AGREEMENT HAVE BEEN REDACTED BECAUSE SUCH TERMS ARE BOTH NOT MATERIAL AND ARE OF A TYPE THAT EQUITRANS MIDSTREAM CORPORATION TREATS AS CONFIDENTIAL. THESE REDACTED TERMS HAVE BEEN MARKED IN THIS EXHIBIT AT THE APPROPRIATE PLACE WITH THREE ASTERISKS [***].

February 1, 2022

Re: Letter Agreement Regarding Second Amended and Restated Gas Gathering and Compression Agreement

Dear Customer:

This letter agreement (this “Agreement”), is entered into by and between Rice Drilling D LLC, a Delaware limited liability company (“Producer”), and Rice Olympus Midstream LLC, now known as EQM Olympus Midstream LLC, a Delaware limited liability company (“Gatherer”), as of the date set forth above. Each of Producer and Gatherer may be referred to herein as a “Party”, and collectively as the “Parties”. Reference is made to that certain Second Amended and Restated Gas Gathering and Compression Agreement dated as of March 31, 2017 (as amended, the “GGA”), by and between Producer and Gatherer. Capitalized terms used but not defined herein shall have the meanings given to them in the GGA.

The Parties desire to set forth herein, among other things, the adjustment of Maximum Daily Quantity under the GGA for the Contract Year commencing as of February 1, 2022.

For good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound, the Parties agree as follows:

1.    Adjustment of Maximum Daily Quantity. Pursuant to Section 3.4 of the GGA, the Parties hereby acknowledge and agree that the aggregate Maximum Daily Quantity for each System Segment for the Contract Year commencing as of February 1, 2022, shall be [***] Dth/Day, which shall be distributed to and among the Delivery Points as set forth on Exhibit A attached hereto and incorporated herein.

2.    Leach Xpress Deficiency Fee. Notwithstanding anything in the GGA or this Agreement to the contrary (including, without limitation, the distribution of Maximum Daily Quantity as set forth on Exhibit A of this Agreement), the Parties hereby agree that solely for purposes of calculating the Leach Xpress Deficiency Fee as set forth in Section 5.1(c) of the GGA, the Maximum Daily Quantity allocated to the Leach Xpress Delivery Point as set forth in Section 5.1(c)(i)(A) of the GGA shall be deemed to be [***] Dth.

3.    Entire Agreement. This Agreement supersedes and replaces all prior agreements, oral, and written between the Parties with respect to the subject matter hereof

4.    Miscellaneous. This Agreement shall be governed by, construed and enforced in accordance with the laws of the Commonwealth of Pennsylvania without regard to choice of law principles. This Agreement may be executed in any number of counterparts, including by electronic signature, each of which shall be considered an original for all purposes, and all of which, when taken together, shall constitute one and the same instrument. Signatures delivered by facsimile or other electronic means shall have the same force and effect as originals. The Parties hereby ratify and confirm the GGA, as amended hereby. Except as expressly provided herein, the provisions of the GGA shall remain in full force and effect in accordance with their respective terms following the execution of this Agreement. In the event of any conflict or inconsistencies between this Agreement and the GGA, the terms and conditions of this Agreement shall prevail. This

Agreement shall be binding on and inure to the benefit of the Parties and their respective successors and assigns. Each provision of this Agreement shall be construed as though all Parties participated equally in the drafting of the same. Consequently, the Parties acknowledge and agree that any rule of construction that a document is to be construed against the drafting Party shall not be applicable to this Agreement.

Each Party represents and warrants that it has the full authority and power to enter into this Agreement and the person signing on behalf of each such Party is duly authorized to do so.

[Signatures follow.]

IN WITNESS WHEREOF, the Parties, intending to be legally bound hereby, have executed this Agreement to be effective as of the date first set forth above.

EQM OLYMPUS MIDSTREAM LLC

By:     /s/ John M. Quinn            

Name:     John M. Quinn                

Title:     VP Business Development & Commercial Services

Date:     2/8/2022                

RICE DRILLING D LLC

By:     /s/ J.E.B. Bolen                

Name:     J.E.B. Bolen                

Title:     VP Ops Planning            

Date:     2/4/2022                

Exhibit A

Maximum Daily Quantity and Allocation to Delivery Points

(for Contract Year commencing as of February 1, 2022)

[***]

Exhibit A to Letter Agreement

EX-10.10(A)

Exhibit 10.10(a)

EQUITRANS, L.P.TRANSPORTATION SERVICE AGREEMENTAPPLICABLE TO FIRM TRANSPORTATIONSERVICE UNDER RATE SCHEDULE FTSContract No. EQTR20242-852Dated September 24, 2014

This Agreement is entered into by and between Equitrans, L.P. (“Equitrans”) and EQT ENERGY, LLC (“Customer”).

1.Agreement (CHECK ONE) ___ This is a new Agreement. _X_ This Agreement supersedes, terminates, and cancels Contract No. EQTR18679-852, dated December 20, 2013. The superseded contract is no longer in effect.

2. Service under this Agreement is provided pursuant to Subpart B or Subpart G of Part 284, Title 18, of the Code of Federal Regulations. Service under this Agreement is in all respects subject to and governed by the applicable Rate Schedule and the General Terms and Conditions of the Equitrans FERC Gas Tariff (“Tariff”) as they may be modified from time to time, and such are incorporated by reference. In the event that language of this Agreement or any Exhibit conflicts with Equitrans’ Tariff, the language of the Tariff will control.

3. Equitrans shall have the unilateral right to file with the Commission or other appropriate regulatory authority, in accordance with Section 4 of the Natural Gas Act, changes in Equitrans’ Tariff, including both the level and design of rates, charges, Retainage Factors and services, and the General Terms and Conditions.

4. Customer’s Maximum Daily Quantity (“MDQ”) of natural gas transported under this Agreement shall be the MDQ stated in Exhibit A to this Agreement. If service under this Agreement is associated with a firm storage agreement, Customer's Base MDQ and Winter MDQ are stated in Alternative Exhibit A.

5. The effective date, term and associated notice and renewal provisions of this Agreement are stated in Exhibit A to this Agreement.

6. The Receipt and Delivery Points are stated in Exhibit A to this Agreement.

7. Customer shall pay Equitrans the maximum applicable rate (including all other applicable charges and Retainage Factors authorized pursuant to Rate Schedule FTS and the Tariff) for services rendered under this Agreement, unless Customer and Equitrans execute Optional Exhibit B (Discounted Rate Agreement) or Optional Exhibit C (Negotiated Rate Agreement).

8. Exhibits are incorporated by reference into this Agreement upon their execution. Customer and Equitrans may amend any attached Exhibit by mutual agreement, which amendments shall be reflected in a revised Exhibit, and shall be incorporated by reference as part of this Agreement.

        Contract #EQTR20242

        Page 1 of 10

IN WITNESS WHEREOF, Customer and Equitrans have executed this Agreement by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By /s/ Paul Kress 9/30/2014	By /s/ Andrew Murphy 9/30/2014
(Date)	(Date)
Title VP	Title Vice President

        Contract #EQTR20242

        Page 2 of 10

EXHIBIT Ato theTRANSPORTATION SERVICE AGREEMENTbetween EQUITRANS, L.P.

andEQT ENERGY LLC,
pursuant to Rate Schedule FTS
Contract No. 852 Dated 09/24/2014

Date of this Exhibit A: 8/12/2020

Effective Date of this Exhibit A: 9/1/2020

Supersedes Exhibit A Dated: 12/01/2017

1. Notices and Correspondence shall be sent to:

Equitrans, L.P. 2200 Energy Drive Canonsburg, PA 15317 Attn: Gas Transportation Dept. Phone: (412) 395-3230     E-mail Address: TransportationServices@equitransmidstream.comEQT ENERGY LLC

Address:
625 Liberty Avenue, Suite 1700
Pittsburgh, PA 15222

    Representative: EQT Energy Scheduling Phone: 412-395-2609 E-mail Address: EEScheduling@eqt.com DUNS: 03-585-8708 Federal Tax I.D. No.: 02-0750473 Other contact information if applicable:

        Contract #CW2286396-852

        Page 1 of 4

2. Service Under this Agreement is provided on:

X	Mainline System (includes the Sunrise Transmission System and the Ohio
	Valley Connector)
	Allegheny Valley Connector

3.Maximum Daily Quantity (MDQ):

Base MDQ (Dth)	Winter MDQ (Dth)	Effective Date
1,035,000	1,035,000	9/1/2020
630,000	630,000	07/01/2023
325,000	325,000	09/01/2023
30,000	30,000	10/01/2024

4. Primary Receipt and Delivery Point(s)

Primary Receipt Point(s)**	Base	Winter	Effective
(Meter No. and/or Meter Name)	MDQ Allocation	MDQ Allocation	Date
11795 – Jupiter	270,000 dth	270,000 dth	9/1/2020
17112 – Callisto	225,000 dth	225,000 dth	9/1/2020
24605 - Mobley	499,990 dth	499,990 dth	9/1/2020
24990 – Pluto	10,000 dth	10,000 dth	9/1/2020
5100017 – Mercury	10 dth	10 dth	9/1/2020
5100080 - Applegate	30,000 dth	30,000 dth	9/1/2020
24605 - Mobley	499,990 dth	499,990 dth	7/1/2023
5100017 – Mercury	10 dth	10 dth	7/1/2023
11795 – Jupiter	100,000 dth	100,000 dth	7/1/2023
5100080 - Applegate	30,000 dth	30,000 dth	7/1/2023
24605 - Mobley	195,000 dth	195,000 dth	9/1/2023
11795 – Jupiter	100,000 dth	100,000 dth	9/1/2023
5100080 - Applegate	30,000 dth	30,000 dth	9/1/2023
5100080 - Applegate	30,000 dth	30,000 dth	10/1/2024

** Receipt point MDQs do not include quantities required for retainage.

        Contract #CW2286396-852

        Page 2 of 4

Primary Delivery Point(s)	Base	Winter	Effective
(Meter No. and/or Meter Name)	MDQ Allocation	MDQ Allocation	Date
73705 – TETCO Morris II	225,000 dth	225,000 dth	9/1/2020
24438 – TCO Pickenpaw	50,000 dth	50,000 dth	9/1/2020
73713 – TETCO Jefferson	530,000 dth	530,000 dth	9/1/2020
11027 - DTI Pratt II	230,000 dth	230,000 dth	9/1/2020
73713 - TETCO Jefferson	550, 000 dth	550, 000 dth	7/1/2023
11027 - DTI Pratt II	30,000 dth	30,000 dth	7/1/2023
24438 – TCO Pickenpaw	50,000 dth	50,000 dth	7/1/2023
73713 - TETCO Jefferson	245, 000 dth	245, 000 dth	9/1/2023
11027 - DTI Pratt II	30,000 dth	30,000 dth	9/1/2023
24438 – TCO Pickenpaw	50,000 dth	50,000 dth	9/1/2023
11027 - DTI Pratt II	30,000 dth	30,000 dth	10/1/2024

5. Effective Date and Term: This Exhibit A is effective 9/1/2020and continues in full force and effect through 10/31/2024. * For agreements twelve (12) months or longer Customer and/or Equitransmay terminate the agreement at the end of the primary term by providing at least six (6) months prior written notice of such intent to terminate.

At the expiration of the primary term, this Exhibit A has the following renewal term (choose one): ____ no renewal term ____ through _______________* ____ for a period of _______________* _X__ year to year* (subject to termination on six (6) months prior written notice) ____ month to month (subject to termination by either party upon ___ days written notice prior to contract expiration) ____ other (described in section 6 below)

* In accordance with Section 6.28 of the General Terms and Conditions, a right of first refusal may apply; any contractual right of first refusal will be set forth in Section 6 of this Exhibit A.

6. Other Special Provisions:

None.

        Contract #CW2286396-852

        Page 3 of 4

IN WITNESS WHEREOF, Customer and Equitrans have executed this Exhibit A by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By /s/ Keith Shoemaker 8/27/2020	By /s/ Paul Kress 8/28/2020
Keith Shoemaker (Date)	Paul Kress (Date)
Title SVP Commercial	Title Vice President, Business Development

        Contract #CW2286396-852

        Page 4 of 4

OPTIONAL EXHIBIT Cto theTRANSPORTATION SERVICE AGREEMENTbetween EQUITRANS, L.P.

And

EQT ENERGY LLC,pursuant to Rate Schedule FTS
Contract No. CW2270458-852 Dated 9/24/2014

This Exhibit C is dated 04/1/2019. Any previously executed Exhibit C under this Agreement is terminated and is no longer in effect.

Negotiated Rate Agreement

1.In accordance with Section 6.30 of the General Terms and Conditions of Equitrans’ Tariff, Equitrans and Customer agree that the following negotiated rate provisions will apply under the Agreement:

Rates Effective April 1, 2019 through June 30, 2023
Monthly Reservation Rate	9.133 per Dth
Commodity Rate	$0.00 per Dth
Authorized Overrun Rate	$0.25 per Dth
Customer shall pay the applicable FERC ACA surcharge.
Rates Effective July 1, 2023 through August 31, 2023
Monthly Reservation Rate	$8.782 per MDQ
Commodity Rate	$0.00 per Dth
Authorized Overrun Rate	$0.25 per Dth
Customer shall pay the applicable FERC ACA surcharge.
Rates Effective September 1, 2023 through October 31, 2024
Monthly Reservation Rate	$7.604 per MDQ
Commodity Rate	$0.00 per Dth
Authorized Overrun Rate	$0.25 per Dth
Customer shall pay the applicable FERC ACA surcharge.

In addition, Customer shall pay the fuel usage, lost and unaccounted for gas percentage retainage factor to recover actual fuel usage, lost and unaccounted for gas based on the following calculation. 

        Contract # CW2270458-852

        Page 1 of 3

Equitrans will initially retain 0.42% of Customer’s nominated receipts volumes to recover fuel, lost and unaccounted for gas.  Equitrans will track the actual experienced fuel and lost and unaccounted for gas experienced to provide transportation service on the Mainline System.  Equitrans will account for the under or over recovered fuel and lost and unaccounted for gas associated with this Agreement in FERC Account 186.  Beginning with the Effective Date, Equitrans shall adjust the Retainage Factor from time to time, but at least on an annual basis, to more accurately reflect actual experienced fuel and lost and unaccounted for gas; however, in no event will the Retainage Factor be less than zero.  Equitrans shall file with the Commission for approval to adjust the Retainage Factor to reflect changes in the actual experienced fuel and unaccounted for gas on the Mainline System.  The resulting Retainage Factor shall be effective until the effective date of Equitrans’ next succeeding filing to update the Retainage Factor for this Agreement.The retainage rates to recover actual fuel and lost and unaccounted for gas will only apply to nominations to off-system interstate pipeline interconnects. Any nominations to other points will be subject to the posted Tariff Retainage Rates and the Pipeline Safety Cost Rate.Shipper shall also be subject to any FERC mandated surcharges, imposed by FERC on an industry wide and generally applicable basis to shippers on interstate pipelines. Transporter shall assess the impact of any such FERC proposed surcharge on its Shippers and use commercially reasonable efforts to minimize the application or impact of such surcharge on Transporter’s Shippers, provided that such efforts by Transporter shall not include any obligation on or risk to Transporter of cost responsibility for such surcharge.

Except as expressly stated herein, Equitrans’ applicable maximum rates and charges set forth in the Statement of Rates of its Tariff continue to apply.

2. Customer acknowledges that it is electing Negotiated Rates as an alternative to the rates and charges set forth in the Statement of Rates of Equitrans’ Tariff applicable to Rate Schedule FTS, as revised from time to time.

3. This Exhibit C is effective 4/1/2019 and continues in effect through 10/31/2024.

4. In the event any provision of this Exhibit C is held to be invalid, illegal or unenforceable by any court, regulatory agency, or tribunal of competent jurisdiction, the validity, legality, and enforceability of the remaining provisions, terms or conditions shall not in any way be affected or impaired thereby, and the term, condition, or provision which is held illegal or invalid shall be deemed modified to conform to such rule of law, but only for the period of time such order, rule, regulation, or law is in effect.

5. Other Special Provisions: None.

IN WITNESS WHEREOF, Customer and Equitrans have executed this Exhibit C by their duly authorized officers, effective as of the date indicated above.

        Contract # CW2270458-852

        Page 2 of 3

CUSTOMER:	EQUITRANS, L.P.:
By /s/ Donald M. Jenkins 3/20/2019	By /s/ Cliff Baker 3/26/2019
(Date)	(Date)
Title President	Title SVP Commercial Dev. & Ops

        Contract # CW2270458-852

        Page 3 of 3

EX-10.10(B)

Exhibit 10.10(b)

EQUITRANS, L.P.TRANSPORTATION SERVICE AGREEMENTAPPLICABLE TO FIRM TRANSPORTATIONSERVICE UNDER RATE SCHEDULE FTSContract No. EQTR20242-852Dated September 24, 2014

This Agreement is entered into by and between Equitrans, L.P. (“Equitrans”) and EQT ENERGY, LLC (“Customer”).

1.Agreement (CHECK ONE) ___ This is a new Agreement. _X_ This Agreement supersedes, terminates, and cancels Contract No. EQTR18679-852, dated December 20, 2013. The superseded contract is no longer in effect.

2. Service under this Agreement is provided pursuant to Subpart B or Subpart G of Part 284, Title 18, of the Code of Federal Regulations. Service under this Agreement is in all respects subject to and governed by the applicable Rate Schedule and the General Terms and Conditions of the Equitrans FERC Gas Tariff (“Tariff”) as they may be modified from time to time, and such are incorporated by reference. In the event that language of this Agreement or any Exhibit conflicts with Equitrans’ Tariff, the language of the Tariff will control.

3. Equitrans shall have the unilateral right to file with the Commission or other appropriate regulatory authority, in accordance with Section 4 of the Natural Gas Act, changes in Equitrans’ Tariff, including both the level and design of rates, charges, Retainage Factors and services, and the General Terms and Conditions.

4. Customer’s Maximum Daily Quantity (“MDQ”) of natural gas transported under this Agreement shall be the MDQ stated in Exhibit A to this Agreement. If service under this Agreement is associated with a firm storage agreement, Customer's Base MDQ and Winter MDQ are stated in Alternative Exhibit A.

5. The effective date, term and associated notice and renewal provisions of this Agreement are stated in Exhibit A to this Agreement.

6. The Receipt and Delivery Points are stated in Exhibit A to this Agreement.

7. Customer shall pay Equitrans the maximum applicable rate (including all other applicable charges and Retainage Factors authorized pursuant to Rate Schedule FTS and the Tariff) for services rendered under this Agreement, unless Customer and Equitrans execute Optional Exhibit B (Discounted Rate Agreement) or Optional Exhibit C (Negotiated Rate Agreement).

8. Exhibits are incorporated by reference into this Agreement upon their execution. Customer and Equitrans may amend any attached Exhibit by mutual agreement, which amendments shall be reflected in a revised Exhibit, and shall be incorporated by reference as part of this Agreement.

        Contract #EQTR20242

        Page1 of 10

IN WITNESS WHEREOF, Customer and Equitrans have executed this Agreement by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By /s/ Paul Kress 9-30-2014	By /s/ Andrew Murphy 9-30-2014
(Date)	(Date)
Title VP	Title Vice President

        Contract #EQTR20242

        Page2 of 10

EXHIBIT Ato theTRANSPORTATION SERVICE AGREEMENTbetween EQUITRANS, L.P.andEQT ENERGY, LLC,

pursuant to Rate Schedule FTSContract No. 852 Dated 09/24/2014Date of this Exhibit A: 12/ 6 /2021

Effective Date of this Exhibit A: 1/1/2022

Supersedes Exhibit A Dated: 8/12/2020

1. Notices and Correspondence shall be sent to:

Equitrans, L.P. 2200 Energy Drive Canonsburg, PA 15317 Attn: Gas Transportation Dept. Phone: (412) 395-3230 E-mail Address: TransportationServices@equitransmidstream.comEQT ENERGY, LLC Address: 625 Liberty Avenue Suite 1700

        Pittsburgh, PA 15222 Representative: EQT Energy Scheduling Phone: 412-395-2609 E-mail Address: EEScheduling@eqt.com DUNS: 03-585-8708 Federal Tax I.D. No.: 02-0750473 Other contact information if applicable:

2. Service Under this Agreement is provided on:

X	Mainline System (includes the Sunrise Transmission System and the Ohio Valley Connector)
	Allegheny Valley Connector

3.Maximum Daily Quantity (MDQ):

Base MDQ (Dth)	Winter MDQ (Dth)	Effective Date
1,035,000	1,035,000	1/1/2022

4. Primary Receipt and Delivery Point(s)

Primary Receipt Point(s)**	Base	Winter	Effective
(Meter No. and/or Meter Name)	MDQ Allocation	MDQ Allocation	Date
24605 – Mobley	40,000 dth	40,000 dth	1/1/2022
M5259543 – McIntosh	100,000 dth	100,000 dth	1/1/2022
17172 – Hopewell Ridge	125,000 dth	125,000 dth	1/1/2022
17112 – Callisto	300,000 dth	300,000 dth	1/1/2022
M5414023 – Flower	80,000 dth	80,000 dth	1/1/2022
M5414021 – Bowlby	80,000 dth	80,000 dth	1/1/2022
11795 – Jupiter	270,000 dth	270,000 dth	1/1/2022
M5424301 – White’s Ridge	40,000 dth	40,000 dth	1/1/2022

** Receipt point MDQs do not include quantities required for retainage.

Primary Delivery Point(s)	Base	Winter	Effective
(Meter No. and/or Meter Name)	MDQ Allocation	MDQ Allocation	Date
11027 – Pratt to DTI	230,000 dth	230,000 dth	1/1/2022
73705 – Morris 2	425,000 dth	425,000 dth	1/1/2022
73713 – Jefferson	330,000 dth	330,000 dth	1/1/2022
24438 – Pickenpaw to TCO	50,000 dth	50,000 dth	1/1/2022

5. Effective Date and Term: This Exhibit A is effective 1/1/2022 and continues in full force and effect through the first day of the month immediately following the date on which Equitrans, L.P. is authorized by FERC to commence service on the OVCX Project (“OVCX In-Service Date”).* For agreements twelve (12) months or longer, Customer and/or Equitrans may terminate the agreement at the end of the primary term by providing at least six (6) months prior written notice of such intent to terminate.

At the expiration of the primary term, this Exhibit A has the following renewal term (choose one): _X___ no renewal term ____ through _______________ * ____ for a period of _______________ * ____ year to year* (subject to termination on six (6) months prior written notice) ____ month to month (subject to termination by either party upon ___ days written notice prior to contract expiration) ____ other (described in section 6 below)

* In accordance with Section 6.28 of the General Terms and Conditions, a right of first refusal may apply; any contractual right of first refusal will be set forth in Section 6 of this Exhibit A.

6. Other Special Provisions:

None.

IN WITNESS WHEREOF, Customer and Equitrans have executed this Exhibit A by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By /s/Keith Shoemaker 12/4/2021	By /s/Diana M. Charletta 12/6/2021
Keith Shoemaker (Date)	Diana M. Charletta    (Date)
Title: Senior Vice President, Commercial EQT Energy, LLC	Title: President and Chief Operating Officer

DocuSign Envelope ID: 8A6DD319-322F-418A-B00C-1F74C03D204C

OPTIONAL EXHIBIT C

to the TRANSPORTATION SERVICE AGREEMENT

between EQUITRANS, L.P.

and

EQT ENERGY, LLC,

pursuant to Rate Schedule FTS Contract No. 852 Dated 9/24/2014

Date of this Exhibit C: 12/ 6 /2021

Effective Date of this Exhibit C: 1/1/2022

Supersedes Exhibit C Dated: 04/01/2019

Negotiated Rate Agreement

1.In accordance with Section 6.30 of the General Terms and Conditions of Equitrans’ Tariff, Equitrans and Customer agree that the following negotiated rate provisions will apply under the Agreement:

Monthly Reservation Rate    9.133 per Dth

Commodity Rate    $0.00 per Dth

Authorized Overrun Rate    $0.25 per Dth Customer shall pay the applicable FERC ACA surcharge.

In addition, Customer shall pay the fuel usage, lost and unaccounted for gas percentage retainage factor to recover actual fuel usage, lost and unaccounted for gas based on the following calculation. Equitrans will initially retain 0.63% of Customer’s nominated receipts volumes to recover fuel, lost and unaccounted for gas. Equitrans will track the actual experienced fuel and lost and unaccounted for gas experienced to provide transportation service on the Mainline

System. Equitrans will account for the under or over recovered fuel and lost and unaccounted for gas associated with this Agreement in FERC Account 186. Beginning with the Effective Date, Equitrans shall adjust the Retainage Factor from time to time, but at least on an annual basis, to more accurately reflect actual experienced fuel and lost and unaccounted for gas; however, in no event will the Retainage Factor be less than zero. Equitrans shall file with the Commission for approval to adjust the Retainage Factor to reflect changes in the actual experienced fuel and unaccounted for gas on the Mainline System. The resulting Retainage Factor shall be effective until the effective date of Equitrans’ next succeeding filing to update the Retainage Factor for this Agreement.

The negotiated rates including the retainage rates to recover actual fuel and lost and unaccounted for gas will only apply to nominations to off-system interstate pipeline interconnects. Any nominations to other points will be subject to the posted Tariff Retainage Rates and the Pipeline Safety Cost Rate.

Shipper shall also be subject to any FERC mandated surcharges, imposed by FERC on an industry

wide and generally applicable basis to shippers on interstate pipelines. Transporter shall assess the impact of any such FERC proposed surcharge on its Shippers and use commercially reasonable efforts to minimize the application or impact of such surcharge on Transporter’s Shippers, provided that such efforts by Transporter shall not include any obligation on or risk to Transporter of cost responsibility for such surcharge.

Page 1 of 2

DocuSign Envelope ID: 8A6DD319-322F-418A-B00C-1F74C03D204C

Except as expressly stated herein, Equitrans’ applicable maximum rates and charges set forth in the Statement of Rates of its Tariff continue to apply.

2.Customer acknowledges that it is electing Negotiated Rates as an alternative to the rates and charges set forth in the Statement of Rates of Equitrans’ Tariff applicable to Rate Schedule FTS, as revised from time to time.

3.This Exhibit C is effective 1/1/2022 and continues in full force and effect through the first day of

    the month immediately following the date on which Equitrans, L.P. is authorized by FERC to

    commence service on the OVCX Project (“OVCX In-Service Date”).

4.In the event any provision of this Exhibit C is held to be invalid, illegal or unenforceable by any court, regulatory agency, or tribunal of competent jurisdiction, the validity, legality, and enforceability of the remaining provisions, terms or conditions shall not in any way be affected or impaired thereby, and the term, condition, or provision which is held illegal or invalid shall be deemed modified to conform to such rule of law, but only for the period of time such order, rule, regulation, or law is in effect.

5.Other Special Provisions:

None.

IN WITNESS WHEREOF, Customer and Equitrans have executed this Exhibit C by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By /s/Keith Shoemaker 12/4/2021	By /s/Diana M. Charletta 12/6/2021
Keith Shoemaker (Date)	Diana M. Charletta    (Date)
Title: Senior Vice President, Commercial EQT Energy, LLC	Title: President and Chief Operating Officer

Page 1 of 2

EX-10.10(C)

Exhibit 10.10(c)

EQUITRANS, L.P.TRANSPORTATION SERVICE AGREEMENTAPPLICABLE TO FIRM TRANSPORTATIONSERVICE UNDER RATE SCHEDULE FTSContract No. EQTR20242-852Dated September 24, 2014

This Agreement is entered into by and between Equitrans, L.P. (“Equitrans”) and EQT ENERGY, LLC (“Customer”).

1.Agreement (CHECK ONE) ___ This is a new Agreement. _X_ This Agreement supersedes, terminates, and cancels Contract No. EQTR18679-852, dated December 20, 2013. The superseded contract is no longer in effect.

2. Service under this Agreement is provided pursuant to Subpart B or Subpart G of Part 284, Title 18, of the Code of Federal Regulations. Service under this Agreement is in all respects subject to and governed by the applicable Rate Schedule and the General Terms and Conditions of the Equitrans FERC Gas Tariff (“Tariff”) as they may be modified from time to time, and such are incorporated by reference. In the event that language of this Agreement or any Exhibit conflicts with Equitrans’ Tariff, the language of the Tariff will control.

3. Equitrans shall have the unilateral right to file with the Commission or other appropriate regulatory authority, in accordance with Section 4 of the Natural Gas Act, changes in Equitrans’ Tariff, including both the level and design of rates, charges, Retainage Factors and services, and the General Terms and Conditions.

4. Customer’s Maximum Daily Quantity (“MDQ”) of natural gas transported under this Agreement shall be the MDQ stated in Exhibit A to this Agreement. If service under this Agreement is associated with a firm storage agreement, Customer's Base MDQ and Winter MDQ are stated in Alternative Exhibit A.

5. The effective date, term and associated notice and renewal provisions of this Agreement are stated in Exhibit A to this Agreement.

6. The Receipt and Delivery Points are stated in Exhibit A to this Agreement.

7. Customer shall pay Equitrans the maximum applicable rate (including all other applicable charges and Retainage Factors authorized pursuant to Rate Schedule FTS and the Tariff) for services rendered under this Agreement, unless Customer and Equitrans execute Optional Exhibit B (Discounted Rate Agreement) or Optional Exhibit C (Negotiated Rate Agreement).

8. Exhibits are incorporated by reference into this Agreement upon their execution. Customer and Equitrans may amend any attached Exhibit by mutual agreement, which amendments shall be reflected in a revised Exhibit, and shall be incorporated by reference as part of this Agreement.

        Contract #EQTR20242

        Page1 of 10

IN WITNESS WHEREOF, Customer and Equitrans have executed this Agreement by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By /s/ Paul Kress 9-30-2014	By /s/ Andrew Murphy 9-30-2014
(Date)	(Date)
Title VP	Title Vice President

        Contract #EQTR20242

        Page2 of 10

EXHIBIT Ato theTRANSPORTATION SERVICE AGREEMENTbetween EQUITRANS, L.P.andEQT ENERGY, LLC,

pursuant to Rate Schedule FTSContract No. 852 Dated 09/24/2014Date of this Exhibit A: 12/ 6 /2021

Effective Date of this Exhibit A: OVCX In-Service Date (as defined below)

Supersedes Exhibit A Dated: 12/6/2021 (effective 1/1/2022)

1. Notices and Correspondence shall be sent to:

Equitrans, L.P. 2200 Energy Drive Canonsburg, PA 15317 Attn: Gas Transportation Dept. Phone: (412) 395-3230 E-mail Address: TransportationServices@equitransmidstream.comEQT ENERGY, LLC Address: 625 Liberty Avenue Suite 1700

        Pittsburgh, PA 152222 Representative: EQT Energy Scheduling Phone: 412-395-2609 E-mail Address: EEScheduling@eqt.com DUNS: 03-585-8708 Federal Tax I.D. No.: 02-0750473 Other contact information if applicable:

2. Service Under this Agreement is provided on:

X	Mainline System (includes the Sunrise Transmission System and the Ohio Valley Connector)
	Allegheny Valley Connector

3.Maximum Daily Quantity (MDQ):

Base MDQ (Dth)	Winter MDQ (Dth)	Effective Date
1,035,000	1,035,000	OVCX In-Service Date (as defined below)

4. Primary Receipt and Delivery Point(s)

Primary Receipt Point(s)**	Base		Winter		Effective
(Meter No. and/or Meter Name)	MDQ Allocation		MDQ Allocation		Date
M5259543 – McIntosh		100,000 dth		100,000 dth		OVCX In-Service Date (as defined below)
17172 – Hopewell Ridge		125,000 dth		125,000 dth		OVCX In-Service Date (as defined below)
17112 – Callisto		300,000 dth		300,000 dth		OVCX In-Service Date (as defined below)
M5440680 – Aurora		110,000 dth		110,000 dth		OVCX In-Service Date (as defined below)
TBD – Beacon H-111 (LP)		50,000 dth		50,000 dth		OVCX In-Service Date (as defined below)
TBD – Beacon H-302 (HP)		250,000 dth		250,000 dth		OVCX In-Service Date (as defined below)
M5414023 – Flower (Polecat)		50,000 dth		50,000 dth		OVCX In-Service Date (as defined below)
M5414021 – Bowlby (Drift Ridge)		50,000 dth		50,000 dth		OVCX In-Service Date (as defined below)

** Receipt point MDQs do not include quantities required for retainage.

Primary Delivery Point(s)	Base	Winter	Effective
(Meter No. and/or Meter Name)	MDQ Allocation	MDQ Allocation	Date
11027 – Pratt to DTI	285,000 dth	285,000 dth	OVCX In-Service Date (as defined below)
73705 – Morris 2	425,000 dth	425,000 dth	OVCX In-Service Date (as defined below)
73713 – Jefferson	275,000 dth	275,000 dth	OVCX In-Service Date (as defined below)

11169 – Rhinehart (To TCO) 50,000 dth 50,000 dth OVCX In-Service Date (as defined below)

5. Effective Date and Term: This Exhibit A is effective the first day of the month immediately following the date on which Equitrans, L.P. is authorized by FERC to commence service on the OVCX Project (“OVCX In-Service Date”), which is anticipated to be October 1, 2023, and continues in full force and effect through 12/31/2030.* For agreements twelve (12) months or longer, Customer and/or Equitrans may terminate the agreement at the end of the primary term by providing at least six (6) months prior written notice of such intent to terminate.

At the expiration of the primary term, this Exhibit A has the following renewal term (choose one): __X_ no renewal term ____ through _______________ * ____ for a period of _______________ * ___ year to year* (subject to termination on six (6) months prior written notice) ____ month to month (subject to termination by either party upon ___ days written notice prior to contract expiration) ____ other (described in section 6 below)

* In accordance with Section 6.28 of the General Terms and Conditions, a right of first refusal may apply; any contractual right of first refusal will be set forth in Section 6 of this Exhibit A.

6. Other Special Provisions:

None.

IN WITNESS WHEREOF, Customer and Equitrans have executed this Exhibit A by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By /s/ Keith Shoemaker 12/4/2021	By /s/ Diana M. Charletta 12/6/2021
Keith Shoemaker (Date)	Diana M. Charletta    (Date)
Title: Senior Vice President, Commercial EQT Energy, LLC	Title: President and Chief Operating Officer

852(2)

OPTIONAL EXHIBIT Cto theTRANSPORTATION SERVICE AGREEMENTbetween EQUITRANS, L.P.and EQT ENERGY, LLC,pursuant to Rate Schedule FTSContract No. 852 Dated 9/24/2014Date of this Exhibit C: 12/ 6 /2021

Effective Date of this Exhibit C: OVCX In-Service Date (as defined below)

Supersedes Exhibit C Dated: 12/6/2021 (effective 1/1/2022)

Negotiated Rate Agreement

1. In accordance with Section 6.30 of the General Terms and Conditions of Equitrans’ Tariff, Equitrans and Customer agree that the following negotiated rate provisions will apply under the Agreement:

Monthly Reservation Rate	9.133 per Dth
Commodity Rate	$0.00 per Dth
Authorized Overrun Rate	$0.25 per Dth
Customer shall pay the applicable FERC ACA surcharge.

In addition, Customer shall pay the fuel usage, lost and unaccounted for gas percentage retainage factor to recover actual fuel usage, lost and unaccounted for gas based on the following calculation. Equitrans will initially retain 0.53522% of Customer’s nominated receipts volumes to recover fuel, lost and unaccounted for gas. Equitrans will track the actual experienced fuel and lost and unaccounted for gas experienced to provide transportation service on the Mainline System. Equitrans will account for the under or over recovered fuel and lost and unaccounted for gas associated with this Agreement in FERC Account 186. Beginning with the Effective Date, Equitrans shall adjust the Retainage Factor from time to time, but at least on an annual basis, to more accurately reflect actual experienced fuel and lost and unaccounted for gas; however, in no event will the Retainage Factor be less than zero. Equitrans shall file with the Commission for approval to adjust the Retainage Factor to reflect changes in the actual experienced fuel and unaccounted for gas on the Mainline System. The resulting Retainage Factor shall be effective until the effective date of Equitrans’ next succeeding filing to update the Retainage Factor for this Agreement. The Rates and Retainage Factor will be considered negotiated rates, subject to FERC’s negotiated rate policies, and will only apply to nominations on Equitrans’ System from Aurora Receipt Point (Meter# M5440680), Beacon H-111 (LP) Receipt Point (Meter# TBD), Beacon H-302 (HP) Receipt Point (Meter# TBD), Callisto Receipt Point (Meter# 17112), McIntosh Receipt Point (Meter# M5259543), Hopewell Ridge (Meter# 17172), Flower (Polecat) Receipt Point (Meter# M5414023), Bowlby (Drift Ridge) Receipt Point (Meter# M5414021) to Pratt to DTI Delivery Point (Meter# 11027), Rhinehart to TCO Delivery Point (Meter# 11169), Jefferson Delivery Point (Meter# 73713) or Morris 2 Delivery Point(Meter# 73705).

Shipper shall also be subject to any FERC mandated surcharges, imposed by FERC on an industry wide and generally applicable basis to shippers on interstate pipelines. Transporter

852(2)

shall assess the impact of any such FERC proposed surcharge on its Shippers and use commercially reasonable efforts to minimize the application or impact of such surcharge on Transporter’s Shippers, provided that such efforts by Transporter shall not include any obligation on or risk to Transporter of cost responsibility for such surcharge.

Except as expressly stated herein, Equitrans’ applicable maximum rates and charges set forth in the Statement of Rates of its Tariff continue to apply.

2. Customer acknowledges that it is electing Negotiated Rates as an alternative to the rates and charges set forth in the Statement of Rates of Equitrans’ Tariff applicable to Rate Schedule FTS, as revised from time to time.

3. This Exhibit C is effective the first day of the month immediately following the date on which Equitrans, L.P. is authorized by FERC to commence service on the OVCX Project (“OVCX In-Service Date”) , which is anticipated to be October 1, 2023, and continues in effect through 12/31/2030.

4. In the event any provision of this Exhibit C is held to be invalid, illegal or unenforceable by any court, regulatory agency, or tribunal of competent jurisdiction, the validity, legality, and enforceability of the remaining provisions, terms or conditions shall not in any way be affected or impaired thereby, and the term, condition, or provision which is held illegal or invalid shall be deemed modified to conform to such rule of law, but only for the period of time such order, rule, regulation, or law is in effect.

5. Other Special Provisions: None.

IN WITNESS WHEREOF, Customer and Equitrans have executed this Exhibit C by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By /s/ Keith Shoemaker 12/4/2021	By /s/ Diana M. Charletta 12/6/2021
Keith Shoemaker (Date)	Diana M. Charletta (Date)
Title: Senior Vice President, Commercial EQT Energy, LLC	Title: President and Chief Operating Officer

852(2)

EX-10.11

Exhibit 10.11

EQUITRANS, L.P.TRANSPORTATION SERVICE AGREEMENTAPPLICABLE TO FIRM TRANSPORTATIONSERVICE UNDER RATE SCHEDULE FTSContract No. EQTR19837-1296Dated January 8, 2016

This Agreement is entered into by and between Equitrans, L.P. (“Equitrans”) and EQT ENERGY, LLC (“Customer”).

1.Agreement (CHECK ONE)

_×_ This is a new Agreement.

___ This Agreement supersedes, terminates, and cancels Contract No. __________,

            dated____________. The superseded contract is no longer in effect.

2. Service under this Agreement is provided pursuant to Subpart B or Subpart G of Part 284, Title 18, of the Code of Federal Regulations. Service under this Agreement is in all respects subject to and governed by the applicable Rate Schedule and the General Terms and Conditions of the Equitrans FERC Gas Tariff (“Tariff”) as they may be modified from time to time, and such are incorporated by reference. In the event that language of this Agreement or any Exhibit conflicts with Equitrans’ Tariff, the language of the Tariff will control.

3. Equitrans shall have the unilateral right to file with the Commission or other appropriate regulatory authority, in accordance with Section 4 of the Natural Gas Act, changes in Equitrans’ Tariff, including both the level and design of rates, charges, Retainage Factors and services, and the General Terms and Conditions.

4. Customer’s Maximum Daily Quantity (“MDQ”) of natural gas transported under this Agreement shall be the MDQ stated in Exhibit A to this Agreement. If service under this Agreement is associated with a firm storage agreement, Customer's Base MDQ and Winter MDQ are stated in Alternative Exhibit A.

5. The effective date, term and associated notice and renewal provisions of this Agreement are stated in Exhibit A to this Agreement.

6. The Receipt and Delivery Points are stated in Exhibit A to this Agreement.

7. Customer shall pay Equitrans the maximum applicable rate (including all other

applicable charges and Retainage Factors authorized pursuant to Rate Schedule FTS and

the Tariff) for services rendered under this Agreement, unless Customer and Equitrans

execute Optional Exhibit B (Discounted Rate Agreement) or Optional Exhibit C

(Negotiated Rate Agreement).

8. Exhibits are incorporated by reference into this Agreement upon their execution. Customer and Equitrans may amend any attached Exhibit by mutual agreement, which amendments shall be reflected in a revised Exhibit, and shall be incorporated by reference as part of this Agreement.

EQTR19837-1296

        Page 1 of 13

IN WITNESS WHEREOF, Customer and Equitrans have executed this Agreement by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By /s/ Paul Kress 1/8/2016	By /s/ David Gray 1/18/2016
(Date)	(Date)
Title VP	Title SVP

        EQTR19837-1296

        Page 2 of 13

EXHIBIT A

to the

TRANSPORTATION SERVICE AGREEMENT

between EQUITRANS, L.P.

and

EQT ENERGY, LLC,

pursuant to Rate Schedule FTS

Contract No. 1296 Dated 01/08/2016

Date of this Exhibit A: 12/ 6 /2021

Effective Date of this Exhibit A: 1/1/2022

Supersedes Exhibit A Dated: 1/9/2020

1.Notices and Correspondence shall be sent to:

Equitrans, L.P.

    2200 Energy Drive

    Canonsburg, PA 15317

    Attn: Gas Transportation Dept.

    Phone: (412) 395-3230

    E-mail Address: TransportationServices@equitransmidstream.com

EQT Energy, LLC    

    625 Liberty Avenue

    Pittsburgh, PA 15222

    Representative: Ray Franks

    Phone: (412) 553-5749

    Facsimile: (412) 395-2675

    E-mail Address: rfranks@eqt.com

    DUNS: 03-585-8708

    Federal Tax I.D. No.: 02-0750473

    Other contact information if applicable:

2.Service Under this Agreement is provided on:

X	Mainline System (includes the Sunrise Transmission System and the Ohio
	Valley Connector)
	Allegheny Valley Connector

3.    Maximum Daily Quantity (MDQ):

Base MDQ (Dth)	Winter MDQ (Dth)	Effective Date
650,000	650,000	1/1/2022

4.    Primary Receipt and Delivery Point(s)

Primary Receipt Point(s)**        BaseWinter    Effective

(Meter No. and/or Meter Name)MDQ AllocationMDQ AllocationDate

24605 - Mobley            400,000 Dth        400,000 Dth        1/1/2022

24490 - Pluto                15,000 Dth        15,000 Dth        1/1/2022

24564 – Curry                15,000 Dth        15,000 Dth        1/1/2022

M5259543 - McIntosh        150,000 Dth        150,000 Dth        1/1/2022

M5421825 - Michael Kuhn         70,000 Dth        70,000 Dth        1/1/2022

** Receipt point MDQs do not include quantities required for retainage.

Primary Delivery Point(s)BaseWinter    Effective

(Meter No. and/or Meter Name)MDQ AllocationMDQ AllocationDate

60062D - REX Isaly            500,000 Dth        500,000 Dth        1/1/2022

70007D – Rover Traveler        150,000 Dth        150,000 Dth        1/1/2022

5.     Effective Date and Term: This Exhibit A is effective 1/1/2022 and continues in full force and effect through 9/30/2036.* For agreements twelve (12) months or longer, Customer and/or Equitrans may terminate the agreement at the end of the primary term by providing at least six (6) months prior written notice of such intent to terminate.

At the expiration of the primary term, this Exhibit A has the following renewal term

(choose one):

__X__ no renewal term

____ through _______________ *

____ for a period of _______________ *

____ year to year* (subject to termination on ____months prior written notice)

____ month to month (subject to termination by either party upon ___ days written notice prior to contract expiration)

____ other (described in section 6 below)

* In accordance with Section 6.28 of the General Terms and Conditions, a right of first refusal may apply; any contractual right of first refusal will be set forth in Section 6 of this Exhibit A.

6.     Other Special Provisions:

Any capitalized terms used but not defined herein shall have the meanings ascribed to them in the Precedent Agreement dated July 23, 2014 between the parties.

Customer shall have the right of first refusal with respect to the MDQ at the expiration of the Primary Term, for a renewal term of no less than five years, in accordance with Equitrans’ FERC Gas Tariff.

This Agreement incorporates the Credit Agreement dated July 23, 2014 entered into by and between Equitrans and Customer and any amendments or restatements thereto.

Should Equitrans elect in the future to expand the Ohio Valley Connector or a lateral directly connected to the Ohio Valley Connector on a forward haul basis, Customer shall have a right to participate in that project (“OVC Expansion Project”). Equitrans shall notify Customer prior to holding an Open Season for an OVC Expansion Project. Notwithstanding the foregoing, Customer’s right under this section shall not apply to Equitrans’ separate project to modify, expand, and extend certain of its transmission facilities in order to provide additional firm transportation service from Clarington, Ohio to Lebanon, Ohio and such other locations as Equitrans may determine, which is a separate project and not an OVC Expansion Project, and for which an Open Season has already been held. Equitrans and Customer agree that nothing in this section prohibits Customer from requesting firm capacity on similar proposed projects.    

IN WITNESS WHEREOF, Customer and Equitrans have executed this Exhibit A by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By /s/ Keith Shoemaker    12/4/2021	By /s/ Diana M. Charletta    12/6/2021
Keith Shoemaker (Date)	Diana M. Charletta (Date)
Title: Senior Vice President, Commercial EQT Energy, LLC	Title: President and Chief Operating Officer

1296

OPTIONAL EXHIBIT Cto theTRANSPORTATION SERVICE AGREEMENTbetween EQUITRANS, L.P.

And

EQT ENERGY, LLC,pursuant to Rate Schedule FTS
Contract No.1296 Dated 01/08/2016

Date of this Exhibit C: 12/ 6 /2021

Effective Date of this Exhibit C: 1/1/2022

Supersedes Exhibit C Dated: 1/9/2020

Negotiated Rate Agreement

1. In accordance with Section 6.30 of the General Terms and Conditions of Equitrans’ Tariff, Equitrans and Customer agree that the following negotiated rate provisions will apply under the Agreement:

Negotiated Rates Effective 1/1/2022 – 9/30/2036:

Rates Effective from Mobley Receipt Point (Meter# 24505), Mcintosh Receipt Point (Meter# M5259543), Michael Kuhn Receipt Point (Meter# M5421825), Pluto Receipt Point (Meter# 24490) and Curry (Meter# 24564) to REX Isaly Delivery Point (Meter# 60062D) or Rover Traveler Delivery Point (Meter# 70007D)

    Monthly Reservation Rate    $10.4170 per MDQ

    Commodity Rate        $0.00 per Dth

    Authorized Overrun Rate    $0.3425 per Dth

The negotiated rate will be subject to an annual adjustment (upwards or downwards), to take effect on each anniversary of 10/1/2021, calculated as follows:

OMSGA x (1+D) = ARR, where

OMSGA = The current portion of the Monthly Reservation Rate that accounts for O&M and SG&A

D = the percentage change in the Producer Price Index – Support activities for Oil and Gas Operations (“PPI-Oil and Gas”), as published by the US Department of Labor Bureau of Labor Statistics (“BLS”), from June 1 of the year that is two (2) years immediately prior to the year for which the adjustment is to be effective (the “Adjustment Year”) to June 1 of the year immediately preceding the Adjustment Year, based upon the most recent publication of the PPI-Oil and Gas prior to the end of the year immediately preceding the Adjustment Year for each such date. Any such adjustment (upward or downward) shall be capped at two percent (2%).

ARR = the updated OMSGA to be used in annual adjustments

        Page 1 of 3

In addition to the fixed Monthly Reservation Rate, Customer shall pay (1) the applicable FERC ACA surcharge, and (2) the fuel usage, lost and unaccounted for gas percentage retainage factor to recover actual fuel usage, lost and unaccounted for gas based on the following calculation.  Equitrans will initially retain 0.63% of Customer’s nominated receipts volumes to recover fuel, lost and unaccounted for gas.  Equitrans will track the actual experienced fuel and lost and unaccounted for gas experienced to provide transportation service on the Mainline System.  Equitrans will account for the under or over recovered fuel and lost and unaccounted for gas associated with this Agreement in FERC Account 186.  Beginning with the Effective Date, Equitrans shall adjust the Retainage Factor from time to time, but at least on an annual basis, to more accurately reflect actual experienced fuel and lost and unaccounted for gas; however, in no event will the Retainage Factor be less than zero.  Equitrans shall file with the Commission for approval to adjust the Retainage Factor to reflect changes in the actual experienced fuel and unaccounted for gas on the Mainline System.  The resulting Retainage Factor shall be effective until the effective date of Equitrans’ next succeeding filing to update the Retainage Factor for this Agreement.

The Retainage Factor will be considered a negotiated Rate, subject to FERC’s negotiated rate policies, and will only apply to nominations on Equitrans’ System not involving storage injections and withdrawals or on-system non-interstate pipeline delivery points (each, a “City-Gate Point”). Any storage injection and withdrawal or City-Gate Point nominations will be subject to the posted Tariff Retainage Factors and other applicable surcharges (such as the Pipeline Safety Cost rate). In addition, Customer shall not be entitled to reservation charge credits in the event of a service outage affecting the transportation service to be provided under this Agreement.

Except as expressly stated herein, Equitrans’ applicable maximum rates and charges set forth in the Statement of Rates of its Tariff continue to apply.

2. Customer acknowledges that it is electing Negotiated Rates as an alternative to the rates and charges set forth in the Statement of Rates of Equitrans’ Tariff applicable to Rate Schedule FTS, as revised from time to time.

3. This Exhibit C is effective 1/1/2022 and continues in effect through 9/30/2036.

4. In the event any provision of this Exhibit C is held to be invalid, illegal or unenforceable by any court, regulatory agency, or tribunal of competent jurisdiction, the validity, legality, and enforceability of the remaining provisions, terms or conditions shall not in any way be affected or impaired thereby,

        Page 2 of 3

and the term, condition, or provision which is held illegal or invalid shall be deemed modified to conform to such rule of law, but only for the period of time such order, rule, regulation, or law is in effect.

5. Other Special Provisions: None.

IN WITNESS WHEREOF, Customer and Equitrans have executed this Exhibit C by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By /s/ Keith Shoemaker 12/4/2021	By /s/ Diana M. Charletta 12/6/2021
Keith Shoemaker (Date)	Diana M. Charletta (Date)
Title: Senior Vice President, Commercial EQT Energy, LLC	Title: President and Chief Operating Officer

        1296 - Page 3 of 3

EX-10.34(J)

Exhibit 10.34(j)

EXECUTION VERSION

SPECIFIC TERMS IN THIS AGREEMENT HAVE BEEN REDACTED BECAUSE SUCH TERMS ARE BOTH NOT MATERIAL AND ARE OF A TYPE THAT EQUITRANS MIDSTREAM CORPORATION TREATS AS CONFIDENTIAL. THESE REDACTED TERMS HAVE BEEN MARKED IN THIS EXHIBIT AT THE APPROPRIATE PLACE WITH THREE ASTERISKS [***].

SECOND AMENDMENT TO

GAS GATHERING AND COMPRESSION AGREEMENT

    THIS SECOND AMENDMENT TO GAS GATHERING AGREEMENT AND COMPRESSION AGREEMENT (this “Amendment”), dated December 6, 2021 (“Effective Date”), is made and entered into by and among EQT Corporation, a Pennsylvania corporation, (“EQT Corp.”) EQT Production Company, a Pennsylvania corporation, Rice Drilling B LLC, a Delaware limited liability company and EQT Energy, LLC, a Delaware limited liability company, (collectively, “Producer”), and EQM Gathering Opco, LLC, a Delaware limited liability company (“Gatherer”). Producer and Gatherer may be referred to herein individually as a “Party” or collectively as the “Parties.”

RECITALS

WHEREAS, the Parties entered into that certain Gas Gathering and Compression Agreement dated as of February 26, 2020, as amended by that certain First Amendment to Gas Gathering and Compression Agreement among the Parties date August 26, 2020 (the “Gathering Agreement”); and

    WHEREAS, the Parties desire to amend the Gathering Agreement in accordance with the terms and conditions set forth in this Amendment.

    NOW, THEREFORE, in consideration of the mutual covenants set forth herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereby agree as follows:

AGREEMENT

1.Defined Terms. Defined terms used but not defined herein shall have the meanings given to such terms in the Gathering Agreement.

2.Amendment to Gathering Agreement Exhibits.

(a)Exhibit C to the Gathering Agreement is hereby amended and restated to read in its entirety as set forth on Appendix A attached hereto.

(b)Exhibit I to the Gathering Agreement is hereby amended and restated to read in its entirety as set forth on Appendix B attached hereto

(c)Exhibit L to the Gathering Agreement is hereby amended and restated to read in its entirety as set forth on Appendix C attached hereto.

(d)Exhibit O to the Gathering Agreement is hereby amended and restated to read in its entirety as set forth on Appendix D attached hereto.

(e)Exhibit P to the Gathering Agreement is hereby amended and restated to read in its entirety as set forth on Appendix E attached hereto.

3.Incremental Compression Fee. Section 5.1(d) of the Gathering Agreement is hereby deleted in its entirety and replaced with the following:

“(d)    Fees for providing Incremental Compression shall be calculated as follows (as such fee may be increased or decreased in accordance with Section 5.2, the “Incremental Compression Fee”):

(i)    Except as provided in clause (ii) and clause (iii), the product of (A) the aggregate quantity of Gas serviced from Incremental Compression, stated in Dth, received from Producer or for Producer’s account (including Dedicated Gas produced by any Affiliate) during such Month multiplied by (B) the number of stages of compression utilized with such Incremental Compression multiplied by (C) the applicable amounts set forth in Exhibit H.

(ii)    For all Dedicated Gas delivered from the Gathering System to Equitrans Low Pressure Delivery Points identified by Footnote #9 and Footnote #14 on Exhibit C, the product of (A) the aggregate quantity of Gas stated in Dth, delivered to any such Low Pressure Delivery Point during such Month multiplied by (B) the number of stages of compression utilized to facilitate delivery of such Gas to such Low Pressure Delivery Point whereby Parties agree [***] of compression shall be applicable if the average Low Pressure Delivery Point Pressure is greater than or equal to [***] psig and [***] stages of compression if the average Low Pressure Delivery Point Pressure is less than [***] psig multiplied by (C) either (i) $[***]per Dth; provided, however, Producer shall, as of the Effective Date of the First Amendment to the Gathering Agreement, be credited an amount of [***] Dollars ($[***]) against any Incremental Compression Fees thereafter accrued, in the aggregate, with respect to deliveries of Gas to the Equitrans Low Pressure Delivery Points identified by Footnote #9 on Exhibit C or (ii) the applicable amounts set forth in Exhibit H with respect to deliveries of Gas to the Equitrans Low Pressure Delivery Points identified by Footnote #14 on Exhibit C.

(iii)    For all Dedicated Gas delivered from the Gathering System to Equitrans Low Pressure Delivery Points identified by Footnote #19 on Exhibit C, the product of (A) the aggregate quantity of Gas stated in Dth, delivered to any such Low Pressure Delivery Point during such Month multiplied by (B) the applicable amounts set forth in Exhibit H multiplied by (C) one (1) if the average Low Pressure Delivery Point Pressure is greater than [***] psig and less than or equal to [***] psig; two (2) if the average Low Pressure Delivery Point Pressure is equal to or less than [***] psig; or [***] if the average Low Pressure Delivery Point Pressure is greater than [***] psig.

4.Exhibits. The Parties agree that the terms of the Gathering Agreement, as amended hereby, are subject to the terms and conditions set forth on the Exhibits to the Gathering Agreement, including any footnotes set forth thereon.

2

5.Effect. Except as expressly provided in this Amendment, all of the terms and provisions of the Gathering Agreement are and will remain in full force and effect and are hereby ratified and confirmed by the Parties.

6.Governing Law.

(a)This Amendment shall be governed by, construed, and enforced in accordance with the laws of the Commonwealth of Pennsylvania without regard to choice of law principles.

(b)The Parties agree that the appropriate, exclusive and convenient forum for any disputes among any of the Parties arising out of this Amendment or the transactions contemplated hereby shall be in any state or federal court in the City of Pittsburgh and County of Allegheny, Pennsylvania, and each of the Parties irrevocably submits to the jurisdiction of such courts solely in respect of any proceeding arising out of or related to this Amendment. The Parties further agree that the Parties shall not bring suit with respect to any disputes arising out of this Amendment or the transactions contemplated hereby in any court or jurisdiction other than the above specified courts. EACH PARTY HEREBY WAIVES ITS RIGHT TO TRIAL BY JURY IN ANY PROCEEDING ARISING OUT OF OR RELATING TO THIS AMENDMENT, WHETHER SOUNDING IN CONTRACT, TORT OR OTHERWISE.

7.Counterpart Execution. This Amendment may be executed in any number of counterparts, each of which shall be considered an original, and all of which shall be considered one and the same instrument.

8.Miscellaneous Provisions. The provisions of Article 18 of the Gathering Agreement, other than Sections 18.2, 18.3, 18.15, 18.16 and 18.17, shall apply to this Amendment mutatis mutandis.

[Signature Page Follows]

3

4

    IN WITNESS WHEREOF, each of the Parties has duly executed this Amendment effective as of the Effective Date.

PRODUCER:

EQT CORPORATION,

a Pennsylvania corporation

By:     /s/ David Khani    

Name:     David Khani

Title:     Chief Financial Officer

EQT PRODUCTION COMPANY,

a Pennsylvania corporation

By:     /s/ J.E.B. Bolen    

Name:     J.E.B. Bolen

Title:     Vice President of

Operations Planning

RICE DRILLING B LLC,

a Delaware limited liability company

By:     /s/ J.E.B. Bolen    

Name:     J.E.B. Bolen

Title:     Vice President of

Operations Planning

EQT ENERGY, LLC,

a Delaware limited liability company

By:     /s/ Keith Shoemaker    

Name:     Keith Shoemaker

Title:     Senior Vice President, Commercial

[Signature Page to Second Amendment to Gas Gathering and Compression Agreement]

GATHERER:

EQM GATHERING OPCO, LLC,

a Delaware limited liability company

By:     /s/ Diana M. Charletta        

Name: Diana M. Charletta

Title:     President and

Chief Operating Officer

[Signature Page to Second Amendment to Gas Gathering and Compression Agreement]

APPENDIX A

(Exhibit C to Gathering Agreement)

[See attached].

Appendix A

[***]

Appendix A

Appendix A

APPENDIX B

(Exhibit I to Gathering Agreement)

Appendix B

[***]

Appendix B

APPENDIX C

(Exhibit L to Gathering Agreement)

Sites For Which Producer Will Provide Low Pressure Dehydration
STATE	COUNTY	SYSTEM AMI	SITE
PA	Washington	Kevech	Kevech
PA	Washington	Mojo	Mojo
PA	Greene	BETA/WINDRIDGE/ASR/THROCKMORTON	Dahn-tahn
PA	Greene	BETA/WINDRIDGE/ASR/THROCKMORTON	Irish Pug
PA	Greene	BETA/WINDRIDGE/ASR/THROCKMORTON	Battle Phrog
PA	Greene	BETA/WINDRIDGE/ASR/THROCKMORTON	Mac
PA	Greene	BETA/WINDRIDGE/ASR/THROCKMORTON	Stattler Road
PA	Greene	BETA/WINDRIDGE/ASR/THROCKMORTON	Heart
PA	Greene	POLECAT	Polecat
PA	Greene	POLECAT	Drift Ridge
PA	Greene	YELLOW JACKET	Ridge Rd.
PA	Clearfield	N/A	Monarch
PA	Cameron	N/A	Whippoorwill IC
PA	Jefferson	N/A	Frano
PA	Clearfield	N/A	Gobbler IC
PA	Tioga	N/A	Tioga CS
PA	Elk	N/A	Benezette CS
PA	Clearfield	N/A	Hurd IC
PA	Indiana	N/A	Diamondville IC
PA	Armstrong	N/A	McKee
WV	Marion	N/A	GRT-26
WV	Marion	TAURUS	GLO-76
WV	Wetzel	TAURUS	BIG-464
WV	Wetzel	MERCURY	Big Run Dehy
WV	Marion	N/A	Potozcny
WV	Wetzel	DAYBREAK	MR SKILLING
WV	Wetzel	DAYBREAK	NEXTWAVE EFT
WV	Wetzel	DAYBREAK	FRACSLAP
WV	Wetzel	DAYBREAK	MICHAEL KUHN
PA	GREENE	DAYBREAK	SOLES
PA	GREENE	DAYBREAK	LUMBER
PA	GREENE	DAYBREAK	SPLEEN SPLITTER
PA	GREENE	DAYBREAK	HOOSKER DOO
WV	MARION	GREYHOUND	RADCLIFF

Appendix C

Sites For Which Gatherer Will Provide High Pressure Dehydration
STATE	COUNTY	SYSTEM AMI	SITE
PA	GREENE	JUPITER AND BJ	GOOD
PA	GREENE	JUPITER AND BJ	HABE
PA	GREENE	JUPITER AND BJ	PETRAITIS
PA	GREENE	JUPITER AND BJ	SCHUMAKER
PA	GREENE	JUPITER AND BJ	MCNEELY
PA	GREENE	JUPITER AND BJ	PATTON
PA	WASHINGTON	NIGHTFALL AND CJ	BROVA
PA	WASHINGTON	PISCES	JT FARM
PA	WASHINGTON	PISCES	KUHN
PA	WASHINGTON	PISCES	EALY
PA	WASHINGTON	PISCES	STOUT
PA	WASHINGTON	REDD	REDD
PA	WASHINGTON	HEYL	HEYL
PA	GREENE	JUPITER AND BJ	CLEMENTE
PA	GREENE	BETA/WINDRIDGE/ASR/THROCKMORTON	THROCKMORTON
PA	GREENE	BETA/WINDRIDGE/ASR/THROCKMORTON	CORSAIR
PA	GREENE	BETA/WINDRIDGE/ASR/THROCKMORTON	STROSNIDER
PA	GREENE	BETA/WINDRIDGE/ASR/THROCKMORTON	MAGNUM
PA	GREENE	BETA/WINDRIDGE/ASR/THROCKMORTON	PLHC
PA	GREENE	BETA/WINDRIDGE/ASR/THROCKMORTON	THUNDER 1
PA	GREENE	POLECAT	COWBELL
PA	GREENE	POLECAT	DOWNER
PA	GREENE	POLECAT	FOLEY
PA	GREENE	DAYBREAK	PALE ALE
PA	GREENE	DAYBREAK	BARLEY WINE
PA	GREENE	DAYBREAK	TEAMWORK
PA	GREENE	DAYBREAK	TRUST
PA	GREENE	DAYBREAK	HOLT
PA	GREENE	DAYBREAK	GALLANT FOX
PA	GREENE	DAYBREAK	AMERICAN PHAROAH
WV	MARION	GREYHOUND	VANDERBILT
WV	MARION	GREYHOUND	TESLA
WV	MARION	GREYHOUND	CARNEGIE
*Updates to the development plan may cause shifts

The Parties agree that i) Producer may install centralized dehydration facilities where appropriate; ii) Producer shall be required to satisfy the Gas Quality Specifications; iii) in the event Producer installs centralized dehydration facilities, Producer shall install a) necessary facilities to handle any fluids, debris and/or other non-conforming substances upstream of the central dehydration facilities, including by conducting routine pigging operations, b) necessary post-dehydration filtration to prevent glycol carryover from the dehydration tower, and c) a moisture analyzer with data hand-off to Equitrans to monitor tower performance.

Appendix C

APPENDIX D

(Exhibit O to Gathering Agreement)*

[***]

Appendix D

APPENDIX E

(Exhibit P to Gathering Agreement)

INCREMENTAL COMPRESSION

Incremental Compression
AMIs	Total HP	Anticipated TIL
Pisces	-	6/9/2021
Throckmorton	-	11/16/2021
Jupiter/BJ AMI (PA)	2,500	TBD
Cygrymus (PA)	30,0001	TBD
Other PA Incremental Builds	7,5001	TBD
Corona X (WV)	25,0001	TBD
WV Incremental Builds	15,000	TBD
Total	80,000

1 [***]

Appendix E

EX-10.34(K)

Exhibit 10.34(k)

SPECIFIC TERMS IN THIS AGREEMENT HAVE BEEN REDACTED BECAUSE SUCH TERMS ARE BOTH NOT MATERIAL AND ARE OF A TYPE THAT EQUITRANS MIDSTREAM CORPORATION TREATS AS CONFIDENTIAL. THESE REDACTED TERMS HAVE BEEN MARKED IN THIS EXHIBIT AT THE APPROPRIATE PLACE WITH THREE ASTERISKS [***].

THIRD AMENDMENT TO

GAS GATHERING AND COMPRESSION AGREEMENT

THIS THIRD AMENDMENT TO GAS GATHERING AGREEMENT AND COMPRESSION AGREEMENT (this “Amendment”), dated December 21, 2021 and made effective as of January 1, 2022 (“Effective Date”), is made and entered into by and among EQT Corporation, a Pennsylvania corporation, (“EQT Corp.”) EQT Production Company, a Pennsylvania corporation, Rice Drilling B LLC, a Delaware limited liability company and EQT Energy, LLC, a Delaware limited liability company, (collectively, “Producer”), and EQM Gathering Opco, LLC, a Delaware limited liability company (“Gatherer”). Producer and Gatherer may be referred to herein individually as a “Party” or collectively as the “Parties.”

RECITALS

WHEREAS, the Parties entered into that certain Gas Gathering and Compression Agreement dated as of February 26, 2020, as amended by that certain First Amendment to Gas Gathering and Compression Agreement among the Parties dated August 26, 2020 and that certain Second Amendment to Gas Gathering and Compression Agreement among the Parties dated December 6, 2021 (the “Gathering Agreement”); and

WHEREAS, the Parties desire to amend the Gathering Agreement for the purpose of reflecting adjustments to each System AMI MDQ and the MRDO for each corresponding Delivery Point in accordance with Section 3.4 of the Gathering Agreement.

NOW, THEREFORE, in consideration of the mutual covenants set forth herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereby agree as follows:

AGREEMENT

1.Defined Terms. Defined terms used but not defined herein shall have the meanings given to such terms in the Gathering Agreement.

2.Amendment to Exhibit C. Exhibit C to the Gathering Agreement is hereby amended and restated to read in its entirety as set forth on Appendix A attached hereto

3.Effect. Except as expressly provided in this Amendment, all of the terms and provisions of the Gathering Agreement are and will remain in full force and effect and are hereby ratified and confirmed by the Parties.

4.Governing Law.

(a)This Amendment shall be governed by, construed, and enforced in accordance with the laws of the Commonwealth of Pennsylvania without regard to choice of law principles.

(b)The Parties agree that the appropriate, exclusive and convenient forum for any disputes among any of the Parties arising out of this Amendment or the transactions contemplated hereby shall be in any state or federal court in the City of Pittsburgh and County of Allegheny, Pennsylvania, and each of the Parties irrevocably submits to the jurisdiction of such courts solely in respect of any proceeding arising out of or related to this Amendment. The Parties further agree that the Parties shall not bring suit with respect to any disputes arising out of this Amendment or the transactions contemplated hereby in any court or jurisdiction other than the above specified courts. EACH PARTY HEREBY WAIVES ITS RIGHT TO TRIAL BY JURY IN ANY PROCEEDING ARISING OUT OF OR RELATING TO THIS AMENDMENT, WHETHER SOUNDING IN CONTRACT, TORT OR OTHERWISE.

5.Counterpart Execution. This Amendment may be executed in any number of counterparts, each of which shall be considered an original, and all of which shall be considered one and the same instrument.

6.Miscellaneous Provisions. The provisions of Article 18 of the Gathering Agreement, other than Sections 18.2, 18.3, 18.15, 18.16 and 18.17, shall apply to this Amendment mutatis mutandis.

[Signature Page Follows]

2

IN WITNESS WHEREOF, each of the Parties has duly executed this Amendment effective as of the Effective Date.

PRODUCER:

EQT CORPORATION,

a Pennsylvania corporation

By:    /s/ David Khani            

Name:    David Khani            

Title:    Chief Financial Officer        

EQT PRODUCTION COMPANY,

a Pennsylvania corporation

By:    /s/ J.E.B. Bolen            

Name:    J.E.B. Bolen            

Title:    Vice President of Operations Planning

RICE DRILLING B LLC,

a Delaware limited liability company

By:    /s/ J.E.B. Bolen            

Name:    J.E.B. Bolen            

Title:    Vice President of Operations Planning

EQT ENERGY, LLC,

a Delaware limited liability company

By:    /s/ Keith Shoemaker        

Name:    Keith Shoemaker        

Title:    Senior Vice President, Commercial

GATHERER:

EQM GATHERING OPCO, LLC,

a Delaware limited liability company

[Signature Page to Third Amendment to Gas Gathering and Compression Agreement]

By:    /s/ John M. Quinn        

Name:    John M. Quinn            

Title:    VP Business Development & Commercial Svcs

[Signature Page to Third Amendment to Gas Gathering and Compression Agreement]

APPENDIX A

(Exhibit C to Gathering Agreement)

[see attached].

Appendix A

[***]

Appendix A

EX-10.34(M)

Exhibit 10.34(m)

SPECIFIC TERMS IN THIS LETTER AGREEMENT HAVE BEEN REDACTED BECAUSE SUCH TERMS ARE BOTH NOT MATERIAL AND ARE OF A TYPE THAT EQUITRANS MIDSTREAM CORPORATION TREATS AS CONFIDENTIAL. THESE REDACTED TERMS HAVE BEEN MARKED IN THIS EXHIBIT AT THE APPROPRIATE PLACE WITH THREE ASTERISKS [***].

February 4, 2022

Rice Drilling B LLC

625 Liberty Avenue, Suite 1700

Pittsburgh, PA 15222-3111    

Attn: Ray Franks

RE:    Ealy North Well Pad

Dear Mr. Franks:

Reference is made to that certain Gas Gathering and Compression Agreement dated as of February 26, 2020 by and among EQT Corporation, EQT Production Company, Rice Drilling B LLC, and EQT Energy, LLC (collectively, “Producer”), and EQM Gathering Opco, LLC (“Gatherer”), as the same was amended by that certain First Amendment to Gas Gathering and Compression Agreement dated August 26, 2020, that Second Amendment to Gas Gathering and Compression Agreement dated December 6, 2021 and that Third Amendment to Gas Gathering Compression Agreement dated December 21, 2021, between Producer and Gatherer (as amended, the “Gathering Agreement”). All capitalized terms used but not otherwise defined in this letter agreement (“Letter Agreement”) shall have the meanings (if any) ascribed to them in the Gathering Agreement.

WHEREAS, Producer currently delivers Dedicated Gas produced from Producer’s Well Pad known as the Ealy North Well Pad (“Ealy North Pad”) to the applicable Receipt Point (“Ealy North Receipt Point”);

WHEREAS, by letter dated April 27, 2021, Gatherer notified Producer that the Dedicated Gas being delivered to the Ealy North Receipt Point contains [***] in violation of Section 10.2 of the Gathering Agreement; and

WHEREAS, Producer desires to install, at Producer’s sole cost and expense, [***] and appurtenances described on Exhibit A attached hereto (“Condensate Facilities”) at the Ealy North Receipt Point location (“Location”) depicted on Exhibit A attached hereto for the purpose of bypassing the [***] around the Gatherer’s Measurement Facilities at the Ealy North Receipt Point

NOW, THEREFORE, Gatherer and Producer (collectively, “Parties” and each a “Party”), by execution of this Letter Agreement and in consideration of the mutual covenants contained herein, do hereby agree as follows, as of the date first written above (the “Execution Date”):

1

1.Installation Work; Maintenance Work; Reimbursement.

(a)Subject to the terms and conditions of this Letter Agreement, Producer agrees to design and install, or cause to be designed and installed, the Condensate Facilities at the Location (the “InstallationWork”) at its sole cost and expense. Producer agrees to use commercially reasonable efforts to complete the Installation Work on or before [***]. The performance standard set forth in Section 3.1 of the Gathering Agreement shall apply to Producer’s performance of the Installation Work, mutatis mutandis.

(b) Following the completion of the Installation Work, Producer shall notify Gatherer thereof, and Gatherer shall promptly thereafter inspect the Installation Work (including the performance of any necessary tests) and either approve the Condensate Facilities in writing or provide Producer written notice of any deficiencies in the function of the Condensate Facilities or any failure of the Installation Work to meet the performance standard set forth above.

(c)From and after (i) the completion of the Installation Work and (ii) the written approval by Gatherer of the Condensate Facilities, Producer shall assign and convey to Gatherer by an assignment in the form attached hereto as Exhibit C, and Gatherer shall take assignment of, and own and operate, the Condensate Facilities. Following such assignment and conveyance, the Condensate Facilities shall be deemed part of the Gathering System for all purposes under the Gathering Agreement, and Gatherer shall have all rights and responsibilities with respect to the Condensate Facilities as are applicable to the Gathering System under the Gathering Agreement, including with respect to Maintenance under Section 7.2 of the Gathering Agreement, subject to Section 2 (Indemnification). For the avoidance of doubt, Gatherer shall be responsible for performing any necessary Maintenance with respect to the Condensate Facilities in accordance with the terms of the Gathering Agreement (the “MaintenanceWork”); provided, however, Producer shall reimburse Gatherer for all Maintenance Costs (defined below). Without limitation of the foregoing, the Parties agree to be responsible for the Measurement Facilities and related interconnect facilities at the Ealy North Receipt Point in accordance with Exhibit B attached hereto and Exhibit N to the Gathering Agreement shall be deemed amended hereby with respect to the Ealy North Receipt Point.

(d)“Maintenance Costs” means (i) all internal and external costs and expenses incurred or committed to by Gatherer and/or its Affiliates in order to perform the Maintenance Work, including without limitation the costs and expenses of acquiring real property rights and/or repairing of any real or personal property in the performance of those activities, and (ii) overhead and other costs allocated to the Maintenance Work in accordance with GAAP and Gatherer’s customary allocation procedures. As soon as practical after the completion of any Maintenance Work, Gatherer shall deliver to Producer a statement showing in reasonable detail the actual Maintenance Costs incurred in connection with such Maintenance Work and an invoice for the full amount of such Costs. Producer agrees to make payment thereof to Gatherer within [***] Business Days following the receipt of such statement and invoice, subject to the provisions set forth in Section 13.1 of the Gathering Agreement. For the avoidance of doubt, the audit rights of Producer set forth in Section 13.3 of the Gathering Agreement shall apply to any statements delivered hereunder.

(e)Except to the extent expressly set forth herein, this Letter Agreement shall not amend or otherwise modify the obligations of the Parties with respect to the delivery and

2

receipt of Dedicated Gas to each Receipt Point meeting the Gas Quality Specifications, it being understood that Gatherer reserves all of its rights under Article 10 of the Gathering Agreement, including without limitation the right to immediately discontinue receipt of Dedicated Gas containing [***] into the Gathering System downstream of the Condensate Facilities; to the extent Producer’s Gas fails at any time to conform to the Gas Quality Specifications or contains [***] following the installation of the Condensate Facilities, as measured downstream of the Condensate Facilities.

2.    Indemnification. Producer agrees to release, indemnify, defend and hold harmless Gatherer and its Affiliates, directors, officers, employees, agents, consultants, representatives and invitees (“Gatherer Indemnitees”) from and against all loss, liability, damage, penalty, claim, action, cause of action, judgment and expense arising from or related to (a) the Installation Work, and (b) solely to the extent arising during the [***] [(***)] period beginning on the Execution Date, Maintenance Work and the operation of the Condensate Facilities, except, in the case of each of clause (a) and (b), to the extent the same is caused by the negligence or the willful misconduct of the Gatherer Indemnitees.

3.    Miscellaneous. The terms and provisions of this Letter Agreement shall be binding on, and shall inure to the benefit of, the Parties and their respective successors and permitted assigns. This Letter Agreement may be executed in any number of counterparts, and each such counterpart hereof shall be deemed to be an original instrument, but all of such counterparts shall constitute for all purposes one agreement. Any signature hereto delivered by a Party by facsimile or other electronic transmission (including scanned documents delivered by email) shall be deemed an original signature hereto, and execution and delivery by such means shall be binding upon the Parties.

4.    Effect of Letter Agreement. The Parties acknowledge and agree that this Letter Agreement constitutes a written instrument executed by the Parties and fulfills the requirements of an amendment contemplated by Section 18.7 of the Gathering Agreement. The Parties hereby ratify and confirm the Gathering Agreement, as amended hereby. Except as expressly provided herein, the provisions of the Gathering Agreement shall remain in full force and effect in accordance with their respective terms following the execution of this Letter Agreement. In the event of any conflict or inconsistencies between this Letter Agreement and the Gathering Agreement, the terms and conditions of this Letter Agreement shall prevail.

[SIGNATURE PAGE FOLLOWS]

3

IN WITNESS WHEREOF, the Parties have executed this Letter Agreement as of the date first written above.

GATHERER:

EQM GATHERING OPCO, LLC,

a Delaware limited liability company

By:     /s/ Jack Mackin    

Name: Jack Mackin

Title:     VP Operations

PRODUCER:

EQT CORPORATION,

a Pennsylvania corporation

By:     /s/ David Khani            

Name:     David Khani

Title:     Chief Financial Officer

EQT PRODUCTION COMPANY,

a Pennsylvania corporation

By:     /s/ J.E.B. Bolen            

Name:     J.E.B. Bolen

Title:     Vice President of Operations Planning

RICE DRILLING B LLC,

a Delaware limited liability company

By:     /s/ J.E.B. Bolen            

Name:     J.E.B. Bolen

Title:     Vice President of Operations Planning

EQT ENERGY, LLC,

a Delaware limited liability company

By:     /s/ Keith Shoemaker            

Name:     Keith Shoemaker

Title:     Senior Vice President, Commercial

4

EXHIBIT A

Condensate Facilities

[***]

EXHIBIT B

Responsibility Matrix

6

EXHIBIT C

Form of Assignment

[***]

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EX-10.44

Exhibit 10.44

EQUITRANS MIDSTREAM CORPORATION

2022 PERFORMANCE SHARE UNIT PROGRAM

    EQUITRANS MIDSTREAM CORPORATION (the “Company”) hereby establishes this EQUITRANS MIDSTREAM CORPORATION 2022 PERFORMANCE SHARE UNIT PROGRAM (the “Program”), in accordance with the terms provided herein.

    WHEREAS, the Company maintains certain long-term incentive award plans, including the Equitrans Midstream Corporation 2018 Long-Term Incentive Plan (as amended from time to time, the “2018 Plan”), for the benefit of its directors and employees, of which the Program is a subset; and

    WHEREAS, in order to further align the interests of executives and key employees with the interests of the Company’s shareholders, the Company desires to provide long-term incentive benefits through the Program, in the form of awards qualifying as “Performance Awards” under the 2018 Plan.

    NOW, THEREFORE, the Company hereby provides for incentive benefits for executives and key employees of the Company and its Affiliates and adopts the terms of the Program on the following terms and conditions:

Section 1. Purpose. The main purpose of the Program is to provide long-term incentive opportunities to executives and key employees to further align their interests with those of the Company’s shareholders and with the strategic objectives of the Company. By placing a portion of the employee’s compensation at risk under the Program, the Company has an opportunity to reward the employee when the Company’s performance meets or exceeds expectations or reduce the compensation opportunity when performance does not meet expectations. As a subset of the 2018 Plan, this Program is subject to and shall be governed by the terms and conditions of the 2018 Plan. Capitalized terms used herein and not otherwise defined shall have the meanings given to such terms in the 2018 Plan.

Section 2. Effective Date. The effective date of this Program is January 1, 2022. The Program will remain in effect until payment following (or, in the case of a Qualifying Change of Control, on) the earlier of (i) December 31, 2024 or (ii) the closing date of a Qualifying Change of Control. All awards under the Program are paid in accordance with Section 6, unless otherwise amended or terminated as provided in Section 20. For purposes of this Program, a “Qualifying Change of Control” means a Change of Control (as then defined in the 2018 Plan) unless (a) all outstanding Performance Share Units, as defined in Section 4, under the Program are assumed by the surviving entity of the Change of Control (or otherwise equitably converted or substituted in connection with the Change of Control in a manner approved by the Committee) or (b) the Company is the surviving entity of the Change of Control.

Section 3. Eligibility. The Committee shall, in its sole discretion, select the employees of the Company and its Affiliates who shall be eligible to participate in the Program from those individuals eligible to participate in the 2018 Plan (each a “Participant” and collectively the “Participants”). In the event that an employee is hired by the Company or an Affiliate during the Performance Period (as defined in Section 5 below), the Committee shall, in its sole discretion, determine whether the employee will be eligible to participate in the Program.

Section 4. Performance Share Unit Awards. Awards under the Program are designated in the form of performance share units (as adjusted from time to time in accordance with Section 14, the “Performance Share Units”), which are awards to be settled in shares of the Company’s common stock (“Common Stock”) and/or in cash, as set forth in a Participant’s award agreement under the Program. Upon being selected to participate in the Program, each Participant shall be awarded a number of Performance Share Units, which award shall be approved by the Committee.

The Performance Share Units shall be held in bookkeeping accounts on behalf of the Participants and do not represent actual shares of Common Stock. A Participant shall have no right to exchange the Performance Share Units for cash, stock or any other benefit and shall be a mere unsecured creditor of the Company with respect to such Performance Share Units and any future rights to benefits.

Section 5. Relative TSR Performance and Determination of Awarded Value. Subject to Section 7, the amount to be distributed to a Participant will be based on the Company’s total shareholder return (“Total Shareholder Return,” or “TSR”) ranking relative to the TSRs of companies included in a specified peer group (the “Peer Group”) designated on Attachment A (“Relative TSR”). Relative TSR for the Performance Period is calculated as described in Attachment A. For purposes of this Program, the “Performance Period” shall mean the period commencing on January 1, 2022 and continuing thereafter until the earlier of (a) December 31, 2024 or (b) the closing date of a Qualifying Change of Control.

If a Participant’s award agreement under the Program stipulates that the Participant’s award will be distributed in cash, the Participant’s “Awarded Value” shall be calculated by multiplying (a) the number of such Participant’s Performance Share Units, by (b) the payout factor calculated as set forth on Attachment A (the “Payout Factor”), by (c) the closing price of the Company’s Common Stock at the end of the Performance Period or, in the case of a Qualifying Change of Control, the closing price of the Company’s Common Stock on the business day immediately preceding the date of the Qualifying Change of Control, in each case as reported in the Nationally Recognized Reporting Service (as defined in Attachment A). If a Participant’s award agreement under the Program contemplates that the Participant’s award will be distributed in shares of Common Stock, the Participant’s “Awarded Value” shall be calculated by multiplying (i) the number of such Participant’s Performance Share Units by (ii) the Payout Factor.

If the record date for regular dividends or special dividends with respect to the Company’s Common Stock (whether made in cash or stock, unless made in accordance with any shareholder rights plan or similar arrangement) occurs during the Performance Period, then the Participant shall earn a right to receive a cash payment following the Performance Period in respect of such dividends. The amount of such cash payment shall be equal to the product of (a) such Participant’s Performance Share Units, multiplied by (b) the Payout Factor, multiplied by (c) the cumulative amount of all regular and special dividends paid during the Performance Period. This cash payment shall be subject to the same Relative TSR performance conditions, continued service requirements and transfer restrictions as apply to the Performance Share Units with respect to which they relate and shall be paid at the same time as the Performance Share Units with respect to which they relate.

Payments under the Program are expressly contingent upon achievement of the Relative TSR performance conditions and continued service requirements, as applicable.

Section 6. Payment; Overall Limit. Subject to Section 7 and except as provided in this Section 6, each Participant’s Awarded Value will be distributed in cash, in shares of

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Common Stock, or any combination thereof, as set forth in the Participant’s award agreement under the Program, no later than seventy five (75) days following the end of the Performance Period, provided that any release of claims required by Section 7 has become effective. Subject to Section 7, in the event of a Qualifying Change of Control, the Awarded Value will be distributed in cash or in shares of Common Stock on the closing date of the transaction. The maximum amount payable to any one Participant under the Program with respect to any one calendar year within the Performance Period shall be the amount set forth and as calculated in the 2018 Plan with respect to Performance Awards. No elections shall be permitted with respect to the timing of any payments.

Section 7. Change of Status. In making decisions regarding employees’ participation in the Program and the extent to which awards are payable in the case of an employee whose employment ceases prior to payment, the Committee may consider any factors that it deems to be relevant. Unless otherwise determined by the Committee, and subject to the terms of any written employment-related agreement that a Participant has with the Company (including any confidentiality, non-solicitation, non-competition, change of control or similar agreement, as required by the Company), the following shall apply in the case of a Participant whose employment ceases prior to payment of the Awarded Value:

(a)Termination After Change of Control. With respect to any Participant’s award under the Program, and notwithstanding Section 9 of the 2018 Plan, in the event that following a Change of Control that is not a Qualifying Change of Control, (i) such Participant’s employment is terminated without Cause (as defined below), or (ii) such Participant resigns for Good Reason (as defined below), in each case prior to the second anniversary of the effective date of the Change of Control, the Participant shall retain all of his or her Performance Share Units, contingent upon (A) the Participant executing and not revoking a full release of claims in a form acceptable to the Company within 30 days of his or her termination or resignation, as applicable, and (B) achievement of the Relative TSR performance conditions pursuant to Section 5.

Solely for purposes of this Program, “Cause” shall mean: (i) a Participant’s conviction of a felony, a crime of moral turpitude or fraud or a Participant having committed fraud, misappropriation or embezzlement in connection with the performance of the Participant’s duties; (ii) a Participant’s willful and repeated failures to substantially perform assigned duties; or (iii) a Participant’s violation of any provision of a written employment-related agreement between the Participant and the Company or express significant policies of the Company. If the Company terminates a Participant’s employment for Cause, the Company shall give the Participant written notice setting forth the reason for the Participant’s termination not later than 30 days after such termination.

Solely for purposes of this Program, “Good Reason” shall mean a Participant’s resignation within 90 days after (but in all cases prior to the second anniversary of such Change of Control): (i) a reduction in such Participant’s base salary of 10% or more (unless the reduction is applicable to all similarly situated employees); (ii) a reduction in such Participant’s annual short-term bonus target by the greater of (A) 10% and (B) 5 percentage points of such Participant’s target bonus percentage, unless the reduction is applicable to all similarly situated employees; (iii) a significant diminution in such Participant’s job responsibilities, duties or authority; (iv) a Company requested change in the geographic location of such Participant’s primary reporting location of more than 50 miles (but excluding any requirement to work remotely); and/or (v) any

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other action or inaction that constitutes a material breach by the Company of such Participant’s award agreement under the Program.

A termination by a Participant shall not constitute termination for Good Reason unless such Participant first delivers to the General Counsel of the Company written notice: (i) stating that such Participant intends to resign for Good Reason pursuant to his or her award agreement; and (ii) setting forth with specificity the occurrence deemed to give rise to a right to terminate for Good Reason (which notice must be given no later than 90 days after the initial occurrence of such event). The Company shall have a reasonable period of time (not less than 30 days) to take action to correct, rescind or substantially reverse the occurrence supporting termination for Good Reason as identified by such Participant. Failure by the Company to act or respond to the written notice shall not be deemed to be an admission that Good Reason exists.

(b)Voluntary Termination With Continued Board Service. If a Participant’s employment is terminated voluntarily, including a Participant’s Retirement (as defined below), and the Participant remains on the board of directors of the Company or any Affiliate of the Company whose equity is publicly traded on the New York Stock Exchange or the NASDAQ Stock Market following such termination of employment, the Participant shall retain all of his or her Performance Share Units, contingent upon achievement of the Relative TSR performance conditions set forth in Section 5, for as long as the Participant remains on such board of directors, in which case any references herein to such Participant’s employment shall be deemed to include his or her continued service on such board. Except as set forth in the preceding sentence and subsections (a) and (d) of this Section 7, a Participant’s Performance Share Units shall be forfeited upon his or her resignation as an employee of the Company or an Affiliate.

(c)Death or Disability. Notwithstanding subsection (a) above, if the termination is due to the Participant’s death or Disability, the Participant (or the Participant’s estate or beneficiary) will retain all of his or her Performance Share Units, contingent upon the Participant (or the Participant’s estate or beneficiary) executing and not revoking a full release of claims in a form acceptable to the Company within 30 days of his or her death or Disability.

In the event of a Participant’s termination due to a Participant’s death or Disability, Performance Share Units that are retained shall be distributed to the Participant or the Participant’s estate or beneficiary within 75 days following the Participant’s termination in cash or shares of Common Stock as set forth in the Participant’s award agreement under the Program, in either case, without giving effect to the Payout Factor, subject to the Participant or the Participant’s estate or beneficiary executing and not revoking the full release of claims referenced above. Notwithstanding any other provisions of the Program, Participants shall have no vested rights to any Performance Share Units prior to payment.

(d)Retirement. Notwithstanding subsections (a) or (b) above, if the termination is due to the Participant’s Retirement, the Participant will retain a portion of his or her Performance Share Units (the number of Performance Share Units being retained is defined below as the “Pro Rata Amount”), contingent upon (A) the Participant executing and not revoking a full release of claims in a form acceptable to the Company within 30 days of his or her termination, and (B) achievement of the Relative TSR performance conditions set forth in Section 5,

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as follows, and the remainder shall be forfeited. The Pro Rata Amount shall equal the total number of Performance Share Units granted pursuant to this Program multiplied by a fraction, the numerator of which is the number of months of continuous employment with the Company and/or an Affiliate from the beginning of the Performance Period through the date of the Retirement and the denominator of which is 36. When determining the Pro Rata Amount, the Participant shall be considered to have been employed with the Company and/or an Affiliate for a full calendar month so long as the Participant is employed by such entity for at least one day during such calendar month.

Solely for purposes of this Program, “Retirement” shall mean a Participant’s voluntary termination of employment with the Company and its Affiliates after the Participant has (i) a length of service of at least ten (10) years and (ii) a combined age and length of service equal to at least sixty (60) years. The Participant’s length of service will be determined by the Company, in its sole discretion, based on the Company’s internal payroll records. For purposes of this definition, service with EQT Corporation prior to November 13, 2018 shall be treated the same as service with the Company and its Affiliates, provided that the Participant was assigned to the Company in connection with the separation from EQT Corporation. The termination of the Participant’s employment by the Company or its Affiliates shall not qualify as Retirement.

In the event of a Participant’s Retirement, Performance Share Units that are retained shall be distributed to the Participant (or the Participant’s estate or beneficiary) at the time specified in Section 6. Notwithstanding any other provisions of the Program, Participants shall have no vested rights to any Performance Share Units prior to payment.

(e)Other Termination. If a Participant’s employment is terminated for any reason other than those described in subsections (a) – (d) above, the Participant’s Performance Share Units shall be forfeited. For purposes of clarity, in the event a Participant’s employment is terminated other than for performance reasons, the Committee may determine that all or a portion of the Performance Share Units shall be retained upon such Participant’s termination.

As a condition to the retention of any Performance Share Units pursuant to the last sentence of Section 7(e) above, if any, Participant will be required to execute and not revoke a full release of claims in a form acceptable to the Company within 30 days of the termination. Failure to satisfy this condition will result in forfeiture of such Performance Share Units.

Section 8. Administration of the Plan. The Committee has responsibility for all aspects of the Program’s administration, including:

•Determining the extent to which the Relative TSR performance conditions and any applicable service requirements have been achieved prior to any payments under the Program,

•Ensuring that the Program is administered in accordance with its provisions and the 2018 Plan,

•Approving Program Participants,

•Authorizing Performance Share Unit awards to Participants,

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•Adjusting Performance Share Unit awards to account for extraordinary events, and

•Maintaining final authority to amend, modify or terminate the Program at any time.

Notwithstanding anything to the contrary in this Program, the Committee shall at all times retain the discretion with respect to all awards under this Program to reduce, eliminate, or determine the source of, any payment or award hereunder without regard to any particular factors specified in this Program. The interpretation and construction by the Committee of any provisions of the Program or of any adjusted Performance Share Units shall be final. No member of the Committee shall be liable for any action or determination made in good faith regarding the Program or any Performance Share Units thereunder. The Committee may designate another party to administer the Program, including Company management or an outside party. All conditions of the Performance Share Units must be approved by the Committee. As early as practicable prior to or during the Performance Period, the Committee shall approve the number of Performance Share Units to be awarded to each Participant. The associated terms and conditions of the Program will be communicated to Participants as close as administratively practicable to the date an award is made. Each Participant will acknowledge receipt of his or her award agreement and will agree to the terms of this Program in accordance with the Company’s procedures.

Section 9. Limitation of Rights. The Performance Share Units do not confer to Participants or their beneficiaries, executors or administrators any rights as shareholders of the Company (including voting and other shareholder rights) unless and until shares of Common Stock are in fact registered to or on behalf of a Participant in connection with the payment of the Performance Share Units. With respect to Awards that are settled in shares of Common Stock, upon conversion of the Performance Share Units into shares of Common Stock, a Participant will obtain full voting and other rights as a shareholder of the Company.

Section 10. Tax Consequences to Participants/Payment of Taxes.

(a) It is intended that: (i) until the Relative TSR performance conditions and any applicable service requirements are satisfied, a Participant’s right to payment for an award under this Program shall be considered to be subject to a substantial risk of forfeiture in accordance with those terms as defined or referenced in Sections 83(a), 409A and 3121(v)(2) of the Code; (ii) the Awarded Value shall be subject to employment taxes only upon the satisfaction of the Relative TSR performance conditions and any applicable service requirements; and (iii) until the Awarded Value is actually paid to a Participant, the Participant shall have merely an unfunded, unsecured promise to be paid the benefit, and such unfunded promise shall not consist of a transfer of “property” within the meaning of Code Section 83. It is further intended that Participants will not be in actual or constructive receipt of compensation with respect to the Performance Share Units within the meaning of Code Section 451 until the Awarded Value is paid.

(b) The Company or any Affiliate employing the Participant has the authority and the right to deduct or withhold, or require a Participant to remit to the employer, an amount sufficient to satisfy federal, state, and local taxes (including the Participant’s FICA obligation) required by law to be withheld with respect to any taxable event arising as a result of an award under the Program. With respect to withholding required upon any taxable event arising as a result of an award, to the extent the Committee determines that the award will be paid in shares of Common Stock, the employer shall satisfy the tax withholding required by withholding shares of Common Stock having a Fair Market Value as of the date that the amount of tax to be withheld is to be determined equal to the amount of tax required to be withheld. The obligations of the Company under this Program will be conditioned upon such payment or arrangements, and the Company, and, where applicable,

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its Affiliates will, to the extent permitted by law, have the right to deduct any such taxes from any payment of any kind otherwise due to a Participant.

Section 11. Recoupment Policy. Any shares of Common Stock distributed or amounts paid to a Participant under the Program, and any cash or other benefit acquired upon the sale of shares of Common Stock distributed to a Participant under the Program, shall be subject to the terms and conditions of the Equitrans Midstream Corporation Compensation Recoupment Policy, effective June 17, 2019, as may be amended or restated from time to time, to the extent such policy is applicable to this Program and the Participant. A copy of such policy is available upon request from the Company’s Corporate Secretary.

Section 12. Nonassignment. A Participant shall not be permitted to assign, alienate or otherwise transfer his or her Performance Share Units, and any attempt to do so shall be void.

Section 13. Impact on Benefit Plans. Payments under the Program shall not be considered as earnings for purposes of the Company’s or its Affiliates’ qualified retirement plans or any other retirement, compensation or benefit plan or program of the Company or its Affiliates unless specifically provided for and defined under such other plan or program. Nothing herein shall prevent the Company or its Affiliates from maintaining additional compensation plans and arrangements; provided, however, that no payments shall be made under such plans and arrangements if the effect thereof would be the payment of compensation otherwise payable under this Program regardless of whether the Relative TSR performance conditions were attained.

Section 14. Successors; Changes in Stock. The obligations of the Company under the Program shall be binding upon the successors and assigns of the Company. In the event of any spin-off, split-off or split-up, or dividend in partial liquidation, dividend in property other than cash or Common Stock, or extraordinary distribution to holders of Common Stock, each Participant’s Performance Share Units shall be appropriately adjusted to prevent dilution or enlargement of the rights of Participants that would otherwise result from any such transaction, provided such adjustment shall be consistent with Section 409A of the Code.

    In the case of a Change of Control, any obligation under the Program shall be handled in accordance with the terms of Sections 5 and 6 hereof. In any case not constituting a Change of Control in which the Common Stock is changed into or becomes exchangeable for a different number or kind of shares of stock or other securities of the Company or another corporation, or cash or other property, whether through reorganization, reclassification, recapitalization, stock split-up, combination of shares, merger or consolidation, then (i) the Awarded Value shall be calculated based on the closing price of such common stock on the closing date of the transaction on the principal market on which such common stock is traded, and (ii) there shall be substituted for each Performance Share Unit constituting an award the number and kind of shares of stock or other securities (or cash or other property) into which each outstanding share of Common Stock shall be so changed or for which each such share shall be exchangeable. In the case of any such adjustment, the Performance Share Units shall remain subject to the terms of the Program and the 2018 Plan.

Section 15. Notice. Except as may be otherwise provided by the 2018 Plan or determined by the Committee and communicated to a Participant, notices and communications hereunder must be in writing and shall be deemed sufficiently given if either sent by electronic mail, hand-delivered or if sent by overnight courier, or by postage paid first class mail. Notices sent by mail shall be deemed received five (5) business days

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after mailed, but in no event later than the date of actual receipt. Any notice delivered or made by electronic mail will be deemed to be given on the date of actual delivery as shown by the date of the electronic mail message. Notices shall be directed, if to a Participant, at such Participant’s address (or electronic mail address, as applicable) indicated by the Company’s records or, if to the Company, at the Company’s principal executive office, Attention: Manager, Compensation and Benefits or, if notice is sent to the Company by electronic mail, to Total Rewards@equitransmidstream.com.

Section 16. Dispute Resolution. Any dispute regarding the payment of benefits under this the Program or the 2018 Plan shall be resolved in accordance with the Equitrans Midstream Corporation Long-Term Incentive Plan Dispute Resolution Procedures effective December 15, 2020, as may be amended or restated from time to time. A copy of such procedures is available upon request from the Company’s Corporate Secretary and is available on the Fidelity NetBenefits website, which can be found at www.netbenefits.com.

Section 17. Applicable Law. This Program shall be governed by and construed under the laws of the Commonwealth of Pennsylvania without regard to its conflict of law provisions.

Section 18. Severability. In the event that any one or more of the provisions of this Program shall be held to be invalid, illegal or unenforceable, the validity, legality or enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

Section 19. Headings. The descriptive headings of the Sections of this Program are inserted for convenience of reference only and shall not constitute a part of this Program.

Section 20. Amendment or Termination of this Program. This Program may be amended, suspended or terminated by the Company at any time upon approval by the Committee and following a determination that the Program is no longer meaningful in relation to the Company’s strategy. Notwithstanding the foregoing, (i) no amendment, suspension or termination shall adversely affect a Participant’s rights to his or her award after the date of the award; provided, however, that the Company may amend this Program from time to time without any Participant’s consent to the extent deemed to be necessary or appropriate, in its sole discretion, to effect compliance with Code Section 409A or any other provision of the Code, including regulations and interpretations thereunder, which amendments may result in a reduction of benefits provided hereunder and/or other unfavorable changes to Participants, (ii) no amendment may alter the time of payment as provided in Section 6 of the Program, and (iii) no amendment may be made following a Change of Control.

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Attachment A

2022 Performance Share Unit Program

Calculation of Relative Total Shareholder Return & Payout Factors

For purposes of the Program, “Total Shareholder Return” or “TSR” shall mean the total shareholder return as determined by dividing (i) the sum of (A) the Ending Period Average Price minus the Beginning Period Average Price plus (B) all dividends and other distributions paid on the issuer’s shares during the Performance Period, assuming such dividends and other distributions are invested in shares on the ex-dividend date for such dividendor other distribution, by (ii) the Beginning Period Average Price. The Committee shall have the authority to make appropriate equitable adjustments to account for extraordinary items affecting the TSR.

For purposes of calculating TSR, “Beginning Period Average Price” shall mean the average official closing price per share of the issuer over the 15 consecutive trading days ending with and including December 31, 2021 (if the applicable day is not a trading day, the immediately preceding trading day).

For purposes of calculating TSR, “Ending Period Average Price” shall mean the average official closing price per share of the issuer over the 15 consecutive trading days ending with and including December 31, 2024 (if the applicable day is not a trading day, the immediately preceding trading day).

All references in this Program to the “Nationally Recognized Reporting Service” shall be references to either the print or electronic version of a nationally recognized publication that reports the daily closing stock price of the Company and each member of the Peer Group described below.

Each company, including the Company, will be ranked in descending order by the TSR so calculated. In the event any member of the Peer Group identified below liquidates or reorganizes under the United States Bankruptcy Code (U.S.C. Title 11) before the end of the Performance Period, such member shall remain in the Peer Group for purposes of calculating the Payout Factor for the Performance Period. In the event of any acquisition, merger, consolidation, other reorganization, asset sale, go private transaction or material change in ownership, legal structure, or business operations (including for the avoidance of doubt, any rollup or other simplification transaction involving related parties) of any member of the Peer Group before the end of the Performance Period, the Committee shall have discretionary authority to retain, remove, or replace such member for purposes of calculating the Payout Factor.

The Payout Factor will be determined based on the level of achievement of the Relative TSR Ranking during the Performance Period.

Relative TSR Ranking

	Threshold	Target	Maximum
Performance Goal	At 25th percentile	50th percentile	At or above 75th percentile
Payout Factor	50%	100%	200%

NOTE: Above Threshold all Payout Factors are interpolated on a straight-line basis between the data points above, with 200% being the maximum in all cases. Below threshold, the Payout Factor shall be zero.

For purposes of the Program, the Peer Group shall consist of the following companies:

Antero Midstream Corporation

Cheniere Energy, Inc.

Crestwood Equity Partners LP
DCP Midstream LP

EnLink Midstream, LLC

Hess Midstream LP

Kinder Morgan, Inc.

Magellan Midstream Partners, L.P.

National Fuel Gas Company

ONEOK, Inc.

Plains All American Pipeline, L.P.

Targa Resources Corp.

The Williams Companies, Inc.

Western Midstream Partners, LP

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EX-10.45

Exhibit 10.45

PARTICIPANT AWARD AGREEMENT

(2022 PSU Program – Share Settled)

[•], 2022

 Dear [Name]:

Pursuant to the terms and conditions of the Equitrans Midstream Corporation 2018 Long-Term Incentive Plan (as amended from time to time, the “Plan”) and the 2022 Performance Share Unit Program (the “Program”), effective January 1, 2022, the Management Development and Compensation Committee (the “Committee”) of the Board of Directors of Equitrans Midstream Corporation (the “Company”) grants you «NumberUnits» Target Performance Share Units (the “Award”), the value of which is determined by reference to the Company’s common stock.  The terms and conditions of the Award, including, without limitation, vesting and distribution, shall be governed by the provisions of this Participant Award Agreement and the Program document attached hereto as Exhibit A; provided that the Award is also subject to the terms and limits included within the Plan. As approved, the Award will be settled in shares of Company common stock; provided, however, that the Committee retains the discretion for any reason to settle the Award in cash, Company common stock or any combination thereof.

The terms contained in the Plan and the Program are hereby incorporated into and made a part of this Participant Award Agreement, and this Participant Award Agreement shall be governed by and construed in accordance with the Program and the Plan. In the event of any actual or alleged conflict between (a) the provisions of the Plan and the provisions of this Participant Award Agreement, the provisions of the Plan shall be controlling and determinative, and (b) the provisions of this Participant Award Agreement and the terms of any written employment-related agreement that you have with the Company (including any confidentiality, non-solicitation, non-competition, change of control or similar agreement, as required by the Company), the terms of such employment-related agreement shall be controlling and determinative.

You may access important information about the Company and the Plan through the Company’s website. Copies of the Plan and Plan Prospectus can be found by logging into the Fidelity NetBenefits website, which can be found at www.netbenefits.com, and clicking on the “Menu” tab followed by the “Stock Plans” tab and then following the prompts for your Plan documents. Copies of information generally delivered to the Company’s shareholders can be found at www.equitransmidstream.comby clicking on the “Investors” link on the main page and then “Financial Reporting” and “SEC Filings.” Paper copies of such documents are available upon request made to the Company’s Corporate Secretary.

Your Award under the Program will be effective only if, no later than 45 days after the date of this Participant Award Agreement, (a) you accept your Award through the Fidelity NetBenefits website and (b) to the extent you are not already subject to an agreement with the Company containing covenants regarding confidentiality, non-solicitation, and if required by the Company, non-competition, you execute an agreement containing the applicable covenants that is acceptable to the Company.

When you accept your Award through the Fidelity NetBenefits website, you shall be deemed to have (a) acknowledged receipt of this Award granted on the date of this Participant Award Agreement (the terms of which are subject to the terms and conditions of this Participant Award Agreement, the Program document and the Plan) and copies of this Participant Award Agreement, the Program document and the Plan, and(b) agreed to be bound by all the provisions of this Participant Award Agreement, the Program document and the Plan.

Exhibit A

Equitrans Midstream Corporation

2022 Performance Share Unit Program

[attached hereto]

EX-10.46

Exhibit 10.46

Equitrans Midstream Corporation

2022 RESTRICTED STOCK AWARD AGREEMENT

Non-transferable

G R A N T T O

_________________________________________

(“Grantee”)

DATE OF GRANT: JANUARY [•], 2022        

(“Grant Date”)

by Equitrans Midstream Corporation (the “Company”) of [_______] restricted shares of the Company’s common stock (the “Common Stock”), pursuant to and subject to the provisions of the Equitrans Midstream Corporation 2018 Long-Term Incentive Plan (as amended from time to time, the “Plan”), and the terms and conditions set forth in this award agreement (this “Agreement”).

The grant of restricted stock under this Agreement shall not be effective unless, no later than 45 days after the Grant Date, (i) Grantee accepts the restricted shares through the Fidelity NetBenefits website, which can be found at www.netbenefits.com, and (ii) to the extent Grantee is not already subject to an agreement with the Company containing covenants regarding confidentiality, non-solicitation, and if required by the Company, non-competition, Grantee executes an agreement containing the applicable covenants that is acceptable to the Company.

When Grantee accepts the restricted shares awarded under this Agreement through the Fidelity NetBenefits website, Grantee shall be deemed to have (i) acknowledged receipt of the restricted shares granted on the Grant Date (the terms of which are subject to the terms and conditions of this Agreement and the Plan) and copies of this Agreement and the Plan, and (ii) agreed to be bound by all the provisions of this Agreement and the Plan.

TERMS AND CONDITIONS

1.Defined Terms. Capitalized terms used herein and not otherwise defined shall have the meanings assigned to such terms in the Plan. In addition, and notwithstanding any contrary definition in the Plan, for purposes of this Agreement:

(a)“Cause” means: (i) Grantee’s conviction of a felony, a crime of moral turpitude or fraud or Grantee’s having committed fraud, misappropriation or embezzlement in connection with the performance of Grantee’s duties; (ii) Grantee’s willful and repeated failures to substantially perform assigned duties; or (iii) Grantee’s violation of any provision of a written employment-related agreement between Grantee and the Company or express significant policies of the Company. If the Company terminates Grantee’s employment for Cause, the Company shall give Grantee written notice setting forth the reason for Grantee’s termination not later than 30 days after such termination.

(b)“Good Reason” means Grantee’s resignation within 90 days after: (i) a reduction in Grantee’s base salary of 10% or more (unless the reduction is applicable to all similarly situated employees); (ii) a reduction in such Grantee’s annual short-term bonus target by the greater of (A) 10% and (B) 5 percentage points of such Grantee’s target bonus percentage, unless the reduction is applicable to all similarly situated employees; (iii) a significant diminution in Grantee’s job responsibilities,

duties or authority; (iv) a Company requested change in the geographic location of Grantee’s primary reporting location of more than 50 miles (but excluding any requirement to work remotely); and/or (v) any other action or inaction that constitutes a material breach by the Company of this Agreement.

A termination by Grantee shall not constitute termination for Good Reason unless Grantee first delivers to the General Counsel of the Company written notice: (i) stating that Grantee intends to resign for Good Reason pursuant to this Agreement; and (ii) setting forth with specificity the occurrence deemed to give rise to a right to terminate for Good Reason (which notice must be given no later than 90 days after the initial occurrence of such event). The Company shall have a reasonable period of time (not less than 30 days) to take action to correct, rescind or substantially reverse the occurrence supporting termination for Good Reason as identified by Grantee. Failure by the Company to act or respond to the written notice shall not be deemed to be an admission that Good Reason exists.

(c)“Pro Rata Amount” is defined in Section 4 of this Agreement.

(d)“Qualifying Change of Control” means a Change of Control (as then defined in the Plan) unless (i) Grantee’s Restricted Shares are assumed by the surviving entity of the Change of Control (or otherwise equitably converted or substituted in connection with the Change of Control in a manner approved by the Committee) or (ii) the Company is the surviving entity of the Change of Control.

(e)“Retirement” means Grantee’s voluntary termination of employment with the Company and its Affiliates after Grantee has (i) a length of service of at least ten (10) years and (ii) a combined age and length of service equal to at least sixty (60) years. Grantee’s length of service will be determined by the Company, in its sole discretion, based on the Company’s internal payroll records. For purposes of this Section 1(e), service with EQT Corporation prior to November 13, 2018 shall be treated the same as service with the Company and its Affiliates, provided that Grantee was assigned to the Company in connection with the separation from EQT Corporation. The termination of Grantee’s employment by the Company shall not qualify as Retirement.

(f)“Restricted Period” means the period prior to the Vesting Date when the Restricted Shares are subject to the restrictions imposed under Section 2.

(g)“Restricted Shares” means the number of restricted shares awarded to Grantee on the Grant Date as designated in the first paragraph of this Agreement.

(h)“Vesting Commencement Date” means January 1, 2022.

(i)“Vesting Date” is defined in Section 3 of this Agreement.

2.    Restrictions. Restricted Shares may not be sold, transferred, exchanged, assigned, pledged, hypothecated or otherwise encumbered. The restrictions imposed under this Section 2 shall apply to all shares of the Company’s Common Stock or other securities issued with respect to Restricted Shares hereunder in connection with any merger, reorganization, consolidation, recapitalization, stock dividend or other change in corporate structure affecting the Common Stock of the Company.

3.    Vesting of Restricted Shares. Except as may be otherwise provided below, including in Section 4, or under any written employment-related agreement with Grantee (including any confidentiality, non-solicitation, non-competition, change of control or similar agreement, as required by the Company), if any, 100% of the Restricted Shares will vest and become non-forfeitable (and the restrictions imposed on the Restricted Shares under Section 2 will expire) on the third anniversary of the Vesting Commencement Date, provided Grantee has continued in the employment of the Company and/or its Affiliates through such date. Any date on which the Restricted Shares vest shall be considered a “Vesting Date.”

Notwithstanding anything to the contrary in this Agreement, if Grantee’s employment is terminated and such termination is voluntary, including a Retirement, and Grantee remains on the board of directors of the Company or any Affiliate of the Company whose equity is publicly traded on the New York Stock Exchange or the NASDAQ Stock Market following such termination of employment, Grantee shall be treated as employed for purposes of this Agreement as long as Grantee remains on such board of directors, in which case any references herein to Grantee’s employment shall be deemed to include his or her continued service on such board.

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4.    Acceleration / Forfeiture in the Event of a Change in Status.

(a)    Notwithstanding Section 9 of the Plan, in the event that following a Change of Control that is not a Qualifying Change of Control, (i) Grantee’s employment is terminated without Cause or (ii) Grantee resigns for Good Reason, in each case prior to the second anniversary of the effective date of the Change of Control, 100% of the Restricted Shares will vest, provided Grantee has continued in the employment of the Company and/or its Affiliates through such termination or resignation date.

As a condition to the vesting of any Restricted Shares pursuant to Section 4(a) above, Grantee will be required to execute and not revoke a full release of claims in a form acceptable to the Company within 30 days of the termination or resignation, as applicable. Failure to satisfy this condition will result in forfeiture of such Restricted Shares.

(b)    Notwithstanding Section 4(a) above, if Grantee’s termination is due to Grantee’s death or Disability, 100% of the Restricted Shares will vest, provided Grantee has continued in the employment of the Company and/or its Affiliates through such date.

As a condition to the vesting of any Restricted Shares pursuant to Section 4(b) above, Grantee (or Grantee’s estate or beneficiary) will be required to execute and not revoke a full release of claims in a form acceptable to the Company within 30 days of the termination. Failure to satisfy this condition will result in forfeiture of such Restricted Shares.

(c)    Notwithstanding Section 4(a) above, if Grantee’s termination is due to Grantee’s Retirement, a pro rata portion of the Restricted Shares will vest (the number of Restricted Shares then vesting is defined as the “Pro Rata Amount”), provided Grantee has continued in the employment of the Company and/or its Affiliates through such date. The Pro Rata Amount shall equal the total number of Restricted Shares granted pursuant to this Agreement multiplied by a fraction, the numerator of which is the number of months of continuous employment with the Company and/or an Affiliate from the Vesting Commencement Date through the date of Grantee’s Retirement and the denominator of which is 36. When determining the Pro Rata Amount, Grantee shall be considered to have been employed with the Company and/or an Affiliate for a full calendar month so long as Grantee is employed by such entity for at least one day during such calendar month.

As a condition to the vesting of any Restricted Shares pursuant to Section 4(c) above, Grantee will be required to execute and not revoke a full release of claims in a form acceptable to the Company within 30 days of the termination. Failure to satisfy this condition will result in forfeiture of such Restricted Shares.

(d)    Except as may be otherwise provided under any written employment-related agreement with Grantee, if any, in the event Grantee’s employment terminates for any other reason at any time prior to the applicable Vesting Date, all of Grantee’s Restricted Shares will immediately be forfeited without further consideration or any act or action by Grantee. For purposes of clarity, in the event Grantee’s employment is terminated other than for performance reasons, the Committee may determine that all or a portion of the Restricted Shares shall vest upon Grantee’s termination.

As a condition to the vesting of any Restricted Shares pursuant to the last sentence of Section 4(d) above, if any, Grantee will be required to execute and not revoke a full release of claims in a form acceptable to the Company within 30 days of the termination. Failure to satisfy this condition will result in forfeiture of such Restricted Shares.

5.    Delivery of Shares. The Restricted Shares will be registered in the name of Grantee as of the Grant Date and may be held by the Company during the Restricted Period in certificated or uncertificated form. If a certificate for Restricted Shares is issued during the Restricted Period, such certificate shall be registered in the name of Grantee and shall bear a legend in substantially the following form (in addition to any legend required under applicable state securities laws): “This certificate and the shares of stock represented hereby are subject to the terms and conditions (including forfeiture and restrictions against transfer) contained in a Restricted Stock Award Agreement between the registered owner of the shares represented hereby and Equitrans Midstream Corporation. Release from such terms and conditions shall be made only in accordance with the provisions of such Award Agreement, copies of which are on file in the offices of Equitrans Midstream Corporation.” To the extent the Company’s shares are certificated,

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stock certificates for the shares, without the first above legend, shall be delivered to Grantee or Grantee’s designee upon request of Grantee after the expiration of the Restricted Period, but delivery may be postponed for such period as may be required for the Company with reasonable diligence to comply, if deemed advisable by the Company, with registration requirements under the Securities Act of 1933, as amended, listing requirements under the rules of any stock exchange, and requirements under any other law or regulation applicable to the issuance or transfer of the Restricted Shares.

6.    Dividends. If the record date for regular dividends or special dividends with respect to the Company’s Common Stock (whether made in cash or stock, unless made in accordance with any shareholder rights plan or similar arrangement) occurs during the period commencing on the Vesting Commencement Date through and including the Vesting Date, the cumulative amount of all regular and special dividends paid during such period on Grantee’s Restricted Shares shall be held and the Grantee shall earn a right to receive a cash payment in respect of such dividends. Any cash payment owed to Grantee pursuant to this Section 6 shall be subject to the same time-vesting conditions and transfer restrictions as apply to the Restricted Shares with respect to which the underlying dividends relate and shall be paid at the same time as the Restricted Shares to which they relate.

7.    Voting Rights. Grantee shall be entitled to vote the Restricted Shares.

8.    Payment of Taxes. The Company or any Affiliate employing Grantee has the authority and the right to deduct or withhold, or require Grantee to remit to the employer, an amount sufficient to satisfy federal, state, and local taxes (including Grantee’s FICA obligation) required by law to be withheld with respect to any taxable event arising as a result of this award. With respect to withholding required upon any taxable event arising as a result of this award, the employer shall satisfy the tax withholding required by withholding shares of Common Stock having a Fair Market Value as of the date that the amount of tax to be withheld is to be determined equal to the amount of tax required to be withheld. The obligations of the Company under this Agreement will be conditional on such payment or arrangements, and the Company and, where applicable, its Affiliates will, to the extent permitted by law, have the right to deduct any such taxes from any payment of any kind otherwise due to Grantee.

9.    Plan Controls. This Agreement and Grantee’s rights hereunder are subject to all the terms and conditions of the Plan and such rules and regulations as the Committee may adopt for administration of the Plan. It is expressly understood that the Committee is authorized to interpret and administer the Plan and this Agreement, and to make all decisions and determinations as it may deem to be necessary or advisable for the administration thereof, all of which shall be final and binding upon Grantee and the Company. In the event of any actual or alleged conflict between the provisions of the Plan and the provisions of this Agreement, the provisions of the Plan shall be controlling and determinative. Any conflict between this Agreement and the terms of a written employment-related agreement with Grantee effective on or prior to the Grant Date shall be decided in favor of the provisions of such employment-related agreement.

10.    Recoupment Policy. The award of Restricted Shares and any amounts paid to Grantee hereunder, and any cash or other benefit acquired on the sale of shares of Common Stock distributed hereunder, shall be subject to the terms and conditions of the Equitrans Midstream Corporation Compensation Recoupment Policy, effective June 17, 2019, as may be amended or restated from time to time, to the extent such policy is applicable to Grantee and the Restricted Shares. A copy of such policy is available upon request from the Company's Corporate Secretary.

11.    Relationship to Other Benefits. The Restricted Shares shall not affect the calculation of benefits under the Company’s or its Affiliates’ qualified retirement plans or any other retirement, compensation or benefit plan or program of the Company or its Affiliates, except to the extent specifically provided in such other plan or program. Nothing herein shall prevent the Company or its Affiliates from maintaining additional compensation plans and arrangements.

12.    Amendment. Subject to the terms of the Plan, this Agreement may be modified or amended by the Committee; provided that no such amendment shall materially and adversely affect the rights of Grantee hereunder without the consent of Grantee. Notwithstanding the foregoing, Grantee hereby expressly agrees to any amendment to the Plan and this Agreement to the extent necessary to comply with

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applicable law or changes to applicable law (including, but not limited to, Code Section 409A) and related regulations or other guidance and federal securities laws.

13.    Successor. All obligations of the Company under the Plan and this Agreement, with respect to the Restricted Shares, shall be binding on any successor to the Company, whether the existence of such successor is the result of a direct or indirect purchase, merger, consolidation, or otherwise, of all or substantially all of the business and/or assets of the Company.

14.    Applicable Law. This Agreement shall be governed by and construed under the laws of the Commonwealth of Pennsylvania without regard to its conflict of law provisions.

15.    Notice. Except as may be otherwise provided by the Plan or determined by the Committee and communicated to Grantee, notices and communications hereunder must be in writing and shall be deemed sufficiently given if either sent by electronic mail, hand-delivered or if sent by overnight courier, or by postage paid first class mail. Notices sent by mail shall be deemed received five business days after mailed, but in no event later than the date of actual receipt. Any notice delivered or made by electronic mail will be deemed to be given on the date of actual delivery as shown by the date of the electronic mail message. Notices shall be directed, if to Grantee, at Grantee’s address (or electronic mail address, as applicable) indicated by the Company’s records or, if to the Company, at the Company’s principal executive office, Attention: Manager, Compensation and Benefits or, if notice is sent to the Company by electronic mail, to TotalRewards@equitransmidstream.com.

16.    Dispute Resolution. Any dispute regarding the payment of benefits under this Agreement or the Plan shall be resolved in accordance with the Equitrans Midstream Corporation Long-Term Incentive Plan Dispute Resolution procedures, effective December 15, 2020, as may be amended or restated from time to time. A copy of such procedures is available upon request from the Company’s Corporate Secretary and is available on the Fidelity NetBenefits website, which can be found at www.netbenefits.com.

17.    Tax Consequences to Grantee. It is intended that: (i) until the applicable Vesting Date occurs, Grantee’s right to payment for an award under this Agreement shall be considered to be subject to a substantial risk of forfeiture in accordance with those terms as defined or referenced in Sections 83(a), 409A and 3121(v)(2) of the Code; and (ii) until the award vests on the applicable Vesting Date, Grantee shall have merely an unfunded, unsecured promise to receive such award.

18.    Plan and Company Information. Grantee may access important information about the Company and the Plan through the Company’s website. Copies of the Plan and Plan Prospectus can be found by logging into the Fidelity NetBenefits website, which can be found at www.netbenefits.com, and clicking on the “Menu” tab followed by the “Stock Plans” tab and then following the prompts to the Plan documents. Copies of the Company’s most recent Annual Report on Form 10-K, Proxy Statement and other information generally delivered to the Company’s shareholders can be found at www.equitransmidstream.com by clicking on the “Investors” link on the main page and then “Financial Reporting” and “SEC Filings.” Paper copies of such documents are available upon request made to the Company’s Corporate Secretary.

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EX-10.47

Exhibit 10.47

AMENDED AND RESTATED EQUITRANS MIDSTREAM CORPORATIONEXECUTIVE SHORT-TERM INCENTIVE PLAN

Section 1.Incentive Plan Purposes. The main purposes of the Amended and Restated Equitrans Midstream Corporation (the “Company”) Executive Short-Term Incentive Plan (the “Plan”) are to maintain a competitive level of total cash compensation by providing the Company’s executives with an opportunity to earn incentives based upon the achievement of performance goals over a specified performance period and to align the interests of the Company’s executives with those of the Company’s shareholders and other stakeholders and with the strategic objectives of the Company.

Section 2.Effective Date; Performance Periods. The Plan was originally effective January 1, 2021 and has subsequently been amended and restated effective January [5], 2022. The Plan will remain in effect until formally amended or terminated in writing by the Company’s Board of Directors (“Board”) or the Management Development and Compensation Committee of the Board (“Committee”) and as provided in Section 14 or the occurrence of a Change of Control as provided in Section 11. Unless otherwise determined by the Committee and subject to Section 11, each performance period under the Plan (each, a “Performance Period”) shall begin on January 1 and end on December 31 of each calendar year.

Section 3.Eligibility. All executive officers of the Company shall be eligible to participate in the Plan (each, a “Participant”). Notwithstanding the foregoing, the Committee may exclude specific executive officers from participation in the Plan in its complete and sole discretion.

Section 4.Administration of the Plan. The Plan shall be administered by the Committee or its delegate. On an annual or periodic basis, as determined by the Committee, for each Performance Period, (i) the Committee shall determine the Performance Metrics, as defined in Section 5, and (ii) the Committee shall set target incentive percentages (the “Target Incentive Percentages”) for all Participants. The Committee shall review the aggregate payout amounts attributable to the Target Incentive Percentages for all Participants for each Performance Period.

Prior to payment of any Award Bonus (as defined in Section 6(b)) for any Performance Period, the Committee shall certify in writing the Performance Metrics achieved and related payout factor earned for such Performance Period, which writing may include meeting minutes of the Committee.

Section 5.Program Metrics.

(a)Each Performance Period shall have specific metrics (the “Performance Metrics”). These Performance Metrics will support the business of the Company, or an affiliate of the Company, as applicable, and be based upon the specific performance measures established for the Performance Period.

(b)The Performance Metrics for each Performance Period shall be determined in writing by the Committee; provided that in no event will Performance

Metrics be established when the outcome of such Performance Metrics is no longer substantially uncertain.

(c)The Performance Metrics determined by the Committee will be objectively determinable goals based upon one or more performance measures determined at the discretion of the Committee, including, by way of example but without limitation, the following:

•earnings per share

•revenue

•expenses

•return on equity

•return on total or invested capital

•return on assets

•earnings (such as net income, EBIT and similar measures)

•cash flow (such as EBITDA, after-tax cash flow, distributable cash flow, free cash flow, retained free cash flow and similar measures)

•share price

•debt reduction or leverage

•gross margin

•operating income

•volumes metrics (such as volumes gathered, transported or processed and similar measures)

•operating efficiency metrics (such as general and administrative (G&A) metrics, unit gathering, compression and water services expenses and other midstream efficiency measures, lost and unaccounted for gas metrics, compressor or processing downtime and similar measures)

•construction efficiency metrics (such as timely completion, cost within budget and similar measures)

•methane reduction or other sustainability metrics

•closing of a transaction

•safety and environmental performance

•total shareholder return

(d)    The Performance Metrics may be based either on the performance of the Company, or an affiliate, branch, department or other portion thereof, for the applicable Performance Period and/or upon a comparison of such performance with the performance of a peer group of corporations and/or partnerships, prior Company performance or other comparative measure selected by the Committee before, at, or, subject to subsection (b) above, after the time of determining each Target Bonus (as defined in Section 6(a)) for the applicable Performance Period. Performance Metrics may be specified in absolute terms, on an adjusted basis, in percentages, or in terms of growth or reduction from period to period or growth or reduction rates over time, as well as measured relative to the performance of a group of comparator companies, or a published or special index, or a stock market index, that the Committee deems appropriate. Performance Metrics need not be based upon an increase or positive result under a business criterion and could include, for example, the maintenance of the status quo, the reduction of expenses or the limitation of economic losses (measured, in each case, by reference to a specific business criterion). Performance Metrics may, but need not, be determinable in conformance with generally accepted accounting principles.

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(e)When the Performance Metrics are determined by the Committee, the weighting assigned to, and the levels of achievement (e.g., Threshold, Target, Maximum) for, if any, each Performance Metric shall be specified. In addition, the Committee may specify that any determination of achievement of the Performance Metrics shall exclude or otherwise objectively adjust for any specified circumstance or event that occurs during the Performance Period, including, by way of example but without limitation, the following: (i) non-recurring, non-operational gains, losses and impairments; (ii) the effect of changes in tax laws, accounting principles or other laws or provisions; and (iii) acquisitions or divestitures.

Section 6.Target and Award Bonuses.

(a)Subject to Section 10(a), a Participant’s target bonus is calculated by multiplying the Participant’s Target Incentive Percentage by such Participant’s annualized base salary as of the first day of the applicable Performance Period (the “Target Bonus”).

(b)A Participant’s award bonus (“Award Bonus”) is determined following the end of the applicable Performance Period. Award Bonuses for each Performance Period are calculated by multiplying (i) the Participant’s Target Bonus by (ii) the payout factor attributable to the actual level of achievement for each Performance Metric.

(c)The Committee shall have no discretion to increase any Award Bonus that would otherwise be payable based upon attainment of the Performance Metrics, but the Committee may in its discretion reduce or eliminate such Award Bonus (including in the event of the fatality of, or a serious injury to, a Company employee or contractor); provided, however, that the exercise of such negative discretion shall not be permitted to result in any increase in the amount of any Award Bonus payable to any other Participant. Notwithstanding the foregoing, the Committee shall have the discretion to designate an aggregate payment amount (a “Discretionary Pool”) that may be paid to any or all of the Participants in such amounts and to such Participants as determined by the CEO in his or her sole discretion; provided that, the Committee must approve any payment from the Discretionary Pool. In the event any payments are made from a Discretionary Pool, the timing of such payments shall be in accordance with the provisions of Section 6(e) or, if applicable, Section 9(d). For purposes of clarity, any payment to a Participant from the Discretionary Pool shall be in excess of the payment amount such Participant is entitled to based upon attainment of the Performance Goals under his or her award.

(d)The maximum aggregate Award Bonus payable to any Participant for any calendar year is $5,000,000.

(e)Except as provided in Section 7 of the Plan, Award Bonuses shall be paid in cash no later than 2½ months after the end of a Performance Period in which the right to payment is no longer subject to a substantial risk of forfeiture; provided, further, that the Committee has determined and certified in writing the extent to which the Performance Metrics have been attained and the Award Bonuses have been earned.

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Section 7.Form of Payment. The Committee may, in its discretion, determine to satisfy, in whole or in part, an obligation for any Award Bonus by issuing, in substitution for a cash payment, in whole or in part, shares of Company common stock having a fair market value (measured as of the date of the Committee’s determination of the payment amount) equal to the cash payment, under and pursuant to the terms of the Equitrans Midstream Corporation 2018 Long-Term Incentive Plan, as amended, modified, and/or supplemented from time to time, or any successor, substitute, or replacement plan (the “LTIP”).

Section 8.Impact on Benefit Plans. Payments under the Plan shall not be considered as earnings for purposes of the Company’s qualified retirement plans or any such retirement or benefit plan unless specifically provided for and defined under such plans or as otherwise determined by the Committee.

Section 9.Tax Consequences.

(a)    It is intended that nothing in this Plan shall cause the Participants in the Plan to be taxed currently under the Constructive Receipt or Economic Benefit Doctrines and as expressed in Sections 451 and 83 of the Internal Revenue Code of 1986, as amended (the “Code”). The terms, requirements and limitations of this Plan shall be interpreted and applied in a manner consistent with such intent.

(b)It is intended that the Award Bonuses payable under the Plan shall either be exempt from the application of, or comply with, the requirements of Section 409A of the Code. The Plan shall be construed in a manner that effects such intent. Nevertheless, the tax treatment of the benefits provided under the Plan or any Award Bonus is not warranted or guaranteed. None of the Company, its affiliates and their respective directors, officers, employees or advisers shall be held liable for any taxes, interest, penalties or other monetary amounts owed by any Participant or other taxpayer as a result of the Plan or any Award Bonus.

(c)Notwithstanding anything in the Plan to the contrary, to the extent that any Award Bonus would constitute non-exempt “deferred compensation” for purposes of Section 409A of the Code and would be payable or distributable under the Plan by reason of the occurrence of a Change of Control, or the Participant’s disability or separation from service, such amount or benefit will not be payable or distributable to the Participant by reason of such circumstance unless the circumstances giving rise to such Change of Control, disability or separation from service meet any description or definition of “change in control event”, “disability” or “separation from service”, as the case may be, in Section 409A of the Code and applicable regulations (without giving effect to any elective provisions that may be available under such definition). This provision does not prohibit the vesting of any Award Bonus upon a change of control, disability or separation from service, however defined. If this provision prevents the payment or distribution of any Award Bonus, such payment shall be made on the date that would have applied absent such designated event or circumstance.

(d)Notwithstanding anything in the Plan to the contrary, to the extent that any Award Bonus would constitute non-exempt “deferred compensation” for purposes of Section 409A of the Code and would otherwise be payable

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under this Plan by reason of a Participant’s separation from service during a period in which the Participant is a Specified Employee (as defined below), then, subject to any permissible acceleration of payment by the Committee under Treas. Reg. Section 1.409A-3(j)(4)(ii) (domestic relations order), (j)(4)(iii) (conflicts of interest), or (j)(4)(vi) (payment of employment taxes): (i) the amount of such non-exempt deferred compensation that would otherwise be payable during the six-month period immediately following the Participant’s separation from service will be accumulated through and paid or provided on the first day of the seventh month following the Participant’s separation from service (or, if the Participant dies during such period, within 30 days after the Participant’s death) (in either case, the “Required Delay Period”); and (ii) the normal payment or distribution schedule for any remaining payments or distributions will resume at the end of the Required Delay Period. For purposes of this Plan, the term “Specified Employee” has the meaning given such term in Code Section 409A and the final regulations thereunder, provided, however, that, as permitted in such final regulations, the Company’s Specified Employees and its application of the six-month delay rule of Code Section 409A(a)(2)(B)(i) shall be determined in accordance with rules adopted by the Board or any committee of the Board, which shall be applied consistently with respect to all nonqualified deferred compensation arrangements of the Company, including this Plan.

Section 10.Change of Status. In making decisions regarding executive officers’ participation in the Plan, the Committee may consider any factors that they may consider relevant. The following guidelines are provided as general guidelines regarding employee status changes:

(a)New Hire, Transfer, Promotion. Newly hired executive officers hired on or prior to September 30 during any Performance Period are eligible to participate in the Plan and earn a pro rata Award Bonus for such Performance Period. Target Incentive Percentages for newly hired Participants are determined by the Committee. Target Incentive Percentages and/or base salaries, as applicable, for employees who are promoted or transferred during a Performance Period may be adjusted to reflect the percentage that would be associated with the new position. Target Incentive Percentages and/or base salaries, as applicable, for executive officers who experience a change in employment status during a Performance Period (e.g., due to a leave of absence, a change to part-time status, or other similar circumstances) may be adjusted to reflect such change in employment status.

(b)     Termination. No amount shall be paid to an executive officer who resigns for any reason before such executive officer’s Award Bonus is paid; provided, however, a pro rata Award Bonus may be paid based on actual performance as of the end of the Performance Period in the event of the executive officer’s termination of employment as a result of his or her death, disability, or retirement (as defined below); provided the executive officer otherwise qualifies for payment of an Award Bonus. In the event that an Award Bonus is paid on behalf of an executive officer who has terminated employment by reason of death, any such payments or other amounts due shall be paid to the executive officer’s estate in accordance with the provisions of Section 6(e) or, if applicable, Section 9(d), but subject to the Committee’s overall discretion as provided in Section 6(c).

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In the event an Award Bonus is paid on behalf of an executive officer who has terminated by reason of disability or retirement, any amount earned shall be paid to Participants on such pro-rata basis in accordance with the provisions of Section 6(e) or, if applicable, Section 9(d), but subject to the Committee’s overall discretion as provided in Section 6(c).

    For purposes of this Section 10(b), “retirement” means a Participant’s voluntary termination of employment with the Company and its subsidiaries after he or she has (i) a length of service of at least ten (10) years and (ii) a combined age and length of service equal to at least sixty (60) years. A Participant’s length of service will be determined by the Company, in its sole discretion, based on the Company’s internal payroll records. For purposes of this Section 10(b), service with EQT Corporation prior to November 13, 2018 shall be treated the same as service with the Company and its subsidiaries, provided that the Participant was assigned to the Company in connection with the separation from EQT Corporation. The termination of a Participant’s employment by the Company shall not qualify as retirement.

    For purposes of this Section 10(b), “disability” shall have the same meaning as under the LTIP.

Nothing in the Plan shall confer any right on any executive officer to continue in the employ of the Company or its affiliates. In the event any payments are made under the guidelines provided in this Section 10, the timing of such payments shall be in accordance with the provisions of Section 6(e) or, if applicable, Section 9(d).

Section 11.Change of Control. In the event of a Change of Control of the Company, as then defined under the LTIP, the Performance Period shall end on the date of the Change of Control, and the Performance Metrics shall be deemed to have been achieved at actual levels for the pro-rata portion of the Performance Period that elapsed through the date of the Change of Control. In such event, any Award Bonus earned shall be paid to Participants on such pro-rata basis in accordance with the provisions of Section 6(e) or, if applicable, Section 9(d), but subject to the Committee’s overall discretion as provided in Section 6(c).

Section 12. Compensation Recoupment Policy. Any Award Bonuses paid to Participants shall be subject to the terms and conditions of the Equitrans Midstream Corporation Compensation Recoupment Policy, effective June 17, 2019, as may be amended, modified, and/or supplemented from time to time and any successor, substitute, or replacement policy thereto. In addition, the Committee may specify in an incentive award agreement that the Participant’s rights, payments and benefits with respect to an incentive award shall be subject to reduction, cancellation, forfeiture or recoupment upon the occurrence of certain specified events, in addition to any otherwise applicable vesting or performance conditions of an incentive award.

Section 13.Dispute Resolution. Any dispute regarding the payment of benefits under the Plan shall be resolved in accordance with the Equitrans Midstream Corporation Short-Term Incentive Plan Dispute Resolution Procedures, effective February 17, 2021, as may be amended or restated from time to time. A copy of any such procedures is available upon request from the Company’s Corporate Secretary and is available on the Benefits Portal of Fidelity Netbenefits, which can be found at www.netbenefits.com.

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Section 14.Amendment or Termination of this Plan. The Board and the Committee shall each have the right to amend or terminate the Plan at any time. No Participant shall have any vested right, interest or entitlement to any Award Bonus hereunder prior to its payment. The Company shall notify affected Participants in writing of any material amendment that, in the Company’s discretion, may adversely affect the Participant or any Plan termination.

Section 15.Governing Law. The validity, interpretation, construction and effect of the Plan and any rules and regulations relating to the Plan shall be governed by the laws of the Commonwealth of Pennsylvania (without regard to the conflicts of laws thereof), and applicable federal law.

Section 16.Withholding. The Company or any of its affiliates shall have the authority and the right to deduct or withhold, or require a Participant to remit to the Company or such affiliate an amount sufficient to satisfy federal, state and local taxes (including the Participant’s FICA obligation) required by law to be withheld.

Section 17.Severability. If any provision of the Plan is or becomes or is deemed invalid, illegal or unenforceable in any jurisdiction, or would disqualify the Plan under any law deemed applicable by the Committee, such provision shall be construed or deemed amended to conform to applicable laws. If such provision cannot be construed or deemed amended without, in the determination of the Committee, materially altering the intent of the Plan, it shall be deleted and the remainder of the Plan shall remain in full force and effect; provided, however, that, unless otherwise determined by the Committee, the provision shall not be construed or deemed amended or deleted with respect to any Participant whose rights and obligations under the Plan are not subject to the law of such jurisdiction or the law deemed applicable by the Committee.

7

EX-21.1

Exhibit 21.1

SUBSIDIARIES OF EQUITRANS MIDSTREAM CORPORATION

(as of December 31, 2021)

Entity	Jurisdiction
EQGP Holdings, LP	Delaware
EQGP Services, LLC	Delaware
EQM Gathering Holdings, LLC	Delaware
EQM Gathering Opco, LLC	Delaware
EQM GP Corporation	Delaware
EQM LP Corporation	Delaware
EQM Midstream Finance Corporation	Delaware
EQM Midstream Management LLC	Delaware
EQM Midstream Partners, LP	Delaware
EQM Olympus Midstream LLC	Delaware
Eureka Midstream Holdings, LLC	Delaware
Eureka Land, LLC	Delaware
Eureka Midstream, LLC	Delaware
Eureka Services Intermediate, LLC	Delaware
Eureka Services, LLC	Delaware
Hornet Midstream Pipeline, LLC	Delaware
Equitrans Gathering Holdings, LLC	Delaware
Equitrans Investments, LLC	Delaware
Equitrans Services, LLC	Delaware
Equitrans, L.P.	Pennsylvania
Equitrans Transaction Sub GP, LLC	Delaware
Equitrans Water Services (PA), LLC	Delaware
Equitrans Water Services (OH), LLC	Delaware
MVP Holdco, LLC	Delaware
Rager Mountain Storage Company LLC	Delaware
RM Partners LP	Delaware

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

•Registration Statement (Form S-8 No. 333-231258) pertaining to the Equitrans Midstream Corporation Employee Savings Plan,

•Registration Statement (Form S-8 No. 333-228338) pertaining to the Equitrans Midstream Corporation Employee Savings Plan,

•Registration Statement (Form S-3 No. 333-234522) pertaining to the registration of Common Stock, Preferred Stock, Debt Securities Offered by the Company and Common Stock Offered by the Selling Shareholders,

•Registration Statement (Form S-3 No. 333-239828) pertaining to the registration of Common Stock and Preferred Stock Offered by the Selling Shareholders,

•Registration Statement (Form S-8 No. 333-228337) pertaining to the Equitrans Midstream Corporation 2018 Long-Term Incentive Plan,

•Registration Statement (Form S-8 No. 333-228340) pertaining to the Equitrans Midstream Corporation Directors’ Deferred Compensation Plan,

•Registration Statement (Form S-8 No. 333-239228) pertaining to the Equitrans Midstream Corporation 2018 Long-Term Incentive Plan, and

•Registration Statement (Form S-3 No. 333-255597) pertaining to the Equitrans Midstream Corporation 2018 Dividend Reinvestment and Stock Purchase Plan;

of our reports dated February 23, 2022, with respect to the consolidated financial statements of Equitrans Midstream Corporation and the effectiveness of internal control over financial reporting of Equitrans Midstream Corporation included in this Annual Report (Form 10-K) of Equitrans Midstream Corporation for the year ended December 31, 2021.

/s/ Ernst & Young LLP    

Pittsburgh, Pennsylvania

February 23, 2022

EX-23.2

Exhibit 23.2

Consent of Independent Auditors

We consent to the incorporation by reference in the following Registration Statements:

•Registration Statement (Form S-8 No. 333-231258) pertaining to the Equitrans Midstream Corporation Employee Savings Plan,

•Registration Statement (Form S-8 No. 333-228338) pertaining to the Equitrans Midstream Corporation Employee Savings Plan,

•Registration Statement (Form S-3 No. 333-234522) pertaining to the registration of Common stock, Preferred stock and Debt securities Offered by the Company and Common Stock Offered by the Selling Shareholders,

•Registration Statement (Form S-3 No. 333-239828) pertaining to the registration of Common Stock and Preferred Stock Offered by the Selling Shareholders,

•Registration Statement (Form S-8 No. 333-228337) pertaining to the Equitrans Midstream Corporation 2018 Long-Term Incentive Plan,

•Registration Statement (Form S-8 No. 333-228340) pertaining to the Equitrans Midstream Corporation Directors’ Deferred Compensation Plan,

•Registration Statement (Form S-8 No. 333-239228) pertaining to the Equitrans Midstream Corporation 2018 Long-Term Incentive Plan, and

•Registration Statement (Form S-3 No. 333-255597) pertaining to the Equitrans Midstream Corporation 2018 Dividend Reinvestment and Stock Purchase Plan;

of our report dated February 23, 2021, with respect to the financial statements of Mountain Valley Pipeline, LLC – Series A included in the Annual Report (Form 10-K) of Equitrans Midstream Corporation for the year ended December 31, 2021.

/s/ Ernst & Young LLP    

Pittsburgh, Pennsylvania

February 23, 2022

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Thomas F. Karam, certify that:

1. I have reviewed this Annual Report on Form 10-K of Equitrans Midstream Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:    February 23, 2022

/s/ Thomas F. Karam

Thomas F. Karam

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Kirk R. Oliver, certify that:

1. I have reviewed this Annual Report on Form 10-K of Equitrans Midstream Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and 

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting. 

Date:    February 23, 2022

/s/ Kirk R. Oliver

Kirk R. Oliver

Senior Vice President and Chief Financial Officer

EX-32

Exhibit 32

CERTIFICATION

In connection with the Annual Report of Equitrans Midstream Corporation on Form 10-K for the period ended December 31, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned certify pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)    The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)    The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Equitrans Midstream Corporation. 

/s/ Thomas F. Karam	February 23, 2022
Thomas F. Karam Chief Executive Officer
/s/ Kirk R. Oliver	February 23, 2022
Kirk R. Oliver Senior Vice President and Chief Financial Officer

EX-99.1

Financial Statements

Mountain Valley Pipeline, LLC – Series A

Years Ended December 31, 2021, 2020 and 2019

With Report of Independent Auditors

Mountain Valley Pipeline, LLC – Series A

Index To Financial Statements

Years Ended December 31, 2021, 2020 and 2019

Report of Independent Auditors        2

Balance Sheets         3

Statements of Operations         4

Statements of Members’ Equity        5

Statements of Cash Flows         6

Notes to Financial Statements        7

Report of Independent Auditors

The Management Committee of Mountain Valley Pipeline, LLC - Series A

We have audited the financial statements of Mountain Valley Pipeline, LLC - Series A (the Company), which comprise the balance sheet as of December 31, 2020 and the related statements of operations, members’ equity and cash flows for the years ended December 31, 2020 and 2019, and the related notes to the financial statements.

Management’s Responsibility for the Financial Statements

Management of the operator of the Company, EQM Gathering Opco, LLC, is responsible for the preparation and fair presentation of these financial statements in conformity with U.S. generally accepted accounting principles; this includes the design, implementation and maintenance of internal control relevant to the preparation and fair presentation of financial statements that are free of material misstatement, whether due to fraud or error.

Auditor’s Responsibility

Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits in accordance with auditing standards generally accepted in the United States. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement.

An audit involves performing procedures to obtain audit evidence about the amounts and disclosures in the financial statements. The procedures selected depend on the auditor’s judgment, including the assessment of the risks of material misstatement of the financial statements, whether due to fraud or error. In making those risk assessments, the auditor considers internal control relevant to the entity’s preparation and fair presentation of the financial statements in order to design audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the entity’s internal control. Accordingly, we express no such opinion. An audit also includes evaluating the appropriateness of accounting policies used and the reasonableness of significant accounting estimates made by management, as well as evaluating the overall presentation of the financial statements.

We believe that the audit evidence we have obtained is sufficient and appropriate to provide a basis for our audit opinion.

Opinion

In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of Mountain Valley Pipeline, LLC - Series A at December 31, 2020, and the results of its operations and its cash flows for the years ended December 31, 2020 and 2019 in conformity with U.S. generally accepted accounting principles.

Other Matter

The accompanying balance sheet of Mountain Valley Pipeline, LLC - Series A as of December 31, 2021 and December 31, 2020, and the related statements of operations, members’ equity and cash flows for each of the three years in the period ended December 31, 2021 are presented for purposes of complying with Rule 3-09 of SEC Regulation S-X; however, Rule 3-09 does not require the 2021 financial statements to be audited. The 2021 financial statements are unaudited and the 2021 financial statements are not covered by this report.

/s/ Ernst & Young LLP

Pittsburgh, Pennsylvania

February 23, 2021

2

MOUNTAIN VALLEY PIPELINE, LLC - SERIES A

BALANCE SHEETS

DECEMBER 31,

($ in thousands)	2021		2020
	(Unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	26,358	$	146,053
Capital contributions due from members	122,460		—
Other current assets	2		1
Total current assets	148,820		146,054
Property, plant and equipment:
Construction work in process	6,429,792		5,844,594
Other assets	2,496		3,704
Total assets	$	6,581,108	$	5,994,352
LIABILITIES AND MEMBERS' EQUITY
Current liabilities:
Accounts payable	$	157,432	$	213,959
Due to related parties	2,851		2,823
Total current liabilities	160,283		216,782
Environmental reserve	48		304
Total liabilities	160,331		217,086
Members' equity	6,420,777		5,777,266
Total liabilities and members' equity	$	6,581,108	$	5,994,352

The accompanying notes are an integral part of these financial statements.

3

MOUNTAIN VALLEY PIPELINE, LLC - SERIES A

STATEMENTS OF OPERATIONS

YEARS ENDED DECEMBER 31,

($ in thousands)	2021		2020		2019
	(Unaudited)
Environmental expense	$	68	$	360	$	2,416
Legal expense	331		—		—
Allowance for equity funds used during construction	26,722		352,323		245,890
Interest income:
Allowance for borrowed funds used during construction	11,452		150,995		105,382
Other interest	18		288		6,243
Total interest income	11,470		151,283		111,625
Net income	$	37,793	$	503,246	$	355,099

The accompanying notes are an integral part of these financial statements.

4

MOUNTAIN VALLEY PIPELINE, LLC - SERIES A

STATEMENTS OF MEMBERS' EQUITY

(2021 UNAUDITED)

	MVP Holdco, LLC		US Marcellus Gas Infrastructure, LLC		Con Edison Gas Pipeline and Storage, LLC		WGL Midstream, Inc.		RGC Midstream, LLC		Total
($ in thousands)
Balance at January 1, 2019	$	1,462,000	$	995,957	$	400,833	$	321,180	$	32,096	$	3,212,066
Capital contributions and changes in ownership interest(a)	610,257		415,779		155,214		132,740		13,413		1,327,403
Less: Capital contributions due from members(b)	(33,845)		(23,060)		—		(6,405)		(744)		(64,054)
Net income	161,576		110,085		44,377		35,510		3,551		355,099
Balance at December 31, 2019	2,199,988		1,498,761		600,424		483,025		48,316		4,830,514
Capital contributions and changes in ownership interest(a)	242,563		165,263		—		45,907		5,331		459,064
Less: Capital contributions due from members(b)	(8,221)		(5,601)		—		(1,556)		(180)		(15,558)
Net income	230,652		157,147		60,053		50,324		5,070		503,246
Balance at December 31, 2020	2,664,982		1,815,570		660,477		577,700		58,537		5,777,266
Capital contributions and changes in ownership interest(a)	320,034		218,044		35		60,572		7,033		605,718
Net income	17,579		11,977		4,072		3,779		386		37,793
Balance at December 31, 2021	$	3,002,595	$	2,045,591	$	664,584	$	642,051	$	65,956	$	6,420,777

(a) Includes capital contributions due from members for a total amount of $122,460, zero and $12,749 as of December 31, 2021, 2020 and

2019 respectively that as of the date of issuance of the respective financial statements, such contributions due from members have been

received.    

(b) Represents capital contributions due from members as of December 31, 2020, and 2019 that were unpaid as of the date of issuance of the

respective financial statements. No capital contributions due from members as of December 31, 2021 were unpaid as of the date of issuance.

The accompanying notes are an integral part of these financial statements.

5

MOUNTAIN VALLEY PIPELINE, LLC - SERIES A

STATEMENTS OF CASH FLOWS

YEARS ENDED DECEMBER 31,

($ in thousands)	2021		2020		2019
	(Unaudited)
Cash flows from operating activities:
Net income	$	37,793	$	503,246	$	355,099
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Allowance for funds used during construction (AFUDC)	(38,174)		(503,319)		(351,272)
Changes in operating assets and liabilities:
Other assets	(1)		70		(61)
Environmental reserve	(256)		304
Net cash (used in) provided by operating activities	(638)		301		3,766
Cash flows from investing activities:
Capital expenditures	(602,315)		(400,321)		(1,780,466)
Net cash used in investing activities	(602,315)		(400,321)		(1,780,466)
Cash flows from financing activities:
Capital contributions from members	483,258		456,254		1,564,805
Net cash provided by financing activities	483,258		456,254		1,564,805
Net change in cash and cash equivalents	(119,695)		56,234		(211,895)
Cash and cash equivalents at the beginning of the year	146,053		89,819		301,714
Cash and cash equivalents at the end of the year	$	26,358	$	146,053	$	89,819

The accompanying notes are an integral part of these financial statements.

6

Mountain Valley Pipeline, LLC – Series A

Notes To Financial Statements

(2021 Unaudited)

1.    Description of Business

Mountain Valley Pipeline, LLC is a limited liability company formed to develop, construct, own and operate natural gas assets. Mountain Valley Pipeline, LLC – Series A (the Company) is a series of Mountain Valley Pipeline, LLC under Delaware law, formed to construct, own and operate an interstate natural gas pipeline and related facilities (the MVP mainline). The MVP mainline will span approximately 300 miles from northern West Virginia to southern Virginia and will be regulated by the Federal Energy Regulatory Commission (FERC). The MVP mainline will be operated by EQM Gathering Opco, LLC (EQM Gathering), an indirect wholly-owned subsidiary of Equitrans Midstream Corporation (ETRN), pursuant to an Amended and Restated Construction, Operation and Management Agreement, dated as of June 16, 2015, among the Company and EQM Gathering (the COM Agreement).

The Company’s members consist of MVP Holdco, LLC (MVP Holdco), an indirect wholly-owned subsidiary of ETRN, US Marcellus Gas Infrastructure, LLC (NextEra), Con Edison Gas Pipeline and Storage, LLC (ConEd), WGL Sustainable Energy LLC (f/k/a WGL Midstream, Inc.) (AltaGas) and RGC Midstream, LLC (RGC). On November 4, 2019, ConEd exercised its option to cap its investment in the Company at approximately $530 million (excluding allowance for funds used during construction (AFUDC)). ETRN and NextEra Energy, Inc. are obligated, and RGC has opted, to fund the shortfall in ConEd's capital contributions on a pro rata basis. Any funding of the shortfall by such members will correspondingly increase their respective interests in the Company and decrease ConEd’s interest in the Company.

As of December 31, 2021, each member’s ownership interest in the Company was as follows: MVP Holdco (46.84%), NextEra (31.91%), ConEd (10.22%), AltaGas (10.00%) and RGC (1.03%).

2.    Significant Accounting Policies

Use of Estimates: The preparation of financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Cash and Cash Equivalents: Cash and cash equivalents include cash and interest-bearing deposits having original maturities of three months or less.

Capital Contributions Due from Members: Capital contributions due from members are recorded within current assets when there is substantial evidence of the ability and intent to collect the contribution within a reasonably short period of time and such amounts have been received prior to the date the financial statements were available to be issued. Capital contributions due from members that have not been received prior to the date the financial statements were available to be issued are presented in the balance sheet as a deduction from members’ equity.

Property, Plant and Equipment (PP&E): Property, plant and equipment is stated at cost. The Company capitalizes the carrying costs for the construction of its long-term assets and will amortize these costs over the estimated useful life of the related assets once placed in service. As of December 31, 2021 and 2020, all amounts capitalized relate to construction work in process. The capitalized cost of additions to property, plant and equipment includes indirect costs such as engineering, supervision, payroll taxes, other benefits and AFUDC.

The calculated AFUDC includes capitalization of the cost of debt for financing construction of assets subject to regulation by the FERC (the debt component) and the designated cost of equity for financing the construction of these regulated assets (the equity component). The rate used for AFUDC was determined in accordance with regulations of the FERC and is compounded semiannually. The debt component of AFUDC is recorded as interest income on the accompanying statements of operations.

In January 2021, the Company temporarily suspended AFUDC on the MVP mainline due to a temporary reduction in growth construction activities. During the second quarter of 2021, the Company resumed some AFUDC related to certain growth construction activities that resumed on the MVP mainline.

The Company accrues capital expenditures when work has been completed but the associated invoices have not yet been paid. These accrued amounts are excluded from capital expenditures on the statements of cash flows until they are paid in a subsequent period. Accrued capital expenditures included in accounts payable and due to related parties in the accompanying balance sheets were approximately $160.3 million and $216.8 million as of December 31, 2021 and 2020, respectively.

7

Mountain Valley Pipeline, LLC – Series A

Notes To Financial Statements

(2021 Unaudited)

Regulatory Accounting: The Company is constructing and will operate assets that will be regulated by the FERC. The rates that will be charged by the Company are reviewed and approved by the FERC, and it is reasonable to assume the rates are set at levels that will recover the entity's costs. As such, the Company applies the provisions of Financial Accounting Standards Board (FASB) Accounting Standards Codification 980, Regulated Operations (ASC 980). The Company reviews, at least annually, to determine whether the Company continues to meet the criteria to apply ASC 980.

Asset Retirement Obligations: The Company is under no legal or contractual obligation to restore or dismantle the MVP mainline. After completing construction and starting operations, the Company intends to operate the MVP mainline as long as supply and demand for natural gas exists, which the Company expects for the foreseeable future. As a result, the Company does not have any asset retirement obligations as of December 31, 2021 and 2020.

Income Taxes: The Company is treated as a partnership for federal and state income tax purposes and does not incur income taxes. Instead, its earnings and losses are included in the tax returns of its members.

Allocation of Profits and Losses: The Company’s profits and losses are allocated in accordance with the members’ respective ownership interests in the Company.

Leases: Right-of-use assets represent the right to use the underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. Right-of-use assets and lease liabilities are recognized on the consolidated balance sheets at the lease commencement date based on the present value of lease payments over the lease term. The Company determines if an arrangement is a lease at inception based on whether the Company has the right to control the use of an identified asset, the right to obtain substantially all of the economic benefits from the use of the asset and the right to direct the use of the asset during the lease term and accounts for leases in accordance with ASC 842, Leases (ASC 842).

Leases in which the Company is the lessee that do not have a readily determinable implicit rate utilize an incremental borrowing rate, based on the information available at the lease commencement date, to determine the present value of lease payments. When a secured borrowing rate is not readily available, unsecured borrowing rates are adjusted for the effects of collateral to determine the incremental borrowing rate. The Company reassesses the incremental borrowing rate for any new and modified lease contracts as of the contract effective date. Lease expense is recognized on a straight-line basis over the lease term for operating leases.

The Company did not have any leases as of December 31, 2021 and 2020.

3.    Legal and Regulatory Matters

The MVP mainline will be governed by the United States Natural Gas Act (NGA), which requires a Certificate of Public Convenience and Necessity from the FERC before construction can commence. On October 13, 2017, the FERC issued a Certificate of Public Convenience and Necessity to the Company. In the first quarter of 2018, the Company received its first partial notice to proceed from the FERC to begin construction activities on certain facilities and commenced construction. There are several pending challenges, as discussed below, to certain aspects of the MVP mainline that must be resolved before the MVP mainline can be completed. The Company is working to respond to the court and agency decisions and obtain and maintain, as applicable, all permits.

Sierra Club, et al. Petitioners v. State Water Control Board, et al. Respondents and Mountain Valley Pipeline, Intervenor, Docket No. 21-2425, Fourth Circuit Court of Appeals (Fourth Circuit). On December 20, 2021, the Virginia Department of Environmental Quality (VADEQ) certified that the MVP mainline would satisfy Virginia’s water quality standards based on its comprehensive nine-month review of the Company’s Joint Permit Application (VA 401 Permit). On December 22, 2021, Petitioners filed their petition challenging the VADEQ’s approval of the VA 401 Permit with the Fourth Circuit. On December 22, 2021, the Petitioners filed a request for an administrative stay with the VADEQ which was denied on January 4, 2022. On January 4, 2022, the Petitioners filed a petition with the Fourth Circuit seeking a judicial stay of the VA 401 Permit pending a decision on the merits. On February 11, 2022, Petitioners withdrew the stay petition.

8

Mountain Valley Pipeline, LLC – Series A

Notes To Financial Statements

(2021 Unaudited)

Sierra Club, et al. Petitioners v. West Virginia Department of Environmental Protection, et Al. Respondents and Mountain Valley Pipeline, Intervenor, Docket No. 22-1008, Fourth Circuit. On December 30, 2021, the West Virginia Department of Environmental Protection (WVDEP) certified that the MVP mainline would satisfy West Virginia’s water quality standards based on its comprehensive nine-month review of the Company’s Joint Permit Application (WV 401 Permit). On January 3, 2022, Petitioners filed their petition challenging the WVDEP’s approval of the WV 401 Permit with the Fourth Circuit. On January 4, 2022, the Petitioners filed a request for an administrative stay with the WVDEP which was denied on January 11, 2022. On January 11, 2022, Petitioners filed a petition with the Fourth Circuit seeking a judicial stay of the WV 401 Permit pending a decision on the merits. The stay petition was denied by the Fourth Circuit on February 8, 2022.

Jefferson National Forest Crossing and Associated Authorizations. In a different Fourth Circuit appeal, Sierra Club, et al. v. U.S. Forest Service, et al., consolidated under Case No. 17-2399, Fourth Circuit, filed in December 2017, the Sierra Club challenged a Bureau of Land Management (BLM) decision to grant a right-of-way to the Company and a U.S. Forest Service (USFS) decision to amend its management plan to accommodate the MVP mainline, both of which affect the MVP mainline's approximate 3.5-mile segment in the Jefferson National Forest (JNF) in Virginia. On July 27, 2018, agreeing in part with the Sierra Club, the Fourth Circuit vacated the BLM and USFS decisions, finding fault with the BLM's analysis of the practicality of alternate routes and the USFS' analysis of erosion and sedimentation effects. The USFS published a draft Supplemental Environmental Impact Statement (SEIS) to the 2017 FERC Final Environmental Impact Statement for MVP mainline in the Federal Register on September 25, 2020 with a public comment period that closed on November 9, 2020. On December 11, 2020, the USFS published a Final SEIS that addressed the issues raised in the prior proceedings and evaluated the most recent sedimentation analysis submitted to the agency consistent with the findings presented in MVP mainline's Biological Opinion and Incidental Take Statement issued by the Department of the Interior's Fish and Wildlife Service (FWS) on September 4, 2020. See Appalachian Voices, et al. v. U.S. Dep’t of Interior below for additional information. On January 11, 2021, the Company received final approval of the Record of Decision from the USFS and, on January 15, 2021, the BLM issued the required right-of-way permit for the MVP mainline's 3.5-mile segment in the JNF in Virginia (the JNF Right-of-Way). On January 11, 2021, Sierra Club, et al. filed a petition with the Fourth Circuit to reverse the USFS approval of the Record of Decision and, on January 15, 2021, filed a petition with the Fourth Circuit challenging BLM’s grant of the JNF Right-of-Way. See Wild Virginia, et al. v. United States Forest Service, et al., No. 21-1039(L). The Fourth Circuit consolidated the challenges to the Record of Decision and the JNF Right-of-Way and briefing was completed. Oral argument occurred on October 29, 2021. On January 25, 2022, the Fourth Circuit, agreeing in part with the petitioners, vacated and remanded the Record of Decision and the JNF Right-of-Way, finding fault with (i) the USFS’ and BLM’s consideration of certain data from the U.S. Geological Survey and (ii) the USFS’ and BLM’s authorization of the use of conventional bores for stream crossings within the JNF based on a variance issued by the FERC, and, as a result of such issues, (iii) the USFS’ amendments in connection with the Record of Decision to the Jefferson Forest plan. The vacatur of the Record of Decision and the JNF Right-of-Way may result in appellate and/or additional agency proceedings (the outcome of which the Company cannot predict) and has caused a delay in the targeted full in-service date for the MVP mainline (and consequent impacts relating to such delay). The Company cannot predict whether and when any new authorizations will be received from the USFS and BLM and, if received, the result of any challenge to such authorizations.

On August 3, 2018, citing the court's vacatur and remand in Sierra Club, et al. v. U.S. Forest Service, et al., consolidated under Case No. 17-2399, the FERC issued a stop work order for the entire pipeline pending the agency actions on remand. The FERC modified its stop work order on August 29, 2018 to allow work to continue on all but approximately 25 miles of the project (the Exclusion Zone). On October 10, 2018, the Fourth Circuit granted a petition for rehearing filed by the Company for the limited purpose of clarifying that the July 27, 2018 order did not vacate the portion of the BLM's Record of Decision authorizing a right-of-way and temporary use permit for the MVP mainline to cross the Weston and Gauley Bridge Turnpike Trail in Braxton County, West Virginia. On October 15, 2018, the Company filed with the FERC a request to further modify the August 3, 2018 stop work order to allow the Company to complete the bore and install the pipeline under the Weston and Gauley Bridge Turnpike Trail. On October 24, 2018, the FERC granted the Company's request to further modify the stop work order and authorize construction. Additionally, on October 9, 2020, the FERC authorized construction to resume project-wide (as it had been stopped by the FERC on October 15, 2019 in relation to a separate matter discussed below), other than with respect to the Exclusion Zone, which requires additional authorization. On December 17, 2020, the FERC again modified the stop work order and authorized construction to resume in 17 miles of the Exclusion Zone. The Company cannot guarantee whether or when the FERC will act in respect of any or all of the remaining portions of the Exclusion Zone. The FERC's October 9, 2020 and December 17, 2020 actions are the subject of challenges filed

9

Mountain Valley Pipeline, LLC – Series A

Notes To Financial Statements

(2021 Unaudited)

by the Sierra Club in Sierra Club, et al. v. FERC, Case No. 20-1512 (consolidated with No. 21-1040), D.C. Circuit Court of Appeals on December 22, 2020 and January 25, 2021, respectively (a stay request filed by the Sierra Club on January 29, 2021 was denied by the Court of Appeals for the D.C. Circuit (DC Circuit) on February 19, 2021). Briefing in Sierra Club, et al. v. FERC, Case No. 20-1512 (consolidated with No. 21-1040), D.C. Circuit Court of Appeals was completed in January 2022 and oral argument is scheduled for April 7, 2022.

Challenges to FERC Certificate, Court of Appeals for DC Circuit. Multiple parties have sought judicial review of the FERC's order issuing a certificate of public convenience and necessity to the Company and/or the exercise by the Company of eminent domain authority. On February 19, 2019, the DC Circuit issued an order rejecting multiple consolidated petitions seeking direct review of the FERC order under the NGA and certain challenges to the exercise by the Company of eminent domain authority in Appalachian Voices, et al. v. FERC, et al., consolidated under Case No. 17-1271. No petitions for rehearing or petitions for rehearing en banc were filed by the April 5, 2019 deadline. The mandate was issued on April 17, 2019. Another group of parties filed a complaint in the U.S. District Court for the District of Columbia asserting that the FERC's order issuing certificates is unlawful on constitutional and other grounds in Bold Alliance, et al. v. FERC, et al., Case No. 17-1822. The district court plaintiffs sought declaratory relief as well as an injunction preventing the Company from developing its project or exercising eminent domain authority. In December 2017 and January 2018, the FERC and the Company, respectively, moved to dismiss the petitions for lack of subject matter jurisdiction. The court granted the motion and dismissed plaintiffs' complaint on September 28, 2018. On October 26, 2018, plaintiffs appealed the decision in Case No. 17-1822 to the DC Circuit in Bold Alliance, et al. v. FERC, et al., Case No. 18-5322. On December 3, 2018, the FERC, as appellee, filed a joint motion with the appellants to hold Case No. 18-5322 in abeyance pending completion of the appeals of the final agency orders related to the MVP mainline certificate in consolidated Case No. 17-1271 and Atlantic Coast Pipeline’s (ACP) certificate. The Company filed a motion to dismiss the case as to some of the plaintiffs. On February 15, 2019, the DC Circuit entered an order holding this appeal in abeyance pending rulings on the appeals from the ACP and MVP mainline FERC proceedings. Although the members of the ACP project announced the cancellation of that project on July 5, 2020, ACP's proceeding remains pending. Case No. 18-5322 remains in abeyance. Similarly, another group of parties filed a complaint in the U.S. District Court for the District of Columbia in Bohon et al. v. FERC et al., Case No. 20-00006, asserting that the delegation of authority to FERC under the NGA violates the nondelegation doctrine and separation-of-powers principle of the U.S. Constitution. The Company and the FERC filed motions to dismiss which were granted by the court. On July 6, 2020, the landowners filed a notice of appeal to the DC Circuit in Case No. 20-5203. On November 30, 2020, appellants asked the DC Circuit to overturn the decision of the lower court. Oral argument before the DC Circuit was scheduled for March 29, 2021, but the court cancelled and held oral argument in abeyance and directed the parties to file motions to govern future proceedings following a decision by the U.S. Supreme Court in PennEast Pipeline Co. v. New Jersey, Case No. 19-1039, which decision was published on June 29, 2021. Briefing in Bohon et al. v. FERC et al., Case No. 20-00006 on the significance of the PennEast Pipeline Co. opinion was completed on July 29, 2021. The DC Circuit issued an order on September 15, 2021 denying appellants' motion for summary reversal of the decision of the lower court and supplemental briefing was completed as of October 6, 2021. Oral argument occurred on December 15, 2021 and the parties are awaiting a decision. Due to the uncertainty regarding the timing of permitting and the outcome of legal challenges facing the MVP mainline, on August 25, 2020, the Company filed a request with the FERC for and, on October 9, 2020, the FERC granted, an extension of time to complete the MVP mainline for an additional two years through October 13, 2022. On December 22, 2020, a challenge to the FERC’s action to grant an extension of time to complete the MVP mainline was filed in the DC Circuit in Sierra Club, et al. v. FERC, Case No. 20-1512 (consolidated with No. 21-1040, DC Circuit). On January 29, 2021, Sierra Club requested a stay of the FERC’s action to grant the Company an extension of time to complete the MVP mainline from the DC Circuit, which stay request was denied by the DC Circuit on February 19, 2021. Briefing in Sierra Club, et al. v. FERC, Case No. 20-1512 (consolidated with No. 21-1040, D.C. Circuit), was completed in January 2022 and oral argument is scheduled for April 7, 2022.

Appalachian Voices, et al. v. U.S. Dep’t of Interior, et al., Fourth Circuit Court of Appeals, Case No. 20-2159. In August 2019, Wild Virginia and certain other petitioners filed a petition in the Fourth Circuit in Wild Virginia et al. v. United States Department of the Interior; Case No. 19-1866, to challenge the Company’s Biological Opinion and Incidental Take Statement issued by FWS which was approved in November 2017 (the Original BiOp). On October 11, 2019, the Fourth Circuit issued an order approving the petitioners’ requested stay of the Original BiOp and holding the litigation in abeyance until January 11, 2020. On October 15, 2019, the FERC issued an order requiring the Company to cease all forward-construction progress (the FERC modified this order on October 9, 2020 and December 17, 2020, which the Sierra Club has appealed to the DC Circuit as discussed above under "Jefferson

10

Mountain Valley Pipeline, LLC – Series A

Notes To Financial Statements

(2021 Unaudited)

National Forest Crossing and Associated Authorizations"). On September 4, 2020, FWS issued the Company a new Biological Opinion and Incidental Take Statement (the New BiOp) for the MVP mainline and the Fourth Circuit subsequently dismissed the litigation regarding the Original BiOp. On October 27, 2020, Appalachian Voices et al. filed a petition with the Fourth Circuit challenging the New BiOp and filed a request for an administrative stay of the New BiOp with FWS, which FWS subsequently denied. On November 2, 2020, the petitioners filed a motion to stay the New BiOp with the Fourth Circuit. On November 18, 2020, the Fourth Circuit issued an order denying the requested stay. The matter was fully briefed as of March 19, 2021. Oral argument occurred on October 29, 2021. On February 2, 2022, the Fourth Circuit vacated and remanded the New BiOp holding, in part, that the FWS did not adequately analyze the environmental context for species at issue. The vacatur of the New BiOp may result in appellate and/or additional agency proceedings (the outcome of which the Company cannot predict) and has caused a delay in the targeted full in-service date for the MVP mainline (and consequent impacts relating to such delay).

FERC Rulemaking on Construction Commencement. The Company is a party to a FERC rulemaking proceeding that may potentially affect when the Company is permitted to commence the crossings of streams and wetlands utilizing trenchless construction methods to effect approximately 120 water crossings following issuance by FERC of an amended Certificate for the MVP mainline. On May 4, 2021, the FERC issued Order No. 871-B. Order No. 871-B and its predecessors relate to an industry-wide rulemaking regarding construction commencement while a rehearing request is pending before the FERC. The Company filed a request for clarification or rehearing of the certificate amendment aspects of Order No. 871-B with the FERC on June 3, 2021. The FERC issued Order No. 871-C on August 2, 2021.

4. Related-Party Transactions

In the ordinary course of business, the Company has transactions with related parties. Pursuant to the COM Agreement, EQM Gathering was engaged by the Company as operator of the MVP mainline to perform certain tasks related to the MVP mainline development, construction, marketing and operation. Costs incurred by EQM Gathering and its affiliates related to development, construction, marketing and operation of the MVP mainline are reimbursed by the Company under the terms of the COM Agreement. As of December 31, 2021 and 2020, amounts due to EQM Gathering and its affiliates pursuant to the COM Agreement were approximately $2.9 million and $2.8 million, respectively. The Company is also a party to a Verified Emission Reduction Purchase Agreement dated July 21, 2021 with an affiliate of NextEra.

Excluding MVP Holdco, each member or an affiliate of each member of the Company has entered into a 20-year transportation service agreement with the Company to transport natural gas on the MVP mainline once it is placed in service. Under these transportation service agreements, the Company contracted a total of 0.6 Bcf per day of firm capacity on the MVP mainline.

5. Commitments and Contingencies

The Company has commitments with various contractors and vendors to provide materials and services associated with construction of the MVP mainline. Future payments associated with these commitments as of December 31, 2021 totaled $1.3 billion. The Company expects to pay the majority of this amount in 2023.

In the ordinary course of business, various legal and regulatory claims and proceedings may be pending or threatened against the Company. While the amounts claimed may be substantial, the Company is unable to predict with certainty the ultimate outcome of such claims and proceedings. The Company accrues legal and other direct costs related to loss contingencies when actually incurred. The Company establishes reserves when it believes it to be appropriate for pending matters and, after consultation with counsel and giving appropriate consideration to available insurance, the Company believes that the ultimate outcome of any matter currently pending against the Company, excluding the legal and regulatory matters described in Note 3, will not materially affect the Company’s business, financial condition, results of operations or liquidity.

The Company has been participating in condemnation proceedings in West Virginia and Virginia. As part of the proceedings, the Company was required to make a cash deposit equal to approximately three times the fair market value of the condemned parcels to ensure sufficient funds were available to pay each landowner. The amount in excess of the approximate fair values represents the amount the Company estimates will be refunded as the parcels are settled or condemned through the condemnation proceedings. The condemnation asset included in other assets in the accompanying balance sheets was approximately $2.5 million and $3.7 million as of December 31, 2021 and 2020, respectively.

11

Mountain Valley Pipeline, LLC – Series A

Notes To Financial Statements

(2021 Unaudited)

6. Guarantees and Letters of Credit

Pursuant to the Company’s limited liability company agreement (the LLC Agreement), each member of the Company is obligated to provide a form of performance assurance in an amount equal to 33% of its proportionate interest in the remaining obligations to make capital contributions to the Company associated with the most recently approved construction budget, less, subject to certain limits, any credit assurances issued by any affiliate of such member under such affiliate’s precedent agreement. Pursuant to the terms of the LLC Agreement, such performance assurances may take the form of a guarantee, a letter of credit or cash collateral.

In the first quarter of 2020, the credit ratings for EQM Midstream Partners, LP (EQM), a subsidiary of ETRN, were downgraded by certain credit rating agencies. As a result, MVP Holdco was obligated to deliver new performance assurances in the form of a letter of credit to the Company, which letter of credit was originally in the amount of approximately $220.2 million. In connection with delivering such letter of credit as a replacement performance assurance, MVP Holdco’s performance guarantee associated with the Company was terminated. During the fourth quarter of 2020, based on the midpoint of the targeted project cost, MVP Holdco delivered a replacement letter of credit with respect to the MVP mainline in the amount of approximately $231.2 million.

As of December 31, 2021, such performance assurances totaled approximately $287.9 million, composed of an aggregate of approximately $68.2 million in member guarantees and approximately $219.7 million in member letter of credit. As of December 31, 2020, such performance assurances totaled approximately $299.4 million, composed of an aggregate of approximately $68.2 million in member guarantees and approximately $231.2 million in member letter of credit.

7. Subsequent Events

Subsequent events have been evaluated through February 23, 2022, the date the financial statements were available to be issued.

12

XML

Cover - USD ($) shares in Thousands, $ in Billions	12 Months Ended
	Dec. 31, 2021	Jan. 31, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End	--12-31
Entity File Number	001-38629
Entity Registrant Name	EQUITRANS MIDSTREAM CORPORATION
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	83-0516635
Entity Address, Address Line One	2200 Energy Drive
Entity Address, City or Town	Canonsburg
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15317
City Area Code	724
Local Phone Number	271-7600
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	ETRN
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 3.4
Entity Common Units, Unit Outstanding		432,676
Entity Central Index Key	0001747009
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Documents Incorporated by Reference	The Company's definitive proxy statement relating to the 2022 annual meeting of shareholders will be filed with the Securities and Exchange Commission within 120 days after the close of the Company's fiscal year ended December 31, 2021 and is incorporated by reference in Part III to the extent described therein.

XML

Audit Information	12 Months Ended
	Dec. 31, 2021
Audit Information [Abstract]
Auditor Firm ID	42
Auditor Name	Ernst & Young LLP
Auditor Location	Pittsburgh, Pennsylvania

XML

Statements of Consolidated Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Operating revenues		$ 1,317,037	$ 1,510,825	$ 1,630,242
Operating expenses:
Operating and maintenance		153,426	154,109	165,367
Selling, general and administrative		138,647	129,969	112,915
Separation and other transaction costs		0	23,797	26,080
Depreciation		270,404	259,613	227,364
Amortization of intangible assets		64,819	63,195	53,258
Impairments of long-lived assets and equity method investments		56,178	55,581	969,258
Total operating expenses		683,474	686,264	1,554,242
Operating income		633,563	824,561	76,000
Equity income	[1]	17,579	233,833	163,279
Impairment of equity method investment		(1,926,402)	0	0
Other (expense) income, net		(16,104)	17,225	2,661
Loss on extinguishment of debt		(41,025)	(24,864)	0
Net interest expense		(378,650)	(307,380)	(256,195)
(Loss) income before income taxes		(1,711,039)	743,375	(14,255)
Income tax (benefit) expense		(345,091)	105,331	50,704
Net (loss) income		(1,365,948)	638,044	(64,959)
Net (loss) income attributable to Equitrans Midstream		14,530	214,912	138,784
Net (loss) income attributable to Equitrans Midstream		(1,380,478)	423,132	(203,743)
Preferred dividends		58,512	58,760	0
Net (loss) income attributable to Equitrans Midstream common shareholders		$ (1,438,990)	$ 364,372	$ (203,743)
Basic:
(Loss) earnings per share of common stock attributable to Equitrans Midstream common shareholders (in dollars per share)		$ (3.32)	$ 1.06	$ (0.80)
Weighted average common stock outstanding (in shares)		433,008	343,935	254,884
Diluted:
(Loss) earnings per share of common stock attributable to Equitrans Midstream common shareholders (in dollars per share)		$ (3.32)	$ 1.06	$ (0.80)
Weighted average common stock outstanding (in shares)		433,008	343,975	254,884
Net (loss) income		$ (1,365,948)	$ 638,044	$ (64,959)
Other comprehensive loss, net of tax:
Pension and other post-retirement benefits liability adjustment, net of tax expense of $62, $70 and $70		(175)	(203)	(517)
Other comprehensive loss		(175)	(203)	(517)
Comprehensive (loss) income		(1,366,123)	637,841	(65,476)
Less: Comprehensive income attributable to noncontrolling interests		14,530	214,912	138,784
Less: Comprehensive income attributable to preferred dividends		58,512	58,760	0
Comprehensive (loss) income attributable to Equitrans Midstream common shareholders		$ (1,439,165)	$ 364,169	$ (204,260)
Dividends declared per common share (in dollars per share)		$ 0.60	$ 0.60	$ 1.80

[1] Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note 9.

XML

Statements of Consolidated Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Pension and other post-retirement benefits liability adjustment, tax expense	$ 62	$ 70	$ 70

XML

Statements of Consolidated Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net (loss) income		$ (1,365,948)	$ 638,044	$ (64,959)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation		270,404	259,613	227,364
Amortization of intangible assets		64,819	63,195	53,258
Impairments of long-lived assets and equity method investments		1,982,580	55,581	969,258
Deferred income taxes		(349,944)	102,718	50,704
Equity income	[1]	(17,579)	(233,833)	(163,279)
Other expense (income), net		16,043	(17,278)	(5,716)
Loss on extinguishment of debt		41,025	24,864	0
Non-cash long-term compensation expense		14,921	12,301	2,786
Changes in other assets and liabilities:
Accounts receivable		64,172	(37,810)	17,523
Accounts payable		(2,709)	(7,922)	(90,301)
Deferred revenue		423,666	225,746	0
Other assets and other liabilities		27,318	55,667	(20,151)
Net cash provided by operating activities		1,168,768	1,140,886	976,487
Cash flows from investing activities:
Capital expenditures		(290,521)	(462,031)	(967,369)
Capital contributions to the MVP Joint Venture		(287,665)	(272,801)	(774,593)
Bolt-on Acquisition (defined in Note 3), net of cash acquired		0	0	(837,231)
Principal payments received on the Preferred Interest (defined in Note 1)		5,217	5,003	4,661
Net cash used in investing activities		(572,969)	(729,829)	(2,574,532)
Cash flows from financing activities:
Proceeds from revolving credit facility borrowings		467,500	1,965,000	2,484,000
Payments on revolving credit facility borrowings		(750,000)	(2,080,000)	(2,495,500)
Proceeds from the issuance of long-term debt		1,900,000	1,600,000	1,400,000
Debt discounts, debt issuance costs and credit facility origination fees		(29,904)	(26,720)	(2,870)
Payments for retirement of long-term debt		(1,936,250)	(594,000)	(34,325)
Redemption of EQM Series A Preferred Units (defined in Note 1)		0	(617,338)	0
Distributions paid to noncontrolling interests		(2,500)	(128,770)	(382,360)
Dividends paid to common shareholders		(259,495)	(278,395)	(448,128)
Cash Shares and Cash Amount (defined in Note 6)		0	(52,323)	0
Purchases of EQGP common units		0	0	(238,455)
Net cash (used in) provided by financing activities		(669,161)	(291,356)	1,392,195
Net change in cash and cash equivalents		(73,362)	119,701	(205,850)
Cash and cash equivalents at beginning of year		208,023	88,322	294,172
Cash and cash equivalents at end of year		134,661	208,023	88,322
Cash paid during the period for:
Interest, net of amount capitalized		343,351	249,302	257,065
Income taxes		3,500	3,709	0
Non-cash activity during the period for:
Contract liability		0	121,483	0
Separation-related adjustments		0	0	93,666
Series A Preferred Stock
Cash flows from financing activities:
Proceeds from issuance of EQM Series A Preferred Units, net of offering costs		0	0	1,158,313
Distributions paid to holders of EQM Series A Preferred Units		0	(61,931)	(48,480)
Dividends paid to holders of Equitrans Midstream Preferred Shares		0	(61,931)	(48,480)
Preferred Stock
Cash flows from financing activities:
Distributions paid to holders of EQM Series A Preferred Units		(58,512)	(16,879)	0
Dividends paid to holders of Equitrans Midstream Preferred Shares		(58,512)	(16,879)	0
Common Stock
Non-cash activity during the period for:
Issuance of Equitrans Midstream shares		0	2,736,229	0
Convertible Preferred Stock
Non-cash activity during the period for:
Issuance of Equitrans Midstream shares		$ 0	$ 667,214	$ 0

[1] Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note 9.

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 134,661	$ 208,023
Accounts receivable (net of allowance for credit losses of $2,696 and $4,699 as of December 31, 2021 and 2020, respectively)	252,301	290,446
Other current assets	59,867	63,268
Total current assets	446,829	561,737
Property, plant and equipment	9,004,602	8,835,652
Less: accumulated depreciation	(1,217,099)	(1,007,756)
Net property, plant and equipment	7,787,503	7,827,896
Investments in unconsolidated entity	1,239,039	2,796,316
Goodwill	486,698	486,698
Net intangible assets	651,771	716,590
Other assets	308,924	336,615
Total assets	10,920,764	12,725,852
Current liabilities:
Current portion of revolving credit facility borrowings	0	302,500
Accounts payable	59,627	72,098
Capital contributions payable to the MVP Joint Venture	72,188	10,723
Accrued interest	151,909	126,191
Accrued liabilities	83,852	83,366
Total current liabilities	367,576	594,878
Revolving credit facility borrowings	505,000	485,000
Long-term debt	6,434,945	6,443,312
Contract liability	821,342	398,750
Deferred income taxes	0	345,896
Regulatory and other long-term liabilities	99,333	94,902
Total liabilities	8,228,196	8,362,738
Mezzanine equity:
Equitrans Midstream Preferred Shares, 30,018 shares issued and outstanding as of December 31, 2021 and 2020	681,842	681,842
Shareholders' equity:
Common stock, no par value, 432,522 and 432,470 shares issued and outstanding as of December 31, 2021 and 2020, respectively	3,957,756	3,941,295
Retained deficit	(2,428,171)	(728,959)
Accumulated other comprehensive loss	(2,054)	(2,229)
Total common shareholders' equity	1,527,531	3,210,107
Noncontrolling interests	483,195	471,165
Total shareholders' equity	2,010,726	3,681,272
Total liabilities, mezzanine equity and shareholders' equity	$ 10,920,764	$ 12,725,852

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Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Accounts receivable, for doubtful accounts	$ 2,696	$ 4,699
Preferred shares, issued (in shares)	30,018	30,018
Preferred stock, outstanding (in shares)	30,018	30,018
Common stock, shares issued (In shares)	432,522	432,470
Common stock, shares outstanding (in shares)	432,522	432,470

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Statements of Consolidated Shareholders' Equity and Mezzanine Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Series A Preferred Stock	EQM Merger Series A Preferred Stock	Common Stock	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Noncontrolling Interests	Noncontrolling Interests Series A Preferred Stock	Noncontrolling Interests EQM Merger Series A Preferred Stock
Beginning balance (in shares) at Dec. 31, 2018					254,271
Beginning balance at Dec. 31, 2018	$ 5,259,633				$ 425,370	$ 33,932		$ (1,509)	$ 4,801,840
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	(64,959)					(203,743)			138,784
Pension and other post-retirement benefits liability adjustment, net of tax expense	(201)					316		(517)
Dividends on common shares	(448,567)					(448,567)
Share-based compensation plans, net (in shares)					474
Share-based compensation plans, net	2,786				$ 2,531				255
Separation-related adjustments	(93,666)				(93,666)
Distributions paid to noncontrolling interest unitholders	(382,360)								(382,360)
Distributions paid to holders of EQM Series A Preferred Units			$ (48,480)							$ (48,480)
Issuance of EQM Series A Preferred Units, net of offering costs			1,158,313							1,158,313
Bolt-on Acquisition (as defined in Note 3)	478,460								478,460
Purchase of EQGP common units	(238,455)				(38,648)				(199,807)
Net changes in ownership of consolidated entities	(340,424)				997,217				(1,337,641)
Ending balance at Dec. 31, 2019	$ 5,282,080	$ (3,718)			$ 1,292,804	(618,062)	$ (3,718)	(2,026)	4,609,364
Ending balance (in shares) at Dec. 31, 2019					254,745
Increase (Decrease) in Partners' Capital [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13 [Member]
Beginning balacne at Dec. 31, 2018	$ 0
Ending balance at Dec. 31, 2019	0
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	638,044
Net (loss) income	606,537					391,625			214,912
Pension and other post-retirement benefits liability adjustment, net of tax expense	(203)							(203)
Dividends on common shares (in shares)					(178)
Dividends on common shares	(280,559)					(280,559)
Share-based compensation plans, net (in shares)					66
Share-based compensation plans, net	13,071				$ 12,786				285
Distributions paid to noncontrolling interest unitholders	(128,770)								(128,770)
Distributions paid to holders of EQM Series A Preferred Units			(51,002)	$ (10,929)						(51,002)	$ (10,929)
Net changes in ownership of consolidated entities	257,200				2,700,000				(3,000,000)
Redemption of EQM Series A Preferred Units			$ (617,338)			(27,253)				$ (590,085)
Restructuring Agreement (as defined in Note 1)	(679,681)				$ (100,524)				(579,157)
EQM Merger (in shares)					203,137
EQM Merger	(257,224)				$ 2,736,229				(2,993,453)
Stock Purchase Agreement (as defined in Note 6) (in shares)					(25,300)
Share Purchase Agreements (as defined in Note 6)	(190,992)					(190,992)
Ending balance at Dec. 31, 2020	$ 3,681,272				$ 3,941,295	(728,959)		(2,229)	471,165
Ending balance (in shares) at Dec. 31, 2020	432,470				432,470
Mezzanine Equity
Net (loss) income	$ 31,507
Dividends paid to holders of Equitrans Midstream Preferred Shares ($0.5623 per share)	(16,879)
Restructuring Agreement (as defined in Note 1)	667,214
Ending balance at Dec. 31, 2020	681,842
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	(1,365,948)
Net (loss) income	(1,424,460)					(1,438,990)			14,530
Pension and other post-retirement benefits liability adjustment, net of tax expense	175							175
Dividends on common shares	(260,222)					(260,222)
Share-based compensation plans, net (in shares)					52
Share-based compensation plans, net	16,461				$ 16,461
Distributions paid to noncontrolling interest unitholders	(2,500)								(2,500)
Ending balance at Dec. 31, 2021	$ 2,010,726				$ 3,957,756	$ (2,428,171)		$ (2,054)	$ 483,195
Ending balance (in shares) at Dec. 31, 2021	432,522				432,522
Mezzanine Equity
Net (loss) income	$ 58,512
Dividends paid to holders of Equitrans Midstream Preferred Shares ($0.5623 per share)	(58,512)
Ending balance at Dec. 31, 2021	$ 681,842

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Statements of Consolidated Shareholders' Equity and Mezzanine Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension and other post-retirement benefits liability adjustment, tax expense	$ 62	$ 70	$ 70
Dividends on common stock (in dollars per share)	$ 0.60	$ 0.90	$ 1.76
Dividends paid to preferred shares (in dollars per share)	$ 1.9492	0.5623
EQM
Cash distributions declared per unit (in dollars per share)		2.0728	1.9703
EQM | Series A Preferred Stock
Cash distributions declared per unit (in dollars per share)		$ 1.5475	$ 4.595

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Summary of Operations and Significant Accounting Policies

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Summary of Operations and Significant Accounting Policies

Summary of Operations and Significant Accounting Policies

Organization

On November 12, 2018, Equitrans Midstream Corporation (together with its consolidated subsidiaries as applicable, the Company or Equitrans Midstream), EQT Corporation (EQT) and, for certain limited purposes, EQT Production Company, a wholly owned subsidiary of EQT, entered into a separation and distribution agreement (the Separation and Distribution Agreement), pursuant to which, among other things, EQT effected the separation of its midstream business, which was composed of the assets and liabilities of the separately-operated natural gas gathering, transmission and storage and water services operations of EQT (the Midstream Business), from EQT's upstream business, which was composed of the natural gas, oil and natural gas liquids development, production and sales and commercial operations of EQT (the Separation), and distributed 80.1% of the then-outstanding shares of common stock, no par value, of Equitrans Midstream (Equitrans Midstream common stock) to EQT shareholders of record as of the close of business on November 1, 2018 (the Distribution). As part of the Separation, EQT retained the remaining 19.9% of the then-outstanding shares in Equitrans Midstream.

Immediately following the Separation, the Company held investments in the entities then-conducting the Midstream Business, including limited and general partner interests in EQGP Holdings, LP (EQGP), which, as of the date of Separation, owned limited partner interests, the entire general partner interest and all of the incentive distribution rights (IDRs) in EQM Midstream Partners, LP (EQM). Following the closing of the EQGP Buyout (as defined and discussed in Note 2), EQGP became an indirect, wholly owned subsidiary of the Company on January 10, 2019.

The Company owns, operates, acquires and develops midstream assets in the Appalachian Basin. As of December 31, 2021, EQGP Services, LLC was EQM's general partner (the EQM General Partner) and was an indirect, wholly owned subsidiary of Equitrans Midstream.

EQM Merger. On June 17, 2020, pursuant to that certain Agreement and Plan of Merger, dated as of February 26, 2020 (the EQM Merger Agreement), by and among the Company, EQM LP Corporation, a wholly owned subsidiary of the Company (EQM LP), LS Merger Sub, LLC, a wholly owned subsidiary of EQM LP (Merger Sub), EQM and the EQM General Partner, Merger Sub merged with and into EQM (the EQM Merger), with EQM continuing and surviving as an indirect, wholly owned subsidiary of the Company. Upon consummation of the EQM Merger, the Company acquired all of the outstanding EQM common units that the Company and its subsidiaries did not already own. Following the closing of the EQM Merger, EQM was no longer a publicly traded entity. See Note 2 for further information on the EQM Merger.

Preferred Restructuring Agreement. On February 26, 2020, Equitrans Midstream and EQM entered into a Preferred Restructuring Agreement (the Restructuring Agreement) with all of the holders of the Series A Perpetual Convertible Preferred Units representing limited partner interests in EQM (such units, EQM Series A Preferred Units and, such investors, collectively, the Investors), pursuant to which, at the effective time of the EQM Merger (the Effective Time): (i) EQM redeemed $600 million aggregate principal amount of the Investors' EQM Series A Preferred Units issued and outstanding immediately prior to the Restructuring Closing (as defined below), which occurred substantially concurrent with the closing of the EQM Merger, for cash at 101% of the EQM Series A Preferred Unit purchase price of $48.77 per such unit (the EQM Series A Preferred Unit Purchase Price) plus any accrued and unpaid distribution amounts and partial period distribution amounts, and (ii) immediately following such redemption, each remaining issued and outstanding EQM Series A Preferred Unit was exchanged for 2.44 shares of a newly authorized and created series of preferred stock, without par value, of Equitrans Midstream, convertible into Equitrans Midstream common stock (the Equitrans Midstream Preferred Shares) on a one for one basis, in each case, in connection with the occurrence of the “Series A Change of Control” (as defined in the Fourth Amended and Restated Agreement of Limited Partnership of EQM (as amended, the Former EQM Partnership Agreement)) that occurred upon the closing of the EQM Merger (collectively, the Restructuring and, the closing of the Restructuring, the Restructuring Closing). See Note 2 for further information on the Restructuring Agreement.

Nature of Business

The Company provides midstream services to its customers in Pennsylvania, West Virginia and Ohio through its three primary assets: the gathering system, which includes predominantly dry gas gathering systems of high-pressure gathering lines; the transmission system, which includes FERC-regulated interstate pipelines and storage systems; and the water network, which primarily consists of water pipelines and other facilities that support well completion activities and produced water handling activities.

As of December 31, 2021, the gathering system, inclusive of Eureka Midstream's gathering system, included approximately 1,170 miles of high-pressure gathering lines with total contracted firm reservation capacity of approximately 7.0 billion cubic feet (Bcf) per day, which included contracted firm reservation capacity of approximately 1.8 Bcf per day associated with EQM's high-pressure header pipelines, 133 compressor units with compression of approximately 491,000 horsepower and multiple interconnect points with the Company's transmission and storage system and to other interstate pipelines.

As of December 31, 2021, the transmission and storage system included approximately 950 miles of FERC-regulated, interstate pipelines that have interconnect points to seven interstate pipelines and multiple local distribution companies (LDCs). The transmission and storage system is supported by 43 compressor units, with total throughput capacity of approximately 4.4 Bcf per day and compression of approximately 136,000 horsepower, and 18 associated natural gas storage reservoirs, which have a peak withdrawal capacity of approximately 850 million cubic feet (MMcf) per day and a working gas capacity of approximately 43 Bcf, in each case as of December 31, 2021.

As of December 31, 2021, the Company's fresh water systems included approximately 200 miles of pipelines that deliver fresh and produced water from local municipalities' water authorities, the Monongahela River, the Ohio River, local reservoirs and several regional waterways. The fresh water delivery services systems consist of permanent, buried pipelines, surface pipelines, 23 fresh water impoundment facilities, as well as pumping stations, which support water transportation throughout the systems, and take point facilities and measurement facilities, which support well completion activities. As of December 31, 2021, the Company's mixed water system, which the Company began to construct in 2021, included approximately eight miles of buried pipeline.

Significant Accounting Policies

Principles of Consolidation. The consolidated financial statements include the accounts of all entities in which the Company holds a controlling financial interest. For consolidated subsidiaries in which the Company’s ownership is less than 100%, the Company records noncontrolling interest related to the third-party ownership interests in those entities. Investments over which the Company can exert significant influence, but not control, over operating and financial policies are recorded under the equity method of accounting. Intercompany transactions have been eliminated for purposes of preparing these consolidated financial statements. References in these financial statements to Equitrans Midstream or the Company refer collectively to Equitrans Midstream Corporation and, as applicable, its consolidated subsidiaries for all periods presented, unless otherwise indicated.

Segments. Operating segments are revenue-producing components of the enterprise for which separate financial information is produced internally and is subject to evaluation by the Company's chief operating decision maker in deciding how to allocate resources. The Company reports its operations in three segments that reflect its three lines of business of Gathering, Transmission and Water. The operating segments are evaluated based on their contribution to the Company's operating income and equity income. Transmission also includes the Company's investment in the MVP Joint Venture, which is accounted for as an equity investment as described in Note 9; as a result, Transmission's portion of the MVP Joint Venture's operating results is reflected in equity income and not in Transmission's operating income. All of the Company's operating revenues, income and assets are generated or located in the United States. See Note 5 for financial information by segment.

Reclassification: Certain previously reported amounts have been reclassified to conform to current year presentation.

Use of Estimates. The preparation of financial statements in conformity with U.S. Generally Accepted Accounting Principles (GAAP) requires management to make estimates and assumptions that affect amounts reported in these financial statements. Actual results could differ from those estimates.

Cash Equivalents. The Company classifies highly-liquid investments with original maturities of three months or less as cash equivalents. Interest earned on cash equivalents is recorded as a reduction to net interest expense on the statements of consolidated comprehensive income.

Accounts Receivables. Trade and other receivables are stated at their historical carrying amount. Judgment is required to assess the ultimate realization of accounts receivable, including assessing the probability of collection and the creditworthiness of customers. The Company evaluates the allowance for credit losses on a quarterly basis in order to estimate uncollectible receivables.

Derivative Instruments. Derivative instruments are recorded on the Company’s consolidated balance sheets as either an asset or liability measured at fair value. See Note 12.

Fair Value of Financial Instruments. Fair value represents the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the reporting date. The Company’s assets and liabilities that are measured at fair value at each reporting date are classified according to a hierarchy that prioritizes inputs and assumptions

underlying the valuation techniques. This fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs and consists of three broad levels:

•Level 1: Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets as of the reporting date.

•Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data. These are inputs other than quoted prices in active markets included in Level 1 that are either directly or indirectly observable as of the reporting date.

•Level 3: Unobservable inputs that are not corroborated by market data and may be used with internally developed methodologies that result in management’s best estimate of fair value.

The Company prioritizes valuation techniques that maximize the use of observable inputs. Assets and liabilities are classified in their entirety based on the lowest priority level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the placement of assets and liabilities within the levels of the fair value hierarchy. Reclassifications of fair value between Level 1, Level 2 and Level 3 of the fair value hierarchy, if applicable, are made at the end of each reporting period. See Note 12 for information regarding the fair value of financial instruments.

Property, Plant and Equipment. The Company's property, plant and equipment are stated at depreciated cost. Maintenance projects that do not increase the overall life of the related assets are expensed as incurred. Expenditures that extend the useful life of the asset are capitalized. The Company capitalized internal labor costs of $50.8 million, $44.9 million and $47.6 million in the years ended December 31, 2021, 2020 and 2019, respectively. The Company capitalized interest, including the debt component of Allowance for Funds Used During Construction (AFUDC), of $4.9 million, $18.6 million and $29.5 million in the years ended December 31, 2021, 2020 and 2019, respectively.

The following table summarizes the Company's property, plant and equipment.

	December 31,
	2021		2020
	(Thousands)
Gathering assets	$	6,911,268	$	6,691,954
Accumulated depreciation	(727,735)		(543,568)
Net gathering assets	6,183,533		6,148,386
Transmission and storage assets	1,901,756		1,877,753
Accumulated depreciation	(424,918)		(370,764)
Net transmission and storage assets	1,476,838		1,506,989
Water services assets	176,245		251,885
Accumulated depreciation	(60,379)		(90,841)
Net water services assets	115,866		161,044
Net other property, plant and equipment	11,266		11,477
Net property, plant and equipment	$	7,787,503	$	7,827,896

Net other property, plant and equipment includes capitalized qualified implementation costs incurred in a hosting arrangement that is a service contract of $10.0 million and $8.8 million, respectively, as of December 31, 2021 and 2020. The Company finalized the implementation of certain portions of its enterprise resource planning system throughout 2021 and 2020 and amortized approximately $0.9 million and $0.5 million of implementation costs in the years ended December 31, 2021 and 2020, respectively.

Depreciation is recorded using composite rates on a straight-line basis over the estimated useful life of the asset. The average depreciation rates for the years ended December 31, 2021, 2020 and 2019 were 2.6%, 2.5% and 2.7%, respectively. The Company estimates that gathering and transmission pipelines have useful lives of 20 years to 50 years and compression equipment has useful lives of 20 years to 50 years. The Company estimates that water pipelines, pumping stations and impoundment facilities have useful lives of 10 years to 15 years. As circumstances warrant, depreciation estimates are reviewed to determine if any changes in the underlying assumptions are necessary. Equitrans, L.P., the Company's FERC-regulated

subsidiary, re-evaluates depreciation rates for its regulated property, plant and equipment each time it files with the FERC for a change in transmission, storage and gathering rates.

Intangible Assets. Intangible assets are recorded under the acquisition method of accounting at their estimated fair values at the acquisition date, which are calculated as the present value of estimated future cash flows using a risk-adjusted discount rate. The Company's intangible assets are amortized on a straight-line basis. The estimated annual amortization expense related to the intangible assets for each of the next five years is $64.8 million. See Note 3 for further detail.

The following tables summarize the Company's intangible assets as of December 31, 2021 and 2020:

		December 31, 2021
(In thousands)	Useful Life	Gross		Accumulated Amortization(a)		Net
Customer relationships	15 years	$	623,199	$	(171,726)	$	451,473
Eureka Midstream-related customer relationships	10.75 years	237,000		(48,144)		188,856
Hornet Midstream-related customer relationships	7.25 years	74,000		(62,558)		11,442
		$	934,199	$	(282,428)	$	651,771

		December 31, 2020
(In thousands)	Useful Life	Gross		Accumulated Amortization(a)		Net
Customer relationships	15 years	$	623,199	$	(130,180)	$	493,019
Eureka Midstream-related customer relationships	10.75 years	237,000		(27,160)		209,840
Hornet Midstream-related customer relationships	7.25 years	74,000		(60,269)		13,731
		$	934,199	$	(217,609)	$	716,590

(a)Impairment charge of $54.1 million is included within the Hornet Midstream-related customer relationships accumulated amortization. See Note 4 for further information.

Goodwill and Impairment of Long-Lived Assets. Goodwill is evaluated for impairment at least annually or whenever events or changes in circumstance indicate it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The Company may perform either a qualitative assessment of potential impairment or proceed directly to a quantitative assessment of potential impairment. The Company's qualitative assessment of potential impairment may result in the determination that a quantitative impairment analysis is not necessary. Under this elective process, the Company assesses qualitative factors to determine whether the existence of events or circumstances leads the Company to determine that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then a quantitative assessment is not required. However, if the Company concludes otherwise, a quantitative impairment analysis is performed.

If the Company chooses not to perform a qualitative assessment, or if it chooses to perform a qualitative assessment but is unable to qualitatively conclude that no impairment has occurred, then the Company will perform a quantitative assessment. In the case of a quantitative assessment, the Company estimates the fair value of the reporting unit with which the goodwill is associated and compares it to the carrying value. If the estimated fair value of a reporting unit is less than its carrying value, an impairment charge is recognized for the excess of the reporting unit's carrying value over its fair value. See Note 4 for further detail.

The Company evaluates long-lived assets for impairment when events or changes in circumstances indicate, in management's judgment, that the carrying value of such assets may not be recoverable. With respect to property, plant and equipment and finite lived intangibles, asset recoverability is measured by comparing the carrying value of the asset or asset group with its expected future pre-tax undiscounted cash flows. These cash flow estimates require the Company to make projections and assumptions for many years into the future for pricing, demand, competition, operating costs and other factors. If the carrying amount exceeds the expected future undiscounted cash flows, the Company recognizes an impairment equal to the excess of carrying value over fair value as determined by quoted market prices in active markets or present value techniques if quotes are unavailable. The determination of the fair value using present value techniques requires the Company to make projections and assumptions regarding the probability of a range of outcomes and the rates of interest used in the present value calculations. Any changes the Company makes to these projections and assumptions could result in significant revisions to its evaluations of recoverability and the recognition of additional impairments. See Note 4 for further discussion on impairments of long-lived assets.

Investments in Unconsolidated Entities. The Company accounts for the investments in its unconsolidated entities under the equity method. The Company’s pro-rata share of net income in the unconsolidated entities is included in equity income in the Company’s statements of consolidated comprehensive income. Contributions to or distributions from the unconsolidated entities and the Company’s pro-rata share of net income in the unconsolidated entities are recorded as adjustments to the investment balance. The Company reviews the carrying value of its investments in unconsolidated entities for impairment whenever events or changes in circumstances indicate that the fair value may have declined in value. When there is evidence of loss in value that is other-than-temporary, the Company compares the investment's carrying value to its estimated fair value to determine whether impairment has occurred. If the carrying value exceeds the estimated fair value, the Company estimates and recognizes an impairment loss equal to the difference between the investment's carrying value and fair value. See Notes 4 and 9 for further detail.

Preferred Interest. EQT Energy Supply, LLC (EES), a subsidiary of EQT, generates revenue by providing services to a local distribution company. The preferred interest that the Company has in EES (the Preferred Interest) is accounted for as a note receivable and is presented in other assets in the consolidated balance sheets with the current portion reported in other current assets. Distributions received from EES are recorded as a reduction to the Preferred Interest and as interest income, which is included in net interest expense in the Company's statements of consolidated comprehensive income. The EES operating agreement provides for mandatory redemption of the Preferred Interest at the end of the preference period, which is expected to be December 31, 2034.

Unamortized Debt Discount and Issuance Costs. The Company amortizes debt discounts and issuance costs over the term of the related borrowing. Costs incurred from the issuance and/or extension, as applicable, of revolving credit facilities, including borrowings under the Amended EQM Credit Facility and the 2021 Eureka Credit Facility (each as defined in Note 11), are presented in other assets in the consolidated balance sheets. Debt discounts and issuance costs for all other debt instruments are presented as a reduction to debt on the consolidated balance sheets. See Note 11 for further detail.

Leases. Right-of-use assets represent the right to use the underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. Right-of-use assets and lease liabilities are recognized on the consolidated balance sheets at the lease commencement date based on the present value of lease payments over the lease term. The Company determines if an arrangement is a lease at inception based on whether the Company has the right to control the use of an identified asset, the right to obtain substantially all of the economic benefits from the use of the asset and the right to direct the use of the asset during the lease term and accounts for leases in accordance with ASC 842, Leases (ASC 842).

Leases in which the Company is the lessee that do not have a readily determinable implicit rate utilize an incremental borrowing rate, based on the information available at the lease commencement date, to determine the present value of lease payments. When a secured borrowing rate is not readily available, unsecured borrowing rates are adjusted for the effects of collateral to determine the incremental borrowing rate. The Company reassesses the incremental borrowing rate for any new and modified lease contracts as of the contract effective date. Lease expense is recognized on a straight-line basis over the lease term for operating leases. See Note 7.

Other Current Liabilities. The following table summarizes the Company's accrued liabilities as of December 31, 2021 and 2020.

	December 31,
	2021		2020
	(Thousands)
Accrued employee compensation	$	50,372	$	46,108
Non-income tax accruals	19,972		19,492
Current portion of operating lease liabilities	8,253		9,990
Other accrued liabilities	5,255		7,776
Total accrued liabilities	$	83,852	$	83,366

Asset Retirement Obligations (AROs). The Company has AROs related to its water system impoundments and to one of its gathering compressor stations, for which the Company recorded an associated liability and capitalized a corresponding amount to asset retirement costs. The liability relates to the expected future obligation to dismantle, reclaim and dispose of these assets and was estimated using the present value of expected future cash flows, adjusted for inflation and discounted at the Company's credit-adjusted, risk-free rate. The AROs are recorded in regulatory and other long-term liabilities on the consolidated balance sheets. Throughout 2021 and 2020, the Company undertook the reclamation process for certain water system impoundments, which reclamation process was completed as of December 31, 2021.

The following table presents changes in the Company's AROs during 2021 and 2020.

	December 31,
	2021		2020
	(Thousands)
AROs at beginning of period	$	12,172	$	12,301
Liabilities settled	(1,609)		(724)
Revisions to estimated liabilities (a)	—		—
Accretion expense	678		595
AROs at end of period	$	11,241	$	12,172

(a)Revisions to estimated liabilities reflect changes in retirement cost assumptions and to the estimated timing of liability settlement.

The Company is not legally or contractually obligated to restore or dismantle its transmission and storage systems and its gathering systems, other than the one aforementioned gathering compressor station. The Company is legally required to operate and maintain these assets and intends to do so as long as supply and demand for natural gas exists, which the Company expects to continue into the foreseeable future. Therefore, the Company did not have any AROs related to its transmission and storage and gathering (other than the aforementioned gathering compressor station) assets as of December 31, 2021 and 2020.

Contingencies. The Company is involved in various regulatory and legal proceedings that arise in the ordinary course of business. A liability is recorded when the loss is probable and the amount of loss can be reasonably estimated. The Company considers many factors when making such assessments, including historical knowledge and matter specifics. Estimates are developed through consultation with legal counsel and analysis of the potential results. See Note 16.

Regulatory Accounting. Equitrans, L.P. owns all of the Company's FERC-regulated transmission and storage operations as well as its FERC-regulated low-pressure gathering assets. Therefore, Equitrans, L.P. is subject to FERC regulation. Through the rate-setting process, rate regulation allows Equitrans, L.P. to recover the costs of providing regulated services plus an allowed return on invested capital. Regulatory accounting allows Equitrans, L.P. to defer expenses and income to its consolidated balance sheets as regulatory assets and liabilities when it is probable that those expenses and income will be allowed in the rate-setting process for a period other than the period that they would be reflected in a non-regulated entity's statements of consolidated comprehensive income. Regulatory assets and liabilities are recognized in the Company's statements of consolidated comprehensive income in the period that the underlying expenses and income are reflected in the rates charged to shippers and operators. Equitrans, L.P. expects to continue to be subject to rate regulation that will provide for the recovery of deferred costs.

The following table summarizes Equitrans, L.P.'s regulatory assets and liabilities that are included in other assets and regulatory and other long-term liabilities, respectively, in the Company's consolidated balance sheets.

	December 31,
	2021		2020
	(Thousands)
Regulatory assets:
Deferred taxes (a)	$	91,989	$	89,243
Other recoverable costs (b)	3,654		4,960
Total regulatory assets	$	95,643	$	94,203
Regulatory liabilities:
Deferred taxes (a)	$	9,727	$	10,125
On-going post-retirement benefits other than pension and other reimbursable costs (c)	10,094		10,959
Total regulatory liabilities	$	19,821	$	21,084

(a)The regulatory asset from deferred taxes is primarily related to a historical deferred income tax position and taxes on the equity component of AFUDC. The regulatory liability from deferred taxes relates to the revaluation of a historical difference between the regulatory and tax bases of regulated property, plant and equipment. Equitrans, L.P. expects to recover the amortization of the deferred tax positions ratably over the depreciable lives of the underlying assets. Equitrans, L.P. also expects to recover the taxes on the equity component of AFUDC through future rates over the depreciable lives of the underlying long-lived assets.

(b)The regulatory asset from other recoverable costs is primarily related to the costs associated with the Company's legacy post-retirement benefits plan.

(c)Equitrans, L.P. defers expenses for on-going post-retirement benefits other than pensions, which are subject to recovery in approved rates. The regulatory liability reflects lower cumulative actuarial expenses than the amounts recovered through rates.

The following tables present Equitrans, L.P.'s regulated operating revenues and operating expenses and property, plant and equipment included in the Company's statements of consolidated comprehensive income and consolidated balance sheets, respectively.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Operating revenues	$	403,634	$	397,319	$	396,847
Operating expenses	135,888		124,206		210,861

	December 31,
	2021		2020
	(Thousands)
Property, plant and equipment	$	1,901,924	$	1,878,312
Accumulated depreciation	(424,918)		(370,815)
Net property, plant and equipment	$	1,477,006	$	1,507,497

Gas imbalances occur when the actual amount of gas delivered from a pipeline system or storage facility varies from the amount of gas scheduled for delivery. The Company values gas imbalances due to/from shippers and operators at current index prices. Gas imbalances are settled in-kind, subject to the terms of the applicable FERC tariffs. As of December 31, 2021 and 2020, gas imbalance receivables were $1.9 million and $1.8 million, respectively, and are presented in other current assets, with offsetting amounts recorded to system gas, a component of property, plant and equipment, on the consolidated balance sheets. The Company classifies gas imbalances as current because they are expected to settle within one year.

Revenue Recognition. Revenue is measured based on considerations specific in a contract with a customer. The Company recognizes revenue under gathering, transmission and storage and water services contracts when it satisfies certain performance obligations, as discussed below.

The Company provides gathering, transmission and storage services in two manners: firm service and interruptible service. Firm service is provided under firm contracts, which are contracts for gathering, transmission or storage services that generally obligate the customer to pay a fixed, monthly charge to reserve an agreed upon amount of pipeline or storage capacity regardless of the capacity used by the customer during each month. Volumetric-based fees can also be charged under firm contracts for each firm volume transported, gathered or stored, as well as for volumes transported, gathered or stored in excess of the firm contracted volume, if capacity exists. Interruptible service contracts include volumetric-based fees, which are charges for the volume of gas gathered, transported or stored and generally do not guarantee access to the pipeline or storage facility. Firm and interruptible contracts can be short- or long-term in duration. Firm and interruptible transmission and storage service contracts are billed at the end of each calendar month, with payment typically due within 10 days. Firm and interruptible gathering contracts are billed on a one-month lag, with payment typically due within 21 days. Revenue related to gathering services provided but not yet billed is estimated each month. These estimates are generally based on contract data, preliminary throughput and allocation measurements.

Under a firm contract, the Company has a stand-ready obligation to provide the service over the life of the contract. The performance obligation for firm reservation fee revenue is satisfied over time as the pipeline capacity is made available to the customer. As such, the Company recognizes firm reservation fee revenue evenly over the contract period using a time-elapsed output method to measure progress. The performance obligation for volumetric-based fee revenue is generally satisfied upon the Company's monthly billing to the customer for volumes gathered, transported or stored during the month. The amount billed generally corresponds directly to the value of the Company's performance to date as the customer obtains value as each volume is gathered, transported or stored.

Water service revenues represent fees charged by the Company for the delivery of fresh and produced water to a customer at a specified delivery point and for the collection and recycling or disposal of flowback and produced water. The Company's water service revenues are generated under firm service and interruptible service contracts, which primarily utilize fixed prices per

volume delivered. Firm service provides water services under firm contracts to customers with priority. Interruptible service contracts generally do not guarantee access to the water facilities. For fresh and produced water delivery service contracts, the only performance obligation in each contract is for the Company to provide water (usually a minimum daily volume of water) to the customer at a designated delivery point. For flowback and produced water, the performance obligation is collection and disposal of the water, which typically occur within the same day. Water service contracts are billed on a monthly basis, with payment typically due within 30 days.

For all contracts, the Company allocates the transaction price to each performance obligation based on the estimated relative standalone selling price. When applicable, the excess of consideration received over revenue recognized results in the deferral of those amounts until future periods based on a units of production or straight-line methodology as these methods appropriately match the consumption of services provided to the customer. The units of production methodology requires the use of production estimates that are uncertain and the use of judgment when developing estimates of future production volumes, thus impacting the rate of revenue recognition. Production estimates are monitored as circumstances and events warrant.

Certain of the Company's gas gathering and water services agreements, including the EQT Global GGA, are structured with MVCs, which specify minimum quantities for which a customer will be charged regardless of quantities gathered or delivered under the contract. Revenue is recognized for MVCs when the performance obligation has been met, which is the earlier of when the gas is gathered or water provided, or when it is remote that the producer will be able to meet its MVC. If a customer under such an agreement fails to meet its MVC for a specified period (thus not exercising all the contractual rights to gathering and water services within the specified period, herein referred to as “breakage”), it is obligated to pay a contractually determined fee based upon the shortfall between the actual volumes and the MVC for the period contained in the contract. See Note 6.

AFUDC. The Company capitalizes the carrying costs of financing the construction of certain long-lived, regulated assets. Such costs are amortized over the asset's estimated useful life and include interest costs (the debt component of AFUDC) and equity costs (the equity component of AFUDC). The debt component of AFUDC is recorded as a reduction to net interest expense on the statements of consolidated comprehensive income, and the equity component of AFUDC is recorded in other (expense) income, net, on the statements of consolidated comprehensive income. The debt component of AFUDC for the years ended December 31, 2021, 2020 and 2019 was $0.2 million, $0.3 million and $1.4 million, respectively, and the equity component of AFUDC for the years ended December 31, 2021, 2020 and 2019 was $0.3 million, $0.8 million and $5.7 million, respectively.

Share-Based Compensation. The Company recognizes share-based compensation expense based upon the estimated fair value of awards over the requisite service period. Time-based restricted units expected to be satisfied in cash are accounted for as liability awards recorded over the requisite service period, typically three years. The fair value of liability awards is remeasured at the end of each reporting period based on the closing price of the Company’s common stock. Time-based restricted stock awards expected to be satisfied in Company common stock are accounted for as equity awards and are recorded over the requisite service period, typically three years, based on the grant date fair value. Director phantom units expected to be satisfied in Company common stock vest on the date of grant and are recorded based on the grant date fair value. The grant date fair value, in both cases, is determined based upon the closing price of the Company's common stock on the day before the grant date. Forfeitures are accounted for as they occur.

For plans that include a performance condition that affects the number of awards that will ultimately vest, the probability that the performance condition will be achieved is reevaluated at the end of each reporting period and the payout multiplier is applied to the grant date fair value or measurement date fair value to record compensation expense, as applicable. For plans that include a market condition, compensation expense is based on a grant date fair value using a Monte Carlo simulation that remains constant throughout the vesting period for equity plans and a fair value based on a Monte Carlo simulation remeasured at each reporting period for liability plans. Each plan subject to a market condition is accounted for separately for each vesting tranche of the award. See Note 10.

Income Taxes. The Company files a consolidated income tax return for federal income taxes and the provision for income taxes is determined using the asset and liability approach of accounting for income taxes. Under this approach, the provision for income taxes represents income taxes paid or payable (or received or receivable) plus the change in deferred taxes for the current year. EQM is a limited partnership for U.S. federal and state income tax purposes. Eureka Midstream is a limited liability company for such purposes. EQM and Eureka Midstream are not subject to U.S. federal or state income taxes.

All of Eureka Midstream's income is, and for the period prior to the closing of the EQM Merger all of EQM's income was, included in the Company's pre-tax income; however, the Company does not record income tax expense on the portions of its income attributable to the noncontrolling member of Eureka Midstream and did not record income tax expense on the portions of its income attributable to the noncontrolling limited partners of EQM for the periods prior to the closing of the EQM Merger. This reduces the Company's effective tax rate in periods when the Company has consolidated pre-tax income and increases the effective tax rate in periods when the Company has consolidated pre-tax loss.

Deferred taxes represent the future tax consequences of differences between the financial and tax bases of the Company's assets and liabilities. Deferred tax balances are adjusted for changes in tax rates and tax laws when enacted. Deferred tax assets are reflected on the consolidated balance sheets for net operating losses, credits or other attributes generated by the Company. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not (greater than 50%) that a tax benefit will not be realized. In evaluating the need for a valuation allowance, management considers all potential sources of taxable income, including income available in carry-back periods, future reversals of taxable temporary differences, projections of taxable income and income from tax planning strategies, as well as all available positive and negative evidence.

Deferred tax assets for which no valuation allowance is recorded may not be realized and changes in facts and circumstances may result in the establishment of a valuation allowance. Existing valuation allowances are re-examined under the same standards of positive and negative evidence that apply to valuation allowance establishment. If it is determined that it is more likely than not that a deferred tax asset for which a valuation is recorded will be realized, all or a portion of the valuation allowance may be released. Deferred tax assets and liabilities are also re-measured to reflect changes in underlying tax rates from tax law changes.

Tax benefits related to uncertain tax positions taken or expected to be taken on a tax return are recorded when such benefits meet a more likely than not threshold; otherwise, the tax benefit is recorded when the tax position has been effectively settled, either because the statute of limitations has expired or the appropriate taxing authority has completed its examination. Interest and penalties related to uncertain tax positions are recognized as part of the provision for income taxes and are accrued in the period that such interest and penalties would be applicable under relevant tax law until such time that the related tax benefits are recognized. See Note 14.

Noncontrolling Interests. Noncontrolling interests represent the portion of the equity of consolidated entities that are not wholly owned by the Company. Noncontrolling interests are reported as a component of shareholders’ equity in the consolidated balance sheets and are adjusted by the amount of net income earned by the entities with noncontrolling interests, distributions paid to noncontrolling interest holders and any changes in the noncontrolling ownership percentages. As of December 31, 2021 and 2020, the Company's noncontrolling interest consisted of the third-party ownership interest in Eureka Midstream.

For the period prior to the closing of the EQM Merger and for the year ended December 31, 2019, the Company's noncontrolling interests included the EQM common units not held by the Company or its affiliates. For the years ended December 31, 2021 and 2020, and for the period from April 10, 2019 to December 31, 2019, the Company's noncontrolling interests also included third-party ownership interests in Eureka Midstream. For the period from January 1, 2020 through the closing of the EQM Merger and the period April 10, 2019 through December 31, 2019, the Company’s noncontrolling interests also included the EQM Series A Preferred Unitholders' interest in EQM's net income. For the period beginning January 1, 2019 and ending January 10, 2019, the Company's noncontrolling interests included third-party ownership interests in EQGP.

Earnings Per Share (EPS). Basic EPS is computed by dividing net (loss) income attributable to Equitrans Midstream common shareholders by the weighted average number of shares of Equitrans Midstream common stock outstanding during the period. Diluted EPS is computed by dividing net (loss) income attributable to Equitrans Midstream by the weighted average number of shares of Equitrans Midstream common stock outstanding and the assumed issuance of all potentially dilutive securities. Each issue of potential common shares is evaluated separately in sequence from the most dilutive to the least dilutive. The dilutive effect of share-based payment awards and stock options is calculated using the treasury stock method, which assumes share purchases are calculated using the average share price of Equitrans Midstream common stock during the applicable period. The Company uses the if-converted method to compute potential common shares from potentially dilutive convertible securities. Under the if-converted method, dilutive convertible securities are assumed to be converted from the date of the issuance and the resulting common shares are included in the denominator of the diluted EPS calculation for the period being presented. Income attributable to preferred dividends on convertible preferred stock that accumulated during the period is added back to the numerator for purposes of the if-converted method. Diluted EPS also takes into consideration the potential dilution from securities issued by subsidiaries that enable their holders to obtain the subsidiary's common stock. See Note 13.

Recently Issued Accounting Standards

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848), which provides practical expedients for contract modifications and certain hedging relationships associated with the transition from reference rates that are expected to be discontinued. This guidance is applicable for the Amended EQM Credit Facility and the 2021 Eureka Credit Facility (each as defined in Note 11), as well as for each dividend following March 31, 2024 for the Equitrans Midstream Preferred Shares, which each use the London Inter-Bank Offered Rate (LIBOR) as a reference rate. The ASU was effective immediately but is only available through December 31, 2022. The Company is currently evaluating the potential impact of this standard on its financial statements.

In August 2020, the FASB issued ASU 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the accounting for convertible debt and convertible preferred stock by removing the requirements to separately present certain conversion features in equity. In addition, the amendments in the ASU 2020-06 also simplify the guidance in ASC Subtopic 815-40, Derivatives and Hedging: Contracts in Entity’s Own Equity, by removing certain criteria that must be satisfied in order to classify a contract as equity. Finally, the amendments revise the guidance on calculating earnings per share, requiring use of the if-converted method for all convertible instruments and rescinding an entity’s ability to rebut the presumption of share settlement for instruments that may be settled in cash or other assets. The amendments are effective for fiscal years beginning after December 15, 2021. Adoption of the guidance must commence at the beginning of the annual fiscal year. The Company adopted this standard on January 1, 2022 and it had no impact on the Company's financial statements.

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Investments in Consolidated, Non-Wholly-Owned Entities

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Investments in Consolidated, Non-Wholly-Owned Entities

Investments in Consolidated, Non-Wholly Owned Entities

EQM IDR Transaction. On February 22, 2019, the Company completed a simplification transaction pursuant to that certain Agreement and Plan of Merger, dated as of February 13, 2019, by and among the Company and certain related parties, pursuant to which, among other things, (i) Equitrans Merger Sub, LP merged with and into EQGP (the IDR Merger) with EQGP continuing as the surviving limited partnership and a wholly owned subsidiary of EQM, and (ii) each of (a) the IDRs in EQM, (b) the economic portion of the general partner interest in EQM and (c) the issued and outstanding common units representing limited partner interests in EQGP (EQGP common units) were canceled, and, as consideration for such cancellation, certain wholly owned subsidiaries of the Company received on a pro rata basis 80,000,000 newly-issued EQM common units and 7,000,000 newly-issued Class B units representing limited partner interests in EQM (Class B units), and the EQM General Partner retained the non-economic general partner interest in EQM (such transactions, collectively, the EQM IDR Transaction). Additionally, as part of the EQM IDR Transaction, 21,811,643 EQM common units held by EQGP were canceled and 21,811,643 EQM common units were issued pro rata to certain wholly owned subsidiaries of the Company. As a result of the EQM IDR Transaction, the EQM General Partner replaced EQM Midstream Services, LLC as the general partner of EQM.

After giving effect to the EQM IDR Transaction, including the issuance of Class B units, the Company indirectly owned a total of 117,245,455 EQM common units and all of the Class B units.

EQM Series A Preferred Units. On March 13, 2019, EQM entered into a Convertible Preferred Unit Purchase Agreement, together with Joinder Agreements entered into on March 18, 2019, with the Investors to issue and sell in a private placement (the Private Placement) an aggregate of 24,605,291 EQM Series A Preferred Units for a cash purchase price of $48.77 per EQM Series A Preferred Unit, resulting in total gross proceeds of approximately $1.2 billion. The net proceeds from the Private Placement were used in part to fund the purchase price in the Bolt-on Acquisition and to pay certain fees and expenses related to the Bolt-on Acquisition, and the remainder was used for general partnership purposes. The Private Placement closed concurrently with the closing of the Bolt-on Acquisition on April 10, 2019, as discussed further in Note 3. See below for a discussion on the Preferred Restructuring Agreement.

EQM Merger. As discussed in Note 1, on June 17, 2020, the Company, EQM, EQM LP, Merger Sub and the EQM General Partner completed the EQM Merger, pursuant to which Merger Sub merged with and into EQM, with EQM continuing and surviving as an indirect, wholly owned subsidiary of the Company. As a result of the EQM Merger, EQM is no longer a publicly traded entity.

At the Effective Time, subject to applicable tax withholding, (i) each outstanding EQM common unit, other than EQM common units owned by the Company and its subsidiaries, was converted into the right to receive 2.44 shares of Equitrans Midstream common stock (the Merger Consideration); (ii) (x) $600.0 million aggregate principal amount of the EQM Series A Preferred Units issued and outstanding immediately prior to the Effective Time were redeemed by EQM for cash at 101% of the EQM Series A Preferred Unit Purchase Price plus any accrued and unpaid distribution amounts and partial period distribution amounts, and (y) immediately following such redemption, each remaining issued and outstanding EQM Series A Preferred Unit was exchanged for 2.44 Equitrans Midstream Preferred Shares; and (iii) each outstanding phantom unit relating to an EQM common unit issued pursuant to the Amended and Restated EQGP Services, LLC 2012 Long-Term Incentive Plan, dated as of February 22, 2019 (the EQM LTIP), and any other award issued pursuant to the EQM LTIP, whether vested or unvested, was converted into the right to receive, with respect to each EQM common unit subject thereto, the Merger Consideration (plus any accrued but unpaid amounts in relation to distribution equivalent rights). The limited partner interests in EQM owned by the Company and its subsidiaries (including the Class B units) remained outstanding as limited partner interests in the surviving entity. The EQM General Partner continued to own the non-economic general partner interest in the surviving entity.

No fractional shares of Equitrans Midstream common stock were issued in the EQM Merger; instead, all fractions of Equitrans Midstream common stock to which an EQM common unitholder otherwise would have been entitled were aggregated and the resulting fraction was rounded up to the nearest whole share of Equitrans Midstream common stock.

In connection with the EQM Merger at the Effective Time, the Company's omnibus and secondment agreements with EQM and certain other subsidiaries of the Company terminated, subject to the survival of certain license rights and indemnification obligations.

Because the Company controlled EQM both before and after the EQM Merger, the increase in the Company’s ownership interest in EQM resulting from the EQM Merger was accounted for as an equity transaction and reflected as a reduction of the noncontrolling interest associated with public ownership of EQM common units, offset by an increase in common stock, no par value. No gain or loss was recognized in the Company’s statements of consolidated comprehensive income as a result of the EQM Merger. In addition, the tax effects of the EQM Merger were reported as adjustments to deferred income taxes and Equitrans Midstream common stock, consistent with ASC 740, Income Taxes.

Immediately prior to the completion of the EQM Merger, the public limited partners collectively owned a 40.1% interest in EQM, excluding the impact of the EQM Series A Preferred Units. The publicly-owned EQM common units, prior to completion of the EQM Merger, were reflected within noncontrolling interest in the Company's consolidated balance sheets as of March 31, 2020. The portion of EQM earnings attributable to publicly-held EQM common units prior to completion of the EQM Merger was reflected in net income attributable to noncontrolling interests in the Company's statements of consolidated comprehensive income.

Additionally, for the period from January 1, 2020 to June 17, 2020, the Company determined that EQM was a variable interest entity. Through the Company's ownership and control of the general partner of EQM during that period, the Company had the power to direct the activities that most significantly affected EQM's economic performance. As a result of the EQM Merger, EQM is no longer a variable interest entity.

The Company recorded $23.8 million in expenses related to the EQM Merger and the EQT Global GGA (as defined in Note 4) during the year ended December 31, 2020. The expenses consisted of advisor, legal and accounting fees related to the transactions and are included in separation and other transaction costs in the statements of consolidated comprehensive income.

Preferred Restructuring Agreement. As discussed in Note 1, on June 17, 2020, concurrently with the closing of the EQM Merger: (i) EQM redeemed $600 million aggregate principal amount of the EQM Series A Preferred Units issued and outstanding immediately prior to the Effective Time for cash at 101% of the EQM Series A Preferred Unit Purchase Price plus any accrued and unpaid distribution amounts and partial period distribution amounts, and (ii) immediately following such redemption, each remaining issued and outstanding EQM Series A Preferred Unit was exchanged for 2.44 Equitrans Midstream Preferred Shares, in each case, in connection with the occurrence of the “Series A Change of Control” (as defined in the Former EQM Partnership Agreement) that occurred upon the closing of the EQM Merger. The Equitrans Midstream Preferred Shares issued were not registered under the Securities Act of 1933, as amended (the Securities Act), in reliance upon the exemption provided in Section 4(a)(2) of the Securities Act and/or Regulation D promulgated thereunder.

On June 17, 2020, the Company paid cash of $617.3 million to redeem $600 million aggregate principal amount of the Investors’ EQM Series A Preferred Units and pay partial period distributions on such EQM Series A Preferred Units. At the time of the redemption, the carrying value of the EQM Series A Preferred Units was $590.1 million, resulting in a premium over the carrying value of $27.3 million. The premium represented a return similar to distributions to the holders of the EQM Series A Preferred Units and, as such, reduced net income attributable to Equitrans Midstream common shareholders, and was recorded in retained earnings (deficit) in the statements of consolidated shareholders' equity and mezzanine equity.

Pursuant to the Restructuring Agreement, in connection with the Restructuring Closing, the Company filed a statement with respect to shares, attaching a Certificate of Designations (the Certificate of Designations), with the Pennsylvania Department of State on June 17, 2020 to, among other things, authorize and establish the designations, rights and preferences of the Equitrans Midstream Preferred Shares. On August 13, 2020, pursuant to the terms of the Certificate of Designations, the Company paid $10.9 million in the aggregate to holders of Equitrans Midstream Preferred Shares related to forgone partial period distributions on the EQM Series A Preferred Units that were converted into Equitrans Midstream Preferred Shares in connection with the EQM Merger.

The Company's Second Amended and Restated Articles of Incorporation (the Restated Articles) set forth the designations, rights and preferences of the Equitrans Midstream Preferred Shares.

The Equitrans Midstream Preferred Shares were a new class of security as of June 2020. They rank pari passu with any other outstanding class or series of preferred stock of the Company and senior to Equitrans Midstream common stock with respect to dividend rights and rights upon liquidation. The Equitrans Midstream Preferred Shares vote on an as-converted basis with Equitrans Midstream common stock and have certain other class voting rights with respect to any amendment to the Restated Articles that would be adverse (other than in a de minimis manner) to any of the rights, preferences or privileges of the Equitrans Midstream Preferred Shares.

The holders of the Equitrans Midstream Preferred Shares receive cumulative quarterly dividends at a rate per annum of 9.75% for each quarter ending on or before March 31, 2024, and thereafter quarterly dividends at a rate per annum equal to the sum of (i) three-month LIBOR as of the LIBOR Determination Date (as defined in the Restated Articles) in respect of the applicable quarter and (ii) 8.15%; provided that such rate per annum in respect of periods after March 31, 2024 will not be less than 10.50%. The Company is not permitted to pay any dividends on any junior securities, including on Equitrans Midstream common stock, prior to paying the quarterly dividends payable to the Equitrans Midstream Preferred Shares, including any previously accrued and unpaid dividends.

Each holder of the Equitrans Midstream Preferred Shares may elect to convert all or any portion of the Equitrans Midstream Preferred Shares owned by it into Equitrans Midstream common stock initially on a one-for-one basis, subject to certain anti-dilution adjustments and an adjustment for any dividends that have accrued but not been paid when due and partial period dividends (referred to as the conversion rate), at any time (but not more often than once per fiscal quarter), provided that any conversion involves an aggregate number of Equitrans Midstream Preferred Shares of at least $20.0 million (calculated based on the closing price of Equitrans Midstream common stock on the trading day preceding notice of the conversion) or such lesser amount if such conversion relates to all of a holder’s remaining Equitrans Midstream Preferred Shares or if such conversion is approved by the Company's Board of Directors (Board).

So long as the holders of the Equitrans Midstream Preferred Shares have not elected to convert all of their Equitrans Midstream Preferred Shares into Equitrans Midstream common stock, the Company may elect to convert all of the Equitrans Midstream Preferred Shares into Equitrans Midstream common stock, at the then-applicable conversion rate, if (i) the shares of Equitrans Midstream common stock are listed for, or admitted to, trading on a national securities exchange, (ii) the closing price per share of Equitrans Midstream common stock on the national securities exchange on which the shares of Equitrans Midstream common stock are listed for, or admitted to, trading exceeds $27.99 for the 20 consecutive trading days immediately preceding notice of the conversion, (iii) the average daily trading volume of the Equitrans Midstream common stock on the national securities exchange on which the shares of Equitrans Midstream common stock are listed for, or admitted to, trading exceeds 1,000,000 shares (subject to certain adjustments) of Equitrans Midstream common stock for the 20 consecutive trading days immediately preceding notice of the conversion, (iv) the Company has an effective registration statement on file with the SEC covering resales of the shares of Equitrans Midstream common stock to be received by such holders upon any such conversion and (v) the Company has paid all prior accumulated and unpaid dividends in cash in full to the holders.

Upon certain events involving a Change of Control (as defined in the Restated Articles) in which more than 90% of the consideration payable to the Company, or to the holders of Equitrans Midstream common stock, is payable in cash, the Equitrans Midstream Preferred Shares will automatically convert into Equitrans Midstream common stock at a conversion ratio equal to the greater of (i) the quotient of (a) the sum of (x) $19.99 (such price, the Equitrans Midstream Preferred Share Issue Price) plus (y) any accrued and unpaid dividends as of such date, including any partial period dividends, with respect to the Equitrans Midstream Preferred Shares, divided by (b) the Equitrans Midstream Preferred Share Issue Price and (ii) the quotient of (a) the sum of (x)(1) the Equitrans Midstream Preferred Share Issue Price multiplied by (2) 110% plus (y) any accrued and unpaid dividends on such date, including any partial period dividends with respect to the Equitrans Midstream Preferred Shares, divided by (b) the volume weighted average price of the shares of Equitrans Midstream common stock for the 30-day period ending immediately prior to the execution of definitive documentation relating to the Change of Control.

In connection with other Change of Control events that do not satisfy the 90% cash consideration threshold described above, in addition to certain other conditions, each holder of Equitrans Midstream Preferred Shares may elect to (i) convert all, but not less than all, of its Equitrans Midstream Preferred Shares into Equitrans Midstream common stock at the then-applicable conversion rate, (ii) if the Company is not the surviving entity (or if the Company is the surviving entity, but Equitrans Midstream common stock will cease to be listed), require the Company to use commercially reasonable efforts to cause the surviving entity in any such transaction to deliver, in exchange for such holder's Equitrans Midstream Preferred Shares, a substantially equivalent security that has rights, preferences and privileges substantially equivalent to the Equitrans Midstream Preferred Shares (or if the Company is unable to cause such substantially equivalent securities to be issued, to exercise the option described in clause (i) or (iv) hereof or elect to convert such Equitrans Midstream Preferred Shares at a conversion ratio reflecting a multiple of invested capital), (iii) if the Company is the surviving entity, continue to hold the Equitrans Midstream Preferred Shares or (iv) require the Company to redeem the Equitrans Midstream Preferred Shares at a price per share equal to 101% of the Equitrans Midstream Preferred Share Issue Price, plus accrued and unpaid dividends, including any partial period dividends, on the applicable Equitrans Midstream Preferred Shares as of such date, which redemption price may be payable in cash, Equitrans Midstream common stock or a combination thereof at the election of the Board (and, if payable in Equitrans Midstream common stock, such Equitrans Midstream common stock will be issued at 95% of the volume-weighted average price of Equitrans Midstream common stock for the 20-day period ending on the fifth trading day immediately preceding the consummation of the Change of Control). Any holder of Equitrans Midstream Preferred Shares that requires the Company to

redeem its Equitrans Midstream Preferred Shares pursuant to clause (iv) above will have the right to withdraw such election with respect to all, but not less than all, of its Equitrans Midstream Preferred Shares at any time prior to the fifth trading day immediately preceding the consummation of the Change of Control and instead elect to be treated in accordance with any of clauses (i), (ii) or (iii) above.

At any time on or after January 1, 2024, the Company will have the right, subject to applicable law, to redeem the Equitrans Midstream Preferred Shares, in whole or in part, by paying cash for each Equitrans Midstream Preferred Share to be redeemed in an amount equal to the greater of (a) the sum of (i)(1) the Equitrans Midstream Preferred Share Issue Price multiplied by (2) 110%, plus (ii) any accrued and unpaid dividends, including partial period dividends, with respect to the Equitrans Midstream Preferred Shares as of such date and (b) the amount the holder of such Equitrans Midstream Preferred Share would receive if such holder had converted such Equitrans Midstream Preferred Share into shares of Equitrans Midstream common stock at the then-applicable conversion ratio and the Company liquidated immediately thereafter.

Pursuant to the terms of the Restructuring Agreement, in connection with the Restructuring Closing, the Company entered into a registration rights agreement with the Investors (the Registration Rights Agreement) pursuant to which, among other things, the Company gave the Investors certain rights to require the Company to file and maintain one or more registration statements with respect to the resale of the Equitrans Midstream Preferred Shares and the shares of Equitrans Midstream common stock that are issuable upon conversion of the Equitrans Midstream Preferred Shares, and certain Investors have the right to require the Company to initiate underwritten offerings for the Equitrans Midstream Preferred Shares and the shares of Equitrans Midstream common stock that are issuable upon conversion of the Equitrans Midstream Preferred Shares.

During the year ended December 31, 2020, as a result of the Restructuring Closing, the Company recorded an increase in mezzanine equity of $667.2 million, a decrease in noncontrolling interest of $579.2 million and a decrease in common stock, no par value, of $100.5 million, net of deferred taxes of $12.5 million.

The Equitrans Midstream Preferred Shares are considered redeemable securities under GAAP due to the possibility of redemption outside the Company’s control. They are therefore presented as temporary equity in the mezzanine equity section of the Company’s consolidated balance sheets and are not considered to be a component of shareholders’ equity on the consolidated balance sheets. The Equitrans Midstream Preferred Shares were recorded at fair value as of the date of issuance, and income allocations increase the carrying value and declared dividends decrease the carrying value of the Equitrans Midstream Preferred Shares. As the Equitrans Midstream Preferred Shares are not currently redeemable and not probable of becoming redeemable, adjustment to the initial carrying amount is not necessary and would only be required if it becomes probable that the Equitrans Midstream Preferred Shares would become redeemable.

Investment in EQGP

EQGP Unit Purchases. On November 29, 2018, the Company entered into written agreements (the Unit Purchase Agreements) with certain investors owning an aggregate of 15,364,421 EQGP common units for $20.00 per EQGP common unit (the Purchase Price).

On December 31, 2018, the Company closed on the acquisition of an aggregate 14,560,281 EQGP common units pursuant to the Unit Purchase Agreements (the Initial Unit Purchase Closing) for an aggregate purchase price of $291.2 million. The Initial Unit Purchase Closing resulted in a reduction of additional paid-in capital of $46.8 million and a decrease in noncontrolling interest in consolidated subsidiaries of $244.4 million for the year ended December 31, 2018.

On January 2, 2019 and January 3, 2019, the Company closed on the acquisition of the remaining 804,140 EQGP common units that the Company did not purchase on December 31, 2018, pursuant to the Unit Purchase Agreements for an aggregate purchase price of $16.1 million (together with the Initial Unit Purchase Closing on December 31, 2018, the EQGP Unit Purchases).

EQGP Limited Call Right. Following the Initial Unit Purchase Closing, on December 31, 2018, the Company exercised a limited call right (the Limited Call Right and, together with the EQGP Unit Purchases, the EQGP Buyout) provided for in EQGP's agreement of limited partnership, dated as of October 12, 2018, pursuant to which the Company purchased all outstanding EQGP common units (other than those owned by the Company and its affiliates) at the Purchase Price. On January 10, 2019, the Company completed its exercise of the Limited Call Right by closing on the acquisition on the remaining 11,097,287 outstanding EQGP common units not owned by the Company or its affiliates for an aggregate purchase price of $221.9 million, and EQGP became an indirect, wholly owned subsidiary of the Company.

In connection with the completion of the EQGP Buyout on January 10, 2019, certain non-employee members of the Board of Directors of EQGP's general partner stepped down from their roles and were paid the Purchase Price for each EQGP phantom unit that they held, which was, in the aggregate, 29,829 EQGP phantom units, including accrued distributions.

In addition, on January 10, 2019, EQGP's omnibus agreement with Equitrans Midstream was terminated.

Net Changes in Ownership of EQM

As a result of equity transactions relating to the Company's investment in EQM, the Company adjusted its noncontrolling interest and common stock, no par value, balances to reflect the resulting changes in ownership. During the year ended December 31, 2020, as a result of the EQM Merger, the Company recorded, in the aggregate, a $2.7 billion increase of common stock, no par value, a decrease in noncontrolling interest of $3.0 billion and an increase in deferred tax liability of $257.2 million. During the year ended December 31, 2019, as a result of the EQM IDR Transaction, the Company recorded, in the aggregate, a $997.2 million increase of common stock, no par value, a decrease in noncontrolling interest of $1.3 billion and a decrease in deferred tax asset of $340.4 million.

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Mergers and Acquisitions

12 Months Ended

Dec. 31, 2021

Business Combination and Asset Acquisition [Abstract]

Mergers and Acquisitions

Mergers and Acquisitions

EQM Merger. See Note 2.

Bolt-on Acquisition. On March 13, 2019, the Company entered into a Purchase and Sale Agreement with North Haven Infrastructure Partners II Buffalo Holdings, LLC (NHIP), an affiliate of Morgan Stanley Infrastructure Partners, pursuant to which the Company acquired from NHIP a 60% Class A interest in Eureka Midstream and a 100% interest in Hornet Midstream (collectively, the Bolt-on Acquisition) for total consideration of approximately $1.04 billion, composed of approximately $852 million in cash, net of purchase price adjustments, and approximately $192 million in assumed pro-rata debt. At the time of the acquisition, Eureka Midstream owned an approximately 190-mile gathering header pipeline system in Ohio and West Virginia that services both dry Utica and wet Marcellus Shale production and Hornet Midstream owned an approximately 15-mile, high-pressure gathering system in West Virginia that connects to the Eureka Midstream system. The Bolt-on Acquisition closed on April 10, 2019 and was funded through proceeds from the Private Placement of the EQM Series A Preferred Units that closed concurrently with the Bolt-on Acquisition. See Note 2 for further information regarding the Private Placement.

At the closing of the Bolt-on Acquisition, a subsidiary of Hornet Midstream terminated all of its obligations under its term loan credit agreement and repaid the $28.2 million outstanding principal balance and $0.1 million in related interest and fees.

The Company recorded $17.0 million in acquisition-related expenses related to the Bolt-on Acquisition during the year ended December 31, 2019. The Bolt-on Acquisition acquisition-related expenses included $15.3 million for professional fees and $1.7 million for compensation arrangements during the year ended December 31, 2019, and are included in separation and other transaction costs in the statements of consolidated comprehensive income.

The Bolt-on Acquisition was accounted for as a business combination using the acquisition method. As a result of the acquisition, the Company recognized $99.2 million of goodwill, which was allocated to the Gathering segment. Such goodwill primarily related to additional commercial opportunities, a diversified producer customer mix, increased exposure to dry Utica and wet Marcellus acreage and operating leverage within the Gathering segment. The purchase price allocation and related adjustments were finalized during the fourth quarter of 2019. The following table summarizes the final purchase price and allocation of the fair value of the assets acquired and liabilities assumed in the Bolt-on Acquisition as of April 10, 2019 by the Company, as well as certain measurement period adjustments made subsequent to the Company's initial valuation.

(in thousands)	Preliminary Purchase Price Allocation (As initially reported)		Measurement Period Adjustments (a)		Purchase Price Allocation (As adjusted)
Consideration given:
Cash consideration (b)	$	861,250	$	(11,404)	$	849,846
Buyout of portion of Eureka Midstream Class B units and incentive compensation	2,530		—		2,530
Total consideration	863,780		(11,404)		852,376
Fair value of liabilities assumed:
Current liabilities	52,458		(9,857)		42,601
Long-term debt	300,825		—		300,825
Other long-term liabilities	10,203		—		10,203
Amount attributable to liabilities assumed	363,486		(9,857)		353,629
Fair value of assets acquired:
Cash	15,145		—		15,145
Accounts receivable	16,817		—		16,817
Inventory	12,991		(26)		12,965
Other current assets	882		—		882
Net property, plant and equipment	1,222,284		(8,906)		1,213,378
Intangible assets (c)	317,000		(6,000)		311,000
Deferred tax asset	5,773		(5,268)		505
Other assets	14,567		—		14,567
Amount attributable to assets acquired	1,605,459		(20,200)		1,585,259
Noncontrolling interests	(486,062)		7,602		(478,460)
Goodwill as of April 10, 2019	$	107,869	$	(8,663)	$	99,206
Impairment of goodwill (d)					(99,206)
Goodwill as of December 31, 2019					$	—

(a)    The Company recorded measurement period adjustments to its preliminary acquisition date fair values due to the refinement of its valuation models, assumptions and inputs. The measurement period adjustments were based upon information obtained about facts and circumstances that existed at the acquisition date that, if known, would have affected the measurement of the amounts recognized at that date.

(b)     The cash consideration for the Bolt-on Acquisition was adjusted by approximately $11.4 million related to working capital adjustments and the release of all escrowed indemnification funds to the Company.

(c)    After considering the refinements to the valuation models, the Company estimated the fair value of the customer-related intangible assets acquired as part of the Bolt-on Acquisition to be $311.0 million. As a result, the fair value of the customer-related intangible assets was decreased by $6.0 million on September 30, 2019 with a corresponding increase to goodwill. In addition, the change to the provisional amount resulted in a decrease in amortization expense and accumulated amortization of approximately $0.4 million.

(d)    During the third quarter of 2019, the Company identified impairment indicators that suggested the fair value of its goodwill was more likely than not below its carrying amount. As such, the Company performed an interim goodwill impairment assessment, which resulted in the Company recognizing impairment to goodwill of approximately $268.1 million, of which $99.2 million was associated with its Eureka/Hornet reporting unit, bringing the reporting unit's goodwill balance to zero. See Note 4 for further detail.

The estimated fair value of midstream facilities and equipment, generally consisting of pipeline systems and compression stations, was estimated using the cost approach. Significant unobservable inputs in the estimate of fair value under this approach included management's assumptions about the replacement costs for similar assets, the relative age of the acquired assets and any potential economic or functional obsolescence associated with the acquired assets. As a result, the estimated fair value of the midstream facilities and equipment represented a Level 3 fair value measurement.

As a result of the acquisition, the noncontrolling interest in Eureka Midstream was estimated to be $478.5 million. The fair value of the noncontrolling interest was calculated based on the enterprise value of Eureka Midstream and the percentage ownership not acquired by the Company. Significant unobservable inputs in the enterprise value of Eureka Midstream include

future revenue estimates and future cost assumptions. As a result, the fair value measurement is based on significant inputs that are not observable in the market and thus represents a Level 3 fair value measurement.

As part of the preliminary purchase price allocation, the Company identified intangible assets for customer relationships with third-party customers. The fair value of the customer relationships with third-party customers was determined using the income approach, which requires a forecast of the expected future cash flows generated and an estimated market-based weighted average cost of capital. Significant unobservable inputs in the determination of fair value include future revenue estimates, future cost assumptions and estimated customer retention rates. As a result, the estimated fair value of the identified intangible assets represents a Level 3 fair value measurement. The Company previously utilized a useful life of 20 years for the Eureka Midstream- and Hornet Midstream-related intangible assets. As a result of then-expected changes in cash flows due to decreases in producer activity driven by lower natural gas prices in periods subsequent to the Bolt-on Acquisition closing, as of April 1, 2020, the Company prospectively changed the remaining useful life of the Eureka Midstream-related intangible assets to 10.75 years, increasing the expected annual amortization expense by $9.1 million. In addition, as a result of then-expected reductions in future cash flows, as of October 1, 2019, the useful life of the Hornet Midstream-related intangible assets was prospectively changed to 7.25 years.

In conjunction with the Bolt-on Acquisition, the Company recorded tax deductible goodwill of $43.0 million. The Company does not have tax basis on the portion attributable to the former noncontrolling limited partners of EQM.

Post-Acquisition Operating Results. Subsequent to the completion of the Bolt-on Acquisition, Eureka Midstream and Hornet Midstream collectively contributed the following to both the Gathering segment and the Company's consolidated operating results for the period from April 10, 2019 through December 31, 2019.

(in thousands)	April 10, 2019 Through December 31, 2019
Operating revenues	$	97,123
Operating loss attributable to Equitrans Midstream	$	(94,551)
Net loss attributable to noncontrolling interests	$	(21,291)
Net loss attributable to Equitrans Midstream	$	(80,631)

Unaudited Pro Forma Information. The following unaudited pro forma combined financial information presents the Company's results as though the EQGP Buyout, EQM IDR Transaction and Bolt-on Acquisition had been completed at January 1, 2019. The pro forma combined financial information has been included for comparative purposes and is not necessarily indicative of the results that might have actually occurred had the EQGP Buyout, EQM IDR Transaction and Bolt-on Acquisition taken place on January 1, 2019; furthermore, the financial information is not intended to be a projection of future results.

(in thousands, except per share data)	December 31, 2019
Pro forma operating revenues	$	1,661,822
Pro forma net loss	$	(44,167)
Pro forma net income attributable to noncontrolling interests	$	126,558
Pro forma net loss attributable to Equitrans Midstream	$	(170,725)
Pro forma loss per share (basic)	$	(0.67)
Pro forma loss per share (diluted)	$	(0.67)

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Impairments of Long-Lived Assets

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Impairments of Long-Lived Assets

Impairments of Long-Lived Assets

Goodwill. The three reporting units to which the Company had goodwill during 2019 were (i) the Ohio gathering assets that were acquired in certain prior acquisitions (collectively, Rice Retained Midstream), (ii) the Pennsylvania gathering assets acquired by EQM from Rice Midstream Partners LP (n/k/a RM Partners LP) (RMP) and its general partner (RMP PA Gas Gathering reporting unit) and (iii) the Ohio and West Virginia gathering assets acquired in the Bolt-on Acquisition (Eureka/Hornet, collectively with Rice Retained Midstream and RMP PA Gas Gathering, the Reporting Units).

During the third quarter of 2019, the Company identified impairment indicators in the form of significant declines in the unit price of EQM common units and corresponding market capitalization, primarily as a result of continued suppressed natural gas prices and decreased producer drilling activity. Management considered these declines as indicators that the fair value of goodwill was more likely than not below the carrying amounts for the respective Reporting Units. As such, the performance of an interim goodwill impairment assessment was required. In estimating the fair value of each of the Reporting Units, the Company used a combination of the income approach and the market approach. The Company used the income approach’s

discounted cash flow method, which applies significant inputs not observable in the public market (Level 3), including estimates and assumptions related to the use of an appropriate discount rate, future throughput volumes, operating costs, capital spending and changes in working capital. The Company used the market approach’s comparable company and reference transaction methods. The comparable company method evaluates the value of a company using metrics of other businesses of similar size and industry. The reference transaction method evaluates the value of a company based on pricing multiples derived from similar transactions entered into by similar companies.

As of August 31, 2019, the Company determined that the fair value of Rice Retained Midstream was greater than its carrying value; however, the carrying values of RMP PA Gas Gathering and Eureka/Hornet were each greater than their respective fair values. As a result, the Company recognized impairment of goodwill of $168.9 million and $99.2 million on RMP PA Gas Gathering and Eureka/Hornet, respectively. The non-cash impairment charges are included in the impairments of long-lived assets line on the Company's statements of consolidated comprehensive income.

During the fourth quarter of 2019, as of the date of the Company’s annual goodwill impairment assessment, the Company concluded the performance of a quantitative impairment assessment was required. Factors contributing to this conclusion were the continued decline of the Company's market capitalization in the fourth quarter and the sustained declines in producer drilling activity driven by market conditions including natural gas pricing.

Consistent with the third quarter 2019 interim goodwill impairment assessment, the Company used the income approach’s discounted cash flow method and the market approach’s comparable company and reference transaction methods. During the Company’s fourth quarter 2019 impairment assessment, the Company determined that the carrying values of RMP PA Gas Gathering and Rice Retained Midstream were each greater than their respective fair values. As a result, the Company recognized impairment of goodwill of $433.2 million and $150.5 million on RMP PA Gas Gathering and Rice Retained Midstream, respectively. The non-cash impairment charge is included in the impairments of long-lived assets line on the Company's statements of consolidated comprehensive income.

The following table summarizes the carrying amount of goodwill associated with the Company's Reporting Units for the years ended December 31, 2021, 2020 and 2019.

	EQM Opco(a)		Rice Retained Midstream		Eureka/Hornet		Total
	(Thousands)
Gross Goodwill	$	1,350,721	$	150,489	$	—	$	1,501,210
Accumulated impairment losses	(261,941)		—		—		(261,941)
Goodwill as of January 1, 2019	1,088,780		150,489		—		1,239,269
Add: goodwill associated with Bolt-on Acquisition	—		—		99,206		99,206
Less: impairment of goodwill	(602,082)		(150,489)		(99,206)		(851,777)
Goodwill as of December 31, 2019	486,698		—		—		486,698
Goodwill as of December 31, 2020	486,698		—		—		486,698
Goodwill as of December 31, 2021	$	486,698	$	—	$	—	$	486,698
Gross Goodwill	$	1,350,721	$	150,489	$	99,206	$	1,600,416
Accumulated impairment losses	(864,023)		(150,489)		(99,206)		(1,113,718)
Goodwill as of December 31, 2021	$	486,698	$	—	$	—	$	486,698

(a) Effective on the EQT Global GGA Effective Date, the RMP PA Gas Gathering reporting unit was merged with and into the EQM Opco reporting unit, with the EQM Opco reporting unit surviving.

On February 26, 2020 (the EQT Global GGA Effective Date), the Company (through EQM) entered into a Gas Gathering and Compression Agreement (as amended, the EQT Global GGA) with EQT for the provision of certain gas gathering services to EQT in the Marcellus and Utica Shales of Pennsylvania and West Virginia (as further discussed in Note 6). Prior to the EQT Global GGA Effective Date, the Company operated three reportable operating segments and seven reporting units, which are one level below the operating segment level and are generally based on how segment management reviews the Company's operating results. Commencing with the EQT Global GGA Effective Date, the Company reduced its reporting units from seven to six and maintained its three reportable operating segments. As of the EQT Global GGA Effective Date, the only reporting unit to which the Company had goodwill recorded was the RMP PA Gas Gathering reporting unit. As a result of the EQT Global GGA, the assets under, and operations associated with, the RMP PA Gas Gathering reporting unit and the reporting unit associated with the gas gathering and compression activities of EQM Gathering Opco, LLC, an indirect wholly owned

subsidiary of the Company (EQM Opco reporting unit), were combined to service a collective minimum volume commitment (MVC) under the agreement. Therefore, effective on the EQT Global GGA Effective Date, the RMP PA Gas Gathering reporting unit was merged with and into the EQM Opco reporting unit, with the EQM Opco reporting unit surviving.

During the first quarter of 2020, the Company identified impairment indicators in the form of significant declines in the unit price of EQM common units and corresponding market capitalization. Management considered these declines as indicators that the fair value of the RMP PA Gas Gathering reporting unit may have been below its carrying amount, and the performance of an interim quantitative goodwill impairment assessment was required. Additionally, as a result of the combination of the RMP PA Gas Gathering reporting unit and the EQM Opco reporting unit, the Company tested both the RMP PA Gas Gathering and the merged EQM Opco reporting units for goodwill impairment. In estimating the fair value of the RMP PA Gas Gathering and the merged EQM Opco reporting units, the Company used a combination of the income approach and the market approach, both as described above.

As a result of the interim assessment, the Company determined that the fair values of the RMP PA Gas Gathering reporting unit and the merged EQM Opco reporting unit, as applicable, were greater than their respective carrying values. No impairment to goodwill was recorded during the three months ended March 31, 2020. The Company believes the estimates and assumptions used in estimating its reporting units’ fair values are reasonable and appropriate; however, different assumptions and estimates could materially affect the calculated fair values of the RMP PA Gas Gathering reporting unit and the merged EQM Opco reporting unit and the resulting conclusions on impairment of goodwill, which could materially affect the Company’s results of operations and financial position. Additionally, actual results could differ from these estimates and assumptions may not be realized.

During the fourth quarter of 2020, the Company performed a quantitative impairment assessment as required as part of the annual goodwill impairment assessment. As a result of the annual assessment, the Company determined that the fair value of the EQM Opco reporting unit was greater than its carrying value. No impairment to goodwill was recorded as a result of the annual impairment assessment.

As of December 31, 2021, the Company's goodwill balance was associated entirely with the EQM Opco reporting unit. During the fourth quarter of 2021, the Company performed a quantitative impairment assessment as required as part of the annual goodwill impairment assessment. As a result of the annual assessment, the Company determined that the fair value of the EQM Opco reporting unit was greater than its carrying value. No impairment to goodwill was recorded as a result of the impairment assessment. However, the EQM Opco reporting unit is susceptible to impairment risk from future adverse market or economic conditions and Company-specific qualitative factors, contractual changes or modifications or other adverse factors such as unexpected future production curtailments by the Company's customers that have contracts with volumetric-based fees. Any such adverse changes in the future could reduce the underlying cash flows used to estimate fair value and could result in a decline in fair value that could trigger future impairment charges relating to the EQM Opco reporting unit.

Long-Lived Assets. During the third quarter of 2019, the Company assessed its long-lived asset groups for impairment due to the triggering events described in the 2019 interim goodwill impairment summary above. As a result of the recoverability test, management determined that the carrying value of certain long-lived assets associated with Eureka/Hornet (specifically, Hornet Midstream customer-related intangible assets) were not recoverable. The Company estimated the fair value of the Hornet Midstream-related intangible assets and determined that the fair value was not in excess of the assets’ carrying value, which resulted in an impairment charge of approximately $36.4 million related to certain of such intangible assets within the Company's Gathering segment. The non-cash impairment charge is included in the impairments of long-lived assets line on the statements of consolidated comprehensive income. During the fourth quarter of 2019, a triggering event occurred as a result of the Company's annual goodwill impairment evaluation, which required the Company to perform a recoverability test on its long-lived assets. No impairment to long-lived assets was recorded as a result of the recoverability test.

During 2019, the Company reassessed its asset groupings for its regulated pipelines due to certain regulatory ratemaking policy changes affecting the regulated pipelines, changes in strategic focus and plans for segmentation of operations. Prior to the second quarter of 2019, the Company defined its regulated asset grouping to include the FERC-regulated transmission and storage assets, integrated with the low-pressure assets due to overlapping operations, a shared costs structure and similar ratemaking structures. During the second quarter of 2019, Equitrans, L.P. reached a settlement related to its FERC Form 501-G report, which was focused solely on the Company’s FERC-regulated transmission and storage assets. Further, management increased its operational focus and emphasis on high-pressure gathering assets as illustrated by the consummation of the Bolt-on Acquisition. As a result of these regulatory changes and shift in operational focus, beginning with the second quarter of 2019, the Company grouped its FERC-regulated assets in two asset groupings: FERC-regulated transmission and storage assets and FERC-regulated low-pressure gathering assets. Upon the change in asset grouping, management evaluated whether any indicators of impairment were present and, in conjunction with the evaluation, the Company determined that the carrying values for the non-core FERC-regulated low-pressure gathering assets exceeded their undiscounted cash flows. Additionally,

following the settlement related to the FERC Form 501-G report, management did not, and currently does not plan to, seek to recover the deficient cash flows through a future rate proceeding. The Company therefore estimated the fair values of FERC-regulated low-pressure gathering assets and determined that their fair values were not in excess of the assets’ carrying values, which resulted in recognized impairments of property and equipment of approximately $81.0 million during 2019 related to the assets within the Company's Gathering segment. As a result of the impairment, the assets carry no book value. The non-cash impairment charge is included in the impairments of long-lived assets line on the statements of consolidated comprehensive income.

As of March 31, 2020, the Company performed a recoverability test of the Hornet Midstream long-lived assets due to decreased producer activity. As a result of the recoverability test, management determined that the carrying value of the Hornet Midstream long-lived assets (which consisted of gathering assets and customer-related intangible assets) was not recoverable under ASC 360, Impairment Testing: Long-Lived Assets Classified as Held and Used. During the first quarter of 2020, the Company estimated the fair value of the Hornet Midstream asset group and determined that the fair value was not in excess of the assets’ carrying value, which resulted in impairment charges of approximately $37.9 million to the gathering assets and approximately $17.7 million to the customer-related intangible assets both within the Company’s Gathering segment. The non-cash impairment charges were recognized during the first quarter of 2020 and are included in the impairments of long-lived assets line on the statements of consolidated comprehensive income.

As of June 30, 2021, the Company performed a recoverability test of the Equitrans Water Services (OH) LLC (Ohio Water) long-lived assets due to decreased producer activity in Ohio within the Company's Water segment. As a result of the recoverability test, management determined that the carrying value of the Ohio Water long-lived assets was not recoverable under ASC 360, Impairment Testing: Long-Lived Assets Classified as Held and Used. The Company estimated the fair value of the Ohio Water asset group and determined that the fair value was less than the assets’ carrying value, which resulted in impairment charges of approximately $56.2 million to the Ohio Water assets within the Company's Water segment. The non-cash impairment charge was recognized during the second quarter of 2021 and is included in the impairments of long-lived assets line on the statements of consolidated comprehensive income.

Equity Method Investment. The Company is also required to evaluate its equity method investment in the MVP Joint Venture to determine whether it is impaired under ASC 323, Investments - Equity Method and Joint Ventures. The standard for determining whether an impairment must be recorded under ASC 323 is whether there occurred an other-than-temporary decline in value. The Company monitors events or circumstances that may indicate the carrying value of such investment may have experienced an other-than-temporary decline in value. The fair value of an equity method investment is generally estimated using an income approach under which significant judgments and assumptions include expected future cash flows, the appropriate discount rate and probability-weighted scenarios.

Events or circumstances that may be indicative of an other-than-temporary decline in value of an equity method investment include, but are not limited to:

•a prolonged period of time that the fair value is below the investor’s carrying value;

•the current expected financial performance is significantly worse than anticipated when the investor originally invested in the investee;

•adverse regulatory action is expected to substantially reduce the investee’s product demand or profitability;

•the investee has lost significant customers or suppliers with no immediate prospects for replacement;

•the investee’s discounted or undiscounted cash flows are below the investor’s carrying amount; and

•the investee’s industry is declining and significantly lags the performance of the economy as a whole.

The estimates that the Company makes with respect to its equity method investment are based upon assumptions that management believes are reasonable, and the impact of variations in these estimates or the underlying assumptions could be material. Additionally, if any joint venture to which the investment relates recognizes an impairment under ASC 360, the Company would be required to record its proportionate share of such impairment loss and would also evaluate such investment for an other-than-temporary decline in value under ASC 323.

During 2020, the MVP Joint Venture received certain adverse court rulings in the U.S. Fourth Circuit Court of Appeals. As a result, the Company evaluated its equity method investment in the MVP Joint Venture for impairment during the fourth quarter of 2020 and determined that the fair value of the investment continued to exceed the carrying value and, therefore, no impairment was necessary. The Company estimated the fair value of its investment in the MVP Joint Venture using an income

approach that primarily considered probability-weighted scenarios of discounted future net cash flows based on the most recent estimate of total project costs and revenues as of December 31, 2020. These scenarios reflected assumptions and judgments regarding various future court decisions and regulatory authorizations and the impact that those decisions and authorizations may have on the timing and extent of the Company’s investment, including scenarios assuming the full resolution of permitting issues. The Company’s analysis took into account, among other things, growth expectations from additional compression expansion opportunities. The Company generally used an after-tax discount rate of 5.5% in the analysis derived based on a market participant approach. Based on the Company’s then expectations for the MVP Joint Venture's projects, and taking into account, among other things, regulatory considerations, public support for the MVP project by the Chairman of the U.S. Senate Committee on Energy and Natural Resources, and other publicly available information, the Company assigned higher probabilities for scenarios under which the Company received all required legal and regulatory approvals and authorizations and certain compression expansion opportunities are realized. A low probability was assigned to the scenario under which the project is cancelled.

During the fourth quarter of 2021, certain legal challenges before the Fourth Circuit regarding regulatory authorizations previously granted to the MVP Joint Venture were completed, other than the issuance of decisions in those matters. In connection with the completion of those proceedings, the Company identified as an indicator of an other-than-temporary decline in value the various uncertain legal outcomes and the potential impacts that certain unfavorable outcomes could have on the then targeted full in-service date for the MVP project and consequent timing for certain projects related thereto and total targeted MVP project costs. In January 2022, the Fourth Circuit vacated and remanded the MVP Joint Venture's authorizations related to the Jefferson National Forest (JNF) received from the Bureau of Land Management and the U.S. Forest Service and, in February 2022, the Fourth Circuit vacated and remanded the Biological Opinion and Incidental Take Statement issued by the U.S. Department of the Interior’s Fish and Wildlife Service for the MVP project. The Company considered these unfavorable decisions by the Fourth Circuit as supplemental evidence in evaluating its equity method investment in the MVP Joint Venture as of December 31, 2021, to determine if the investment’s carrying value exceeded the fair value and, if so, whether that the decline in value was other-than-temporary.

The Company estimated the fair value of its investment in the MVP Joint Venture using an income approach that primarily considered revised probability-weighted scenarios of discounted future net cash flows based on the estimates of total project costs and revenues. These scenarios reflected assumptions and judgments regarding the ultimate outcome of further matters relating to, or resulting from, the January and February 2022 Fourth Circuit rulings, as well as various other ongoing legal and regulatory matters affecting the MVP and MVP Southgate projects. Such assumptions and judgments also included certain additional potential delays and related cost increases that could result from unfavorable decisions on these proceedings and matters. The Company’s analysis also took into account, among other things, probability-weighted growth expectations from additional compression expansion opportunities. The Company generally used an after-tax discount rate of 5.5 percent in the analysis derived based on a market participant approach. The Company considered scenarios under which ongoing or new legal and regulatory matters further delay the completion and increase the total costs of the project; all required legal and regulatory approvals and authorizations and certain compression expansion opportunities are realized; and the MVP project is canceled. As a result of the assessment, the Company recognized a pre-tax impairment charge of $1.9 billion that reduced the carrying value of its equity investment in the MVP Joint Venture to approximately $1.2 billion as of December 31, 2021. Given the significant assumptions and judgments used in estimating the fair value of the Company's investment in the MVP Joint Venture, the fair value of the investment in the MVP Joint Venture represents a Level 3 measurement.

There is risk that the Company’s equity investment in the MVP Joint Venture may be further impaired in the future. There are ongoing (and may be future) legal and regulatory matters related to the MVP project, any of which could affect the ability to complete or operate the project, as well as legal and regulatory matters related to the MVP Southgate project that must be resolved in connection with the project. Assumptions and estimates utilized in assessing the fair value of the Company’s investment in the MVP Joint Venture may change depending on the nature or timing of resolutions to the legal and regulatory matters or based on other relevant developments. Adverse changes in circumstances relevant to the likelihood of project or expansion completion could prompt the Company, in future assessments, to apply a lower probability of project or expansion completion and such changes in assumptions or estimates (including probability) could have a material adverse effect on the fair value of the Company's investment in the MVP Joint Venture and potentially result in an additional impairment, which could have a material adverse effect on the Company's results of operations and financial position.

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Financial Information by Business Segment

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Financial Information by Business Segment

Financial Information by Business SegmentThe Company reports its operations in three segments that reflect its three lines of business of Gathering, Transmission and Water, which reflects the manner in which management evaluates the business for making operating decisions and assessing performance. Refer to Note 1 for discussion on business segments.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Revenues from customers:
Gathering	$	862,053	$	1,012,281	$	1,159,931
Transmission	400,202		393,836		390,520
Water	54,782		104,708		79,791
Total operating revenues	$	1,317,037	$	1,510,825	$	1,630,242
Operating income (loss):
Gathering (a)	$	414,200	$	535,976	$	(88,850)
Transmission	274,526		275,369		277,731
Water (b)	(53,980)		38,756		15,305
Headquarters (c)	(1,183)		(25,540)		(128,186)
Total operating income	$	633,563	$	824,561	$	76,000
Reconciliation of operating income to net (loss) income:
Equity income (d)	$	17,579	$	233,833	$	163,279
Impairment of equity method investment (d)	(1,926,402)		—		—
Other (expense) income, net (e)	(16,104)		17,225		2,661
Loss on extinguishment of debt	(41,025)		(24,864)		—
Net interest expense	(378,650)		(307,380)		(256,195)
Income tax (benefit) expense	(345,091)		105,331		50,704
Net (loss) income	$	(1,365,948)	$	638,044	$	(64,959)

(a)Impairments of long-lived assets of $55.6 million and $854.3 million for the years ended December 31, 2020 and 2019, respectively, were included in Gathering operating income (loss). See Note 4 for further information.

(b)Impairments of long-lived assets of $56.2 million for the year ended December 31, 2021 was included in Water operating income (loss). See Note 4 for further information.

(c)Includes separation and other transaction costs and other unallocated corporate expenses.

(d)Equity income and impairment of equity method investment are included in the Transmission segment.

(e)Includes unrealized (loss) gain on derivative instruments recorded in the Gathering segment.

	December 31,
	2021		2020		2019
	(Thousands)
Segment assets:
Gathering	$	7,638,877	$	7,739,836	$	7,572,911
Transmission (a)	2,769,097		4,357,382		3,903,707
Water	151,151		185,802		202,440
Total operating segments	10,559,125		12,283,020		11,679,058
Headquarters, including cash	361,639		442,832		362,651
Total assets	$	10,920,764	$	12,725,852	$	12,041,709

(a)The equity investment in the MVP Joint Venture is included in the Transmission segment.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Depreciation:
Gathering	$	188,633	$	172,967	$	144,310
Transmission	55,310		54,540		51,935
Water	25,233		30,880		26,915
Headquarters	1,228		1,226		4,204
Total	$	270,404	$	259,613	$	227,364
Expenditures for segment assets:
Gathering (a)	$	223,807	$	344,873	$	834,712
Transmission (b)	25,977		45,219		59,313
Water	34,877		11,905		37,457
Headquarters	1,494		4,004		9,779
Total (c)	$	286,155	$	406,001	$	941,261

(a)Includes approximately $14.1 million, $41.6 million and $25.9 million of capital expenditures related to noncontrolling interests in Eureka Midstream for the years ended December 31, 2021, 2020 and 2019, respectively.

(b)Transmission capital expenditures do not include capital contributions made to the MVP Joint Venture for the MVP and MVP Southgate projects of approximately $287.7 million, $272.8 million and $774.6 million for the years ended December 31, 2021, 2020 and 2019, respectively.

(c)The Company accrues capital expenditures when the work has been completed but the associated bills have not yet been paid. Accrued capital expenditures are excluded from the statements of consolidated cash flows until they are paid. The net impact of non-cash capital expenditures, including the effect of accrued capital expenditures, assumed capital expenditures associated with the Bolt-on Acquisition, transfers to/from inventory as assets are completed/assigned to a project and capitalized share-based compensation costs, was $4.4 million, $56.0 million and $26.1 million at December 31, 2021, 2020 and 2019, respectively.

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Revenue from Contracts with Customers

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Revenue from Contract with Customers

Revenue from Contracts with Customers

For the years ended December 31, 2021, 2020 and 2019, all revenues recognized on the Company's statements of consolidated comprehensive income are from contracts with customers. As of December 31, 2021 and 2020, all receivables recorded on the Company's consolidated balance sheets represent performance obligations that have been satisfied and for which an unconditional right to consideration exists.

Summary of disaggregated revenues. The tables below provide disaggregated revenue information by business segment.

	Year Ended December 31, 2021
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	468,156	$	366,323	$	5,063	$	839,542
Volumetric-based fee revenues	393,897		33,879		49,719		477,495
Total operating revenues	$	862,053	$	400,202	$	54,782	$	1,317,037

	Year Ended December 31, 2020
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	595,720	$	364,533	$	41,798	$	1,002,051
Volumetric-based fee revenues	416,561		29,303		62,910		508,774
Total operating revenues	$	1,012,281	$	393,836	$	104,708	$	1,510,825

	Year Ended December 31, 2019
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	581,118	$	356,569	$	11,190	$	948,877
Volumetric-based fee revenues	578,813		33,951		68,601		681,365
Total operating revenues	$	1,159,931	$	390,520	$	79,791	$	1,630,242

(a)    For the years ended December 31, 2021 and 2020, firm reservation fee revenues associated with Gathering included approximately $11.3 million and $15.0 million, respectively, of MVC unbilled revenues. There were no MVC unbilled revenues associated with Gathering during the year ended December 31, 2019.

Contract assets. The Company recognizes contract assets primarily in instances where billing occurs subsequent to revenue recognition and the Company's right to invoice the customer is conditioned on something other than the passage of time. The Company's contract assets primarily consist of revenue recognized under contracts containing MVCs (whereby management has concluded (i) it is probable there will be a MVC deficiency payment at the end of the then-current MVC period, which is typically the period beginning at the inception of such contracts through the successive twelve-month periods after that date, and (ii) that a significant reversal of revenue recognized currently for the future MVC deficiency payment will not occur), as well as certain other contractual commitments. As a result, the Company's contract assets related to the Company's future MVC deficiency payments are generally expected to be collected within the next twelve months and are primarily included in other current assets in the Company's consolidated balance sheets until such time as the MVC deficiency payments are invoiced to the customer.

The following table presents changes in the Company's unbilled revenue balance during the years ended December 31, 2021 and 2020:

	Unbilled Revenue
	2021		2020
	(Thousands)
Balance as of beginning of period	$	18,618	$	—
Revenue recognized in excess of amounts invoiced (a)	26,779		28,446
Minimum volume commitments invoiced (b)	(28,442)		(9,828)
Amortization (c)	(183)		—
Balance as of end of period	$	16,772	$	18,618

(a) Primarily includes revenues associated with MVCs that are generally included in firm reservation fee revenues within the Gathering and Water segments. During the year ended December 31, 2021, also includes other contractual commitments of approximately $6.4 million.

(b) Unbilled revenues are transferred to accounts receivable once the Company has an unconditional right to consideration from the customer.

(c) Amortization of capitalized contract costs paid to customers over the expected life of the agreement.

Contract liabilities. The Company's contract liabilities consist of deferred revenue primarily associated with the EQT Global GGA, including advance payments from EQT associated with the Rate Relief Shares (as defined below) acquired by the Company as consideration for certain commercial terms and the initial fair value of the Henry Hub cash bonus payment provision (as defined below). The contract liabilities are classified as current or non-current according to when such amounts are expected to be recognized. As of December 31, 2021, total contract liabilities were $822.4 million, of which $1.1 million was classified as current and recorded in accrued liabilities and $821.3 million was classified as non-current and recorded in contract liability on the Company's consolidated balance sheets. As of December 31, 2020, the contract liabilities were $398.8 million, which was recorded in contract liability on the Company's consolidated balance sheets.

Contracts requiring advance payments and the recognition of contract liabilities are evaluated to determine whether the advance payments provide the Company with a significant financing benefit. This determination requires significant judgment and is based on the combined effect of the expected length of time between when the Company transfers the promised goods or services to the customer and when the customer pays for those goods or services and the prevailing interest rates. The Company has assessed the EQT Global GGA and determined that this agreement does not contain a significant financing component.

The following table presents changes in the Company's contract liability balances during the years ended December 31, 2021 and 2020:

	Contract Liability
	2021		2020
	(Thousands)
Balance as of beginning of period	$	398,750	$	—
Amounts recorded during the period (a)	300,496		398,750
Change in estimated variable consideration (b)	123,707		—
Amounts transferred during the period (c)	(537)		—
Balance as of end of period	$	822,416	$	398,750

(a) Includes deferred billed revenue during the years ended December 31, 2021 and 2020 primarily associated with the EQT Global GGA.

(b) Change in estimated variable consideration represents the increase in total deferred revenue required for gathering MVC revenue with a declining rate structure, resulting from contractual amendments that required total estimated gathering consideration to be reduced. See 'EQT Global GGA' discussion below for additional information on the contractual amendments.

(c)    Deferred revenues are recognized as revenue upon satisfaction of the Company's performance obligation to the customer.

Summary of remaining performance obligations. The following table summarizes the estimated transaction price allocated to the Company's remaining performance obligations under all contracts with firm reservation fees and MVCs as of December 31, 2021 that the Company will invoice or transfer from contract liabilities and recognize in future periods.

	2022		2023		2024		2025		2026		Thereafter		Total
	(Thousands)
Gathering firm reservation fees	$	88,587	$	105,667	$	157,484	$	149,923	$	141,091	$	1,277,200	$	1,919,952
Gathering revenues supported by MVCs	441,202		454,236		426,929		445,958		457,120		3,462,805		5,688,250
Transmission firm reservation fees	362,096		358,222		375,984		362,814		357,910		3,222,117		5,039,143
Water revenues supported by MVCs	33,313		37,500		37,500		37,500		37,500		193,750		377,063
Total (a)	$	925,198	$	955,625	$	997,897	$	996,195	$	993,621	$	8,155,872	$	13,024,408

(a) Includes assumptions regarding timing for placing certain projects in-service. Such assumptions may not be realized and delays in the in-service dates for projects have substantially altered, and additional delays may further substantially alter, the remaining performance obligations for certain contracts with firm reservation fees and/or MVCs. The MVP Joint Venture is accounted for as an equity investment and those amounts are not included in the table above.

Based on total projected contractual revenues, including projected contractual revenues from future capacity expected from expansion projects that are not yet fully constructed for which the Company has executed firm contracts, the Company's firm gathering contracts and firm transmission and storage contracts had weighted average remaining terms of approximately 14 years and 13 years, respectively, as of December 31, 2021.

EQT Global GGA. On the EQT Global GGA Effective Date, the Company entered into the EQT Global GGA with EQT for the provision by the Company of certain gas gathering services to EQT in the Marcellus and Utica Shales of Pennsylvania and West Virginia. Pursuant to the EQT Global GGA, EQT is subject to an initial annual MVC of 3.0 Bcf per day that gradually steps up to 4.0 Bcf per day through December 2031 following the full in-service date of the MVP. The EQT Global GGA runs from the EQT Global GGA Effective Date through December 31, 2035, and will renew annually thereafter unless terminated by EQT or the Company pursuant to its terms. Pursuant to the EQT Global GGA, the Company has certain obligations to build connections to connect EQT wells to the Company's gathering system, which are subject to geographical limitations in relation to the dedicated area in Pennsylvania and West Virginia, as well as the distance of such connections to the Company's then-existing gathering system. Management has estimated the total consideration expected to be received over the life of the EQT Global GGA, including gathering MVC revenue with a declining rate structure, the gathering fee credit for certain gathered volumes that also receive separate transmission services under certain transmission contracts (including the FTS (defined below)), the fair value of the Rate Relief Shares (as defined below) and the initial fair value of the Henry Hub cash bonus payment provision. From time to time, and at a minimum, at each reporting date, management reviews and updates, as necessary, the assumptions utilized to estimate the total consideration of the EQT Global GGA. The total consideration is allocated proportionally to the performance obligation under the contract, which is to provide daily MVC capacity over the life of the contract, in order to recognize revenue in accordance with ASC 606, Revenue from Contracts with Customers. The performance obligations will be satisfied during the life of the contract based on a units of production methodology for the daily MVC capacity provided to EQT. Due to the declining rate structure, there will be periods during which the billable gathering MVC revenue will exceed the allocated consideration to the performance obligation, which will result in billable gathering

MVC revenue being deferred to the contract liability. The deferred consideration amounts are deferred until recognized in revenue when the associated performance obligation has been satisfied and are classified as current or non-current according to when such amounts are expected to be recognized. In addition to the estimated total consideration allocated to the daily MVC, the EQT Global GGA includes other fees based on variable or volumetric-based services that will be recognized in the period the services are provided. The Company applied judgment in determining the balance sheet classification of the elements of the EQT Global GGA and Share Purchase Agreements (as defined below) under the applicable accounting guidance.

The gathering MVC fees payable by EQT to the Company set forth in the EQT Global GGA are subject to potential reductions for certain contract years as set forth in the EQT Global GGA, conditioned to begin the first day of the quarter in which the full in-service date of the MVP occurs, which provide for estimated aggregate fee relief of approximately $270 million in the first twelve-month period, approximately $230 million in the second twelve-month period and approximately $35 million in the third twelve-month period. Further, the EQT Global GGA provides for a fee credit to the gathering rate for certain gathered volumes that also receive separate transmission services under certain transmission contracts. In addition, given that the MVP full in-service date did not occur by January 1, 2022, EQT has an option until December 31, 2022, to forgo approximately $145 million of the gathering fee relief in such first twelve-month period and approximately $90 million of the gathering fee relief in such second twelve-month period in exchange for a cash payment from the Company to EQT in the amount of approximately $196 million (the EQT Cash Option). As consideration for the additional rate relief subject to the EQT Cash Option, the Company purchased shares of its common stock (see Rate Relief Shares discussed and defined below) from EQT. The consideration received for future contractual rate relief associated with the Rate Relief Shares was recorded at a fair value of approximately $121.5 million as a contract liability in accordance with ASC 606 and will be recognized as revenue over the life of the contract.

During the fourth quarter of 2021, the Company entered into two amendments to an agreement for firm transportation service (FTS) with EQT that, subject to the satisfaction of certain conditions, would have the effect of extending the primary term of the FTS. As a result of the potential extension, management reassessed the expected gathering fee credit assumptions and, as a result of the impacts to such assumptions, the total consideration expected under the EQT Global GGA was reduced. The Company recognized a cumulative adjustment that decreased revenue and increased contract liability by $123.7 million, respectively, during the year ended December 31, 2021. The cumulative adjustment had no impact to the amount billed to and cash collected from EQT under the EQT Global GGA.

The EQT Global GGA provides for potential cash bonus payments payable by EQT to the Company during the period beginning on the first day of the calendar quarter in which the MVP full in-service date occurs through the calendar quarter ending December 31, 2024 (the Henry Hub cash bonus payment provision). The potential cash bonus payments are conditioned upon the quarterly average of certain Henry Hub natural gas prices exceeding certain price thresholds. The Henry Hub cash bonus payment provision meets the definition of an embedded derivative that was required to be bifurcated from the host contract and accounted for separately in accordance with ASC 815, Derivatives and Hedging. The embedded derivative was recorded as a derivative asset at its estimated fair value at inception of approximately $51.5 million and as part of the contract liability to be included in the total consideration to be allocated to the performance obligation under ASC 606. Subsequent changes to the fair value of the derivative instrument through the end of the contract are recognized in other (expense) income, net, on the Company's statements of consolidated comprehensive income.

Water Services Letter Agreement and 2021 Water Services Agreement. On February 26, 2020, the Company entered into a letter agreement with EQT relating to the provision of water services in Pennsylvania (such letter agreement, the Water Services Letter Agreement). Subject to the effect of the 2021 Water Services Agreement (as defined below), the Water Services Letter Agreement would have been effective as of the first day of the first month following the MVP full in-service date and would have expired on the fifth anniversary of such date. During each year of the Water Services Letter Agreement, EQT had agreed to pay the Company a minimum $60 million per year Annual Revenue Commitment (ARC) for volumetric water services provided in Pennsylvania, all in accordance with existing water service agreements and new water service agreements entered into between the parties pursuant to the Water Services Letter Agreement (or the related agreements).

On October 22, 2021, the Company and EQT entered into a new 10-year, mixed-use water services agreement covering operations within a dedicated area in southwestern Pennsylvania (as subsequently amended, the 2021 Water Services Agreement). The 2021 Water Services Agreement, which upon its effectiveness, replaces the Water Services Letter Agreement and certain other existing Pennsylvania water services agreements, will become effective with the commencement of water delivery service to a certain EQT well pad (anticipated in the first quarter of 2022). Pursuant to the 2021 Water Services Agreement, EQT has agreed to pay the Company a minimum ARC for water services equal to $40 million in each of the first five years of the 10-year contract term and equal to $35 million per year for the remaining five years of the contract term.

Share Purchase Agreements. On February 26, 2020, the Company entered into two share purchase agreements (the Share Purchase Agreements) with EQT, pursuant to which the Company agreed to (i) purchase 4,769,496 shares of Equitrans Midstream common stock (the Cash Shares) from EQT in exchange for approximately $46 million in cash, (ii) purchase

20,530,256 shares of Equitrans Midstream common stock (the Rate Relief Shares and, together with the Cash Shares, the Share Purchases) from EQT in exchange for a promissory note in the aggregate principal amount of approximately $196 million (which EQT subsequently assigned to EQM as consideration for certain commercial terms under the EQT Global GGA), and (iii) pay EQT cash in the amount of approximately $7 million (the Cash Amount). On March 5, 2020, the Company completed the Share Purchases and paid the Cash Amount. The Company used proceeds from the EQM Credit Facility (defined in Note 11) to fund the purchase of the Cash Shares and to pay the Cash Amount in addition to other uses of proceeds. After the closing of the Share Purchases, the Company retired the Cash Shares and the Rate Relief Shares. Additionally, the Company recorded a $17.2 million deferred tax liability in conjunction with the Rate Relief Shares. On September 29, 2020, the Company made a prepayment to EQM of all principal, interest, fees and other obligations outstanding under the promissory note EQT assigned to EQM and the promissory note was terminated.

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Leases

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Leases

Leases

The Company has certain facility and compressor operating lease contracts that are classified as operating leases in accordance with ASC 842. Leases with an initial term of 12 months or less are considered short-term and are not recorded on the balance sheet. Instead, the short-term leases are recognized in expense on a straight-line basis over the lease term. Upon the adoption of ASC 842 on January 1, 2019, the Company recorded an operating lease right-of-use asset and a corresponding operating lease liability of $49.7 million on its consolidated balance sheets, reflecting the then present value of future lease payments on the Company's facility and compressor lease contracts. As of December 31, 2021 and 2020, the Company had no lease contracts classified as financing leases and was not a lessor; however, the Company was party to a subleasing arrangement whereby the Company, as sublessor, agreed to sublet office space to a third party.

The following table summarizes lease cost for the years ended December 31, 2021, 2020 and 2019:

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Operating lease cost	$	12,571	$	14,464	$	12,858
Short-term lease cost	6,057		5,075		4,642
Variable lease cost	7		168		321
Sublease income	(492)		(583)		(445)
Total lease cost	$	18,143	$	19,124	$	17,376

Operating lease expense related to the Company's compressor lease contracts and facility lease contracts is reported in operating and maintenance expense and selling, general and administrative expense, respectively, on the Company's statements of consolidated comprehensive income.

For the years ended December 31, 2021, 2020 and 2019, cash paid for operating lease liabilities was $12.8 million, $14.8 million and $12.3 million, respectively, which was reported in cash flows provided by operating activities on the statements of consolidated cash flows.

The operating lease right-of-use assets are reported in other assets and the current and noncurrent portions of the operating lease liabilities are reported in accrued liabilities and regulatory and other long-term liabilities, respectively, on the consolidated balance sheets. As of December 31, 2021 and 2020, the operating lease right-of-use assets were $43.4 million and $53.2 million, respectively, and operating lease liabilities were $44.4 million and $53.4 million, respectively, of which $8.3 million and $10.0 million, respectively, was classified as current. As of December 31, 2021 and 2020, the weighted average remaining lease terms were seven years and eight years, respectively, and the weighted average discount rates were 5.8% and 5.7%, respectively.

The following table summarizes undiscounted cash flows owed by the Company to lessors pursuant to noncancelable contractual agreements in effect as of December 31, 2021 and related imputed interest.

	December 31, 2021
	(Thousands)
2022	$	10,404
2023	8,065
2024	6,190
2025	4,970
2026	5,040
Thereafter	20,652
Total	55,321
Less: imputed interest	10,911
Present value of operating lease liability	$	44,410

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Related Party Transactions

12 Months Ended

Dec. 31, 2021

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

Related Party Transactions with EQT

As of December 31, 2021, EQT remained a related party to the Company due to its ownership of 22,796,026 shares of Equitrans Midstream common stock, which represented an approximately 5.3% ownership interest in the Company, excluding the impact of the Equitrans Midstream Preferred Shares. In the ordinary course of business, the Company engaged, and continues to engage, as applicable, in transactions with EQT and its affiliates, including, but not limited to, gathering agreements, transportation service and precedent agreements, storage agreements and water services agreements.

Related Party Transactions with EQM

ETRN EQM Omnibus Agreements. Pursuant to an omnibus agreement with EQM, the EQM General Partner (as successor to the former EQM general partner) and the Company (the ETRN Omnibus Agreement), the Company performed centralized corporate, general and administrative services for EQM. In exchange, EQM reimbursed the Company for the expenses incurred by the Company in providing these services. In connection with the entry by EQM and the Company into an Assignment and Bill of Sale on March 31, 2019, the ETRN Omnibus Agreement was amended and restated, to, among other things, govern the Company's use, and payment for such use, of the acquired assets following their conveyance to EQM under the Assignment and Bill of Sale. In connection with the EQM Merger, the ETRN Omnibus Agreement terminated at the Effective Time, subject to the survival of certain license rights and indemnification obligations. See Note 2.

Secondment Agreement. Pursuant to a secondment agreement, employees of the Company and its affiliates were, prior to the closing of the EQM Merger, seconded to EQM to provide operating and other services with respect to EQM's business under the direction, supervision and control of EQM. EQM reimbursed the Company and its affiliates for the services provided by the seconded employees. The expenses for which EQM reimbursed the Company and its affiliates were not necessarily reflective of the actual expenses that EQM would incur on a stand-alone basis. EQM is unable to estimate what those expenses would be on a stand-alone basis. In connection with the EQM Merger, the Company's secondment agreement with EQM terminated at the Effective Time. See Note 2.

Summary of Related Party Transactions

The following table summarizes the Company's related party transactions.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Operating revenues	$	777,276	$	964,220	$	1,122,626
Separation and other transaction costs	—		—		(1,440)
Equity income (a)	17,579		233,833		163,279
Interest income from the Preferred Interest	5,767		6,053		6,324
Capital contributions to the MVP Joint Venture (a)	(287,665)		(272,801)		(774,593)
Principal payments received on the Preferred Interest	5,217		5,003		4,661
Net distributions to EQT	—		—		(93,666)

(a)Associated with the Company's ownership in the MVP Joint Venture. See Note 9 for further detail.

The following table summarizes the Company's related party receivables and payables.

	December 31,
	2021		2020
	(Thousands)
Accounts receivable	$	190,410	$	199,674
Contract asset	2,246		2,207
Investments in unconsolidated entity	1,239,039		2,796,316
Preferred Interest	99,838		105,056
Capital contributions payable to the MVP Joint Venture	72,188		10,723
Contract liability	818,658		398,750

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Investment in Unconsolidated Entity

12 Months Ended

Dec. 31, 2021

Equity Method Investments and Joint Ventures [Abstract]

Investment in Unconsolidated Entity

Investment in Unconsolidated Entity

The MVP Joint Venture is constructing the Mountain Valley Pipeline (MVP), an estimated 300-mile natural gas interstate pipeline that is designed to span from northern West Virginia to southern Virginia. The Company will operate the MVP and owned a 46.8% interest in the MVP project as of December 31, 2021. On November 4, 2019, Consolidated Edison, Inc. (Con Edison) exercised an option to cap its investment in the construction of the MVP project at approximately $530 million (excluding AFUDC). The Company and NextEra Energy, Inc. are obligated to, and RGC Resources, Inc., another member of the MVP Joint Venture owning an interest in the MVP project, has opted to, fund the shortfall in Con Edison's capital contributions, on a pro rata basis. Such funding by the Company and funding by other members has and will correspondingly increase the Company's and such other funding members' respective interests in the MVP project and decrease Con Edison's interest in the MVP project. As a result, depending on the project's total cost, the Company's equity ownership in the MVP project will progressively increase to a percentage in excess of approximately 46.8%. The MVP Joint Venture is a variable interest entity because it has insufficient equity to finance its activities during the construction stage of the project. The Company is not the primary beneficiary of the MVP Joint Venture because the Company does not have the power to direct the activities that most significantly affect the MVP Joint Venture's economic performance. Certain business decisions, such as decisions to make distributions of cash, require a greater than 66 2/3% ownership interest approval, and no one member owns more than a 66 2/3% interest.

In April 2018, the MVP Joint Venture announced the MVP Southgate project, which is a proposed 75-mile interstate pipeline that is contemplated to extend from the MVP at Pittsylvania County, Virginia to new delivery points in Rockingham and Alamance Counties, North Carolina. The Company is expected to operate the MVP Southgate pipeline and owned a 47.2% interest in the MVP Southgate project as of December 31, 2021. The MVP Joint Venture is evaluating the MVP Southgate project, including engaging in discussions with the project shipper, Dominion Energy North Carolina, regarding options with respect to the project, including potentially refining the project’s design and timing in lieu of pursuing the project as originally contemplated. Dominion Energy North Carolina’s obligations under the precedent agreement in support of the original project are subject to certain conditions, including that the MVP Joint Venture complete construction of the project facilities by June 1, 2022, which deadline is subject to extension by virtue of previously declared events of force majeure. The Company is unable to predict the results of the discussions between the MVP Joint Venture and Dominion Energy North Carolina, including any potential modifications to the project, or ultimate undertaking or completion of the project.

In November 2021, the MVP Joint Venture issued a capital call notice for the funding of the MVP project to MVP Holdco, LLC (MVP Holdco), a wholly owned subsidiary of the Company, for $72.0 million, of which $52.9 million and $19.1 million was paid in January 2022 and February 2022, respectively. The capital contributions payable and the corresponding increase to the investment balance are reflected on the consolidated balance sheet as of December 31, 2021.

Pursuant to the MVP Joint Venture's limited liability company agreement, MVP Holdco is obligated to provide performance assurances, which may take the form of a guarantee from EQM (provided that EQM's debt is rated as investment grade in accordance with the requirements of the MVP Joint Venture's limited liability company agreement), a letter of credit or cash collateral, in favor of the MVP Joint Venture to provide assurance as to the funding of MVP Holdco's proportionate share of the construction budget for the MVP project.

In addition, pursuant to the MVP Joint Venture's limited liability company agreement, MVP Holdco is obligated to provide performance assurances in respect of MVP Southgate, which performance assurances may take the form of a guarantee from EQM (provided that EQM's debt is rated as investment grade in accordance with the requirements of the MVP Joint Venture's limited liability company agreement), a letter of credit or cash collateral.

Based on EQM's credit rating levels in the first quarter of 2020, EQM delivered replacement credit support to the MVP Joint Venture in the form of letters of credit in the amounts of approximately $220.2 million and $14.2 million with respect to the MVP and MVP Southgate projects, respectively. In connection with delivering such letters of credit as replacement performance assurances, EQM's performance guarantees associated with the MVP and MVP Southgate projects were terminated. As of December 31, 2021, the letter of credit with respect to the MVP project was in the amount of approximately $219.7 million. Upon the FERC’s initial release to begin construction of the MVP Southgate project, the Company’s current letter of credit to support MVP Southgate will be terminated, and the Company will be obligated to deliver a new letter of credit (or provide another allowable form of performance assurance) in an amount equal to 33% of MVP Holdco’s proportionate share of the remaining capital obligations for the MVP Southgate project under the applicable construction budget.

The following tables summarize the condensed consolidated financial statements of the MVP Joint Venture in relation to the MVP project.

Condensed Consolidated Balance Sheets

	December 31,
	2021		2020
	(Unaudited)
	(Thousands)
Current assets	$	148,820	$	146,054
Non-current assets	6,432,288		5,848,298
Total assets	$	6,581,108	$	5,994,352
Current liabilities	$	160,331	$	217,086
Equity	6,420,777		5,777,266
Total liabilities and equity	$	6,581,108	$	5,994,352

Condensed Statements of Consolidated Operations

	Years Ended December 31,
	2021		2020		2019
	(Unaudited)
	(Thousands)
Operating expenses	$	(399)	$	(360)	$	(2,416)
Other income	18		288		6,243
Net interest income	11,452		150,995		105,382
AFUDC – equity	26,722		352,323		245,890
Net income	$	37,793	$	503,246	$	355,099

The Company's ownership interest in the MVP Joint Venture related to the MVP project is significant for the years ended December 31, 2020 and 2019 as defined by the SEC’s Regulation S-X Rule 1-02(w). Accordingly, as required by Regulation S-X Rule 3-09, the Company has included audited financial statements of the MVP Joint Venture, with respect to the MVP project, as of December 31, 2020 and for the years ended December 31, 2020 and 2019 as Exhibit 99.1 to this Annual Report on Form 10-K.

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Share-based Compensation Plans

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Abstract]

Share-based Compensation Plans

Share-based Compensation Plans

The Company maintains employee share-based compensation plans for restricted stock, restricted stock units, performance awards, stock options and other equity or cash-based awards as governed by the Equitrans Midstream Corporation 2018 Long-Term Incentive Plan, as amended (the 2018 Plan), which was effective as of November 12, 2018. Non-employee members of the Company's Board receive phantom units in connection with their board service payable in Company common stock upon the director's termination of services from the Board. The 2018 Plan's term is through the 2028 shareholders' meeting and the maximum number of shares of common stock that may be issued and as to which awards may be granted under the 2018 Plan is 38,592,386 shares.

In accordance with an Employee Matters Agreement by and between the Company and EQT entered into on November 12, 2018 in connection with the Separation (Employee Matters Agreement), previously outstanding share-based compensation

awards granted under EQT's equity compensation programs prior to the Separation and held by certain executives and employees of the Company and EQT were adjusted to reflect the impact of the Separation on these awards. To preserve the aggregate intrinsic value of EQT awards held prior to the Separation, as measured immediately before and immediately after the Separation (excluding EQT option awards which were converted in accordance with the conversion provisions set forth in the Employee Matters Agreement), each holder of EQT share-based compensation awards generally received an adjusted award consisting of both a share-based compensation award denominated in EQT equity and a share-based compensation award denominated in Company equity. These awards were adjusted in accordance with the basket method, resulting in participants retaining one unit of the existing EQT incentive award while receiving an additional 0.8 units of a Company-based award and included awards that were share-settled and awards satisfied in cash, which were treated as liability awards. The Company recognizes share-based compensation expense related to unvested awards held by its employees, no matter which entity settles the obligation.

Changes in performance and the number of outstanding awards can impact the ultimate amount of the Company's performance awards to be settled. Share-based awards to be settled in Equitrans Midstream common stock upon settlement are funded by shares acquired by the Company in the open market or from any other person, stock issued directly by the Company or any combination of the foregoing. Share counts for share-based compensation discussed herein represent outstanding shares to be remitted by the Company to (i) its employees in connection with compensation programs adopted by the Company and (ii) employees of the Company and EQT (or, as applicable, former employees of the Company or EQT) pursuant to the Employee Matters Agreement.

The following table summarizes the components of share-based compensation expense for the years ended December 31, 2021, 2020 and 2019.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
2017 Incentive PSU Program	—		—		(893)
2018 Incentive PSU Program	—		698		(360)
2019 Equitrans Midstream PSU Program	984		4,935		—
2020 Equitrans Midstream PSU Program	1,297		2,317		—
2021 Equitrans Midstream PSU Program	5,940		—		—
2018 EQT Value Driver Performance Share Unit Award Program	—		—		637
Restricted stock awards	11,268		7,422		5,197
Other programs, including non-employee director awards	3,205		1,577		1,833
Total share-based compensation expense	$	22,694	$	16,949	$	6,414

The Company capitalizes compensation cost for its share-based compensation awards based on an employee's job function. Capitalized compensation costs for the years ended December 31, 2021, 2020 and 2019 were $4.2 million, $1.9 million and ($0.5) million, respectively. The Company recorded $2.0 million, $0.2 million, and $0.7 million for the years ended December 31, 2021, 2020 and 2019, respectively, of tax expense for excess tax benefits related to share-based compensation plans.

Performance Share Unit Programs – Equity & Liability

The Company assumed portions of the 2017 EQT Incentive Performance Share Unit Program (2017 Incentive PSU Program) and the 2018 EQT Incentive Performance Share Unit Program (2018 Incentive PSU Program) at the Separation Date.

The Management Development and Compensation Committee of the Company's Board (the Compensation Committee) adopted the Equitrans Midstream Corporation 2019 Performance Share Unit Program (the 2019 Equitrans Midstream PSU Program), the Equitrans Midstream Corporation 2020 Performance Share Unit Program (the 2020 Equitrans Midstream PSU Program) and the Equitrans Midstream Corporation 2021 Performance Share Unit Program (the 2021 Equitrans Midstream PSU Program).

The 2017 Incentive PSU Program, the 2018 Incentive PSU Program (collectively, the EQT Incentive PSU Programs), the 2019 Equitrans Midstream PSU Program, the 2020 Equitrans Midstream PSU Program and the 2021 Equitrans Midstream PSU Program (collectively, the Equitrans Midstream PSU Programs) are referred to herein as the Incentive PSU Programs. The Incentive PSU Programs vest in both equity and liability awards.

The Company established the Equitrans Midstream PSU Programs to provide long-term incentive opportunities to key employees to further align their interests with those of the Company's shareholders and with the strategic objectives of the Company. The performance period for each of the awards under the Incentive PSU Programs, except for the 2020 Equitrans Midstream PSU Program, is 36 months, with vesting occurring upon payment following the expiration of the performance period, subject to continued service through such vesting date. The awards under the 2020 Equitrans Midstream PSU Program may be earned over four separate performance periods as follows: (i) 20% for each of the three calendar years that occur following the vesting commencement date (i.e., the 2020, 2021 and 2022 calendar years) and (ii) 40% for the cumulative three-year period following the vesting commencement date (i.e., January 1, 2020 through December 31, 2022), with vesting occurring upon payment following the expiration of the cumulative three-year performance period, subject to continued service through such vesting date.

The 2019 Equitrans Midstream PSU Program awards will be earned based on the level of Equitrans Midstream total shareholder return relative to a predefined peer group and the cumulative Equitrans Midstream total shareholder return.

The Equitrans Midstream PSU Program awards granted in 2020 and 2021 will be earned based on the level of Equitrans Midstream total shareholder return relative to a predefined peer group (with respect to the 2020 Equitrans Midstream PSU Program awards not to exceed 100% if the Company's total shareholder return is less than zero percent).

The payout factor for the Equitrans Midstream PSU Programs vary between zero and 200% of the number of outstanding units, each contingent on the applicable performance metrics. The Company recorded the portions of the Incentive PSU Programs to be settled in stock as equity awards using a grant date fair value determined through a Monte Carlo simulation, which projects the common stock price for EQT or the Company, as applicable, and their peers at the ending point of the applicable performance period. The Incentive PSU Programs also included awards to be settled in cash and, therefore, were recorded at fair value as of the measurement date determined through a Monte Carlo simulation, which projects the common stock price for EQT or the Company, as applicable, and their peers at the ending point of the applicable performance period. The expected share prices were generated using each company's annual volatility for the expected term and the commensurate three-year or two-year risk-free rates (each shown in the chart below) for equity awards and liability awards, respectively. The vesting of units under each Incentive PSU Program occurs upon payment following the expiration of the applicable performance period, subject to continued service through such date, and the satisfaction of the underlying performance or market condition.

The following table provides detailed information on each award:

Incentive PSU Program	Settled In	Accounting Treatment	Fair Value (a)		Vested/ Payment Date	Awards Paid	Value (Millions)		Unvested/ Expected Payment Date	Awards Outstanding as of December 31, 2021 (b)
2017	Stock	Equity	$	120.60	February 2020	66,822	$	8.1	N/A	N/A
2017	Cash	Liability	$	13.36	February 2020	146,387	2.0		N/A	N/A
2018	Stock	Equity	$	76.53	February 2021	40,349	3.1		N/A	N/A
2018T1	Cash	Liability	$	8.04	February 2021	40,769	0.3		N/A	N/A
2018T2	Cash	Liability	$	—	February 2021	—	—		N/A	N/A
2019	Stock	Equity	$	15.03	N/A	N/A	N/A		First Quarter of 2022	474,488
2019	Cash	Liability	$	—	N/A	N/A	N/A		First Quarter of 2022	209,525
2020	Stock	Equity	$	5.59	N/A	N/A	N/A		First Quarter of 2023	703,583
2020	Cash	Liability	$	7.19	N/A	N/A	N/A		First Quarter of 2023	406,050
2021	Stock	Equity	$	8.77	N/A	N/A	N/A		First Quarter of 2024	1,481,126
2021	Cash	Liability	$	13.73	N/A	N/A	N/A		First Quarter of 2024	856,190

(a)Grant date fair value was determined using a Monte Carlo simulation for equity awards. For unvested liability awards, the fair value was determined using a Monte Carlo simulation as of the measurement date. For vested liability awards, the fair value is equal to the Company’s stock price at the end of the performance period.

(b)Represents the number of outstanding units as of December 31, 2021, adjusted for forfeitures, to be settled in stock or cash.

Fair value is estimated using a Monte Carlo simulation valuation method with the following weighted average assumptions:

	For Incentive PSU Programs Issued During the Years Ended December 31,
	2021				2020				2019
Accounting Treatment	Liability (a)		Equity		Liability (a)		Equity			Equity
Risk-free rate	0.67	%	0.16	%	0.28	%	0.39	%		2.54	%
Dividend yield	N/A		N/A		N/A		N/A			N/A
Volatility factor	61.0	%	61.0	%	42.0	%	53.0	%		30.0	%
Expected term	2 years		3 years		1 year		3 years			3 years

(a)Information shown for the valuation of the liability plan is as of the measurement date.

Restricted Stock Awards – Equity

The Company granted 660,250, 491,640 and 344,796 restricted stock equity awards during the years ended December 31, 2021, 2020 and 2019, respectively, to key employees of the Company. The restricted stock granted will be fully vested at the end of the three-year period commencing with the vesting commencement date, assuming continued service through such date.

As of December 31, 2021, $5.5 million of unrecognized compensation cost related to non-vested restricted stock equity awards was expected to be recognized over a remaining weighted average vesting term of approximately 1.24 years.

A summary of restricted stock equity award activity during the year ended December 31, 2021 is presented below.

	Non-vested Shares (a)	Weighted Average Fair Value		Aggregate Grant Date Fair Value
Outstanding at January 1, 2021	841,068	$	17.08	$	14,366,346
Granted	660,250	8.04		5,308,410
Vested	(58,185)	44.20		(2,572,026)
Forfeited	(49,732)	11.17		(555,522)
Outstanding at December 31, 2021	1,393,401	$	11.88	$	16,547,208

(a)Non-vested shares outstanding at December 31, 2021 will be settled by the Company once vested, assuming continued service through such date.

Restricted Stock Unit Awards – Liability

The Company granted 430,800, 455,619, and 271,233 restricted stock liability awards during the years ended December 31, 2021, 2020 and 2019, respectively, to key employees of the Company. The restricted stock units granted will be fully vested at the end of the three-year period commencing with the vesting commencement date, assuming continued service through such date. The total liability recorded for these restricted units was $7.9 million and $4.5 million as of December 31, 2021 and 2020, respectively.

A summary of restricted stock unit liability award activity during the year ended December 31, 2021 is presented below.

	Non-vested Shares (a)	Weighted Average Fair Value		Aggregate Grant Date Fair Value
Outstanding at January 1, 2021	877,596	$	15.46	$	13,565,895
Granted	430,800	8.06		3,472,652
Vested	(190,036)	20.76		(3,944,942)
Forfeited	(38,656)	10.73		(414,837)
Outstanding at December 31, 2021	1,079,704	$	11.74	$	12,678,768

(a)Non-vested shares outstanding at December 31, 2021 will be settled by the Company once vested, assuming continued service through such date.

Value Driver Performance Share Unit Award Programs

Under the 2018 EQT Value Driver Performance Share Unit Award Program (the 2018 EQT VDA), 50% of the awards confirmed vested upon payment following the first anniversary of the grant date, and the remaining 50% of the awards confirmed vested upon payment following the second anniversary of the grant date subject to continued service through such dates.

The following table provides detailed information on the 2018 EQT VDA award:

EQT VDA Program	Settled In	Accounting Treatment	Fair Value per Unit (a)		Vested/ Payment Date	Cash Paid (Millions)		Unvested/ Expected Payment Date	Awards Outstanding as of December 31, 2021
2018	Cash	Liability	$	20.02	February 2019	$	4.1	N/A	N/A
2018	Cash	Liability	$	13.36	February 2020	$	2.3	N/A	N/A

(a)The fair value per unit is based on the Company's common stock price on the measurement date.

Non-Qualified Stock Options

In connection with the Separation, the Company assumed stock options related to EQT share-based compensation awards. Stock options outstanding and exercisable as of December 31, 2021 were 464,876, have a weighted average exercise price of $38.55 and expire between 2022 and 2028. There was no stock option activity during the years ended December 31, 2021, 2020 and 2019. There were no unrecognized compensation costs related to outstanding non-vested stock options as of December 31, 2021.

Phantom Units

The Company grants phantom unit awards to certain non-employee directors that serve or at the time of grant served on the Board. Director phantom units expected to be satisfied in Company common stock vest on the date of grant and are recorded based on the grant date fair value, which is determined based upon the closing price of the Company’s common stock on the trading day before the grant date. The value of director phantom units is paid in Company common stock upon the director's termination of service on the Board. Prior to the completion of the EQGP Buyout and the EQM Merger, respectively, EQGP's general partner and EQM's general partner, as applicable, granted phantom unit awards to certain non-employee directors of EQGP's general partner and EQM's general partner, respectively. A total of 512,440 Equitrans Midstream non-employee director share-based awards including accrued dividends were outstanding as of December 31, 2021.

A summary of phantom units' activity for the years ended December 31, 2021, 2020 and 2019 is presented below.

	Years Ended December 31,
	2021					2020					2019
	Grants	Weighted Average Fair Value		Compensation Expense (Millions)		Grants	Weighted Average Fair Value		Compensation Expense (Millions)		Grants	Weighted Average Fair Value		Compensation Expense (Millions)
Equitrans Midstream phantom units	149,280	$	8.04	$	1.2	92,760	$	11.51	$	1.1	45,000	$	20.02	$	0.9
EQGP phantom units (a)	—	$	—	$	—	—	$	—	$	—	8,500	$	20.00	$	0.2
EQM phantom units(b)	—	$	—	$	—	9,540	$	29.91	$	0.3	5,910	$	43.25	$	0.3

(a)In connection with the completion of the EQGP Buyout, the non-employee directors of EQGP's general partner were paid the Purchase Price for each EQGP phantom unit that they held. See Note 2.

(b)In connection with the closing of the EQM Merger, the non-employee directors of the EQM General Partner received the Merger Consideration for each EQM phantom unit that they held. See Note 2.

2022 Awards

Effective in January 2022, the Compensation Committee adopted the Equitrans Midstream Corporation 2022 Performance Share Unit Program (2022 PSU Program) under the 2018 Plan. The 2022 PSU Program was established to align the interests of key employees with the interests of shareholders and the strategic objectives of the Company.

In January 2022, 1,997,750 units were granted under the 2022 PSU Program. The vesting of the units under the 2022 PSU Program will occur upon payment after the expiration of the Performance Period, which is January 1, 2022 to December 31, 2024, assuming continued employment with the Company. The payout will vary between zero and 200% of the number of outstanding units contingent upon the level of total shareholder return relative to a predefined peer group during the Performance Period. If earned at the target payout level of 100%, 1,274,910 of the 2022 PSU Program units are expected to be distributed in Company common stock and 722,840 of the 2022 PSU Program units are expected to be paid in cash.

In January 2022, 546,520 restricted stock equity and 310,320 restricted stock unit liability awards were granted. The restricted stock equity awards and restricted stock unit liability awards will be fully vested at the end of the three-year period commencing on January 1, 2022, assuming continued employment with the Company.

Employee Savings Plan

For the years ended December 31, 2021, 2020 and 2019, the Company recognized expense related to its defined contribution plan of $7.6 million, $8.1 million and $7.8 million, respectively.

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Debt

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Debt

Debt

The following table presents the Company's and its consolidated subsidiaries' outstanding debt as of December 31, 2021 and 2020.

	December 31, 2021						December 31, 2020
	Principal		Carrying Value(a)		Fair Value(b)		Principal		Carrying Value(a)		Fair Value(b)
	(Thousands)
Amended EQM Credit Facility	$	225,000	$	225,000	$	225,000	$	485,000	$	485,000	$	485,000
Eureka Credit Facility (c)	280,000		280,000		280,000		302,500		302,500		302,500
Total credit facility borrowings	$	505,000	$	505,000	$	505,000	$	787,500	$	787,500	$	787,500
Amended 2019 EQM Term Loan Agreement	—		—		—		1,400,000		1,397,768		1,400,000
EQM 4.00% Senior Notes due 2024	500,000		498,014		522,695		500,000		497,245		515,455
EQM 4.125% Senior Notes due 2026	500,000		495,816		517,695		500,000		494,966		512,285
EQM 4.50% Senior Notes due 2029	800,000		790,927		834,856		—		—		—
EQM 4.75% Senior Notes due 2023	600,000		598,088		628,380		1,100,000		1,094,235		1,162,590
EQM 4.75% Senior Notes due 2031	1,100,000		1,087,493		1,166,220		—		—		—
EQM 5.50% Senior Notes due 2028	850,000		842,657		939,684		850,000		841,538		933,980
EQM 6.50% Senior Notes due 2048	550,000		539,778		673,458		550,000		539,393		582,995
EQM 6.00% Senior Notes due 2025	700,000		692,662		763,091		700,000		690,565		767,375
EQM 6.50% Senior Notes due 2027	900,000		889,510		1,014,417		900,000		887,602		1,020,060
Total long-term debt	$	6,500,000	$	6,434,945	$	7,060,496	$	6,500,000	$	6,443,312	$	6,894,740

(a)Carrying values of the senior notes and term loans represent principal amount less unamortized debt issuance costs and debt discounts.

(b)See Note 12 for a discussion of fair value measurements.

(c)Includes aggregate borrowings outstanding on the 2021 Eureka Credit Facility (as defined below) as of December 31, 2021 and on the Former Eureka Credit Facility (as defined below) as of December 30, 2020.

As of December 31, 2021, the combined aggregate amounts of maturities for long-term debt were as follows: zero in 2022, $0.6 billion in 2023, $0.5 billion in 2024, $0.7 billion in 2025, $0.5 billion in 2026 and $4.2 billion in 2027 and thereafter.

Equitrans Midstream Term Loan Facility. In December 2018, Equitrans Midstream entered into a term loan credit agreement (as amended in May 2019, the ETRN Term Loan Credit Agreement) that provided for a senior secured term loan facility in an aggregate principal amount of $600 million (the ETRN Term Loans). The Company received net proceeds from the ETRN Term Loans of $568.1 million, inclusive of a discount of $18.0 million and estimated debt issuance costs of $13.9 million. The net proceeds were primarily used to fund the EQGP Buyout, including certain fees, costs and expenses in connection therewith, and the remainder was used for general corporate purposes. On March 3, 2020, EQM drew $650.0 million under the EQM Credit Facility (defined below) and transferred such funds to the Company, pursuant to a senior unsecured term loan agreement with the Company. The Company utilized a portion of such funds to pay off all of the amounts outstanding under the ETRN Term Loans and the ETRN Term Loan Credit Agreement was terminated. As a result, the Company wrote off $24.4 million of unamortized discount and financing costs related to the ETRN Term Loan Credit Agreement. The write off charge is included in the loss on early extinguishment of debt line on the statements of consolidated comprehensive income. On September 29, 2020, the Company made a prepayment to EQM of all principal, interest, fees and other obligations outstanding under the senior unsecured term loan agreement and terminated the agreement. During the period from January 1, 2020 to March 3, 2020, the weighted average annual interest rate was approximately 6.2%. For the year ended December 31, 2019, the weighted average annual interest rate was approximately 6.8%.

Equitrans Midstream Credit Facility. In October 2018, Equitrans Midstream entered into a senior secured revolving credit facility agreement that provided for $100 million in borrowing capacity (the Equitrans Midstream Credit Facility). Equitrans Midstream amended the Equitrans Midstream Credit Facility on December 31, 2018 to, among other things, permit the incurrence of the borrowings under the ETRN Term Loan Credit Agreement. The Equitrans Midstream Credit Facility, which was available for general corporate purposes and to fund ongoing working capital requirements, was terminated on March 3, 2020 in conjunction with the Company's termination of the ETRN Term Loan Credit Agreement (see above). As a result, the Company wrote off $0.5 million of unamortized financing costs related to the Equitrans Midstream Credit Facility. The write off charge is included in the loss on early extinguishment of debt line on the statements of consolidated comprehensive income.

The Company had no borrowings and no letters of credit outstanding under the Equitrans Midstream Credit Facility during the period from January 1, 2020 to March 3, 2020. During the year ended December 31, 2019, the maximum outstanding borrowings under the Equitrans Midstream Credit Facility was $44 million, the average daily balance was approximately $3.2 million and the weighted average annual interest rate was 4.2%. Commitment fees paid to maintain credit availability under the Equitrans Midstream Credit Facility were approximately $0.1 million for the period from January 1, 2020 to March 3, 2020, and $0.5 million for the year ended December 31, 2019.

EQM Revolving Credit Facility. On October 31, 2018, EQM amended and restated its unsecured revolving credit facility to increase the borrowing capacity from $1 billion to $3 billion and extend the term to October 2023 (the EQM Credit Facility). On March 30, 2020, EQM entered into an amendment (the First Amendment) to the EQM Credit Facility (as amended, the First Amended EQM Credit Facility) which, among other things, amended certain defined terms and negative covenants in the EQM Credit Facility. On April 16, 2021, EQM entered into a second amendment (the Second Amendment) to the EQM Credit Facility (as amended by the First Amendment and the Second Amendment, the Amended EQM Credit Facility). The Second Amendment amended, among other things:

•certain defined terms, including:

•the definition of “Applicable Rate” in the First Amended EQM Credit Facility such that: (i) Base Rate Loans (as defined in the Amended EQM Credit Facility) bear interest at a base rate plus a margin of 0.125% to 2.000% determined on the basis of EQM’s then-current credit ratings and (ii) Eurodollar Rate Loans (as defined in the Amended EQM Credit Facility) bear interest at a Eurodollar Rate (as defined in the Amended EQM Credit Facility) plus a margin of 1.125% to 3.000% also determined on the basis of EQM’s then-current credit ratings; and

•the definition of “Qualified Project” in the First Amended EQM Credit Facility and certain related definitions, which, collectively, have the effect of removing the designation of the MVP project and the Hammerhead pipeline as Qualified Projects on a go-forward basis after March 31, 2021 under the Amended EQM Credit Facility, and eliminating certain addbacks to Consolidated EBITDA (as defined in the Amended EQM Credit Facility) that previously were available in connection with the MVP project and the Hammerhead pipeline; and

•the financial covenant under the First Amended EQM Credit Facility, pursuant to which, except for certain measurement periods following the consummation of certain acquisitions during which the Consolidated Leverage Ratio (as defined in the Amended EQM Credit Facility) cannot exceed the greater of 5.50 to 1.00 or the maximum ratio otherwise permitted under the Amended EQM Credit Facility for the applicable period, the Consolidated Leverage Ratio cannot exceed, (i) for each fiscal quarter ending on and after June 30, 2021 and on or prior to September 30, 2022, 5.95 to 1.00, (ii) for the fiscal quarter ending on December 31, 2022, 5.25 to 1.00, and (iii) for each fiscal quarter ending after December 31, 2022, 5.00 to 1.00.

The Second Amendment also reduced the aggregate commitments available under the Amended EQM Credit Facility to $2.25 billion, and the commitment of each lender thereunder was reduced accordingly on a pro rata basis.

The Amended EQM Credit Facility is available for general partnership purposes, including to purchase assets, to make investments, to fund working capital requirements and capital expenditures and to pay distributions. Subject to satisfaction of certain conditions, the Amended EQM Credit Facility has an accordion feature that allows EQM to increase the available borrowings under the facility by up to an additional $750 million. The Amended EQM Credit Facility has a sublimit of up to $250 million for same-day swing line advances and a sublimit of up to $400 million for letters of credit. In addition, EQM has the ability to request that one or more lenders make available term loans under the Amended EQM Credit Facility subject to the satisfaction of certain conditions (which term loans would be secured by cash, qualifying investment grade securities or a combination thereof). The Company’s obligations in respect of the revolving borrowings made under the Amended EQM Credit Facility are unsecured. As of December 31, 2021, no term loans were outstanding under the Amended EQM Credit Facility.

As of December 31, 2021, EQM had approximately $225 million of borrowings and $234.9 million of letters of credit outstanding under the Amended EQM Credit Facility. As of December 31, 2020, EQM had approximately $485 million of borrowings and $246 million of letters of credit outstanding under the First Amended EQM Credit Facility. During the years ended December 31, 2021, 2020 and 2019, the maximum outstanding borrowings were $525 million, $2,040 million and $1,690 million, respectively; the average daily balances were approximately $395 million, $852 million and $846 million, respectively; and the weighted average annual interest rates were approximately 2.6%, 2.9% and 3.6%, respectively. For the years ended December 31, 2021, 2020 and 2019, commitment fees of $7.4 million, $7.2 million and $4.6 million, respectively, were paid to maintain credit availability under the Amended EQM Credit Facility.

Amended 2019 EQM Term Loan Agreement. In August 2019, EQM entered into a term loan agreement (the 2019 EQM Term Loan Agreement) that provided for unsecured term loans (the EQM Term Loans) in an aggregate principal amount of $1.4 billion. On March 30, 2020, EQM entered into an amendment to the 2019 EQM Term Loan Agreement (as amended, the Amended 2019 EQM Term Loan Agreement) which, among other things, amended certain defined terms and negative covenants in the 2019 EQM Term Loan Agreement.

On January 8, 2021, EQM (i) applied a portion of the proceeds from the issuance of the 2021 Senior Notes (as defined below) to prepay all principal, interest, fees and other obligations outstanding under the Amended 2019 EQM Term Loan Agreement and (ii) terminated the Amended 2019 EQM Term Loan Agreement and the loan documents associated therewith. EQM repaid outstanding loans with a principal amount of $1.4 billion in connection with the termination of the Amended 2019 EQM Term Loan Agreement. Prior to its termination in January 2021, the Amended 2019 EQM Term Loan Agreement would have matured in August 2022.

The Amended 2019 EQM Term Loan Agreement provided EQM with the right to request incremental term loans in an aggregate amount of up to $300 million, subject to, among other things, obtaining additional commitments from existing lenders or commitments from new lenders. As of December 31, 2020, EQM had $1.4 billion of borrowings outstanding under the Amended 2019 EQM Term Loan Agreement. During the period from January 1, 2021 through January 7, 2021, the weighted average annual interest rate was approximately 2.4%. During the year ended December 30, 2020 and for the applicable portions of the year ended December 31, 2019, the weighted average annual interest rates were approximately 2.7% and 3.3%, respectively.

Eureka Credit Facilities. On May 13, 2021, Eureka Midstream, LLC (Eureka), a wholly owned subsidiary of Eureka Midstream, repaid all outstanding principal borrowings plus accrued and unpaid interest under and terminated its credit facility with ABN AMRO Capital USA LLC, as administrative agent, the lenders party thereto from time to time and any other persons party thereto from time to time (the Former Eureka Credit Facility). No early termination or prepayment penalties were incurred as a result of the termination of the Former Eureka Credit Facility or the repayment of outstanding amounts under the facility. In connection with the termination of the Former Eureka Credit Facility, all guaranties and liens securing the obligations under the Former Eureka Credit Facility were terminated and released. Prior to its termination, the Former Eureka Credit Facility was scheduled to mature on August 25, 2021.

In conjunction with the termination of, and to fund the repayment of all outstanding amounts under the Former Eureka Credit Facility, on May 13, 2021, Eureka entered into a $400 million senior secured revolving credit facility with Sumitomo Mitsui Banking Corporation, as administrative agent, the lenders party thereto from time to time and any other persons party thereto from time to time (the 2021 Eureka Credit Facility). The 2021 Eureka Credit Facility matures on November 13, 2024, and is available for general business purposes, including financing maintenance and expansion capital expenditures related to the Eureka system and providing working capital for Eureka’s operations. Subject to the satisfaction of certain conditions, the 2021 Eureka Credit Facility has an accordion feature that allows Eureka to increase the available borrowings under the facility to an amount no greater than $500 million of total commitments. The 2021 Eureka Credit Facility also has a sublimit of up to $20 million for same-day swing line advances.

Under the terms of the 2021 Eureka Credit Facility, Eureka can obtain base rate loans or Eurodollar rate loans. Base rate loans are denominated in dollars and bear interest at an adjusted base rate, which is equal to the highest of (i) the prime rate as quoted by the Wall Street Journal, (ii) the one-month Adjusted Eurodollar Rate (as defined in the 2021 Eureka Credit Facility) plus 1.0% or (iii) the Federal Funds effective rate plus 0.5% per annum; plus the Applicable Margin (as defined in the 2021 Eureka Credit Facility). Eurodollar rate loans bear interest at the Adjusted Eurodollar Rate per annum, which rate is to be determined by the administrative agent pursuant to a prescribed calculation based on the ICE Benchmark Administration LIBOR Rate for committed loans, and the 30-day rate of interest per annum appearing in Bloomberg Page BBAM1 as the London interbank offered rate for deposits in dollars for swing line advances, plus the Applicable Margin. The Applicable Margin ranges from 1.00% to 2.25% in the case of base rate loans and from 2.00% to 3.25% in the case of Eurodollar rate loans, in each case, depending on Eureka's consolidated leverage ratio.

The 2021 Eureka Credit Facility contains negative covenants that, among other things, limit restricted payments, the incurrence of debt, dispositions, mergers and fundamental changes, securities issuances and transactions with affiliates, in each case and as applicable, subject to certain specified exceptions. In addition, the 2021 Eureka Credit Facility contains certain specified events of default such as insolvency, nonpayment of scheduled principal or interest obligations, loss and failure to replace certain material contracts, change of control and cross-default related to the acceleration or default of certain other financial obligations.

Under the 2021 Eureka Credit Facility, Eureka is required to maintain a Consolidated Leverage Ratio (as defined in the 2021 Eureka Credit Facility) of not more than 4.75 to 1.00 (or not more than 5.25 to 1.00 for certain measurement periods following the consummation of certain acquisitions), tested as of the end of each fiscal quarter. If Eureka has issued senior notes of $200 million or more in the aggregate as of the end of any fiscal quarter, then for such fiscal quarter and for each fiscal quarter thereafter, Eureka is required to maintain a Consolidated Leverage Ratio of not more than 5.25 to 1.00 and will not permit the ratio of senior indebtedness to four-quarter Consolidated EBITDA (as defined in the 2021 Eureka Credit Facility) as of the end of any such quarter to exceed 3.50 to 1.00. Additionally, as of the end of any fiscal quarter, Eureka will not permit the ratio of Consolidated EBITDA for the four fiscal quarters then ending to Consolidated Interest Charges (as defined in the 2021 Eureka Credit Facility) to be less than 2.50 to 1.00. Notwithstanding anything to the contrary, the 2021 Eureka Credit Facility provides Eureka with an equity cure right if it fails to abide by such financial covenants.

As of December 31, 2021, Eureka had approximately $280 million of borrowings outstanding under the 2021 Eureka Credit Facility. As of December 31, 2020, Eureka had approximately $303 million of borrowings under the Former Eureka Credit Facility. During the year ended December 31, 2021, the maximum amount of outstanding borrowings under either of the Eureka credit facilities at any time was $315 million, the average daily balance was approximately $301 million and Eureka incurred interest at weighted average annual interest rate of approximately 2.5%. For the year ended December 31, 2021, commitment fees of $0.5 million were paid to maintain credit availability under the Eureka credit facilities. During the year ended December 31, 2020, and for the period from April 10, 2019 through December 31, 2019, the maximum amount of outstanding borrowings under the Former Eureka Credit Facility at any time were approximately $323 million and $293 million, respectively, the average daily balances were approximately $301 million and $288 million, respectively, and Eureka incurred interest at weighted average annual interest rates of approximately 2.6% and 4.2%, respectively. For the year ended December 31, 2020 and for the period from April 10, 2019 through December 31, 2019, commitment fees of $0.6 million and $0.4 million were paid to maintain credit availability under the Former Eureka Credit Facility, respectively.

2021 Senior Notes. During the first quarter of 2021, EQM issued, in a private offering, $800 million aggregate principal amount of new 4.50% senior notes due 2029 (the 2029 Notes) and $1,100 million aggregate principal amount of new 4.75% senior notes due 2031 (the 2031 Notes and, together with the 2029 Notes, the 2021 Senior Notes) and received net proceeds from the offering of approximately $1,876.5 million (excluding costs related to the Tender Offers discussed below), inclusive of a discount of $19 million and debt issuance costs of $4.5 million. EQM used the net proceeds from the offering of the 2021 Senior Notes and cash on hand to repay all outstanding borrowings under the Amended 2019 EQM Term Loan Agreement, to purchase an aggregate principal amount of $500 million of its outstanding 4.75% notes due 2023 (2023 Notes) pursuant to tender offers for certain of EQM's outstanding indebtedness (such tender offers, the Tender Offers), and for general partnership purposes.

The 2021 Senior Notes were issued under and are governed by an indenture, dated January 8, 2021 (the 2021 Indenture), between EQM and The Bank of New York Mellon Trust Company, N.A., as trustee. The 2021 Indenture contains covenants that limit EQM’s ability to, among other things, incur certain liens securing indebtedness, engage in certain sale and leaseback transactions, and enter into certain consolidations, mergers, conveyances, transfers or leases of all or substantially all of EQM’s assets. The 2029 Notes will mature on January 15, 2029 and interest on the 2029 Notes is payable semi-annually on January 15 and July 15 of each year, commencing July 15, 2021. The 2031 Notes will mature on January 15, 2031 and interest on the 2031 Notes is payable semi-annually on January 15 and July 15 of each year, commencing July 15, 2021.

The 2021 Senior Notes are unsecured and rank equally with all of EQM’s existing and future senior obligations. The 2021 Senior Notes are senior in right of payment to any of EQM’s future obligations that are, by their terms, expressly subordinated in right of payment to the 2021 Senior Notes. The 2021 Senior Notes are effectively subordinated to EQM’s secured obligations, if any, to the extent of the value of the collateral securing such obligations, and structurally subordinated to all indebtedness and obligations, including trade payables, of EQM’s subsidiaries, other than any subsidiaries that may guarantee the 2021 Senior Notes in the future. EQM may, at its option, redeem some or all of the 2029 Notes and the 2031 Notes, in whole or in part, at any time prior to their maturity at the applicable redemption price as set forth in the 2021 Indenture.

Upon the occurrence of a Change of Control Triggering Event (as defined in the 2021 Indenture), EQM may be required to offer to purchase the 2021 Senior Notes at a purchase price equal to 101% of the aggregate principal amount of the 2021 Senior Notes repurchased, plus accrued and unpaid interest, if any, to, but excluding, the repurchase date.

The 2021 Indenture contains certain events of default, including the following: (i) default in the payment of interest on such 2021 Senior Notes when due that continues for 30 days; (ii) default in the payment of principal of or premium, if any, on any such 2021 Senior Notes when due, whether at its stated maturity, upon redemption or otherwise; (iii) failure by EQM or any subsidiary guarantor, if any, to comply for 90 days with the other agreements with respect to such 2021 Senior Notes contained in the 2021 Indenture after written notice by the trustee or by the holders of at least 25% in principal amount of the outstanding 2021 Senior Notes of such series; (iv) certain events of bankruptcy, insolvency or reorganization of EQM or any subsidiary guarantor, if any, that is one of EQM’s Significant Subsidiaries (as defined in the 2021 Indenture); and (v) if such 2021 Senior Notes are guaranteed by a subsidiary guarantor that is one of EQM’s Significant Subsidiaries, (a) the guarantee of that subsidiary guarantor ceases to be in full force and effect, except as otherwise provided in the 2021 Indenture; (b) the guarantee of that subsidiary guarantor is declared null and void in a judicial proceeding; or (c) that subsidiary guarantor denies or disaffirms its obligations under the 2021 Indenture or its guarantee.

If an event of default occurs and is continuing with respect to any of the 2021 Senior Notes, the trustee or the holders of at least 25% in aggregate principal amount of the then outstanding 2021 Senior Notes of such series may declare the 2021 Senior Notes of such series to be due and payable. Upon such a declaration, such principal, premium, if any, and accrued and unpaid interest on such 2021 Senior Notes will be due and payable immediately. If an event of default relating to certain events of bankruptcy, insolvency or reorganization occurs, all outstanding 2021 Senior Notes will become due and payable immediately without further action or notice on the part of the trustee or any holders of the 2021 Senior Notes.

Tender Offers. On January 15, 2021 (the early tender deadline), the maximum principal amount for the Tender Offers was fully subscribed by the 2023 Notes tendered as of the early tender deadline and on January 20, 2021, EQM purchased an aggregate principal amount of $500 million of 2023 Notes at an aggregate cost of approximately $537 million (inclusive of the applicable early tender premium for the 2023 Notes described in that certain Offer to Purchase of EQM dated January 4, 2021, as amended, plus accrued interest).

The Company incurred a loss on the extinguishment of debt of $41.0 million during the first quarter of 2021 related to the payment of the Tender Offer premium and write off of unamortized discounts and financing costs related to the prepayment of the EQM Term Loans under, and termination of, the Amended 2019 EQM Term Loan Agreement and purchase of 2023 Notes in the Tender Offers. This amount is included in the loss on extinguishment of debt line on the statements of consolidated comprehensive income.

2020 Senior Notes. During the second quarter of 2020, EQM issued $700 million aggregate principal amount of new 6.00% senior unsecured notes due July 1, 2025 and $900 million aggregate principal amount of new 6.50% senior unsecured notes due July 1, 2027 (collectively, the 2020 Senior Notes) and received net proceeds from the offering of approximately $1,576.1 million, inclusive of a discount of $20.0 million and debt issuance costs of $3.9 million. A portion of the net proceeds were used to repay a portion of the borrowings outstanding under the First Amended EQM Credit Facility, and the remainder was used for general partnership purposes.

The 2020 Senior Notes were issued under and are governed by an indenture, dated June 18, 2020 (the 2020 Indenture), between EQM and The Bank of New York Mellon Trust Company, N.A., as trustee. The 2020 Indenture contains covenants that limit EQM's ability to, among other things, incur certain liens securing indebtedness, engage in certain sale and leaseback

transactions, and enter into certain consolidations, mergers, conveyances, transfers or leases of all or substantially all of EQM's assets. Upon the occurrence of a Change of Control Triggering Event (as defined in the 2020 Indenture), EQM may be required to offer to purchase the 2020 Senior Notes at a purchase price equal to 101% of the aggregate principal amount of the 2020 Senior Notes repurchased, plus accrued and unpaid interest, if any, to, but excluding, the repurchase date.

The 2020 Senior Notes are unsecured and rank equally with all of EQM’s existing and future senior obligations. The 2020 Senior Notes are senior in right of payment to any of EQM’s future obligations that are, by their terms, expressly subordinated in right of payment to the 2020 Senior Notes. The 2020 Senior Notes are effectively subordinated to EQM’s secured obligations, if any, to the extent of the value of the collateral securing such obligations, and structurally subordinated to all indebtedness and obligations, including trade payables, of EQM’s subsidiaries, other than any subsidiaries that may guarantee the 2020 Senior Notes in the future.

The 2020 Indenture contains certain events of default, including the following: (1) default in the payment of interest on such 2020 Senior Notes when due that continues for 30 days; (2) default in the payment of principal of or premium, if any, on any such 2020 Senior Notes when due, whether at its stated maturity, upon redemption or otherwise; (3) failure by EQM or any subsidiary guarantor, if any, to comply for 90 days with the other agreements with respect to such 2020 Senior Notes contained in the 2020 Indenture after written notice by the trustee or by the holders of at least 25% in principal amount of the outstanding 2020 Senior Notes of such series; (4) certain events of bankruptcy, insolvency or reorganization of EQM or any subsidiary guarantor, if any, that is one of EQM’s Significant Subsidiaries (as defined in the 2020 Indenture); and (5) if such 2020 Senior Notes are guaranteed by a subsidiary guarantor that is one of EQM’s Significant Subsidiaries, (a) the guarantee of that subsidiary guarantor ceases to be in full force and effect, except as otherwise provided in the 2020 Indenture; (b) the guarantee of that subsidiary guarantor is declared null and void in a judicial proceeding; or (c) that subsidiary guarantor denies or disaffirms its obligations under the 2020 Indenture or its guarantee.

If an event of default occurs and is continuing with respect to any of the 2020 Senior Notes, the trustee or the holders of at least 25% in aggregate principal amount of the then outstanding 2020 Senior Notes of such series may declare the 2020 Senior Notes of such series to be due and payable. Upon such a declaration, such principal, premium, if any, and accrued and unpaid interest on such 2020 Senior Notes will be due and payable immediately. If an event of default relating to certain events of bankruptcy, insolvency or reorganization occurs, all outstanding 2020 Senior Notes will become due and payable immediately without further action or notice on the part of the trustee or any holders of the 2020 Senior Notes.

As of December 31, 2021, EQM and Eureka were in compliance with all debt provisions and covenants.

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Fair Value Measurements

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Assets Measured at Fair Value on a Recurring Basis. The Company records derivative instruments at fair value on a gross basis in its consolidated balance sheets. The Henry Hub cash bonus payment provision, as described in Note 6, is recorded at its estimated fair value using a Monte Carlo simulation model. Significant inputs used in the fair value measurement include NYMEX Henry Hub natural gas futures prices as of the date of valuation, assumptions regarding in-service timing for the MVP, risk-free interest rates based on U.S. Treasury rates, expected volatility of NYMEX Henry Hub natural gas futures prices and an estimated credit spread of EQT. The expected volatility of NYMEX Henry Hub natural gas futures prices used in the valuation methodology represents a significant unobservable input causing the Henry Hub cash bonus payment provision to be designated as a Level 3 fair value measurement. An expected average volatility of approximately 39% was utilized in the valuation model, which is based on market-quoted volatilities of relevant NYMEX Henry Hub natural gas forward prices. As of December 31, 2021 and 2020, the fair values of the Henry Hub cash bonus payment provision were $51.6 million and $68.0 million, respectively, which were recorded in other assets on the Company's consolidated balance sheets. During the years ended December 31, 2021 and 2020, the Company recognized a loss of $16.4 million and a gain of $16.5 million, respectively, representing the change in estimated fair value of the derivative instrument during the respective period. The (loss) gain is reflected in other (expense) income, net, in the Company's statements of consolidated comprehensive income.

Other Financial Instruments. The carrying values of cash and cash equivalents, accounts receivable, amounts due to/from related parties and accounts payable approximate fair value due to the short maturity of the instruments; as such, their fair values are Level 1 fair value measurements. The carrying values of borrowings under the Amended EQM Credit Facility, the Former Eureka Credit Facility (prior to its termination), the 2021 Eureka Credit Facility and the Amended 2019 EQM Term Loan Agreement (prior to its termination) approximate fair value as the interest rates are based on prevailing market rates; these are considered Level 1 fair value measurements. As EQM's borrowings under its senior notes are not actively traded, their fair values are estimated using an income approach model that applies a discount rate based on prevailing market rates for debt with similar remaining time-to-maturity and credit risk; as such, their fair values are Level 2 fair value measurements. See Note 11 for further information on the fair value of the Company’s outstanding debt. The fair value of the Preferred Interest is a Level 3 fair value measurement and is estimated using an income approach model that applies a market-based discount rate. As of

December 31, 2021 and 2020, the estimated fair values of the Preferred Interest were approximately $117 million and $127 million, respectively, and the carrying values of the Preferred Interest were approximately $100 million and $105 million, respectively.

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(Loss) Earnings Per Share

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

(Loss) Earnings Per Share

(Loss) Earnings Per Share

The following tables set forth the computation of the basic and diluted (loss) earnings per share attributable to Equitrans Midstream common shareholders for the years ended December 31, 2021, 2020 and 2019:

	Year Ended December 31,
	2021				2020				2019
	Basic		Diluted		Basic		Diluted		Basic		Diluted
	(In thousands, except per share data)
Net (loss) income	$	(1,365,948)	(1,365,948)		$	638,044	$	638,044	$	(64,959)	$	(64,959)
Less: Net income attributable to noncontrolling interests (excluding EQM Series A Preferred Units)	14,530		14,530		167,553		167,553		64,803		64,803
Less: EQM Series A Preferred Units interest in net income	—		—		47,359		47,359		73,981		73,981
Less: Preferred dividends	58,512		58,512		58,760		58,760		—		—
Net (loss) income attributable to Equitrans Midstream common shareholders	$	(1,438,990)	$	(1,438,990)	$	364,372	$	364,372	$	(203,743)	$	(203,743)
Basic weighted average common shares outstanding	433,008		433,008		343,935		343,935		254,884		254,884
Dilutive securities (a)	—		—		—		40		—		—
Diluted weighted average common shares outstanding	433,008		433,008		343,935		343,975		254,884		254,884
(Loss) earnings per share of common stock attributable to Equitrans Midstream common shareholders	$	(3.32)	$	(3.32)	$	1.06	$	1.06	$	(0.80)	$	(0.80)

(a) For the year ended December 31, 2021, the Company excluded 30,556 (in thousands) of weighted average anti-dilutive securities related to the Equitrans Midstream Preferred Shares and stock-based compensation awards. For the year ended December 31, 2020, the Company excluded 16,512 (in thousands) of weighted average anti-dilutive securities related to the Equitrans Midstream Preferred Shares and stock-based compensation awards. For the year ended December 31, 2019, the Company excluded 5 (in thousands) of weighted average anti-dilutive securities related to stock-based compensation awards. See Note 10 for information on the Company's stock awards. Additionally, for the applicable periods, EQM's dilutive securities issued and outstanding prior to the EQM Merger did not have a material impact on the Company's diluted earnings per share.

Preferred dividends include a $27.3 million premium recognized on the redemption of the EQM Series A Preferred Units as part of the Restructuring Closing during the year ended December 31, 2020.

The Company grants Equitrans Midstream phantom units to certain non-employee directors that will be paid in Equitrans Midstream common stock upon the director's termination of service on the Board. As there are no remaining service, performance or market conditions related to these awards, 498, 288 and 208 (in thousands) Equitrans Midstream phantom units were included in the computation of basic and diluted weighted average common shares outstanding for the years ended December 31, 2021, 2020 and 2019, respectively. See Note 10 for information on Equitrans Midstream phantom units.

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Income Taxes

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The following table summarizes income tax (benefit) expense for the years ended December 31, 2021, 2020 and 2019.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Current income tax expense:
Federal	$	—	$	—	$	—
State	4,853		2,613		—
Total current income tax expense	4,853		2,613		—
Deferred income tax (benefit) expense:
Federal	(274,857)		81,206		30,975
State	(75,087)		21,512		19,729
Total deferred income tax (benefit) expense	(349,944)		102,718		50,704
Total income tax (benefit) expense	$	(345,091)	$	105,331	$	50,704

The following table summarizes differences between income tax (benefit) expense and amounts computed at the applicable federal statutory rate on pre-tax income for the years ended December 31, 2021, 2020 and 2019.

	Years Ended December 31,
	2021			2020			2019
	(Thousands)
Income tax (benefit) expense at statutory rate	$	(359,318)		$	156,109		$	(2,993)
Valuation allowance	97,634			—			—
State income tax (benefit) expense	(80,277)			19,058			15,587
Noncontrolling interests' share of earnings	(3,051)			(45,132)			(29,145)
Impairment of goodwill	—			—			78,177
AFUDC - equity	(2,595)			(28,346)			(14,127)
Other	2,516			3,642			3,205
Income tax (benefit) expense	$	(345,091)		$	105,331		$	50,704
Effective tax rate	20.2		%	14.2		%	(355.7)		%

For the year ended December 31, 2021, the effective tax rate was lower than the federal and state statutory rates due to valuation allowances that limit tax benefits for the Company's federal and state deferred tax assets. For the year ended December 31, 2021, the effective tax rate was higher than the year ended December 31, 2020 primarily due to the EQM Merger impact on noncontrolling interest and the decrease in MVP Joint Venture AFUDC on the construction of MVP. The effective tax rate was also higher for the year ended December 31, 2021 due to the impairment of equity method investment (see Note 4) and its impact on the loss before income taxes. Noncontrolling interest and AFUDC – equity increase the effective tax rate in periods with a loss before income taxes.

For the year ended December 31, 2020, the effective tax rate was higher than the year ended December 31, 2019 primarily due to the impairment of goodwill (see Note 4) in 2019 and its impact on the loss before income taxes and noncontrolling interest. The effective tax rate was lower for the year ended December 31, 2019 as a result of the portion of goodwill for which there was no tax basis, partially offset by the impact of noncontrolling interest and AFUDC – equity. The net impact of the impairment of goodwill, including its impact to income tax expense at the statutory rate, state income tax expense, noncontrolling interests' share of earnings and impairment of goodwill was a reduction to income tax expense of approximately $43.0 million. The impact of AFUDC – equity increased for the year ended December 31, 2020 compared to prior periods primarily as a result of increases in the Company's pro-rata share of the MVP Joint Venture's AFUDC on the construction of the MVP.

For the years ended December 31, 2020 and 2019, the effective tax rates were lower than the federal and state statutory rates because the Company does not record income tax expense for the applicable periods on the portions of its income attributable to the noncontrolling member of Eureka Midstream and did not record income tax expense on the portion of its income attributable to noncontrolling limited partners of EQM for the periods prior to the closing of the EQM Merger.

The following table summarizes the components of net deferred tax (liabilities) assets.

	December 31,
	2021		2020
	(Thousands)
Deferred income tax assets:
Investment in partnerships	$	67,153	$	—
Net operating loss carryforwards	51,231		54,925
Total deferred tax assets	118,384		54,925
Valuation allowance	(97,634)		—
Net deferred tax asset	20,750		54,925
Deferred income tax liabilities:
Investment in partnerships	—		(379,432)
Deferred revenue	(17,120)		(18,257)
Other	(3,630)		(3,132)
Total deferred income tax liability	(20,750)		(400,821)
Net deferred income tax asset (liability)	$	—	$	(345,896)

As of December 31, 2021, the Company has federal NOL of $34.5 million and state NOL of $16.7 million related to various state jurisdictions with a corresponding full valuation allowance of $34.5 million and $16.7 million, respectively. The Company also has a valuation allowance related to its investment in partnership deferred tax assets, net of offsetting deferred tax liability of $46.4 million. As of December 31, 2020, the Company had federal NOL of $41.4 million and state NOL of $13.5 million related to various state jurisdictions. The federal and commonwealth of Virginia and state of West Virginia NOL carryforwards have no expiration, but utilization is limited to 80% of taxable income in the year of utilization. The Company's Pennsylvania NOL carryforwards expire between 2038 and 2041 and utilization is limited to 40% of taxable income in the year of utilization.

For the year ended December 31, 2021, the Company believes that it is more likely than not that the benefit from its federal and state NOL carryforwards and reversals of the investment in partnership deferred tax asset, net of offsetting deferred tax liabilities, will not be realized. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not (greater than 50%) that a tax benefit will not be realized. In evaluating the need for a valuation allowance, management considers available evidence, both positive and negative, including potential sources of taxable income, income available in carry-back periods, future reversals of taxable temporary differences, projections of taxable income and income from tax planning strategies. Positive evidence includes reversing temporary differences and projection of future profitability within the carry-forward period, including from tax planning strategies. Negative evidence includes historical pre-tax book losses and Pennsylvania NOL expirations. A review of positive and negative evidence regarding these tax benefits resulted in the conclusion that valuation allowances on the Company’s federal and state NOL carryforwards and reversals of the investment in partnership deferred tax asset, net of offsetting deferred tax liabilities, were warranted as it was more likely than not that these assets will not be realized. Any determination to change the valuation allowance would impact the Company's income tax expense in the period in which such a determination is made.

The Company has not identified any uncertain tax positions for the years ended December 31, 2021, 2020 or 2019.

The Company is not subject to federal or state income tax examination by tax authorities for years before 2018.

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Concentrations of Credit Risk

12 Months Ended

Dec. 31, 2021

Risks and Uncertainties [Abstract]

Concentrations of Credit Risk

Concentrations of Credit Risk

The Company is exposed to the credit risk of its customers, including EQT, its largest customer, other producers, natural gas marketers, distribution companies and other end users. For the years ended December 31, 2021, 2020 and 2019, EQT accounted for approximately 59%, 64% and 69%, respectively, of the Company's total revenues across all of the Company's operating segments. As of December 31, 2021, EQT had credit ratings of BB+ from S&P (with a positive outlook), Ba1 from Moody's (with a stable outlook) and BB+ from Fitch (with a stable outlook), each of which were considered non-investment grade. As of December 31, 2020, EQT's credit ratings with each of S&P, Moody's and Fitch were considered non-investment grade.

As of December 31, 2021 and 2020, EQT accounted for 75% and 68%, respectively, of the Company's accounts receivable balances, while various other natural gas marketers and producers accounted for the majority of the remaining accounts receivable balances. To manage the credit risk related to transactions with marketers, the Company engages with only those that

meet specified criteria for credit and liquidity strength and actively monitors accounts with marketers. In connection with its assessment of marketer credit and liquidity strength, the Company may request a letter of credit, guarantee, performance bond or other credit enhancement. The Company did not experience significant defaults on accounts receivable during the years ended December 31, 2021, 2020 and 2019.

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

In the ordinary course of business, various legal and regulatory claims and proceedings are pending or threatened against the Company and its subsidiaries. While the amounts claimed may be substantial, the Company is unable to predict with certainty the ultimate outcome of such claims and proceedings. The Company accrues legal and other direct costs related to loss contingencies when incurred. The Company establishes reserves whenever it believes it to be appropriate for pending matters. Furthermore, after consultation with counsel and considering available insurance, the Company believes that the ultimate outcome of any matter currently pending against it or any of its consolidated subsidiaries will not materially affect its business, financial condition, results of operations, liquidity or ability to pay dividends to its shareholders.

The Company is subject to federal, state and local environmental laws and regulations. These laws and regulations, which are constantly changing, can require expenditures for remediation and, in certain instances, can result in assessment of fines. The Company has established procedures for the ongoing evaluation of its operations to identify potential environmental exposures and to ensure compliance with regulatory requirements. The estimated costs associated with identified situations requiring remedial action are accrued; however, when recoverable through future regulated rates, certain of these costs are deferred as regulatory assets. Ongoing expenditures for compliance with current environmental laws and regulations, including investments in facilities to meet environmental requirements, have not been material. Management believes that required expenditures in respect of such current environmental laws and regulations will not be significantly different in either nature or amount in the future and, based on such current environmental laws and regulations, does not know of any future environmental liabilities that will have a material effect on the Company's business, financial condition, results of operations, liquidity or ability to pay dividends to the Company's shareholders. Nonetheless, the trend in environmental regulation is to place more restrictions and limitations on activities that may affect the environment, and it is generally expected that such trend will likely increase in the future. Thus, compliance with future environmental laws and regulations could result in significant costs and could have a material effect on the Company's business, financial condition, results of operations, liquidity or ability to pay dividends to the Company's shareholders. The Company has identified situations that require remedial action for which approximately $0.2 million, in each case, is included in regulatory and other long-term liabilities in the consolidated balance sheets as of December 31, 2021 and 2020, respectively.

Purchase obligations represent agreements to purchase goods or services that are enforceable, legally binding and specify all significant terms, including the approximate timing of the transaction. As of December 31, 2021, the Company had approximately $3.9 million of purchase obligations, which included commitments for capital expenditures, operating expenses and service contracts.

For information related to operating lease rental payments for office locations and compressors, see Note 7.

See Note 9 for discussion of the MVP Joint Venture guarantees and letters of credit. See Note 6 for a description of the EQT Global GGA.

XML

Summary of Operations and Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Principles of Consolidation

Principles of Consolidation. The consolidated financial statements include the accounts of all entities in which the Company holds a controlling financial interest. For consolidated subsidiaries in which the Company’s ownership is less than 100%, the Company records noncontrolling interest related to the third-party ownership interests in those entities. Investments over which the Company can exert significant influence, but not control, over operating and financial policies are recorded under the equity method of accounting. Intercompany transactions have been eliminated for purposes of preparing these consolidated financial statements. References in these financial statements to Equitrans Midstream or the Company refer collectively to Equitrans Midstream Corporation and, as applicable, its consolidated subsidiaries for all periods presented, unless otherwise indicated.

Segments

Segments. Operating segments are revenue-producing components of the enterprise for which separate financial information is produced internally and is subject to evaluation by the Company's chief operating decision maker in deciding how to allocate resources. The Company reports its operations in three segments that reflect its three lines of business of Gathering, Transmission and Water. The operating segments are evaluated based on their contribution to the Company's operating income and equity income. Transmission also includes the Company's investment in the MVP Joint Venture, which is accounted for as an equity investment as described in Note 9; as a result, Transmission's portion of the MVP Joint Venture's operating results is reflected in equity income and not in Transmission's operating income. All of the Company's operating revenues, income and assets are generated or located in the United States. See Note 5 for financial information by segment.

Reclassification

Reclassification: Certain previously reported amounts have been reclassified to conform to current year presentation.

Use of Estimates

Use of Estimates. The preparation of financial statements in conformity with U.S. Generally Accepted Accounting Principles (GAAP) requires management to make estimates and assumptions that affect amounts reported in these financial statements. Actual results could differ from those estimates.

Cash Equivalents

Cash Equivalents. The Company classifies highly-liquid investments with original maturities of three months or less as cash equivalents. Interest earned on cash equivalents is recorded as a reduction to net interest expense on the statements of consolidated comprehensive income.

Accounts Receivables

Accounts Receivables. Trade and other receivables are stated at their historical carrying amount. Judgment is required to assess the ultimate realization of accounts receivable, including assessing the probability of collection and the creditworthiness of customers.

Derivative Instruments

Derivative Instruments. Derivative instruments are recorded on the Company’s consolidated balance sheets as either an asset or liability measured at fair value.

Fair Value of Financial Instruments

Fair Value of Financial Instruments. Fair value represents the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the reporting date. The Company’s assets and liabilities that are measured at fair value at each reporting date are classified according to a hierarchy that prioritizes inputs and assumptions

underlying the valuation techniques. This fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs and consists of three broad levels:

•Level 1: Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets as of the reporting date.

•Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data. These are inputs other than quoted prices in active markets included in Level 1 that are either directly or indirectly observable as of the reporting date.

•Level 3: Unobservable inputs that are not corroborated by market data and may be used with internally developed methodologies that result in management’s best estimate of fair value.

The Company prioritizes valuation techniques that maximize the use of observable inputs. Assets and liabilities are classified in their entirety based on the lowest priority level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the placement of assets and liabilities within the levels of the fair value hierarchy. Reclassifications of fair value between Level 1, Level 2 and Level 3 of the fair value hierarchy, if applicable, are made at the end of each reporting period. See Note 12 for information regarding the fair value of financial instruments.

Property, Plant and Equipment

Property, Plant and Equipment. The Company's property, plant and equipment are stated at depreciated cost. Maintenance projects that do not increase the overall life of the related assets are expensed as incurred. Expenditures that extend the useful life of the asset are capitalized. The Company capitalized internal labor costs of $50.8 million, $44.9 million and $47.6 million in the years ended December 31, 2021, 2020 and 2019, respectively. The Company capitalized interest, including the debt component of Allowance for Funds Used During Construction (AFUDC), of $4.9 million, $18.6 million and $29.5 million in the years ended December 31, 2021, 2020 and 2019, respectively.

The following table summarizes the Company's property, plant and equipment.

	December 31,
	2021		2020
	(Thousands)
Gathering assets	$	6,911,268	$	6,691,954
Accumulated depreciation	(727,735)		(543,568)
Net gathering assets	6,183,533		6,148,386
Transmission and storage assets	1,901,756		1,877,753
Accumulated depreciation	(424,918)		(370,764)
Net transmission and storage assets	1,476,838		1,506,989
Water services assets	176,245		251,885
Accumulated depreciation	(60,379)		(90,841)
Net water services assets	115,866		161,044
Net other property, plant and equipment	11,266		11,477
Net property, plant and equipment	$	7,787,503	$	7,827,896

Net other property, plant and equipment includes capitalized qualified implementation costs incurred in a hosting arrangement that is a service contract of $10.0 million and $8.8 million, respectively, as of December 31, 2021 and 2020. The Company finalized the implementation of certain portions of its enterprise resource planning system throughout 2021 and 2020 and amortized approximately $0.9 million and $0.5 million of implementation costs in the years ended December 31, 2021 and 2020, respectively.

Depreciation is recorded using composite rates on a straight-line basis over the estimated useful life of the asset. The average depreciation rates for the years ended December 31, 2021, 2020 and 2019 were 2.6%, 2.5% and 2.7%, respectively. The Company estimates that gathering and transmission pipelines have useful lives of 20 years to 50 years and compression equipment has useful lives of 20 years to 50 years. The Company estimates that water pipelines, pumping stations and impoundment facilities have useful lives of 10 years to 15 years. As circumstances warrant, depreciation estimates are reviewed to determine if any changes in the underlying assumptions are necessary. Equitrans, L.P., the Company's FERC-regulated

subsidiary, re-evaluates depreciation rates for its regulated property, plant and equipment each time it files with the FERC for a change in transmission, storage and gathering rates.

Intangible Assets

Intangible Assets. Intangible assets are recorded under the acquisition method of accounting at their estimated fair values at the acquisition date, which are calculated as the present value of estimated future cash flows using a risk-adjusted discount rate. The Company's intangible assets are amortized on a straight-line basis. The estimated annual amortization expense related to the intangible assets for each of the next five years is $64.8 million.

Goodwill and Impairment of Long-Lived Assets

Goodwill and Impairment of Long-Lived Assets. Goodwill is evaluated for impairment at least annually or whenever events or changes in circumstance indicate it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The Company may perform either a qualitative assessment of potential impairment or proceed directly to a quantitative assessment of potential impairment. The Company's qualitative assessment of potential impairment may result in the determination that a quantitative impairment analysis is not necessary. Under this elective process, the Company assesses qualitative factors to determine whether the existence of events or circumstances leads the Company to determine that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then a quantitative assessment is not required. However, if the Company concludes otherwise, a quantitative impairment analysis is performed.

If the Company chooses not to perform a qualitative assessment, or if it chooses to perform a qualitative assessment but is unable to qualitatively conclude that no impairment has occurred, then the Company will perform a quantitative assessment. In the case of a quantitative assessment, the Company estimates the fair value of the reporting unit with which the goodwill is associated and compares it to the carrying value. If the estimated fair value of a reporting unit is less than its carrying value, an impairment charge is recognized for the excess of the reporting unit's carrying value over its fair value. See Note 4 for further detail.

The Company evaluates long-lived assets for impairment when events or changes in circumstances indicate, in management's judgment, that the carrying value of such assets may not be recoverable. With respect to property, plant and equipment and finite lived intangibles, asset recoverability is measured by comparing the carrying value of the asset or asset group with its expected future pre-tax undiscounted cash flows. These cash flow estimates require the Company to make projections and assumptions for many years into the future for pricing, demand, competition, operating costs and other factors. If the carrying amount exceeds the expected future undiscounted cash flows, the Company recognizes an impairment equal to the excess of carrying value over fair value as determined by quoted market prices in active markets or present value techniques if quotes are unavailable. The determination of the fair value using present value techniques requires the Company to make projections and assumptions regarding the probability of a range of outcomes and the rates of interest used in the present value calculations. Any changes the Company makes to these projections and assumptions could result in significant revisions to its evaluations of recoverability and the recognition of additional impairments. See Note 4 for further discussion on impairments of long-lived assets.

Investment in Unconsolidated Entities and Noncontrolling Interests

Investments in Unconsolidated Entities. The Company accounts for the investments in its unconsolidated entities under the equity method. The Company’s pro-rata share of net income in the unconsolidated entities is included in equity income in the Company’s statements of consolidated comprehensive income. Contributions to or distributions from the unconsolidated entities and the Company’s pro-rata share of net income in the unconsolidated entities are recorded as adjustments to the investment balance. The Company reviews the carrying value of its investments in unconsolidated entities for impairment whenever events or changes in circumstances indicate that the fair value may have declined in value. When there is evidence of loss in value that is other-than-temporary, the Company compares the investment's carrying value to its estimated fair value to determine whether impairment has occurred. If the carrying value exceeds the estimated fair value, the Company estimates and recognizes an impairment loss equal to the difference between the investment's carrying value and fair value. See Notes 4 and 9 for further detail.

Noncontrolling Interests. Noncontrolling interests represent the portion of the equity of consolidated entities that are not wholly owned by the Company. Noncontrolling interests are reported as a component of shareholders’ equity in the consolidated balance sheets and are adjusted by the amount of net income earned by the entities with noncontrolling interests, distributions paid to noncontrolling interest holders and any changes in the noncontrolling ownership percentages. As of December 31, 2021 and 2020, the Company's noncontrolling interest consisted of the third-party ownership interest in Eureka Midstream.

For the period prior to the closing of the EQM Merger and for the year ended December 31, 2019, the Company's noncontrolling interests included the EQM common units not held by the Company or its affiliates. For the years ended December 31, 2021 and 2020, and for the period from April 10, 2019 to December 31, 2019, the Company's noncontrolling interests also included third-party ownership interests in Eureka Midstream. For the period from January 1, 2020 through the closing of the EQM Merger and the period April 10, 2019 through December 31, 2019, the Company’s noncontrolling interests also included the EQM Series A Preferred Unitholders' interest in EQM's net income. For the period beginning January 1, 2019 and ending January 10, 2019, the Company's noncontrolling interests included third-party ownership interests in EQGP.

Preferred Interest

Preferred Interest. EQT Energy Supply, LLC (EES), a subsidiary of EQT, generates revenue by providing services to a local distribution company. The preferred interest that the Company has in EES (the Preferred Interest) is accounted for as a note receivable and is presented in other assets in the consolidated balance sheets with the current portion reported in other current assets. Distributions received from EES are recorded as a reduction to the Preferred Interest and as interest income, which is included in net interest expense in the Company's statements of consolidated comprehensive income. The EES operating agreement provides for mandatory redemption of the Preferred Interest at the end of the preference period, which is expected to be December 31, 2034.

Unamortized Debt Discount and Issuance Costs

Unamortized Debt Discount and Issuance Costs. The Company amortizes debt discounts and issuance costs over the term of the related borrowing. Costs incurred from the issuance and/or extension, as applicable, of revolving credit facilities, including borrowings under the Amended EQM Credit Facility and the 2021 Eureka Credit Facility (each as defined in Note 11), are presented in other assets in the consolidated balance sheets. Debt discounts and issuance costs for all other debt instruments are presented as a reduction to debt on the consolidated balance sheets. See Note 11 for further detail.

Leases

Leases. Right-of-use assets represent the right to use the underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. Right-of-use assets and lease liabilities are recognized on the consolidated balance sheets at the lease commencement date based on the present value of lease payments over the lease term. The Company determines if an arrangement is a lease at inception based on whether the Company has the right to control the use of an identified asset, the right to obtain substantially all of the economic benefits from the use of the asset and the right to direct the use of the asset during the lease term and accounts for leases in accordance with ASC 842, Leases (ASC 842).Leases in which the Company is the lessee that do not have a readily determinable implicit rate utilize an incremental borrowing rate, based on the information available at the lease commencement date, to determine the present value of lease payments. When a secured borrowing rate is not readily available, unsecured borrowing rates are adjusted for the effects of collateral to determine the incremental borrowing rate. The Company reassesses the incremental borrowing rate for any new and modified lease contracts as of the contract effective date. Lease expense is recognized on a straight-line basis over the lease term for operating leases.

Asset Retirement Obligations (AROs)

Asset Retirement Obligations (AROs). The Company has AROs related to its water system impoundments and to one of its gathering compressor stations, for which the Company recorded an associated liability and capitalized a corresponding amount to asset retirement costs. The liability relates to the expected future obligation to dismantle, reclaim and dispose of these assets and was estimated using the present value of expected future cash flows, adjusted for inflation and discounted at the Company's credit-adjusted, risk-free rate. The AROs are recorded in regulatory and other long-term liabilities on the consolidated balance sheets. Throughout 2021 and 2020, the Company undertook the reclamation process for certain water system impoundments, which reclamation process was completed as of December 31, 2021.

The following table presents changes in the Company's AROs during 2021 and 2020.

	December 31,
	2021		2020
	(Thousands)
AROs at beginning of period	$	12,172	$	12,301
Liabilities settled	(1,609)		(724)
Revisions to estimated liabilities (a)	—		—
Accretion expense	678		595
AROs at end of period	$	11,241	$	12,172

(a)Revisions to estimated liabilities reflect changes in retirement cost assumptions and to the estimated timing of liability settlement.

The Company is not legally or contractually obligated to restore or dismantle its transmission and storage systems and its gathering systems, other than the one aforementioned gathering compressor station. The Company is legally required to operate and maintain these assets and intends to do so as long as supply and demand for natural gas exists, which the Company expects to continue into the foreseeable future. Therefore, the Company did not have any AROs related to its transmission and storage and gathering (other than the aforementioned gathering compressor station) assets as of December 31, 2021 and 2020.

Contingencies

Contingencies. The Company is involved in various regulatory and legal proceedings that arise in the ordinary course of business. A liability is recorded when the loss is probable and the amount of loss can be reasonably estimated. The Company considers many factors when making such assessments, including historical knowledge and matter specifics. Estimates are developed through consultation with legal counsel and analysis of the potential results. See Note 16.

Regulatory Accounting

Regulatory Accounting. Equitrans, L.P. owns all of the Company's FERC-regulated transmission and storage operations as well as its FERC-regulated low-pressure gathering assets. Therefore, Equitrans, L.P. is subject to FERC regulation. Through the rate-setting process, rate regulation allows Equitrans, L.P. to recover the costs of providing regulated services plus an allowed return on invested capital. Regulatory accounting allows Equitrans, L.P. to defer expenses and income to its consolidated balance sheets as regulatory assets and liabilities when it is probable that those expenses and income will be allowed in the rate-setting process for a period other than the period that they would be reflected in a non-regulated entity's statements of consolidated comprehensive income. Regulatory assets and liabilities are recognized in the Company's statements of consolidated comprehensive income in the period that the underlying expenses and income are reflected in the rates charged to shippers and operators. Equitrans, L.P. expects to continue to be subject to rate regulation that will provide for the recovery of deferred costs.

Revenue Recognition

Revenue Recognition. Revenue is measured based on considerations specific in a contract with a customer. The Company recognizes revenue under gathering, transmission and storage and water services contracts when it satisfies certain performance obligations, as discussed below.

The Company provides gathering, transmission and storage services in two manners: firm service and interruptible service. Firm service is provided under firm contracts, which are contracts for gathering, transmission or storage services that generally obligate the customer to pay a fixed, monthly charge to reserve an agreed upon amount of pipeline or storage capacity regardless of the capacity used by the customer during each month. Volumetric-based fees can also be charged under firm contracts for each firm volume transported, gathered or stored, as well as for volumes transported, gathered or stored in excess of the firm contracted volume, if capacity exists. Interruptible service contracts include volumetric-based fees, which are charges for the volume of gas gathered, transported or stored and generally do not guarantee access to the pipeline or storage facility. Firm and interruptible contracts can be short- or long-term in duration. Firm and interruptible transmission and storage service contracts are billed at the end of each calendar month, with payment typically due within 10 days. Firm and interruptible gathering contracts are billed on a one-month lag, with payment typically due within 21 days. Revenue related to gathering services provided but not yet billed is estimated each month. These estimates are generally based on contract data, preliminary throughput and allocation measurements.

Under a firm contract, the Company has a stand-ready obligation to provide the service over the life of the contract. The performance obligation for firm reservation fee revenue is satisfied over time as the pipeline capacity is made available to the customer. As such, the Company recognizes firm reservation fee revenue evenly over the contract period using a time-elapsed output method to measure progress. The performance obligation for volumetric-based fee revenue is generally satisfied upon the Company's monthly billing to the customer for volumes gathered, transported or stored during the month. The amount billed generally corresponds directly to the value of the Company's performance to date as the customer obtains value as each volume is gathered, transported or stored.

Water service revenues represent fees charged by the Company for the delivery of fresh and produced water to a customer at a specified delivery point and for the collection and recycling or disposal of flowback and produced water. The Company's water service revenues are generated under firm service and interruptible service contracts, which primarily utilize fixed prices per

volume delivered. Firm service provides water services under firm contracts to customers with priority. Interruptible service contracts generally do not guarantee access to the water facilities. For fresh and produced water delivery service contracts, the only performance obligation in each contract is for the Company to provide water (usually a minimum daily volume of water) to the customer at a designated delivery point. For flowback and produced water, the performance obligation is collection and disposal of the water, which typically occur within the same day. Water service contracts are billed on a monthly basis, with payment typically due within 30 days.

For all contracts, the Company allocates the transaction price to each performance obligation based on the estimated relative standalone selling price. When applicable, the excess of consideration received over revenue recognized results in the deferral of those amounts until future periods based on a units of production or straight-line methodology as these methods appropriately match the consumption of services provided to the customer. The units of production methodology requires the use of production estimates that are uncertain and the use of judgment when developing estimates of future production volumes, thus impacting the rate of revenue recognition. Production estimates are monitored as circumstances and events warrant.

Certain of the Company's gas gathering and water services agreements, including the EQT Global GGA, are structured with MVCs, which specify minimum quantities for which a customer will be charged regardless of quantities gathered or delivered under the contract. Revenue is recognized for MVCs when the performance obligation has been met, which is the earlier of when the gas is gathered or water provided, or when it is remote that the producer will be able to meet its MVC. If a customer under such an agreement fails to meet its MVC for a specified period (thus not exercising all the contractual rights to gathering and water services within the specified period, herein referred to as “breakage”), it is obligated to pay a contractually determined fee based upon the shortfall between the actual volumes and the MVC for the period contained in the contract.

AFUDC

AFUDC. The Company capitalizes the carrying costs of financing the construction of certain long-lived, regulated assets. Such costs are amortized over the asset's estimated useful life and include interest costs (the debt component of AFUDC) and equity costs (the equity component of AFUDC). The debt component of AFUDC is recorded as a reduction to net interest expense on the statements of consolidated comprehensive income, and the equity component of AFUDC is recorded in other (expense) income, net, on the statements of consolidated comprehensive income.

Share-Based Compensation

Share-Based Compensation. The Company recognizes share-based compensation expense based upon the estimated fair value of awards over the requisite service period. Time-based restricted units expected to be satisfied in cash are accounted for as liability awards recorded over the requisite service period, typically three years. The fair value of liability awards is remeasured at the end of each reporting period based on the closing price of the Company’s common stock. Time-based restricted stock awards expected to be satisfied in Company common stock are accounted for as equity awards and are recorded over the requisite service period, typically three years, based on the grant date fair value. Director phantom units expected to be satisfied in Company common stock vest on the date of grant and are recorded based on the grant date fair value. The grant date fair value, in both cases, is determined based upon the closing price of the Company's common stock on the day before the grant date. Forfeitures are accounted for as they occur. For plans that include a performance condition that affects the number of awards that will ultimately vest, the probability that the performance condition will be achieved is reevaluated at the end of each reporting period and the payout multiplier is applied to the grant date fair value or measurement date fair value to record compensation expense, as applicable. For plans that include a market condition, compensation expense is based on a grant date fair value using a Monte Carlo simulation that remains constant throughout the vesting period for equity plans and a fair value based on a Monte Carlo simulation remeasured at each reporting period for liability plans. Each plan subject to a market condition is accounted for separately for each vesting tranche of the award.

Income Taxes

Income Taxes. The Company files a consolidated income tax return for federal income taxes and the provision for income taxes is determined using the asset and liability approach of accounting for income taxes. Under this approach, the provision for income taxes represents income taxes paid or payable (or received or receivable) plus the change in deferred taxes for the current year. EQM is a limited partnership for U.S. federal and state income tax purposes. Eureka Midstream is a limited liability company for such purposes. EQM and Eureka Midstream are not subject to U.S. federal or state income taxes.

All of Eureka Midstream's income is, and for the period prior to the closing of the EQM Merger all of EQM's income was, included in the Company's pre-tax income; however, the Company does not record income tax expense on the portions of its income attributable to the noncontrolling member of Eureka Midstream and did not record income tax expense on the portions of its income attributable to the noncontrolling limited partners of EQM for the periods prior to the closing of the EQM Merger. This reduces the Company's effective tax rate in periods when the Company has consolidated pre-tax income and increases the effective tax rate in periods when the Company has consolidated pre-tax loss.

Deferred taxes represent the future tax consequences of differences between the financial and tax bases of the Company's assets and liabilities. Deferred tax balances are adjusted for changes in tax rates and tax laws when enacted. Deferred tax assets are reflected on the consolidated balance sheets for net operating losses, credits or other attributes generated by the Company. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not (greater than 50%) that a tax benefit will not be realized. In evaluating the need for a valuation allowance, management considers all potential sources of taxable income, including income available in carry-back periods, future reversals of taxable temporary differences, projections of taxable income and income from tax planning strategies, as well as all available positive and negative evidence.

Deferred tax assets for which no valuation allowance is recorded may not be realized and changes in facts and circumstances may result in the establishment of a valuation allowance. Existing valuation allowances are re-examined under the same standards of positive and negative evidence that apply to valuation allowance establishment. If it is determined that it is more likely than not that a deferred tax asset for which a valuation is recorded will be realized, all or a portion of the valuation allowance may be released. Deferred tax assets and liabilities are also re-measured to reflect changes in underlying tax rates from tax law changes.

Tax benefits related to uncertain tax positions taken or expected to be taken on a tax return are recorded when such benefits meet a more likely than not threshold; otherwise, the tax benefit is recorded when the tax position has been effectively settled, either because the statute of limitations has expired or the appropriate taxing authority has completed its examination. Interest and penalties related to uncertain tax positions are recognized as part of the provision for income taxes and are accrued in the period that such interest and penalties would be applicable under relevant tax law until such time that the related tax benefits are recognized.

Earnings Per Share (EPS)

Earnings Per Share (EPS). Basic EPS is computed by dividing net (loss) income attributable to Equitrans Midstream common shareholders by the weighted average number of shares of Equitrans Midstream common stock outstanding during the period. Diluted EPS is computed by dividing net (loss) income attributable to Equitrans Midstream by the weighted average number of shares of Equitrans Midstream common stock outstanding and the assumed issuance of all potentially dilutive securities. Each issue of potential common shares is evaluated separately in sequence from the most dilutive to the least dilutive. The dilutive effect of share-based payment awards and stock options is calculated using the treasury stock method, which assumes share purchases are calculated using the average share price of Equitrans Midstream common stock during the applicable period. The Company uses the if-converted method to compute potential common shares from potentially dilutive convertible securities. Under the if-converted method, dilutive convertible securities are assumed to be converted from the date of the issuance and the resulting common shares are included in the denominator of the diluted EPS calculation for the period being presented. Income attributable to preferred dividends on convertible preferred stock that accumulated during the period is added back to the numerator for purposes of the if-converted method. Diluted EPS also takes into consideration the potential dilution from securities issued by subsidiaries that enable their holders to obtain the subsidiary's common stock.

Recently Issued Accounting Standards

Recently Issued Accounting Standards

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848), which provides practical expedients for contract modifications and certain hedging relationships associated with the transition from reference rates that are expected to be discontinued. This guidance is applicable for the Amended EQM Credit Facility and the 2021 Eureka Credit Facility (each as defined in Note 11), as well as for each dividend following March 31, 2024 for the Equitrans Midstream Preferred Shares, which each use the London Inter-Bank Offered Rate (LIBOR) as a reference rate. The ASU was effective immediately but is only available through December 31, 2022. The Company is currently evaluating the potential impact of this standard on its financial statements.

In August 2020, the FASB issued ASU 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the accounting for convertible debt and convertible preferred stock by removing the requirements to separately present certain conversion features in equity. In addition, the amendments in the ASU 2020-06 also simplify the guidance in ASC Subtopic 815-40, Derivatives and Hedging: Contracts in Entity’s Own Equity, by removing certain criteria that must be satisfied in order to classify a contract as equity. Finally, the amendments revise the guidance on calculating earnings per share, requiring use of the if-converted method for all convertible instruments and rescinding an entity’s ability to rebut the presumption of share settlement for instruments that may be settled in cash or other assets. The amendments are effective for fiscal years beginning after December 15, 2021. Adoption of the guidance must commence at the beginning of the annual fiscal year. The Company adopted this standard on January 1, 2022 and it had no impact on the Company's financial statements.

XML

Summary of Operations and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of Property, Plant and Equipments

The following table summarizes the Company's property, plant and equipment.

	December 31,
	2021		2020
	(Thousands)
Gathering assets	$	6,911,268	$	6,691,954
Accumulated depreciation	(727,735)		(543,568)
Net gathering assets	6,183,533		6,148,386
Transmission and storage assets	1,901,756		1,877,753
Accumulated depreciation	(424,918)		(370,764)
Net transmission and storage assets	1,476,838		1,506,989
Water services assets	176,245		251,885
Accumulated depreciation	(60,379)		(90,841)
Net water services assets	115,866		161,044
Net other property, plant and equipment	11,266		11,477
Net property, plant and equipment	$	7,787,503	$	7,827,896

Schedule of Intangible Assets

The following tables summarize the Company's intangible assets as of December 31, 2021 and 2020:

		December 31, 2021
(In thousands)	Useful Life	Gross		Accumulated Amortization(a)		Net
Customer relationships	15 years	$	623,199	$	(171,726)	$	451,473
Eureka Midstream-related customer relationships	10.75 years	237,000		(48,144)		188,856
Hornet Midstream-related customer relationships	7.25 years	74,000		(62,558)		11,442
		$	934,199	$	(282,428)	$	651,771

		December 31, 2020
(In thousands)	Useful Life	Gross		Accumulated Amortization(a)		Net
Customer relationships	15 years	$	623,199	$	(130,180)	$	493,019
Eureka Midstream-related customer relationships	10.75 years	237,000		(27,160)		209,840
Hornet Midstream-related customer relationships	7.25 years	74,000		(60,269)		13,731
		$	934,199	$	(217,609)	$	716,590

(a)Impairment charge of $54.1 million is included within the Hornet Midstream-related customer relationships accumulated amortization. See Note 4 for further information.

Summary of Accrued Liabilities

The following table summarizes the Company's accrued liabilities as of December 31, 2021 and 2020.

	December 31,
	2021		2020
	(Thousands)
Accrued employee compensation	$	50,372	$	46,108
Non-income tax accruals	19,972		19,492
Current portion of operating lease liabilities	8,253		9,990
Other accrued liabilities	5,255		7,776
Total accrued liabilities	$	83,852	$	83,366

Summary of Changes in Asset Retirement Obligations

The following table presents changes in the Company's AROs during 2021 and 2020.

	December 31,
	2021		2020
	(Thousands)
AROs at beginning of period	$	12,172	$	12,301
Liabilities settled	(1,609)		(724)
Revisions to estimated liabilities (a)	—		—
Accretion expense	678		595
AROs at end of period	$	11,241	$	12,172

(a)Revisions to estimated liabilities reflect changes in retirement cost assumptions and to the estimated timing of liability settlement.

Schedule of Regulatory Assets

The following table summarizes Equitrans, L.P.'s regulatory assets and liabilities that are included in other assets and regulatory and other long-term liabilities, respectively, in the Company's consolidated balance sheets.

	December 31,
	2021		2020
	(Thousands)
Regulatory assets:
Deferred taxes (a)	$	91,989	$	89,243
Other recoverable costs (b)	3,654		4,960
Total regulatory assets	$	95,643	$	94,203
Regulatory liabilities:
Deferred taxes (a)	$	9,727	$	10,125
On-going post-retirement benefits other than pension and other reimbursable costs (c)	10,094		10,959
Total regulatory liabilities	$	19,821	$	21,084

(a)The regulatory asset from deferred taxes is primarily related to a historical deferred income tax position and taxes on the equity component of AFUDC. The regulatory liability from deferred taxes relates to the revaluation of a historical difference between the regulatory and tax bases of regulated property, plant and equipment. Equitrans, L.P. expects to recover the amortization of the deferred tax positions ratably over the depreciable lives of the underlying assets. Equitrans, L.P. also expects to recover the taxes on the equity component of AFUDC through future rates over the depreciable lives of the underlying long-lived assets.

(b)The regulatory asset from other recoverable costs is primarily related to the costs associated with the Company's legacy post-retirement benefits plan.

(c)Equitrans, L.P. defers expenses for on-going post-retirement benefits other than pensions, which are subject to recovery in approved rates. The regulatory liability reflects lower cumulative actuarial expenses than the amounts recovered through rates.

Schedule of Regulatory Liabilities

The following table summarizes Equitrans, L.P.'s regulatory assets and liabilities that are included in other assets and regulatory and other long-term liabilities, respectively, in the Company's consolidated balance sheets.

	December 31,
	2021		2020
	(Thousands)
Regulatory assets:
Deferred taxes (a)	$	91,989	$	89,243
Other recoverable costs (b)	3,654		4,960
Total regulatory assets	$	95,643	$	94,203
Regulatory liabilities:
Deferred taxes (a)	$	9,727	$	10,125
On-going post-retirement benefits other than pension and other reimbursable costs (c)	10,094		10,959
Total regulatory liabilities	$	19,821	$	21,084

(a)The regulatory asset from deferred taxes is primarily related to a historical deferred income tax position and taxes on the equity component of AFUDC. The regulatory liability from deferred taxes relates to the revaluation of a historical difference between the regulatory and tax bases of regulated property, plant and equipment. Equitrans, L.P. expects to recover the amortization of the deferred tax positions ratably over the depreciable lives of the underlying assets. Equitrans, L.P. also expects to recover the taxes on the equity component of AFUDC through future rates over the depreciable lives of the underlying long-lived assets.

(b)The regulatory asset from other recoverable costs is primarily related to the costs associated with the Company's legacy post-retirement benefits plan.

(c)Equitrans, L.P. defers expenses for on-going post-retirement benefits other than pensions, which are subject to recovery in approved rates. The regulatory liability reflects lower cumulative actuarial expenses than the amounts recovered through rates.

Schedule of Regulated Operating Revenues, Expenses, Property, Plant and Equipment

The following tables present Equitrans, L.P.'s regulated operating revenues and operating expenses and property, plant and equipment included in the Company's statements of consolidated comprehensive income and consolidated balance sheets, respectively.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Operating revenues	$	403,634	$	397,319	$	396,847
Operating expenses	135,888		124,206		210,861

	December 31,
	2021		2020
	(Thousands)
Property, plant and equipment	$	1,901,924	$	1,878,312
Accumulated depreciation	(424,918)		(370,815)
Net property, plant and equipment	$	1,477,006	$	1,507,497

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Mergers and Acquisitions - (Tables)

12 Months Ended

Dec. 31, 2021

Business Combination and Asset Acquisition [Abstract]

Summary of Preliminary Purchase Price and Allocation of Fair Value of Assets and Liabilities

The following table summarizes the final purchase price and allocation of the fair value of the assets acquired and liabilities assumed in the Bolt-on Acquisition as of April 10, 2019 by the Company, as well as certain measurement period adjustments made subsequent to the Company's initial valuation.

(in thousands)	Preliminary Purchase Price Allocation (As initially reported)		Measurement Period Adjustments (a)		Purchase Price Allocation (As adjusted)
Consideration given:
Cash consideration (b)	$	861,250	$	(11,404)	$	849,846
Buyout of portion of Eureka Midstream Class B units and incentive compensation	2,530		—		2,530
Total consideration	863,780		(11,404)		852,376
Fair value of liabilities assumed:
Current liabilities	52,458		(9,857)		42,601
Long-term debt	300,825		—		300,825
Other long-term liabilities	10,203		—		10,203
Amount attributable to liabilities assumed	363,486		(9,857)		353,629
Fair value of assets acquired:
Cash	15,145		—		15,145
Accounts receivable	16,817		—		16,817
Inventory	12,991		(26)		12,965
Other current assets	882		—		882
Net property, plant and equipment	1,222,284		(8,906)		1,213,378
Intangible assets (c)	317,000		(6,000)		311,000
Deferred tax asset	5,773		(5,268)		505
Other assets	14,567		—		14,567
Amount attributable to assets acquired	1,605,459		(20,200)		1,585,259
Noncontrolling interests	(486,062)		7,602		(478,460)
Goodwill as of April 10, 2019	$	107,869	$	(8,663)	$	99,206
Impairment of goodwill (d)					(99,206)
Goodwill as of December 31, 2019					$	—

(a)    The Company recorded measurement period adjustments to its preliminary acquisition date fair values due to the refinement of its valuation models, assumptions and inputs. The measurement period adjustments were based upon information obtained about facts and circumstances that existed at the acquisition date that, if known, would have affected the measurement of the amounts recognized at that date.

(b)     The cash consideration for the Bolt-on Acquisition was adjusted by approximately $11.4 million related to working capital adjustments and the release of all escrowed indemnification funds to the Company.

(c)    After considering the refinements to the valuation models, the Company estimated the fair value of the customer-related intangible assets acquired as part of the Bolt-on Acquisition to be $311.0 million. As a result, the fair value of the customer-related intangible assets was decreased by $6.0 million on September 30, 2019 with a corresponding increase to goodwill. In addition, the change to the provisional amount resulted in a decrease in amortization expense and accumulated amortization of approximately $0.4 million.

(d)    During the third quarter of 2019, the Company identified impairment indicators that suggested the fair value of its goodwill was more likely than not below its carrying amount. As such, the Company performed an interim goodwill impairment assessment, which resulted in the Company recognizing impairment to goodwill of approximately $268.1 million, of which $99.2 million was associated with its Eureka/Hornet reporting unit, bringing the reporting unit's goodwill balance to zero. See Note 4 for further detail.

Schedule of Post Acquisition Operating Results

Subsequent to the completion of the Bolt-on Acquisition, Eureka Midstream and Hornet Midstream collectively contributed the following to both the Gathering segment and the Company's consolidated operating results for the period from April 10, 2019 through December 31, 2019.

(in thousands)	April 10, 2019 Through December 31, 2019
Operating revenues	$	97,123
Operating loss attributable to Equitrans Midstream	$	(94,551)
Net loss attributable to noncontrolling interests	$	(21,291)
Net loss attributable to Equitrans Midstream	$	(80,631)

Schedule of Unaudited Pro Forma Information

The following unaudited pro forma combined financial information presents the Company's results as though the EQGP Buyout, EQM IDR Transaction and Bolt-on Acquisition had been completed at January 1, 2019. The pro forma combined financial information has been included for comparative purposes and is not necessarily indicative of the results that might have actually occurred had the EQGP Buyout, EQM IDR Transaction and Bolt-on Acquisition taken place on January 1, 2019; furthermore, the financial information is not intended to be a projection of future results.

(in thousands, except per share data)	December 31, 2019
Pro forma operating revenues	$	1,661,822
Pro forma net loss	$	(44,167)
Pro forma net income attributable to noncontrolling interests	$	126,558
Pro forma net loss attributable to Equitrans Midstream	$	(170,725)
Pro forma loss per share (basic)	$	(0.67)
Pro forma loss per share (diluted)	$	(0.67)

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Impairments of Long-Lived Assets (Tables)

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Schedule of Goodwill

The following table summarizes the carrying amount of goodwill associated with the Company's Reporting Units for the years ended December 31, 2021, 2020 and 2019.

	EQM Opco(a)		Rice Retained Midstream		Eureka/Hornet		Total
	(Thousands)
Gross Goodwill	$	1,350,721	$	150,489	$	—	$	1,501,210
Accumulated impairment losses	(261,941)		—		—		(261,941)
Goodwill as of January 1, 2019	1,088,780		150,489		—		1,239,269
Add: goodwill associated with Bolt-on Acquisition	—		—		99,206		99,206
Less: impairment of goodwill	(602,082)		(150,489)		(99,206)		(851,777)
Goodwill as of December 31, 2019	486,698		—		—		486,698
Goodwill as of December 31, 2020	486,698		—		—		486,698
Goodwill as of December 31, 2021	$	486,698	$	—	$	—	$	486,698
Gross Goodwill	$	1,350,721	$	150,489	$	99,206	$	1,600,416
Accumulated impairment losses	(864,023)		(150,489)		(99,206)		(1,113,718)
Goodwill as of December 31, 2021	$	486,698	$	—	$	—	$	486,698

(a) Effective on the EQT Global GGA Effective Date, the RMP PA Gas Gathering reporting unit was merged with and into the EQM Opco reporting unit, with the EQM Opco reporting unit surviving.

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Financial Information by Business Segment (Tables)

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Schedule of Revenue from External Customers and Operating Income and Reconciliation to Net Income

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Revenues from customers:
Gathering	$	862,053	$	1,012,281	$	1,159,931
Transmission	400,202		393,836		390,520
Water	54,782		104,708		79,791
Total operating revenues	$	1,317,037	$	1,510,825	$	1,630,242
Operating income (loss):
Gathering (a)	$	414,200	$	535,976	$	(88,850)
Transmission	274,526		275,369		277,731
Water (b)	(53,980)		38,756		15,305
Headquarters (c)	(1,183)		(25,540)		(128,186)
Total operating income	$	633,563	$	824,561	$	76,000
Reconciliation of operating income to net (loss) income:
Equity income (d)	$	17,579	$	233,833	$	163,279
Impairment of equity method investment (d)	(1,926,402)		—		—
Other (expense) income, net (e)	(16,104)		17,225		2,661
Loss on extinguishment of debt	(41,025)		(24,864)		—
Net interest expense	(378,650)		(307,380)		(256,195)
Income tax (benefit) expense	(345,091)		105,331		50,704
Net (loss) income	$	(1,365,948)	$	638,044	$	(64,959)

(a)Impairments of long-lived assets of $55.6 million and $854.3 million for the years ended December 31, 2020 and 2019, respectively, were included in Gathering operating income (loss). See Note 4 for further information.

(b)Impairments of long-lived assets of $56.2 million for the year ended December 31, 2021 was included in Water operating income (loss). See Note 4 for further information.

(c)Includes separation and other transaction costs and other unallocated corporate expenses.

(d)Equity income and impairment of equity method investment are included in the Transmission segment.

(e)Includes unrealized (loss) gain on derivative instruments recorded in the Gathering segment.

Schedule of Segment Assets

	December 31,
	2021		2020		2019
	(Thousands)
Segment assets:
Gathering	$	7,638,877	$	7,739,836	$	7,572,911
Transmission (a)	2,769,097		4,357,382		3,903,707
Water	151,151		185,802		202,440
Total operating segments	10,559,125		12,283,020		11,679,058
Headquarters, including cash	361,639		442,832		362,651
Total assets	$	10,920,764	$	12,725,852	$	12,041,709

(a)The equity investment in the MVP Joint Venture is included in the Transmission segment.

Schedule of Depreciation and Amortization and Expenditures for Segment Assets

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Depreciation:
Gathering	$	188,633	$	172,967	$	144,310
Transmission	55,310		54,540		51,935
Water	25,233		30,880		26,915
Headquarters	1,228		1,226		4,204
Total	$	270,404	$	259,613	$	227,364
Expenditures for segment assets:
Gathering (a)	$	223,807	$	344,873	$	834,712
Transmission (b)	25,977		45,219		59,313
Water	34,877		11,905		37,457
Headquarters	1,494		4,004		9,779
Total (c)	$	286,155	$	406,001	$	941,261

(a)Includes approximately $14.1 million, $41.6 million and $25.9 million of capital expenditures related to noncontrolling interests in Eureka Midstream for the years ended December 31, 2021, 2020 and 2019, respectively.

(b)Transmission capital expenditures do not include capital contributions made to the MVP Joint Venture for the MVP and MVP Southgate projects of approximately $287.7 million, $272.8 million and $774.6 million for the years ended December 31, 2021, 2020 and 2019, respectively.

(c)The Company accrues capital expenditures when the work has been completed but the associated bills have not yet been paid. Accrued capital expenditures are excluded from the statements of consolidated cash flows until they are paid. The net impact of non-cash capital expenditures, including the effect of accrued capital expenditures, assumed capital expenditures associated with the Bolt-on Acquisition, transfers to/from inventory as assets are completed/assigned to a project and capitalized share-based compensation costs, was $4.4 million, $56.0 million and $26.1 million at December 31, 2021, 2020 and 2019, respectively.

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Revenue from Contracts with Customers (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregated Revenue Information, by Business Segment

The tables below provide disaggregated revenue information by business segment.

	Year Ended December 31, 2021
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	468,156	$	366,323	$	5,063	$	839,542
Volumetric-based fee revenues	393,897		33,879		49,719		477,495
Total operating revenues	$	862,053	$	400,202	$	54,782	$	1,317,037

	Year Ended December 31, 2020
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	595,720	$	364,533	$	41,798	$	1,002,051
Volumetric-based fee revenues	416,561		29,303		62,910		508,774
Total operating revenues	$	1,012,281	$	393,836	$	104,708	$	1,510,825

	Year Ended December 31, 2019
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	581,118	$	356,569	$	11,190	$	948,877
Volumetric-based fee revenues	578,813		33,951		68,601		681,365
Total operating revenues	$	1,159,931	$	390,520	$	79,791	$	1,630,242

(a)    For the years ended December 31, 2021 and 2020, firm reservation fee revenues associated with Gathering included approximately $11.3 million and $15.0 million, respectively, of MVC unbilled revenues. There were no MVC unbilled revenues associated with Gathering during the year ended December 31, 2019.

Schedule of Receivables

The following table presents changes in the Company's unbilled revenue balance during the years ended December 31, 2021 and 2020:

	Unbilled Revenue
	2021		2020
	(Thousands)
Balance as of beginning of period	$	18,618	$	—
Revenue recognized in excess of amounts invoiced (a)	26,779		28,446
Minimum volume commitments invoiced (b)	(28,442)		(9,828)
Amortization (c)	(183)		—
Balance as of end of period	$	16,772	$	18,618

(a) Primarily includes revenues associated with MVCs that are generally included in firm reservation fee revenues within the Gathering and Water segments. During the year ended December 31, 2021, also includes other contractual commitments of approximately $6.4 million.

(b) Unbilled revenues are transferred to accounts receivable once the Company has an unconditional right to consideration from the customer.

(c) Amortization of capitalized contract costs paid to customers over the expected life of the agreement.

The following table presents changes in the Company's contract liability balances during the years ended December 31, 2021 and 2020:

	Contract Liability
	2021		2020
	(Thousands)
Balance as of beginning of period	$	398,750	$	—
Amounts recorded during the period (a)	300,496		398,750
Change in estimated variable consideration (b)	123,707		—
Amounts transferred during the period (c)	(537)		—
Balance as of end of period	$	822,416	$	398,750

(a) Includes deferred billed revenue during the years ended December 31, 2021 and 2020 primarily associated with the EQT Global GGA.

(b) Change in estimated variable consideration represents the increase in total deferred revenue required for gathering MVC revenue with a declining rate structure, resulting from contractual amendments that required total estimated gathering consideration to be reduced. See 'EQT Global GGA' discussion below for additional information on the contractual amendments.

(c)    Deferred revenues are recognized as revenue upon satisfaction of the Company's performance obligation to the customer.

Summary of Remaining Performance Obligations

The following table summarizes the estimated transaction price allocated to the Company's remaining performance obligations under all contracts with firm reservation fees and MVCs as of December 31, 2021 that the Company will invoice or transfer from contract liabilities and recognize in future periods.

	2022		2023		2024		2025		2026		Thereafter		Total
	(Thousands)
Gathering firm reservation fees	$	88,587	$	105,667	$	157,484	$	149,923	$	141,091	$	1,277,200	$	1,919,952
Gathering revenues supported by MVCs	441,202		454,236		426,929		445,958		457,120		3,462,805		5,688,250
Transmission firm reservation fees	362,096		358,222		375,984		362,814		357,910		3,222,117		5,039,143
Water revenues supported by MVCs	33,313		37,500		37,500		37,500		37,500		193,750		377,063
Total (a)	$	925,198	$	955,625	$	997,897	$	996,195	$	993,621	$	8,155,872	$	13,024,408

(a) Includes assumptions regarding timing for placing certain projects in-service. Such assumptions may not be realized and delays in the in-service dates for projects have substantially altered, and additional delays may further substantially alter, the remaining performance obligations for certain contracts with firm reservation fees and/or MVCs. The MVP Joint Venture is accounted for as an equity investment and those amounts are not included in the table above.

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Leases (Tables)

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Schedule of Operating Lease Cost

The following table summarizes lease cost for the years ended December 31, 2021, 2020 and 2019:

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Operating lease cost	$	12,571	$	14,464	$	12,858
Short-term lease cost	6,057		5,075		4,642
Variable lease cost	7		168		321
Sublease income	(492)		(583)		(445)
Total lease cost	$	18,143	$	19,124	$	17,376

Schedule of Operating Lease Liability Maturities

The following table summarizes undiscounted cash flows owed by the Company to lessors pursuant to noncancelable contractual agreements in effect as of December 31, 2021 and related imputed interest.

	December 31, 2021
	(Thousands)
2022	$	10,404
2023	8,065
2024	6,190
2025	4,970
2026	5,040
Thereafter	20,652
Total	55,321
Less: imputed interest	10,911
Present value of operating lease liability	$	44,410

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Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2021

Related Party Transactions [Abstract]

Schedule of Related Party Transactions

The following table summarizes the Company's related party transactions.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Operating revenues	$	777,276	$	964,220	$	1,122,626
Separation and other transaction costs	—		—		(1,440)
Equity income (a)	17,579		233,833		163,279
Interest income from the Preferred Interest	5,767		6,053		6,324
Capital contributions to the MVP Joint Venture (a)	(287,665)		(272,801)		(774,593)
Principal payments received on the Preferred Interest	5,217		5,003		4,661
Net distributions to EQT	—		—		(93,666)

(a)Associated with the Company's ownership in the MVP Joint Venture. See Note 9 for further detail.

The following table summarizes the Company's related party receivables and payables.

	December 31,
	2021		2020
	(Thousands)
Accounts receivable	$	190,410	$	199,674
Contract asset	2,246		2,207
Investments in unconsolidated entity	1,239,039		2,796,316
Preferred Interest	99,838		105,056
Capital contributions payable to the MVP Joint Venture	72,188		10,723
Contract liability	818,658		398,750

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Investment in Unconsolidated Entity (Tables)

12 Months Ended

Dec. 31, 2021

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Unaudited Condensed Financial Statements for the Investment in Unconsolidated Equity

The following tables summarize the condensed consolidated financial statements of the MVP Joint Venture in relation to the MVP project.

Condensed Consolidated Balance Sheets

	December 31,
	2021		2020
	(Unaudited)
	(Thousands)
Current assets	$	148,820	$	146,054
Non-current assets	6,432,288		5,848,298
Total assets	$	6,581,108	$	5,994,352
Current liabilities	$	160,331	$	217,086
Equity	6,420,777		5,777,266
Total liabilities and equity	$	6,581,108	$	5,994,352

Condensed Statements of Consolidated Operations

	Years Ended December 31,
	2021		2020		2019
	(Unaudited)
	(Thousands)
Operating expenses	$	(399)	$	(360)	$	(2,416)
Other income	18		288		6,243
Net interest income	11,452		150,995		105,382
AFUDC – equity	26,722		352,323		245,890
Net income	$	37,793	$	503,246	$	355,099

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Share-based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Share-based Compensation Expense

The following table summarizes the components of share-based compensation expense for the years ended December 31, 2021, 2020 and 2019.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
2017 Incentive PSU Program	—		—		(893)
2018 Incentive PSU Program	—		698		(360)
2019 Equitrans Midstream PSU Program	984		4,935		—
2020 Equitrans Midstream PSU Program	1,297		2,317		—
2021 Equitrans Midstream PSU Program	5,940		—		—
2018 EQT Value Driver Performance Share Unit Award Program	—		—		637
Restricted stock awards	11,268		7,422		5,197
Other programs, including non-employee director awards	3,205		1,577		1,833
Total share-based compensation expense	$	22,694	$	16,949	$	6,414

Schedule of Details of Award Types

The following table provides detailed information on each award:

Incentive PSU Program	Settled In	Accounting Treatment	Fair Value (a)		Vested/ Payment Date	Awards Paid	Value (Millions)		Unvested/ Expected Payment Date	Awards Outstanding as of December 31, 2021 (b)
2017	Stock	Equity	$	120.60	February 2020	66,822	$	8.1	N/A	N/A
2017	Cash	Liability	$	13.36	February 2020	146,387	2.0		N/A	N/A
2018	Stock	Equity	$	76.53	February 2021	40,349	3.1		N/A	N/A
2018T1	Cash	Liability	$	8.04	February 2021	40,769	0.3		N/A	N/A
2018T2	Cash	Liability	$	—	February 2021	—	—		N/A	N/A
2019	Stock	Equity	$	15.03	N/A	N/A	N/A		First Quarter of 2022	474,488
2019	Cash	Liability	$	—	N/A	N/A	N/A		First Quarter of 2022	209,525
2020	Stock	Equity	$	5.59	N/A	N/A	N/A		First Quarter of 2023	703,583
2020	Cash	Liability	$	7.19	N/A	N/A	N/A		First Quarter of 2023	406,050
2021	Stock	Equity	$	8.77	N/A	N/A	N/A		First Quarter of 2024	1,481,126
2021	Cash	Liability	$	13.73	N/A	N/A	N/A		First Quarter of 2024	856,190

(a)Grant date fair value was determined using a Monte Carlo simulation for equity awards. For unvested liability awards, the fair value was determined using a Monte Carlo simulation as of the measurement date. For vested liability awards, the fair value is equal to the Company’s stock price at the end of the performance period.

(b)Represents the number of outstanding units as of December 31, 2021, adjusted for forfeitures, to be settled in stock or cash.

The following table provides detailed information on the 2018 EQT VDA award:

EQT VDA Program	Settled In	Accounting Treatment	Fair Value per Unit (a)		Vested/ Payment Date	Cash Paid (Millions)		Unvested/ Expected Payment Date	Awards Outstanding as of December 31, 2021
2018	Cash	Liability	$	20.02	February 2019	$	4.1	N/A	N/A
2018	Cash	Liability	$	13.36	February 2020	$	2.3	N/A	N/A

(a)The fair value per unit is based on the Company's common stock price on the measurement date.

A summary of phantom units' activity for the years ended December 31, 2021, 2020 and 2019 is presented below.

	Years Ended December 31,
	2021					2020					2019
	Grants	Weighted Average Fair Value		Compensation Expense (Millions)		Grants	Weighted Average Fair Value		Compensation Expense (Millions)		Grants	Weighted Average Fair Value		Compensation Expense (Millions)
Equitrans Midstream phantom units	149,280	$	8.04	$	1.2	92,760	$	11.51	$	1.1	45,000	$	20.02	$	0.9
EQGP phantom units (a)	—	$	—	$	—	—	$	—	$	—	8,500	$	20.00	$	0.2
EQM phantom units(b)	—	$	—	$	—	9,540	$	29.91	$	0.3	5,910	$	43.25	$	0.3

(a)In connection with the completion of the EQGP Buyout, the non-employee directors of EQGP's general partner were paid the Purchase Price for each EQGP phantom unit that they held. See Note 2.

(b)In connection with the closing of the EQM Merger, the non-employee directors of the EQM General Partner received the Merger Consideration for each EQM phantom unit that they held. See Note 2.

Non-Qualified Stock Options, Assumptions Used to Value Share-based Compensation

Fair value is estimated using a Monte Carlo simulation valuation method with the following weighted average assumptions:

	For Incentive PSU Programs Issued During the Years Ended December 31,
	2021				2020				2019
Accounting Treatment	Liability (a)		Equity		Liability (a)		Equity			Equity
Risk-free rate	0.67	%	0.16	%	0.28	%	0.39	%		2.54	%
Dividend yield	N/A		N/A		N/A		N/A			N/A
Volatility factor	61.0	%	61.0	%	42.0	%	53.0	%		30.0	%
Expected term	2 years		3 years		1 year		3 years			3 years

(a)Information shown for the valuation of the liability plan is as of the measurement date.

Schedule of Restricted Stock Awards Activity

A summary of restricted stock equity award activity during the year ended December 31, 2021 is presented below.

	Non-vested Shares (a)	Weighted Average Fair Value		Aggregate Grant Date Fair Value
Outstanding at January 1, 2021	841,068	$	17.08	$	14,366,346
Granted	660,250	8.04		5,308,410
Vested	(58,185)	44.20		(2,572,026)
Forfeited	(49,732)	11.17		(555,522)
Outstanding at December 31, 2021	1,393,401	$	11.88	$	16,547,208

(a)Non-vested shares outstanding at December 31, 2021 will be settled by the Company once vested, assuming continued service through such date.

A summary of restricted stock unit liability award activity during the year ended December 31, 2021 is presented below.

	Non-vested Shares (a)	Weighted Average Fair Value		Aggregate Grant Date Fair Value
Outstanding at January 1, 2021	877,596	$	15.46	$	13,565,895
Granted	430,800	8.06		3,472,652
Vested	(190,036)	20.76		(3,944,942)
Forfeited	(38,656)	10.73		(414,837)
Outstanding at December 31, 2021	1,079,704	$	11.74	$	12,678,768

(a)Non-vested shares outstanding at December 31, 2021 will be settled by the Company once vested, assuming continued service through such date.

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Debt (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Schedule of Outstanding Debt

The following table presents the Company's and its consolidated subsidiaries' outstanding debt as of December 31, 2021 and 2020.

	December 31, 2021						December 31, 2020
	Principal		Carrying Value(a)		Fair Value(b)		Principal		Carrying Value(a)		Fair Value(b)
	(Thousands)
Amended EQM Credit Facility	$	225,000	$	225,000	$	225,000	$	485,000	$	485,000	$	485,000
Eureka Credit Facility (c)	280,000		280,000		280,000		302,500		302,500		302,500
Total credit facility borrowings	$	505,000	$	505,000	$	505,000	$	787,500	$	787,500	$	787,500
Amended 2019 EQM Term Loan Agreement	—		—		—		1,400,000		1,397,768		1,400,000
EQM 4.00% Senior Notes due 2024	500,000		498,014		522,695		500,000		497,245		515,455
EQM 4.125% Senior Notes due 2026	500,000		495,816		517,695		500,000		494,966		512,285
EQM 4.50% Senior Notes due 2029	800,000		790,927		834,856		—		—		—
EQM 4.75% Senior Notes due 2023	600,000		598,088		628,380		1,100,000		1,094,235		1,162,590
EQM 4.75% Senior Notes due 2031	1,100,000		1,087,493		1,166,220		—		—		—
EQM 5.50% Senior Notes due 2028	850,000		842,657		939,684		850,000		841,538		933,980
EQM 6.50% Senior Notes due 2048	550,000		539,778		673,458		550,000		539,393		582,995
EQM 6.00% Senior Notes due 2025	700,000		692,662		763,091		700,000		690,565		767,375
EQM 6.50% Senior Notes due 2027	900,000		889,510		1,014,417		900,000		887,602		1,020,060
Total long-term debt	$	6,500,000	$	6,434,945	$	7,060,496	$	6,500,000	$	6,443,312	$	6,894,740

(a)Carrying values of the senior notes and term loans represent principal amount less unamortized debt issuance costs and debt discounts.

(b)See Note 12 for a discussion of fair value measurements.

(c)Includes aggregate borrowings outstanding on the 2021 Eureka Credit Facility (as defined below) as of December 31, 2021 and on the Former Eureka Credit Facility (as defined below) as of December 30, 2020.

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(Loss) Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following tables set forth the computation of the basic and diluted (loss) earnings per share attributable to Equitrans Midstream common shareholders for the years ended December 31, 2021, 2020 and 2019:

	Year Ended December 31,
	2021				2020				2019
	Basic		Diluted		Basic		Diluted		Basic		Diluted
	(In thousands, except per share data)
Net (loss) income	$	(1,365,948)	(1,365,948)		$	638,044	$	638,044	$	(64,959)	$	(64,959)
Less: Net income attributable to noncontrolling interests (excluding EQM Series A Preferred Units)	14,530		14,530		167,553		167,553		64,803		64,803
Less: EQM Series A Preferred Units interest in net income	—		—		47,359		47,359		73,981		73,981
Less: Preferred dividends	58,512		58,512		58,760		58,760		—		—
Net (loss) income attributable to Equitrans Midstream common shareholders	$	(1,438,990)	$	(1,438,990)	$	364,372	$	364,372	$	(203,743)	$	(203,743)
Basic weighted average common shares outstanding	433,008		433,008		343,935		343,935		254,884		254,884
Dilutive securities (a)	—		—		—		40		—		—
Diluted weighted average common shares outstanding	433,008		433,008		343,935		343,975		254,884		254,884
(Loss) earnings per share of common stock attributable to Equitrans Midstream common shareholders	$	(3.32)	$	(3.32)	$	1.06	$	1.06	$	(0.80)	$	(0.80)

(a) For the year ended December 31, 2021, the Company excluded 30,556 (in thousands) of weighted average anti-dilutive securities related to the Equitrans Midstream Preferred Shares and stock-based compensation awards. For the year ended December 31, 2020, the Company excluded 16,512 (in thousands) of weighted average anti-dilutive securities related to the Equitrans Midstream Preferred Shares and stock-based compensation awards. For the year ended December 31, 2019, the Company excluded 5 (in thousands) of weighted average anti-dilutive securities related to stock-based compensation awards. See Note 10 for information on the Company's stock awards. Additionally, for the applicable periods, EQM's dilutive securities issued and outstanding prior to the EQM Merger did not have a material impact on the Company's diluted earnings per share.

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Summary of Income Tax Expense

The following table summarizes income tax (benefit) expense for the years ended December 31, 2021, 2020 and 2019.

	Years Ended December 31,
	2021		2020		2019
	(Thousands)
Current income tax expense:
Federal	$	—	$	—	$	—
State	4,853		2,613		—
Total current income tax expense	4,853		2,613		—
Deferred income tax (benefit) expense:
Federal	(274,857)		81,206		30,975
State	(75,087)		21,512		19,729
Total deferred income tax (benefit) expense	(349,944)		102,718		50,704
Total income tax (benefit) expense	$	(345,091)	$	105,331	$	50,704

Schedule of Income Tax Expense Reconciliation

The following table summarizes differences between income tax (benefit) expense and amounts computed at the applicable federal statutory rate on pre-tax income for the years ended December 31, 2021, 2020 and 2019.

	Years Ended December 31,
	2021			2020			2019
	(Thousands)
Income tax (benefit) expense at statutory rate	$	(359,318)		$	156,109		$	(2,993)
Valuation allowance	97,634			—			—
State income tax (benefit) expense	(80,277)			19,058			15,587
Noncontrolling interests' share of earnings	(3,051)			(45,132)			(29,145)
Impairment of goodwill	—			—			78,177
AFUDC - equity	(2,595)			(28,346)			(14,127)
Other	2,516			3,642			3,205
Income tax (benefit) expense	$	(345,091)		$	105,331		$	50,704
Effective tax rate	20.2		%	14.2		%	(355.7)		%

Schedule of Components of Net Deferred Tax Assets and Liabilities

The following table summarizes the components of net deferred tax (liabilities) assets.

	December 31,
	2021		2020
	(Thousands)
Deferred income tax assets:
Investment in partnerships	$	67,153	$	—
Net operating loss carryforwards	51,231		54,925
Total deferred tax assets	118,384		54,925
Valuation allowance	(97,634)		—
Net deferred tax asset	20,750		54,925
Deferred income tax liabilities:
Investment in partnerships	—		(379,432)
Deferred revenue	(17,120)		(18,257)
Other	(3,630)		(3,132)
Total deferred income tax liability	(20,750)		(400,821)
Net deferred income tax asset (liability)	$	—	$	(345,896)

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Summary of Operations and Significant Accounting Policies - Organization Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands					12 Months Ended
	Jun. 17, 2020	Feb. 26, 2020	Mar. 13, 2019	Nov. 12, 2018	Dec. 31, 2020	Jun. 18, 2020
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percent of cash distributions paid				80.10%
Principal amount redeemed					$ 679,681
Sale of units, convertible common stock, conversion basis			100.00%
EQM Merger | Series A Preferred Units
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Principal amount redeemed	$ 600,000	$ 600,000
Redemption rate	101.00%					101.00%
Unit purchase price (in dollars per share)		$ 48.77	$ 48.77
EQM Merger | Preferred Stock
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Redemption rate	244.00%
Equity instrument redemption (in shares)	2.44					2.44
Equitrans Midstream | EQT Corporation
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Limited partner ownership interest				19.90%

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Summary of Operations and Significant Accounting Policies - Nature of Business Narrative (Details)	Dec. 31, 2021 MMcf / d Bcf / d interstatePipeline compressorUnit primaryAsset gasReserve facility mi hp Bcf
Public Utilities, General Disclosures [Line Items]
Number of primary assets through which services are provided | primaryAsset	3
Length of water pipeline	200
Number of fresh water impoundment facilities | facility	23
PENNSYLVANIA
Public Utilities, General Disclosures [Line Items]
Length of water pipeline	8
Gathering assets
Public Utilities, General Disclosures [Line Items]
Length of pipeline	1,170
Daily capacity (in Bcf per day) | Bcf / d	7.0
Number of compressor units | compressorUnit	133
Compression capacity (in hp) | hp	491,000
High Pressure Header Pipelines Member
Public Utilities, General Disclosures [Line Items]
Daily capacity (in Bcf per day) | Bcf / d	1.8
Transmission and storage assets
Public Utilities, General Disclosures [Line Items]
Daily capacity (in Bcf per day) | Bcf / d	4.4
Number of compressor units | compressorUnit	43
Compression capacity (in hp) | hp	136,000
Length of FERC-regulated lines (in miles)	950
Number of connection points | interstatePipeline	7
Number of gas reservoirs | gasReserve	18
Peak withdrawal capacity (in Bcf per day) | MMcf / d	850
Working gas capacity (in Bcf) | Bcf	43

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Summary of Operations and Significant Accounting Policies - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) segment lineOfBusiness	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of business segments | segment	3
Number of lines of business | lineOfBusiness	3
Property, plant and equipment, cost capitalization	$ 50.8	$ 44.9	$ 47.6
Property, plant and equipment, interest capitalization	4.9	18.6	$ 29.5
Implementation costs incurred in hosting arrangement	10.0	8.8
Implementation costs amortized	$ 0.9	$ 0.5
Property, plant and equipment, depreciation rates	2.60%	2.50%	2.70%
Gas imbalance receivable	$ 1.9	$ 1.8
Contract billing cycle	10 days
Restricted stock awards
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Period after which the shares granted will be fully vested	3 years
Restricted Stock Units, Liability
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Period after which the shares granted will be fully vested	3 years
Water
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract billing cycle	30 days
Gathering
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract billing cycle	21 days
Eureka Midstream Holdings, LLC
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-lived intangible assets, amortization expense, next five years	$ 64.8
Interest Expense
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AFUDC, debt component	0.2	0.3	$ 1.4
Nonoperating Income (Expense)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AFUDC, equity component	$ 0.3	$ 0.8	$ 5.7
Minimum | Gathering assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, estimated useful lives	20 years
Minimum | Transmission and storage assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, estimated useful lives	20 years
Minimum | Water services assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, estimated useful lives	10 years
Maximum | Gathering assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, estimated useful lives	50 years
Maximum | Transmission and storage assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, estimated useful lives	50 years
Maximum | Water services assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, estimated useful lives	15 years

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Summary of Operations and Significant Accounting Policies - Property Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Public Utility, Property, Plant and Equipment [Line Items]
Net property, plant and equipment	$ 7,787,503	$ 7,827,896
Gathering assets
Public Utility, Property, Plant and Equipment [Line Items]
Assets	6,911,268	6,691,954
Accumulated depreciation	(727,735)	(543,568)
Net property, plant and equipment	6,183,533	6,148,386
Transmission and storage assets
Public Utility, Property, Plant and Equipment [Line Items]
Assets	1,901,756	1,877,753
Accumulated depreciation	(424,918)	(370,764)
Net property, plant and equipment	1,476,838	1,506,989
Water services assets
Public Utility, Property, Plant and Equipment [Line Items]
Assets	176,245	251,885
Accumulated depreciation	(60,379)	(90,841)
Net property, plant and equipment	115,866	161,044
Other property, plant and equipment
Public Utility, Property, Plant and Equipment [Line Items]
Net property, plant and equipment	$ 11,266	$ 11,477

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Summary of Operations and Significant Accounting Policies - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross	$ 934,199	$ 934,199
Accumulated Amortization	(282,428)	(217,609)
Net	651,771	$ 716,590
Impairment of Hornet Midstream -related intangible assets	$ 54,100
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Useful Life	15 years	15 years
Gross	$ 623,199	$ 623,199
Accumulated Amortization	(171,726)	(130,180)
Net	$ 451,473	$ 493,019
Customer Relationships | Eureka Midstream Holdings, LLC
Finite-Lived Intangible Assets [Line Items]
Useful Life	10 years 9 months	10 years 9 months
Gross	$ 237,000	$ 237,000
Accumulated Amortization	(48,144)	(27,160)
Net	$ 188,856	$ 209,840
Customer Relationships | Hornet Midstream Holdings, LLC
Finite-Lived Intangible Assets [Line Items]
Useful Life	7 years 3 months	7 years 3 months
Gross	$ 74,000	$ 74,000
Accumulated Amortization	(62,558)	(60,269)
Net	$ 11,442	$ 13,731

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Summary of Operations and Significant Accounting Policies - Summary of Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Accrued employee compensation	$ 50,372	$ 46,108
Non-income tax accruals	19,972	19,492
Current portion of operating lease liabilities	8,253	9,990
Other accrued liabilities	5,255	7,776
Total accrued liabilities	$ 83,852	$ 83,366

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Summary of Operations and Significant Accounting Policies - Asset Retirement Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
AROs at beginning of period	$ 12,172	$ 12,301
Liabilities settled	(1,609)	(724)
Revisions to estimated liabilities	0	0
Accretion expense	678	595
AROs at end of period	$ 11,241	$ 12,172

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Summary of Operations and Significant Accounting Policies - Regulatory Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Regulatory Assets [Line Items]
Total regulatory assets	$ 95,643	$ 94,203
Regulatory Liabilities [Line Items]
Total regulatory liabilities	19,821	21,084
Deferred taxes
Regulatory Liabilities [Line Items]
Total regulatory liabilities	9,727	10,125
On-going post-retirement benefits other than pension
Regulatory Liabilities [Line Items]
Total regulatory liabilities	10,094	10,959
Deferred taxes
Regulatory Assets [Line Items]
Total regulatory assets	91,989	89,243
Other recoverable costs
Regulatory Assets [Line Items]
Total regulatory assets	$ 3,654	$ 4,960

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Summary of Operations and Significant Accounting Policies - Regulatory Operations and Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement Related Disclosures [Abstract]
Operating revenues	$ 403,634	$ 397,319	$ 396,847
Operating expenses	135,888	124,206	$ 210,861
Public Utility, Property, Plant and Equipment [Line Items]
Net property, plant and equipment	7,787,503	7,827,896
Regulated Operation
Public Utility, Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,901,924	1,878,312
Accumulated depreciation	(424,918)	(370,815)
Net property, plant and equipment	$ 1,477,006	$ 1,507,497

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Investments in Consolidated, Non-Wholly-Owned Entities - Investment in EQM (Details) $ / shares in Units, $ in Thousands								12 Months Ended
	Aug. 13, 2020 USD ($)	Jun. 18, 2020 USD ($) shares	Jun. 17, 2020 USD ($) shares	Jun. 16, 2020	Feb. 26, 2020 USD ($) day $ / shares shares	Mar. 13, 2019 USD ($) $ / shares shares	Feb. 13, 2019 shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Feb. 22, 2019 shares
Schedule of Equity Method Investments [Line Items]
Principal amount redeemed									$ 679,681
Separation-related adjustments								$ 0	0	$ 93,666
Sale of units, convertible common stock, conversion basis						100.00%
Minimum convertible amount					$ 20,000
Conversion price threshold (in dollars per share) | $ / shares					$ 27.99
Consecutive trading days | day					20
Threshold share amount (in shares) | shares					1,000,000
Consecutive threshold trading days | day					20
Conversion price (in dollars per share) | $ / shares					$ 19.99
Conversion ratio					110.00%
Net changes in ownership of consolidated entities									257,200	(340,424)
EQM | Limited Partner Common
Schedule of Equity Method Investments [Line Items]
Partners' capital common units outstanding (in shares) | shares											117,245,455
Private Placement
Schedule of Equity Method Investments [Line Items]
Sale of stock, consideration received on transaction						$ 1,200,000
Preferred stock, dividend rate					9.75%
Quarterly distribution rate					8.15%
EQT | Private Placement
Schedule of Equity Method Investments [Line Items]
Private placement (in shares) | shares						24,605,291
EQM
Schedule of Equity Method Investments [Line Items]
Increase in mezzanine equity									667,200
Decrease in deferred taxes									12,500
EQM | Limited Partner Common
Schedule of Equity Method Investments [Line Items]
Units converted (in shares) | shares							21,811,643
EQM | IDR Merger Agreement
Schedule of Equity Method Investments [Line Items]
Common units issued (in shares) | shares							80,000,000
EQM | IDR Merger Agreement | Common Class B
Schedule of Equity Method Investments [Line Items]
Common units issued (in shares) | shares							7,000,000
EQGP | EQM | Limited Partner Common
Schedule of Equity Method Investments [Line Items]
Common units held by EQGP (in shares) | shares							21,811,643
Public Owned | EQM
Schedule of Equity Method Investments [Line Items]
Limited partner ownership interest				40.10%
EQM Merger
Schedule of Equity Method Investments [Line Items]
Separation-related adjustments									23,800
EQM Merger | Series A Preferred Units
Schedule of Equity Method Investments [Line Items]
Unit purchase price (in dollars per share) | $ / shares					$ 48.77	$ 48.77
Principal amount redeemed			$ 600,000		$ 600,000
Redemption rate		101.00%	101.00%
Cash paid to redeem preferred units			$ 617,300
Partners' capital		$ 590,100
Redemption premium		$ 27,300							27,300
Cumulative distribution	$ 10,900
EQM Merger | Preferred Stock
Schedule of Equity Method Investments [Line Items]
Equity instrument redemption (in shares) | shares		2.44	2.44
Redemption rate			244.00%
Noncontrolling Interests
Schedule of Equity Method Investments [Line Items]
Principal amount redeemed									579,157
Net changes in ownership of consolidated entities									(3,000,000)	(1,337,641)
Noncontrolling Interests | EQM
Schedule of Equity Method Investments [Line Items]
Net changes in ownership of consolidated entities									579,200
Common Stock
Schedule of Equity Method Investments [Line Items]
Principal amount redeemed									100,524
Net changes in ownership of consolidated entities									2,700,000	$ 997,217
Common Stock | EQM
Schedule of Equity Method Investments [Line Items]
Net changes in ownership of consolidated entities									$ 100,500
Minimum
Schedule of Equity Method Investments [Line Items]
Convertible threshold percentage					90.00%
Redemption rate					101.00%
Convertible debt issuance price, percent of weighted average price of common stock					95.00%
Minimum | Private Placement
Schedule of Equity Method Investments [Line Items]
Preferred stock, dividend rate					10.50%

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Investments in Consolidated, Non-Wholly-Owned Entities - Investment in EQGP (Details) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Jan. 10, 2019	Jan. 03, 2019	Nov. 29, 2018	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Value of shares purchased				$ 238,455
Noncontrolling Interests
Schedule of Equity Method Investments [Line Items]
Value of shares purchased					$ 244,400
Common Stock
Schedule of Equity Method Investments [Line Items]
Value of shares purchased				$ 38,648	46,800
EQGP | Phantom Units
Schedule of Equity Method Investments [Line Items]
EQGP phantom units (in shares)	29,829
Unit Purchase Agreements
Schedule of Equity Method Investments [Line Items]
Aggregate purchase price					$ 291,200
Unit Purchase Agreements | EQGP
Schedule of Equity Method Investments [Line Items]
Number of units purchased (in shares)		804,140	15,364,421		14,560,281
Price per common unit (in dollars per share)			$ 20.00
Aggregate purchase price		$ 16,100
Limited Call Right | EQGP
Schedule of Equity Method Investments [Line Items]
Number of units purchased (in shares)	11,097,287
Aggregate purchase price	$ 221,900

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Investments in Consolidated, Non-Wholly-Owned Entities - Net Changes in Ownership of EQGP and EQM (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Net changes in ownership of consolidated entities	$ 257,200	$ (340,424)
Noncontrolling Interests
Schedule of Equity Method Investments [Line Items]
Net changes in ownership of consolidated entities	(3,000,000)	(1,337,641)
Common Stock
Schedule of Equity Method Investments [Line Items]
Net changes in ownership of consolidated entities	$ 2,700,000	$ 997,217

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Mergers and Acquisitions - Narrative (Details) $ in Thousands							3 Months Ended	12 Months Ended
	Dec. 31, 2021 USD ($)	Apr. 01, 2020 USD ($)	Mar. 31, 2020	Oct. 01, 2019	Apr. 10, 2019 USD ($) mi	Mar. 13, 2019 USD ($) mi	Sep. 30, 2019 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Interest, net of amount capitalized								$ 343,351	$ 249,302	$ 257,065
Amortization of intangible assets								64,819	$ 63,195	53,258
Eureka Midstream Holdings, LLC
Business Acquisition [Line Items]
Length of gas and oil gathering lines | mi					190
Useful Life		10 years 9 months	20 years
Amortization of intangible assets		$ 9,100
Hornet Midstream Holdings, LLC
Business Acquisition [Line Items]
Length of gas and oil gathering lines | mi						15
Useful Life				7 years 3 months
Bolt-on Acquisition
Business Acquisition [Line Items]
Cash consideration	$ 852,376				$ 863,780
Repayments of outstanding credit agreements					28,200
Interest, net of amount capitalized					100
Acquisition related expenses										17,000
Acquisition related professional fees										15,300
Acquisition related compensation arrangements										$ 1,700
Goodwill recognized from acquisition					99,206		$ 99,200
Noncontrolling interest	$ 478,460				486,062			$ 478,460
Amortization of intangible assets							$ (400)
Unamortized carryover tax basis of tax-deductible goodwill					$ 43,000
EQM | Eureka Midstream Holdings, LLC
Business Acquisition [Line Items]
Indirect ownership percentage						60.00%
EQM | Hornet Midstream Holdings, LLC
Business Acquisition [Line Items]
Indirect ownership percentage						100.00%
EQM | Bolt-on Acquisition
Business Acquisition [Line Items]
Consideration transferred						$ 1,040,000
Cash consideration						852,000
Assumed pro-rata debt						$ 192,000

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Mergers and Acquisitions - Schedule of Preliminary Purchase Price Allocation (Details) - USD ($) $ in Thousands			3 Months Ended	9 Months Ended	12 Months Ended			33 Months Ended
	Dec. 31, 2021	Apr. 10, 2019	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2021
Goodwill [Roll Forward]
Goodwill beginning balance					$ 486,698	$ 486,698	$ 1,239,269
Impairment of goodwill			$ (268,100)				(851,777)
Goodwill ending balance	$ 486,698			$ 486,698	486,698	486,698	486,698	$ 486,698
Amortization of intangible assets					(64,819)	(63,195)	(53,258)
Bolt-on Acquisition
Consideration given:
Cash consideration	849,846	$ 861,250
Buyout of portion of Eureka Midstream Class B units and incentive compensation	2,530	2,530
Total consideration	852,376	863,780
Fair value of liabilities assumed:
Current liabilities	42,601	52,458			42,601			42,601
Long-term debt	300,825	300,825			300,825			300,825
Other long-term liabilities	10,203	10,203			10,203			10,203
Amount attributable to liabilities assumed	353,629	363,486			353,629			353,629
Fair value of assets acquired:
Cash	15,145	15,145			15,145			15,145
Accounts receivable	16,817	16,817			16,817			16,817
Inventory	12,965	12,991			12,965			12,965
Other current assets	882	882			882			882
Net property, plant and equipment	1,213,378	1,222,284			1,213,378			1,213,378
Intangible assets	311,000	317,000			311,000			311,000
Deferred tax asset	505	5,773			505			505
Other assets	14,567	14,567			14,567			14,567
Amount attributable to assets acquired	1,585,259	1,605,459			1,585,259			1,585,259
Noncontrolling interests	$ (478,460)	(486,062)			$ (478,460)			(478,460)
Measurement Period Adjustments (a)
Cash consideration								(11,404)
Current liabilities								(9,857)
Amount attributable to liabilities assumed								(9,857)
Inventory								(26)
Net property, plant and equipment								(8,906)
Intangible assets			(6,000)					(6,000)
Deferred tax asset								(5,268)
Amount attributable to assets acquired								(20,200)
Noncontrolling interests								$ 7,602
Measurement period adjustments		(8,663)
Goodwill [Roll Forward]
Goodwill beginning balance						$ 0
Goodwill prior to impairment adjustment		99,206	99,200
Impairment of goodwill				(99,206)
Goodwill ending balance		$ 107,869		$ 0			$ 0
Amortization of intangible assets			$ 400

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Mergers and Acquisitions - Post-Acquisition Operating Results (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Operating revenues	$ 97,123
Operating loss attributable to Equitrans Midstream	(94,551)
Net loss attributable to noncontrolling interests	(21,291)	$ 14,530	$ 214,912	$ 138,784
Net loss attributable to Equitrans Midstream	$ (80,631)	$ (1,380,478)	$ 423,132	$ (203,743)

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Mergers and Acquisitions - Unaudited Pro Forma Information (Details) - Bolt-on Acquisition $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares
Business Acquisition [Line Items]
Pro forma operating revenues	$ 1,661,822
Pro forma net loss	(44,167)
Pro forma net income attributable to noncontrolling interests	126,558
Pro forma net loss attributable to Equitrans Midstream	$ (170,725)
Pro forma loss per share (basic) (in dollars per share) | $ / shares	$ (0.67)
Pro forma loss per share (diluted) (in dollars per share) | $ / shares	$ (0.67)

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Impairments of Long-Lived Assets - Narrative (Details)				3 Months Ended				9 Months Ended	12 Months Ended
	Feb. 26, 2020 reportingUnit segment	Feb. 25, 2020 reportingUnit segment	Aug. 31, 2019 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Property, Plant and Equipment
Impairment of goodwill							$ 268,100,000				$ 851,777,000
Number of operating segments | segment	3	3
Number of reporting units | reportingUnit	6	7
Impairments of long-lived assets and equity method investments									$ 56,178,000	$ 55,581,000	969,258,000
Equity method investment, fair value assumption, discount rate									5.50%	5.50%
Impairment of equity method investment									$ 1,926,402,000	$ 0	0
MVP Joint Venture
Property, Plant and Equipment
Impairment of equity method investment									1,900,000,000
Equity method investment									$ 1,200,000,000
Disposal Group, Not Discontinued Operations | Copley Gathering System | EQM
Property, Plant and Equipment
Impairment of property and equipment											81,000,000
Bolt-on Acquisition
Property, Plant and Equipment
Impairment of goodwill								$ 99,206,000
Impairment of intangible assets							36,400,000
Impairments of long-lived assets and equity method investments						$ 0
Gathering
Property, Plant and Equipment
Impairment of intangible assets					$ 17,700,000
Impairment of property and equipment					$ 37,900,000
Water
Property, Plant and Equipment
Impairments of long-lived assets and equity method investments				$ 56,200,000
EQM Opco
Property, Plant and Equipment
Impairment of goodwill			$ 168,900,000				433,200,000				602,082,000
Eureka/Hornet
Property, Plant and Equipment
Impairment of goodwill			$ 99,200,000								99,206,000
Rice Retained Midstream
Property, Plant and Equipment
Impairment of goodwill							$ 150,500,000				$ 150,489,000

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Impairments of Long-Lived Assets - Schedule of Goodwill (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Aug. 31, 2019	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2018
Goodwill [Line Items]
Gross Goodwill					$ 1,600,416	$ 1,501,210
Accumulated impairment losses					(1,113,718)	(261,941)
Goodwill			$ 486,698	$ 486,698	486,698	1,239,269
Goodwill [Roll Forward]
Goodwill beginning balance			486,698	1,239,269
Add: goodwill associated with Bolt-on Acquisition				99,206
Less: impairment of goodwill		$ (268,100)		(851,777)
Goodwill ending balance			486,698	486,698
EQM Opco
Goodwill [Line Items]
Gross Goodwill					1,350,721	1,350,721
Accumulated impairment losses					(864,023)	(261,941)
Goodwill			486,698	486,698	486,698	1,088,780
Goodwill [Roll Forward]
Goodwill beginning balance			486,698	1,088,780
Add: goodwill associated with Bolt-on Acquisition				0
Less: impairment of goodwill	$ (168,900)	(433,200)		(602,082)
Goodwill ending balance			486,698	486,698
Rice Retained Midstream
Goodwill [Line Items]
Gross Goodwill					150,489	150,489
Accumulated impairment losses					(150,489)	0
Goodwill			0	0	0	150,489
Goodwill [Roll Forward]
Goodwill beginning balance			0	150,489
Add: goodwill associated with Bolt-on Acquisition				0
Less: impairment of goodwill		$ (150,500)		(150,489)
Goodwill ending balance			0	0
Eureka/Hornet
Goodwill [Line Items]
Gross Goodwill					99,206	0
Accumulated impairment losses					(99,206)	0
Goodwill			0	0	$ 0	$ 0
Goodwill [Roll Forward]
Goodwill beginning balance			0	0
Add: goodwill associated with Bolt-on Acquisition				99,206
Less: impairment of goodwill	$ (99,200)			(99,206)
Goodwill ending balance			$ 0	$ 0

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Financial Information by Business Segment - Narrative (Details)	12 Months Ended
	Dec. 31, 2021 segment lineOfBusiness
Segment Reporting [Abstract]
Number of business segments | segment	3
Number of lines of business | lineOfBusiness	3

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Financial Information by Business Segment - Schedule of Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended	12 Months Ended
		Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues from customers:
Total operating revenues				$ 1,317,037	$ 1,510,825	$ 1,630,242
Operating income (loss):
Total operating income				633,563	824,561	76,000
Reconciliation of operating income to net (loss) income:
Equity income	[1]			17,579	233,833	163,279
Impairment of equity method investment				(1,926,402)	0	0
Other (expense) income, net				(16,104)	17,225	2,661
Loss on extinguishment of debt				(41,025)	(24,864)	0
Net interest expense				(378,650)	(307,380)	(256,195)
Income tax (benefit) expense				(345,091)	105,331	50,704
Net (loss) income				(1,365,948)	638,044	(64,959)
Impairment of goodwill		$ 268,100				851,777
Segment assets:
Total assets			$ 12,041,709	10,920,764	12,725,852	12,041,709
Depreciation:
Total				270,404	259,613	227,364
Expenditures for segment assets:
Total				286,155	406,001	941,261
Bolt-on Acquisition
Reconciliation of operating income to net (loss) income:
Impairment of goodwill			99,206
Expenditures for segment assets:
Accrued capital expenditures			26,100	4,400	56,000	26,100
Gathering
Revenues from customers:
Total operating revenues				862,053	1,012,281	1,159,931
Gathering | RMP
Reconciliation of operating income to net (loss) income:
Impairment of goodwill					55,600	854,300
Transmission
Revenues from customers:
Total operating revenues				400,202	393,836	390,520
Water
Revenues from customers:
Total operating revenues				54,782	104,708	79,791
Water | RMP
Reconciliation of operating income to net (loss) income:
Tangible asset impairment charges				56,200
Operating segments
Segment assets:
Total assets			11,679,058	10,559,125	12,283,020	11,679,058
Operating segments | Gathering
Revenues from customers:
Total operating revenues				862,053	1,012,281	1,159,931
Operating income (loss):
Total operating income				414,200	535,976	(88,850)
Segment assets:
Total assets			7,572,911	7,638,877	7,739,836	7,572,911
Depreciation:
Total				188,633	172,967	144,310
Expenditures for segment assets:
Total				223,807	344,873	834,712
Operating segments | Gathering | Eureka Midstream Holdings, LLC
Expenditures for segment assets:
Total				14,100	41,600	25,900
Operating segments | Transmission
Revenues from customers:
Total operating revenues				400,202	393,836	390,520
Operating income (loss):
Total operating income				274,526	275,369	277,731
Segment assets:
Total assets			3,903,707	2,769,097	4,357,382	3,903,707
Depreciation:
Total				55,310	54,540	51,935
Expenditures for segment assets:
Total				25,977	45,219	59,313
Operating segments | Transmission | MVP Southgate Project
Expenditures for segment assets:
Total				287,700	272,800	774,600
Operating segments | Water
Revenues from customers:
Total operating revenues				54,782	104,708	79,791
Operating income (loss):
Total operating income				(53,980)	38,756	15,305
Segment assets:
Total assets			202,440	151,151	185,802	202,440
Depreciation:
Total				25,233	30,880	26,915
Expenditures for segment assets:
Total				34,877	11,905	37,457
Other/Headquarters
Operating income (loss):
Total operating income				(1,183)	(25,540)	(128,186)
Segment assets:
Total assets			$ 362,651	361,639	442,832	362,651
Depreciation:
Total				1,228	1,226	4,204
Expenditures for segment assets:
Total				$ 1,494	$ 4,004	$ 9,779

[1] Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note 9.

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Revenue from Contracts with Customers - Disaggregation of Revenue by Business Segment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 1,317,037,000	$ 1,510,825,000	$ 1,630,242,000
Firm reservation fee revenues (a)
Disaggregation of Revenue [Line Items]
Total operating revenues	839,542,000	1,002,051,000	948,877,000
Volumetric-based fee revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	477,495,000	508,774,000	681,365,000
Gathering
Disaggregation of Revenue [Line Items]
Total operating revenues	862,053,000	1,012,281,000	1,159,931,000
Gathering | Gathering revenues supported by MVCs
Disaggregation of Revenue [Line Items]
Total operating revenues	11,300,000	15,000,000	0
Gathering | Firm reservation fee revenues (a)
Disaggregation of Revenue [Line Items]
Total operating revenues	468,156,000	595,720,000	581,118,000
Gathering | Volumetric-based fee revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	393,897,000	416,561,000	578,813,000
Transmission
Disaggregation of Revenue [Line Items]
Total operating revenues	400,202,000	393,836,000	390,520,000
Transmission | Firm reservation fee revenues (a)
Disaggregation of Revenue [Line Items]
Total operating revenues	366,323,000	364,533,000	356,569,000
Transmission | Volumetric-based fee revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	33,879,000	29,303,000	33,951,000
Water
Disaggregation of Revenue [Line Items]
Total operating revenues	54,782,000	104,708,000	79,791,000
Water | Firm reservation fee revenues (a)
Disaggregation of Revenue [Line Items]
Total operating revenues	5,063,000	41,798,000	11,190,000
Water | Volumetric-based fee revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 49,719,000	$ 62,910,000	$ 68,601,000

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Revenue from Contracts with Customers - Changes in Unbilled Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Movement in Deferred Revenue [Roll Forward]
Balance as of beginning of period	$ 18,618	$ 0
Revenue recognized in excess of amounts invoiced	26,779	28,446
Minimum volume commitments invoiced	(28,442)	(9,828)
Amortization	(183)	0
Balance as of end of period	16,772	$ 18,618
Other contractual commitments	$ 6,400

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Revenue from Contracts with Customers - Narrative (Details) $ in Thousands				3 Months Ended	12 Months Ended
	Oct. 22, 2021 USD ($)	Mar. 05, 2020 USD ($) shares	Feb. 26, 2020 USD ($) agreement	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) Bcf	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Disaggregation of Revenue [Line Items]
Contract liability			$ 121,500	$ 822,416	$ 822,416	$ 398,750	$ 0
Contract with customer, liability, current				1,100	1,100
Contract with customer, liability, noncurrent				821,300	821,300
Estimated aggregate fee relief, year one			270,000
Estimated aggregate fee relief, year two			230,000
Estimated aggregate fee relief, year three			35,000
Option to forgo fee relief, year one			145,000
Option to forgo fee relief, year two			90,000
Cash payment to be made in exchange for fee relief			$ 196,000
Operating revenues					(1,317,037)	(1,510,825)	(1,630,242)
Value of shares purchased							238,455
Deferred tax liability				17,200	17,200
Revision of Prior Period, Adjustment
Disaggregation of Revenue [Line Items]
Contract liability				123,700	$ 123,700
Operating revenues				123,700
Common Stock, Cash Shares
Disaggregation of Revenue [Line Items]
Number of shares purchased (in shares) | shares		4,769,496
Common Stock, Cash Shares | Share Purchase Agreement
Disaggregation of Revenue [Line Items]
Value of shares purchased		$ 46,000
Common Stock, Rate Relief Shares And Cash Shares
Disaggregation of Revenue [Line Items]
Number of shares purchased (in shares) | shares		20,530,256
EQM
Disaggregation of Revenue [Line Items]
Number of share purchase agreements | agreement			2
Water Services Letter Agreement | EES
Disaggregation of Revenue [Line Items]
Cash amount			$ 60,000
Contract term	10 years
Water Services Letter Agreement | EES | Long-Term Contract With Customer, Period One
Disaggregation of Revenue [Line Items]
Cash amount	$ 40,000
Water Services Letter Agreement | EES | Long-Term Contract With Customer, Period Two
Disaggregation of Revenue [Line Items]
Cash amount	$ 35,000
EQT Corporation
Disaggregation of Revenue [Line Items]
Firm reservation capacity, per day | Bcf					3.0
Firm reservation capacity, step up per day | Bcf					4.0
Derivative instrument at fair value				$ 51,500	$ 51,500
EQT Corporation | Share Purchase Agreement
Disaggregation of Revenue [Line Items]
Value of shares purchased		$ 7,000
EQT Corporation | Common Stock, Rate Relief Shares And Cash Shares | Share Purchase Agreement
Disaggregation of Revenue [Line Items]
Value of shares purchased		$ 196,000
Gathering
Disaggregation of Revenue [Line Items]
Weighted average remaining term					14 years
Operating revenues					$ (862,053)	(1,012,281)	(1,159,931)
Transmission
Disaggregation of Revenue [Line Items]
Weighted average remaining term					13 years
Operating revenues					$ (400,202)	$ (393,836)	$ (390,520)

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Revenue from Contracts with Customers - Changes in Deferred Revenue Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Movement in Deferred Revenue [Roll Forward]
Balance as of beginning of period	$ 398,750	$ 0
Amounts recorded during the period	300,496	398,750
Change in estimated variable consideration	123,707	0
Amounts transferred during the period	(537)	0
Balance as of end of period	$ 822,416	$ 398,750

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Revenue from Contracts with Customers - Summary of Remaining Performance Obligations (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 13,024,408
Transmission
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	5,039,143
Water
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	377,063
Volumetric-based fee revenues | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	1,919,952
Gathering revenues supported by MVCs | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	5,688,250
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	925,198
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Transmission
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 362,096
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Water
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 33,313
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Volumetric-based fee revenues | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 88,587
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Gathering revenues supported by MVCs | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 441,202
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 955,625
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Transmission
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 358,222
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Water
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 37,500
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Volumetric-based fee revenues | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 105,667
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Gathering revenues supported by MVCs | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 454,236
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 997,897
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Transmission
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 375,984
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Water
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 37,500
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Volumetric-based fee revenues | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 157,484
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Gathering revenues supported by MVCs | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 426,929
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 996,195
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Transmission
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 362,814
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Water
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 37,500
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Volumetric-based fee revenues | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 149,923
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Gathering revenues supported by MVCs | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 445,958
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 993,621
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Transmission
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 357,910
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Water
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 37,500
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Volumetric-based fee revenues | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 141,091
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Gathering revenues supported by MVCs | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 457,120
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 8,155,872
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Transmission
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 3,222,117
Remaining performance obligations, expected timing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Water
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 193,750
Remaining performance obligations, expected timing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Volumetric-based fee revenues | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 1,277,200
Remaining performance obligations, expected timing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Gathering revenues supported by MVCs | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 3,462,805
Remaining performance obligations, expected timing

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Leases - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Right-of-use asset	$ 43,400	$ 53,200
Operating lease liability	44,410	53,400
Cash paid for operating lease liabilities	$ 12,800	$ 14,800	$ 12,300
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Regulatory and other long-term liabilities	Regulatory and other long-term liabilities
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued liabilities	Accrued liabilities
Operating lease, liability, current	$ 8,300	$ 10,000
Weighted average remaining lease term	7 years	8 years
Weighted average discount rate	5.80%	5.70%
Cumulative Effect, Period of Adoption, Adjustment
Lessee, Lease, Description [Line Items]
Right-of-use asset				$ 49,700
Operating lease liability				$ 49,700

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Leases - Schedule of Operating Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 12,571	$ 14,464	$ 12,858
Short-term lease cost	6,057	5,075	4,642
Variable lease cost	7	168	321
Sublease income	(492)	(583)	(445)
Total lease cost	$ 18,143	$ 19,124	$ 17,376

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Leases - Schedule of Operating Lease Liability Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
2022	$ 10,404
2023	8,065
2024	6,190
2025	4,970
2026	5,040
Thereafter	20,652
Total	55,321
Less: imputed interest	10,911
Present value of operating lease liability	$ 44,410	$ 53,400

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Related Party Transactions - Narrative (Details) - shares	Dec. 31, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Common stock, shares outstanding (in shares)	432,522,000	432,470,000
EQT Corporation
Related Party Transaction [Line Items]
Common stock, shares outstanding (in shares)	22,796,026
EQT Corporation | Equitrans Midstream
Related Party Transaction [Line Items]
Ownership interest	5.30%

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Related Party Transactions - Summary of Related Party Transactions (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transactions [Abstract]
Operating revenues		$ 777,276	$ 964,220	$ 1,122,626
Separation and other transaction costs		0	0	(1,440)
Equity income	[1]	17,579	233,833	163,279
Interest income from the Preferred Interest		5,767	6,053	6,324
Capital contributions to the MVP Joint Venture		(287,665)	(272,801)	(774,593)
Principal payments received on the Preferred Interest		5,217	5,003	4,661
Net distributions to EQT		$ 0	$ 0	$ (93,666)

[1] Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note 9.

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Related Party Transactions - Summary of Due To (From) Related Parties (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Related Party Transactions [Abstract]
Accounts receivable	$ 190,410	$ 199,674
Contract asset	2,246	2,207
Investments in unconsolidated entity	1,239,039	2,796,316
Preferred Interest	99,838	105,056
Capital contributions payable to the MVP Joint Venture	72,188	10,723
Contract liability	$ 818,658	$ 398,750

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Investment in Unconsolidated Entity - Narrative (Details) $ in Millions	1 Months Ended			12 Months Ended
	Feb. 28, 2022 USD ($)	Jan. 31, 2022 USD ($)	Nov. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) mi	Mar. 31, 2020 USD ($)	Nov. 04, 2019 USD ($)	Apr. 30, 2018 mi
MVP | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Length of pipeline | mi				300
Issuance of performance guarantee, remaining capital obligation, percentage				33.00%
MVP Southgate Project | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Length of pipeline | mi							75
MVP Joint Venture | Beneficial Owner
Schedule of Equity Method Investments [Line Items]
Percentage of ownership interest				66.67%
MVP Joint Venture | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Capital call notice			$ 72.0
MVP Joint Venture | Variable Interest Entity, Not Primary Beneficiary | Subsequent Event
Schedule of Equity Method Investments [Line Items]
Capital call notice	$ 19.1	$ 52.9
MVP Southgate Project | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Letters of credit					$ 14.2
MVP Project | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Letters of credit				$ 219.7	$ 220.2
EQT | MVP Joint Venture | Variable Interest Entity, Not Primary Beneficiary | Equitrans Midstream
Schedule of Equity Method Investments [Line Items]
Ownership interest				46.80%
EQT | MVP Southgate Project | Variable Interest Entity, Not Primary Beneficiary | Equitrans Midstream
Schedule of Equity Method Investments [Line Items]
Ownership interest				47.20%
ConEdison | Variable Interest Entity, Not Primary Beneficiary | Maximum
Schedule of Equity Method Investments [Line Items]
Option to cap investment amount						$ 530.0

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Investment in Unconsolidated Entity - Schedule of Unaudited Condensed Financial Statements for the Investment in Unconsolidated Equity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Consolidated Balance Sheets
Current assets	$ 446,829	$ 561,737
Total assets	10,920,764	12,725,852	$ 12,041,709
Current liabilities	367,576	594,878
Equity	2,010,726	3,681,272	5,282,080	$ 5,259,633
Total liabilities, mezzanine equity and shareholders' equity	10,920,764	12,725,852
Condensed Statements of Consolidated Operations
Net (loss) income	(1,365,948)	638,044	(64,959)
MVP Joint Venture | Variable Interest Entity, Not Primary Beneficiary
Condensed Statements of Consolidated Operations
Operating expenses	(399)	(360)	(2,416)
Other income	18	288	6,243
Net interest income	11,452	150,995	105,382
AFUDC – equity	26,722	352,323	245,890
MVP Joint Venture | Equity Method Investment, Nonconsolidated Investee or Group of Investees | Variable Interest Entity, Not Primary Beneficiary
Condensed Consolidated Balance Sheets
Current assets	148,820	146,054
Non-current assets	6,432,288	5,848,298
Total assets	6,581,108	5,994,352
Current liabilities	160,331	217,086
Equity	6,420,777	5,777,266
Total liabilities, mezzanine equity and shareholders' equity	6,581,108	5,994,352
Condensed Statements of Consolidated Operations
Net (loss) income	$ 37,793	$ 503,246	$ 355,099

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Share-based Compensation Plans - Narrative (Details)	1 Months Ended	12 Months Ended
	Jan. 31, 2022 shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Nov. 12, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion rate for share-based compensation awards transferred		0.8
Capitalized cost | $		$ 4,200,000	$ 1,900,000	$ (500,000)
Share-based payment arrangement, tax expense for excess tax benefits | $		2,000,000	200,000	700,000
Total liability awards | $		$ 50,372,000	46,108,000
Weighted average exercise price of stock options (in dollars per share) | $ / shares		$ 38.55
Defined contribution plan expense | $		$ 7,600,000	$ 8,100,000	$ 7,800,000
Equitrans Midstream Corporation 2018 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares of common stock that may be issued and granted (in shares)					38,592,386
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award requisite service period		36 months
Performance Shares | 2020 Equitrans Midstream PSU Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Per year vest award percentage		20.00%
Cumulative vest award percent		40.00%
Performance Shares | 2021 Performance Share Unit Awards | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	1,997,750
Target payout percent	100.00%
Number of shared outstanding and vested (in shares)	1,274,910
Units expected to be paid in cash (in shares)	722,840
Performance Shares | Minimum | 2019 Equitrans Midstream PSU Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout factor			0.00%
Performance Shares | Minimum | 2021 Performance Share Unit Awards | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout factor	0.00%
Performance Shares | Maximum | 2019 Equitrans Midstream PSU Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout factor			200.00%
Performance Shares | Maximum | 2021 Performance Share Unit Awards | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout factor	200.00%
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		660,250
Period after which the shares granted will be fully vested		3 years
Unrecognized compensation cost | $		$ 5,500,000
Weighted average vesting term		1 year 2 months 26 days
Awards outstanding (in shares)		1,393,401	841,068
Number of shared outstanding and vested (in shares)		58,185
Restricted Stock | EQT Corporation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		660,250	491,640	344,796
Restricted Stock | 2021 Performance Share Unit Awards | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	546,520
Restricted Stock Units, Liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period after which the shares granted will be fully vested		3 years
Total liability awards | $		$ 7,900,000	$ 4,500,000
Restricted Stock Units, Liability | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period after which the shares granted will be fully vested	3 years
Restricted Stock Units, Liability | EQT Corporation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		430,800	455,619	271,233
Restricted Stock Units, Liability | 2021 Performance Share Unit Awards | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	310,320
Nonqualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		0
Unrecognized compensation cost | $		$ 0
Stock options outstanding (in shares)		464,876
Exercisable (in shares)		464,876
Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding (in shares)		512,440
Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term for risk-free rate		3 years
Liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term for risk-free rate		2 years
First anniversary of the grant date | VDPSU Programs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		50.00%
Second anniversary of the grant date | VDPSU Programs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		50.00%

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Share-based Compensation Plans - Schedule of Share-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 22,694	$ 16,949	$ 6,414
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	11,268	7,422	5,197
Other programs, including non-employee director awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	3,205	1,577	1,833
2017 Incentive PSU Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	0	0	(893)
2018 Incentive PSU Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	0	698	(360)
2019 Equitrans Midstream PSU Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	984	4,935	0
2020 Equitrans Midstream PSU Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	1,297	2,317	0
2021 Equitrans Midstream PSU Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	5,940	0	0
2018 EQT Value Driver Performance Share Unit Award Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 0	$ 0	$ 637

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Share-based Compensation Plans - Schedule of Executive Performance Incentive Programs (Details) - Performance Shares $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
2017 Incentive Performance Share Unit Program, Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 120.60
Awards Paid (in shares) | shares	66,822
Value (Millions) | $	$ 8.1
2017 Incentive Performance Share Unit Program, Liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 13.36
Awards Paid (in shares) | shares	146,387
Value (Millions) | $	$ 2.0
2018 Incentive Performance Share Unit Program, Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 76.53
Awards Paid (in shares) | shares	40,349
Value (Millions) | $	$ 3.1
2018 Incentive Performance Share Unit Program, Liability | First Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 8.04
Awards Paid (in shares) | shares	40,769
Value (Millions) | $	$ 0.3
2018 Incentive Performance Share Unit Program, Liability | Second Tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 0
Awards Paid (in shares) | shares	0
Value (Millions) | $	$ 0.0
2019 Incentive Performance Share Unit Program, Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 15.03
Awards Outstanding (in shares) | shares	474,488
2019 Incentive Performance Share Unit Program, Liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 0
Awards Outstanding (in shares) | shares	209,525
2020 Incentive Performance Share Unit Program, Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 5.59
Awards Outstanding (in shares) | shares	703,583
2020 Incentive Performance Share Unit Program, Liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 7.19
Awards Outstanding (in shares) | shares	406,050
2021 Incentive Performance Share Unit Program, Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 8.77
Awards Outstanding (in shares) | shares	1,481,126
2021 Incentive Performance Share Unit Program, Liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 13.73
Awards Outstanding (in shares) | shares	856,190

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Share-based Compensation Plans - Monte Carlo Simulation Valuation Method (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free rate	0.67%	0.28%
Volatility factor	61.00%	42.00%
Expected term	2 years	1 year
Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free rate	0.16%	0.39%	2.54%
Volatility factor	61.00%	53.00%	30.00%
Expected term	3 years	3 years	3 years

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Share-based Compensation Plans - Summary of Restricted Stock Activity (Details) - Restricted Stock	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Non-vested Shares
Outstanding, beginning balance (in shares) | shares	841,068
Granted (in shares) | shares	660,250
Vested (in shares) | shares	(58,185)
Forfeited (in shares) | shares	(49,732)
Outstanding, ending balance (in shares) | shares	1,393,401
Weighted Average Fair Value
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 17.08
Granted (in dollars per share) | $ / shares	8.04
Vested (in dollars per share) | $ / shares	44.20
Forfeited (in dollars per share) | $ / shares	11.17
Outstanding, ending balance (in dollars per share) | $ / shares	$ 11.88
Aggregate Fair Value
Outstanding at January 1, 2021 | $	$ 14,366,346
Granted | $	5,308,410
Vested | $	(2,572,026)
Forfeited | $	(555,522)
Outstanding at December 31, 2021 | $	$ 16,547,208
Liability
Non-vested Shares
Outstanding, beginning balance (in shares) | shares	877,596
Granted (in shares) | shares	430,800
Vested (in shares) | shares	(190,036)
Forfeited (in shares) | shares	(38,656)
Outstanding, ending balance (in shares) | shares	1,079,704
Weighted Average Fair Value
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 15.46
Granted (in dollars per share) | $ / shares	8.06
Vested (in dollars per share) | $ / shares	20.76
Forfeited (in dollars per share) | $ / shares	10.73
Outstanding, ending balance (in dollars per share) | $ / shares	$ 11.74
Aggregate Fair Value
Outstanding at January 1, 2021 | $	$ 13,565,895
Granted | $	3,472,652
Vested | $	(3,944,942)
Forfeited | $	(414,837)
Outstanding at December 31, 2021 | $	$ 12,678,768

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Share-based Compensation Plans - Schedule of Value Driver Award Programs (Details) - Value Driver Award $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares
2018 EQT VDPSU Program, Vesting February 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 20.02
Cash Paid (Millions) | $	$ 4.1
2018 EQT VDPSU Program, Vesting February 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value per Unit (in dollars per share) | $ / shares	$ 13.36
Cash Paid (Millions) | $	$ 2.3

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Share-based Compensation Plans - Schedule of Phantom Unit Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	$ 22,694	$ 16,949	$ 6,414
Equitrans Midstream Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	149,280	92,760	45,000
Weighted Average Fair Value (in dollars per share)	$ 8.04	$ 11.51	$ 20.02
Compensation Expense	$ 1,200	$ 1,100	$ 900
EQGP Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0	0	8,500
Weighted Average Fair Value (in dollars per share)	$ 0	$ 0	$ 20.00
Compensation Expense	$ 0	$ 0	$ 200
EQM Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0	9,540	5,910
Weighted Average Fair Value (in dollars per share)	$ 0	$ 29.91	$ 43.25
Compensation Expense	$ 0	$ 300	$ 300

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Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021	Jan. 15, 2021	Jan. 08, 2021	Dec. 31, 2020	Aug. 31, 2019
Eureka Credit Facility | Revolving Credit Facility | EQT
Debt Instrument [Line Items]
Borrowings outstanding	$ 280,000				$ 302,500
Amended 2019 EQM Term Loan Agreement | EQT
Debt Instrument [Line Items]
Principal				$ 1,400,000		$ 1,400,000
Line of credit
Debt Instrument [Line Items]
Principal	505,000				787,500
Line of credit | Amended EQM Credit Facility
Debt Instrument [Line Items]
Principal	225,000				485,000
Term Loans | Amended 2019 EQM Term Loan Agreement
Debt Instrument [Line Items]
Principal	$ 0				1,400,000
EQM Senior notes | EQM 4.00% Senior Notes due 2024
Debt Instrument [Line Items]
Interest rate	4.00%
Principal	$ 500,000				500,000
EQM Senior notes | EQM 4.125% Senior Notes due 2026
Debt Instrument [Line Items]
Interest rate	4.125%
Principal	$ 500,000				500,000
EQM Senior notes | EQM 4.50% Senior Notes due 2029
Debt Instrument [Line Items]
Interest rate	4.50%
Principal	$ 800,000				0
Borrowings	790,927				0
Fair Value	$ 834,856				0
EQM Senior notes | EQM 4.75% Senior Notes due 2023
Debt Instrument [Line Items]
Interest rate	4.75%
Principal	$ 600,000				1,100,000
EQM Senior notes | EQM 4.75% Senior Notes due 2023 | EQT
Debt Instrument [Line Items]
Interest rate		4.75%
Principal		$ 500,000	$ 500,000
EQM Senior notes | EQM 4.75% Senior Notes due 2031
Debt Instrument [Line Items]
Interest rate	4.75%
Principal	$ 1,100,000				0
Borrowings	1,087,493				0
Fair Value	$ 1,166,220				0
EQM Senior notes | EQM 5.50% Senior Notes due 2028
Debt Instrument [Line Items]
Interest rate	5.50%
Principal	$ 850,000				850,000
EQM Senior notes | EQM 6.50% Senior Notes due 2048
Debt Instrument [Line Items]
Interest rate	6.50%
Principal	$ 550,000				550,000
EQM Senior notes | EQM 6.00% Senior Notes due 2025
Debt Instrument [Line Items]
Interest rate	6.00%
Principal	$ 700,000				700,000
EQM Senior notes | EQM 6.50% Senior Notes due 2027
Debt Instrument [Line Items]
Interest rate	6.50%
Principal	$ 900,000				900,000
Notes and Loans Payable
Debt Instrument [Line Items]
Total long-term debt	6,500,000				6,500,000
Carrying Value | Line of credit
Debt Instrument [Line Items]
Borrowings	505,000				787,500
Carrying Value | Line of credit | Amended EQM Credit Facility
Debt Instrument [Line Items]
Borrowings	225,000				485,000
Carrying Value | Line of credit | Eureka Credit Facility
Debt Instrument [Line Items]
Borrowings	280,000				302,500
Carrying Value | Term Loans | Amended 2019 EQM Term Loan Agreement
Debt Instrument [Line Items]
Borrowings	0				1,397,768
Carrying Value | EQM Senior notes | EQM 4.00% Senior Notes due 2024
Debt Instrument [Line Items]
Borrowings	498,014				497,245
Carrying Value | EQM Senior notes | EQM 4.125% Senior Notes due 2026
Debt Instrument [Line Items]
Borrowings	495,816				494,966
Carrying Value | EQM Senior notes | EQM 4.75% Senior Notes due 2023
Debt Instrument [Line Items]
Borrowings	598,088				1,094,235
Carrying Value | EQM Senior notes | EQM 5.50% Senior Notes due 2028
Debt Instrument [Line Items]
Borrowings	842,657				841,538
Carrying Value | EQM Senior notes | EQM 6.50% Senior Notes due 2048
Debt Instrument [Line Items]
Borrowings	539,778				539,393
Carrying Value | EQM Senior notes | EQM 6.00% Senior Notes due 2025
Debt Instrument [Line Items]
Borrowings	692,662				690,565
Carrying Value | EQM Senior notes | EQM 6.50% Senior Notes due 2027
Debt Instrument [Line Items]
Borrowings	889,510				887,602
Carrying Value | Notes and Loans Payable
Debt Instrument [Line Items]
Total long-term debt	6,434,945				6,443,312
Fair Value | Line of credit
Debt Instrument [Line Items]
Fair Value	505,000				787,500
Fair Value | Line of credit | Amended EQM Credit Facility
Debt Instrument [Line Items]
Fair Value	225,000				485,000
Fair Value | Line of credit | Eureka Credit Facility
Debt Instrument [Line Items]
Fair Value	280,000				302,500
Fair Value | Term Loans | Amended 2019 EQM Term Loan Agreement
Debt Instrument [Line Items]
Fair Value	0				1,400,000
Fair Value | EQM Senior notes | EQM 4.00% Senior Notes due 2024
Debt Instrument [Line Items]
Fair Value	522,695				515,455
Fair Value | EQM Senior notes | EQM 4.125% Senior Notes due 2026
Debt Instrument [Line Items]
Fair Value	517,695				512,285
Fair Value | EQM Senior notes | EQM 4.75% Senior Notes due 2023
Debt Instrument [Line Items]
Fair Value	628,380				1,162,590
Fair Value | EQM Senior notes | EQM 5.50% Senior Notes due 2028
Debt Instrument [Line Items]
Fair Value	939,684				933,980
Fair Value | EQM Senior notes | EQM 6.50% Senior Notes due 2048
Debt Instrument [Line Items]
Fair Value	673,458				582,995
Fair Value | EQM Senior notes | EQM 6.00% Senior Notes due 2025
Debt Instrument [Line Items]
Fair Value	763,091				767,375
Fair Value | EQM Senior notes | EQM 6.50% Senior Notes due 2027
Debt Instrument [Line Items]
Fair Value	1,014,417				1,020,060
Fair Value | Notes and Loans Payable
Debt Instrument [Line Items]
Total long-term debt	$ 7,060,496				$ 6,894,740

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Debt - Debt Maturity (Details)	Dec. 31, 2021 USD ($)
Debt Disclosure [Abstract]
Combined aggregate amounts of maturities for long-term debt in 2022	$ 0
Combined aggregate amounts of maturities for long-term debt in 2023	600,000,000
Combined aggregate amounts of maturities for long-term debt in 2024	500,000,000
Combined aggregate amounts of maturities for long-term debt in 2025	700,000,000
Combined aggregate amounts of maturities for long-term debt in 2026	500,000,000
Combined aggregate amounts of maturities for long-term debt in 2027 and thereafter	$ 4,200,000,000

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Debt - Equitrans Midstream Term Loan Facility (Details) - USD ($) $ in Thousands		1 Months Ended	2 Months Ended	12 Months Ended
	Mar. 03, 2020	Dec. 31, 2018	Mar. 03, 2020	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Current portion of revolving credit facility borrowings					$ 0	$ 302,500
Revolving credit facility borrowings					$ 505,000	$ 485,000
Term Loans | ETRN Term Loan Credit Agreement
Debt Instrument [Line Items]
Principal		$ 600,000
Net proceeds from offering	$ 650,000	568,100
Discount		18,000
Debt issuance costs		$ 13,900
Write off of unamortized debt	$ 24,400
Weighted average annual interest rate			6.20%	6.80%

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Debt - Equitrans Midstream Credit Facility (Details) - USD ($)		2 Months Ended	12 Months Ended
	Mar. 03, 2020	Mar. 03, 2020	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Oct. 31, 2018
Debt Instrument [Line Items]
Letters of credit outstanding				$ 505,000,000	$ 485,000,000
Line of credit | Equitrans Midstream Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 100,000,000
Write off of unamortized debt	$ 500,000
Borrowings outstanding			$ 0
Maximum amount of short term loans outstanding			44,000,000
Average daily balance of short term loans outstanding			$ 3,200,000
Weighted average annual interest rate			4.20%
Commitment fees paid		$ 100,000	$ 500,000
Letter of credit | Equitrans Midstream Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding	$ 0	$ 0	$ 0

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Debt - EQM Revolving Credit Facility and Amended 2019 EQM Term Loan Agreement (Details)				12 Months Ended
	Apr. 16, 2021 USD ($)	Jan. 07, 2021	Mar. 30, 2020	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jan. 08, 2021 USD ($)	Aug. 31, 2019 USD ($)	Nov. 01, 2018 USD ($)	Oct. 31, 2018 USD ($)
Debt Instrument [Line Items]
Revolving credit facility borrowings				$ 505,000,000	$ 485,000,000
Line of credit
Debt Instrument [Line Items]
Principal				505,000,000	787,500,000
Amended EQM Credit Facility | EQM | Revolving Credit Facility
Debt Instrument [Line Items]
Borrowings				225,000,000	485,000,000
Revolving credit facility borrowings				234,900,000	246,000,000
Amended EQM Credit Facility | Line of credit
Debt Instrument [Line Items]
Principal				225,000,000	485,000,000
Amended EQM Credit Facility | Line of credit | EQM
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 2,250,000,000								$ 3,000,000,000	$ 1,000,000,000
Increase limit	750,000,000
Debt related commitment fees				7,400,000	7,200,000	$ 4,600,000
Amended EQM Credit Facility | Line of credit | EQM | Debt Covenant Period One
Debt Instrument [Line Items]
Consolidated leverage ratio			5.50
Amended EQM Credit Facility | Line of credit | EQM | Debt Covenant Period Two
Debt Instrument [Line Items]
Consolidated leverage ratio			5.95
Amended EQM Credit Facility | Line of credit | EQM | Debt Covenant Period Three
Debt Instrument [Line Items]
Consolidated leverage ratio			5.25
Amended EQM Credit Facility | Line of credit | EQM | Debt Covenant Period Four
Debt Instrument [Line Items]
Consolidated leverage ratio			5.00
Amended EQM Credit Facility | Line of credit | EQM | Alternate Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread above commitment fee			0.125%
Amended EQM Credit Facility | Line of credit | EQM | Alternate Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread above commitment fee			2.00%
Amended EQM Credit Facility | Line of credit | EQM | Eurodollar | Minimum
Debt Instrument [Line Items]
Basis spread above commitment fee			1.125%
Amended EQM Credit Facility | Line of credit | EQM | Eurodollar | Maximum
Debt Instrument [Line Items]
Basis spread above commitment fee			3.00%
Amended EQM Credit Facility | Line of credit | EQT
Debt Instrument [Line Items]
Maximum amount of short term loans outstanding				525,000,000	2,040,000,000	1,690,000,000
Average daily balance of short term loans outstanding				$ 395,000,000	$ 852,000,000	$ 846,000,000
Weighted average annual interest rate				2.60%	2.90%	3.60%
Amended EQM Credit Facility | Same-day swing line advances | EQM
Debt Instrument [Line Items]
Maximum borrowing capacity	250,000,000
Amended EQM Credit Facility | Letter of credit | EQM
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 400,000,000
Maximum amount of short term loans outstanding				$ 0
2019 Term Loan Facility | Unsecured debt | EQM
Debt Instrument [Line Items]
Weighted average annual interest rate		2.40%			2.70%	3.30%
Borrowings outstanding					$ 1,400,000,000
Amended 2019 EQM Term Loan Agreement | EQT
Debt Instrument [Line Items]
Principal							$ 1,400,000,000	$ 1,400,000,000
Amended 2019 EQM Term Loan Agreement | Unsecured debt | EQM
Debt Instrument [Line Items]
Principal								$ 300,000,000

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Debt - Eureka Credit Facility (Details) $ in Thousands		9 Months Ended	12 Months Ended
	May 13, 2021 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Line of credit
Debt Instrument [Line Items]
Principal			$ 505,000	$ 787,500
Eureka Credit Facility | Line of credit | Eureka Midstream, LLC
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 400,000
Increase limit	$ 500,000
Consolidated leverage ratio	4.75
Consolidated EBITDA ratio	3.50
Consolidated interest charged leverage ratio	2.50
Borrowings			280,000	303,000
Maximum amount of short term loans outstanding		$ 293,000	315,000	323,000
Average daily balance of short term loans outstanding		$ 288,000	$ 301,000	$ 301,000
Weighted average annual interest rate		4.20%	2.50%	2.60%
Commitment fees paid		$ 400	$ 500	$ 600
Eureka Credit Facility | Line of credit | Eureka Midstream, LLC | Maximum
Debt Instrument [Line Items]
Consolidated leverage ratio	5.25
Eureka Credit Facility | Line of credit | Eureka Midstream, LLC | Eurodollar
Debt Instrument [Line Items]
Basis spread above commitment fee	1.00%
Eureka Credit Facility | Line of credit | Eureka Midstream, LLC | Eurodollar | Minimum
Debt Instrument [Line Items]
Basis spread above commitment fee	2.00%
Eureka Credit Facility | Line of credit | Eureka Midstream, LLC | Eurodollar | Maximum
Debt Instrument [Line Items]
Basis spread above commitment fee	3.25%
Eureka Credit Facility | Line of credit | Eureka Midstream, LLC | Federal Funds Effective Rate
Debt Instrument [Line Items]
Basis spread above commitment fee	0.50%
Eureka Credit Facility | Line of credit | Eureka Midstream, LLC | Alternate Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread above commitment fee	1.00%
Eureka Credit Facility | Line of credit | Eureka Midstream, LLC | Alternate Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread above commitment fee	2.25%
Eureka Credit Facility | Senior notes | Eureka Midstream, LLC
Debt Instrument [Line Items]
Principal	$ 200,000
Eureka Credit Facility | Same-day swing line advances | Eureka Midstream, LLC
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 20,000

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Debt - 2021 Senior Notes (Details) - EQM Senior notes - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2021	Jan. 15, 2021	Jan. 08, 2021	Dec. 31, 2020
4.50% Senior Notes Due 2029
Debt Instrument [Line Items]
Principal	$ 800,000
Interest rate	4.50%
4.75% Senior Notes Notes Due 2031
Debt Instrument [Line Items]
Principal	$ 1,100,000
Interest rate	4.75%
2021 Senior Notes
Debt Instrument [Line Items]
Net proceeds from offering	$ 1,876,500
Discount	19,000
Debt issuance costs	4,500
Redemption rate				101.00%
EQM 4.75% Senior Notes due 2023
Debt Instrument [Line Items]
Principal		$ 600,000			$ 1,100,000
Interest rate		4.75%
EQM 4.75% Senior Notes due 2023 | EQT
Debt Instrument [Line Items]
Principal	$ 500,000		$ 500,000
Interest rate	4.75%
Debt issuance costs			$ 537,000

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Debt - Tender Offer (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 15, 2021
Debt Instrument [Line Items]
Loss on extinguishment of debt		$ 41,025	$ 24,864	$ 0
EQM Senior notes | EQM 4.75% Senior Notes due 2023
Debt Instrument [Line Items]
Principal		$ 600,000	$ 1,100,000
EQM Senior notes | EQM 4.75% Senior Notes due 2023 | EQT
Debt Instrument [Line Items]
Principal	$ 500,000				$ 500,000
Debt issuance costs					$ 537,000
Loss on extinguishment of debt	$ 41,000

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Debt - 2020 Senior Notes (Details) - EQM Senior notes - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2020	Jun. 18, 2020
6.00% Senior Notes Due 2025
Debt Instrument [Line Items]
Principal	$ 700.0
Interest rate	6.00%
6.50% Senior Note Due 2027
Debt Instrument [Line Items]
Principal	$ 900.0
Interest rate	6.50%
2020 Senior Notes
Debt Instrument [Line Items]
Net proceeds from offering	$ 1,576.1
Discount	20.0
Debt issuance costs	$ 3.9
Redemption rate		101.00%

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Fair Value Measurements (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Gain on derivative instrument	$ 16.4	$ 16.5
Measurement Input, Price Volatility | Valuation, Market Approach
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative asset, measurement input	0.39
EQM | Fair Value | Level 3 | EES
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Preferred interest	$ 117.0	127.0
EQM | Carrying Value | Level 3 | EES
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Preferred interest	100.0	105.0
Henry Hub cash payment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative instrument at fair value	$ 51.6	$ 68.0

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(Loss) Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		9 Months Ended	12 Months Ended
	Jun. 18, 2020	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Net (loss) income			$ (1,365,948)	$ 638,044	$ (64,959)
Net loss attributable to noncontrolling interests		$ (21,291)	14,530	214,912	138,784
Less: Preferred dividends			58,512	58,760	0
Net (loss) income attributable to Equitrans Midstream common shareholders			$ (1,438,990)	$ 364,372	$ (203,743)
Weighted average common shares outstanding (in shares)			433,008	343,935	254,884
Dilutive securities (in shares)			0	40	0
Diluted weighted average common shares outstanding - diluted (in shares)			433,008	343,975	254,884
(Loss) earnings per share of common stock attributable to Equitrans Midstream common shareholders (in dollars per share)			$ (3.32)	$ 1.06	$ (0.80)
(Loss) earnings per share of common stock attributable to Equitrans Midstream common shareholders (in dollars per share)			$ (3.32)	$ 1.06	$ (0.80)
Potentially dilutive securities (in shares)			30,556	16,512	5
Series A Preferred Units | EQM Merger
Class of Stock [Line Items]
Preferred Stock Redemption Premium	$ 27,300			$ 27,300
Excluding Series A Preferred Units
Class of Stock [Line Items]
Net loss attributable to noncontrolling interests			$ 14,530	167,553	$ 64,803
Series A Preferred Units
Class of Stock [Line Items]
Net loss attributable to noncontrolling interests			0	47,359	73,981
Equitrans Preferred Shares
Class of Stock [Line Items]
Less: Preferred dividends			$ 58,512	$ 58,760	$ 0
Phantom Units
Class of Stock [Line Items]
Potentially dilutive securities related to stock options and awards (shares)			498	288	208

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Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current income tax expense:
Federal	$ 0	$ 0	$ 0
State	4,853	2,613	0
Total current income tax expense	4,853	2,613	0
Deferred income tax (benefit) expense:
Federal	(274,857)	81,206	30,975
State	(75,087)	21,512	19,729
Total deferred income tax (benefit) expense	(349,944)	102,718	50,704
Total income tax (benefit) expense	$ (345,091)	$ 105,331	$ 50,704

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Income Taxes - Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax (benefit) expense at statutory rate	$ (359,318)	$ 156,109	$ (2,993)
Valuation allowance	97,634	0	0
State income tax (benefit) expense	(80,277)	19,058	15,587
Noncontrolling interests' share of earnings	(3,051)	(45,132)	(29,145)
Impairment of goodwill	0	0	78,177
AFUDC - equity	(2,595)	(28,346)	(14,127)
Other	2,516	3,642	3,205
Total income tax (benefit) expense	$ (345,091)	$ 105,331	$ 50,704
Effective tax rate	20.20%	14.20%	(355.70%)

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Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Reduction to income tax expense	$ 43,000
Valuation allowance	0	$ 97,634
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss	41,400	34,500
Valuation allowance		34,500
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Net operating loss	$ 13,500	16,700
Valuation allowance		16,700
State and Local Jurisdiction | PENNSYLVANIA
Operating Loss Carryforwards [Line Items]
Valuation allowance		$ 46,400

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Income Taxes - Components of Deferred Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred Tax Assets, Gross [Abstract]
Investment in partnerships	$ 67,153	$ 0
Net operating loss carryforwards	51,231	54,925
Total deferred tax assets	118,384	54,925
Valuation allowance	(97,634)	0
Net deferred tax asset	20,750	54,925
Deferred income tax liabilities:
Investment in partnerships	0	(379,432)
Deferred revenue	(17,120)	(18,257)
Other	(3,630)	(3,132)
Total deferred income tax liability	(20,750)	(400,821)
Net deferred income tax asset (liability)	$ 0	$ (345,896)

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Concentrations of Credit Risk (Details) - EQT Corporation	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	59.00%	64.00%	69.00%
Accounts receivable | Credit Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	75.00%	68.00%

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Commitments and Contingencies (Details) $ in Millions	Dec. 31, 2021 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remedial action included in other credits	$ 0.2
Purchase obligation	$ 3.9