S-1

As filed with the Securities and Exchange Commission on November 2, 2017

Registration No. 333‑

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S‑1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

ProPetro Holding Corp.

(Exact name of registrant as specified in its charter)

Delaware	1389	26‑3685382
(State or other jurisdiction of incorporation or organization)	(Primary Standard Industrial Classification Code Number)	(I.R.S. Employer Identification Number)

1706 S. Midkiff, Bldg. B

Midland, Texas 79701

(432) 688‑0012

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Dale Redman

Chief Executive Officer

1706 S. Midkiff, Bldg. B

Midland, Texas 79701

(432) 688‑0012

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Ryan J. Maierson Thomas G. Brandt Latham & Watkins LLP 811 Main Street, Suite 3700 Houston, Texas 77002 (713) 546‑5400 Alan Beck Douglas E. McWilliams Vinson & Elkins L.L.P. 1001 Fannin Street, Suite 2500 Houston, Texas 77002 (713) 758-2222

Approximate date of commencement of proposed sale to the public:

As soon as practicable after this Registration Statement becomes effective.

If any of the securities being registered on this form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, check the following box. ¨

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

If this Form is a post‑effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

If this Form is a post‑effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non‑accelerated filer, a 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 ¨	Non‑accelerated filer x (Do not check if a smaller reporting company)	Smaller reporting company ¨
			Emerging growth company x

The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.

CALCULATION OF REGISTRATION FEE

Title of Each Class of Securities to be Registered	Amount to be Registered (1)	Proposed Maximum Aggregate Offering Price(2)	Amount of Registration Fee
Common Stock, par value $0.001 per share	11,500,000	$15.69	$22,465

(1) Includes shares of common stock that Goldman Sachs & Co. LLC has the option to purchase.

(2) Estimated solely for the purpose of calculating the amount of the registration fee in accordance with Rule 457(c) under the Securities Act of 1933, as amended, on the basis of the average of the high and low prices of the Registrant’s common stock as reported on the New York Stock Exchange on November 1, 2017.

The information in this preliminary prospectus is not complete and may be changed. These securities may not be sold until the registration statement filed with the Securities and Exchange Commission becomes effective. This preliminary prospectus is not an offer to sell nor does it seek an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED NOVEMBER 2, 2017

PROSPECTUS

10,000,000 Shares

ProPetro Holding Corp.

Common Stock

The selling shareholders identified in the prospectus are offering 10,000,000 shares of our common stock. We will not receive any of the proceeds from the sale of the shares by the selling shareholders.

Our common stock is listed on the New York Stock Exchange, or NYSE, under the symbol “PUMP.” The last reported closing sales price of our common stock on November 1, 2017 was $15.73 per share. You are urged to obtain current market quotations for our common stock.

We are an “emerging growth company” as that term is used in the Jumpstart Our Business Startups Act of 2012, or JOBS Act, and are subject to reduced public company reporting requirements.

Investing in our common stock involves risks. You should consider the risks we have described in “Risk Factors” beginning on page 11.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

	Per Share	Total
Public offering price	$	$
Underwriting discounts and commissions (1)	$	$
Proceeds, before expenses, to the selling stockholders	$	$

___________________________

(1) We refer you to “Underwriting” beginning on page 91 of this prospectus for additional information regarding underwriting compensation.

The selling shareholders have granted Goldman Sachs & Co. LLC a 30-day option to purchase up to an additional 1,500,000 shares at the public offering price, less the underwriting discounts and commissions.

The underwriters expect to deliver the shares of common stock on or about, 2017.

Goldman Sachs & Co. LLC

The date of this prospectus is               , 2017.

TABLE OF CONTENTS

SUMMARY	1
THE OFFERING	7
SUMMARY HISTORICAL CONSOLIDATED FINANCIAL STATEMENTS	8
RISK FACTORS	11
USE OF PROCEEDS	26
PRICE RANGE OF COMMON STOCK AND DIVIDENDS	27
DIVIDEND POLICY	28
SELECTED HISTORICAL FINANCIAL DATA	29
MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	32
BUSINESS	48
MANAGEMENT	60
EXECUTIVE COMPENSATION	66
CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS	78
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT	81
SELLING SHAREHOLDERS	83
DESCRIPTION OF CAPITAL STOCK	84
MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES TO NON‑U.S. HOLDERS	87
UNDERWRITING	91
LEGAL MATTERS	95
EXPERTS	95
WHERE YOU CAN FIND ADDITIONAL INFORMATION	95
FORWARD‑LOOKING STATEMENTS	97
GLOSSARY OF OIL AND NATURAL GAS TERMS	A-1
INDEX TO FINANCIAL STATEMENTS	F-1
PART II	II-I
SIGNATURES	II-VII
EXHIBIT INDEX	II-IX

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ABOUT THIS PROSPECTUS

You should rely only on the information contained in this prospectus or in any free writing prospectus prepared by us or on behalf of us or to which we have referred you. We have not, and the selling shareholders have not, authorized any other person to provide you with information different from that contained in this prospectus and any free writing prospectus. If anyone provides you with different or inconsistent information, you should not rely on it. The selling shareholders are not making an offer to sell these securities in any jurisdiction where an offer or sale is not permitted. The information in this prospectus is accurate only as of the date of this prospectus, regardless of the time of delivery of this prospectus or any sale of our common stock. Our business, financial condition, results of operations and prospects may have changed since that date.

This prospectus contains forward‑looking statements that are subject to a number of risks and uncertainties, many of which are beyond our control. Please read “Risk Factors” and “Forward‑Looking Statements.”

We own or have rights to various trademarks, service marks and trade names that we use in connection with the operation of our business. This prospectus may also contain trademarks, service marks and trade names of third parties, which are the property of their respective owners. Our use or display of third parties’ trademarks, service marks, trade names or products in this prospectus is not intended to, and does not imply, a relationship with, or endorsement or sponsorship by us. Solely for convenience, the trademarks, service marks and trade names referred to in this prospectus may appear without the ®, TM or SM symbols, but such references are not intended to indicate, in any way, that we will not assert, to the fullest extent under applicable law, our rights or the right of the applicable licensor to these trademarks, service marks and trade names.

INDUSTRY AND MARKET DATA

The data included in this prospectus regarding the industry in which we operate, including descriptions of trends in the market and our position and the position of our competitors within our industries, has been obtained from publicly available information and publications as well as our good faith estimates.

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SUMMARY

This summary provides a brief overview of information contained elsewhere in this prospectus. This summary does not contain all of the information that you should consider before investing in our common stock. You should read the entire prospectus carefully, including the financial statements and the notes to those financial statements included in this prospectus and the documents incorporated by reference herein. You should read “Risk Factors” for more information about important risks that you should consider carefully before buying our common stock.

Unless the context otherwise requires, references in this prospectus to “ProPetro Holding Corp.,” “the Company,” “our company,” “we,” “our” and “us,” or like terms, refer to ProPetro Holding Corp. and its subsidiary. References to (i) “Energy Capital Partners” refer to Energy Capital Partners II, LP and its parallel and co‑investment funds and related investment vehicles and (ii) the “selling shareholders” refer to the selling shareholders that are offering shares of common stock as set forth in the section entitled “Selling Shareholders.” When we refer to the “utilization” of our fleet, we are referring to the percentage of our fleet in use by our customers at the applicable time or for the applicable period of determination. We have provided definitions for some of the terms we use to describe our business and industry and other terms used in this prospectus in the “Glossary of Oil and Natural Gas Terms” beginning on page A‑1 of this prospectus. Unless otherwise indicated, the information presented in this prospectus assumes that Goldman Sachs & Co. LLC does not exercise its option to purchase additional shares.

ProPetro Holding Corp.

Overview

We are a growth-oriented, Midland, Texas-based oilfield services company providing hydraulic fracturing and other complementary services to leading upstream oil and gas companies engaged in the exploration and production ("E&P") of North American unconventional oil and natural gas resources. Our operations are primarily focused in the Permian Basin, where we have cultivated long-standing customer relationships with some of the region's most active and well-capitalized E&P companies. The Permian Basin is widely regarded as the most prolific oil-producing area in the United States, and we believe we are currently one of the largest providers of hydraulic fracturing services in the region by hydraulic horsepower, or HHP, with a current aggregate deployed capacity of 690,000 HHP. Our fleet has been designed to handle the highest intensity, most complex hydraulic fracturing jobs and has been 100% utilized since September 2016. In the quarter ended September 30, 2017, we put three new hydraulic fracturing units into service. We also deployed one additional new hydraulic fracturing unit in the fourth quarter of 2017, bringing our current total to 16 deployed units. In addition, we have contracted to purchase one new additional hydraulic fracturing unit which is scheduled for delivery and deployment to a dedicated customer by the end of the first quarter of 2018. This unit will provide us with an additional 45,000 HHP, bringing our aggregate capacity to 735,000 HHP.

Our modern hydraulic fracturing fleet has been designed to handle Permian Basin specific operating conditions and the region’s increasingly high‑intensity well completions, which are characterized by longer horizontal wellbores, more frac stages per lateral and increasing amounts of proppant per well. Over 75% of our fleet has been delivered over the past four years, and approximately 85% of our fleet has been built by a single manufacturer since 2013. Further, we have fully maintained our equipment throughout the recent industry downturn to ensure optimal performance and reliability. In contrast, we believe many of our competitors have deferred necessary maintenance capital spending throughout the downturn, which we believe positions us to respond more quickly and reliably to customer needs during the ongoing market recovery.

In addition to our core hydraulic fracturing operations, we also offer a suite of complementary well completion and production services, including cementing, acidizing, coiled tubing, flowback services, Permian drilling and surface air drilling. Additionally, we believe these complementary services create operational efficiencies for our customers and allow us to capture a greater portion of their capital

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spending across the lifecycle of an unconventional well. We believe that these complementary services should benefit from a continued industry recovery and that we are well positioned to continue expanding these offerings in response to our customers’ increasing service needs and spending levels.

Our primary business objective is to serve as a strategic partner to our customers. We achieve this objective by providing reliable, high‑quality services that are tailored to our customers’ needs and synchronized with their well development programs. This alignment assists our customers in optimizing the long‑term development of their unconventional resources. Over the past four years, we have leveraged our strong Permian Basin relationships to grow our installed HHP capacity by over four times and organically build our Permian Basin cementing, coiled tubing and acidizing lines of business. Consistent with past performance, we believe our substantial market presence will continue to yield a variety of actionable growth opportunities allowing us to expand both our hydraulic fracturing and complementary services going forward. To this end, we intend to continue our past practice of opportunistically deploying new equipment on a long‑term, dedicated basis in response to specific customer demand.

Our Services

We primarily provide hydraulic fracturing services to E&P companies in the Permian Basin. These services are intended to optimize hydrocarbon flow paths during the completion phase of horizontal shale wellbores. Our Chief Executive Officer, Dale Redman, and our Chief Financial Officer, Jeffrey Smith, founded ProPetro in 2005 and, in 2009, strategically focused the Company’s operations on hydraulic fracturing targeting the Permian Basin. As of November 1, 2017, we had grown our hydraulic fracturing business to a total of 16 hydraulic fracturing units with an aggregate of 690,000 HHP, of which 590,000 HHP has been delivered since 2013. Further, we have contracted to purchase one new additional hydraulic fracturing unit, which is expected to be delivered before the end of the first quarter of 2018. This unit will provide us with an additional 45,000 HHP, bringing our total capacity to 735,000 HHP. Our fleet has been designed to handle the highest‑intensity, most complex hydraulic fracturing jobs, and is largely standardized across units to facilitate efficient maintenance and repair and reduce equipment downtime.

We provide dedicated equipment, personnel and services that are tailored to meet each of our customer’s needs. Each unit in our fleet has a designated team of personnel, which allows us to provide responsive and customized services, such as project design, proppant procurement, real‑time data provision and post‑completion analysis for each of our jobs. Many of our hydraulic fracturing units and associated personnel have continuously worked with the same customer for the past several years, promoting deep relationships and a high degree of coordination and visibility into future customer activity levels. Furthermore, in light of our substantial market position and historically high fleet utilization levels, we have established a variety of entrenched relationships with key equipment, sand and other downhole consumable suppliers, including over 25 sand suppliers utilized in 2017. These strategic relationships provide us ready access to equipment, parts and materials on a timely and economic basis and allow our dedicated procurement logistics team to ensure consistently reliable operations. In addition to our hydraulic fracturing operations, we offer a range of ancillary services to our customers, including cementing, acidizing, coiled tubing, flowback services and surface air drilling. We believe these services are complementary and synergistic with our hydraulic fracturing operations and have, in large part, grown organically with our customers’ demand for these services.

Competitive Strengths

Our primary business objective is to serve as a strategic partner for our customers. We achieve this objective by providing reliable, high‑quality services that are tailored to our customers’ needs and synchronized with their well development programs. This alignment assists our customers in optimizing the long‑term development of their unconventional resources. We believe that the following competitive strengths differentiate us from our peers and uniquely position us to achieve our primary business objective.

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• Strong market position in the Permian Basin. We believe we are one of the largest hydraulic fracturing providers by HHP in the Permian Basin, which is the most prolific oil producing area in the United States. Our longstanding customer relationships and substantial Permian Basin market presence uniquely position us to continue growing in tandem with the basin’s ongoing development. The Permian Basin is a mature, liquids‑rich basin with well‑known geology and a large, exploitable resource base that delivers attractive E&P producer economics at or below current commodity prices. As a result of its significant size, coupled with the presence of multiple prospective geologic benches and other favorable characteristics, the Permian Basin has become widely recognized as the most attractive and economic oil resource in North America.

Our operational focus has historically been in the Permian Basin’s Midland sub‑basin in support of our customers’ core operations. More recently, however, many of our customers (including Callon Petroleum, Diamondback Energy, Parsley Energy, RSP Permian and XTO Energy) have made sizeable acquisitions in the Delaware Basin. We anticipate that many of these customers will request our services in the Delaware Basin to help develop their acreage, and we believe that we are uniquely positioned to capture a large addressable growth opportunity as the basin develops. For the foreseeable future, we expect both the Midland Basin and the Delaware Basin to continue to command a disproportionate share of future North American E&P spending.

• Hydraulic fracturing is highly levered to increasing drilling activity and completion intensity levels. The combination of an expanding Permian Basin horizontal rig count and more complex well completions has a compounding effect on HHP demand growth. Horizontal drilling has become the default method for E&P operators to most economically extract unconventional resources, and the number of horizontal rigs has increased from 22% of the total Permian Basin rig count in December 2011 to approximately 89% of the Permian Basin rig count at the end of October 2017. As the horizontal rig count has grown, well completion intensity levels have also increased as a result of longer wellbore lateral lengths, more fracturing stages per foot of lateral and increasing amounts of proppant per stage. Furthermore, the ongoing improvement in drilling and completion efficiencies, driven by innovations such as multi‑well pads and zipper fracs, have further increased the demand for HHP. Taken together, these demand drivers have helped contribute to the full utilization of our fleet and leave us well positioned to capture future organic growth opportunities and enhanced pricing for the services we offer.

• Deep relationships and operational alignment with high‑quality, Permian Basin‑focused customers. Our deep local roots, operational expertise and commitment to safe and reliable service have allowed us to cultivate longstanding customer relationships with the most active and well‑capitalized Permian Basin operators. Our diverse customer base is comprised of market leaders such as Callon Petroleum, Diamondback Energy, Parsley Energy, Pioneer Natural Resources, Surge Energy and XTO Energy, with no single customer representing more than 20% of our revenue for the year ended December 31, 2016. Many of our current customers have worked with us since our inception and have integrated our fleet scheduling with their well development programs. This high degree of operational alignment and their continued support have allowed us to maintain relatively high utilization rates over time. As our customers increase activity levels, we expect to continue to leverage these strong relationships to keep our fleet fully utilized and selectively expand our platform in response to specific customer demand.

• Standardized fleet of modern, well‑maintained equipment. We have a large, homogenous fleet of modern equipment that is configured to handle the Permian Basin’s most complex, highest‑intensity, hydraulic fracturing jobs. We believe that our fleet design is a key competitive advantage compared to many of our competitors who have fracturing units that are not optimized for Permian Basin conditions. Our fleet is largely standardized across units to facilitate efficient maintenance and repair, reducing equipment downtime and improving labor efficiency. Importantly, we have fully maintained our fleet throughout the recent industry downturn to ensure optimal performance and reliability. In contrast, we believe many of our competitors have deferred

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necessary maintenance capital spending and cannibalized essential equipment for spare parts during the same period. Furthermore, our entrenched relationships with a variety of key suppliers and vendors provide us with the reliable access to the equipment necessary to support our continued organic growth strategy.

• Proven cross‑cycle financial performance. Over the past several years, we have maintained relatively high cross‑cycle fleet utilization rates. Since September 2016, our fleet has been 100% utilized, and for each of the years ended December 31, 2015 and 2016 and the quarter ended September 30, 2017, we operated in excess of 65% utilization. Our consistent track record of steady organic growth, coupled with our ability to immediately deploy new HHP on a dedicated and fully utilized basis, has resulted in revenue growth across industry cycles. We believe that we will be able to grow faster than our competitors while preserving attractive EBITDA margins as a result of our differentiated service offerings and a robust backlog of demand for our services. Furthermore, we believe that our philosophy of maintaining modest financial leverage and a healthy balance sheet has left us more conservatively capitalized than our peers. Several of our customers have recently requested additional HHP capacity from us, and we expect that improving market fundamentals, our superior execution and our customer‑focused approach should result in enhanced financial performance going forward.

• Seasoned management and operating team and exemplary safety record. We have a seasoned executive management team, with our three most senior members contributing more than 100 years of collective industry and financial experience. Members of our management team founded our business and seeded our company with a portion of our original investment capital. We believe their track record of successfully building premier oilfield service companies in the Permian Basin, as well as their deep roots and relationships throughout the West Texas community, provide a meaningful competitive advantage for our business. In addition, our management team has assembled a loyal group of highly‑motivated and talented divisional managers and field personnel, and we have had virtually no manager‑level turnover in our core service divisions over the past three years. We employ a balanced decision‑making structure that empowers managerial and field personnel to work directly with customers to develop solutions while leveraging senior management’s oversight. This collaborative approach fosters strong customer links at all levels of the organization and effectively institutionalizes customer relationships beyond the executive suite. We promote a “Safety First” culture, which has led to a Total Recordable Incident Rate, or TRIR, well below industry averages. For example, for the year ended December 31, 2016, we had a TRIR of 0.9, compared to a peer average of 2.5 for the year ended December 31, 2014.

Business Strategies

We intend to achieve our primary business objective through the following business strategies:

• Capture an increasing share of rising demand for hydraulic fracturing services in the Permian Basin. We intend to continue to position ourselves as a Permian Basin‑focused hydraulic fracturing business, as we believe the Permian Basin hydraulic fracturing market offers supportive long‑term growth fundamentals. These fundamentals are characterized by increased demand for our HHP, driven by increasing drilling activity and well completion intensity levels, along with underinvestment by our competitors in their equipment. We are currently operating at 100% utilization, and several of our customers have requested additional HHP capacity from us. As our customers continue to develop their assets in the Midland Basin and Delaware Basin, we believe we are strategically positioned to deploy additional hydraulic fracturing equipment in support of their ongoing needs. Further, we have contracted to purchase one new additional hydraulic fracturing unit, which is expected to be delivered before the end of the first quarter of 2018. This unit will provide us with an additional 45,000 HHP, bringing our total capacity to 735,000 HHP.

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• Capitalize on improving pricing and efficiency gains. The increase in demand for HHP coupled with expected competitor equipment attrition is expected to drive more favorable hydraulic fracturing supply and demand fundamentals. We believe this market tightening may lead to a general increase in prices for hydraulic fracturing services. Furthermore, our consistently high fleet utilization levels and 24 hours per day, seven days per week operating schedule (with approximately 90% of our fleet currently operating on such a schedule, as compared to 2014, when the majority of our services were provided during daylight hours) should result in greater revenue opportunity and enhanced margins as fixed costs are spread over a broader revenue base. We believe that any incremental future fleet additions will benefit from these trends and associated economies of scale.

• Cross‑sell our complementary services. In addition to our hydraulic fracturing services, we offer a broad range of complementary services in support of our customers’ development activities, including cementing, acidizing, coiled tubing, flowback services and surface air drilling. These complementary services create operational efficiencies for our customers, and allow us to capture a greater percentage of their capital spending across the lifecycle of an unconventional well. We believe that, as our customers increase spending levels, we are well positioned to continue cross‑selling and growing our complementary service offerings.

• Maintain financial stability and flexibility to pursue growth opportunities. Consistent with our historical practices, we plan to continue to maintain a conservative balance sheet, which will allow us to better react to potential changes in industry and market conditions and opportunistically grow our business. In the near term, we intend to continue our past practice of aligning our growth capital expenditures with visible customer demand, by strategically deploying new equipment on a long‑term, dedicated basis in response to inbound customer requests. We will also selectively evaluate potential strategic acquisitions that increase our scale and capabilities or diversify our operations.

Risk Factors

Investing in our common stock involves risks. You should carefully read the section of this prospectus entitled “Risk Factors” beginning on page 11 and the other information in this prospectus for an explanation of these risks before investing in our common stock.

Principal Executive Offices and Internet Address

Our principal executive offices are located at 1706 S. Midkiff, Bldg. B, Midland, Texas 79701, and our telephone number is (432) 688‑0012. Our website is located at http://www.propetroservices.com. We make our periodic reports and other information filed with or furnished to the Securities and Exchange Commission, or the SEC, available, free of charge, through our website, as soon as reasonably practicable after those reports and other information are electronically filed with or furnished to the SEC. Information on our website or any other website is not incorporated by reference into this prospectus and does not constitute a part of this prospectus.

Our Emerging Growth Company Status

As a company with less than $1.07 billion in revenue during our last fiscal year, we qualify as an “emerging growth company” as defined in the Jumpstart Our Business Startups Act of 2012, or the JOBS Act. As an emerging growth company, we may, for up to five years, take advantage of specified exemptions from reporting and other regulatory requirements that are otherwise applicable generally to public companies. These exemptions include:

• the presentation of only two years of audited financial statements and only two years of related Management’s Discussion and Analysis of Financial Condition and Results of Operations in this prospectus;

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• deferral of the auditor attestation requirement on the effectiveness of our system of internal control over financial reporting;

• exemption from the adoption of new or revised financial accounting standards until they would apply to private companies;

• exemption from compliance with any new requirements adopted by the Public Company Accounting Oversight Board requiring mandatory audit firm rotation or a supplement to the auditor’s report in which the auditor would be required to provide additional information about the audit and the financial statements of the issuer; and

• reduced disclosure about executive compensation arrangements.

We may take advantage of these provisions until we are no longer an emerging growth company, which will occur on the earliest of (i) the last day of the fiscal year following the fifth anniversary of the consummation of our initial public offering (“IPO”), (ii) the last day of the fiscal year in which we have more than $1.07 billion in annual revenue, (iii) the date on which we issue more than $1.0 billion of non‑convertible debt over a three‑year period and (iv) the date on which we are deemed to be a “large accelerated filer,” as defined in Rule 12b‑2 promulgated under the Securities Exchange Act of 1934, as amended, or the Exchange Act.

We have elected to take advantage of all of the applicable JOBS Act provisions, except that we have elected to opt out of the exemption that allows emerging growth companies to extend the transition period for complying with new or revised financial accounting standards (this election is irrevocable). Accordingly, the information that we provide you may be different than what you may receive from other public companies in which you hold equity interests.

Recent Developments

Initial Public Offering. On March 16, 2017, the registration statement on Form S-1 (File No. 333-215940) relating to our initial public offering (the “IPO”) was declared effective by the SEC. The IPO closed on March 22, 2017, at which time we issued and sold 13,250,000 shares of common stock, and certain selling shareholders sold 11,750,000 shares of common stock, at a price to the public of $14.00 per share. We received cash proceeds of approximately $170.1 million from this transaction, net of underwriting discounts and commissions and offering expenses, which we used (i) to repay $71.8 million in outstanding borrowings and accrued interest under our term loan, (ii) for the purchase of additional hydraulic fracturing fleets and ancillary equipment, and (iii) retained the balance for general corporate purposes.

In connection with the IPO, the Company executed a stock split, such that each holder of common stock of the Company received 1.45 shares of common stock for every one share of previous common stock. Accordingly, any information related to or dependent upon the share or option counts in our comparative 2016 and 2015 consolidated financial statements have been updated to reflect the effect of the stock split.

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THE OFFERING

Common stock offered by the selling shareholders	10,000,000 shares (or 11,500,000 shares if Goldman Sachs & Co. LLC exercises its option to purchase additional shares in full).
Common stock outstanding prior to and after this offering	83,039,854 shares.
Option to purchase additional shares	The selling shareholders have granted Goldman Sachs & Co. LLC a 30-day option to purchase up to an aggregate of 1,500,000 additional shares of our common stock to cover over-allotments.
Use of proceeds	We will not receive any of the proceeds from the sale of shares of our common stock by the selling shareholders pursuant to this prospectus.
Dividend policy	We do not anticipate paying any cash dividends on our common stock. Please read “Dividend Policy.”
Trading symbol	Our common stock is listed on the NYSE under the symbol “PUMP.”
Risk factors	You should carefully read and consider the information set forth under the heading “Risk Factors” and all other information set forth in this prospectus before deciding to invest in our common stock.

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Summary Historical Consolidated Financial Statements

The following table presents summary historical financial and operating data of ProPetro Holding Corp. as of the dates and for the years indicated. The summary historical financial data as of and for the years ended December 31, 2016 and 2015 are derived from the audited consolidated financial statements appearing elsewhere in this prospectus. The summary historical interim financial data as of September 30, 2017 and for the nine months ended September 30, 2017 and 2016, are derived from the unaudited interim financial statements appearing elsewhere in this prospectus. Historical results are not necessarily indicative of future results.

We conduct our business through seven operating segments: hydraulic fracturing, cementing, acidizing, coil tubing, flowback, surface drilling and Permian drilling. For reporting purposes, the hydraulic fracturing, cementing and acidizing operating segments are aggregated into our one reportable segment: pressure pumping. The selected historical consolidated financial and operating data presented below should be read in conjunction with “Risk Factors,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements and the related notes and other financial data included elsewhere in this prospectus.

	For the Nine Months Ended September 30,						For the Year Ended December 31,
(In thousands, except for per share data and percentages)	2017			2016			2016			2015
Statement of Operations Data:
Revenue	$	668,153		$	272,999		$	436,920		$	569,618
Pressure pumping	639,355			251,410			409,014			510,198
All other	28,798			21,589			27,906			59,420
Costs and Expenses:
Cost of services(1)	551,775			255,362			404,140			483,338
General and administrative(2)	38,881			17,197			26,613			27,370
Depreciation and amortization	38,602			32,669			43,542			50,134
Property and equipment impairment expense	—			—			6,305			36,609
Goodwill impairment expense	—			—			1,177			—
Loss on disposal of assets	28,971			12,859			22,529			21,268
Total costs and expenses	$	658,229		$	318,087		$	504,306		$	618,719
Operating Income (Loss)	$	9,924		$	(45,088	)	$	(67,386	)	$	(49,101	)
Other Income (Expense):
Interest expense	(6,469		)	(15,924		)	(20,387		)	(21,641		)
Gain on extinguishment of debt	—			6,975			6,975			—
Other expense	(792		)	(419		)	(321		)	(499		)
Total other expense	$	(7,261	)	$	(9,386	)	$	(13,733	)	$	(22,140	)
Income (loss) before income taxes	2,663			(54,747		)	(81,119		)	(71,241		)
Income tax (expense)/benefit	(128		)	18,644			27,972			25,388
Net income (loss)	$	2,535		$	(35,830	)	$	(53,147	)	$	(45,853	)
Per Share Information
Net income (loss) per common share:
Basic	$	0.03		$	(0.84	)	$	(1.19	)	$	(1.31	)
Diluted	$	0.03		$	(0.84	)	$	(1.19	)	$	(1.31	)

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	For the Nine Months Ended September 30,						For the Year Ended December 31,
(In thousands, except for per share data and percentages)	2017			2016			2016			2015
Weighted average common shares outstanding:
Basic	74,124			42,526			44,787			34,993
Diluted	77,118			42,526			44,787			34,993
Balance Sheet Data as of:
Cash and cash equivalents	$	51,008					$	133,596		$	34,310
Property and equipment - net of accumulated depreciation	$	399,268					$	263,862		$	291,838
Total assets	$	638,591					$	541,422		$	446,454
Long-term debt - net of deferred loan costs	$	34,476					$	159,407		$	236,876
Total shareholders’ equity	$	402,415					$	221,009		$	69,571
Cash Flow Statement Data:
Net cash provided by (used in) operating activities	$	78,673		$	(5,652	)	$	10,658		$	81,231
Net cash used in investing activities	$	(189,583	)	$	(18,156	)	$	(41,688	)	$	(62,776	)
Net cash provided by (used in) financing activities	$	28,322		$	(5,214	)	$	130,315		$	(15,216	)
Other Data:
Adjusted EBITDA(3)	$	94,655		$	1,570		$	7,816		$	60,149
Adjusted EBITDA margin(3)	14.17		%	0.58		%	1.80		%	10.60		%
Capital expenditures	$	206,328		$	21,894		$	46,008		$	71,677

____________________

(1) Exclusive of depreciation and amortization.

(2) Inclusive of stock-based compensation.

(3) We view Adjusted EBITDA and Adjusted EBITDA margin as important indicators of performance. We define EBITDA as our net income, before (i) interest expense, (ii) income taxes and (iii) depreciation and amortization. We define Adjusted EBITDA as EBITDA, plus (i) loss on disposal of assets, (ii) gain on extinguishment of debt, (iii) stock based compensation, and (iv) other unusual or non-recurring charges, such as costs related to our initial public offering. Adjusted EBITDA margin reflects our Adjusted EBITDA as a percentage of our revenues.

EBITDA, Adjusted EBITDA and Adjusted EBITDA margin are supplemental measures utilized by our management and other users of our financial statements such as investors, commercial banks, research analysts and others, to assess our financial performance because it allows us to compare our operating performance on a consistent basis across periods by removing the effects of our capital structure (such as varying levels of interest expense), asset base (such as depreciation and amortization) and items outside the control of our management team (such as income tax rates). EBITDA, Adjusted EBITDA and Adjusted EBITDA margin have limitations as analytical tools and should not be considered as an alternative to net income, operating income, cash flow from operating activities or any other measure of financial performance presented in accordance with GAAP.

We believe that our presentation of EBITDA, Adjusted EBITDA and Adjusted EBITDA margin will provide useful information to investors in assessing our financial condition and results of operations. Net income is the GAAP measure most directly comparable to EBITDA, Adjusted EBITDA and Adjusted EBITDA margin. EBITDA, Adjusted EBITDA and Adjusted EBITDA margin should not be considered alternatives to net income presented in accordance with GAAP. Because EBITDA, Adjusted EBITDA and Adjusted EBITDA margin may be defined differently by other companies in our industry, our definition of

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EBITDA, Adjusted EBITDA and Adjusted EBITDA margin may not be comparable to similarly titled measures of other companies, thereby diminishing its utility. The following table presents a reconciliation of net loss to EBITDA, Adjusted EBITDA and Adjusted EBITDA margin for each of the years indicated.

Reconciliation of net income (loss) to Adjusted EBITDA

	For the Nine Months Ended September 30,						For the Year Ended December 31,
($ in thousands, except percentages)	2017			2016			2016			2015
Net income (loss)	$	2,535		$	(35,830	)	$	(53,147	)	$	(45,853	)
Interest expense	6,469			15,942			20,387			21,641
Income tax (benefit) expense	128			(18,644		)	(27,972		)	(25,388		)
Depreciation and amortization	38,602			32,669			43,542			50,134
EBITDA	$	47,734		$	(5,863	)	$	(17,190	)	$	534
Property and equipment impairment expense	—			—			6,305			36,609
Goodwill impairment expense	—			—			1,177			—
Loss on disposal of assets	28,971			12,859			22,529			21,268
Gain on extinguishment of debt	—			(6,975		)	(6,975		)	—
Stock-based compensation	8,730			1,130			1,649			1,239
Other expense	792			419			321			499
Other general and administrative expense(1)	722			—			—			—
Deferred IPO bonus expense	7,706			—			—			—
Adjusted EBITDA	94,655			1,570			7,816			60,149
Revenue	$	668,153		$	272,999		$	436,920		$	569,618
Adjusted EBITDA margin	14.17		%	0.58		%	1.80		%	10.60		%

____________________

(1) Other general and administrative expense relates to legal settlement expense.

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RISK FACTORS

Investing in shares of our common stock involves a high degree of risk. You should carefully consider the risks described below with all of the other information included in this prospectus and the documents and other information incorporated by reference herein before deciding to invest in shares of our common stock. If any of the following risks were to occur, our business, financial condition, results of operations and cash flows could be materially adversely affected. In that case, the trading price of our common stock could decline and you could lose all or part of your investment.

Risks Inherent in Our Business

Our business and financial performance depends on the oil and natural gas industry and particularly on the level of capital spending and exploration and production activity within the United States and in the Permian Basin, and a decline in prices for oil and natural gas may have an adverse effect on our revenue, cash flows, profitability and growth.

Demand for most of our services depends substantially on the level of capital expenditures in the Permian Basin by companies in the oil and natural gas industry. As a result, our operations are dependent on the levels of capital spending and activity in oil and gas exploration, development and production. A prolonged reduction in oil and gas prices would generally depress the level of oil and natural gas exploration, development, production, and well completion activity and would result in a corresponding decline in the demand for the hydraulic fracturing services that we provide. The significant decline in oil and natural gas prices beginning in late 2014 caused a reduction in our customers’ spending and associated drilling and completion activities, which had an adverse effect on our revenue. If prices were to decline, similar declines in our customers’ spending would have an adverse effect on our revenue. In addition, a worsening of these conditions may result in a material adverse impact on certain of our customers’ liquidity and financial position resulting in further spending reductions, delays in the collection of amounts owing to us and similar impacts.

Many factors over which we have no control affect the supply of and demand for, and our customers’ willingness to explore, develop and produce oil and natural gas, and therefore, influence prices for our services, including:

• the domestic and foreign supply of, and demand for, oil and natural gas;

• the level of prices, and expectations about future prices, of oil and natural gas;

• the level of global oil and natural gas exploration and production;

• the cost of exploring for, developing, producing and delivering oil and natural gas;

• the supply of and demand for drilling and hydraulic fracturing equipment;

• the expected decline rates of current production;

• the price and quantity of foreign imports;

• political and economic conditions in oil and natural gas producing countries and regions, including the United States, the Middle East, Africa, South America and Russia;

• actions by the members of Organization of Petroleum Exporting Countries with respect to oil production levels and announcements of potential changes in such levels;

• speculative trading in crude oil and natural gas derivative contracts;

• the level of consumer product demand;

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• the discovery rates of new oil and natural gas reserves;

• contractions in the credit market;

• the strength or weakness of the U.S. dollar;

• available pipeline and other transportation capacity;

• the levels of oil and natural gas storage;

• weather conditions and other natural disasters;

• domestic and foreign tax policy;

• domestic and foreign governmental approvals and regulatory requirements and conditions;

• the continued threat of terrorism and the impact of military and other action, including military action in the Middle East;

• technical advances affecting energy consumption;

• the proximity and capacity of oil and natural gas pipelines and other transportation facilities;

• the price and availability of alternative fuels;

• the ability of oil and natural gas producers to raise equity capital and debt financing;

• merger and divestiture activity among oil and natural gas producers; and

• overall domestic and global economic conditions.

These factors and the volatility of the energy markets make it extremely difficult to predict future oil and natural gas price movements with any certainty. Such a decline would have a material adverse effect on our business, results of operation and financial condition.

The cyclical nature of the oil and natural gas industry may cause our operating results to fluctuate.

We derive our revenues from companies in the oil and natural gas exploration and production industry, a historically cyclical industry with levels of activity that are significantly affected by the levels and volatility of oil and natural gas prices. We have experienced, and may in the future experience, significant fluctuations in operating results as a result of the reactions of our customers to changes in oil and natural gas prices. For example, prolonged low commodity prices experienced by the oil and natural gas industry during 2015 and 2016, combined with adverse changes in the capital and credit markets, caused many exploration and production companies to reduce their capital budgets and drilling activity. This resulted in a significant decline in demand for oilfield services and adversely impacted the prices oilfield services companies could charge for their services. In addition, a majority of the service revenue we earn is based upon a charge for a relatively short period of time (for example, a day, a week or a month) for the actual period of time the service is provided to our customers. By contracting services on a short‑term basis, we are exposed to the risks of a rapid reduction in market prices and utilization and resulting volatility in our revenues.

The majority of our operations are located in the Permian Basin, making us vulnerable to risks associated with operating in one major geographic area.

Our operations are geographically concentrated in the Permian Basin. For each of the nine months ended September 30, 2017 and the year ended December 31, 2016, approximately 97% of our revenues were attributable to our operations in the Permian Basin. As a result of this concentration, we may be

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disproportionately exposed to the impact of regional supply and demand factors, delays or interruptions of production from wells in the Permian Basin caused by significant governmental regulation, processing or transportation capacity constraints, market limitations, curtailment of production or interruption of the processing or transportation of oil and natural gas produced from the wells in these areas. In addition, the effect of fluctuations on supply and demand may become more pronounced within specific geographic oil and natural gas producing areas such as the Permian Basin, which may cause these conditions to occur with greater frequency or magnify the effects of these conditions. Due to the concentrated nature of our operations, we could experience any of the same conditions at the same time, resulting in a relatively greater impact on our revenue than they might have on other companies that have more geographically diverse operations.

We are exposed to the credit risk of our customers, and any material nonpayment or nonperformance by our customers could adversely affect our business, results of operations and financial condition.

We are subject to the risk of loss resulting from nonpayment or nonperformance by our customers. Our credit procedures and policies may not be adequate to fully eliminate customer credit risk. If we fail to adequately assess the creditworthiness of existing or future customers or unanticipated deterioration in their creditworthiness, any resulting increase in nonpayment or nonperformance by them and our inability to re‑market or otherwise use the production could have a material adverse effect on our business, results of operations and financial condition. The decline and volatility in oil and natural gas prices over the last two years has negatively impacted the financial condition of our customers and further declines, sustained lower prices, or continued volatility could impact their ability to meet their financial obligations to us.

We face significant competition that may cause us to lose market share.

The oilfield services industry is highly competitive and has relatively few barriers to entry. The principal competitive factors impacting sales of our services are price, reputation and technical expertise, equipment and service quality and health and safety standards. The market is also fragmented and includes numerous small companies capable of competing effectively in our markets on a local basis, as well as several large companies that possess substantially greater financial and other resources than we do. Our larger competitors’ greater resources could allow those competitors to compete more effectively than we can. For instance, our larger competitors may offer services at below‑market prices or bundle ancillary services at no additional cost our customers. We compete with large national and multi‑national companies that have longer operating histories, greater financial, technical and other resources and greater name recognition than we do. Several of our competitors provide a broader array of services and have a stronger presence in more geographic markets. In addition, we compete with several smaller companies capable of competing effectively on a regional or local basis.

Some jobs are awarded on a bid basis, which further increases competition based on price. Pricing is often the primary factor in determining which qualified contractor is awarded a job. The competitive environment may be further intensified by mergers and acquisitions among oil and natural gas companies or other events that have the effect of reducing the number of available customers. As a result of competition, we may lose market share or be unable to maintain or increase prices for our present services or to acquire additional business opportunities, which could have a material adverse effect on our business, financial condition, results of operations and cash flows.

Our competitors may be able to respond more quickly to new or emerging technologies and services and changes in customer requirements. The amount of equipment available may exceed demand, which could result in active price competition. In addition, depressed commodity prices lower demand for hydraulic fracturing equipment, which results in excess equipment and lower utilization rates. In addition, some exploration and production companies have commenced completing their wells using their own hydraulic fracturing equipment and personnel. Any increase in the development and utilization of in‑house fracturing capabilities by our customers could decrease the demand for our services and have a material adverse impact on our business.

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In addition, competition among oilfield service and equipment providers is affected by each provider’s reputation for safety and quality. We cannot assure that we will be able to maintain our competitive position.

Our business depends upon our ability to obtain specialized equipment, parts and key raw materials, including frac sand and chemicals, from third‑party suppliers, and we may be vulnerable to delayed deliveries and future price increases.

We purchase specialized equipment, parts and raw materials (including, for example, frac sand, chemicals and fluid ends) from third party suppliers and affiliates. At times during the business cycle, there is a high demand for hydraulic fracturing and other oil field services and extended lead times to obtain equipment and raw materials needed to provide these services. Should our current suppliers be unable or unwilling to provide the necessary equipment, parts or raw materials or otherwise fail to deliver the products timely and in the quantities required, any resulting delays in the provision of our services could have a material adverse effect on our business, financial condition, results of operations and cash flows. In addition, future price increases for this type of equipment, parts and raw materials could negatively impact our ability to purchase new equipment, to update or expand our existing fleet, to timely repair equipment in our existing fleet or meet the current demands of our customers.

Reliance upon a few large customers may adversely affect our revenue and operating results.

The majority of our revenue is generated from our hydraulic fracturing services. Due to the large percentage of our revenue historically derived from our hydraulic fracturing services with recurring customers and the limited availability of our fracturing units, we have had some degree of customer concentration. Our top ten customers represented approximately 70% and 83% of our consolidated revenue for the years ended December 31, 2015 and 2016, respectively. It is likely that we will depend on a relatively small number of customers for a significant portion of our revenue in the future. If a major customer fails to pay us, revenue would be impacted and our operating results and financial condition could be harmed. Additionally, if we were to lose any material customer, we may not be able to redeploy our equipment at similar utilization or pricing levels and such loss could have an adverse effect on our business until the equipment is redeployed at similar utilization or pricing levels.

Certain of our completion services, particularly our hydraulic fracturing services, are substantially dependent on the availability of water. Restrictions on our or our customers’ ability to obtain water may have an adverse effect on our financial condition, results of operations and cash flows.

Water is an essential component of unconventional shale oil and natural gas production during both the drilling and hydraulic fracturing processes. Over the past several years, certain of the areas in which we and our customers operate have experienced extreme drought conditions and competition for water in such areas is growing. In addition, some state and local governmental authorities have begun to monitor or restrict the use of water subject to their jurisdiction for hydraulic fracturing to ensure adequate local water supply. For instance, some states require E&P companies to report certain information regarding the water they use for hydraulic fracturing and to monitor the quality of groundwater surrounding some wells stimulated by hydraulic fracturing. Generally, our water requirements are met by our customers from sources on or near their sites, but there is no assurance that our customers will be able to obtain a sufficient supply of water from sources in these areas. Our or our customers’ inability to obtain water from local sources or to effectively utilize flowback water could have an adverse effect on our financial condition, results of operations and cash flows.

We rely on a few key employees whose absence or loss could adversely affect our business.

Many key responsibilities within our business have been assigned to a small number of employees. The loss of their services could adversely affect our business. In particular, the loss of the services of one or more members of our executive team, including our Chief Executive Officer, Chief Operating Officer and Chief Financial Officer, could disrupt our operations. We do not maintain “key person” life insurance

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policies on any of our employees. As a result, we are not insured against any losses resulting from the death of our key employees.

If we are unable to employ a sufficient number of skilled and qualified workers, our capacity and profitability could be diminished and our growth potential could be impaired.

The delivery of our services requires skilled and qualified workers with specialized skills and experience who can perform physically demanding work. As a result of the volatility of the oilfield services industry and the demanding nature of the work, workers may choose to pursue employment in fields that offer a more desirable work environment at wage rates that are competitive. Our ability to be productive and profitable will depend upon our ability to employ and retain skilled workers. In addition, our ability to expand our operations depends in part on our ability to increase the size of our skilled labor force. The demand for skilled workers is high, and the supply is limited. As a result, competition for experienced oilfield service personnel is intense, and we face significant challenges in competing for crews and management with large and well‑established competitors. A significant increase in the wages paid by competing employers could result in a reduction of our skilled labor force, increases in the wage rates that we must pay, or both. If either of these events were to occur, our capacity and profitability could be diminished and our growth potential could be impaired.

Our operations require substantial capital and we may be unable to obtain needed capital or financing on satisfactory terms or at all, which could limit our ability to grow.

The oilfield services industry is capital intensive. In conducting our business and operations, we have made, and expect to continue to make, substantial capital expenditures. Our total capital expenditures were approximately $46 million for the year ended December 31, 2016 and approximately $206 million for the nine months ended September 30, 2017. We have historically financed capital expenditures primarily with funding from cash generated by operations, equipment and vendor financing and borrowings under our credit facilities. Following our IPO, we intend to finance our capital expenditures primarily with cash on hand, cash flow from operations and borrowings under our revolving credit facility. We may be unable to generate sufficient cash from operations and other capital resources to maintain planned or future levels of capital expenditures which, among other things, may prevent us from acquiring new equipment or properly maintaining our existing equipment. Further, any disruptions or continuing volatility in the global financial markets may lead to an increase in interest rates or a contraction in credit availability impacting our ability to finance our operations. This could put us at a competitive disadvantage or interfere with our growth plans. Further, our actual capital expenditures for 2017 or future years could exceed our capital expenditure budget. In the event our capital expenditure requirements at any time are greater than the amount we have available, we could be required to seek additional sources of capital, which may include debt financing, joint venture partnerships, sales of assets, offerings of debt or equity securities or other means. We may not be able to obtain any such alternative source of capital. We may be required to curtail or eliminate contemplated activities. If we can obtain alternative sources of capital, the terms of such alternative may not be favorable to us. In particular, the terms of any debt financing may include covenants that significantly restrict our operations. Our inability to grow as planned may reduce our chances of maintaining and improving profitability.

Concerns over general economic, business or industry conditions may have a material adverse effect on our results of operations, liquidity and financial condition.

Concerns over global economic conditions, geopolitical issues, interest rates, inflation, the availability and cost of credit and the United States and foreign financial markets have contributed to increased economic uncertainty and diminished expectations for the global economy. These factors, combined with volatility in commodity prices, business and consumer confidence and unemployment rates, have precipitated an economic slowdown. Concerns about global economic growth have had a significant adverse impact on global financial markets and commodity prices. If the economic climate in the United States or abroad deteriorates, worldwide demand for petroleum products could diminish further, which could impact the price at which oil, natural gas and natural gas liquids can be sold, which could affect the

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ability of our customers to continue operations and ultimately adversely impact our results of operations, liquidity and financial condition.

Our indebtedness and liquidity needs could restrict our operations and make us more vulnerable to adverse economic conditions.

Our existing and future indebtedness, whether incurred in connection with acquisitions, operations or otherwise, may adversely affect our operations and limit our growth, and we may have difficulty making debt service payments on such indebtedness as payments become due. Our level of indebtedness may affect our operations in several ways, including the following:

• increasing our vulnerability to general adverse economic and industry conditions;

• the covenants that are contained in the agreements governing our indebtedness could limit our ability to borrow funds, dispose of assets, pay dividends and make certain investments;

• our debt covenants could also affect our flexibility in planning for, and reacting to, changes in the economy and in our industry;

• any failure to comply with the financial or other debt covenants, including covenants that impose requirements to maintain certain financial ratios, could result in an event of default, which could result in some or all of our indebtedness becoming immediately due and payable;

• our level of debt could impair our ability to obtain additional financing, or obtain additional financing on favorable terms, in the future for working capital, capital expenditures, acquisitions or other general corporate purposes; and

• our business may not generate sufficient cash flow from operations to enable us to meet our obligations under our indebtedness.

Restrictions in our revolving credit facility (as defined herein) and any future financing agreements may limit our ability to finance future operations or capital needs or capitalize on potential acquisitions and other business opportunities.

The operating and financial restrictions and covenants in our revolving credit facility and any future financing agreements could restrict our ability to finance future operations or capital needs or to expand or pursue our business activities. For example, our revolving credit facility restricts or limits our ability to:

• grant liens;

• incur additional indebtedness;

• engage in a merger, consolidation or dissolution;

• enter into transactions with affiliates;

• sell or otherwise dispose of assets, businesses and operations;

• materially alter the character of our business as currently conducted; and

• make acquisitions, investments and capital expenditures.

Furthermore, our revolving credit facility contains certain other operating and financial covenants. Our ability to comply with the covenants and restrictions contained in the revolving credit facility may be affected by events beyond our control, including prevailing economic, financial and industry conditions. If market or other economic conditions deteriorate, our ability to comply with these covenants may be impaired. If we violate any of the restrictions, covenants, ratios or tests in our revolving credit facility, a

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significant portion of our indebtedness may become immediately due and payable, our lenders’ commitment to make further loans to us may terminate. We might not have, or be able to obtain, sufficient funds to make these accelerated payments. Any subsequent replacement of our revolving credit facility or any new indebtedness could have similar or greater restrictions. Please read “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Credit Facility and Other Financing Arrangements .”

Our operations are subject to unforeseen interruptions and hazards inherent in the oil and natural gas industry, for which we may not be adequately insured and which could cause us to lose customers and substantial revenue.

Our operations are exposed to the risks inherent to our industry, such as equipment defects, vehicle accidents, fires, explosions, blowouts, surface cratering, uncontrollable flows of gas or well fluids, pipe or pipeline failures, abnormally pressured formations and various environmental hazards, such as oil spills and releases of, and exposure to, hazardous substances. For example, our operations are subject to risks associated with hydraulic fracturing, including any mishandling, surface spillage or potential underground migration of fracturing fluids, including chemical additives. In addition, our operations are exposed to potential natural disasters, including blizzards, tornadoes, storms, floods, other adverse weather conditions and earthquakes. The occurrence of any of these events could result in substantial losses to us due to injury or loss of life, severe damage to or destruction of property, natural resources and equipment, pollution or other environmental damage, clean‑up responsibilities, regulatory investigations and penalties or other damage resulting in curtailment or suspension of our operations. The cost of managing such risks may be significant. The frequency and severity of such incidents will affect operating costs, insurability and relationships with customers, employees and regulators. In particular, our customers may elect not to purchase our services if they view our environmental or safety record as unacceptable, which could cause us to lose customers and substantial revenues.

Our insurance may not be adequate to cover all losses or liabilities we may suffer. Furthermore, we may be unable to maintain or obtain insurance of the type and amount we desire at reasonable rates. As a result of market conditions, premiums and deductibles for certain of our insurance policies have increased and could escalate further. In addition, sub‑limits have been imposed for certain risks. In some instances, certain insurance could become unavailable or available only for reduced amounts of coverage. If we were to incur a significant liability for which we are not fully insured, it could have a material adverse effect on our business, results of operations and financial condition. In addition, we may not be able to secure additional insurance or bonding that might be required by new governmental regulations. This may cause us to restrict our operations, which might severely impact our financial position.

Since hydraulic fracturing activities are part of our operations, they are covered by our insurance against claims made for bodily injury, property damage and clean‑up costs stemming from a sudden and accidental pollution event. However, we may not have coverage if we are unaware of the pollution event and unable to report the “occurrence” to our insurance company within the time frame required under our insurance policy. In addition, these policies do not provide coverage for all liabilities, and the insurance coverage may not be adequate to cover claims that may arise, or we may not be able to maintain adequate insurance at rates we consider reasonable. A loss not fully covered by insurance could have a material adverse effect on our financial position, results of operations and cash flows.

A terrorist attack or armed conflict could harm our business.

Terrorist activities, anti‑terrorist efforts and other armed conflicts involving the United States could adversely affect the U.S. and global economies and could prevent us from meeting financial and other obligations. We could experience loss of business, delays or defaults in payments from payors or disruptions of fuel supplies and markets if pipelines, production facilities, processing plants, refineries or transportation facilities are direct targets or indirect casualties of an act of terror or war. Such activities could reduce the overall demand for oil and natural gas, which, in turn, could also reduce the demand for our services. Terrorist activities and the threat of potential terrorist activities and any resulting economic

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downturn could adversely affect our results of operations, impair our ability to raise capital or otherwise adversely impact our ability to realize certain business strategies.

Increasing trucking regulations may increase our costs and negatively impact our results of operations.

In connection with our business operations, including the transportation and relocation of our hydraulic fracking equipment and shipment of frac sand, we operate trucks and other heavy equipment. As such, we operate as a motor carrier in providing certain of our services and therefore are subject to regulation by the United States Department of Transportation and by various state agencies. These regulatory authorities exercise broad powers, governing activities such as the authorization to engage in motor carrier operations, driver licensing, insurance requirements, financial reporting and review of certain mergers, consolidations and acquisitions, and transportation of hazardous materials (HAZMAT). Our trucking operations are subject to possible regulatory and legislative changes that may increase our costs. Some of these possible changes include increasingly stringent environmental regulations, changes in the hours of service regulations which govern the amount of time a driver may drive or work in any specific period, onboard black box recorder device requirements or limits on vehicle weight and size.

Interstate motor carrier operations are subject to safety requirements prescribed by the United States Department of Transportation. To a large degree, intrastate motor carrier operations are subject to state safety regulations that mirror federal regulations. Matters such as the weight and dimensions of equipment are also subject to federal and state regulations. From time to time, various legislative proposals are introduced, including proposals to increase federal, state, or local taxes, including taxes on motor fuels, which may increase our costs or adversely impact the recruitment of drivers. We cannot predict whether, or in what form, any increase in such taxes applicable to us will be enacted.

Certain motor vehicle operators require registration with the Department of Transportation. This registration requires an acceptable operating record. The Department of Transportation periodically conducts compliance reviews and may revoke registration privileges based on certain safety performance criteria that could result in a suspension of operations.

We are subject to environmental laws and regulations, and future compliance, claims, and liabilities relating to such matters may have a material adverse effect on our results of operations, financial position or cash flows.

The nature of our operations, including the handling, transporting and disposing of a variety of fluids and substances, including hydraulic fracturing fluids and other regulated substances, air emissions, and wastewater discharges exposes us to some risks of environmental liability, including the release of pollutants from oil and natural gas wells and associated equipment to the environment. The cost of compliance with these laws can be significant. Failure to properly handle, transport or dispose of these materials or otherwise conduct our operations in accordance with these and other environmental laws could expose us to substantial liability for administrative, civil and criminal penalties, cleanup and site restoration costs and liability associated with releases of such materials, damages to natural resources and other damages, as well as potentially impair our ability to conduct our operations. Such liability is commonly on a strict, joint and several liability basis, without regard to fault. Liability may be imposed as a result of our conduct that was lawful at the time it occurred or the conduct of, or conditions caused by, prior operators or other third parties. Neighboring landowners and other third parties may file claims against us for personal injury or property damage allegedly caused by the release of pollutants into the environment. Environmental laws and regulations have changed in the past, and they may change in the future and become more stringent. Current and future claims and liabilities may have a material adverse effect on us because of potential adverse outcomes, defense costs, diversion of management resources, unavailability of insurance coverage and other factors. The ultimate costs of these liabilities are difficult to determine and may exceed any reserves we may have established. If existing environmental requirements or enforcement policies change, we may be required to make significant unanticipated capital and operating expenditures.

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The adoption of climate change legislation or regulations restricting emissions of greenhouse gases could result in increased operating costs and reduced demand for oil and natural gas.

The EPA has determined that greenhouse gases (“GHGs”) present an endangerment to public health and the environment because such gases contribute to warming of the earth’s atmosphere and other climatic changes. Based on these findings, the EPA has adopted and implemented, and continues to adopt and implement, regulations that restrict emissions of GHGs under existing provisions of the Clean Air Act (“CAA”). The EPA also requires the annual reporting of GHG emissions from certain large sources of GHG emissions in the United States, including certain oil and gas production facilities. The EPA has also taken steps to limit methane emissions from oil and gas production facilities. In addition, the U.S. Congress has from time to time considered adopting legislation to reduce emissions of GHGs and almost one‑half of the states have already taken legal measures to reduce emissions of GHGs primarily through the planned development of GHG emission inventories and/or regional GHG cap and trade programs. And in December 2015, the United States joined the international community at the 21st Conference of the Parties of the United Nations Framework Convention on Climate Change in Paris, France. The resulting Paris Agreement calls for the parties to undertake “ambitious efforts” to limit the average global temperature, and to conserve and enhance sinks and reservoirs of greenhouse gases. The Paris Agreement entered into force in November 2016. On June 1, 2017, President Trump announced that the United States planned to withdraw from the Paris Agreement and to seek negotiations either to reenter the Paris Agreement on different terms or establish a new framework agreement. The Paris Agreement provides for a four‑year exit process beginning when it took effect in November 2016, which would resulting in an effective exit date of November 2020. The United States’ adherence to the exit process is uncertain and/or the terms on which the United States may reenter the Paris Agreement or a separately negotiated agreement are unclear at this time.

Moreover, climate change may cause more extreme weather conditions and increased volatility in seasonal temperatures. Extreme weather conditions can interfere with our operations and increase our costs, and damage resulting from extreme weather may not be fully insured.

Federal and state legislative and regulatory initiatives relating to hydraulic fracturing could result in increased costs and additional operating restrictions or delays.

Our hydraulic fracturing operations are a significant component of our business, and it is an important and common practice that is used to stimulate production of hydrocarbons, particularly oil and natural gas, from tight formations, including shales. The process, which involves the injection of water, sand and chemicals under pressure into formations to fracture the surrounding rock and stimulate production, is typically regulated by state oil and natural gas commissions. However, federal agencies have asserted regulatory authority over certain aspects of the process. For example, in May 2014, the EPA issued an Advanced Notice of Proposed Rulemaking seeking comment on the development of regulations under the Toxic Substances Control Act to require companies to disclose information regarding the chemicals used in hydraulic fracturing. Beginning in August 2012, the EPA issued a series of rules under the CAA that establish new emission control requirements for emissions of volatile organic compounds and methane from certain oil and natural gas production and natural gas processing operations and equipment. And in March 2015, the Bureau of Land Management (“BLM”) finalized a rule governing hydraulic fracturing on federal lands. In June 2016, a federal district court judge in Wyoming struck down the final rule, finding that the BLM lacked congressional authority to promulgate the rule. The BLM appealed that ruling. However, in July 2017, the BLM initiated a rulemaking to rescind the final rule and reinstate the regulations that existed immediately before the published effective date of the rule. In light of the BLM’s proposed rulemaking, in September 2017, the U.S. Court of Appeals for the Tenth Circuit dismissed the appeal and remanded with directions to vacate the lower court’s opinion, leaving the final rule in place. BLM’s current rulemaking is subject to public notice and comment, as well as judicial challenges. Further, legislation to amend the Safe Drinking Water Act to repeal the exemption for hydraulic fracturing (except when diesel fuels are used) from the definition of “underground injection” and require federal permitting and regulatory control of hydraulic fracturing, as well as legislative proposals to require disclosure of the chemical

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constituents of the fluids used in the fracturing process, have been proposed in recent sessions of Congress. Several states and local jurisdictions in which we or our customers operate also have adopted or are considering adopting regulations that could restrict or prohibit hydraulic fracturing in certain circumstances, impose more stringent operating standards and/or require the disclosure of the composition of hydraulic fracturing fluids.

More recently, federal and state governments have begun investigating whether the disposal of produced water into underground injection wells has caused increased seismic activity in certain areas. For example, in December 2016, the EPA released its final report regarding the potential impacts of hydraulic fracturing on drinking water resources, concluding that “water cycle” activities associated with hydraulic fracturing may impact drinking water resources under certain circumstances such as water withdrawals for fracturing in times or areas of low water availability, surface spills during the management of fracturing fluids, chemicals or produced water, injection of fracturing fluids into wells with inadequate mechanical integrity, injection of fracturing fluids directly into groundwater resources, discharge of inadequately treated fracturing wastewater to surface waters, and disposal or storage of fracturing wastewater in unlined pits. The results of these studies could lead federal and state governments and agencies to develop and implement additional regulations.

Increased regulation of hydraulic fracturing and related activities (whether as a result of the EPA study results or resulting from other factors) could subject us and our customers to additional permitting and financial assurance requirements, more stringent construction specifications, increased monitoring, reporting and recordkeeping obligations, and plugging and abandonment requirements. New requirements could result in increased operational costs for us and our customers, and reduce the demand for our services.

Conservation measures, commercial development and technological advances could reduce demand for oil and natural gas and our services.

Fuel conservation measures, alternative fuel requirements, increasing consumer demand for alternatives to oil and natural gas, technological advances in fuel economy and energy generation devices could reduce demand for oil and natural gas, resulting in reduced demand for oilfield services. The impact of the changing demand for oil and natural gas services and products may have a material adverse effect on our business, financial condition, results of operations and cash flows.

The commercial development of economically‑viable alternative energy sources and related products (such as electric vehicles, wind, solar, geothermal, tidal, fuel cells and biofuels) could have a similar effect. In addition, certain U.S. federal income tax deductions currently available with respect to oil and natural gas exploration and development, including the allowance of percentage depletion for oil and natural gas properties, may be eliminated as a result of proposed legislation. Any future decreases in the rate at which oil and natural gas reserves are discovered or developed, whether due to the passage of legislation, increased governmental regulation leading to limitations, or prohibitions on exploration and drilling activity, including hydraulic fracturing, or other factors, could have a material adverse effect on our business and financial condition, even in a stronger oil and natural gas price environment.

We may be subject to claims for personal injury and property damage, which could materially adversely affect our financial condition and results of operations.

We operate with most of our customers under master service agreements, or MSAs. We endeavor to allocate potential liabilities and risks between the parties in the MSAs. Generally, under our MSAs, including those relating to our hydraulic fracturing services, we assume responsibility for, including control and removal of, pollution or contamination which originates above surface and originates from our equipment or services. Our customer assumes responsibility for, including control and removal of, all other pollution or contamination which may occur during operations, including that which may result from seepage or any other uncontrolled flow of drilling fluids. We may have liability in such cases if we are negligent or commit willful acts. Generally, our customers also agree to indemnify us against claims arising

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from their employees’ personal injury or death to the extent that, in the case of our hydraulic fracturing operations, their employees are injured or their properties are damaged by such operations, unless resulting from our gross negligence or willful misconduct. Similarly, we generally agree to indemnify our customers for liabilities arising from personal injury to or death of any of our employees, unless resulting from gross negligence or willful misconduct of the customer. In addition, our customers generally agree to indemnify us for loss or destruction of customer‑owned property or equipment and in turn, we agree to indemnify our customers for loss or destruction of property or equipment we own. Losses due to catastrophic events, such as blowouts, are generally the responsibility of the customer. However, despite this general allocation of risk, we might not succeed in enforcing such contractual allocation, might incur an unforeseen liability falling outside the scope of such allocation or may be required to enter into an MSA with terms that vary from the above allocations of risk. Litigation arising from a catastrophic occurrence at a location where our equipment and services are being used may result in our being named as a defendant in lawsuits asserting large claims. As a result, we may incur substantial losses which could materially and adversely affect our financial condition and results of operation.

We are subject to cyber security risks. A cyber incident could occur and result in information theft, data corruption, operational disruption and/or financial loss.

The oil and natural gas industry has become increasingly dependent on digital technologies to conduct certain processing activities. For example, we depend on digital technologies to perform many of our services and process and record operational and accounting data. At the same time, cyber incidents, including deliberate attacks or unintentional events, have increased. The U.S. government has issued public warnings that indicate that energy assets might be specific targets of cyber security threats. Our technologies, systems and networks, and those of our vendors, suppliers and other business partners, may become the target of cyberattacks or information security breaches that could result in the unauthorized release, gathering, monitoring, misuse, loss or destruction of proprietary information, personal information and other data, or other disruption of our business operations. In addition, certain cyber incidents, such as unauthorized surveillance, may remain undetected for an extended period. Our systems and insurance coverage for protecting against cyber security risks, including cyberattacks, may not be sufficient and may not protect against or cover all of the losses we may experience as a result of the realization of such risks. As cyber incidents continue to evolve, we may be required to expend additional resources to continue to modify or enhance our protective measures or to investigate and remediate the effects of cyber incidents.

Risks Related to Ownership of Our Common Stock

The concentration of our capital stock ownership among our largest shareholders and their affiliates will limit your ability to influence corporate matters.

Prior to this offering, Energy Capital Partners owned approximately 41.6% of our outstanding common stock, and after giving effect to this offering, Energy Capital Partners will own approximately 29.5% of our outstanding common stock. Consequently, Energy Capital Partners has significant influence over all matters that require approval by our shareholders, including the election of directors and approval of significant corporate transactions. This concentration of ownership will limit your ability to influence corporate matters, and as a result, actions may be taken that you may not view as beneficial. Moreover, this concentration of stock ownership may also adversely affect the trading price of our common stock to the extent investors perceive a disadvantage in owning stock of a company with a significant shareholder.

Conflicts of interest could arise in the future between us, on the one hand, and Energy Capital Partners and its affiliates and affiliated funds, including its and their current and future portfolio companies, on the other hand, concerning among other things, potential competitive business activities or business opportunities.

Conflicts of interest could arise in the future between us, on the one hand, and Energy Capital Partners and its affiliates and affiliated funds, including its and their current and future portfolio companies,

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on the other hand, concerning among other things, potential competitive business activities or business opportunities. Energy Capital Partners and its affiliated funds are primarily North American investors in essential, long‑lived and capital intensive energy assets within a host of energy related industries. Energy Capital Partners and its affiliated funds currently have investments in companies that operate in the energy infrastructure and oilfield services industries. As a result, Energy Capital Partners and its affiliates’ and affiliated funds’ current and future portfolio companies which it controls may now, or in the future, directly or indirectly, compete with us for investment or business opportunities.

Our governing documents provide that Energy Capital Partners and its affiliates and affiliated funds (including portfolio investments of Energy Capital Partners and its affiliates and affiliated funds) are not restricted from owning assets or engaging in businesses that compete directly or indirectly with us and will not have any duty to refrain from engaging, directly or indirectly, in the same or similar business activities or lines of business as us, including those business activities or lines of business deemed to be competing with us, or doing business with any of our clients, customers or vendors. In particular, subject to the limitations of applicable law, our certificate of incorporation, among other things:

• permits Energy Capital Partners and its affiliates and affiliated funds and our non‑employee directors to conduct business that competes with us and to make investments in any kind of property in which we may make investments; and

• provides that if Energy Capital Partners or any of its affiliates who is also one of our non‑employee directors becomes aware of a potential business opportunity, transaction or other matter, they will have no duty to communicate or offer that opportunity to us.

Energy Capital Partners or its affiliates or affiliated funds may become aware, from time to time, of certain business opportunities (such as acquisition opportunities) and may direct such opportunities to other businesses in which they have invested, in which case we may not become aware of or otherwise have the ability to pursue such opportunity. Further, such businesses may choose to compete with us for these opportunities, possibly causing these opportunities to not be available to us or causing them to be more expensive for us to pursue. In addition, Energy Capital Partners and its affiliates and affiliated funds may dispose of their interests in energy infrastructure or other oilfield services companies or other assets in the future, without any obligation to offer us the opportunity to purchase any of those assets. As a result, our renouncing our interest and expectancy in any business opportunity that may be from time to time presented to Energy Capital Partners and its affiliates and affiliated funds could adversely impact our business or prospects if attractive business opportunities are procured by such parties for their own benefit rather than for ours.

In any of these matters, the interests of Energy Capital Partners and its affiliates and affiliated funds may differ or conflict with the interests of our other shareholders. Any actual or perceived conflicts of interest with respect to the foregoing could have an adverse impact on the trading price of our common stock.

The requirements of being a public company, including compliance with the reporting requirements of the Exchange Act and the requirements of the Sarbanes-Oxley Act and the NYSE, may strain our resources, increase our costs and distract management, and we may be unable to comply with these requirements in a timely or cost-effective manner.

As a public company, we incur significant legal, accounting and other expenses that we did not incur as a private company. We also incur costs associated with our public company reporting requirements and with corporate governance requirements, including requirements under the Sarbanes-Oxley Act of 2002, as well as rules implemented by the SEC and the NYSE. These rules and regulations have increased our legal and financial compliance costs and make some activities more time-consuming and costly. The rules and regulations also make it more difficult and more expensive for us to obtain director and officer liability insurance and we may be required to accept reduced policy limits and coverage or incur substantially

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higher costs to obtain the same or similar coverage. As a result, it may be more difficult for us to attract and retain qualified individuals to serve on our board of directors or as executive officers.

We are required to comply with certain provisions of Section 404 of the Sarbanes-Oxley Act of 2002, or Sarbanes-Oxley Act. Section 404 requires that we document and test our internal control over financial reporting and issue management’s assessment of our internal control over financial reporting. This section also requires that our independent registered public accounting firm opine on those internal controls upon becoming a large accelerated filer, as defined in the SEC rules, or otherwise ceasing to qualify as an emerging growth company under the JOBS Act. If we fail to continue to comply with the requirements of Section 404 of the Sarbanes-Oxley Act, or if we or our auditors identify and report material weaknesses in internal control over financial reporting, the accuracy and timeliness of the filing of our annual and quarterly reports may be materially adversely affected and could cause investors to lose confidence in our reported financial information, which could have a negative effect on the trading price of our common stock. In addition, a material weakness in the effectiveness of our internal control over financial reporting could result in an increased chance of fraud and the loss of customers, reduce our ability to obtain financing and require additional expenditures to comply with these requirements, each of which could have a material adverse effect on our business, results of operations and financial condition.

If securities or industry analysts do not publish research reports or publish unfavorable research about our business, the price and trading volume of our common stock could decline.

The trading market for our common stock depends in part on the research reports that securities or industry analysts publish about us or our business. We do not have any control over these analysts. If one or more of these analysts cease to cover us or fail to publish regular reports on us, interest in the purchase of our securities could decrease, which could cause the price of our common stock and other securities and their trading volume to decline. Moreover, if one or more of the analysts who cover us downgrade our securities, the price of our securities would likely decline.

Our certificate of incorporation and bylaws, as well as Delaware law, contain provisions that could discourage acquisition bids or merger proposals, which may adversely affect the market price of our common stock.

Our certificate of incorporation authorizes our board of directors to issue preferred stock, in addition to the Series A Preferred Shares, without shareholder approval. If our board of directors elects to issue preferred stock, it could be more difficult for a third party to acquire us. In addition, some provisions of our certificate of incorporation and bylaws could make it more difficult for a third party to acquire control of us, even if the change of control would be beneficial to our shareholders, including:

• limitations on the removal of directors;

• limitations on the ability of our shareholders to call special meetings;

• advance notice provisions for shareholder proposals and nominations for elections to the board of directors to be acted upon at meetings of shareholders;

• providing that the board of directors is expressly authorized to adopt, or to alter or repeal our bylaws; and

• establishing advance notice and certain information requirements for nominations for election to our board of directors or for proposing matters that can be acted upon by shareholders at shareholder meetings.

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We do not intend to pay dividends on our common stock, and our debt agreements place certain restrictions on our ability to do so. Consequently, your only opportunity to achieve a return on your investment is if the price of our common stock appreciates.

We do not plan to declare dividends on shares of our common stock in the foreseeable future. Additionally, our revolving credit facility places certain restrictions on our ability to pay cash dividends. Consequently, unless we revise our dividend policy, your only opportunity to achieve a return on your investment in us will be if you sell your common stock at a price greater than you paid for it.

Future sales of our common stock in the public market could reduce our stock price, and any additional capital raised by us through the sale of equity or convertible securities may dilute your ownership in us.

We may sell additional shares of common stock in subsequent public offerings. We may also issue additional shares of common stock or convertible securities. As of November 1, 2017 there were 83,039,854 shares of common stock outstanding. We cannot predict the size of future issuances of our common stock or securities convertible into common stock or the effect, if any, that future issuances and sales of shares of our common stock will have on the market price of our common stock. Sales of substantial amounts of our common stock (including shares issued in connection with an acquisition), or the perception that such sales could occur, may adversely affect prevailing market prices of our common stock.

A significant reduction by Energy Capital Partners of its ownership interests in us could adversely affect us.

We believe that Energy Capital Partners’ substantial ownership interest in us provides them with an economic incentive to assist us to be successful. However, Energy Capital Partners will not be subject to any obligation to maintain its ownership interest in us and may elect at any time thereafter to sell all or a substantial portion of or otherwise reduce its ownership interest in us. After giving effect to this offering, Energy Capital Partners will own approximately 29.5% of our outstanding common stock. If Energy Capital Partners sells all or a substantial portion of its ownership interest in us, it may have less incentive to assist in our success and its affiliate(s) that are expected to serve as members of our board of directors may resign. Such actions could adversely affect our ability to successfully implement our business strategies which could adversely affect our cash flows or results of operations.

We are an “emerging growth company” and we cannot be certain if the reduced disclosure requirements applicable to emerging growth companies will make our common stock less attractive to investors.

We are an “emerging growth company,” as defined in the JOBS Act, and we intend to take advantage of certain exemptions from various reporting requirements that are applicable to other public companies, including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes‑Oxley Act, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and shareholder approval of any golden parachute payments not previously approved. We intend to take advantage of these reporting exemptions until we are no longer an emerging growth company. If some investors find our common stock less attractive because we rely on these exemptions, there may be a less active trading market for our common stock and our stock price may be more volatile.

We will remain an emerging growth company for up to five years, although we will lose that status sooner if we have more than $1.07 billion of revenues in a fiscal year, become a “large accelerated filer” or issue more than $1.0 billion of non‑convertible debt over a rolling three‑year period.

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Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have irrevocably elected not to avail ourselves of this exemption from new or revised accounting standards and, therefore, we are subject to the same new or revised accounting standards as other public companies that are not emerging growth companies.

To the extent that we rely on any of the exemptions available to emerging growth companies, you will receive less information about our executive compensation and internal control over financial reporting than issuers that are not emerging growth companies. If some investors find our common stock to be less attractive as a result, there may be a less active trading market for our common stock and our stock price may be more volatile

Our ability to use our net operating loss carryforwards may be limited.

As of December 31, 2016, we had approximately $175.6 million of U.S. federal and state net operating loss carryforwards (“NOLs”). Our NOLs begin to expire in 2024. Utilization of these NOLs depends on many factors, including our future income, which cannot be assured. In addition, Section 382 of the Internal Revenue Code of 1986, as amended (“Section 382”), generally imposes an annual limitation on the amount of taxable income that may be offset by NOLs when a corporation has undergone an “ownership change” (as determined under Section 382). Generally, a change of more than 50% in the ownership of a corporation’s stock, by value, over a three‑year period constitutes an ownership change for U.S. federal income tax purposes. Any unused annual limitation may, subject to certain limitations, be carried over to later years. We have previously experienced ownership changes, which resulted in an annual limitation under Section 382 determined by multiplying the value of our stock at the time of the ownership change by the applicable long‑term tax‑exempt rate as defined in Section 382, increased under certain circumstances as a result of recognizing built‑in gains in our assets existing at the time of the ownership change. The limitations arising from ownership changes may prevent utilization of our NOLs prior to their expiration. Future ownership changes or regulatory changes could further limit our ability to utilize our NOLs. To the extent we are not able to offset our future income with our NOLs, this could adversely affect our operating results and cash flows if we attain profitability.

Our certificate of incorporation designates the Court of Chancery of the State of Delaware as the sole and exclusive forum for certain types of actions and proceedings that may be initiated by our shareholders, which could limit our shareholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers, employees or agents.

Our certificate of incorporation provides that, unless we consent in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware will, to the fullest extent permitted by applicable law, be the sole and exclusive forum for (i) any derivative action or proceeding brought on our behalf, (ii) any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers, employees or agents to us or our shareholders, (iii) any action asserting a claim arising pursuant to any provision of the Delaware General Corporation Law (the “DGCL”), our certificate of incorporation or our bylaws, or (iv) any action asserting a claim against us that is governed by the internal affairs doctrine, in each such case subject to such Court of Chancery having personal jurisdiction over the indispensable parties named as defendants therein. Any person or entity purchasing or otherwise acquiring any interest in shares of our capital stock will be deemed to have notice of, and consented to, the provisions of our certificate of incorporation described in the preceding sentence. This choice of forum provision may limit a shareholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers, employees or agents, which may discourage such lawsuits against us and such persons. Alternatively, if a court were to find these provisions of our certificate of incorporation inapplicable to, or unenforceable in respect of, one or more of the specified types of actions or proceedings, we may incur additional costs associated with resolving such matters in other jurisdictions, which could adversely affect our business, financial condition or results of operations.

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USE OF PROCEEDS

We will not receive any of the proceeds from the sale of shares of our common stock by the selling shareholders pursuant to this prospectus. In addition, we will pay all expenses related to this offering, other than underwriting discounts and commissions related to the shares sold by the selling shareholders.

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PRICE RANGE OF COMMON STOCK AND DIVIDENDS

Our common stock is currently listed on the NYSE under the symbol “PUMP.” The following table sets forth for the periods indicated, the reported high and low bid quotations per share for our common stock.

	Price Per Share of Common Stock		Dividends Per Share
	High	Low
2017
Fourth quarter (through November 1, 2017)	15.73	13.81	N/A
Third quarter	14.48	10.92	N/A
Second quarter	14.70	11.93	N/A
First quarter(1)	14.50	12.47	N/A

____________________

(1) For the period from March 17, 2017 through March 31, 2017.

On November 1, 2017, the closing price of our common stock was $15.73. As of November 1, 2017, there were 83,039,854 shares of common stock outstanding, held of record by 20 holders. The number of record holders of our common stock does not include DTC participants or beneficial owners holding shares through nominee names.

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DIVIDEND POLICY

We do not anticipate declaring or paying any cash dividends to holders of our common stock in the foreseeable future. We currently intend to retain future earnings, if any, to finance the growth of our business. Our future dividend policy is within the discretion of our board of directors and will depend upon then‑existing conditions, including our results of operations, financial condition, capital requirements, investment opportunities, statutory restrictions on our ability to pay dividends and other factors our board of directors may deem relevant. In addition, our revolving credit facility places restrictions on our ability to pay cash dividends.

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SELECTED HISTORICAL FINANCIAL DATA

The following table presents selected historical financial and operating data of ProPetro Holding Corp. as of the dates and for the years indicated. The selected historical financial data as of and for the years ended December 31, 2016 and 2015 are derived from the audited consolidated financial statements appearing elsewhere in this prospectus. The selected historical interim financial data as of September 30, 2017 and for the nine months ended September 30, 2017 and 2016, are derived from the unaudited interim financial statements appearing elsewhere in this prospectus. Historical results are not necessarily indicative of future results.

We conduct our business through seven operating segments: hydraulic fracturing, cementing, acidizing, coil tubing, flowback, surface drilling and Permian drilling. For reporting purposes, the hydraulic fracturing, cementing and acidizing operating segments are aggregated into our one reportable segment: pressure pumping. The selected historical consolidated financial and operating data presented below should be read in conjunction with “Risk Factors,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements and the related notes and other financial data included elsewhere in this prospectus.

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	For the Nine Months Ended September 30,						For the Year Ended December 31,
(In thousands, except for per share data and percentages)	2017			2016			2016			2015
Statement of Operations Data:
Revenue	$	668,153		$	272,999		$	436,920		$	569,618
Pressure pumping	639,355			251,410			409,014			510,198
All other	28,798			21,589			27,906			59,420
Costs and Expenses:
Cost of services(1)	551,775			255,362			404,140			483,338
General and administrative(2)	38,881			17,197			26,613			27,370
Depreciation and amortization	38,602			32,669			43,542			50,134
Property and equipment impairment expense	—			—			6,305			36,609
Goodwill impairment expense	—			—			1,177			—
Loss on disposal of assets	28,971			12,859			22,529			21,268
Total costs and expenses	$	658,229		$	318,087		$	504,306		$	618,719
Operating Income (Loss)	$	9,924		$	(45,088	)	$	(67,386	)	$	(49,101	)
Other Income (Expense):
Interest expense	$	(6,469	)	$	(15,924	)	$	(20,387	)	$	(21,641	)
Gain on extinguishment of debt	—			6,975			6,975			—
Other expense	(792		)	(419		)	(321		)	(499		)
Total other expense	(7,261		)	(9,386		)	(13,733		)	(22,140		)
Income (loss) before income taxes	2,663			(54,474		)	(81,119		)	(71,241		)
Income tax (expense) benefit	(128		)	18,644			27,972			25,388
Net income (loss)	$	2,535		$	(35,380	)	$	(53,147	)	$	(45,853	)
Per Share Information
Net income (loss) per common share:
Basic	$	0.03		$	(0.84	)	$	(1.19	)	$	(1.31	)
Diluted	$	0.03		$	(0.84	)	$	(1.19	)	$	(1.31	)
Weighted average common shares outstanding:
Basic	74,124			42,526			44,787			34,993
Diluted	77,118			42,526			44,787			34,993
Balance Sheet Data as of:
Cash and cash equivalents	$	51,008					$	133,596		$	34,310
Property and equipment — net of accumulated depreciation	$	399,268					$	263,862		$	291,838
Total assets	$	638,591					$	541,422		$	446,454
Long-term debt — net of deferred loan costs	$	34,476					$	159,407		$	236,876
Total shareholders’ equity	$	402,415					$	221,009		$	69,571
Cash Flow Statement Data:
Net cash provided by (used in) operating activities	$	78,673		$	(5,652	)	$	10,658		$	81,231
Net cash used in investing activities	$	(189,583	)	$	(18,156	)	$	(41,688	)	$	(62,776	)
Net cash provided by (used in) financing activities	$	28,322		$	(5,214	)	$	130,315		$	(15,216	)
Other Data:
Adjusted EBITDA(3)	$	94,655		$	1,570		$	7,816		$	60,149
Adjusted EBITDA margin(3)	14.17		%	0.58		%	1.80		%	10.60		%
Capital expenditures	$	206,328		$	21,894		$	46,008		$	71,677

____________________

(1) Exclusive of depreciation and amortization.

(2) Inclusive of stock‑based compensation.

(3) We view Adjusted EBITDA and Adjusted EBITDA margin as important indicators of performance. We define EBITDA as our net income, before (i) interest expense, (ii) income taxes and (iii) depreciation and amortization. We define Adjusted EBITDA as EBITDA, plus (i) loss on disposal of assets, (ii) gain on extinguishment of debt, (iii) stock based compensation, and (iv) other

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unusual or non‑recurring charges, such as costs related to our initial public offering. Adjusted EBITDA margin reflects our Adjusted EBITDA as a percentage of our revenues.

EBITDA, Adjusted EBITDA and Adjusted EBITDA margin are supplemental measures utilized by our management and other users of our financial statements such as investors, commercial banks, research analysts and others, to assess our financial performance because it allows us to compare our operating performance on a consistent basis across periods by removing the effects of our capital structure (such as varying levels of interest expense), asset base (such as depreciation and amortization) and items outside the control of our management team (such as income tax rates). EBITDA, Adjusted EBITDA and Adjusted EBITDA margin have limitations as analytical tools and should not be considered as an alternative to net income, operating income, cash flow from operating activities or any other measure of financial performance presented in accordance with GAAP.

We believe that our presentation of EBITDA, Adjusted EBITDA and Adjusted EBITDA margin will provide useful information to investors in assessing our financial condition and results of operations. Net income is the GAAP measure most directly comparable to EBITDA, Adjusted EBITDA and Adjusted EBITDA margin. EBITDA, Adjusted EBITDA and Adjusted EBITDA margin should not be considered alternatives to net income presented in accordance with GAAP. Because EBITDA, Adjusted EBITDA and Adjusted EBITDA margin may be defined differently by other companies in our industry, our definition of EBITDA, Adjusted EBITDA and Adjusted EBITDA margin may not be comparable to similarly titled measures of other companies, thereby diminishing its utility. The following table presents a reconciliation of net loss to EBITDA, Adjusted EBITDA and Adjusted EBITDA margin for each of the years indicated.

Reconciliation of net income (loss) to Adjusted EBITDA

	For the Nine Months Ended September 30,						For the Year Ended December 31,
($ in thousands, except percentages)	2017			2016			2016			2015
Net income (loss)	$	2,535		$	(35,830	)	$	(53,147	)	$	(45,853	)
Interest expense	6,469			15,942			20,387			21,641
Income tax (benefit) expense	128			(18,644		)	(27,972		)	(25,388		)
Depreciation and amortization	38,602			32,669			43,542			50,134
EBITDA	$	47,734		$	(5,863	)	$	(17,190	)	$	534
Property and equipment impairment expense	—			—			6,305			36,609
Goodwill impairment expense	—			—			1,177			—
Loss on disposal of assets	28,971			12,859			22,529			21,268
Gain on extinguishment of debt	—			(6,975		)	(6,975		)	—
Stock-based compensation	8,730			1,130			1,649			1,239
Other expense	792			419			321			499
Other general and administrative expense (1)	722			—			—			—
Deferred IPO bonus expense	7,706			—			—			—
Adjusted EBITDA	$	94,655		$	1,570		$	7,816		$	60,149
Revenue	$	668,153		$	272,999		$	436,920		$	569,618
Adjusted EBITDA margin	14.17		%	0.58		%	1.80		%	10.60		%

____________________

(1) Other general and administrative expense relates to legal settlement expense.

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MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION

AND RESULTS OF OPERATIONS

You should read the following discussion and analysis of our financial condition and results of operations together with our audited financial statements and the related notes appearing at the end of this prospectus. Some of the information contained in this discussion and analysis or set forth elsewhere in this prospectus, including information with respect to our plans and strategy for our business and related financing, includes forward‑looking statements that involve risks and uncertainties. You should read the “Risk Factors” section of this prospectus for a discussion of important factors that could cause actual results to differ materially from the results described in or implied by the forward‑looking statements contained in the following discussion and analysis.

Basis of Presentation

Unless otherwise indicated, references in this “Management’s Discussion and Analysis of Financial Condition and Results of Operations” to “ProPetro Holding Corp.,” “the Company,” “we,” “our,” “us” or like terms refer to ProPetro Holding Corp. and its subsidiary.

Overview

We are a growth‑oriented, Midland, Texas‑based oilfield services company providing hydraulic fracturing and other complementary services to leading upstream oil and gas companies engaged in the exploration and production, or E&P, of North American unconventional oil and natural gas resources. Our operations are primarily focused in the Permian Basin, where we have cultivated longstanding customer relationships with some of the region’s most active and well‑capitalized E&P companies. The Permian Basin is widely regarded as the most prolific oil‑producing area in the United States, and we believe we are currently one of the largest providers of hydraulic fracturing services in the region by hydraulic horsepower, or HHP, with an aggregate deployed capacity of 690,000 HHP. Our fleet has been designed to handle the highest intensity, most complex hydraulic fracturing jobs, and has been 100% utilized since September 2016. In the quarter ended September 30, 2017, put three new hydraulic fracturing units into service. We also deployed one additional new hydraulic fracturing unit in the fourth quarter of 2017, bringing our current fleet total to 16 deployed units. In addition, we have contracted to purchase one new hydraulic fracturing unit which is scheduled for delivery and deployment to a dedicated customer by the end of the first quarter of 2018. This unit will provide us with an additional 45,000 HHP, bringing our aggregate capacity to 735,000 HHP.

Our Assets and Operations

Through our pressure pumping segment, which includes cementing and acidizing operations, we primarily provide hydraulic fracturing services to E&P companies in the Permian Basin. Our modern hydraulic fracturing fleet has been designed to handle Permian Basin specific operating conditions and the region’s increasingly high‑intensity well completions, which are characterized by longer horizontal wellbores, more frac stages per lateral and increasing amounts of proppant per well. Over 75% of our fleet has been delivered over the past four years, and approximately 85% of our fleet has been built by a single manufacturer since 2013. Further, we have fully maintained our equipment throughout the recent industry downturn to ensure optimal performance and reliability. Additionally, all of the hydraulic horsepower delivered over the last four years has been sourced from a single manufacturer, leading to a homogeneous fleet with streamlined maintenance programs and training for our personnel.

In addition to our core pressure pumping segment operations, we also offer a suite of complementary well completion and production services, including coiled tubing, flowback services and surface air drilling. We believe these complementary services create operational efficiencies for our customers and allow us to capture a greater portion of their capital spending across the lifecycle of a well. Additionally, we believe that these complementary services should benefit from a continued industry recovery and that we are well

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positioned to continue expanding these offerings in response to our customers increasing service needs and spending levels.

How We Generate Revenue

We generate revenue primarily through our pressure pumping segment, and more specifically, by providing hydraulic fracturing services to our customers. We own and operate a fleet of mobile hydraulic fracturing units and other auxiliary equipment to perform fracturing services. We also provide personnel and services that are tailored to meet each of our customers’ needs. We generally do not have long‑term written contractual arrangements with our customers other than standard master service agreements, which include general contractual terms between our customers and us. We charge our customers on a per‑job basis, in which we set pricing terms after receiving full specifications for the requested job, including the lateral length of the customer’s wellbore, the number of frac stages per well, the amount of proppant to be employed and other parameters of the job.

In addition to hydraulic fracturing services, we generate revenue through the complementary services that we provide to our customers, including cementing, acidizing, coiled tubing, flowback services and surface air drilling. These complementary services are provided through various contractual arrangements, including on a turnkey contract basis, in which we set a price to perform a particular job, a daywork contract basis, in which we are paid a set price per day for our services, or a footage contract basis, in which we are paid a set price per foot we drill. We are also sometimes paid by the hour for these complementary services.

Costs of Conducting our Business

The principal direct costs involved in operating our business are expendables, other direct costs, and direct labor costs. Generally, we price each job to reflect a predetermined margin over our expendables and direct labor costs. Our fixed costs are relatively low and a large portion of the costs described below are only incurred as we perform jobs for our customers.

Expendables. Expendables are the largest expenses incurred, and include the product and freight costs associated with proppant, chemicals and other consumables used in our pressure pumping and other operations. These costs comprise a substantial variable component of our service costs, particularly with respect to the quantity and quality of sand and chemicals demanded when providing hydraulic fracturing services. Expendable product costs comprised approximately 61.0% and 58.9% of total costs of service for the years ended December 31, 2016 and 2015, respectively.

Other Direct Costs. We incur other direct expenses related to our service offerings, including the costs of fuel, repairs and maintenance, general supplies, equipment rental and other miscellaneous operating expenses. Fuel is consumed both in the operation and movement of our hydraulic fracturing fleet and other equipment. Repairs and maintenance costs are expenses directly related to upkeep of equipment, which have been amplified by the demand for higher horsepower jobs. Capital expenditures to upgrade or extend the useful life of equipment are not included in other direct costs. Other direct costs were 24.4% and 24.3% of total costs of service for the years ended December 31, 2016 and 2015, respectively.

Direct Labor Costs. Payroll and benefit expenses related to our crews and other employees that are directly attributable to the effective delivery of services are included in our operating costs. Direct labor costs amounted to 14.5% and 16.9% of total costs of service for the years ended December 31, 2016 and 2015, respectively.

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How We Evaluate Our Operations

Our management uses a variety of financial and operating metrics to evaluate and analyze the performance of our business, including Adjusted EBITDA and Adjusted EBITDA margin.

EBITDA, Adjusted EBITDA and Adjusted EBITDA margin

We view Adjusted EBITDA and Adjusted EBITDA margin as important indicators of performance. We define EBITDA as our net income, before (i) interest expense, (ii) income taxes and (iii) depreciation and amortization. We define Adjusted EBITDA as EBITDA, plus (i) loss/(gain) on disposal of assets, (ii) gain on extinguishment of debt, (iii) stock based compensation, and (iv) other unusual or non‑recurring expenses, such as costs related to our initial public offering. Adjusted EBITDA margin reflects our Adjusted EBITDA as a percentage of our revenues.

EBITDA, Adjusted EBITDA and Adjusted EBITDA margin are supplemental measures utilized by our management and other users of our financial statements such as investors, commercial banks, research analysts and others, to assess our financial performance because it allows us to compare our operating performance on a consistent basis across periods by removing the effects of our capital structure (such as varying levels of interest expense), asset base (such as depreciation and amortization), nonrecurring expenses (such as IPO bonus) and items outside the control of our management team (such as income tax rates). EBITDA, Adjusted EBITDA and Adjusted EBITDA margin have limitations as analytical tools and should not be considered as an alternative to net income, operating income, cash flow from operating activities or any other measure of financial performance presented in accordance with GAAP.

Note Regarding Non‑GAAP Financial Measures

EBITDA, Adjusted EBITDA and Adjusted EBITDA margin are not financial measures presented in accordance with GAAP. We believe that the presentation of these non‑GAAP financial measures will provide useful information to investors in assessing our financial condition and results of operations. Net income is the GAAP measure most directly comparable to Adjusted EBITDA. Our non‑GAAP financial measures should not be considered as alternatives to the most directly comparable GAAP financial measure. Each of these non‑GAAP financial measures has important limitations as analytical tools because they exclude some but not all items that affect the most directly comparable GAAP financial measures. You should not consider Adjusted EBITDA or Adjusted EBITDA margin in isolation or as a substitute for an analysis of our results as reported under GAAP. Because Adjusted EBITDA and Adjusted EBITDA margin may be defined differently by other companies in our industry, our definitions of these non‑GAAP financial measures may not be comparable to similarly titled measures of other companies, thereby diminishing their utility. Please read “Selected Historical Financial Data” for definition of EBITDA, Adjusted EBITDA and Adjusted EBITDA margin.

Factors Affecting the Comparability of Our Financial Results

Our future results of operations may not be comparable to our historical results of operations for the reasons described below:

Our strategic focus on our pressure pumping segment and other complementary services will reduce the relative financial contribution of the Permian drilling operating segment in our results of operations. We expect revenues and costs of services related to our Permian drilling operating segment to comprise a lower percentage of total revenues and total costs of service in future results of operations when compared to historic results due to our increased focus on pressure pumping and other complementary service offerings. We idled all seven of our Permian vertical drilling rigs throughout 2016. As a result, Permian drilling comprised only $9.9 million of revenue (or 2.3% of revenues) for the year ended December 31, 2016, as compared to $35.7 million (or 6.3% of revenues) for the year ended December 31, 2015. Likewise cost of services related to Permian drilling was $8.5 million (2.1% of all costs of services) for the year ended December 31, 2016 as compared to $30.8 million (or 6.4% of cost of

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service) for the year ended December 31, 2015. We anticipate the financial significance of this service line relative to the financial results from pressure pumping and other service offerings to continue to decline.

Results of Operations

We conduct our business through seven operating segments: hydraulic fracturing, cementing, acidizing, coil tubing, flowback, surface drilling, and Permian drilling. For reporting purposes, the hydraulic fracturing, cementing and acidizing operating segments are aggregated into our one reportable segment: pressure pumping. We expect revenues and costs of services related to our Permian drilling operating segment to comprise a lower percentage of total revenues and total costs of service in future results of operations when compared to historic results due to our increased focus on pressure pumping and other complementary service offerings. We anticipate the financial significance of this service line relative to the financial results from pressure pumping and other service offerings to continue to decline.

The following table sets forth selected operating data for the periods indicated.

	Nine Months Ended September 30,						Year Ended December 31,
(in thousands, except percentages)	2017			2016			2016			2015
Revenue	$	668,153		$	272,999		$	436,920		$	569,618
Cost of services(1)	551,775			255,362			404,140			483,338
General and administrative expense(2)	38,881			17,197			26,613			27,370
Depreciation and amortization	38,602			32,669			43,542			50,134
Property and equipment impairment expense	—			—			6,305			36,609
Goodwill impairment expense	—			—			1,177			—
Loss on disposal of assets	28,971			12,859			22,529			21,268
Interest expense	6,469			15,942			20,387			21,641
Gain on extinguishment of debt	—			(6,975		)	(6,975		)	—
Other expense	792			419			321			499
Income tax expense/(benefit)	128			(18,644		)	(27,972		)	(25,388		)
Net income (loss)	$	2,535		$	(35,830	)	$	(53,147	)	$	(45,853	)
Adjusted EBITDA(3)	$	94,655		$	1,570		$	7,816		$	60,149
Adjusted EBITDA Margin(3)	14.17		%	0.58		%	1.80		%	10.60		%
Pressure pumping segment results of operations:
Revenue	$	639,355		$	251,410		$	409,014		$	510,198
Cost of services	$	529,818		$	235,587		$	379,815		$	432,372
Adjusted EBITDA	$	98,296		$	6,500		$	15,655		$	62,540
Adjusted EBITDA Margin(4)	15.37		%	2.59		%	3.80		%	12.30		%

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(1) Exclusive of depreciation and amortization.

(2) Inclusive of stock‑based compensation.

(3) For definitions of the non‑GAAP financial measures of Adjusted EBITDA and Adjusted EBITDA margin and reconciliation of Adjusted EBITDA and Adjusted EBITDA margin to our most directly comparable financial measures calculated in accordance with GAAP, please read “Selected Historical Financial Data”.

(4) The non‑GAAP financial measure of Adjusted EBITDA margin for the pressure pumping segment is calculated by taking Adjusted EBITDA for the pressure pumping segment as a percentage of our revenues for the pressure pumping segment.

Nine Months Ended September 30, 2017 Compared to Nine Months Ended September 30, 2016

Revenues.  Revenues increased 144.7%, or $395.2 million, to $668.2 million for the nine months ended September 30, 2017, as compared to $273.0 million for the nine months ended September 30, 2016. The increase was primarily attributable to the increase in customer activity, fleet size and demand for

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our services, which has led to an increase in pricing for our hydraulic fracturing and other services. Our pressure pumping segment revenues increased 154.3%, or $387.9 million for the nine months ended September 30, 2017 as compared to the nine months ended September 30, 2016. Revenues from services other than pressure pumping increased 33.4%, or $7.2 million, in the nine months ended September 30, 2017, as compared to the nine months ended September 30, 2016. The increase in revenues from services other than pressure pumping during the nine months ended September 30, 2017 was primarily attributable to the increase in revenues and customer demand for our flowback, coil tubing and surface drilling services, offset by the decrease in revenue from idling of our Permian drilling rigs.

Cost of Services.  Cost of services increased 116.1%, or $296.4 million, to $551.8 million for the nine months ended September 30, 2017, from $255.4 million during the nine months ended September 30, 2016. Cost of services in our pressure pumping segment increased $294.2 million for the nine months ended September 30, 2017, as compared to the nine months ended September 30, 2016. The increases were primarily attributable to higher activity levels, coupled with an increase in personnel headcount following the increased activity levels. As a percentage of pressure pumping segment revenues, pressure pumping cost of services decreased to 82.9% for the nine months ended September 30, 2017, as compared to 93.7% for the nine months ended September 30, 2016. The decrease in cost of services as a percentage of revenue for the pressure pumping segment resulted from greater pricing power as demand for our services increased, without a corresponding increase in costs, which resulted in significantly higher realized Adjusted EBITDA margins during the nine months ended September 30, 2017.

General and Administrative Expenses.  General and administrative expenses increased 126.1%, or $21.7 million, to $38.9 million for the nine months ended September 30, 2017, as compared to $17.2 million for the nine months ended September 30, 2016. The increase was primarily attributable to increases in legal and professional fees, insurance expense and payroll, totaling $6.7 million, IPO bonus of $7.7 million to key employees, along with $7.6 million increase in stock compensation recorded during 2017, and partially offset by a $0.3 million decrease in other remaining general and administrative expenses. General and administrative expenses, excluding non-recurring deferred IPO bonus of $7.7 million and stock compensation compensation expense of $6.8 million, as a percentage of total revenues decreased to 3.6% for the nine months ended September 30, 2017, as compared to 6.3% for the nine months ended September 30, 2016, and the decrease is as a result of the higher revenue in the nine months ended September 30, 2017.

Depreciation and Amortization.  Depreciation and amortization increased 18.2%, or $5.9 million, to $38.6 million for the nine months ended September 30, 2017, as compared to $32.7 million for the nine months ended September 30, 2016. The increase was primarily attributable to additional property and equipment purchased and put into service during the nine months ended September 30, 2017. We calculate depreciation of property and equipment using the straight-line method.

Loss on Disposal of Assets.  Loss on the disposal of assets increased 125.3%, or 16.1 million, to $29.0 million for the nine months ended September 30, 2017, as compared to $12.9 million for the nine months ended September 30, 2016. The increase was primarily attributable to greater service intensity of jobs completed coupled with higher fleet size, activity levels and utilization of our equipment.

Interest Expense.  Interest expense decreased 59.4%, or $9.5 million, to $6.5 million for the nine months ended September 30, 2017, as compared to $15.9 million for the nine months ended September 30, 2016. The decrease in interest expense was primarily attributable to a reduction in our average debt balance during 2017 due to the early retirement of our Term Loan and Revolving Credit Facility in the first quarter of 2017.

Other Expense.  Other expense was $0.8 million for the nine months ended September 30, 2017, as compared to $0.4 million for the nine months ended September 30, 2016. The increase was primarily attributable to an increase in lenders related expenses, non-recurring listing related expenses, and

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partially offset by an increase in the unrealized gain resulting from the change in the fair value of our interest rate swap liability at September 30, 2017 compared to September 30, 2016.

Gain on Extinguishment of Debt.  There was no debt extinguishment gain or loss during the nine months ended September 30, 2017, compared to the gain on extinguishment of debt, net of cost, of $7.0 million during the nine months ended September 30, 2016. The gain on extinguishment of debt during 2016 was as a result of the auction process with our lenders to repurchase $37.5 million of our Term Loan at a 20% discount to par value.

Income Tax Expense/(Benefit).  For the nine months ended September 30, 2017, the Company has utilized the discrete effective tax rate method as allowed by Accounting Standards Codification (“ASC”) 740-270-30-18, Income Taxes - Interim Reporting to calculate its interim tax provision. The discrete method treats the year to date period as if it was the annual period and determines the income tax expense or benefit on that basis. The Company believes that, at this time, the use of this discrete method is more appropriate than the annual effective tax rate method as the annual effective tax rate is not reliable because small changes in estimated “ordinary” income would result in significant changes in the estimated annual effective tax rate. Total income tax expense was $0.1 million resulting in an effective tax rate of 4.8% for the nine months ended September 30, 2017, compared to total income tax benefit of $18.6 million and an effective tax rate of 34.2% for the nine months ended September 30, 2016. The change in effective tax rate is primarily due to the Company’s full valuation allowance position, impact of indefinite lived assets, and state tax expense.

Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

Revenues. Revenues decreased 23.3%, or $132.7 million, to $436.9 million for the year ended December 31, 2016 as compared to $569.6 million for the year ended December 31, 2015. The decrease was primarily attributable to a reduction in customer activity, a decline in pricing for our frac services as a result of an over‑supply of HHP in our areas of operations, and the idling of our seven Permian drilling rigs. Our pressure pumping segment revenues decreased 19.8%, or $101.2 million, for the year ended December 31, 2016 as compared to the year ended December 31, 2015. Revenues other than pressure pumping decreased 53.0%, or $31.5 million, for the year December 31, 2016 as compared to the year ended December 31, 2015. The decrease was primarily attributable to a decline in demand and pricing for these ancillary services. The overall decrease in revenues was attributable to a competitive market environment caused by the decrease in U.S. onshore drilling and completion activity as a result of decreased oil and natural gas commodity prices. Average oil and natural gas prices have decreased 11.0% and 3.8%, respectively, from the year ended December 31, 2015 as compared to the year ended December 31, 2016. The Baker Hughes U.S. onshore rig count also decreased 48.3% during the year ended December 31, 2016 as compared to the year ended December 31, 2015.

Cost of Services. Cost of services decreased 16.4%, or $79.2 million, to $404.1 million for the year ended December 31, 2016 from $483.3 million as compared to the year ended December 31, 2015. Cost of services in our pressure pumping segment decreased $52.6 million for the year ended December 31, 2016 as compared to the year ended December 31, 2015. The decreases were primarily attributable to lower activity levels, coupled with reduced personnel headcount. As a percentage of pressure pumping segment revenues, pressure pumping cost of services increased to 92.9% for the year ended December 31, 2016 as compared to 84.7% for the year ended December 31, 2015. The increase in cost of services as a percentage of sales for the pressure pumping segment resulted from lower revenue generating activity levels without a corresponding reduction in costs as well as depressed pricing for our services, which resulted in significantly lower realized EBITDA margins.

General and Administrative Expenses. General and administrative expenses decreased 2.8%, or $0.8 million, to $26.6 million for the year ended December 31, 2016 as compared to $27.4 million for the year ended December 31, 2015. The decrease was primarily attributable to a $2.2 million reduction in insurance expense due to a reduction in personnel headcount and a $1.0 million reduction in property

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taxes, partially offset by an increase in bonus expense of $2.5 million as compared to 2015. General and administrative expenses as a percentage of total revenues was 6.1% for the year ended December 31, 2016 as compared to 4.8% for the year ended December 31, 2015. This increase was due partially to pricing pressures in a competitive operating environment, as well as our decision to maintain equipment and retain key personnel during times of lower equipment utilization levels.

Depreciation and Amortization. Depreciation and amortization decreased 13.1%, or $6.6 million, to $43.5 million for the year ended December 31, 2016 as compared to $50.1 million for the year ended December 31, 2015. The decrease was primarily attributable to a decrease in average depreciable assets partially offset by approximately $46.0 million in capital expenditures during the year ended December 31, 2016. We calculate depreciation of property and equipment using the straight‑line method.

Property and Equipment Impairment Expense. Property and equipment impairment expense was $36.6 million for the year ended December 31, 2015, as compared to $6.3 million for the year ended December 31, 2016. The non‑cash impairment expense in 2015 was associated with our Permian drilling rigs and acidizing assets and was recognized as a result of depressed commodity prices and a negative future near‑term outlook for these assets. The non‑cash impairment expense in 2016 was a result of the continuous depressed demand for our vertical drilling rigs.

Goodwill Impairment Expense. Goodwill impairment expense was $1.2 million for the year ended December 31, 2016, as compared to no goodwill impairment expense for the year ended December 31, 2015. The impairment expense in 2016 was attributable to the write‑down of goodwill related to our surface drilling reporting unit.

Loss on Disposal of Assets. Loss on the disposal of assets increased 5.9%, or $1.3 million, to $22.5 million for the year ended December 31, 2016 as compared to $21.3 million for the year ended December 31, 2015. The increase was primarily attributable to greater service intensity of jobs completed despite lower pressure pumping activity levels.

Interest Expense. Interest expense decreased 5.8%, or $1.3 million, to $20.4 million for the year ended December 31, 2016 as compared to $21.6 million for the year ended December 31, 2015. The decrease in interest expense was primarily attributable to a reduction in our average debt balance during 2016.

Gain on Extinguishment of Debt. Gain on extinguishment of debt was $7.0 million, net of cost, for the year ended December 31, 2016, as compared to no debt extinguishment gain or loss for the year ended December 31, 2015. In June 2016, we conducted an auction process with our lenders to repurchase $37.5 million of our term loan at a 20% discount to par value.

Other Expense. Other expense decreased to $0.3 million for the year ended December 31, 2016 as compared to $0.5 million for the year ended December 31, 2015. The decrease was primarily attributable to an unrealized gain resulting from the change in the fair value of our interest rate swap liability at December 31, 2016 compared to 2015, partially offset by restructuring expenses related to the first amendment to our existing credit agreement incurred in 2016 and the reduction of other income in 2016 as compared to 2015.

Income Tax Benefit. The increase of $2.6 million in income tax benefit for the year ended December 31, 2016 as compared to the year ended December 31, 2015 is primarily attributable to a higher loss before income taxes, partially offset by the valuation allowance of $0.9 million recorded in the year.

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Liquidity and Capital Resources

Historically, our primary sources of liquidity and capital resources have been borrowings under our term loan and revolving credit facility, cash flows from our operations and capital contributions from our shareholders. Our primary uses of capital have been investing in and maintaining our property and equipment and repaying indebtedness. As of December 31, 2016, our cash and cash equivalents were $133.6 million, and as of December 31, 2015, were $34.3 million.

As of September 30, 2017, our cash and cash equivalents were $51.0 million, as compared to $133.6 million at December 31, 2016. Our liquidity is currently provided by (i) existing cash balances, (ii) operating cash flows and (iii) borrowings under our revolving credit facility. Our primary uses of cash will be to continue to fund our operations, support organic growth opportunities and satisfy debt payments, if incurred.

Effective as of December 27, 2016, we completed a private placement of 16,999,990 shares of Series A Preferred Shares, par value $0.001 per share (the “Series A Preferred Shares”). We received net proceeds of approximately $163 million and used the net proceeds (i) to repay a portion of the indebtedness outstanding under our revolving credit facility and term loan, (ii) to acquire new hydraulic fracturing units totaling 90,000 additional HHP and (iii) for general corporate purposes.

On March 22, 2017, we completed our IPO for proceeds of approximately $170.1 million, net of underwriting discounts and commissions and offering expenses. We used the net proceeds to repay outstanding borrowings under our term loan, to fund the purchase of additional hydraulic fracturing units and for general corporate purposes. Following our IPO, we expect that our primary sources of liquidity and capital resources going forward will be cash flows generated by operating activities and borrowings under our revolving credit facility.

There can be no assurance that operations and other capital resources will provide cash in sufficient amounts to maintain planned or future levels of capital expenditures. Future cash flows are subject to a number of variables, and are highly dependent on the drilling, completion, and production activity by our customers, which in turn is highly dependent on oil and gas prices. Depending upon market conditions and other factors, we may issue equity and debt securities or take other actions necessary to fund our business or meet our future obligations.

Working Capital

Working capital is the amount by which current assets exceed current liabilities and is a measure of our ability to pay our liabilities as they become due. The following table presents the components of our working capital as of September 30, 2017 compared to December 31, 2016 and compared to December 31, 2015.

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	September 30, 2017		December 31,
($ in thousands)			2016		2015
Current Assets:
Cash and cash equivalents	$	51,008	$	133,596	$	34,310
Accounts receivable — net of allowance for doubtful accounts	160,047		115,179		90,291
Inventories	9,148		4,713		8,572
Prepaid expenses	5,543		4,609		4,488
Other current assets	975		6,683		804
Total current assets	$	226,721	$	264,780	$	138,465
Current liabilities:
Accounts payable	$	181,660	$	129,093	$	87,365
Accrued liabilities	11,074		13,620		7,052
Current portion of long‑term debt	7,441		16,920		16,295
Accrued interest payable	86		108		77
Total current liabilities	$	200,261	$	159,741	$	110,789
Working capital	$	26,460	$	105,039	$	27,676

Our working capital totaled $26.5 million, $105.0 million and $27.7 million at September 30, 2017, December 31, 2016 and December 31, 2015, respectively.

The $78.5 million decrease in working capital from December 31, 2016 to September 30, 2017 is primarily attributable to our use of cash for operating, investing and financing activities.

The $77.4 million increase in working capital between December 31, 2015 and December 31, 2016 was primarily due to the receipt of $163.0 million (net of $7.5 million transaction costs) from the private placement issuance of Series A Preferred Shares. As of December 31, 2016, $25 million of the proceeds from the private placement were used to pay a portion of the outstanding indebtedness under our revolving credit facility. The increase in cash due to the proceeds from the private placement was partially offset by a decrease in cash provided by operations as a result of depressed revenues and margins during 2016. These factors contributed to a $99.3 million net increase in cash and cash equivalents.

Cash and Cash Flows

Our cash and cash equivalents were $51.0 million, $133.6 million and $34.3 million at September 30, 2017, December 31, 2016 and December 31, 2015, respectively.

The following table sets forth our cash flow for the periods indicated:

	Nine Months Ended September 30,						Year Ended December 31,
($ in thousands)	2017			2016			2016			2015
Net cash provided by used in operating activities	$	78,693		$	(5,652	)	$	10,658		$	81,231
Net cash (used in) provided by investing activities	$	(189,583	)	$	(18,156	)	$	(41,688	)	$	(62,776	)
Net cash (used in) provided by financing activities	$	28,322		$	(5,214	)	$	130,315		$	(15,216	)

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Operating Activities

Net cash provided by operating activities was $78.7 million for the nine months ended September 30, 2017, compared to net cash used in operating activities of $5.7 million for the nine months ended September 30, 2016. The net increase of $84.3 million was primarily due to an increase in revenue and net income in the period, offset by our working capital needs resulting from higher fleet size and expanding activity levels.

Net cash provided by operating activities was $10.7 million for the year ended December 31, 2016 and $81.2 million for the year ended December 31, 2015. The decrease was primarily due to a decrease in operating margins when adjusted for non‑cash items. Operating income (loss), excluding depreciation, amortization and impairment expenses, decreased from income of $37.6 million in 2015 to a loss of $16.4 million in 2016. Additionally, the change in operating assets and liabilities decreased from a $38.3 million cash inflow in 2015 to a $19.8 million cash inflow in 2016 due to an increase in accounts receivable attributable to higher business activity levels in the fourth quarter of 2016 as compared to 2015, partially offset by the timing of payments of our accounts payable.

Investing Activities

Net cash used in investing activities increased to $189.6 million for the nine months ended September 30, 2017, from $18.2 million during the nine months ended September 30, 2016. The increase was primarily attributable to the additional hydraulic fracturing units and other ancillary equipment purchased during the period, and a slight increase in maintenance capital expenditures, during the nine months ended September 30, 2017, compared to the nine months ended September 30, 2016.

Net cash used in investing activities was $41.7 million and $62.8 million for the years ended December 31, 2016 and 2015, respectively. The decrease was primarily due to the addition of one hydraulic fracturing unit in January 2015 and a decline in capital expenditures in response to lower activity levels in 2016. Approximately 97.8% of our capital expenditures during 2016 is related to maintenance of equipment.

Financing Activities

Net cash provided by financing activities was $28.3 million for the nine months ended September 30, 2017, and net cash used in financing activities was $5.2 million for the nine months ended September 30, 2016. The net increase in cash provided was primarily due to the receipt of $185.5 million of IPO proceeds, partially offset by payment of IPO costs of $15.1 million, repayment of insurance financing of $2.9 million, debt issuance cost of $1.7 million and $164.6 million in repayment of borrowings, during the nine months ended September 30, 2017, compared to net cash used of $42.4 million for repayment of borrowings, repayment of insurance financing of $2.8 million, debt extinguishment and issuance cost of $0.6 million, offset by the equity capitalization proceeds of $40.4 million during the nine months ended September 30, 2016.

Net cash provided by financing activities was $130.3 million for the year ended December 31, 2016, and net cash used in financing activities was $15.2 million for the year ended December 31, 2015. The change was primarily due to a $210.4 million increase in equity capitalization, $40.4 million common equity and $170.0 million preferred equity, partially offset by a $28.2 million increase in net repayments of borrowings, $7.5 million of transaction costs occurred related to the private placement and $30.0 million extinguishment of debt during 2016. In 2015, we entered into a new equipment financing arrangement relating to three hydraulic fracturing units, where we extended the amortization period from 13 to 36 months and reduced the amount of required monthly installment payments.

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Credit Facility and Other Financing Arrangements

Revolving Credit Facility

On March 22, 2017, the Company entered into a revolving credit facility with a $150 million borrowing capacity (the “revolving credit facility”). Borrowings under the revolving credit facility accrue interest based on a three‑tier pricing grid tied to availability, and we may elect for loans to be based on either LIBOR or base rate, plus the applicable margin, which ranges from 1.75% to 2.25% for LIBOR loans and 0.75% to 1.25% for base rate loans, with no LIBOR floor. Borrowings under the revolving credit facility are secured by a first priority lien and security interest in substantially all assets of the Company. The revolving credit facility has a tenor of 5 years and a borrowing base of 85% of eligible accounts receivables less customary reserves. Under this facility we are required to comply, subject to certain exceptions and materiality qualifiers, with certain customary affirmative and negative covenants, including, but not limited to, covenants pertaining to our ability to incur lien, indebtedness, changes in the nature of our business, mergers and other fundamental changes, disposal of assets, investments and restricted payments, amendments to our organizational documents or accounting policies, making prepayments of certain debt, dividends, transactions with affiliates, and certain other activities. In addition, the revolving credit facility includes a Springing Fixed Charge Coverage Ratio (“FCCR”) of 1.0x when excess availability is less than the greater of (i) 10% of the lesser of the facility size and the borrowing base (as set forth in the revolving credit facility) and (ii) $12 million. The revolving credit facility has a commitment fee of 0.25% if the utilization is greater than 50% of the borrowing base, otherwise it is 0.375%.

Equipment Financing Arrangements

On November 24, 2015, we entered into a 36‑month equipment financing arrangement for three hydraulic fracturing units, and received proceeds of $25.0 million. A portion of the proceeds were used to pay off manufacturer notes, and the remainder was used for additional liquidity.

On June 30, 2017, we entered into a financing arrangement for the purchase of light vehicles. As of September 30, 2017, we purchased certain light vehicles under this financing arrangement in the amount of $2.1 million.

Off Balance Sheet Arrangements

We had no off balance sheet arrangements as of September 30, 2017.

Capital Requirements

Capital expenditures incurred were $206.3 million during the nine months ended September 30, 2017 as compared to $21.9 million during the nine months ended September 30, 2016. The increase was primarily attributable to additional property and equipment purchased.

Capital expenditures were $46.0 million in 2016 and $71.7 million in 2015.

Our capital expenditures, maintenance costs and other expenses, including labor, proppant and fuel costs have increased commensurately with our organic fleet growth and increase in overall hydraulic fracturing fleet utilization to 100% utilization since September 2016.

Customer Concentration

For the year ended December 31, 2016, sales to Parsley Energy and Diamondback Energy accounted for 18.0% and 12.5%, respectively, of total revenue. No other customer accounted for more than 10% of total revenue for the year ended December 31, 2016.

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Contractual Obligations

The following table presents our contractual obligations and other commitments as of December 31, 2016 (in thousands).

	Total		Less than 1 year		1 - 3 years		3 - 5 years		More than 5 years
6.25% Term loan(1)	$	173,267	$	21,340	$	151,927	$	—	$	—
Revolving Credit Facility	13,500		—		13,500		—		—
Equipment refinancing(2)	22,115		7,773		14,342		—		—
Operating leases(3)	2,382		471		793		688		430
Total contractual obligations	$	211,264	$	29,584	$	180,562	$	688	$	430

____________________

(1) Includes estimated interest cost at an interest rate of 6.25% plus rate with a 1% floor, per the terms of our Term Loan. As the Eurodollar Rate is floating and cannot be determined with accuracy for future periods, the floor rate of 1% was utilized to calculate anticipated future interest payments.

(2) Equipment refinancing includes estimated interests costs of $2.9 million.

(3) Operating leases include agreements for various office locations.

Quantitative and Qualitative Disclosure of Market Risks

Market risk is the risk of loss arising from adverse changes in market rates and prices. Historically, our risks have been predominantly related to potential changes in the fair value of our long‑term debt due to fluctuations in applicable market interest rates. Going forward our market risk exposure generally will be limited to those risks that arise in the normal course of business, as we do not engage in speculative, non‑operating transactions, nor do we utilize financial instruments or derivative instruments for trading purposes.

Commodity Price Risk

Our material and fuel purchases expose us to commodity price risk. Our material costs primarily include the cost of inventory consumed while performing our pressure pumping services such as proppants, chemicals, guar, trucking and fluid supplies. Our fuel costs consist primarily of diesel fuel used by our various trucks and other motorized equipment. The prices for fuel and the raw materials in our inventory are volatile and are impacted by changes in supply and demand, as well as market uncertainty and regional shortages. Historically, we have generally been able to pass along price increases to our customers; however, we may be unable to do so in the future. We do not engage in commodity price hedging activities.

Interest Rate Risk

We may be subject to interest rate risk on variable rate debt under our credit facility. The Company also has fixed rate debt. The impact of a 1% increase in interest rates on our outstanding debt as of September 30, 2017 and 2016 would have resulted in an increase in interest expense and corresponding decrease in pre‑tax income of approximately $0.1 million and $1.6 million, for the nine months ended September 30, 2017 and 2016, respectively.

Credit Risk

Financial instruments that potentially subject us to concentrations of credit risk are trade receivables. We extend credit to customers and other parties in the normal course of business. We have established various procedures to manage our credit exposure, including credit evaluations and maintaining an allowance for doubtful accounts.

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Internal Controls and Procedures

We are required to comply with the SEC’s rules implementing Section 302 of the Sarbanes‑Oxley Act of 2002, which requires our management to certify financial and other information in our quarterly and annual reports and provide an annual management report on the effectiveness of our internal control over financial reporting. We will not be required to make our first assessment of our internal control over financial reporting until the year of our second annual report required to be filed with the SEC.

Our independent registered public accounting firm is not yet required to formally attest to the effectiveness of our internal controls over financial reporting, and will not be required to do so for as long as we are an “emerging growth company” pursuant to the provisions of the JOBS Act. Please read “Summary — Our Emerging Growth Company Status.”

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (ASU) No. 2014‑09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014‑09 requires entities to recognize revenue to depict transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU No. 2014‑09 requires entities to disclose both qualitative and quantitative information that enables users of the consolidated financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, including disclosure of significant judgments affecting the recognition of revenue. ASU No. 2014‑09 was originally effective for annual periods beginning after December 15, 2016, using either the retrospective or cumulative effect transition method. On August 12, 2015, the FASB issued ASU No. 2015‑14, which defers the effective date of the revenue standard, ASU No. 2014‑09, by one year for all entities and permits early adoption on a limited basis. We have completed our preliminary evaluation of ASU No. 2014-09, and the adoption of this guidance will not materially affect our revenue recognition. However, there will be additional disclosures on our consolidated financial statements relating to the adoption of this standard.

In July 2015, the FASB issued ASU No. 2015‑11, Simplifying the Measurement of Inventory, which requires entities to measure most inventory “at the lower of cost and net realizable value,” thereby simplifying the current guidance under which an entity must measure inventory at the lower of cost or market. ASU No. 2015‑11 does not apply to inventories that are measured by using either the last‑in, first‑out method or the retail inventory method. The amendments in ASU No. 2015‑11 are effective for fiscal years beginning after December 15, 2016. The ASU became effective for us in 2017 and the adoption of this guidance did not materially affect our consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016‑02, Leases, a new standard on accounting for leases. The ASU introduces a lessee model that brings most leases on the balance sheet. The new standard also aligns many of the underlying principles of the new lessor model with those in the current accounting guidance as well as the FASB’s new revenue recognition standard. However, the ASU eliminates the use of bright‑line tests in determining lease classification as required in the current guidance. The ASU also requires additional qualitative disclosures along with specific quantitative disclosures to better enable users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The new standard is effective for annual reporting periods beginning after December 15, 2018, including periods within that reporting period, using a modified retrospective approach. Early adoption is permitted. We have not completed an evaluation of the impact the pronouncement will have on our consolidated financial statements and related disclosures.

In March 2016, the FASB issued ASU No. 2016‑09, Compensation‑ Stock Compensation (Topic 718): Improvements to Employee Share‑Based Payment Accounting, which modifies several aspects of the accounting for share‑based payment transactions including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The new

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standard is effective for fiscal years and interim periods beginning after December 15, 2016, with early adoption permitted. The ASU became effective for us in 2017 and the adoption of this guidance did not materially affect our consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017‑04, Simplifying the Test for Goodwill Impairment, which removes the requirement to compare the implied fair value of goodwill with its carrying amount as part of step two of the goodwill impairment test. As a result, under this ASU, an entity would recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. This pronouncement is effective for impairment tests in fiscal years beginning after December 15, 2019, on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We believe that the adoption of this guidance will not materially affect our consolidated financial statements.

Emerging Growth Company

We qualify as an “emerging growth company” pursuant to the provisions of the JOBS Act, enacted on April 5, 2012. Section 102 of the JOBS Act provides that an “emerging growth company” can take advantage of the extended transition period provided in Section 7(a)(2)(B) of the Securities Act for complying with new or revised accounting standards. However, we are choosing to “opt‑out” of such extended transition period, and as a result, we will comply with new or revised accounting standards on the relevant dates on which adoption of such standards is required for non‑emerging growth companies. Our election to “opt‑out” of the extended transition period is irrevocable.

Critical Accounting Policies and Estimates

The discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with accounting principles generally acceptable in the United States of America. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the financial statements and the reported revenues and expenses during the reporting periods. We evaluate these estimates and assumptions on an ongoing basis and base our estimates on historical experience, current conditions and various other assumptions that we believe to be reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Our actual results may materially differ from these estimates.

Listed below are the accounting policies that we believe are critical to our financial statements due to the degree of uncertainty regarding the estimates or assumptions involved, and that we believe are critical to the understanding of our operations.

Property and Equipment

Our property and equipment are recorded at cost, less accumulated depreciation.

Upon sale or retirement of property and equipment, the cost and related accumulated depreciation are removed from the balance sheet and the net amount, less proceeds from disposal, is recognized as a gain or loss in earnings.

We retired certain components of equipment rather than entire pieces of equipment, which resulted in a net loss on disposal of assets of $29.0 million and $12.9 million for the nine months ended September 30, 2017 and 2016, respectively. For the years ended December 31, 2016 and 2015, we recorded a net loss on disposal of assets of $22.5 million and $21.3 million, respectively.

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Depreciation of property and equipment is provided on the straight‑line method over estimated useful lives as shown in the table below. The estimated useful lives and salvage values of property and equipment is subject to key assumptions such as maintenance, utilization and job variation. Unanticipated future changes in these assumptions could negatively or positively impact our net income. A 10% change in the useful lives of our property and equipment would have resulted in a $3.9 million and $4.3 million impact on net loss during the nine months ended September 30, 2017 and the year ended December 31, 2016, respectively.

Vehicles	1-5 years
Equipment	1-20 years
Buildings and improvements	5-20 years

Impairment of Long-Lived Assets

In accordance with the Financial Accounting Standards Board Accounting Standards Codification 360 regarding Accounting for the Impairment or Disposal of Long‑Lived Assets, we review the long‑lived assets to be held and used whenever events or circumstances indicate that the carrying value of those assets may not be recoverable. An impairment loss is indicated if the sum of the expected future undiscounted cash flows attributable to the assets is less than the carrying amount of such assets. In this circumstance, we recognize an impairment loss for the amount by which the carrying amount of the asset exceeds the fair value of the asset. Our cash flows forecasts require us to make certain judgements regarding long‑term forecasts of future revenue and costs and cash flows related to the assets subject to review. The significant assumption in our cash flow forecasts is our future growth expectations. The significant assumption is uncertain in that it is driven by future demand for our services and utilization which could be impacted by crude oil market prices, future market conditions and technological advancements. Our fair value estimates for certain long‑lived assets require us to use significant other observable inputs among others including significant assumptions related to market approach based on recent auction sales or selling prices of comparable equipment. The estimates of fair value are also subject to significant variability, are sensitive to changes in market conditions, and are reasonably likely to change in the future. No events or changes in circumstances occurred that would indicate a potential impairment of property and equipment during the nine months ended September 30, 2017 or 2016. We recorded an impairment loss of $6.3 million during the fourth quarter of 2016 related to our Permian drilling asset group, as our cash flow forecasts were negatively impacted with the idling of these rigs during the fourth quarter. The fair value estimate also declined as observable market inputs, such as recent auction sales also decreased.

If the crude oil market declines or the demand for vertical drilling does not recover, and if our equipment remains idle or under‑utilized, the estimated fair value of such equipment may decline, which could result in additional impairment charges. Though the impacts of variations in any of these factors can have compounding or off‑setting impacts, a 10% decline in the estimated fair value of our Permian drilling assets at December 31, 2016 would result in additional impairment of $0.9 million, and a 10% decline in the estimated future cash flows for our other asset groups would not indicate an impairment.

Goodwill

Goodwill is the excess of the consideration transferred over the fair value of the tangible and identifiable intangible assets and liabilities recognized. Goodwill is not amortized. We perform an annual impairment test of goodwill as of December 31, or more frequently if circumstances indicate that impairment may exist.

There were no additions to, or disposal of, goodwill during the nine months ended September 30, 2017 and 2016. We performed our annual goodwill impairment test in accordance with ASC 350 on December 31, 2016, at which time, we determined that the fair value of our hydraulic fracturing reporting

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unit was substantially in excess of its carrying value and the fair value of our surface drilling reporting unit was less than its carrying value, resulting in the impairment of the entire $1.2 million of our surface drilling goodwill. The hydraulic fracturing and surface drilling operating segments are the only two segments which have goodwill. The quantitative impairment test we perform for goodwill utilizes certain assumptions, including forecasted revenue and cost assumptions. If the crude oil market declines and remains at low levels for a sustained period of time, we could record an impairment of the carrying value of our goodwill in the future. If crude oil prices decline further or remain at low levels, to the extent appropriate we expect to perform our goodwill impairment assessment on a more frequent basis to determine whether an impairment is required. Our discounted cash flow analysis for each reporting unit includes significant assumptions regarding discount rates, revenue growth rates, expected profitability margin, forecasted capital expenditures, the timing of an anticipated market recovery, and the timing of expected cash flow. As such, these analyses incorporate inherent uncertainties that are difficult to predict in volatile economic environments and could result in impairment charges in future periods if actual results materially differ from the estimated assumptions utilized in our forecast.

Income Taxes

Income taxes are accounted for under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of differences between the consolidated financial statements and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.

We recognize deferred tax assets to the extent that we believe these assets are more likely than not to be realized. In making such a determination, we consider all positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, and the results of recent operations. If we determine that we would be able to realize our deferred tax assets in the future in excess of their net recorded amount, we would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes. In determining the valuation allowance of $2.2 million for the nine months ended September 30, 2017, we have considered and made judgments and estimates regarding estimated future taxable income. These estimates and judgments include some degree of uncertainty and changes in these estimates and assumptions could require us to adjust the valuation allowances for our deferred tax assets and the ultimate realization of tax assets depends on the generation of sufficient taxable income.

Our methodology for recording income taxes requires a significant amount of judgment in the use of assumptions and estimates. Additionally, we forecasts certain tax elements, such as future taxable income, as well as evaluate the feasibility of implementing tax planning strategies. Given the inherent uncertainty involved with the use of such variables, there can be significant variation between anticipated and actual results. Unforeseen events may significantly impact these variables, and changes to these variables could have a material impact on our income tax accounts. The final determination of our income tax liabilities involves the interpretation of local tax laws and related authorities in each jurisdiction. Changes in the operating environments, including changes in tax law, could impact the determination of our income tax liabilities for a tax year.

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BUSINESS

Overview

We are a growth‑oriented, Midland, Texas‑based oilfield services company providing hydraulic fracturing and other complementary services to leading upstream oil and gas companies engaged in the exploration and production, or E&P, of North American unconventional oil and natural gas resources. Our operations are primarily focused in the Permian Basin, where we have cultivated longstanding customer relationships with some of the region’s most active and well‑capitalized E&P companies. The Permian Basin is widely regarded as the most prolific oil‑producing area in the United States, and we believe we are one of the largest providers of hydraulic fracturing services in the region by hydraulic horsepower, or HHP, with an aggregate deployed capacity of 690,000 HHP. Our fleet has been designed to handle the highest intensity, most complex hydraulic fracturing jobs, and has been 100% utilized since September 2016. In the quarter ended September 30, 2017, we put three new hydraulic fracturing units into service. We also deployed one additional new hydraulic fracturing unit in the fourth quarter of 2017, bringing our current fleet total to 16 deployed units. In addition, we have contracted to purchase one new hydraulic fracturing unit scheduled for delivery and deployment to dedicated customers by the end of the first quarter of 2018. This unit will provide us with an additional 45,000 HHP, bringing our aggregate capacity to 735,000 HHP.

Our modern hydraulic fracturing fleet has been designed to handle Permian Basin specific operating conditions and the region’s increasingly high‑intensity well completions, which are characterized by longer horizontal wellbores, more frac stages per lateral and increasing amounts of proppant per well. Over 75% of our fleet has been delivered over the past four years, and approximately 85% of our fleet has been built by a single manufacturer since 2013. Further, we have fully maintained our equipment throughout the recent industry downturn to ensure optimal performance and reliability. In contrast, we believe many of our competitors have deferred necessary maintenance capital spending throughout the downturn, which we believe positions us to respond more quickly and reliably to customer needs during the ongoing market recovery.

In addition to our core hydraulic fracturing operations, we also offer a suite of complementary well completion and production services, including cementing, acidizing, coiled tubing, flowback services, Permian drilling and surface air drilling. We believe these complementary services create operational efficiencies for our customers and allow us to capture a greater portion of their capital spending across the lifecycle of an unconventional well. We believe that these complementary services should benefit from a continued industry recovery and that we are well positioned to continue expanding these offerings in response to our customers’ increasing service needs and spending levels.

Our primary business objective is to serve as a strategic partner to our customers. We achieve this objective by providing reliable, high‑quality services that are tailored to our customers’ needs and synchronized with their well development programs. This alignment assists our customers in optimizing the long‑term development of their unconventional resources. Over the past four years, we have leveraged our strong Permian Basin relationships to grow our installed HHP capacity by over four times and organically build our Permian Basin cementing, coiled tubing and acidizing lines of business. Consistent with past performance, we believe our substantial market presence will continue to yield a variety of actionable growth opportunities allowing us to expand both our hydraulic fracturing and complementary services going forward. To this end, we intend to continue our past practice of opportunistically deploying new equipment on a long‑term, dedicated basis in response to specific customer demand.

For the years ended December 31, 2016 and 2015, we generated net losses of approximately $(53.1) million and $(45.9) million, respectively, and Adjusted EBITDA of approximately $7.8 million and $60.1 million, respectively. Over these same years, approximately 94% and 90% of our revenues, respectively, were generated from our pressure pumping segment, which includes our hydraulic fracturing, cementing and acidizing services. For the definition of Adjusted EBITDA and a reconciliation from its most directly

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comparable financial measure calculated and presented in accordance with GAAP, please read “Selected Historical Financial Data.”

Recent Developments

On March 16, 2017, the registration statement on Form S-1 (File No. 333-215940) relating to our initial public offering (the “IPO”) was declared effective by the SEC. The IPO closed on March 22, 2017, at which time we issued and sold 13,250,000 shares of common stock, and certain selling shareholders sold 11,750,000 shares of common stock, at a price to the public of $14.00 per share. We received cash proceeds of approximately $170.1 million from this transaction, net of underwriting discounts and commissions and offering expenses, which we used (i) to repay $71.8 million in outstanding borrowings and accrued interest under our term loan, (ii) for the purchase of additional hydraulic fracturing fleets and ancillary equipment, and (iii) retained the balance for general corporate purposes.

In connection with the IPO, the Company executed a stock split, such that each holder of common stock of the Company received 1.45 shares of common stock for every one share of previous common stock. Accordingly, any information related to or dependent upon the share or option counts in our comparative 2016 and 2015 consolidated financial statements have been updated to reflect the effect of the stock split.

Our Services

We conduct our business through seven operating segments: hydraulic fracturing, cementing, acidizing, coil tubing, flowback, surface drilling and Permian drilling. For reporting purposes, the hydraulic fracturing, cementing and acidizing operating segments are aggregated into our one reportable segment: pressure pumping.

Pressure Pumping

Hydraulic Fracturing

We primarily provide hydraulic fracturing services to E&P companies in the Permian Basin. These services are intended to optimize hydrocarbon flow paths during the completion phase of horizontal shale wellbores. We have significant expertise in multi‑stage fracturing of horizontal oil‑producing wells in unconventional geological formations. As of November 1, 2017, we had grown our hydraulic fracturing business to a total of 16 hydraulic fracturing units with an aggregate of 690,000 HHP, of which 590,000 HHP has been delivered since 2013. Further, one additional hydraulic fracturing unit is scheduled for delivery and deployment to a dedicated customer by the end of the first quarter of 2018, which will increase our capacity to an aggregate of 735,000 HHP. We have ordered an additional 86 Tier 2 diesel engines that are scheduled to be delivered by the end of 2017, which will support our long-term plans for optimizing the total capacity and operational performance of our fleet. We have also continued our transition from carbon to stainless fluid ends, and we remain on schedule to be fully converted by the end of 2017.

The fracturing process consists of pumping a fracturing fluid into a well at sufficient pressure to fracture the formation. Materials known as proppants, which in our business are comprised primarily of sand, are suspended in the fracturing fluid and are pumped into the fracture to prop it open. The fracturing fluid is designed to “break,” or loosen viscosity, and be forced out of the formation by its pressure, leaving the proppants suspended in the fractures created, thereby increasing the mobility of the hydrocarbons. As a result of the fracturing process, production rates are usually enhanced substantially, thus increasing the rate of return of hydrocarbons for the operator.

We own and operate a fleet of mobile hydraulic fracturing units and other auxiliary equipment to perform fracturing services. We refer to all of our fracturing units, other equipment and vehicles necessary

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to perform fracturing jobs as our “fleet” and the personnel assigned to each unit as a “crew.” Our hydraulic fracturing units consist primarily of a high pressure hydraulic pump, a diesel engine, a transmission and various hoses, valves, tanks and other supporting equipment that are typically mounted to a flat‑bed trailer.

We provide dedicated equipment, personnel and services that are tailored to meet each of our customer’s needs. Each unit in our fleet has a designated team of personnel, which allows us to provide responsive and customized services, such as project design, proppant and other consumables procurement, real‑time data provision and post‑completion analysis for each of our jobs. Many of our hydraulic fracturing units and associated personnel have continuously worked with the same customer for the past several years promoting deep relationships and a high degree of coordination and visibility into future customer activity levels. Furthermore, in light of our substantial market presence and historically high fleet utilization levels, we have established a variety of entrenched relationships with key equipment, sand and other downhole consumable suppliers, including over 25 sand suppliers utilized in 2017. These strategic relationships ensure ready access to equipment, parts and materials on a timely and economic basis and allow our dedicated procurement logistics team to ensure consistently safe and reliable operations.

Cementing

We provide cementing services for completion of new wells and remedial work on existing wells. Cementing services use pressure pumping equipment to deliver a slurry of liquid cement that is pumped down a well between the casing and the borehole. Cementing provides isolation between fluid zones behind the casing to minimize potential damage to hydrocarbon bearing formations or the integrity of freshwater aquifers, and provides structural integrity for the casing by securing it to the earth. Cementing is also done when recompleting wells, where one zone is plugged and another is opened.

We currently operate a total of 14 cementing units, with eight units operating in the Permian Basin and six units operating in the Uinta‑Piceance Basin. We believe that our cementing segment provides an organic growth opportunity for us to expand our service offerings within our existing customer base.

Acidizing

We operate 10 acidizing pumps and four combination units in the Permian Basin, together totaling approximately 22,000 HHP, which perform procedures like toe preps, pump downs and foamed acid. Acidizing is a stimulation technique where acid is injected under pressure into formations (typically carbonate reservoirs) which can form or expand fissures. We believe that our acidizing operations provide an organic growth opportunity for us to expand our service offerings within our existing customer base.

Other Services

Coiled Tubing

Coiled tubing services involve injecting coiled tubing into wells to perform various completion well intervention operations. Coiled tubing is a flexible steel pipe with a diameter of typically less than three inches and manufactured in continuous lengths of thousands of feet. It is wound or coiled on a truck‑mounted reel for onshore applications. Due to its small diameter, coiled tubing can be inserted into existing production tubing and used to perform a variety of services to enhance the flow of oil or natural gas.

The principal advantages of using coiled tubing include the ability to (i) continue production from the well without interruption, thus reducing the risk of formation damage, (ii) move continuous coiled tubing in and out of a well significantly faster than conventional pipe in the case of a workover rig, which must be jointed and unjointed, (iii) direct fluids into a wellbore with more precision, allowing for improved

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stimulation fluid placement, (iv) provide a source of energy to power a downhole motor or manipulate down‑holetools and (v) enhance access to remote fields due to the smaller size and mobility.

As of September 30, 2017, we had one 2”, one 2³/₈” and one 1¹/₄” coiled tubing unit, all of which were operating in the Permian Basin. We believe these units are well suited for the performance requirements of the unconventional resource markets we serve. The average age of these units is less than four years old.

Flowback Services

Our flowback services consist of production testing, solids control, hydrostatic testing and torque services. Flowback involves the process of allowing fluids to flow from the well following a treatment, either in preparation for an impending phase of treatment or to return the well to production. Our flowback equipment consists of manifolds, accumulators, valves, flare stacks and other associated equipment that combine to form up to a total of five well‑testing spreads. We provide flowback services in the Permian Basin and mid‑continent markets.

Surface Air Drilling

We currently operate a surface air drilling operation in the Uinta‑Piceance Basin, which is capable of offering cost‑effective, pre‑set surface air drilling services to target depths of approximately 4,000 feet in areas of fragile geology. Air drilling is a technique in which oil, natural gas, or geothermal wells are drilled by creating a pressure within the well that is lower than the reservoir pressure, which results in increased rates of penetration, reduced formation damage and reduced drilling costs. This division is uniquely suited to the fragile geology of the Uinta‑Piceance Basin and is highly complementary to our cementing offering.

Competitive Strengths

Our primary business objective is to serve as a strategic partner for our customers. We achieve this objective by providing reliable, high‑quality services that are tailored to our customers’ needs and synchronized with their well development programs. This alignment assists our customers in optimizing the long‑term development of their unconventional resources. We believe that the following competitive strengths differentiate us from our peers and uniquely position us to achieve our primary business objective.

• Strong market position in the Permian Basin. We believe we are one of the largest hydraulic fracturing providers by HHP in the Permian Basin, which is the most prolific oil producing area in the United States. Our longstanding customer relationships and substantial Permian Basin market presence uniquely position us to continue growing in tandem with the basin’s ongoing development. The Permian Basin is a mature, liquids‑rich basin with well‑known geology and a large, exploitable resource base that delivers attractive E&P producer economics at or below current commodity prices. As a result of its significant size, coupled with the presence of multiple prospective geologic benches and other favorable characteristics, the Permian Basin has become widely recognized as the most attractive and economic oil resource in North America.

Our operational focus has historically been in the Permian Basin’s Midland sub‑basin in support of our customers’ core operations. More recently, however, many of our customers (including Callon Petroleum, Diamondback Energy, Parsley Energy, RSP Permian and XTO Energy) have made sizeable acquisitions in the Delaware Basin. We anticipate that many of these customers will request our services in the Delaware Basin to help develop their acreage, and we believe that we are uniquely positioned to capture a large addressable growth opportunity as the basin develops. For the foreseeable future, we expect both the Midland Basin and the Delaware Basin to continue to command a disproportionate share of future North American E&P spending.

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• Hydraulic fracturing is highly levered to increasing drilling activity and completion intensity levels. The combination of an expanding Permian Basin horizontal rig count and more complex well completions has a compounding effect on HHP demand growth. Horizontal drilling has become the default method for E&P operators to most economically extract unconventional resources, and the number of horizontal rigs has increased from 22% of the total Permian Basin rig count in December 2011 to approximately 89% of the Permian Basin rig count at the end of October 2017. As the horizontal rig count has grown, well completion intensity levels have also increased as a result of longer wellbore lateral lengths, more fracturing stages per foot of lateral and increasing amounts of proppant per stage. Furthermore, the ongoing improvement in drilling and completion efficiencies, driven by innovations such as multi‑well pads and zipper fracs, have further increased the demand for HHP. Taken together, these demand drivers have helped contribute to the full utilization of our fleet and leave us well positioned to capture future organic growth opportunities and enhanced pricing for the services we offer.

• Deep relationships and operational alignment with high‑quality, Permian Basin‑focused customers. Our deep local roots, operational expertise and commitment to safe and reliable service have allowed us to cultivate longstanding customer relationships with the most active and well‑capitalized Penman Basin operators. Our diverse customer base is comprised of market leaders such as Callon Petroleum, Diamondback Energy, Parsley Energy, Pioneer Natural Resources, Surge Energy and XTO Energy, with no single customer representing more than 20% of our revenue for the year ended December 31, 2016. Many of our current customers have worked with us since our inception and have integrated our fleet scheduling with their well development programs. This high degree of operational alignment and their continued support have allowed us to maintain relatively high utilization rates over time. As our customers increase activity levels, we expect to continue to leverage these strong relationships to keep our fleet fully utilized and selectively expand our platform in response to specific customer demand.

• Standardized fleet of modern, well‑maintained equipment We have a large, homogenous fleet of modem equipment that is configured to handle the Permian Basin’s most complex, highest‑intensity, hydraulic fracturing jobs. We believe that our fleet design is a key competitive advantage compared to many of our competitors who have fracturing units that are not optimized for Permian Basin conditions. Our fleet is largely standardized across units to facilitate efficient maintenance and repair, reducing equipment downtime and improving labor efficiency. Importantly, we have fully maintained our fleet throughout the recent industry downturn to ensure optimal performance and reliability. In contrast, we believe many of our competitors have deferred necessary maintenance capital spending and cannibalized essential equipment for spare parts during the same period. Furthermore, our entrenched relationships with a variety of key suppliers and vendors provide us with the reliable access to the equipment necessary to support our continued organic growth strategy.

• Proven cross‑cycle financial performance. Over the past several years, we have maintained relatively high cross‑cycle fleet utilization rates. Since September 2016, our fleet has been 100% utilized, and for each of the years ended December 31, 2015 and 2016 and the quarter ended September 30, 2017, we operated in excess of 65% utilization. Our consistent track record of steady organic growth, coupled with our ability to immediately deploy new HHP on a dedicated and fully utilized basis, has resulted in revenue growth across industry cycles. We believe that we will be able to grow faster than our competitors while preserving attractive EBITDA margins as a result of our differentiated service offerings and a robust backlog of demand for our services. Furthermore, we believe that our philosophy of maintaining modest financial leverage and a healthy balance sheet has left us more conservatively capitalized than our peers. Several of our customers have recently requested additional HHP capacity from us, and we expect that improving market fundamentals, our superior execution and our customer‑focused approach should result in enhanced financial performance going forward.

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• Seasoned management and operating team and exemplary safety record. We have a seasoned executive management team, with our three most senior members contributing more than 100 years of collective industry and financial experience. Members of our management team founded our business and seeded our company with a portion of our original investment capital. We believe their track record of successfully building premier oilfield service companies in the Permian Basin, as well as their deep roots and relationships throughout the West Texas community, provide a meaningful competitive advantage for our business. In addition, our management team has assembled a loyal group of highly‑motivated and talented divisional managers and field personnel, and we have had virtually no manager‑level turnover in our core service divisions over the past three years. We employ a balanced decision‑making structure that empowers managerial and field personnel to work directly with customers to develop solutions while leveraging senior management’s oversight. This collaborative approach fosters strong customer links at all levels of the organization and effectively institutionalizes customer relationships beyond the executive suite. We promote a “Safety First” culture, which has led to a Total Recordable Incident Rate, or TRIR, well below industry averages. For example, for the year ended December 31, 2016, we had a TRIR of 0.9, compared to a peer average of 2.5 for the year ended December 31, 2014.

Business Strategies

We intend to achieve our primary business objective through the following business strategies:

• Capture an increasing share of rising demand for hydraulic fracturing services in the Permian Basin. We intend to continue to position ourselves as a Permian Basin‑focused hydraulic fracturing business, as we believe the Permian Basin hydraulic fracturing market offers supportive long‑term growth fundamentals. These fundamentals are characterized by increased demand for our HHP, driven by increasing drilling activity and well completion intensity levels, along with underinvestment by our competitors in their equipment. We are currently operating at 100% utilization, and several of our customers have requested additional HHP capacity from us. As our customers continue to develop their assets in the Midland Basin and Delaware Basin, we believe we are strategically positioned to deploy additional hydraulic fracturing equipment in support of their ongoing needs. Further, we have contracted to purchase one new additional hydraulic fracturing unit, which is expected to be delivered before the end of the first quarter of 2018. This unit will provide us with an additional 45,000 HHP, bringing our total capacity to 735,000 HHP.

• Capitalize on improving pricing and efficiency gains. The increase in demand for HHP coupled with expected competitor equipment attrition is expected to drive more favorable hydraulic fracturing supply and demand fundamentals. We believe this market tightening may lead to a general increase in prices for hydraulic fracturing services. Furthermore, our consistently high fleet utilization levels and 24 hours per day, seven days per week operating schedule (with approximately 90% of our fleet currently operating on such a schedule, as compared to 2014, when the majority of our services were provided during daylight hours) should result in greater revenue opportunity and enhanced margins as fixed costs are spread over a broader revenue base. We believe that any incremental future fleet additions will benefit from these trends and associated economies of scale.

• Cross‑sell our complementary services. In addition to our hydraulic fracturing services, we offer a broad range of complementary services in support of our customers’ development activities, including cementing, acidizing, coiled tubing, flowback services and surface air drilling. These complementary services create operational efficiencies for our customers, and allow us to capture a greater percentage of their capital spending across the lifecycle of an unconventional well. We believe that, as our customers increase spending levels, we are well positioned to continue cross‑selling and growing our complementary service offerings.

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• Maintain financial stability and flexibility to pursue growth opportunities. Consistent with our historical practices, we plan to continue to maintain a conservative balance sheet, which will allow us to better react to potential changes in industry and market conditions and opportunistically grow our business. In the near term, we intend to continue our past practice of aligning our growth capital expenditures with visible customer demand, by strategically deploying new equipment on a long‑term, dedicated basis in response to inbound customer requests. We will also selectively evaluate potential strategic acquisitions that increase our scale and capabilities or diversify our operations.

Properties

Our corporate headquarters are located at 1706 S. Midkiff, Bldg. B, Midland, Texas 79701. In addition to our headquarters, we also lease nine properties that are used for field offices, yards or storage. We believe that our facilities are adequate for our current operations.

Our Customers

Our customers consist primarily of oil and natural gas producers in North America. Our top five customers accounted for approximately 58% and 53% of our revenue, for the years ended December 31, 2016 and 2015, respectively. During the year ended December 31, 2016, Parsley Energy accounted for 18.0% and Diamondback Energy accounted for 12.5%, respectively, of our total revenue.

Our Relationship with Energy Capital Partners

Our principal shareholder is Energy Capital Partners.

Energy Capital Partners, together with its affiliate funds and related persons, is a private equity firm with over $13.5 billion in capital commitments that is focused on investing in North America’s energy infrastructure. Energy Capital Partners has significant energy and financial expertise to complement its investment in us, including investments in power generation, midstream oil and gas, oilfield services, environmental infrastructure and energy services sectors.

We believe that our relationship with Energy Capital Partners is a competitive advantage, as it brings significant financial and management experience, which we believe it will use to help support our business, and also relationships throughout the energy industry.

Competition

The markets in which we operate are highly competitive. To be successful, an oilfield services company must provide services that meet the specific needs of oil and natural gas exploration and production companies at competitive prices. Competitive factors impacting sales of our services are price, reputation and technical expertise, service and equipment quality, and health and safety standards. Although we believe our customers consider all of these factors, we believe price is a key factor in E&P companies’ criteria in choosing a service provider. While we seek to price our services competitively, we believe many of our customers elect to work with us based on our deep local roots, operational expertise, equipment’s ability to handle the most complex Permian Basin well completions, and commitment to safety and reliability.

We provide our services primarily in the Permian Basin, and we compete against different companies in each service and product line we offer. Our competition includes many large and small oilfield service companies, including the largest integrated oilfield services companies. Our major competitors for hydraulic fracturing services, which make up the majority of revenues, include C&J Energy Services, Halliburton, Patterson‑UTI Energy Inc., RPC, Inc., Schlumberger, Superior Energy Services and a number of locally oriented businesses.

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Seasonality

Our results of operations have historically reflected seasonal tendencies, generally in the fourth quarter, relating to the conclusion of our customers’ annual capital expenditure budgets, the holidays and inclement winter weather during which we may experience declines in our operating results.

Operating Risks and Insurance

Our operations are subject to hazards inherent in the oilfield services industry, such as accidents, blowouts, explosions, fires and spills and releases that can cause personal injury or loss of life, damage or destruction of property, equipment, natural resources and the environment and suspension of operations.

In addition, claims for loss of oil and natural gas production and damage to formations can occur in the oilfield services industry. If a serious accident were to occur at a location where our equipment and services are being used, it could result in us being named as a defendant in lawsuits asserting large claims.

Because our business involves the transportation of heavy equipment and materials, we may also experience traffic accidents which may result in spills, property damage and personal injury.

Despite our efforts to maintain safety standards, we from time to time have suffered accidents in the past and anticipate that we could experience accidents in the future. In addition to the property damage, personal injury and other losses from these accidents, the frequency and severity of these incidents affect our operating costs and insurability and our relationships with customers, employees, regulatory agencies and other parties. Any significant increase in the frequency or severity of these incidents, or the general level of compensation awards, could adversely affect the cost of, or our ability to obtain, workers’ compensation and other forms of insurance, and could have other material adverse effects on our financial condition and results of operations.

We maintain commercial general liability, workers’ compensation, business auto, commercial property, umbrella liability, in certain instances, excess liability, and directors and officers insurance policies providing coverages of risks and amounts that we believe to be customary in our industry. Further, we have pollution legal liability coverage for our business entities, which would cover, among other things, third party liability and costs of clean‑up relating to environmental contamination on our premises while our equipment are in transit and while on our customers’ job site. With respect to our hydraulic fracturing operations, coverage would be available under our pollution legal liability policy for any surface or subsurface environmental clean‑up and liability to third parties arising from any surface or subsurface contamination. We also have certain specific coverages for some of our businesses, including for our hydraulic fracturing services.

Although we maintain insurance coverage of types and amounts that we believe to be customary in the industry, we are not fully insured against all risks, either because insurance is not available or because of the high premium costs relative to perceived risk. Further, insurance rates have in the past been subject to wide fluctuation and changes in coverage could result in less coverage, increases in cost or higher deductibles and retentions. Liabilities for which we are not insured, or which exceed the policy limits of our applicable insurance, could have a material adverse effect on us. See “Risk Factors” for a description of certain risks associated with our insurance policies.

Environmental and Occupational Health and Safety Regulations

Environmental, Health and Safety Matters and Regulation

Our operations are subject to stringent laws and regulations governing the discharge of materials into the environment or otherwise relating to environmental protection, and occupational health and safety.

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Numerous federal, state and local governmental agencies issue regulations that often require difficult and costly compliance measures that could carry substantial administrative, civil and criminal penalties and may result in injunctive obligations for non‑compliance. These laws and regulations may, for example, restrict the types, quantities and concentrations of various substances that can be released into the environment, limit or prohibit construction or drilling activities on certain lands lying within wilderness, wetlands, ecologically or seismically sensitive areas and other protected areas, or require action to prevent or remediate pollution from current or former operations. Moreover, it is not uncommon for neighboring landowners and other third parties to file claims for personal injury and property damage allegedly caused by the release of hazardous substances, hydrocarbons or other waste products into the environment. Changes in environmental, health and safety laws and regulations occur frequently, and any changes that result in more stringent and costly requirements could materially adversely affect our operations and financial position. We have not experienced any material adverse effect from compliance with these requirements. This trend, however, may not continue in the future.

Below is an overview of some of the more significant environmental, health and safety requirements with which we must comply. Our customers’ operations are subject to similar laws and regulations. Any material adverse effect of these laws and regulations on our customers operations and financial position may also have an indirect material adverse effect on our operations and financial position.

Waste Handling. We handle, transport, store and dispose of wastes that are subject to the Resource Conservation and Recovery Act (“RCRA”) and comparable state laws and regulations, which affect our activities by imposing requirements regarding the generation, transportation, treatment, storage, disposal and cleanup of hazardous and non‑hazardous wastes. With federal approval, the individual states administer some or all of the provisions of RCRA, sometimes in conjunction with their own, more stringent requirements. Although certain petroleum production wastes are exempt from regulation as hazardous wastes under RCRA, such wastes may constitute “solid wastes” that are subject to the less stringent requirements of non‑hazardous waste provisions.

Administrative, civil and criminal penalties can be imposed for failure to comply with waste handling requirements. Moreover, the EPA or state or local governments may adopt more stringent requirements for the handling of non‑hazardous wastes or recategorize some non‑hazardous wastes as hazardous for future regulation. Indeed, legislation has been proposed from time to time in Congress to recategorize certain oil and natural gas exploration, development and production wastes as hazardous wastes. Several environmental organizations have also petitioned the EPA to modify existing regulations to recategorize certain oil and natural gas exploration, development and production wastes as hazardous. Any such changes in these laws and regulations could have a material adverse effect on our capital expenditures and operating expenses. Although we do not believe the current costs of managing our wastes, as presently classified, to be significant, any legislative or regulatory reclassification of oil and natural gas exploration and production wastes could increase our costs to manage and dispose of such wastes.

Remediation of Hazardous Substances. The Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA” or “Superfund”) and analogous state laws generally impose liability without regard to fault or legality of the original conduct, on classes of persons who are considered to be responsible for the release of a hazardous substance into the environment. These persons include the current owner or operator of a contaminated facility, a former owner or operator of the facility at the time of contamination and those persons that disposed or arranged for the disposal of the hazardous substance at the facility. Liability for the costs of removing or remediating previously disposed wastes or contamination, damages to natural resources, the costs of conducting certain health studies, amongst other things, is strict and joint and several. In addition, it is not uncommon for neighboring landowners and other third parties to file claims for personal injury and property damage allegedly caused by the hazardous substances released into the environment. In the course of our operations, we use materials that, if released, would be subject to CERCLA and comparable state laws. Therefore, governmental agencies or third parties may seek to hold us responsible under CERCLA and comparable state statutes for all or part of the costs to clean up sites at which such hazardous substances have been released.

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One of our facilities in Midland, Texas is located within the boundaries of the West County Road 112 federal Superfund site, which site and the associated investigation and cleanup is being managed by EPA Region 6. The site’s soil and groundwater is contaminated with chromium and hexavalent chromium as a result of historic site operations unaffiliated with the Company and unassociated with the Company’s operations. Toxic tort claims also have been asserted as a result of this groundwater contamination against various unaffiliated parties. In 2013, in order to reduce the Company’s risk of incurring any future liabilities in connection with this site, the Company negotiated and obtained a bona fide prospective purchaser (“BFPP”) letter from EPA Region 6 in connection with a reorganization of the facility site ownership and lease. The BFPP letter generally acknowledges and provides that the Company is unaffiliated with any potentially responsible parties or known contamination that is the subject of the Superfund action, the Company agrees to comply with any future land use restrictions that may be imposed in connection with a site remedy (none have been imposed to date), and the Company agrees to cooperate with and provide access and assistance to EPA Region 6 in connection with the remediation. In exchange for these undertakings, the Company will not be subject to any CERCLA action by the EPA. In addition, the Company separately obtained a 10‑year environmental pollution legal liability insurance policy, effective March 4, 2013, with an aggregate limit of $20 million to insure against potential third‑party claims and any known or unknown pre‑existing conditions at the site, including Superfund or toxic tort liabilities. Both prior to and since obtaining the BFPP letter and the insurance policy, no claims have been made or threatened against the Company or any of its affiliated persons or entities with regard to this Superfund site or any related liabilities, and the Company has not incurred any significant expenses in connection with this matter.

NORM. In the course of our operations, some of our equipment may be exposed to naturally occurring radioactive materials (“NORM”) associated with oil and gas deposits and, accordingly may result in the generation of wastes and other materials containing NORM. NORM exhibiting levels of naturally occurring radiation in excess of established state standards are subject to special handling and disposal requirements, and any storage vessels, piping and work area affected by NORM may be subject to remediation or restoration requirements.

Water Discharges. The Clean Water Act, Safe Drinking Water Act, Oil Pollution Act and analogous state laws and regulations impose restrictions and strict controls regarding the unauthorized discharge of pollutants, including produced waters and other gas and oil wastes, into regulated waters. The discharge of pollutants into regulated waters is prohibited, except in accordance with the terms of a permit issued by the EPA or the state. Also, spill prevention, control and countermeasure plan requirements require appropriate containment berms and similar structures to help prevent the contamination of regulated waters.

Air Emissions. The Clean Air Act (“CAA”) and comparable state laws and regulations, regulate emissions of various air pollutants through the issuance of permits and the imposition of other emissions control requirements. The EPA has developed, and continues to develop, stringent regulations governing emissions of air pollutants from specified sources. New facilities may be required to obtain permits before work can begin, and existing facilities may be required to obtain additional permits and incur capital costs in order to remain in compliance. These and other laws and regulations may increase the costs of compliance for some facilities where we operate. Obtaining or renewing permits also has the potential to delay the development of oil and natural gas projects.

Climate Change. The EPA has determined that GHGs present an endangerment to public health and the environment because such gases contribute to warming of the earth’s atmosphere and other climatic changes. Based on these findings, the EPA has adopted and implemented, and continues to adopt and implement, regulations that restrict emissions of GHGs under existing provisions of the CAA. The EPA also requires the annual reporting of GHG emissions from certain large sources of GHG emissions in the United States, including certain oil and gas production facilities. The U.S. Congress has from time to time considered adopting legislation to reduce emissions of GHGs and almost one‑half of the states have already taken legal measures to reduce emissions of GHGs primarily through the planned development of

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GHG emission inventories and/or regional GHG cap and trade programs. And in December 2015, the United States joined the international community at the 21st Conference of the Parties of the United Nations Framework Convention on Climate Change in Paris, France. The resulting Paris Agreement calls for the parties to undertake “ambitious efforts” to limit the average global temperature, and to conserve and enhance sinks and reservoirs of greenhouse gases. The Paris Agreement entered into force in November 2016. On June 1, 2017, President Trump announced that the United States planned to withdraw from the Paris Agreement and to seek negotiations either to reenter the Paris Agreement on different terms or establish a new framework agreement. The Paris Agreement provides for a four‑year exit process beginning when it took effect in November 2016, which would result in an effective exit date of November 2020. The United States’ adherence to the exit process is uncertain and/or the terms on which the United States may reenter the Paris Agreement or a separately negotiated agreement are unclear at this time.

Moreover, climate change may cause more extreme weather conditions and increased volatility in seasonal temperatures. Extreme weather conditions can interfere with our operations and increase our costs, and damage resulting from extreme weather may not be fully insured.

Endangered and Threatened Species. Environmental laws such as the Endangered Species Act (“ESA”) and analogous state laws may impact exploration, development and production activities in areas where we operate. The ESA provides broad protection for species of fish, wildlife and plants that are listed as threatened or endangered. Similar protections are offered to migratory birds under the Migratory Bird Treaty Act and various state analogs. The U.S. Fish and Wildlife Service may identify previously unidentified endangered or threatened species or may designate critical habitat and suitable habitat areas that it believes are necessary for survival of a threatened or endangered species, which could cause us or our customers to incur additional costs or become subject to operating restrictions or operating bans in the affected areas.

Regulation of Hydraulic Fracturing and Related Activities. Our hydraulic fracturing operations are a significant component of our business. Hydraulic fracturing is an important and common practice that is used to stimulate production of hydrocarbons, particularly natural gas, from tight formations, including shales. The process, which involves the injection of water, sand and chemicals under pressure into formations to fracture the surrounding rock and stimulate production, is typically regulated by state oil and natural gas commissions. However, federal agencies have asserted regulatory authority over certain aspects of the process. For example, in May 2014, the EPA issued an Advanced Notice of Proposed Rulemaking seeking comment on the development of regulations under the Toxic Substances Control Act to require companies to disclose information regarding the chemicals used in hydraulic fracturing. Beginning in August 2012, the EPA issued a series of rules under the CAA that establish new emission control requirements for certain oil and natural gas production and natural gas processing operations and associated equipment. And in March 2015, the Bureau of Land Management (“BLM”) finalized a rule governing hydraulic fracturing on federal lands. In June 2016, a federal district court judge in Wyoming struck down the final rule, finding that the BLM lacked congressional authority to promulgate the rule. The BLM appealed that ruling. However, in July 2017, the BLM initiated a rulemaking to rescind the final rule and reinstate the regulations that existed immediately before the published effective date of the rule. In light of the BLM’s proposed rulemaking, in September 2017, the U.S. Court of Appeals for the Tenth Circuit dismissed the appeal and remanded with directions to vacate the lower court’s opinion, leaving the final rule in place. BLM’s current rulemaking is subject to public notice and comment, as well as judicial challenges.the Bureau of Land Management finalized a rule governing hydraulic fracturing on federal lands, implementation of which has been stayed pending the resolution of legal challenges. Further, legislation to amend the Safe Drinking Water Act to repeal the exemption for hydraulic fracturing (except when diesel fuels are used) from the definition of “underground injection” and require federal permitting and regulatory control of hydraulic fracturing, as well as legislative proposals to require disclosure of the chemical constituents of the fluids used in the fracturing process, have been proposed in recent sessions of Congress. Several states and local jurisdictions in which we or our customers operate also have adopted or are considering adopting regulations that could restrict or prohibit hydraulic fracturing in certain

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circumstances, impose more stringent operating standards and/or require the disclosure of the composition of hydraulic fracturing fluids.

More recently, federal and state governments have begun investigating whether the disposal of produced water into underground injection wells has caused increased seismic activity in certain areas. For example, in December 2016, the EPA released its final report regarding the potential impacts of hydraulic fracturing on drinking water resources, concluding that “water cycle” activities associated with hydraulic fracturing may impact drinking water resources under certain circumstances such as water withdrawals for fracturing in times or areas of low water availability, surface spills during the management of fracturing fluids, chemicals or produced water, injection of fracturing fluids into wells with inadequate mechanical integrity, injection of fracturing fluids directly into groundwater resources, discharge of inadequately treated fracturing wastewater to surface waters, and disposal or storage of fracturing wastewater in unlined pits. The results of these studies could lead federal and state governments and agencies to develop and implement additional regulations.

Increased regulation of hydraulic fracturing and related activities (whether as a result of the EPA study results or resulting from other factors) could subject us and our customers to additional permitting and financial assurance requirements, more stringent construction specifications, increased monitoring, reporting and recordkeeping obligations, and plugging and abandonment requirements. New requirements could result in increased operational costs for us and our customers, and reduce the demand for our services.

OSHA Matters. The Occupational Safety and Health Act (“OSHA”) and comparable state statutes regulate the protection of the health and safety of workers. In addition, the OSHA hazard communication standard requires that information be maintained about hazardous materials used or produced in operations and that this information be provided to employees, state and local government authorities and the public.

Employees

As of September 30, 2017, we employed 939 people. None of our employees are represented by labor unions or subject to collective bargaining agreements.

Legal Proceedings

From time to time we may be involved in litigation relating to claims arising out of our operations in the normal course of business. We are not currently a party to any legal proceedings that we believe would have a material adverse effect on our financial position, results of operations or cash flows and are not aware of any material legal proceedings contemplated by governmental authorities.

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MANAGEMENT

Directors and Executive Officers of ProPetro Holding Corp.

The following table sets forth the names, ages and titles of our directors and executive officers. Directors hold office until their successors have been elected or qualified or until their earlier death, resignation, removal or disqualification. Executive officers are appointed by, and serve at the discretion of, the board of directors. The following table shows information for the directors and executive officers as of November 1, 2017.

Name	Age	Position with ProPetro Holding Corp.
Dale Redman	56	Chief Executive Officer and Director
David Sledge	60	Chief Operating Officer
Jeffrey Smith	58	Chief Financial Officer
Mark Howell	39	General Counsel and Corporate Secretary
Ian Denholm	29	Chief Accounting Officer
Spencer D. Armour, III	63	Chairman of the Board of Directors
Steven Beal	58	Director
Schuyler E. Coppedge	43	Director
Stephen Herman	73	Director
Matthew H. Himler	31	Director
Peter Labbat	52	Director
Alan E. Douglas	58	Director
Christopher Leininger	48	Director
Jack B. Moore	63	Director

Dale Redman

Dale Redman is a co‑founder of ProPetro and has been Chief Executive Officer since 2008, and he has been a member of our board of directors since 2005. Mr. Redman has over 32 years of executive and entrepreneurial experience in the energy services industry. He was a co‑founder and Chief Executive Officer of Downhole Injection Systems, LLC, which was sold in 2004. Prior to that, Mr. Redman was President and CEO of Reef Chemical Company from 1993 to 1998. Mr. Redman received a B.B.A. in Finance from Texas Tech University. We believe that Mr. Redman’s industry experience and deep knowledge of our business and our customers makes him well suited to serve as Chief Executive Officer and director.

David Sledge

David Sledge has served as our Chief Operating Officer since 2011. Mr. Sledge has over 37 years of experience in the energy services industry, Mr. Sledge currently serves on the Board of Directors for Comstock Resources, Inc. where he has served since 1996. Prior to joining ProPetro Mr. Sledge was Vice President ‑ Drilling for Basic Energy Services from 2007 to 2009. Mr. Sledge was President and Chief Operating Officer of Sledge Drilling Corp., which was sold to Basic Energy Services in 2007. Mr. Sledge received a B.B.A. in Management from Baylor University. We believe Mr. Sledge’s experience in the oilfield services business, combined with his executive management experience, makes him well suited to serve as our Chief Operating Officer.

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Jeffrey Smith

Jeffrey Smith is a co‑founder of ProPetro and has been our Chief Financial Officer since 2005. Mr. Smith has over 33 years of accounting and financial experience. Prior to joining the Company, Mr. Smith served as President of Nittany Enterprises from 1991 to 2005, and before that Mr. Smith served as Chief Financial Officer for Southmark Commercial Management Inc., a national commercial real estate company. Mr. Smith is a licensed certified public accountant. Mr. Smith received a B.B.A. in Finance from Penn State University and a M.B.A. from the University of Michigan. We believe that Mr. Smith’s extensive experience in accounting and finance, and history in the energy services industry, makes him well suited to serve as our Chief Financial Officer.

Mark Howell

Mark Howell has served as ProPetro’s General Counsel and Corporate Secretary since March 2017. Prior to joining ProPetro, Mr. Howell served Anthem, Inc. as Associate General Counsel ‑ Corporate Securities and Finance from September 2015, and Vantage Drilling Company, an international oil and gas services company, in various legal roles from 2010 to 2015, including as General Counsel from 2014 and Legal Director from 2011. Prior to joining Vantage, Mr. Howell worked as an attorney focused on corporate and securities law and oil and gas transactions at Burleson Cooke LLP and Andrews Kurth LLP. Mr. Howell holds a Doctorate of Jurisprudence from South Texas College of Law and a B.A. from the University of Texas. We believe that Mr. Howell’s experience with corporate and securities law and the oil and gas industry makes him well suited to serve as General Counsel and Corporate Secretary.

Ian Denholm

Ian Denholm has served as ProPetro’s Chief Accounting Officer since August 2017. Mr. Denholm joined ProPetro as Director of Finance in 2013 through the acquisition of Academy Drilling, an oil and gas drilling services company headquartered in Odessa, Texas, where he served as Chief Financial Officer since 2011. Prior to joining Academy Drilling, Mr. Denholm served PricewaterhouseCoopers LLP where his work focused on master limited partnerships. Mr. Denholm holds both a Bachelor’s and Master’s degree in Accounting from Texas Tech University. We believe that Mr. Denholm’s experience with accounting matters unique to the oil and gas industry and oilfield services companies makes him well suited to serve as Chief Accounting Officer.

Spencer D. Armour, III

Spencer D. Armour, III has served as chairman of our board of directors since February 2013. Mr. Armour has over 30 years of executive and entrepreneurial experience in the energy services industry. Mr. Armour currently serves as President of PT Petroleum LLC in Midland, Texas. He was the Vice President of Corporate Development for Basic Energy Services, Inc. from 2007 to 2008, which acquired Sledge Drilling Corp., a company Mr. Armour co‑founded and served as Chief Executive Officer for from 2005 to 2006. From 1998 through 2005, he served as Executive Vice President of Patterson‑UTI Energy, Inc., which acquired Lone Star Mud, Inc., a company Mr. Armour founded and served as President for from 1986 to 1997. He also served on the Patterson ‑ UTI Board of Directors from 1999 through 2001. Mr. Armour received a B.S. in Economics from the University of Houston in 1977 and was appointed to the University of Houston System Board of Regents in 2011 by former Texas Governor, Rick Perry. We believe that Mr. Armour’s extensive experience in the energy services industry and his deep knowledge of the industry dynamics within the Permian Basin make him well suited to serve as a director.

Steven Beal

Steven Beal has served as a member of our board of directors since April 2017. Mr. Beal has over 30 years of experience in energy industry and accounting activities. Mr. Beal served as a consultant to Concho Resources Inc. from 2009 to 2013, and, prior to that, served as the president and chief operating officer of Concho Resources Inc. from its formation in 2004 until his retirement in 2009. Previously, Mr.

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Beal was a director and the executive vice president and chief financial officer of Concho Oil & Gas Corp. from its formation until becoming its president and chief operating officer in 2002, a position he held until 2004. Prior to Concho Oil & Gas Corp., Mr. Beal was a director and the vice president and chief financial officer of Concho Resources Inc., a predecessor company to Concho Resources Inc., from its formation in 1997 until its sale in 2001. From 1988 to 1997, Mr. Beal was employed by Parker & Parsley Petroleum company in a variety of capacities, including serving as senior vice president and chief financial officer. From 1981 to 1988, Mr. Beal was employed by the accounting firm currently known as PricewaterhouseCoopers. Mr. Beal currently serves on the board of directors of Concho Resources Inc. and First Financial Bankshares, Inc. Mr. Beal received a Bachelor of Business Administration in accounting from the University of Texas. Mr. Beal was selected to serve as a director on the board due to his extensive experience in the energy industry and his extensive accounting experience.

Schuyler E. Coppedge

Schuyler E. Coppedge has served as a member of our board of directors since March 2013. Mr. Coppedge is a Partner at Energy Capital Partners where he has worked since 2005. Mr. Coppedge has over 20 years of experience in energy industry finance and investment activities, with a particular emphasis on oil field services, midstream oil and gas and renewable power generation. Prior to joining Energy Capital in 2005, Mr. Coppedge spent over six years at JP Morgan. In addition to ProPetro, Mr. Coppedge currently serves on the boards of CIG Logistics, STEAG‑SCR Tech, Terra‑Gen, LLC and USD Partners LP and as an observer to NCSG Crane & Heavy Haul Corporation. Mr. Coppedge also served on the board of FirstLight Power Enterprises, Inc. Mr. Coppedge received a B.A. in history from Middlebury College and an M.B.A. in finance from the Wharton School at the University of Pennsylvania. Mr. Coppedge was selected to serve as a director on the board due to his affiliation with Energy Capital Partners and his extensive experience across the finance and energy sectors.

Stephen Herman

Stephen Herman has served as a member of our board of directors since March 2013. Mr. Herman has served as a Managing Director at Energy Capital Partners since 2005. Mr. Herman has over 43 years of energy industry experience, with a particular emphasis on renewable and fossil generation and environmental and oil field services. Prior to joining Energy Capital Partners in 2005, Mr. Herman was Senior Energy Counsel for Goldman Sachs. Mr. Herman was also the Senior Vice President and General Counsel of PG&E National Energy Group and its predecessor, U.S. Generating Company. Mr. Herman was also previously a Partner at Latham & Watkins LLP and Kirkland & Ellis LLP. Mr. Herman currently serves on the boards of ADA Carbon Solutions LLC, STEAG‑SCR Tech, EnergySolutions, Inc. and Granite Holdings, Inc. (the parent company of Wheelabrator Technologies, Inc.). Mr. Herman has also served on the boards of FirstLight Resources Inc., NextLight Renewable Power, LLC, PLH Group, Inc., Power Holdings of Illinois, LLC and Ice Energy, Inc. Mr. Herman received a B.S. in Economics from the Wharton School of Finance and Commerce at the University of Pennsylvania and an LL.B. from the University of Virginia Law School. Mr. Herman was selected to serve as a director on the board due to his affiliation with Energy Capital Partners, his extensive experience in the law and finance, and his history in the energy industry.

Matthew H. Himler

Matthew H. Himler has served as a member of our board of directors since October 2016 and was appointed to the board in connection with his affiliation with Energy Capital Partners. Mr. Himler is a Vice President at Energy Capital Partners, where he has worked since 2012. Mr. Himler has over seven years of experience in energy industry investment and finance activities. In addition to ProPetro, Mr. Himler serves on the board of NESCO Holdings LP and is an observer to NCSG Crane and Heavy Haul Corporation. Prior to joining Energy Capital Partners in 2012, Mr. Himler was an analyst at Lazard Freres & Co. Mr. Himler received a B.A. in Economics and Political Science from Amherst College. Mr. Himler was

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selected to serve as a director on the board due to his affiliation with Energy Capital Partners and his experience in investment activities within the oilfield and energy services sectors.

Peter Labbat

Peter Labbat has served as a member of our board of directors since March 2013 and was appointed to the board in connection with his affiliation with Energy Capital Partners. Mr. Labbat has served as a Partner of Energy Capital Partners since 2006. Mr. Labbat has over 27 years of financial and investment experience and specializes in the energy and power sectors. Prior to joining Energy Capital Partners in 2006, Mr. Labbat was a Managing Director at Goldman Sachs & Co. LLC. He currently serves on the boards of ADA Carbon Solutions, LLC, Next Wave Energy Partners, LP, Sendero Midstream Partners, LP and Summit Midstream Partners, LP. Mr. Labbat has also served on the boards of NextLight Renewable Power, LLC, Odessa Power Holdings, LLC, Ice Energy, Inc. and Red Oak Power Holdings, LLC. Mr. Labbat received a B.A. in Economics from Georgetown University and an M.B.A. from the Wharton School at the University of Pennsylvania. Mr. Labbat was selected to serve as a director on the board due to his affiliation with Energy Capital Partners and his extensive experience across the finance and energy sectors.

Alan E. Douglas

Alan E. Douglas has served as a member of our board of directors since March 2017 and was appointed to the board in connection with our IPO. Mr. Douglas is a shareholder of Johnson, Miller & Co. where he has worked for 25 years. Mr. Douglas is a Certified Public Accountant with over 37 years of experience in accounting and audit activities. Prior to joining Johnson, Miller & Co., Mr. Douglas was a Certified Public Accountant at KPMG for twelve years. Mr. Douglas received a B.B.A. in accounting from Texas Tech University. Mr. Douglas was selected to serve as a director on the board due to his extensive experience with accounting and auditing activities.

Christopher M. Leininger

Christopher M. Leininger has served as a member of our board of directors since March 2017 and was appointed to the board in connection with our IPO. Mr. Leininger is Managing Director and Deputy General Counsel at Energy Capital Partners where he has worked since 2006. Mr. Leininger has over 17 years of experience in legal and finance activities in the energy industry. Mr. Leininger currently serves on the boards of Wheelabrator Technologies, Inc., NESCO Holdings, LP, EnergySolutions, Inc. and PLH Group, Inc. Prior to joining Energy Capital Partners, Mr. Leininger was an associate at Latham & Watkins LLP for 7 years. Mr. Leininger received a B.A. in History and Political Science from the University of San Diego and a J.D. from the University of Virginia School of Law. Mr. Leininger was selected to serve as a director on the board due to his affiliation with Energy Capital Partners and his experience in financing, acquisition and development transactions.

Jack B. Moore

Jack B. Moore has served as a member of our board of directors since March 2017 and was appointed to the board in connection with our IPO. Mr. Moore served as Chairman of the Board of Cameron International Corporation from 2011 until it was acquired in April 2016. Mr. Moore worked at Cameron International Corporation from 1999 until 2014, serving as Chief Executive Officer from 2008 to 2015 and as President from 2008 to 2014. Prior to that, he held various management positions at Baker Hughes Incorporated, where he was employed for 23 years. Mr. Moore currently serves on the board of directors of Occidental Petroleum Corporation, Rowan Companies plc and KBR Inc. Mr. Moore also previously served on the board of directors of the American Petroleum Institute, the National Ocean Industries Association, and the Petroleum Equipment Suppliers Association. Mr. Moore received a B.B.A. from the University of Houston and is a graduate of the Advanced Management Program at Harvard Business School. Mr. Moore was selected to serve as a director on the board due to his wealth of

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experience in the oilfield service sector, including service as a director and executive officer to public corporations in the sector.

Board of Directors and Committees

Our board of directors consists of ten directors, five of which were designated by Energy Capital Partners. See “Certain Relationships and Related Party Transactions ‑ Stockholders Agreement.” Our bylaws provide that the terms of office of the directors are one year from the time of their election until the next annual meeting of shareholders or until their successors are duly elected and qualified.

Our certificate of incorporation provides that the authorized number of directors will, subject to the provisions of the stockholders agreement, be fixed from time to time by the board of directors pursuant to a resolution adopted by a majority of the whole board. In addition, our certificate of incorporation and our bylaws provide that, in general, vacancies on the board may be filled by a majority of directors in office, although less than a quorum.

Each of our committees has a charter, which along with our Code of Business Conduct and Ethics and Corporate Governance Guidelines, are available on our website at www.propetroservices.com and stockholders may obtain printed copies, free of charge by sending a written request to ProPetro Holding Corp. at 1706 S. Midkiff, Bldg. B, Midland, Texas 79701; Attn: General Counsel. Information contained on or available through our website is not part of or incorporated by reference into this prospectus or any other report we may file with the SEC.

Audit Committee

Our board of directors has established an audit committee whose functions include the following:

• assist the board of directors in its oversight responsibilities regarding the integrity of our financial statements, our compliance with legal and regulatory requirements, the independent accountant’s qualifications and independence and our accounting and financial reporting processes of and the audits of our financial statements;

• prepare the report required by the SEC for inclusion in our annual proxy or information statement;

• approve audit and non‑audit services to be performed by the independent accountants;

• perform such other functions as the board of directors may from time to time assign to the audit committee.

The specific functions and responsibilities of the audit committee are set forth in the audit committee charter. Our audit committee is comprised of Steven Beal, Alan E. Douglas and Jack B. Moore, each of whom is independent and satisfies the financial literacy standards for audit committee members under the Exchange Act and NYSE listing standards. Each of Steven Beal and Jack B. Moore qualifies as an “audit committee financial expert” under applicable SEC rules.

Pursuant to our bylaws, our board of directors may, from time to time, establish other committees to facilitate the management of our business and operations.

Compensation Committee

We have a standing compensation committee comprised of Spencer D. Armour, III, Jack B. Moore and Alan E. Douglas. This committee establishes salaries, incentives and other forms of compensation for officers and directors. The compensation committee also administers our long‑term incentive plan.

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Nominating and Corporate Governance Committee

Our nominating and corporate governance committee is comprised of Schuyler E. Coppedge, Alan E. Douglas and Jack B. Moore, of whom Messrs. Moore and Douglas satisfy the independence requirements of the Exchange Act and NYSE listing standards. The nominating and corporate governance committee is responsible for making recommendations to the board of directors regarding candidates for directorships and the size and composition of the board. In addition, the nominating and corporate governance committee is responsible for overseeing our corporate governance guidelines and reporting and making recommendations to the board concerning corporate governance matters.

Compensation Committee Interlocks and Insider Participation

None of our executive officers serve on the board of directors or compensation committee of a company that has an executive officer that serves on our board or compensation committee. No member of our board is an executive officer of a company in which one of our executive officers serves as a member of the board of directors or compensation committee of that company.

Board Role in Risk Oversight

Our corporate governance guidelines provide that the board of directors is responsible for reviewing the process for assessing the major risks facing us and the options for their mitigation. This responsibility is largely satisfied by our audit committee, which is responsible for reviewing and discussing with management and our independent registered public accounting firm our major risk exposures and the policies management has implemented to monitor such exposures, including our financial risk exposures and risk management policies.

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EXECUTIVE COMPENSATION

This section discusses the material components of the executive compensation program for our executive officers who are named in the “2016 Summary Compensation Table” below. In 2016, our “named executive officers” and their positions were as follows:

• Dale Redman, Chief Executive Officer;

• Jeffrey Smith, Chief Financial Officer; and

• David Sledge, Chief Operating Officer.

This discussion may contain forward‑looking statements that are based on our current plans, considerations, expectations and determinations regarding future compensation programs.

2016 Summary Compensation Table

The following table sets forth information concerning the compensation of our named executive officers for the fiscal years ended December 31, 2015 and 2016.

Name and Principal Position	Year	Salary ($)	Bonus ($)	Option Awards ($)	All Other Compensation ($)(2)	Total ($)
Dale Redman	2016	250,000	750,000	885,478(1)	10,800	1,896,278
Chief Executive Officer	2015	250,000	—	—	10,800	260,800
Jeffrey Smith	2016	250,000	500,000	549,028(1)	10,800	1,309,828
Chief Financial Officer	2015	250,000	—	—	10,800	260,800
David Sledge	2016	250,000	500,000	407,869(1)	10,800	1,168,669
Chief Operating Officer	2015	250,000	—	—	10,800	260,800

____________________

(1) All option awards granted to any named executive officer have been valued based on the fair value of the option awards at the grant dates computed in accordance with FASB ASC 718, and do not represent amounts realized by the named executive officers. We provide information regarding the assumptions used to calculate the value of all option awards granted in 2016 in Note 14 to our audited consolidated financial statements included elsewhere in this prospectus.

(2) This column shows the amounts that Messrs. Redman, Smith and Sledge each received in 2015 and 2016 pursuant to our Vehicle Allowance Program.

Narrative to Summary Compensation Table

2016 Salaries

The named executive officers receive a base salary to compensate them for services rendered to our company. The base salary payable to each named executive officer is intended to provide a fixed component of compensation reflecting the executive’s skill set, experience, role and responsibilities. Each named executive officer’s initial base salary was provided in his employment agreement. There were no changes in the base salaries of any of the named executive officers in 2016.

On June 1, 2017, our board of directors approved increases in the annual base salaries payable to each of Messrs. Redman, Smith and Sledge to $650,000, $500,000, and $425,000, respectively. Under the terms of their respective employment agreements, each of Messrs. Redman, Smith and Sledge was previously provided with an annual salary of $250,000. These salary increases, which were effective June 1, 2017, are designed to provide annual base salaries that are more directly comparable to other similarly sized public companies in the oilfield services industry.

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2016 Bonuses

Each of the named executive officers received a discretionary bonus payment in 2016, determined by our board of directors. In determining bonus amounts, our board of directors considered our performance during the fiscal year, including the private placement round that was closed prior to the end of 2016, as well as the fact that no bonuses were paid with respect to fiscal year 2015. In addition, in connection with our IPO, we awarded discretionary cash bonuses to each of Messrs. Redman, Smith and Sledge in the amounts of $125,000, $75,000 and $435,000, respectively.

Equity Compensation

We maintain an equity incentive plan, the 2013 Stock Option Plan, which has provided 28 of our employees, including the named executive officers, the opportunity to participate in the equity appreciation of our business through the receipt of options to purchase shares of our common stock. We believe that such stock options function as a compelling retention tool.

On June 14, 2013, we granted stock options to purchase 699,852 shares of our common stock to each of our named executive officers. Each such stock option has a $3.96 per share exercise price. Such stock options vested in equal annual installments over four years from the date of the grant. In connection with our IPO, Mr. Sledge cashlessly exercised a portion of the then-vested portion of his 2013 option, resulting in his receipt of 81,106 shares of our common stock.

In addition, we granted Mr. Redman 372,335 restricted stock units on September 30, 2013 pursuant to a stand‑alone restricted stock unit agreement, which restricted stock units are not subject to the 2013 Stock Option Plan or any equity plan. Each restricted stock unit represents the right to receive one share of common stock of the Company. Pursuant to their original terms, the restricted stock units would only be settled upon a change of control of the Company (which did not occur in connection with our IPO), whether or not Mr. Redman was an employee, consultant or director on such date. In connection with our IPO, we terminated and will liquidate, in accordance with Section 409A of the Code, (i) Mr. Redman’s restricted stock units and (ii) stock options granted to various employees other than the named executive officers on December 1, 2013 (but not the stock options granted to our named executive officers in June 2013 as described above). We will provide Mr. Redman with 372,335 shares of our common stock subject to his restricted stock units, which will vest on the first anniversary of our IPO. Additionally, we will pay each employee who received an option on December 1, 2013, in exchange for his or her terminated stock option, a cash amount equal to (a) the excess, if any, of the (1) IPO price per share of our common stock, $14.00, over (2) $3.96 (the per share exercise price of such option) multiplied by (b) the number of shares of common stock subject to such option, with 50% of such payment payable on the first anniversary of our IPO and the remaining 50% of such payment payable on the second anniversary of our IPO, subject to such employee’s continued employment with us through each applicable payment date. Any such employee whose employment is terminated by us without cause (as determined by our board of directors) prior to the second anniversary of our IPO will remain entitled to his or her option cancellation payments on the applicable anniversaries.

We did not grant any additional stock options in 2014 or 2015, but on July 19, 2016, we granted additional stock options to our named executive officers pursuant to the 2013 Stock Option Plan. These 2016 options were primarily granted in order to prevent the equity ownership of the named executive officers from being diluted as a result of Energy Capital Partners’ equity contribution to the Company on June 8, 2016. The options were also granted to reward the named executive officers’ past contributions to the Company and expected future contributions. This 2016 grant included options to purchase 501,540 shares of our common stock granted to Mr. Redman, options to purchase 310,971 shares of our common stock granted to Mr. Smith and options to purchase 231,019 shares of our common stock granted to Mr. Sledge. All of these 2016 options have a $2.25 per share exercise price. Pursuant to their original terms, such stock options were scheduled to vest in five equal semi‑annual installments starting on December 31, 2016. In connection with our IPO, however, we fully accelerated the vesting of the unvested portion of Messrs. Redman, Smith and Sledge’s 2016 options.

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In connection with our IPO, we adopted the 2017 Incentive Award Plan in order to facilitate the grant of cash and equity incentives to directors, employees (including our named executive officers) and consultants of our company and certain of its affiliates and to enable our company and certain of its affiliates to obtain and retain services of these individuals, which is essential to our long‑term success. For additional information about the 2017 Incentive Award Plan, please see the section titled “Equity Incentive Plans” below.

IPO Grants to Employees under the 2017 Incentive Award Plan

In connection with our IPO, we granted to certain of our employees awards of stock options under the 2017 Incentive Award Plan at an exercise price equal to the IPO price of our common stock, or $14.00, with respect to an aggregate of 793,738 shares of common stock. The following table shows the numbers of stock options granted to the named executive officers. The stock options will vest in equal installments upon the first four anniversaries of the date of grant, subject to the named executive officer’s continued employment, and will expire upon the tenth anniversary of the date of grant.

Name	Number of Stock Options
Dale Redman	119,988
Jeffrey Smith	119,988
David Sledge	119,988

2017 Grants

On June 5, 2017, our board of directors authorized and granted 72,569, 27,214 and 27,214 performance stock unit awards to each of Messrs. Redman, Smith and Sledge. The actual number of shares that may be issued under the performance stock unit awards ranges from zero up to a maximum of twice the target number of performance stock unit awards granted, based on our total shareholder return relative to a designated peer group from the date of our IPO through December 31, 2019.

Retirement Plans

We currently maintain a 401(k) retirement savings plan for our employees who satisfy certain eligibility requirements. Our named executive officers are eligible to participate in the 401(k) plan on the same terms as other full‑time employees, but currently do not participate in the 401(k) plan. The Internal Revenue Code, or the Code, allows eligible employees to defer a portion of their compensation, within prescribed limits, on a pre‑tax basis through contributions to the 401(k) plan. Currently, we match contributions made by participants in the 401(k) plan up to a specified percentage of the employee contributions and we may make certain discretionary profit sharing contributions. Both the matching contributions and the profit sharing contributions vest in equal installments over five years of service, with full vesting on retirement, death or disability. We believe that offering a vehicle for tax‑deferred retirement savings though our 401(k) plan, and making matching contributions and profit sharing contributions that vest over time, add to the overall desirability of our executive compensation package and further incentivize our employees in accordance with our compensation policies. We do not maintain any defined benefit pension plans or deferred compensation plans.

Employee Benefits and Perquisites

Health/Welfare Plans. All of our full‑time employees, including our named executive officers, are eligible to participate in our health and welfare plans, including:

• medical, dental and vision benefits;

• medical and dependent care flexible spending accounts;

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• short‑term and long‑term disability insurance; and

• life insurance.

Vehicle Allowance Program. In addition, our named executive officers each participate in a vehicle allowance program.

We believe the benefits and perquisites described above are necessary and appropriate to provide a competitive compensation package to our named executive officers.

No Tax Gross‑Ups

We do not make gross‑up payments to cover our named executive officers’ personal income taxes that may pertain to any of the compensation or perquisites paid or provided by our company.

Employment Agreements

The Company entered into employment agreements with Messrs. Redman, Smith and Sledge, each dated April 17, 2013, providing for their respective positions as Chief Executive Officer, Chief Financial Officer and Chief Operating Officer, and initial annual base salaries of $250,000 for each such executive officer. The employment agreements provide for an initial two‑year term and automatically renew for successive one‑year terms unless either party gives notice of non‑extension to the other no later than 90 days prior to the expiration of the then‑applicable term.

The employment agreements provide that each executive will be eligible to receive an annual cash bonus in an amount up to 50% of the executive’s annual base salary, based upon individual and Company annual performance targets established by the Board in its sole discretion. The employment agreements also provided for the executives’ initial stock option grants.

Pursuant to the employment agreements, upon termination of employment by the Company without Cause or by the executive for Good Reason, each executive will receive the sum of his then current annual base salary and his annual bonus for the immediately preceding calendar year, payable in installments over the year following termination, as well as subsidized COBRA premiums for such period. Each executive will be required to execute a release of claims in favor of the Company in order to receive his severance benefits.

“Cause” is defined in the employment agreements as (i) the executive’s willful failure to substantially perform his duties, (ii) the executive’s willful failure to carry out, or comply with, in any material respect any lawful directive of our board of directors, (iii) the executive’s commission at any time of any act or omission that results in, or may reasonably be expected to result in, a conviction, a plea of no contest, plea of nolo contendere or imposition of unadjudicated probation for any felony or crime involving moral turpitude; (iv) the executive’s unlawful use (including being under the influence) or possession of illegal drugs on the Company’s premises or while performing the executive’s duties and responsibilities; (v) the executive’s commission at any time of any act of fraud, embezzlement, misappropriation, misconduct, conversion of assets of the Company or breach of fiduciary duty against the Company or (vi) the executive’s material breach of the employment agreement or any other agreement with the Company, subject to certain procedural requirements.

“Good Reason” is defined in the employment agreements as (i) a material diminution in the executive’s authority, duties or responsibilities, (ii) a material diminution in base compensation or (iii) any other action or inaction that constitutes a material breach of the employment agreement by the Company, in each case subject to certain procedural requirements.

The agreements contain noncompetition covenants that apply through one year following termination of employment and nonsolicitation covenants that apply through three years following termination of employment.

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Outstanding Equity Awards at Fiscal Year‑End

The following table summarizes the number of shares of common stock underlying outstanding equity incentive plan awards for each named executive officer as of December 31, 2016.

	Option Awards					Stock Awards
Name	Number of Securities Underlying Unexercised Options Exercisable	Number of Securities Underlying Unexercised Options Unexercisable	Option Exercise Price ($)		Option Expiration Date	Number of Shares or Units of Stock That Have Not Vested	Market Value of Shares or Units of Stock That Have Not Vested ($)(4)
Dale Redman	524,889(1)	174,963	$	3.96	6/14/2023	—	—
	—	—	—		—	372,335(3)	3,723,354
	100,308(2)	401,232	$	2.25	7/19/2026	—	—
Jeffrey Smith	524,889(1)	174,963	$	3.96	6/14/2023	—	—
	62,194(2)	248,777	$	2.25	7/19/2026	—	—
David Sledge	524,889(1)	174,963	$	3.96	6/14/2023	—	—
	46,204(2)	184,815	$	2.25	7/19/2026	—	—

____________________

(1) On June 14, 2013, Messrs. Redman, Smith and Sledge were each granted 699,852 options to purchase our common stock that vested in equal annual installments on June 14, 2014, June 14, 2015, June 14, 2016 and June 14, 2017.

(2) On July 19, 2016, Mr. Redman was granted 501,540 options to purchase our common stock, Mr. Smith was granted 310,971 options to purchase our common stock, and Mr. Sledge was granted 231,019 options to purchase our common stock. These grants were originally scheduled to vest in equal installments on December 31, 2016, June 30, 2017, December 31, 2017, June 30, 2018, and December 30, 2018. However, as described under “Narrative to Summary Compensation Table—Equity Compensation,” we fully accelerated the vesting of the unvested portion of these grants in connection with our IPO.

(3) On September 30, 2013, Mr. Redman was granted 372,335 restricted stock units that were originally intended to be settled only upon a change of control of the Company. However, as described under “Narrative to Summary Compensation Table—Equity Compensation,” in connection with our initial public offering, we terminated Mr. Redman’s restricted stock units and will provide Mr. Redman with the underlying shares on the first anniversary of our IPO.

(4) The amount reported above under the heading “Market Value of Shares or Units of Stock That Have Not Vested” reflects the fair market value of shares of our common stock as of December 31, 2016.

Director Compensation Table

Only one of our directors, Spencer D. Armour, III, received compensation for his director service for the fiscal year ended December 31, 2016.

Name	Fees Earned or Paid in Cash ($)	Option Awards ($)(1)	Total ($)
Spencer D. Armour, III	220,000	407,869(2)	627,869

____________________

(1) All option awards granted to our non‑employee director have been valued based on the fair value of the option awards at the grant dates computed in accordance with FASB ASC 718, and do not represent amounts realized by the non‑employee director. We provide information regarding the assumptions used to calculate the value of all option awards granted in 2016 in Note 14 to our audited consolidated financial statements included elsewhere in this prospectus.

(2) On July 19, 2016, Mr. Armour was granted 231,019 options to purchase our common stock with an exercise price of $2.25 per share. This grant was originally scheduled to vest in equal installments on December 31, 2016, June 30, 2017, December 31, 2017, June 30, 2018, and December 30, 2018. However, we fully accelerated the vesting of the unvested portion of this grant in connection with our IPO. The table below shows the aggregate numbers of option awards (exercisable and unexercisable) held as of December 31, 2016 by Mr. Armour. Mr. Armour did not hold any stock awards as of such date and no other directors held any equity awards as of such date.

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Name	Grant Date	Number of Securities Underlying Options	Number of Securities Underlying Unexercised Options Exercisable	Number of Securities Underlying Unexercised Options Unexercisable
Spencer D. Armour, III	6/14/2013	699,852	524,889	174,963
	7/19/2016	231,019	46,204	184,815
Total		930,871	571,093	359,778

Narrative to Director Compensation Table

2016 Fees Earned

Mr. Armour was paid $120,000 in director fees in 2016 to compensate him for his attendance at and contributions to our quarterly board meetings, as well as for counseling us and Energy Capital Partners on various strategic matters with respect to the Company during the year, including capital raising and capital expenditure decisions. Additionally, Mr. Armour earned a $100,000 bonus for the year 2016. Similar to the bonuses of the named executive officers, Mr. Armour’s bonus was discretionary and determined by our board of directors. In determining bonus amounts, our board of directors considered our performance during the fiscal year, including the private placement round that was closed prior to the end of 2016, as well as the fact that no bonuses were paid with respect to fiscal year 2015. Considering both his director fees and his 2016 bonus, Mr. Armour earned a total of $220,000 for his services as a non‑employee director for the Company. In addition, following our IPO, we awarded a discretionary cash bonus to Mr. Armour in the amount of $435,000.

Equity Compensation

Pursuant to the 2013 Stock Option Plan, on June 14, 2013, we granted stock options to purchase 699,852 shares of our common stock to Mr. Armour in his role as a director of the Company. These 2013 options have a $3.96 per share exercise price. Such stock options vested in equal annual installments over four years from the date of the grant. In connection with our IPO, Mr. Armour cashlessly exercised a portion of the then-vested portion of his 2013 option, resulting in his receipt of 81,106 shares of our common stock.

On July 19, 2016, we granted additional stock options to Mr. Armour in his role as a director of the Company pursuant to the 2013 Stock Option Plan. Like the options granted on such date to our named executive officers, these 2016 options were primarily granted in order to prevent Mr. Armour’s equity ownership from being diluted as a result of Energy Capital Partners’ equity contribution to the Company on June 8, 2016. Pursuant to this 2016 grant, Mr. Armour received options to purchase 231,019 shares of our common stock. These 2016 options have a $2.25 per share exercise price. Pursuant to their original terms, such stock options were scheduled to vest in equal five equal semi‑annual installments starting on December 31, 2016. In connection with our IPO, however, we fully accelerated the vesting of the unvested portion of Mr. Armour’s 2016 options.

On June 5, 2017, in accordance with our non-employee director compensation policy, we granted 7,558 restricted stock units to Mr. Armour. Such restricted stock units will vest in full upon the earlier to occur of the day immediately preceding our next annual meeting of shareholders and June 5, 2018.

Non‑Employee Director Compensation Policy

In connection with our IPO, we adopted a non‑employee director compensation policy that is applicable to each of our non‑employee directors who is not employed by an affiliate of Energy Capital Partners. Pursuant to this policy, each eligible non‑employee director who is not employed by an affiliate of Energy Capital Partners will receive an annual cash retainer of $55,000. The chairperson of the Board will

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receive an additional annual cash retainer of $15,000. Further, the chairperson of the audit committee will receive an additional annual cash retainer of $15,000, the chairperson of the compensation committee will receive an additional annual cash retainer of $10,000 and the chairperson of the nominating and governance committee will receive an additional $10,000. Each annual retainer will be paid quarterly in arrears.

Also, pursuant to the non‑employee director compensation policy, on the date of any annual meeting of our shareholders, we intend to grant each eligible non‑employee director who is not employed by an affiliate of Energy Capital Partners an award of restricted stock units that have a grant date fair value of $100,000. The terms of each such award will be set forth in a written award agreement between each director and us, which will generally provide for vesting after one year of continued service as a director. Any eligible non‑employee director who is not employed by an affiliate of Energy Capital Partners and who is elected or appointed mid‑year will receive a pro‑rated portion of the annual award adjusted to reflect his or her period of service.

All cash and equity awards granted under the non‑employee director compensation policy will be granted under, and subject to the limits of, the Plan.

Non‑Employee Director Stock Ownership Policy

In connection with our IPO, we adopted a non‑employee director stock ownership policy that is applicable to all of our eligible non‑employee directors who are not employed by affiliates of Energy Capital Partners. Pursuant to this policy, each eligible non‑employee director who is not employed by an affiliate of Energy Capital Partners is encouraged to hold, on and following the later of the fifth anniversary of (i) the closing and (ii) the non‑employee director’s election or appointment to the Board, shares of our common stock (valued based on the closing price of our common stock) with a value equal to or in excess of 300% of the non‑employee director’s annual cash retainer, as such threshold may be amended by our nominating and corporate governance committee from time to time.

Equity Incentive Plans

2013 Stock Option Plan

We maintain the 2013 Stock Option Plan, as described above. As of the closing of our IPO, no further grants will be made under the 2013 Stock Option Plan.

2017 Incentive Award Plan

In connection with our IPO, we adopted the 2017 Incentive Award Plan, or the Plan, under which we may grant cash and equity incentive awards to eligible employees, consultants and directors in order to attract, motivate and retain the talent for which we compete. The material terms of the Plan are summarized below.

Eligibility and Administration. Our employees, consultants and directors, and employees, consultants and directors of our subsidiaries are eligible to receive awards under the Plan. The Plan is administered by our board of directors with respect to awards to non‑employee directors and by our compensation committee with respect to other participants, each of which may delegate its duties and responsibilities to committees of our directors and/or officers (referred to collectively as the plan administrator below), subject to certain limitations that may be imposed under Section 162(m) of the Code, Section 16 of the Exchange Act and/or stock exchange rules, as applicable. The plan administrator has the authority to make all determinations and interpretations under, prescribe all forms for use with, and adopt rules for the administration of, the Plan, subject to its express terms and conditions. The plan administrator sets the terms and conditions of all awards under the Plan, including any vesting and vesting acceleration conditions.

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Limitation on Awards and Shares Available. An aggregate of 5,800,000 shares of our common stock are available for issuance under awards granted pursuant to the Plan, which shares may be authorized but unissued shares, or shares purchased in the open market. If an award under the Plan is forfeited, expires, is converted to shares of another entity in connection with a spin‑off or other similar event or is settled for cash, any shares subject to such award may, to the extent of such forfeiture, expiration, conversion or cash settlement, be used again for new grants under the Plan. However, the following shares may not be used again for grant under the Plan: (1) shares tendered or withheld to satisfy grant or exercise price or tax withholding obligations associated with an award; (2) shares subject to a stock appreciation right, or SAR, that are not issued in connection with the stock settlement of the SAR on its exercise; and (3) shares purchased on the open market with the cash proceeds from the exercise of options.

Awards granted under the Plan upon the assumption of, or in substitution for, awards authorized or outstanding under a qualifying equity plan maintained by an entity with which we enter into a merger or similar corporate transaction will not reduce the shares available for grant under the Plan. The maximum number of shares of our common stock that may be subject to one or more awards granted to any participant pursuant to the Plan during any calendar year is 725,000 and the maximum amount that may be paid under a cash award pursuant to the Plan to any one participant during any calendar year period is $5,000,000; provided that these limitations will not apply until Section 162(m) applies to certain awards under the Plan (as described below). Further, the sum of the grant date fair value of equity‑based awards and the amount of any cash compensation granted to a non‑employee director during any calendar year is $400,000.

Awards. The Plan provides for the grant of stock options, including incentive stock options, or ISOs, and nonqualified stock options, or NSOs, stock appreciation rights, or SARS, restricted stock, restricted stock units, or RSUs, other stock or cash based awards and dividend equivalents. Certain awards under the Plan may constitute or provide for a deferral of compensation, subject to Section 409A of the Code, which may impose additional requirements on the terms and conditions of such awards. All awards under the Plan will be set forth in award agreements, which will detail all terms and conditions of the awards, including any applicable vesting and payment terms and post‑termination exercise limitations. Awards other than cash awards generally will be settled in shares of our common stock, but the plan administrator may provide for cash settlement of any award. A brief description of each award type follows.

• Stock Options. Stock options provide for the purchase of shares of our common stock in the future at an exercise price set on the grant date. ISOs, by contrast to NSOs, may provide tax deferral beyond exercise and favorable capital gains tax treatment to their holders if certain holding period and other requirements of the Code are satisfied. The exercise price of a stock option may not be less than 100% of the fair market value of the underlying share on the date of grant (or 110% in the case of ISOs granted to certain significant shareholders), except with respect to certain substitute options granted in connection with a corporate transaction. The term of a stock option may not be longer than ten years (or five years in the case of ISOs granted to certain significant shareholders). Vesting conditions determined by the plan administrator may apply to stock options and may include continued service, performance and/or other conditions.

• SARs. SARs entitle their holder, upon exercise, to receive from us an amount equal to the appreciation of the shares subject to the award between the grant date and the exercise date. The exercise price of a SAR may not be less than 100% of the fair market value of the underlying share on the date of grant (except with respect to certain substitute SARs granted in connection with a corporate transaction) and the term of a SAR may not be longer than ten years. Vesting conditions determined by the plan administrator may apply to SARs and may include continued service, performance and/or other conditions.

• Restricted Stock and RSUs. Restricted stock is an award of nontransferable shares of our common stock that remain forfeitable unless and until specified conditions are met, and which may be subject to a purchase price. RSUs are contractual promises to deliver shares of our

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common stock in the future, which may also remain forfeitable unless and until specified conditions are met. Delivery of the shares underlying RSUs may be deferred under the terms of the award or at the election of the participant, if the plan administrator permits such a deferral. Conditions applicable to restricted stock and RSUs may be based on continuing service, the attainment of performance goals and/or such other conditions as the plan administrator may determine.

• Other Stock or Cash Based Awards. Other stock or cash awards are cash payments, cash bonus awards, stock payments, stock bonus awards or incentive awards paid in cash, shares of our common stock or a combination of both, and may include deferred stock, deferred stock units, retainers, committee fees and meeting based fees.

• Dividend Equivalents. Dividend equivalents represent the right to receive the equivalent value of dividends paid on shares of our common stock and may be granted alone or in tandem with awards other than stock options or SARs. Dividend equivalents are credited as of dividend record dates during the period between the date an award is granted and the date such award vests, is exercised, is distributed or expires, as determined by the plan administrator. Dividend equivalents may not be paid on awards granted under the Plan unless and until such awards have vested.

The plan administrator will determine whether any awards are intended to constitute “qualified performance‑based compensation,” or QPBC, within the meaning of Section 162(m) of the Code, in which case (unless the award is a stock option or SAR) the applicable performance criteria will be selected from the list below in accordance with the requirements of Section 162(m) of the Code.

Section 162(m) of the Code imposes a $1 million cap on the compensation deduction that a public company may take in respect of compensation paid to its “covered employees” (which, for emerging growth companies and smaller reporting companies, consists of the Chief Executive Officer and the next two most highly compensated employees, and for all other public companies, includes the Chief Executive Officer and the next three most highly compensated employees other than the Chief Financial Officer), but excludes from the calculation of amounts subject to this limitation any amounts that constitute QPBC. Under current tax law, we do not expect Section 162(m) of the Code to apply to certain awards under the Plan until the earliest to occur of (1) our annual shareholders’ meeting at which members of our Board are to be elected in 2021; (2) a material modification of the Plan; (3) an exhaustion of the share supply under the Plan; or (4) the expiration of the Plan. However, QPBC performance criteria may be used with respect to awards that are not intended to constitute QPBC. In addition, the Company may issue awards that are not intended to constitute QPBC even if such awards might be non‑deductible as a result of Section 162(m) of the Code.

In order to constitute QPBC under Section 162(m) of the Code, in addition to certain other requirements, the relevant amounts must be payable only upon the attainment of pre‑established, objective performance goals set by our compensation committee and linked to shareholder‑approved performance criteria. For purposes of the Plan, one or more of the following performance criteria will be used in setting performance goals applicable to QPBC, and may be used in setting performance goals applicable to other awards: (i) adjusted net earnings or losses (either before or after one or more of the following: (A) interest, (B) taxes, (C) depreciation, (D) amortization and (E) non‑cash equity‑based compensation expense); (ii) gross or net sales or revenue or sales or revenue growth; (iii) net income (either before or after taxes); (iv) adjusted net income; (v) operating earnings or profit (either before or after taxes); (vi) cash flow (including, but not limited to, operating cash flow and free cash flow); (vii) return on assets; (viii) return on capital (or invested capital) and cost of capital; (ix) return on shareholders’ equity; (x) total shareholder return; (xi) return on sales; (xii) gross or net profit or operating margin; (xiii) costs, reductions in costs and cost control measures; (xiv) expenses; (xv) working capital; (xvi) earnings or loss per share; (xvii) adjusted earnings or loss per share; (xviii) price per share or dividends per share (or appreciation in and/or maintenance of such price or dividends); (xix) regulatory achievements or compliance (including, without limitation, regulatory body approval for commercialization of a product); (xx) implementation or completion of critical projects; (xxi) market share; (xxii) economic value; (xxiii)

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productivity; (xxiv) operating efficiency; (xxv) economic value‑added; (xxvi) cash flow return on capital; (xxvii) return on net assets; (xxviii) funds from operations; (xxix) funds available for distributions; (xxx) market penetration and geographic business expansion; (xxxi) customer satisfaction/growth; (xxxii) recruitment and retention of personnel; (xxxiii) human resources management; (xxxiv) supervision of litigation and other legal matters; (xxxv) strategic partnerships and transactions; (xxxvi) financial ratios (including those measuring liquidity, activity, profitability or leverage); (xxxvii) financing and other capital raising transactions; (xxxviii) year‑end cash; (xxxix) acquisition activity and marketing initiatives; and (xl) safety metrics, any of which may be measured either in absolute terms or as compared to any incremental increase or decrease or as compared to results of a peer group or to market performance indicators or indices.

The Plan also permits the plan administrator, in its sole discretion, to provide for objectively determinable adjustments to the applicable performance criteria in setting performance goals for QPBC awards. Such adjustments may include, but are not limited to, one or more of the following: (i) items related to a change in Applicable Accounting Standards; (ii) items relating to financing activities; (iii) expenses for restructuring or productivity initiatives; (iv) other non‑operating items; (v) items related to acquisitions; (vi) items attributable to the business operations of any entity acquired by the Company during the Performance Period; (vii) items related to the sale or disposition of a business or segment of a business; (viii) items related to discontinued operations that do not qualify as a segment of a business under Applicable Accounting Standards; (ix) items attributable to any stock dividend, stock split, combination or exchange of stock occurring during the Performance Period; (x) any other items of significant income or expense which are determined to be appropriate adjustments; (xi) items relating to unusual or infrequent corporate transactions, events or developments, (xii) items related to amortization of acquired intangible assets; (xiii) items that are outside the scope of the Company’s core, on‑going business activities; (xiv) items related to acquired in‑process research and development; (xv) items relating to changes in tax laws; (xvi) items relating to major licensing or partnership arrangements; (xvii) items relating to asset impairment charges; (xviii) items relating to gains or losses for litigation, arbitration and contractual settlements; (xix) items attributable to expenses incurred in connection with a reduction in force or early retirement initiative; (xx) items relating to foreign exchange or currency transactions and/or fluctuations; or (xxi) items relating to any other unusual or nonrecurring events or changes in Applicable Law, Applicable Accounting Standards or business conditions. For all Awards intended to qualify as Performance‑Based Compensation, such determinations shall be made within the time prescribed by, and otherwise in compliance with, Section 162(m) of the Code.

Certain Transactions. The plan administrator has broad discretion to take action under the Plan, as well as make adjustments to the terms and conditions of existing and future awards, to prevent the dilution or enlargement of intended benefits and facilitate necessary or desirable changes in the event of certain transactions and events affecting our common stock, such as stock dividends, stock splits, mergers, acquisitions, consolidations and other corporate transactions. In addition, in the event of certain non‑reciprocal transactions with our shareholders known as “equity restructurings,” the plan administrator will make equitable adjustments to the Plan and outstanding awards. In the event of a change in control of our company (as defined in the Plan), to the extent that the surviving entity declines to continue, convert, assume or replace outstanding awards, all such awards will become fully vested and exercisable in connection with the transaction. Upon or in anticipation of a change of control, the plan administrator may cause any outstanding awards to terminate at a specified time in the future and give the participant the right to exercise such awards during a period of time determined by the plan administrator in its sole discretion. Individual award agreements may provide for additional accelerated vesting and payment provisions.

Foreign Participants, Claw‑Back Provisions, Transferability, and Participant Payments. The plan administrator may modify award terms, establish subplans and/or adjust other terms and conditions of awards, subject to the share limits described above, in order to facilitate grants of awards subject to the laws and/or stock exchange rules of countries outside of the United States. All awards will be subject to the provisions of any claw‑back policy implemented by our company to the extent set forth in such

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claw‑back policy and/or in the applicable award agreement. With limited exceptions for estate planning, domestic relations orders, certain beneficiary designations and the laws of descent and distribution, awards under the Plan are generally non‑transferable prior to vesting, and are exercisable only by the participant. With regard to tax withholding, exercise price and purchase price obligations arising in connection with awards under the Plan, the plan administrator may, in its discretion, accept cash or check, shares of our common stock that meet specified conditions, a “market sell order” or such other consideration as it deems suitable.

Plan Amendment and Termination. Our Board may amend or terminate the Plan at any time; however, except in connection with certain changes in our capital structure, shareholder approval will be required for any amendment that increases the number of shares available under the Plan, “reprices” any stock option or SAR, or cancels any stock option or SAR in exchange for cash or another award when the option or SAR price per share exceeds the fair market value of the underlying shares. No award may be granted pursuant to the Plan after the tenth anniversary of the date on which our Board adopts the Plan.

Executive Bonus Plan

Also in connection with our IPO, we adopted a Senior Executive Incentive Bonus Plan, or the Executive Bonus Plan. The Executive Bonus Plan is designed to provide an incentive for superior work and to motivate covered key executives toward even greater achievement and business results, to tie their goals and interests to those of us and our shareholders and to enable us to attract and retain highly qualified executives. The principal features of the Executive Bonus Plan are summarized below.

The Executive Bonus Plan is an incentive bonus plan under which certain key executives, including our named executive officers, are eligible to receive bonus payments with respect to a specified period (for example, our fiscal year). Bonuses will generally be payable under the Executive Bonus Plan upon the attainment of pre‑established performance goals. Notwithstanding the foregoing, we may pay bonuses (including, without limitation, discretionary bonuses) to participants under the Executive Bonus Plan based upon such other terms and conditions as the compensation committee may in its discretion determine.

The performance goals under the Executive Bonus Plan will relate to one or more financial, operational or other metrics with respect to individual or company performance with respect to us or any of our subsidiaries, including, but not limited to, the following possible performance goals: (i) adjusted net earnings or losses (either before or after one or more of the following: (A) interest, (B) taxes, (C) depreciation, (D) amortization and (E) non‑cash equity‑based compensation expense); (ii) gross or net sales or revenue or sales or revenue growth; (iii) net income (either before or after taxes); (iv) adjusted net income; (v) operating earnings or profit (either before or after taxes); (vi) cash flow (including, but not limited to, operating cash flow and free cash flow); (vii) return on assets; (viii) return on capital (or invested capital) and cost of capital; (ix) return on shareholders’ equity; (x) total shareholder return; (xi) return on sales; (xii) gross or net profit or operating margin; (xiii) costs, reductions in costs and cost control measures; (xiv) expenses; (xv) working capital; (xvi) earnings or loss per share; (xvii) adjusted earnings or loss per share; (xviii) price per share or dividends per share (or appreciation in and/or maintenance of such price or dividends); (xix) regulatory achievements or compliance (including, without limitation, regulatory body approval for commercialization of a product); (xx) implementation or completion of critical projects; (xxi) market share; (xxii) economic value; (xxiii) productivity; (xxiv) operating efficiency; (xxv) economic value‑added; (xxvi) cash flow return on capital; (xxvii) return on net assets; (xxviii) funds from operations; (xxix) funds available for distributions; (xxx) market penetration and geographic business expansion; (xxxi) customer satisfaction/growth; (xxxii) recruitment and retention of personnel; (xxxiii) human resources management; (xxxiv) supervision of litigation and other legal matters; (xxxv) strategic partnerships and transactions; (xxxvi) financial ratios (including those measuring liquidity, activity, profitability or leverage); (xxxvii) financing and other capital raising transactions; (xxxviii) year‑end cash; (xxxix) acquisition activity and marketing initiatives; and (xl) safety metrics, any of which may be measured either in absolute terms or as compared to any incremental increase or decrease or as compared to results of a peer group or to market performance indicators or indices.

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The Executive Bonus Plan also permits the plan administrator, in its sole discretion, to provide for objectively determinable adjustments to the applicable performance criteria in setting performance goals. Such adjustments may include, but are not limited to, one or more of the following: (i) items related to a change in Applicable Accounting Standards; (ii) items relating to financing activities; (iii) expenses for restructuring or productivity initiatives; (iv) other non‑operating items; (v) items related to acquisitions; (vi) items attributable to the business operations of any entity acquired by the Company during the Performance Period; (vii) items related to the sale or disposition of a business or segment of a business; (viii) items related to discontinued operations that do not qualify as a segment of a business under Applicable Accounting Standards; (ix) items attributable to any stock dividend, stock split, combination or exchange of stock occurring during the Performance Period; (x) any other items of significant income or expense which are determined to be appropriate adjustments; (xi) items relating to unusual or infrequent corporate transactions, events or developments, (xii) items related to amortization of acquired intangible assets; (xiii) items that are outside the scope of the Company’s core, on‑going business activities; (xiv) items related to acquired in‑process research and development; (xv) items relating to changes in tax laws; (xvi) items relating to major licensing or partnership arrangements; (xvii) items relating to asset impairment charges; (xviii) items relating to gains or losses for litigation, arbitration and contractual settlements; (xix) items attributable to expenses incurred in connection with a reduction in force or early retirement initiative; (xx) items relating to foreign exchange or currency transactions and/or fluctuations; or (xxi) items relating to any other unusual or nonrecurring events or changes in Applicable Law, Applicable Accounting Standards or business conditions. For all Awards intended to qualify as Performance‑Based Compensation, such determinations shall be made within the time prescribed by, and otherwise in compliance with, Section 162(m) of the Code.

The Executive Bonus Plan is administered by the compensation committee. The compensation committee will select the participants in the Executive Bonus Plan and any performance goals to be utilized with respect to the participants, establish the bonus formulas for each participant’s annual bonus, and certify whether any applicable performance goals have been met with respect to a given performance period. The Executive Bonus Plan provides that we may amend or terminate the Executive Bonus Plan at any time in our sole discretion. Any amendments to the Executive Bonus Plan will require shareholder approval only to the extent required by applicable law, rule or regulation. The Executive Bonus Plan will expire on the earlier of:

• the material modification of the Executive Bonus Plan; and

• the first shareholders meeting at which members of our board of directors are elected during 2021.

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CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS

Procedures for Review, Approval and Ratification of Related Person Transactions

Our board of directors has adopted a code of business conduct and ethics in whereby the board of directors or its authorized committee will review on at least a quarterly basis all transactions with related persons that are required to be disclosed under SEC rules and, when appropriate, initially authorize or ratify all such transactions. We have established an audit committee consisting solely of independent directors whose functions are set forth in the audit committee charter. One of the audit committee’s functions is to review and approve all relationships and transactions in which we and our directors, director nominees and executive officers and their immediate family members, as well as holders of more than 5% of any class of our voting securities and their immediate family members, have a direct or indirect material interest.

The code of business conduct and ethics provides that, in determining whether or not to recommend the initial approval or ratification of a transaction with a related person, the board of directors or its authorized committee should consider all of the relevant facts and circumstances available, including (if applicable) but not limited to: (i) whether there is an appropriate business justification for the transaction; (ii) the benefits that accrue to us as a result of the transaction; (iii) the terms available to unrelated third parties entering into similar transactions; (iv) the impact of the transaction on a director’s independence (in the event the related person is a director, an immediate family member of a director or an entity in which a director or an immediate family member of a director is a partner, shareholder, member or executive officer); (v) the availability of other sources for comparable services; (vi) whether it is a single transaction or a series of ongoing, related transactions; and (vii) whether entering into the transaction would be consistent with the code of business conduct and ethics.

Registration Rights Agreement

We have entered into a registration rights agreement with certain shareholders, including Energy Capital Partners and Special Situations Fund III, L.P. Pursuant to this registration rights agreement, we are required to cause a shelf registration statement to be filed as soon as permitted by the applicable securities laws. Also pursuant to the registration rights agreement, certain shareholders have the right to demand we undertake an underwritten offering of such shareholders’ shares of our common stock at any time after the first anniversary of the consummation of our IPO. Pursuant to this provision, Energy Capital Partners has the right to demand up to five underwritten offerings, and Special Situations Fund III, L.P. has the right to demand up to two underwritten offerings, so long as the minimum expected offering price is $15 million. In addition, shareholders have certain “piggyback” rights when we undertake an underwritten offering of shares of our common stock, subject to customary cutbacks.

Preferred Shareholder Registration Rights Agreement

In connection with the sale of Series A Preferred Stock that occurred in December 2016, we entered into a registration rights agreement with the holders of Series A Preferred Stock, who now comprise a portion of the selling shareholders. The Series A Preferred Stock automatically converted into shares of common stock upon the consummation of the IPO. Pursuant to this registration rights agreement, we are required to use commercially reasonable efforts to cause a shelf registration statement for the converted common stock to become effective no later than 180 days following the consummation of the IPO. Also pursuant to this registration rights agreement, each holder of converted Series A Preferred Stock has the right to demand we undertake an underwritten offering of such shareholders’ shares of our common stock at any time after the six‑month anniversary of the consummation of our IPO up to a maximum of five underwritten offerings in the aggregate, each of which must have a minimum expected offering price of $15 million. In addition, holders have certain “piggyback” rights when we undertake an underwritten offering of shares of our common stock, subject to customary cutbacks.

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Stockholders Agreement

We have entered into a stockholders agreement with Energy Capital Partners that provides Energy Capital Partners and its affiliates who hold our shares certain rights to designate nominees for election to our board of directors. The stockholders agreement provides that, subject to compliance with applicable law and stock exchange rules, for so long as Energy Capital Partners and its affiliates beneficially own at least 30% of our common stock then outstanding, it shall be entitled to designate a number of directors equal to one fewer than a majority of the directors; for so long as Energy Capital Partners and its affiliates beneficially own at least 20% of our common stock then outstanding, it shall be entitled to designate the greater of three directors and 25% of the total number of directors (rounded up to the next whole number); and for so long as Energy Capital Partners and its affiliates beneficially own at least 10% of our common stock then outstanding, it shall be entitled to designate the greater of two directors and 15% of the total number of directors (rounded up to the next whole number); and for so long as Energy Capital Partners and its affiliates beneficially own at least 5% of our common stock then outstanding, it shall be entitled to designate one director.

Pursuant to the stockholders agreement, our board of directors initially consisted of ten directors after our IPO, five of which were designated by Energy Capital Partners.

Energy Capital Partners is entitled to designate the replacement for any of its board designees whose board service terminates prior to the end of the director’s term regardless of their beneficial ownership at such time. Energy Capital Partners also has the right, but not the obligation, to designate at least one of its nominees as a member to each of the committees of our board of directors for so long as it has the right to designate at least one director, subject to compliance with applicable law and stock exchange rules.

For so long as Energy Capital Partners and its affiliates hold at least 30% of our outstanding common stock, we and our subsidiaries shall not, without the approval of Energy Capital Partners and its affiliates:

• effect any transaction or series of related transactions that would result in a change of control of our company or a sale of all or substantially all of our assets (or enter into any agreement to take such action);

• issue any additional equity securities other than under equity compensation plans approved by our shareholders or intra‑company issuances among the company and our subsidiaries; or

• change the size of our board of directors.

Additionally, for as long as Energy Capital Partners and its affiliates hold at least 10% of our outstanding common stock, any directors designated by Energy Capital Partners will have certain information and access rights to our management, including the right to receive our annual budget, business plan and financial forecasts.

The stockholders agreement will terminate upon the earliest to occur of (a) the dissolution of the Company, (b) the date on which Energy Capital Partners and its affiliates cease to own any outstanding shares of our common stock and (c) the written agreement of the company and Energy Capital Partners.

Indemnification Agreements

Our bylaws provide that we will indemnify our directors and officers to the fullest extent permitted by law. In addition, we have entered into separate indemnification agreements with our directors and certain officers. Each indemnification agreement will provide, among other things, for indemnification to the fullest extent permitted by law and our bylaws against any and all expenses, judgments, fines, penalties and amounts paid in settlement of any claim. The indemnification agreements will provide for the advancement or payment of all expenses to the indemnitee and for the reimbursement to us if it is found that such indemnitee is not entitled to such indemnification under applicable law and our bylaws.

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Payments to Executive Officers

For the years ended December 31, 2015 and 2016, we paid Dale Redman, our Chief Executive Officer, $164,000 and $186,000, respectively, for reimbursement of costs incurred through use of his aircraft.

We rent certain flowback equipment from PD Properties, an entity jointly owned by Dale Redman. For the years ended December 31, 2015 and 2016, we paid $192,000 and $192,000, respectively.

We lease our corporate headquarters from South Midkiff Partners LLC, a entity owned jointly by Dale Redman, David Sledge, Spencer D. Armour, III and Jeff Smith pursuant to a five‑year lease agreement with a five‑year extension option requiring a base rent of $72,000 per year. In addition, we lease five properties adjacent to our corporate office from South Midkiff Partners LLC with annual base rents of $30,000, $30,000, $90,000, $90,000, and $180,000.

Jordan Frosch is a corporate sales manager for our company and the son‑in‑law of Dale Redman. Mr. Frosch received total compensation of approximately $137,500 in 2016 for his services. His current annual salary is approximately $179,000.

Initial Public Offering

On March 16, 2017, the registration statement on Form S‑1 (File No. 333‑215940) relating to our IPO was declared effective by the SEC. The IPO closed on March 22, 2017, at which time we issued and sold 13,250,000 shares of common stock, and certain selling shareholders sold 11,750,000 shares of common stock, at a price to the public of $14.00 per share. We received cash proceeds of approximately $170.1 million from this transaction, net of underwriting discounts and commissions.

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SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

The following table sets forth the beneficial ownership of our common stock that, as of October 27, 2017, was owned by:

• each person known to us to beneficially own more than 5% of any class of our outstanding common stock;

• each of our director and director nominees;

• our named executive officers; and

• all of our directors, director nominees and executive officers as a group.

All information with respect to beneficial ownership has been furnished by the respective directors, officers or 5% or more stockholders, as the case may be. The amounts and percentage of shares of common stock beneficially owned are reported on the basis of regulations of the SEC governing the determination of beneficial ownership of securities. Under the rules of the SEC, a person is deemed to be a “beneficial owner” of a security if that person has or shares “voting power,” which includes the power to vote or to direct the voting of such security, or “investment power,” which includes the power to dispose of or to direct the disposition of such security. In computing the number of shares beneficially owned by a person and the percentage ownership of that person, common stock subject to options or warrants held by that person that are currently exercisable or exercisable within 60 days of the date of this prospectus, if any, are deemed outstanding, but are not deemed outstanding for computing the percentage ownership of any other person. Except as indicated by footnote, the persons named in the table below have sole voting and investment power with respect to all shares of common stock shown as beneficially owned by them, subject to community property laws where applicable.

Name of Beneficial Owner(1)	Shares Beneficially Owned
5% Stockholders	Number	Percentage
Energy Capital Partners(2)	34,527,928	41.6	%
Double Black Diamond Offshore Ltd.(3)	6,261,891	7.5	%
Adage Capital Partners, L.P.(4)	4,179,201	5.0	%
Directors/Director Nominees/Named Executive Officers
Dale Redman(5)	1,369,262	1.6	%
David Sledge(5)	785,783	*
Jeffrey Smith(5)	1,057,722	1.2%
Spencer D. Armour, III(5)	785,783	*
Steven Beal(5)	22,558	*
Schuyler E. Coppedge(5)	—	—
Stephen Herman(5)	—	—
Matthew H. Himler(5)	—	—
Peter Labbat(5)	—	—
Alan E. Douglas(5)	7,558	*
Christopher Leininger(5)	—	—
Jack B. Moore(5)	7,558	*
All Directors, Director Nominees and Executive Officers as a group (14 persons)(5)	4,058,431	4.7	%

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____________________

* Less than 1%.

(1) Unless otherwise indicated, the address for each beneficial owners in this table is c/o ProPetro Holding Corp., 1706 S. Midkiff, Bldg. B, Midland, Texas 79701.

(2) Includes (i) 517,092 shares held by Energy Capital Partners II, LP (“ECPII”), (ii) 16,843,582 shares held by Energy Capital Partners II‑A, LP (“ECP II‑A”), (iii) 3,526,945 shares held by Energy Capital Partners II‑B, LP (“ECP II‑B”), (iv) 6,195,410 shares held by Energy Capital Partners II‑C (Direct IP), LP (“ECP II‑C”), (v) 4,151,258 shares held by Energy Capital Partners II‑D, LP (“ECP II‑D”), and (vi) 3,293,641 shares held by Energy Capital Partners II (Midland Co‑Invest), LP (“ECP Co‑Invest”). Each of ECP II, ECP II‑A, ECP II‑B, ECP II‑C and ECP II‑D is managed by its general partner, Energy Capital Partners GP II, LP. Energy Capital Partners GP II, LP is managed by its general partner, Energy Capital Partners II, LLC (“Energy Capital Partners”). As a result, each of Energy Capital Partners GP II, LP and Energy Capital Partners may be deemed to share beneficial ownership of the shares held by ECP II, ECP II‑A, ECP II‑B, ECP II‑C and ECP II‑D. ECP Co‑Invest is managed by its general partner, Energy Capital Partners GP II Co‑Investment (Midland), LLC, which is managed by its sole member, Energy Capital Partners. Douglas W. Kimmelman, Peter Labbat, Thomas K. Lane, Tyler Reeder and Andrew D. Singer are the managing members of, and Rahman D’Argenio is a partner of, Energy Capital Partners and share the power to direct the voting and disposition of the shares beneficially owned by Energy Capital Partners. Each such individual disclaims beneficial ownership of such shares. The address for Energy Capital Partners and each of the other persons and entities in this footnote is 51 John F. Kennedy Parkway, Suite 200, Short Hills, New Jersey 07078.

(3) Includes (i) 5,811,097 shares held by Double Black Diamond Offshore Ltd. (“Double Black Diamond”), (ii) 354,905 shares held by Black Diamond Energy L/S Offshore Ltd. (“Black Diamond Energy”) and (iii) 95,889 shares held by Black Diamond Offshore Ltd. (“Black Diamond”). The investment advisor of each of Double Black Diamond, Black Diamond Energy and Black Diamond is Carlson Capital, L.P., and the general partner of Carlson Capital, L.P. is Asgard Investment Corp. II. The sole stockholder of Asgard Investment Corp. II. is Asgard Investment Corp., and Clint D. Carlson is its controlling person. The business address of each person and entity named in this footnote 3 is 2100 McKinney Ave, Suite 1800, Dallas, TX 75201.

(4) Adage Capital Partners, GP, LLC (“ACPGP”), serves as the general partner of Adage Capital Partners, LP, a Delaware limited partnership (the “Fund”) and as such has discretion over the portfolio of securities beneficially owned by the Fund. Adage Capital Advisors, LLC, a Delaware limited liability company (“ACA”), is managing member of ACPGP and directs ACPGP’s operations. Robert Atchinson and Phillip Gross are the managing members of ACPGP and ACA and general partners of the Fund. Robert Atchinson and Phillip Gross disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interest therein.

(5) Includes, for each executive officer, director and director nominee, shares of common stock that are issuable pursuant to options that are currently exercisable or exercisable within 60 days.

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SELLING SHAREHOLDERS

This prospectus covers the offer and sale of up to an aggregate of 10,000,000 shares of common stock that may be offered and sold from time to time by the selling shareholders identified below under this prospectus, subject to any appropriate adjustment as a result of any subdivision, split, combination or other reclassification of our common stock.

We have prepared the table, the paragraph immediately following this paragraph, and the related notes based on information supplied to us by the selling shareholders on or prior to October 30, 2017. We have not sought to verify such information.

Beneficial ownership has been determined under rules promulgated by the SEC. The information does not necessarily indicate beneficial ownership for any other purpose. Shares of common stock subject to currently exercisable and convertible securities currently convertible, or exercisable or convertible within 60 days after the date of this prospectus, are deemed outstanding for purposes of computing the percentage beneficially owned by the person or entity holding such securities but are not deemed outstanding for purposes of computing the percentage beneficially owned by any other person or entity.

Selling Shareholder	Shares Beneficially Owned Prior to this Offering	Number of Shares Offered Hereby	Shares Beneficially Owned After this Offering	Percentage of Class Beneficially Owned
				Before Offering		After Offering
Energy Capital Partners II, LP(1)	517,092	149,761	367,331	0.6	%	0.4	%
Energy Capital Partners II-A, LP(1)	16,843,582	4,878,249	11,965,333	20.3	%	14.4	%
Energy Capital Partners II-B, LP(1)	3,526,945	1,021,476	2,505,469	4.2	%	3.0	%
Energy Capital Partners II-C (Direct IP), LP(1)	6,195,410	1,794,318	4,401,092	7.5	%	5.3	%
Energy Capital Partners II-D, LP(1)	4,151,258	1,202,290	2,948,968	5.0	%	3.6	%
Energy Capital Partners II (Midland Co-Invest), LP(1)	3,293,641	953,906	2,339,735	4.0	%	2.8	%
Total	34,527,928	10,000,000	24,527,928	41.6	%	29.5	%

____________________

(1) Each of Energy Capital Partners II, LP (“ECP II”), Energy Capital Partners II-A, LP (“ECP II-A”), Energy Capital Partners II-B, LP (“ECP II-B”), Energy Capital Partners II-C (Direct IP), LP (“ECP II-C”) and Energy Capital Partners II-D, LP (“ECP II-D”) is managed by its general partner, Energy Capital Partners GP II, LP. Energy Capital Partners GP II, LP is managed by its general partner, Energy Capital Partners II, LLC (“Energy Capital Partners”). As a result, each of Energy Capital Partners GP II, LP and Energy Capital Partners may be deemed to share beneficial ownership of the shares held by ECP II, ECP II-A, ECP II-B, ECP II-C and ECP II-D. Energy Capital Partners II (Midland Co-Invest), LP is managed by its general partner, Energy Capital Partners GP II Co-Investment (Midland), LLC, which is managed by its sole member, Energy Capital Partners. Douglas W. Kimmelman, Peter Labbat, Thomas K. Lane, Tyler Reeder and Andrew D. Singer are the managing members of, and Rahman D’Argenio is a partner of, Energy Capital Partners and share the power to direct the voting and disposition of the shares beneficially owned by Energy Capital Partners. Each such individual disclaims beneficial ownership of such shares. The address for Energy Capital Partners and each of the other persons and entities in this footnote is 51 John F. Kennedy Parkway, Suite 200, Short Hills, New Jersey 07078.

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DESCRIPTION OF CAPITAL STOCK

We are a Delaware corporation. The following description of the certificate of incorporation and bylaws of ProPetro Holding Corp. does not purport to be complete and is qualified in its entirety by reference to the provisions of applicable law and to our certificate of incorporation, bylaws and stockholders agreement, which are filed as exhibits to the registration statement of which this prospectus is a part.

Common Stock

Except as provided by law or in a preferred stock designation, holders of common stock are entitled to one vote for each share held of record on all matters submitted to a vote of the shareholder, have the exclusive right to vote for the election of directors and do not have cumulative voting rights. Except as otherwise required by law, holders of common stock, are not entitled to vote on any amendment to the certificate of incorporation (including any certificate of designations relating to any series of preferred stock) that relates solely to the terms of any outstanding series of preferred stock if the holders of such affected series are entitled, either separately or together with the holders of one or more other such series, to vote thereon pursuant to the certificate of incorporation (including any certificate of designations relating to any series of preferred stock) or pursuant to the DGCL. Subject to prior rights and preferences that may be applicable to any outstanding shares or series of preferred stock, holders of common stock are entitled to receive ratably in proportion to the shares of common stock held by them such dividends (payable in cash, stock or otherwise), if any, as may be declared from time to time by our board of directors out of funds legally available for dividend payments. All outstanding shares of common stock are fully paid and non‑assessable. The holders of common stock have no preferences or rights of conversion, exchange, pre‑emption or other subscription rights. There are no redemption or sinking fund provisions applicable to the common stock. In the event of any voluntary or involuntary liquidation, dissolution or winding‑up of our affairs, holders of common stock will be entitled to share ratably in our assets in proportion to the shares of common stock held by them that are remaining after payment or provision for payment of all of our debts and obligations and after distribution in full of preferential amounts to be distributed to holders of outstanding shares of preferred stock, if any.

Preferred Stock

Our certificate of incorporation authorizes our board of directors, subject to any limitations prescribed by law and in our stockholders agreement, without further stockholder approval, to establish and to issue from time to time one or more classes or series of preferred stock, par value $0.001 per share, covering up to an aggregate of 30,000,000 shares of preferred stock. Each class or series of preferred stock will cover the number of shares and will have the powers, preferences, rights, qualifications, limitations and restrictions determined by the board of directors, which may include, among others, dividend rights, liquidation preferences, voting rights, conversion rights, preemptive rights and redemption rights. Except as provided by law or in a preferred stock designation, the holders of preferred stock will not be entitled to vote at or receive notice of any meeting of stockholders.

Anti‑Takeover Effects of Provisions of Our Certificate of Incorporation, our Bylaws and Delaware Law

Some provisions of Delaware law, our certificate of incorporation and our bylaws contain provisions that could make the following transactions more difficult: acquisitions of us by means of a tender offer, a proxy contest or otherwise or removal of our directors. These provisions may also have the effect of preventing changes in our management. It is possible that these provisions could make it more difficult to accomplish or could deter transactions that stockholders may otherwise consider to be in their best interest or in our best interests, including transactions that might result in a premium over the market price for our shares.

These provisions are expected to discourage coercive takeover practices and inadequate takeover bids. These provisions are also designed to encourage persons seeking to acquire control of us to first

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negotiate with us. We believe that the benefits of increased protection and our potential ability to negotiate with the proponent of an unfriendly or unsolicited proposal to acquire or restructure us outweigh the disadvantages of discouraging these proposals because, among other things, negotiation of these proposals could result in an improvement of their terms.

Delaware Law

Section 203 of the DGCL prohibits a Delaware corporation, including those whose securities are listed for trading on the NYSE, from engaging in any business combination (as defined in Section 203) with any interested stockholder (as defined in Section 203) for a period of three years following the date that the stockholder became an interested stockholder, unless:

• the business combination or the transaction which resulted in the shareholder becoming an interested shareholder is approved by the board of directors before the date the interested shareholder attained that status;

• upon consummation of the transaction that resulted in the shareholder becoming an interested shareholder, the interested shareholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced; or

• on or after such time the business combination is approved by the board of directors and authorized at a meeting of shareholders by at least two‑thirds of the outstanding voting stock that is not owned by the interested shareholder.

A corporation may elect not to be subject to Section 203 of the DGCL. We have elected to not be subject to the provisions of Section 203 of the DGCL.

See also “Certain Relationships and Related Party Transactions ‑ Stockholders Agreement” for a description of our stockholders agreement, which provides Energy Capital Partners certain rights to designate nominees for election to our board of directors.

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is American Stock Transfer & Trust Company, LLC.

Listing

We list our common stock on the NYSE under the symbol “PUMP.”

Sales of Restricted Shares

All 28,706,961 shares of common stock that were sold in our IPO are, and all of the shares of common stock to be sold in this offering will be, freely tradable without restriction or further registration under the Securities Act, unless the shares are held by any of our “affiliates” as such term is defined in Rule 144 under the Securities Act. All remaining shares of our common stock outstanding, which were issued before our IPO, are deemed “restricted securities” as such term is defined under Rule 144. The restricted securities were issued and sold by us in private transactions and are eligible for public sale only if registered under the Securities Act or if they qualify for an exemption from registration under Rule 144 or Rule 701 under the Securities Act, which rules are summarized below. Pursuant to our registration rights agreements, we have agreed to register the resale of all of the shares that we issued prior to our IPO, including the shares sold pursuant to this offering.

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Lock-up Agreements

We, all of our directors and executive officers and certain holders of our outstanding common stock will agree not to sell any common stock or securities convertible into or exchangeable for shares of common stock for a period of 90 days from the date of this prospectus, subject to certain exceptions. For a description of these lock-up provisions, please see the section entitled “Underwriting.”

Rule 144

In general, under Rule 144 under the Securities Act as currently in effect, a person (or persons whose shares are aggregated) who is not deemed to have been an affiliate of ours at any time during the three months preceding a sale, and who has beneficially owned restricted securities within the meaning of Rule 144 for a least six months (including any period of consecutive ownership of preceding non-affiliated holders) would be entitled to sell those shares, subject only to the availability of current public information about us. A non-affiliated person who has beneficially owned restricted securities within the meaning of Rule 144 for at least one year would be entitled to sell those shares without regard to the provisions of Rule 144.

A person (or persons whose shares are aggregated) who is deemed to be an affiliate of ours and who has beneficially owned restricted securities within the meaning of Rule 144 for at least six months would be entitled to sell within any three-month period a number of shares that does not exceed the greater of one percent of the then outstanding shares of our common stock or the average weekly trading volume of our common stock reported through NYSE during the four calendar weeks preceding the filing of notice of the sale. Such sales are also subject to certain manner of sale provisions, notice requirements and the availability of current public information about us.

Rule 701

In general, under Rule 701 under the Securities Act, any of our employees, directors, officers, consultants or advisors who purchases shares from us in connection with a compensatory stock or option plan or other written agreement before the effective date of this offering is entitled to sell such shares 90 days after the effective date of this offering in reliance on Rule 144, without having to comply with the holding period requirement of Rule 144 and, in the case of non-affiliates, without having to comply with the public information, volume limitation or notice filing provisions of Rule 144. The SEC has indicated that Rule 701 will apply to typical stock options granted by an issuer before it becomes subject to the reporting requirements of the Exchange Act, along with the shares acquired upon exercise of such options, including exercises after the date of this prospectus.

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MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES TO NON‑U.S. HOLDERS

The following discussion is a summary of the material U.S. federal income tax consequences to Non‑U.S. Holders (as defined below) of the purchase, ownership and disposition of our common stock issued pursuant to this offering, but does not purport to be a complete analysis of all potential tax effects. The effects of other U.S. federal tax laws, such as estate and gift tax laws, and any applicable state, local or non‑U.S. tax laws are not discussed. This discussion is based on the U.S. Internal Revenue Code of 1986, as amended (the “Code”), Treasury regulations promulgated thereunder (“Treasury Regulations”), judicial decisions, and published rulings and administrative pronouncements of the U.S. Internal Revenue Service (the “IRS”), in each case as in effect as of the date hereof. These authorities may change or be subject to differing interpretations. Any such change or differing interpretation may be applied retroactively in a manner that could adversely affect a Non‑U.S. Holder of our common stock. We have not sought and will not seek any rulings from the IRS regarding the matters discussed below. There can be no assurance the IRS or a court will not take a contrary position to those discussed below regarding the tax consequences of the purchase, ownership and disposition of our common stock.

This discussion is limited to Non‑U.S. Holders that hold our common stock as a “capital asset” within the meaning of Section 1221 of the Code (generally, property held for investment). This discussion does not address all U.S. federal income tax consequences relevant to a Non‑U.S. Holder’s particular circumstances, including the impact of the Medicare contribution tax on net investment income. In addition, it does not address consequences relevant to Non‑U.S. Holders subject to special rules, including, without limitation:

• U.S. expatriates and former citizens or long‑term residents of the United States;

• persons subject to the alternative minimum tax;

• persons holding our common stock as part of a hedge, straddle or other risk reduction strategy or as part of a conversion transaction or other integrated investment;

• banks, insurance companies, and other financial institutions;

• real estate investment trusts or regulated investment companies;

• brokers, dealers or traders in securities;

• “controlled foreign corporations,” “passive foreign investment companies,” and corporations that accumulate earnings to avoid U.S. federal income tax;

• partnerships or other entities or arrangements treated as partnerships for U.S. federal income tax purposes (and investors therein);

• tax‑exempt organizations or governmental organizations;

• persons deemed to sell our common stock under the constructive sale provisions of the Code;

• persons who hold or receive our common stock pursuant to the exercise of any employee stock option or otherwise as compensation;

• “qualified foreign pension funds” (within the meaning of Section 897(1)(2) of the Code and entities, all of the interests of which are held by qualified foreign pension funds); and

• tax‑qualified retirement plans.

If an entity treated as a partnership for U.S. federal income tax purposes holds our common stock, the tax treatment of a partner in the partnership will depend on the status of the partner, the activities of the

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partnership and certain determinations made at the partner level. Accordingly, partnerships holding our common stock and partners in such partnerships should consult their tax advisors regarding the U.S. federal income tax consequences to them.

THIS DISCUSSION IS FOR INFORMATIONAL PURPOSES ONLY AND IS NOT TAX ADVICE. INVESTORS SHOULD CONSULT THEIR TAX ADVISORS WITH RESPECT TO THE APPLICATION OF THE U.S. FEDERAL INCOME TAX LAWS TO THEIR PARTICULAR SITUATIONS AS WELL AS ANY TAX CONSEQUENCES OF THE PURCHASE, OWNERSHIP AND DISPOSITION OF OUR COMMON STOCK ARISING UNDER THE U.S. FEDERAL ESTATE OR GIFT TAX LAWS OR UNDER THE LAWS OF ANY STATE, LOCAL OR NON‑U.S. TAXING JURISDICTION OR UNDER ANY APPLICABLE INCOME TAX TREATY.

Definition of a Non‑U.S. Holder

For purposes of this discussion, a “Non‑U.S. Holder” is any beneficial owner of our common stock that is neither a “U.S. person” nor an entity treated as a partnership for U.S. federal income tax purposes. A U.S. person is any person that, for U.S. federal income tax purposes, is or is treated as any of the following:

• an individual who is a citizen or resident of the United States;

• a corporation, or an entity treated as a corporation for U.S. federal income tax purposes, created or organized under the laws of the United States, any state thereof, or the District of Columbia;

• an estate, the income of which is subject to U.S. federal income tax regardless of its source; or

• a trust that (1) is subject to the primary supervision of a U.S. court and the control of one or more “United States persons” (within the meaning of Section 7701(a)(30) of the Code), or (2) has a valid election in effect to be treated as a United States person for U.S. federal income tax purposes.

Distributions

As described in the section entitled “Dividend Policy” we do not anticipate declaring or paying dividends to holders of our common stock in the foreseeable future. However, if we do make distributions of cash or property on our common stock, such distributions will constitute dividends for U.S. federal income tax purposes to the extent paid from our current or accumulated earnings and profits, as determined under U.S. federal income tax principles. Amounts not treated as dividends for U.S. federal income tax purposes will constitute a return of capital and first be applied against and reduce a Non‑U.S. Holder’s adjusted tax basis in its common stock, but not below zero. Any excess will be treated as capital gain and will be treated as described below under “—Sale or Other Taxable Disposition.”

Subject to the discussion below on effectively connected income, dividends paid to a Non‑U.S. Holder of our common stock will be subject to U.S. federal withholding tax at a rate of 30% of the gross amount of the dividends (or such lower rate specified by an applicable income tax treaty, provided the Non‑U.S. Holder furnishes to us or our paying agent prior to the payment of dividends a valid IRS Form W‑8BEN or W‑8BEN‑E (or other applicable documentation) certifying qualification for the lower treaty rate). A Non‑U.S. Holder that does not timely furnish the required documentation, but that qualifies for a reduced treaty rate, may obtain a refund of any excess amounts withheld by timely filing an appropriate claim for refund with the IRS. Non‑U.S. Holders should consult their tax advisors regarding their entitlement to benefits under any applicable income tax treaty.

If dividends paid to a Non‑U.S. Holder are effectively connected with the Non‑U.S. Holder’s conduct of a trade or business within the United States (and, if required by an applicable income tax treaty, the Non‑U.S. Holder maintains a permanent establishment in the United States to which such dividends are attributable), the Non‑U.S. Holder will be exempt from the U.S. federal withholding tax described above. To

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claim the exemption, the Non‑U.S. Holder must furnish to the applicable withholding agent a valid IRS Form W‑8ECI, certifying that the dividends are effectively connected with the Non‑U.S. Holder’s conduct of a trade or business within the United States.

Any such effectively connected dividends will be subject to U.S. federal income tax on a net income basis at the regular graduated rates. A Non‑U.S. Holder that is a corporation also may be subject to a branch profits tax at a rate of 30% (or such lower rate specified by an applicable income tax treaty) on its effectively connected earnings and profits (as adjusted for certain items), which will include such effectively connected dividends. Non‑U.S. Holders should consult their tax advisors regarding any applicable tax treaties that may provide for different rules.

Sale or Other Taxable Disposition

A Non‑U.S. Holder will not be subject to U.S. federal income tax on any gain realized upon the sale or other taxable disposition of our common stock unless:

• the gain is effectively connected with the Non‑U.S. Holder’s conduct of a trade or business within the United States (and, if required by an applicable income tax treaty, the Non‑U.S. Holder maintains a permanent establishment in the United States to which such gain is attributable);

• the Non‑U.S. Holder is a nonresident alien individual present in the United States for 183 days or more during the taxable year of the disposition and certain other requirements are met; or

• our common stock constitutes a United States real property interest (“USRPI”) by reason of our status as a United States real property holding corporation (“USRPHC”) for U.S. federal income tax purposes.

Gain described in the first bullet point above generally will be subject to U.S. federal income tax on a net income basis at the regular graduated rates. A Non‑U.S. Holder that is a corporation also may be subject to a branch profits tax at a rate of 30% (or such lower rate specified by an applicable income tax treaty) on its effectively connected earnings and profits (as adjusted for certain items), which will include such effectively connected gain.

A Non‑U.S. Holder described in the second bullet point above will be subject to U.S. federal income tax at a rate of 30% (or such lower rate specified by an applicable income tax treaty) on any gain derived from the disposition, which may generally be offset by U.S. source capital losses of the Non‑U.S. Holder (even though the individual is not considered a resident of the United States), provided the Non‑U.S. Holder has timely filed U.S. federal income tax returns with respect to such losses.

With respect to the third bullet point above, we believe we currently are not, and do not anticipate becoming, a USRPHC. Because the determination of whether we are a USRPHC depends, however, on the fair market value of our USRPIs relative to the fair market value of our non‑U.S. real property interests and our other business assets, there can be no assurance we currently are not a USRPHC or will not become one in the future. Even if we are or were to become a USRPHC, gain arising from the sale or other taxable disposition by a Non‑U.S. Holder of our common stock will not be subject to U.S. federal income tax if our common stock is “regularly traded,” as defined by applicable Treasury Regulations, on an established securities market, and such Non‑U.S. Holder owned, actually and constructively, 5% or less of our common stock throughout the shorter of the five‑year period ending on the date of the sale or other taxable disposition or the Non‑U.S. Holder’s holding period. If we were to become a USRPHC and our common stock were not considered to be “regularly traded” on an established securities market during the calendar year in which the relevant disposition by a Non‑U.S. holder occurs, such Non‑U.S. holder (regardless of the percentage of stock owned) would be subject to U.S. federal income tax on a sale or other taxable disposition of our common stock and a 15% withholding tax would apply to the gross proceeds from such disposition.

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Non‑U.S. Holders should consult their tax advisors regarding potentially applicable income tax treaties that may provide for different rules.

Information Reporting and Backup Withholding

Payments of dividends on our common stock will not be subject to backup withholding, provided the applicable withholding agent does not have actual knowledge or reason to know the Non‑U.S. Holder is a United States person and the Non‑U.S. Holder either certifies its non‑U.S. status, such as by furnishing a valid IRS Form W‑8BEN, W‑8BEN‑E or W‑8ECI, or otherwise establishes an exemption. However, information returns are required to be filed with the IRS in connection with any dividends on our common stock paid to the Non‑U.S. Holder, regardless of whether any tax was actually withheld. In addition, proceeds of the sale or other taxable disposition of our common stock within the United States or conducted through certain U.S.‑related brokers generally will not be subject to backup withholding or information reporting if the applicable withholding agent receives the certification described above and does not have actual knowledge or reason to know that such Non‑U.S. Holder is a United States person, or the Non‑U.S. Holder otherwise establishes an exemption. Proceeds of a disposition of our common stock conducted through a non‑U.S. office of a non‑U.S. broker generally will not be subject to backup withholding or information reporting.

Copies of information returns that are filed with the IRS may also be made available under the provisions of an applicable treaty or agreement to the tax authorities of the country in which the Non‑U.S. Holder resides or is established.

Backup withholding is not an additional tax. Any amounts withheld under the backup withholding rules may be allowed as a refund or a credit against a Non‑U.S. Holder’s U.S. federal income tax liability, provided the required information is timely furnished to the IRS.

Additional Withholding Tax on Payments Made to Foreign Accounts

Withholding taxes may be imposed under Sections 1471 to 1474 of the Code (such Sections commonly referred to as the Foreign Account Tax Compliance Act, or “FATCA”) on certain types of payments made to non‑U.S. financial institutions and certain other non‑U.S. entities. Specifically, a 30% withholding tax may be imposed on dividends on, or gross proceeds from the sale or other disposition of, our common stock paid to a “foreign financial institution” or a “non‑financial foreign entity” (each as defined in the Code) (including, in some cases, when such foreign financial institution or non‑financial foreign entity is acting as an intermediary), unless (1) the foreign financial institution undertakes certain diligence and reporting obligations, (2) the non‑financial foreign entity either certifies it does not have any “substantial United States owners” (as defined in the Code) or furnishes identifying information regarding each direct and indirect substantial United States owner, or (3) the foreign financial institution or non‑financial foreign entity otherwise qualifies for an exemption from these rules. If the payee is a foreign financial institution and is subject to the diligence and reporting requirements in (1) above, it must enter into an agreement with the U.S. Department of the Treasury requiring, among other things, that it undertake to identify accounts held by certain “specified United States persons” or “United States‑owned foreign entities” (each as defined in the Code), annually report certain information about such accounts, and withhold 30% on certain payments to non‑compliant foreign financial institutions and certain other account holders. Foreign financial institutions located in jurisdictions that have an intergovernmental agreement with the United States governing FATCA may be subject to different rules.

Under the applicable Treasury Regulations and administrative guidance, withholding under FATCA generally applies to payments of dividends on our common stock, and will apply to payments of gross proceeds from the sale or other disposition of such stock on or after January 1, 2019.

Prospective investors should consult their tax advisors regarding the potential application of withholding under FATCA to their investment in our common stock.

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UNDERWRITING

We, the selling shareholders and the underwriters named below have entered into an underwriting agreement with respect to the shares being offered. Subject to certain conditions, each underwriter has severally agreed to purchase the number of shares indicated in the following table.

Underwriters	Number of Shares
Goldman Sachs & Co. LLC
Total	10,000,000

The underwriters are committed to take and pay for all of the shares being offered, if any are taken, other than the shares covered by the option described below unless and until this option is exercised.

Goldman Sachs & Co. LLC has an option to buy up to an additional 1,500,000 shares from the selling shareholders to cover sales by the underwriters of a greater number of shares than the total number set forth in the table above. Goldman Sachs & Co. LLC may exercise that option for 30 days.

The following table shows the per share and total underwriting discounts and commissions to be paid to the underwriters by the selling shareholders. Such amounts are shown assuming both no exercise and full exercise of the option to purchase 1,500,000 additional shares.

	Per Share		Total
	Without Option Exercise	With Option Exercise	Without Option Exercise	With Option Exercise
Underwriting discounts and commissions paid by the selling shareholders	$	$	$	$

The expenses of this offering that have been paid or are payable by us or the selling shareholders are estimated to be approximately $          million (excluding underwriting discounts and commissions). We have agreed to pay expenses incurred by the selling shareholders in connection with this offering, other than the underwriting discounts and commissions.

Shares sold by the underwriters to the public will initially be offered at the public offering price set forth on the cover of this prospectus. Any shares sold by the underwriters to securities dealers may be sold at a discount of up to $          per share from the public offering price. After the initial offering of the shares, the representatives may change the offering price and the other selling terms. The offering of the shares by the underwriters is subject to receipt and acceptance and subject to the underwriters’ right to reject any order in whole or in part.

The Company and its officers, directors, certain holders of the Company’s common stock and the selling shareholders have agreed with the underwriters, subject to certain exceptions, not to dispose of or hedge any of their common stock or securities convertible into or exchangeable for shares of common stock, and the Company has agreed not to file a registration statement in respect of any common stock or securities convertible or exchangeable into common stock, during the period from the date of this prospectus continuing through the date 90 days after the date of this prospectus, except with the prior written consent of Goldman Sachs & Co. LLC. This agreement does not apply to any existing employee benefit plans.

We list our common stock on the NYSE under the symbol “PUMP.”

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In connection with the offering, the underwriters may purchase and sell shares of common stock in the open market. These transactions may include short sales, stabilizing transactions and purchases to cover positions created by short sales. Short sales involve the sale by the underwriters of a greater number of shares than they are required to purchase in the offering, and a short position represents the amount of such sales that have not been covered by subsequent purchases. A “covered short position” is a short position that is not greater than the amount of additional shares for which the option described above may be exercised. The underwriters may cover any covered short position by either exercising the option to purchase additional shares or purchasing shares in the open market. In determining the source of shares to cover the covered short position, the underwriters will consider, among other things, the price of shares available for purchase in the open market as compared to the price at which they may purchase additional shares pursuant to the option described above. “Naked” short sales are any short sales that create a short position greater than the amount of additional shares for which the option described above may be exercised. The underwriters must cover any such naked short position by purchasing shares in the open market. A naked short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of the common stock in the open market after pricing that could adversely affect investors who purchase in the offering. Stabilizing transactions consist of various bids for or purchases of common stock made by the underwriters in the open market prior to the completion of the offering.

The underwriters may also impose a penalty bid. This occurs when a particular underwriter repays to the underwriters a portion of the underwriting discount received by it because the representatives have repurchased shares sold by or for the account of such underwriter in stabilizing or short covering transactions.

Purchases to cover a short position and stabilizing transactions, as well as other purchases by the underwriters for their own accounts, may have the effect of preventing or retarding a decline in the market price of the Company’s stock, and together with the imposition of the penalty bid, may stabilize, maintain or otherwise affect the market price of the common stock. As a result, the price of the common stock may be higher than the price that otherwise might exist in the open market. The underwriters are not required to engage in these activities and may end any of these activities at any time. These transactions may be effected on the NYSE, in the over‑the‑counter market or otherwise.

The underwriters and their respective affiliates are full service financial institutions engaged in various activities, which may include sales and trading, commercial and investment banking, advisory, investment management, investment research, principal investment, hedging, market making, brokerage and other financial and non‑financial activities and services. Certain of the underwriters and their respective affiliates have provided, and may in the future provide, a variety of these services to the issuer and to persons and entities with relationships with the issuer, for which they received or will receive customary fees and expenses. Goldman Sachs & Co. LLC was an underwriter in the IPO and received customary fees in that transaction. In addition, affiliates of several of the underwriters are lenders under our revolving credit facility. Goldman Sachs Bank USA, an affiliate of Goldman Sachs & Co. LLC, is a co-syndication agent and joint bookrunner along with certain other lenders.

In the ordinary course of their various business activities, the underwriters and their respective affiliates, officers, directors and employees may purchase, sell or hold a broad array of investments and actively trade securities, derivatives, loans, commodities, currencies, credit default swaps and other financial instruments for their own account and for the accounts of their customers, and such investment and trading activities may involve or relate to assets, securities and/or instruments of the issuer (directly, as collateral securing other obligations or otherwise) and/or persons and entities with relationships with the issuer. The underwriters and their respective affiliates may also communicate independent investment recommendations, market color or trading ideas and/or publish or express independent research views in respect of such assets, securities or instruments and may at any time hold, or recommend to clients that they should acquire, long and/or short positions in such assets, securities and instruments.

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European Economic Area

In relation to each Member State of the European Economic Area which has implemented the Prospectus Directive (each, a “Relative Member State”), an offer to the public of our common shares may not be made in that Relevant Member State, except that an offer to the public in that Relevant Member State of our common shares may be made at any time under the following exemptions under the Prospectus Directive:

• To any legal entity which is a qualified investor as defined in the Prospectus Directive;

• To fewer than 150 natural or legal persons (other than qualified investors as defined in the Prospectus Directive), subject to obtaining the prior consent of the representatives for any such offer; or

• In any other circumstances falling within Article 3(2) of the Prospectus Directive;

provided that no such offer or shares of our common stock shall result in a requirement for the publication by us or any underwriter of a prospectus pursuant to Article 3 of the Prospectus Directive.

For the purposes of this provision, the expression an “offer to public” in relation to our common shares in any Relevant Member State means the communication in any form and by any means of sufficient information on the terms of the offer and our common shares to be offered so as to enable an investor to decide to purchase our common shares, as the same may be varied in that Member State by any measure implementing the Prospectus Directive in that Member State, the expression “Prospectus Directive” means Directive 2003/71/EC (as amended), including by Directive 2010/73/EU and includes any relevant implementing measure in the Relevant Member State.

This European Economic Area selling restriction is in addition to any other selling restrictions set out below.

United Kingdom

In the United Kingdom, this prospectus is only addressed to and directed as qualified investors who are (i) investment professionals falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (the Order); or (ii) high net worth entities and other persons to whom it may lawfully be communicated, falling within Article 49(2)(a) to (d) of the Order (all such persons together being referred to as “relevant persons”). Any investment or investment activity to which this prospectus relates is available only to relevant persons and will only be engaged with relevant persons. Any person who is not a relevant person should not act or relay on this prospectus or any of its contents.

Canada

The securities may be sold in Canada only to purchasers purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45‑106 Prospectus Exemptions or subsection 73.3(1) of the Securities Act (Ontario), and are permitted clients, as defined in National Instrument 31‑103 Registration Requirements, Exemptions, and Ongoing Registrant Obligations. Any resale of the securities must be made in accordance with an exemption form, or in a transaction not subject to, the prospectus requirements of applicable securities laws.

Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this offering memorandum (including any amendment thereto) contains a misrepresentation, provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser’s province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser’s province or territory of these rights or consult with a legal advisor.

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Pursuant to section 3A.3 of National Instrument 33‑105 Underwriting Conflicts (NI 33‑105), the underwriters are not required to comply with the disclosure requirements of NI 33‑105 regarding underwriter conflicts of interest in connection with this offering.

Hong Kong

The shares may not be offered or sold in Hong Kong by means of any document other than (i) in circumstances which do not constitute an offer to the public within the meaning of the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Cap. 32 of the Laws of Hong Kong) (“Companies (Winding Up and Miscellaneous Provisions) Ordinance”) or which do not constitute an invitation to the public within the meaning of the Securities and Futures Ordinance (Cap. 571 of the Laws of Hong Kong) (“Securities and Futures Ordinance”), or (ii) to “professional investors” as defined in the Securities and Futures Ordinance and any rules made thereunder, or (iii) in other circumstances which do not result in the document being a “prospectus” as defined in the Companies (Winding Up and Miscellaneous Provisions) Ordinance, and no advertisement, invitation or document relating to the shares may be issued or may be in the possession of any person for the purpose of issue (in each case whether in Hong Kong or elsewhere), which is directed at, or the contents of which are likely to be accessed or read by, the public in Hong Kong (except if permitted to do so under the securities laws of Hong Kong) other than with respect to shares which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” in Hong Kong as defined in the Securities and Futures Ordinance and any rules made thereunder.

Singapore

This prospectus has not been registered as a prospectus with the Monetary Authority of Singapore. Accordingly, this prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the shares may not be circulated or distributed, nor may the shares be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to persons in Singapore other than (i) to an institutional investor (as defined under Section 4A of the Securities and Futures Act, Chapter 289 of Singapore (the “SFA”)) under Section 274 of the SFA, (ii) to a relevant person (as defined in Section 275(2) of the SFA) pursuant to Section 275(1) of the SFA, or any person pursuant to Section 275(1A) of the SFA, and in accordance with the conditions specified in Section 275 of the SFA or (iii) otherwise pursuant to, and in accordance with the conditions of, any other applicable provision of the SFA, in each case subject to conditions set forth in the SFA.

Where the shares are subscribed or purchased under Section 275 of the SFA by a relevant person which is a corporation (which is not an accredited investor (as defined in Section 4A of the SFA)) the sole business of which is to hold investments and the entire share capital of which is owned by one or more individuals, each of whom is an accredited investor, the securities (as defined in Section 239(1) of the SFA) of that corporation shall not be transferable for 6 months after that corporation has acquired the shares under Section 275 of the SFA except: (1) to an institutional investor under Section 274 of the SFA or to a relevant person (as defined in Section 275(2) of the SFA), (2) where such transfer arises from an offer in that corporation’s securities pursuant to Section 275(1A) of the SFA, (3) where no consideration is or will be given for the transfer, (4) where the transfer is by operation of law, (5) as specified in Section 276(7) of the SFA, or (6) as specified in Regulation 32 of the Securities and Futures (Offers of Investments) (Shares and Debentures) Regulations 2005 of Singapore (“Regulation 32”)

Where the shares are subscribed or purchased under Section 275 of the SFA by a relevant person which is a trust (where the trustee is not an accredited investor (as defined in Section 4A of the SFA)) whose sole purpose is to hold investments and each beneficiary of the trust is an accredited investor, the beneficiaries’ rights and interest (howsoever described) in that trust shall not be transferable for 6 months after that trust has acquired the shares under Section 275 of the SFA except: (1) to an institutional investor under Section 274 of the SFA or to a relevant person (as defined in Section 275(2) of the SFA), (2) where such transfer arises from an offer that is made on terms that such rights or interest are acquired at a consideration of not less than S$200,000 (or its equivalent in a foreign currency) for each transaction

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(whether such amount is to be paid for in cash or by exchange of securities or other assets), (3) where no consideration is or will be given for the transfer, (4) where the transfer is by operation of law, (5) as specified in Section 276(7) of the SFA, or (6) as specified in Regulation 32.

Japan

The securities have not been and will not be registered under the Financial Instruments and Exchange Act of Japan (Act No. 25 of 1948, as amended), or the FIEA. The securities may not be offered or sold, directly or indirectly, in Japan or to or for the benefit of any resident of Japan (including any person resident in Japan or any corporation or other entity organized under the laws of Japan) or to others for reoffering or resale, directly or indirectly, in Japan or to or for the benefit of any resident of Japan, except pursuant to an exemption from the registration requirements of the FIEA and otherwise in compliance with any relevant laws and regulations of Japan.

LEGAL MATTERS

The validity of the shares of common stock offered by this prospectus will be passed upon for us by Latham & Watkins LLP, Houston, Texas. Certain legal matters in connection with this offering will be passed upon for the underwriters by Vinson & Elkins L.L.P., Houston, Texas.

EXPERTS

The consolidated financial statements as of and for the years ended December 31, 2016 and 2015 included in this prospectus have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report appearing herein. Such consolidated financial statements have been so included in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

WHERE YOU CAN FIND ADDITIONAL INFORMATION

We have filed with the SEC a registration statement on Form S‑1 relating to the shares of common stock offered by this prospectus. This prospectus, which constitutes a part of the registration statement, does not contain all of the information set forth in the registration statement. For further information regarding us and the shares of common stock offered by this prospectus, we refer you to the full registration statement, including its exhibits and schedules, filed under the Securities Act. The registration statement, of which this prospectus constitutes a part, including its exhibits and schedules, may be inspected and copied at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. Copies of the materials may also be obtained from the SEC at prescribed rates by writing to the Public Reference Room. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1‑800‑SEC‑0330.

The SEC maintains a website at http://www.sec.gov that contains reports, information statements and other information regarding issuers that file electronically with the SEC. Our registration statement, of which this prospectus constitutes a part, can be downloaded from the SEC’s website. These reports and other information may be inspected and copied at the Public Reference Room maintained by the SEC or obtained from the SEC’s website as provided above. Our website is located at http://www.propetroservices.com. We make our periodic reports and other information filed with or furnished to the SEC available, free of charge, through our website, as soon as reasonably practicable after those reports and other information are electronically filed with or furnished to the SEC. Information on our website or any other website is not incorporated by reference into this prospectus and does not constitute a part of this prospectus.

We intend to furnish or make available to our shareholders annual reports containing our audited financial statements prepared in accordance with GAAP. We also intend to furnish or make available to our

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shareholders quarterly reports containing our unaudited interim financial information, including the information required by Form 10‑Q, for the first three fiscal quarters of each fiscal year.

FORWARD‑LOOKING STATEMENTS

This prospectus contains forward‑looking statements. Statements that are predictive in nature, that depend upon or refer to future events or conditions or that include the words “may,” “could,” “plan,” “project,” “budget,” “predict,” “pursue,” “target,” “seek,” “objective,” “believe,” “expect,” “anticipate,” “intend,” “estimate,” and other expressions that are predictions of or indicate future events and trends and that do not relate to historical matters identify forward‑looking statements. Our forward‑looking statements include statements about our business strategy, our industry, our future profitability, our expected capital expenditures and the impact of such expenditures on our performance and our capital programs.

A forward‑looking statement may include a statement of the assumptions or bases underlying the forward‑looking statement. We believe that we have chosen these assumptions or bases in good faith and that they are reasonable. You are cautioned not to place undue reliance on any forward‑looking statements. You should also understand that it is not possible to predict or identify all such factors and should not consider the following list to be a complete statement of all potential risks and uncertainties. Factors that could cause our actual results to differ materially from the results contemplated by such forward‑looking statements include:

• the level of production of crude oil, natural gas and other hydrocarbons and the resultant market prices of crude oil, natural gas, natural gas liquids and other hydrocarbons;

• changes in general economic and geopolitical conditions;

• competitive conditions in our industry;

• changes in the long‑term supply of and demand for oil and natural gas;

• actions taken by our customers, suppliers, competitors and third‑party operators;

• changes in the availability and cost of capital;

• our ability to successfully implement our business plan;

• large or multiple customer defaults, including defaults resulting from actual or potential insolvencies;

• the price and availability of debt and equity financing (including changes in interest rates);

• our ability to complete growth projects on time and on budget;

• changes in our tax status;

• technological changes;

• operating hazards, natural disasters, weather‑related delays, casualty losses and other matters beyond our control;

• the effects of existing and future laws and governmental regulations (or the interpretation thereof);

• the effects of future litigation; and

• other factors discussed in this prospectus.

You should not place undue reliance on our forward‑looking statements. Although forward‑looking statements reflect our good faith beliefs at the time they are made, forward‑looking statements involve known and unknown risks, uncertainties and other factors, including the factors described under “Risk Factors,” which may cause our actual results, performance or achievements to differ materially from

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anticipated future results, performance or achievements expressed or implied by such forward‑looking statements. We undertake no obligation to publicly update or revise any forward‑looking statement, whether as a result of new information, future events, changed circumstances or otherwise, unless required by law. These cautionary statements qualify all forward‑looking statements attributable to us or persons acting on our behalf.

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GLOSSARY OF OIL AND NATURAL GAS TERMS

Acidizing. The pumping of acid into the wellbore to remove near‑well formation damage and other damaging substances. This procedure commonly enhances production by increasing the effective well radius. When performed at pressures above the pressure required to fracture the formation, the procedure is often referred to as acid fracturing.

Air drilling. A drilling technique whereby gases (typically compressed air or nitrogen) are used to cool the drill bit and lift cuttings out of the wellbore, instead of the more conventional use of liquids. The advantages of air drilling are that it is usually much faster than drilling with liquids and it may eliminate lost circulation problems. The disadvantages are the inability to control the influx of formation fluid into the wellbore and the destabilization of the borehole wall in the absence of the wellbore pressure typically provided by liquids.

Blowout. An uncontrolled flow of reservoir fluids into the wellbore, and sometimes catastrophically to the surface. A blowout may consist of salt water, oil, natural gas or a mixture of these. Blowouts can occur in all types of exploration and production operations, not just during drilling operations. If reservoir fluids flow into another formation and do not flow to the surface, the result is called an underground blowout. If the well experiencing a blowout has significant open‑hole intervals, it is possible that the well will bridge over (or seal itself with rock fragments from collapsing formations) down‑hole and intervention efforts will be averted.

Cementing. To use pressure pumping equipment to deliver a slurry of liquid cement that is pumped down a well between the casing and the borehole. Cementing provides isolation between fluid zones behind the casing to minimize potential damage to hydrocarbon bearing formations or the freshwater aquifers, and provides structural integrity for the casing by securing it to the earth.

Coiled tubing. A long, continuous length of pipe wound on a spool. The pipe is straightened prior to pushing into a wellbore and rewound to coil the pipe back onto the transport and storage spool. Depending on the pipe diameter (1 in. to 4¹/₂ in.) and the spool size, coiled tubing can range from 2,000 ft. to 15,000 ft. (610 m to 4,570 m) or greater length.

Completion. A generic term used to describe the assembly of down‑hole tubulars and equipment required to enable safe and efficient production from an oil or gas well. The point at which the completion process begins may depend on the type and design of the well.

Downhole. Pertaining to or in the wellbore (as opposed to being on the surface).

Downhole motor. A drilling motor located in the drill string above the drilling bit powered by the flow of drilling mud. Down‑hole motors are used to increase the speed and efficiency of the drill bit or can be used to steer the bit in directional drilling operations. Drilling motors have become very popular because of horizontal and directional drilling applications and the increase of day rates for drilling rigs.

Drilling rig. The machine used to drill a wellbore.

Flowback. The process of allowing fluids to flow from the well following a treatment, either in preparation for a subsequent phase of treatment or in preparation for cleanup and returning the well to production.

Frac sand. A proppant used in the completion and re‑completion of unconventional oil and natural gas wells to stimulate and maintain oil and natural gas production through the process of hydraulic fracturing.

Frac stage. A specified portion of the section of the wellbore that is being stimulated through hydraulic fracturing techniques. The average number of frac stages per horizontal well has increased

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dramatically as hydraulic fracturing has become standard industry practice and as the lateral lengths of horizontal wells has increased.

Horizontal drilling. A subset of the more general term “directional drilling,” used where the departure of the wellbore from vertical exceeds about 80 degrees. Note that some horizontal wells are designed such that after reaching true 90‑degree horizontal, the wellbore may actually start drilling upward. In such cases, the angle past 90 degrees is continued, as in 95 degrees, rather than reporting it as deviation from vertical, which would then be 85 degrees. Because a horizontal well typically penetrates a greater length of the reservoir, it can offer significant production improvement over a vertical well.

Hydraulic fracturing. A stimulation treatment routinely performed on oil and gas wells in low permeability reservoirs. Specially engineered fluids are pumped at high pressure and rate into the reservoir interval to be treated, causing a vertical fracture to open. The wings of the fracture extend away from the wellbore in opposing directions according to the natural stresses within the formation. Proppant, such as grains of sand of a particular size, is mixed with the treatment fluid to keep the fracture open when the treatment is complete. Hydraulic fracturing creates high‑conductivity communication with a large area of formation and bypasses any damage that may exist in the near‑wellbore area.

Hydrocarbon. A naturally occurring organic compound comprising hydrogen and carbon. Hydrocarbons can be as simple as methane, but many are highly complex molecules, and can occur as gases, liquids or solids. Petroleum is a complex mixture of hydrocarbons. The most common hydrocarbons are natural gas, oil and coal.

Natural gas liquids. Components of natural gas that are liquid at surface in field facilities or in gas‑processing plants. Natural gas liquids can be classified according to their vapor pressures as low (condensate), intermediate (natural gasoline) and high (liquefied petroleum gas) vapor pressure.

Plugging. The process of permanently closing oil and gas wells no longer capable of producing in economic quantities. Plugging work can be performed with a well servicing rig along with wireline and cementing equipment; however, this service is typically provided by companies that specialize in plugging work.

Pressure pumping. Services that include the pumping of liquids under pressure.

Producing formation. An underground rock formation from which oil, natural gas or water is produced. Any porous rock will contain fluids of some sort, and all rocks at considerable distance below the Earth’s surface will initially be under pressure, often related to the hydrostatic column of ground waters above the reservoir. To produce, rocks must also have permeability, or the capacity to permit fluids to flow through them.

Proppant. Sized particles mixed with fracturing fluid to hold fractures open after a hydraulic fracturing treatment. In addition to naturally occurring sand grains, man‑made or specially engineered proppants, such as resin‑coated sand or high‑strength ceramic materials like sintered bauxite, may also be used. Proppant materials are carefully sorted for size and sphericity to provide an efficient conduit for production of fluid from the reservoir to the wellbore.

Shale. A fine‑grained, fissile, sedimentary rock formed by consolidation of clay‑ and silt‑sized particles into thin, relatively impermeable layers.

Stimulation. A treatment performed to restore or enhance the productivity of a well. Stimulation treatments fall into two main groups, hydraulic fracturing treatments and matrix treatments. Fracturing treatments are performed above the fracture pressure of the reservoir formation and create a highly conductive flow path between the reservoir and the wellbore. Matrix treatments are performed below the reservoir fracture pressure and generally are designed to restore the natural permeability of the reservoir

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following damage to the near‑wellbore area. Stimulation in shale gas reservoirs typically takes the form of hydraulic fracturing treatments.

Unconventional resource. An umbrella term for oil and natural gas that is produced by means that do not meet the criteria for conventional production. What has qualified as “unconventional” at any particular time is a complex function of resource characteristics, the available exploration and production technologies, the economic environment, and the scale, frequency and duration of production from the resource. Perceptions of these factors inevitably change over time and often differ among users of the term. At present, the term is used in reference to oil and gas resources whose porosity, permeability, fluid trapping mechanism, or other characteristics differ from conventional sandstone and carbonate reservoirs. Coalbed methane, gas hydrates, shale gas, fractured reservoirs and tight gas sands are considered unconventional resources.

Utilization. The percentage of our fleet in use by our customers at the applicable time or for the applicable period of determination.

Wellbore. The physical conduit from surface into the hydrocarbon reservoir.

Workover. The process of performing major maintenance or remedial treatments on an oil or gas well. In many cases, workover implies the removal and replacement of the production tubing string after the well has been killed and a workover rig has been placed on location. Through‑tubing workover operations, using coiled tubing, snubbing or slickline equipment, are routinely conducted to complete treatments or well service activities that avoid a full workover where the tubing is removed. This operation saves considerable time and expense.

Zipperfrac. A hydraulic fracturing process where hydraulic fracturing operations are carried out concurrently at two or more parallel horizontal wellbores. In this process, one well holds frac pressure, while the adjacent well is stimulated through hydraulic fracturing. Hydraulic fracturing is alternated between each well, so the fracturing stages are placed opposite each other, resembling the teeth of a zipper.

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INDEX TO FINANCIAL STATEMENTS

ProPetro Holding Corp.

Historical Condensed Consolidated Financial Statements

Financial Statements (Unaudited)
Condensed Consolidated Balance Sheets as of September 30, 2017 and December 31, 2016	F-2
Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2017 and 2016	F-3
Condensed Consolidated Statement of Changes in Shareholders’ Equity for the nine months ended September 30, 2017	F-4
Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2017 and 2016	F-5
Notes to Condensed Consolidated Financial Statements	F-6

Historical Consolidated Financial Statements

Audited Consolidated Financial Statements for the Years Ended December 31, 2016 and 2015:
Report of Independent Registered Public Accounting Firm	F-20
Consolidated Balance Sheets	F-21
Consolidated Statements of Operations	F-22
Consolidated Statements of Changes in Shareholders’ Equity	F-23
Consolidated Statements of Cash Flows	F-24
Notes to Consolidated Financial Statements	F-25

F-1

PROPETRO HOLDING CORP. AND SUBSIDIARY

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share data)

(Unaudited)

	September 30, 2017			December 31, 2016
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	51,008		$	133,596
Accounts receivable - net of allowance for doubtful accounts of $335 and $552, respectively	160,047			115,179
Inventories	9,148			4,713
Prepaid expenses	5,543			4,608
Other current assets	975			6,684
Total current assets	226,721			264,780
PROPERTY AND EQUIPMENT - Net of accumulated depreciation	399,268			263,862
OTHER NONCURRENT ASSETS:
Goodwill	9,425			9,425
Intangible assets - net of amortization	373			589
Deferred revenue rebate - net of amortization	1,077			2,462
Other noncurrent assets	1,727			304
Total other noncurrent assets	12,602			12,780
TOTAL ASSETS	$	638,591		$	541,422
LIABILITIES AND SHAREHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable	$	181,660		$	129,093
Accrued liabilities	11,074			13,619
Current portion of long-term debt	7,441			16,920
Accrued interest payable	86			109
Total current liabilities	200,261			159,741
DEFERRED INCOME TAXES	1,315			1,148
LONG-TERM DEBT	34,476			159,407
OTHER LONG-TERM LIABILITIES	124			117
Total liabilities	236,176			320,413
COMMITMENTS AND CONTINGENCIES (Note 9)
SHAREHOLDERS’ EQUITY:
Preferred stock, $0.001 par value, 30,000,000 shares authorized, 0 and 16,999,990 shares issued, respectively	—			17
Preferred stock, additional paid-in capital	—			162,494
Common stock, $0.001 par value, 200,000,000 shares authorized, 83,039,854 and 52,627,652 shares issued, respectively	83			53
Additional paid-in capital	606,707			265,355
Accumulated deficit	(204,375		)	(206,910		)
Total shareholders’ equity	402,415			221,009
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$	638,591		$	541,422

See accompanying notes to condensed consolidated financial statements

F-2

PROPETRO HOLDING CORP. AND SUBSIDIARY

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

(Unaudited)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
REVENUE - Service revenue	$	282,730		$	116,904		$	668,153		$	272,999
COSTS AND EXPENSES
Cost of services (exclusive of depreciation and amortization)	225,433			110,223			551,775			255,362
General and administrative (inclusive of stock-based compensation)	11,106			5,856			38,881			17,197
Depreciation and amortization	14,745			10,790			38,602			32,669
Loss on disposal of assets	8,742			5,923			28,971			12,859
Total costs and expenses	260,026			132,792			658,229			318,087
OPERATING INCOME (LOSS)	22,704			(15,888		)	9,924			(45,088		)
OTHER INCOME (EXPENSE):
Interest expense	(644		)	(4,550		)	(6,469		)	(15,942		)
Gain on extinguishment of debt	—			—			—			6,975
Other expense	(191		)	(106		)	(792		)	(419		)
Total other income (expense)	(835		)	(4,656		)	(7,261		)	(9,386		)
INCOME (LOSS) BEFORE INCOME TAXES	21,869			(20,544		)	2,663			(54,474		)
INCOME TAX (EXPENSE)/BENEFIT	96			6,946			(128		)	18,644
NET INCOME (LOSS)	$	21,965		$	(13,598	)	$	2,535		$	(35,830	)
NET INCOME (LOSS) PER COMMON SHARE:
Basic	$	0.26		$	(0.26	)	$	0.03		$	(0.84	)
Diluted	$	0.25		$	(0.26	)	$	0.03		$	(0.84	)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic	83,040			52,975			74,124			42,526
Diluted	86,264			52,975			77,118			42,526

See accompanying notes to condensed consolidated financial statements

F-3

PROPETRO HOLDING CORP. AND SUBSIDIARY

CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS’ EQUITY

(In thousands)

(Unaudited)

	Preferred Stock								Common Stock
	Shares		Amount			Preferred Additional Paid-In Capital			Shares	Amount		Additional Paid-In Capital		Accumulated Deficit			Total
BALANCE - January 1, 2017	17,000		$	17		$	162,494		52,628	$	53	$	265,355	$	(206,910	)	$	221,009
Stock-based compensation cost	—		—			—			—	—		8,730		—			8,730
Initial Public Offering net of costs	—		—			—			13,250	13		170,128		—			170,141
Conversion of preferred stock to common at Initial Public Offering	(17,000	)	(17		)	(162,494		)	17,000	17		162,494		—			—
Exercise of stock options—net	—		—			—			162	—		—		—			—
Net income	—		—			—			—	—		—		2,535			2,535
BALANCE - September 30, 2017	—		$	—		$	—		83,040	$	83	$	606,707	$	(204,375	)	$	402,415

See accompanying notes to condensed consolidated financial statements

F-4

PROPETRO HOLDING CORP. AND SUBSIDIARY

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Nine Months Ended September 30,
	2017			2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$	2,535		$	(35,830	)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	38,602			32,669
Gain on extinguishment	—			(6,975		)
Deferred income tax expense (benefit)	166			(18,644		)
Amortization of deferred revenue rebate	1,385			1,385
Amortization of deferred debt issuance costs	3,322			1,806
Stock-based compensation	8,730			1,130
Loss on disposal of assets	28,971			12,859
Gain on interest rate swap	(226		)	(54		)
Changes in operating assets and liabilities:
Accounts receivable	(44,868		)	3,255
Other current assets	3,271			(4		)
Inventories	(4,435		)	1,579
Prepaid expenses	(910		)	2,845
Accounts payable	41,564			(2,294		)
Accrued liabilities	589			620
Accrued interest	(23		)	1
Net cash provided by (used in) operating activities	78,673			(5,652		)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(193,820		)	(18,631		)
Proceeds from sale of assets	4,237			475
Net cash used in investing activities	(189,583		)	(18,156		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings	27,112			—
Repayments of borrowings	(164,638		)	(42,166		)
Repayments of insurance financing	(2,900		)	(2,833		)
Debt extinguishment cost	—			(525		)
Payment of debt issuance costs	(1,653		)	(115		)
Equity capitalization	—			40,425
Proceeds from IPO	185,500			—
Payment of IPO costs	(15,099		)	—
Net cash provided by (used in) financing activities	28,322			(5,214		)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(82,588		)	(29,022		)
CASH AND CASH EQUIVALENTS - Beginning of period	133,596			34,310
CASH AND CASH EQUIVALENTS - End of period	$	51,008		$	5,288

See accompanying notes to condensed consolidated financial statements

F-5

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 1 - Basis of Presentation

The accompanying condensed consolidated financial statements of ProPetro Holding Corp. and its subsidiary (the "Company," "we," "us" or "our") have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission ("SEC") for interim financial information and do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America ("GAAP") for annual financial statements. Those adjustments (which consisted of normal recurring accruals) that are, in the opinion of management, necessary for a fair presentation of the results of the interim periods have been made. Results of operations for such interim periods are not necessarily indicative of the results of operations for a full year due to changes in market conditions and other factors. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2016 included in the final prospectus of the Company filed with the SEC pursuant to rule 424(b) under the Securities Act of 1933 on March 20, 2017 ("Prospectus").

Initial Public Offering

On March 22, 2017, we consummated our initial public offering ("IPO"), in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold by the Company and 11,750,000 shares sold by existing stockholders. We received net proceeds of approximately $170.1 million after deducting $10.9 million of underwriting discounts and commissions, and $4.5 million of other offering expenses. Upon closing of the IPO, we used the proceeds (i) to repay $71.8 million in outstanding borrowings under our Term Loan (as defined in Note 4), (ii) to fund the purchase of additional hydraulic fracturing fleets and ancillary equipment, and (iii) for general corporate purposes.

In connection with the IPO, the Company executed a stock split, such that each holder of common stock of the Company received 1.45 shares of common stock for every one share of previous common stock. Accordingly, any information related to, or dependent upon, the share or option counts in our comparative 2016 condensed consolidated financial statements (Unaudited) and Note 6, Net Income (Loss) per Share, Note 7, Stock-BasedCompensation, and Note 10, Equity Capitalization, have been updated to reflect the effect of the stock split.

Note 2 - Recently Issued Accounting Standards

In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014-09 requires entities to recognize revenue to depict transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU No. 2014-09 requires entities to disclose both qualitative and quantitative information that enables users of the consolidated financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, including disclosure of significant judgments affecting the recognition of revenue. ASU No. 2014-09 was originally effective for annual periods beginning after December 15, 2016, using either the retrospective or cumulative effect transition method. On August 12, 2015, the FASB issued ASU No. 2015-14, which defers the effective date of the revenue standard, ASU No. 2014-09, by one year for all entities and permits early adoption on a limited basis. We have completed our preliminary evaluation of ASU No. 2014-09, and the adoption of this guidance will not materially affect our revenue recognition. However, there will be additional disclosures on our consolidated financial statements relating to the adoption of this standard.

In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory, which requires entities to measure most inventory "at the lower of cost and net realizable value," thereby simplifying the current guidance under which an entity must measure inventory at the lower of cost or

F-6

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 2 - Recently Issued Accounting Standards (Continued)

market. ASU No. 2015-11 does not apply to inventories that are measured by using either the last-in, first-out method or the retail inventory method. The amendments in ASU No. 2015-11 are effective for fiscal years beginning after December 15, 2016. The ASU became effective for us in 2017 and the adoption of this guidance did not materially affect our consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, Leases, a new standard on accounting for leases. The ASU introduces a lessee model that brings most leases on the balance sheet. The new standard also aligns many of the underlying principles of the new lessor model with those in the current accounting guidance as well as the FASB’s new revenue recognition standard. However, the ASU eliminates the use of bright-line tests in determining lease classification as required in the current guidance. The ASU also requires additional qualitative disclosures along with specific quantitative disclosures to better enable users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The new standard is effective for annual reporting periods beginning after December 15, 2018, including periods within that reporting period, using a modified retrospective approach. Early adoption is permitted. We have not completed an evaluation of the impact the pronouncement will have on our consolidated financial statements and related disclosures.

In March 2016, the FASB issued ASU No. 2016-09, Compensation- Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, which modifies several aspects of the accounting for share-based payment transactions including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The new standard is effective for fiscal years and interim periods beginning after December 15, 2016, with early adoption permitted. The ASU became effective for us in 2017 and the adoption of this guidance did not materially affect our consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment, which removes the requirement to compare the implied fair value of goodwill with its carrying amount as part of step two of the goodwill impairment test. As a result, under this ASU, an entity would recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. This pronouncement is effective for impairment tests in fiscal years beginning after December 15, 2019, on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We believe that the adoption of this guidance will not materially affect our consolidated financial statements.

Note 3 - Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the "exit price") in an orderly transaction between market participants at the measurement date.

In determining fair value, the Company uses various valuation approaches and establishes a hierarchy for inputs used in measuring fair value that maximizes the use of relevant observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used, when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company's assumptions about the assumptions other market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on the observability of inputs as follows:

Level 1 — Valuations based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Valuation adjustments and block discounts are not applied to

F-7

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 3 - Fair Value Measurement (Continued)

Level 1 instruments. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these instruments does not entail a significant degree of judgment.

Level 2 — Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.

Level 3 — Valuations based on inputs that are unobservable and significant to the overall fair value measurement.

A financial instrument's categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Our financial instruments include cash and cash equivalents, accounts receivable, accounts payable, and a derivative financial instrument. The estimated fair value of our financial instruments — cash and cash equivalents, accounts receivable and accounts payable at September 30, 2017 and December 31, 2016 approximates their carrying value as reflected in our condensed consolidated balance sheets due to their short-term nature. We use a derivative financial instrument, an interest rate swap, to manage interest rate risk. Our policies do not permit the use of derivative financial instruments for speculative purposes. We did not designate the interest rate swap as a hedge for accounting purposes. We record all derivatives as of the end of our reporting period in our condensed consolidated balance sheet at fair value, which is based on quoted market prices, a Level 1 input. We may be exposed to credit losses in the event of nonperformance by counterparties to the interest rate swap. The counterparty of the interest rate swap is a credible, large institution, and we do not believe there is significant or material credit risk upon settlement of the contract. The fair value of the interest rate swap liability at September 30, 2017 and December 31, 2016 was $0.03 million and $0.3 million, respectively. Based on quoted market prices as of September 30, 2017 and 2016, for contracts with similar terms and maturity date, as provided by the counterparty, we recorded a gain of $0.2 million and $0.1 million during the nine months ended September 30, 2017 and 2016, respectively.

Assets Measured at Fair Value on a Nonrecurring Basis

Assets measured at fair value on a nonrecurring basis at September 30, 2017 and December 31, 2016, respectively, are set forth below:

F-8

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 3 - Fair Value Measurement (Continued)

			Estimated fair value measurements
	Balance		Quoted prices in active market (Level 1)		Significant other observable inputs (Level 2)		Significant other unobservable inputs (Level 3)		Total gains (losses)
($ in thousands)
September 30, 2017:
Property and equipment, net	$	—	$	—	$	—	$	—	$	—
Goodwill	$	—	$	—	$	—	$	—	$	—
December 31, 2016:
Property and equipment, net	$	8,700	$	—	$	8,700	$	—	$	(6,305	)
Goodwill	$	9,425	$	—	$	—	$	9,425	$	(1,177	)

No impairment of property and equipment was recorded during the nine months ended September 30, 2017 and 2016. During the fourth quarter of 2016, the depressed cash flows and continued decline in utilization of our Permian drilling assets were indicative of potential impairment, resulting in the Company comparing the carrying value of the Permian drilling assets with its estimated fair value. We determined that the carrying value of the Permian drilling assets was greater than its estimated fair value, and as such, an impairment expense was recorded in the fourth quarter of 2016. The non-cash asset impairment charges recorded in the fourth quarter of 2016 for Permian drilling was $6.3 million, which had a then net carrying value of $15.0 million prior to the impairment write-down.

We generally apply fair value techniques to our reporting units on a nonrecurring basis associated with valuing potential impairment loss related to goodwill. Our estimate of the reporting unit fair value is based on a combination of income and market approaches, Level 1 and 3, respectively, in the fair value hierarchy. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value. Significant assumptions include projected revenue growth, capital expenditures, utilization, gross margins, discount rates, terminal growth rates, and weight allocation between income and market approaches. If the reporting unit's carrying amount exceeds its fair value, we consider goodwill impaired, and the impairment loss is calculated and recorded. There were no additions to, or disposal of, goodwill during the nine months ended September 30, 2017 and 2016. At December 31, 2016, we estimated the fair value of the surface drilling reporting unit to be $3.8 million and its carrying value was $4.2 million. As a result of the potential impairment due to the carrying value exceeding the estimated fair value, we then further determined the implied fair value of the $1.2 million goodwill for the surface drilling reporting unit to be $0. Accordingly, we recorded an impairment loss of $1.2 million during the fourth quarter of 2016.

Note 4 - Long-Term Debt

2013 Term Loan and Revolving Credit Facility

On September 30, 2013, we entered into a term loan in the amount of $220 million ("Term Loan") with a $40 million revolving credit line ("Revolving Credit Facility"). Borrowings under the Term Loan and Revolving Credit Facility accrued interest at LIBOR plus 6.25%, subject to a 1% LIBOR floor, and were secured by a first priority lien and security interest in all assets of the Company. Proceeds from the Term Loan were used to pay off 100% of our debt outstanding, including accrued interest, at September 30, 2013, with excess proceeds from the Term Loan and the Revolving Credit Facility used to fund growth and working capital needs. The Term Loan and Revolving Credit Facility were scheduled to mature on

F-9

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 4 - Long-Term Debt (Continued)

September 30, 2019 and September 30, 2018, respectively, with quarterly and monthly payments of principal and interest, respectively.

Under the Term Loan and Revolving Credit Facility we were required to comply, subject to certain exceptions and materiality qualifiers, with certain customary affirmative and negative covenants, including, but not limited to, covenants pertaining to reporting, insurance, collateral maintenance, change of control, transactions with affiliates, distributions, and limitations on additional indebtedness. In addition, the Term Loan and Revolving Credit Facility included a maximum leverage ratio of 3.5x EBITDA (earnings before interest, taxes, depreciation, and amortization) to total debt, which became effective March 31, 2014.

In 2015, given the then near-term economic uncertainty and volatility of commodity prices, we determined that we were likely to be out of compliance with the leverage ratio covenant under the Term Loan and Revolving Credit Facility at the March 31, 2016 test date. Accordingly, the Company and its equity sponsor, Energy Capital Partners ("ECP"), commenced negotiations with the lenders to amend the covenants and leverage ratio in the Term Loan and Revolving Credit Facility. The resulting amendment and waiver agreement was executed on June 8, 2016. Under the terms of the amendment, ECP infused $40 million of additional equity into the Company, $10 million of which was reserved for working capital, with up to $30 million available to repurchase debt. A minority shareholder also infused $0.425 million alongside ECP to prevent dilution. The amendment and waiver also suspended the leverage ratio test until June 30, 2017, and provided us with 30 days to deliver any past-due financial statements.

Gain on Extinguishment of Debt — in connection with the amendment to the Term Loan and Revolving Credit Facility, we initiated an auction process with the lenders to repurchase a portion of debt for a price of 80 cents, a 20% discount to par value. The auction settled on June 16, 2016 as the Company repurchased a total amount of $37.5 million of debt for $30 million plus $0.5 million in debt extinguishment auction costs, leading to a gain on extinguishment of debt of $7.0 million.

On January 13, 2017, we repaid $75 million of the outstanding balance under the Term Loan and repaid the remaining balance of $13.5 million under the Revolving Credit Facility using a portion of the proceeds from the private placement offering. On March 22, 2017, we retired the $71.8 million remaining balance of the Term Loan, along with accrued interest, using a portion of the proceeds from our IPO. Each of the Term Loan and Revolving Credit Facility were terminated in accordance with their terms upon the repayment of outstanding borrowings.

Equipment and Manufacturing Notes

On November 24, 2015, we entered into a 36-month financing arrangement for three hydraulic fracturing fleets in the amount of $25 million, and a portion of the proceeds were used to pay off the previous manufacturer notes, with the remainder being used for additional liquidity.

On June 30, 2017, we entered into a financing arrangement for the purchase of light vehicles. As of September 30, 2017, we purchased certain light vehicles under this financing arrangement in the amount of $2.1 million.

F-10

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 4 - Long-Term Debt (Continued)

ABL Credit Facility

On March 22, 2017, we entered into a new revolving credit facility with a $150 million borrowing capacity ("ABL Credit Facility"). Borrowings under the ABL Credit Facility accrue interest based on a three-tier pricing grid tied to availability, and we may elect for loans to be based on either LIBOR or base rate, plus the applicable margin, which ranges from 1.75% to 2.25% for LIBOR loans and 0.75% to 1.25% for base rate loans, with no LIBOR floor. Borrowings under the ABL Credit Facility are secured by a first priority lien and security interest in substantially all assets of the Company. The ABL Credit Facility has a tenor of 5 years and a borrowing base of 85% of eligible accounts receivable less customary reserves. Under this facility we are required to comply, subject to certain exceptions and materiality qualifiers, with certain customary affirmative and negative covenants, including, but not limited to, covenants pertaining to our ability to incur liens, indebtedness, changes in the nature of our business, mergers and other fundamental changes, disposal of assets, investments and restricted payments, amendments to our organizational documents or accounting policies, prepayments of certain debt, dividends, transactions with affiliates, and certain other activities. In addition, the ABL Credit Facility includes a Springing Fixed Charge Coverage Ratio of 1.0x when excess availability is less than the greater of (i) 10% of the lesser of the facility size and the Borrowing Base and (ii) $12 million. The ABL has a commitment fee of 0.375%, which reduces to 0.25% if utilization is greater than 50% of the borrowing base.

Total debt consisted of the following at September 30, 2017 and December 31, 2016, respectively:

($ in thousands)	2017		2016
ABL Credit Facility	$	25,000	$	—
6.25% "Term loan" due September 2019	—		146,750
Revolving Credit Facility	—		13,500
Equipment financing	16,917		19,193
Total debt	41,917		179,443
Less deferred loan costs, net of amortization	—		3,116
Subtotal	41,917		176,327
Less current portion of long-term debt	7,441		16,920
Total long-term debt, net of deferred loan costs	$	34,476	$	159,407

The loan origination costs relating to the ABL Credit Facility are classified as an asset in the balance sheet.

Annual Maturities — Scheduled remaining annual maturities of total debt are as follows at September 30, 2017:

($ in thousands)
2017	$	1,778
2018	14,298
2019	805
2020	36
2021 and thereafter	25,000
Total	$	41,917

F-11

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 5 - Reportable Segment Information

The Company has seven operating segments for which discreet financial information is readily available: hydraulic fracturing, cementing, acidizing, coil tubing, flowback, surface drilling, and Permian drilling. These segments represent how the Chief Operating Decision Maker (CODM) evaluates performance and allocates resources.

In accordance with Accounting Standards Codification (ASC) 280—Segment Reporting, the Company has one reportable segment (pressure pumping) comprised of the hydraulic fracturing, cementing, and acidizing operating segments. All other operating segments and corporate administrative expenses are included in the ‘‘all other’’category in the table below. Inter-segment revenues are not material and are not shown separately in the table below.

The Company manages and assesses the performance of the reportable segment by its adjusted EBITDA (earnings before other income (expense), interest, taxes, depreciation & amortization, stock-based compensation expense, impairment expense, (gain)/loss on disposal of assets, gain on extinguishment of debt and other unusual or nonrecurring expenses or income). A reconciliation from segment level financial information to the consolidated statement of operations is provided in the table below.

	Three months ended September 30, 2017							Nine months ended September 30, 2017
($ in thousands)	Pressure Pumping		All Other			Total		Pressure Pumping		All Other			Total
Service revenue	$	271,924	$	10,806		$	282,730	$	639,355	$	28,798		$	668,153
Adjusted EBITDA	$	50,013	$	(2,245	)	$	47,768	$	98,296	$	(3,641	)	$	94,655
Depreciation and amortization	$	13,637	$	1,108		$	14,745	$	35,228	$	3,374		$	38,602
Goodwill	$	9,425	$	—		$	9,425	$	9,425	$	—		$	9,425
Capital expenditures	$	61,752	$	765		$	62,517	$	203,097	$	3,231		$	206,328
Total assets	$	604,769	$	33,822		$	638,591	$	604,769	$	33,822		$	638,591
	Three months ended September 30, 2016							Nine months ended September 30, 2016
	Pressure Pumping		All Other			Total		Pressure Pumping		All Other			Total
Service revenue	$	109,697	$	7,207		$	116,904	$	251,410	$	21,589		$	272,999
Adjusted EBITDA	$	2,951	$	(1,616	)	$	1,335	$	6,500	$	(4,930	)	$	1,570
Depreciation and amortization	$	9,274	$	1,516		$	10,790	$	27,905	$	4,764		$	32,669
Goodwill	$	9,425	$	1,177		$	10,602	$	9,425	$	1,177		$	10,602
Capital expenditures	$	11,641	$	202		$	11,843	$	21,582	$	312		$	21,894
Total assets at December 31, 2016	$	501,906	$	39,516		$	541,422	$	501,906	$	39,516		$	541,422

F-12

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 5 - Reportable Segment Information (Continued)

Reconciliation of net income (loss) to adjusted EBITDA:

	Three months ended September 30, 2017									Nine months ended September 30, 2017
($ in thousands)	Pressure Pumping			All Other			Total			Pressure Pumping			All Other			Total
Net income (loss)	$	28,372		$	(6,407	)	$	21,965		$	30,087		$	(27,552	)	$	2,535
Depreciation and amortization	13,637			1,108			14,745			35,228			3,374			38,602
Interest expense	—			644			644			—			6,469			6,469
Income tax (benefit) expense	—			(96		)	(96		)	—			128			128
Loss on disposal of assets	7,552			1,190			8,742			27,943			1,028			28,971
Stock-based compensation	—			751			751			—			8,730			8,730
Other expense	—			191			191			—			792			792
Other general and administrative expense (1)	—			149			149			—			722			722
Deferred IPO bonus expense	452			225			677			5,038			2,668			7,706
Adjusted EBITDA	$	50,013		$	(2,245	)	$	47,768		$	98,296		$	(3,641	)	$	94,655
	Three months ended September 30, 2016									Nine months ended September 30, 2016
($ in thousands)	Pressure Pumping			All Other			Total			Pressure Pumping			All Other			Total
Net loss	$	(12,265	)	$	(1,333	)	$	(13,598	)	$	(34,815	)	$	(1,015	)	$	(35,830	)
Depreciation and amortization	9,274			1,516			10,790			27,905			4,764			32,669
Interest expense	—			4,550			4,550			—			15,942			15,942
Income tax benefit	—			(6,946		)	(6,946		)	—			(18,644		)	(18,644		)
(Gain)/loss on disposal of assets	5,942			(19		)	5,923			13,410			(551		)	12,859
Stock-based compensation	—			510			510			—			1,130			1,130
Gain on extinguishment of debt	—			—			—			—			(6,975		)	(6,975		)
Other expense	—			106			106			—			419			419
Adjusted EBITDA	$	2,951		$	(1,616	)	$	1,335		$	6,500		$	(4,930	)	$	1,570

____________________

(1) Other general and administrative expense relates to legal settlement expense.

Note 6 - Net Income (Loss) Per Share

Net income (loss) per share is determined by dividing the net income (loss) relevant to the common stockholders by the weighted average number of shares outstanding during the period. Diluted net income (loss) per common share uses the same net income (loss) divided by the number of shares that would be outstanding assuming dilutive options and stock are converted. The table below shows the calculations for the three and nine months ended September 30, 2017 and 2016.

F-13

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 6 - Net Income (Loss) Per Share (Continued)

	Three Months Ended September 30,					Nine Months Ended September 30,
(In thousands, except for per share data)	2017		2016			2017		2016
Numerator (both basic and diluted)
Net income (loss) relevant to common stockholders	$	21,965	$	(13,598	)	$	2,535	$	(35,830	)
Denominator
Denominator for basic income (loss) per share	83,040		52,975			74,124		42,526
Dilutive effect of stock options	2,808		—			2,822		—
Dilutive effect of performance stock units	37		—			—		—
Dilutive effect of non-vested restricted stock	379		—			172		—
Denominator for diluted income (loss) per share	86,264		52,975			77,118		42,526
Basic income (loss) per common share	$	0.26	$	(0.26	)	$	0.03	$	(0.84	)
Diluted income (loss) per common share	$	0.25	$	(0.26	)	$	0.03	$	(0.84	)

As shown in the table below, the following non-vested restricted stock, performance stock units, and stock options have not been included in the calculation of diluted income (loss) per share as they would be anti-dilutive to the calculation above.

	Three Months Ended September 30,		Nine Months Ended September 30,
(In thousands)	2017	2016	2017	2016
Stock options	789	4,646	789	4,646
Performance stock units	—	—	170	—
Non-vested restricted stock	—	372	318	372
	789	5,018	1,277	5,018

Note 7 - Stock-Based Compensation

Stock Options

Effective March 4, 2013, we adopted the ProPetro Stock Option Plan pursuant to which our Board of Directors may grant stock options or other stock-based awards to key employees, consultants, and directors. The Plan, as amended, is authorized to grant up to 4,645,884 shares of common stock to be issued upon exercise of the options. The Company’s share price used to estimate the fair value of the option at the grant date was based on a combination of income and market approaches, which are highly complex and sensitive. The income approach involves the use of a discounted cash flow method, with cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value of the Company’s stock. The expected term used to calculate the fair value of all options considers the vesting date and the grant’s expiration date. The expected volatility was estimated by considering comparable public companies, and the risk free rate is based on the U.S treasury yield curve as of the grant date. The dividend assumption is based on historical experience. After becoming a public company, the market price was used to determine the market value of our common stock. Prior to 2015, we had granted a total of 3,499,228 options with an exercise price of $3.96 per option, and all options expire 10 years from the date of grant.

On June 14, 2013, we granted 2,799,408 stock option awards to certain key employees and directors that shall vest and become exercisable based upon the achievement of a service requirement. The options vest in 25% increments for each year of continuous service and an option becomes fully vested

F-14

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 7 - Stock-Based Compensation (Continued)

upon the optionee’s completion of the fourth year of service. The contractual term for the options awarded is 10 years. For the nine months ended September 30, 2017 and 2016, we recognized $0.7 million and $0.9 million, respectively, in compensation expense related to these stock options. The fair value of each option award granted is estimated on the date of grant using the Black-Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.35		%

On December 1, 2013, we granted 699,820 stock option awards to certain key employees which were scheduled to vest in four substantially equal annual installments, subject to service and performance requirements and acceleration upon a change in control. As of September 30, 2016, the performance requirement was not considered to be probable of achievement for any of the outstanding option awards and 114,456 options were forfeited during the year ended December 31, 2016. Accordingly, we have not recognized any compensation expense related to these stock options as of September 30, 2016. Effective March 16, 2017, we terminated the options in connection with the IPO and approved a cash bonus totaling $5.1 million to the holders of the options.

The contractual term for the options awarded is 10 years. The fair value of each option award granted is estimated on the date of grant using the Black-Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.83		%

On July 19, 2016, we granted 1,274,549 stock option awards to certain key employees and directors which are scheduled to vest in five substantially equal semi-annual installments commencing in December 2016, subject to a continuing services requirement. The contractual term for the options awarded is 10 years. For the nine months ended September 30, 2017, we recognized the remaining $1.8 million in stock compensation expense related to these stock options, as the Company fully accelerated vesting of the options in connection with the IPO, and for the nine months ended September 30, 2016, we recognized $0.2 million in stock compensation expense related to these stock options.

The fair value of each option award granted is estimated on the date of grant using the Black- Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	55		%
Expected dividends	$	—
Expected term (in years)	5.8
Risk free rate	1.22		%

F-15

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 7 - Stock-Based Compensation (Continued)

In March 2017, our shareholders approved the ProPetro 2017 Incentive Award Plan ("IAP") pursuant to which our Board of Directors may grant stock options, restricted stock units ("RSUs"), performance stock units ("PSUs"), or other stock-based awards to key employees, consultants, directors and employees. The IAP authorizes up to 5,800,000 shares of common stock to be issued under awards granted pursuant to the plan. On March 16, 2017, we granted 793,738 stock option awards to certain key employees and directors pursuant to the IAP which are scheduled to vest in four substantially equal annual installments, subject to a continuing service requirement. The contractual term for the options awarded is 10 years. For the nine months ended September 30, 2017 and 2016, we recognized $0.4 million and $0, in stock compensation expense related to these stock option awards.

The fair value of each stock option award granted is estimated on the date of grant using the Black- Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	18		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	2.23		%

A summary of the stock option activity for the nine months ended September 30, 2017 and the year ended December 31, 2016, is presented below.

	Number of Shares		Weighted Average Exercise Price		Weighted Average Grant-Date Fair Value
Outstanding at January 1, 2016	3,485,791		$	3.96	$	1.77
Granted	1,274,549		$	2.25	$	1.77
Exercised	—		$	—	$	—
Forfeited	(114,456	)	$	3.96	$	1.77
Expired	—		$	—	$	—
Canceled	—		$	—	$	—
Outstanding at December 31, 2016	4,645,884		$	3.49	$	1.77
Exercisable at December 31, 2016	2,354,466		$	3.77	$	1.77
Outstanding at January 1, 2017	4,645,884		$	3.49	$	1.77
Granted	793,738		$	14.00	$	3.35
Exercised	(226,194	)	$	3.96	$	1.77
Forfeited	(5,148	)	$	14.00	$	3.35
Expired	—		$	—	$	—
Canceled	(571,927	)	$	3.96	$	1.77
Outstanding at September 30, 2017	4,636,353		$	5.20	$	2.04
Exercisable at September 30, 2017	3,847,763		$	3.39	$	1.77

F-16

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 7 - Stock-Based Compensation (Continued)

Restricted Stock Units (Non-Vested Stock) and Performance Stock Units

On September 30, 2013, our Board of Directors authorized and granted 372,335 restricted stock units (RSUs) to a key executive. Each RSU represents the right to receive one share of common stock of the Company at par value $0.001 per share. Under the terms of the award, the shares of common stock subject to the RSUs were to be paid to the grantee upon change in control, regardless of whether the grantee was affiliated with the Company on the settlement date. The fair value of the RSUs is measured as the price of the Company’s shares on the grant date, which was estimated to be $3.89. The share price used to estimate the fair value of the RSU at the grant date was based on a combination of income and market approaches, which are highly complex and sensitive. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value of the Company’s stock. Effective March 22, 2017, the Board of Directors canceled these RSUs and issued 372,335 new RSUs to the grantee. These issued RSUs are effectively identical to the RSUs granted in 2013, provided, however, that the RSUs will now be payable in full on March 22, 2018. The fair value of the RSUs issued on March 22, 2017, was based on the Company's stock market price at the grant date. In connection with the IPO, we fully recognized the stock compensation expense related to the re-issued RSUs.

On June 5, 2017, our Board of Directors granted 319,250 RSUs to employees, directors and executives pursuant to the IAP. Each RSU represents the right to receive one share of common stock. The fair value of the RSUs is based on the closing share price of our common stock on the date of grant. During the nine months ended September 30, 2017 and 2016, the recorded stock compensation expense for all RSUs was $5.8 million and $0, respectively.

The following table summarizes RSUs activity during the nine months ended September 30, 2017:

	Number of Shares		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2017	372,335		$	3.89
Granted	691,585		$	13.65
Vested	—		$	—
Exercised	—		$	—
Forfeited	(1,170	)	$	13.65
Expired	—		$	—
Canceled	(372,335	)	$	3.89
Outstanding at September 30, 2017	690,415		$	13.65

Effective June 5, 2017, our Board of Directors authorized and granted performance stock unit awards to certain key employees under the IAP. The actual number of shares that may be issued under the performance stock unit awards ranges from zero up to a maximum of twice the target number of performance stock unit awards granted to the participant, based on our total shareholder return relative to a designated peer group from the date of our IPO through December 31, 2019. Compensation expense is recorded ratably over the corresponding requisite service period. The fair value of performance stock unit awards is determined using a Monte Carlo probability model. Grant recipients do not have any shareholder rights until performance relative to the peer group has been determined following the completion of the performance period and shares have been issued. During the nine months ended

F-17

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 7 - Stock-Based Compensation (Continued)

September 30, 2017 and 2016 the recorded stock compensation expense for the performance stock units was $0.2 million and $0, respectively.

The following table summarizes information about the performance stock units that were outstanding at September 30, 2017:

Period Granted	Target Shares Outstanding at Beginning of Period	Target Shares Granted	Target Shares Vested	Target Shares Forfeited	Target Shares Outstanding at End of Period	Weighted Average Grant Date Fair Value per Share
2017	—	169,635	—	—	169,635	$	10.73
Total	—	169,635	—	—	169,635

The total stock compensation expense for the nine months ended September 30, 2017 and 2016 for all stock awards was $8.7 million and $1.1 million, respectively. The total unrecognized compensation expense as of September 30, 2017 is approximately $7.5 million, and is expected to be recognized over a weighted-average period of approximately 2.9 years.

Note 8 - Related-Party Transactions

The Company leases its corporate offices from a related party pursuant to a five-year lease agreement with a five-year extension option requiring a base rent of $0.07 million per year. The Company also leases five properties adjacent to the corporate office from related parties with annual base rents of $0.03 million, $0.03 million, $0.09 million, $0.09 million, and $0.18 million.

For the nine months ended September 30, 2017 and 2016, the Company paid approximately $0.21 million and $0.12 million, respectively, for the use of transportation services from a related party. The Company also rents equipment in Elk City, Oklahoma from a related party. For the the nine months ended September 30, 2017 and 2016, the Company paid $0.14 million and $0.14 million, respectively.

At September 30, 2017 and December 31, 2016, the Company had $0 million and $0 in payables, respectively, and approximately $0.04 million and $0.04 million in receivables, respectively, for related parties for services provided.

All agreements pertaining to real property and equipment were entered into during periods where the Company had limited liquidity and related parties secured them on behalf of the Company. All related party transactions are immaterial and have not been separately shown on the face of the financial statements.

For related party disclosure related to equity transactions with ECP, see Note 10.

Note 9 - Commitments and Contingencies

Operating Lease

We have various operating leases for office space and certain property and equipment. For the nine months ended September 30, 2017 and 2016, we recorded operating lease expense of $1.0 million and $1.0 million, respectively. Required remaining lease payments for each fiscal year are as follows:

F-18

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 9 - Commitments and Contingencies (Continued)

($ in thousands)
2017	$	116
2018	426
2019	366
2020	344
2021 and thereafter	774
Total	$	2,026

Contingent Liabilities

We may be subject to various legal actions, claims, and liabilities arising in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a materially adverse effect on our financial position, results of operations, or liquidity.

Note 10 - Equity Capitalization

Credit Amendment Equity Infusion

In connection with the Term Loan and Revolving Credit Facility amendment dated June 8, 2016 (see Note 4), ECP and its related affiliates along with other shareholders infused $40.425 million of equity into the Company and we issued 18,007,328 additional shares of common stock.

Convertible Preferred Stock

On December 27, 2016, we completed a private placement offering of $170.0 million, issuing 16,999,990 shares of Series A nonparticipating convertible preferred stock, par value $0.001 per share. Costs associated with the offering were approximately $7.0 million, resulting in net proceeds to the Company of approximately $163.0 million.

As of December 31, 2016, 16,999,990 shares of Series A convertible preferred stock were issued and outstanding, convertible into common stock at the conversion price per the private placement agreement. Upon the consummation of the IPO, the Series A Preferred stock automatically converted into common stock.

Initial Public Offering

On March 22, 2017, we consummated our IPO in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold by the Company and 11,750,000 shares sold by existing stockholders. We received net proceeds of approximately $170.1 million after deducting $10.9 million of underwriting discounts and commissions, and $4.5 million of other offering expenses. At closing, we used the proceeds (i) to repay $71.8 million in outstanding borrowings under the term loan, (ii) to fund the purchase of additional hydraulic fracturing fleets and ancillary equipment, and (iii) for general corporate purposes. In connection with the IPO, all 16,999,990 shares of our outstanding Series A Preferred Stock converted to common stock on a 1:1 basis.

Additionally, on March 28, 2017, one executive and one director net settled a total of 226,194 of their exercisable stock options and received 162,212 shares of common stock.

At September 30, 2017 and December 31, 2016, the Company had 83,039,854 and 52,627,652 shares outstanding, respectively.

F-19

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of

ProPetro Holding Corp. and Subsidiary

Midland, Texas

We have audited the accompanying consolidated balance sheets of ProPetro Holding Corp. and Subsidiary (the “Company”), as of December 31, 2016 and 2015, and the related consolidated statements of operations, changes in shareholders’ equity, and cash flows for each of the two years in the period ended December 31, 2016. These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the consolidated financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2016 and 2015, and the results of their operations and their cash flows for each of the two years in the period ended December 31, 2016, in conformity with accounting principles generally accepted in the United States of America.

/s/ DELOITTE & TOUCHE LLP

Houston, Texas

February 22, 2017 (August 11, 2017 as to the subsequent event disclosures regarding the Initial Public Offering and the conversion of preferred stock to common stock described in Note 1 and Note 18 and as to the effects of the stock split as described in Note 1)

F-20

PROPETRO HOLDING CORP. AND SUBSIDIARY
CONSOLIDATED BALANCE SHEETS
AS OF DECEMBER 31, 2016 AND 2015

	2016		2015
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	133,595,602	$	34,310,323
Accounts receivable — net of allowance for doubtful accounts of $551,909 and $845,681, respectively	115,178,992		90,290,905
Inventories	4,712,850		8,572,015
Prepaid expenses	4,608,862		4,488,180
Other current assets	6,683,739		803,828
Total current assets	264,780,045		138,465,251
PROPERTY AND EQUIPMENT — Net of accumulated depreciation	263,861,645		291,838,498
OTHER NONCURRENT ASSETS:
Goodwill	9,424,999		10,602,147
Intangible assets — net of amortization	589,039		877,027
Deferred revenue rebate — net of amortization	2,461,669		4,307,921
Other noncurrent assets	304,901		363,490
Total other noncurrent assets	12,780,608		16,150,585
TOTAL ASSETS	$	541,422,298	$	446,454,334
LIABILITIES AND SHAREHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable	$	129,092,821	$	87,365,143
Accrued liabilities	13,619,471		7,051,915
Current portion of long‑term debt	16,920,074		16,295,302
Accrued interest payable	108,337		76,794
Total current liabilities	159,740,703		110,789,154
DEFERRED INCOME TAXES	1,148,470		29,120,052
LONG‑TERM DEBT — Net of deferred loan costs	159,407,085		236,875,829
OTHER LONG‑TERM LIABILITIES	116,553		98,068
Total liabilities	320,412,811		376,883,103
COMMITMENTS AND CONTINGENCIES (Note 17)
SHAREHOLDERS’ EQUITY:
Preferred stock, $0.001 par value — 30,000,000 shares authorized and 16,999,990 and 0 shares issued and outstanding at 2016 and 2015, respectively	17,000		—
Preferred stock, additional paid‑in capital	162,494,174		—
Common stock, $0.001 par value — 200,000,000 shares authorized and 52,627,652 and 34,992,662 shares issued and outstanding at 2016 and 2015, respectively	52,628		34,993
Common stock, additional paid‑in capital	265,355,194		223,298,351
Accumulated deficit	(206,909,509)		(153,762,113)
Total shareholders’ equity	221,009,487		69,571,231
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$	541,422,298	$	446,454,334

See notes to consolidated financial statements.

F-21

PROPETRO HOLDING CORP. AND SUBSIDIARY
CONSOLIDATED STATEMENTS OF OPERATIONS
FOR THE YEARS ENDED DECEMBER 31, 2016 AND 2015

	2016			2015
REVENUE — Total service revenue	$	436,920,270		$	569,617,758
COSTS AND EXPENSES:
Cost of services (exclusive of depreciation and amortization)	404,140,241			483,337,584
General and administrative (inclusive of stock‑based compensation)	26,613,123			27,369,740
Depreciation and amortization	43,541,679			50,133,993
Property and equipment impairment expense	6,305,426			36,609,332
Goodwill impairment expense	1,177,148			—
Loss on disposal of assets	22,528,670			21,267,985
Total costs and expenses	504,306,287			618,718,634
OPERATING LOSS	(67,386,017		)	(49,100,876		)
OTHER INCOME (EXPENSE):
Interest expense	(20,386,695		)	(21,641,454		)
Gain on extinguishment of debt	6,974,805			—
Other expense	(321,071		)	(497,924		)
Total other expense	(13,732,961		)	(22,139,378		)
LOSS BEFORE INCOME TAXES	(81,118,978		)	(71,240,254		)
INCOME TAX BENEFIT	(27,971,582		)	(25,387,570		)
NET LOSS	$	(53,147,396	)	$	(45,852,684	)
NET LOSS PER COMMON SHARE:
Basic	$	(1.19	)	$	(1.31	)
Diluted	$	(1.19	)	$	(1.31	)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic	44,786,687			34,992,662
Diluted	44,786,687			34,992,662

See notes to consolidated financial statements.

F-22

PROPETRO HOLDING CORP. AND SUBSIDIARY
CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY
FOR THE YEARS ENDED DECEMBER 31, 2016 AND 2015

	Preferred Stock		Preferred Additional Paid‑In Capital		Common Stock		Common Additional Paid‑In Capital		Accumulated Deficit			Total
BALANCE — January 1, 2015	$	—	$	—	$	34,993	$	222,059,527	$	(107,909,429	)	$	114,185,091
Stock‑based compensation cost	—		—		—		1,238,824		—			1,238,824
Net loss	—		—		—		—		(45,852,684		)	(45,852,684		)
BALANCE — December 31, 2015	$	—	$	—	$	34,993	$	223,298,351	$	(153,762,113	)	$	69,571,231
BALANCE — January 1, 2016	$	—	$	—	$	34,993	$	223,298,351	$	(153,762,113	)	$	69,571,231
Stock‑based compensation cost	—		—		—		1,649,282		—			1,649,282
Additional common equity capitalization	—		—		17,635		40,407,561		—			40,425,196
Preferred equity capitalization, net of costs	17,000		162,494,174		—		—		—			162,511,174
Net loss	—		—		—		—		(53,147,396		)	(53,147,396		)
BALANCE — December 31, 2016	$	17,000	$	162,494,174	$	52,628	$	265,355,194	$	(206,909,509	)	$	221,009,487

See notes to consolidated financial statements.

F-23

PROPETRO HOLDING CORP. AND SUBSIDIARY
CONSOLIDATED STATEMENTS OF CASH FLOWS
FOR THE YEARS ENDED DECEMBER 31, 2016 AND 2015

	2016			2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$	(53,147,396	)	$	(45,852,684	)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	43,541,679			50,133,993
Gain on extinguishment of debt	(6,974,805		)	—
Property and equipment impairment expense	6,305,426			36,609,332
Goodwill impairment expense	1,177,148			—
Deferred income tax benefit	(27,971,582		)	(23,944,640		)
Amortization of deferred revenue rebate	1,846,251			1,846,251
Amortization of deferred debt issuance costs	2,090,874			1,351,202
Stock‑based compensation	1,649,282			1,238,824
Loss on disposal of assets	22,528,670			21,267,985
(Gain) loss on interest rate swap	(205,422		)	260,168
Changes in operating assets and liabilities:
Accounts receivable	(24,888,087		)	67,348,446
Other current assets	(562,897		)	8,666
Inventories	3,859,165			(622,494		)
Prepaid expenses	(62,093		)	2,081,537
Accounts payable	37,047,563			(23,889,408		)
Accrued liabilities	4,392,287			(6,294,956		)
Accrued interest	31,544			(311,500		)
Net cash provided by operating activities	10,657,607			81,230,722
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(42,831,884		)	(62,855,418		)
Proceeds from sale of assets	1,144,200			79,045
Net cash used in investing activities	(41,687,684		)	(62,776,373		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings	—			60,718,300
Repayments of borrowings	(41,295,302		)	(73,781,755		)
Proceeds from insurance financing	4,126,462			4,105,133
Repayments of insurance financing	(4,527,287		)	(6,257,342		)
Extinguishment of debt	(30,000,000		)	—
Payment of debt extinguishment costs	(525,196		)	—
Payment of debt issuance costs	(139,543		)	—
Proceeds from additional common equity capitalization	40,425,196			—
Proceeds from preferred equity capitalization	169,999,943			—
Payment of preferred equity capitalization costs	(7,488,768		)	—
Payment of deferred IPO costs	(260,149		)	—
Net cash provided by (used in) financing activities	130,315,356			(15,215,664		)
NET INCREASE IN CASH AND CASH EQUIVALENTS	99,285,279			3,238,685
CASH AND CASH EQUIVALENTS — Beginning of year	34,310,323			31,071,638
CASH AND CASH EQUIVALENTS — End of year	$	133,595,602		$	34,310,323

See notes to consolidated financial statements.

F-24

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

1. ORGANIZATION AND HISTORY

ProPetro Holding Corp. (“Holding”), a Texas corporation was formed on April 14, 2007, to serve as a holding company for its wholly owned subsidiary ProPetro Services, Inc. (“Services”), a Texas corporation. Services provide hydraulic fracturing, cementing, acidizing, coil tubing, Permian drilling, surface drilling and flowback services to oil and gas producers, located primarily in Texas, Oklahoma, New Mexico, Utah, Colorado, and Wyoming.

On March 4, 2013, a majority interest in the Company was purchased by Energy Capital Partners (“ECP”), an energy‑focused private equity firm (see Note 18).

On December 22, 2016, the Company restated and amended the Company’s Shareholders Agreement and certificate of formation in the state of Texas, approving a reverse stock split, such that each holder of common stock of the Company shall receive one share of common stock for every 170.4667 shares of previous common stock held. In conjunction, the Company amended the amount of authorized shares to 230,000,000, of which 200,000,000 are common and 30,000,000 are preferred.

On March 22, 2017, we completed our IPO in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold by the Company and 11,750,000 shares sold by existing stockholders. We received net proceeds of approximately $170.1 million after deducting $10.9 million of underwriting discounts and commissions, and $4.5 million of other offering expenses. At closing, we used the proceeds (i) to repay $71.8 million in outstanding borrowings under the term loan, (ii) to fund the purchase of additional hydraulic fracturing fleets and ancillary equipment, and (iii) for general corporate purposes. In connection with the IPO, the Company executed a stock split, such that each holder of common stock of the Company received 1.45 shares of common stock for every one share of previous common stock, and all 16,999,990 shares of our outstanding Series A Preferred Stock converted to common stock on a 1:1 basis.

Accordingly, any information related to or dependent upon the share or option counts in the 2016 and 2015 consolidated financial statements and Note 13 Net Loss per Share, Note 14 Stock‑Based Compensation, and Note 18 Equity Capitalization have been updated to reflect the effect of the reverse stock split in December 2016 and the stock split in March 2017.

Holding and Services are collectively referred to as the “Company” in the accompanying consolidated financial statements.

2. SIGNIFICANT ACCOUNTING POLICIES

A summary of the significant accounting policies consistently applied in the preparation of the accompanying consolidated financial statements are as follows:

Principles of Consolidation — The accompanying consolidated financial statements include the accounts of Holding and its wholly owned subsidiary, Services. All intercompany accounts and transactions have been eliminated in consolidation.

Basis of Presentation — The accompanying consolidated financial statements and related notes have been prepared pursuant to the rules and regulations of the Securities Exchange Commission (SEC) and in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”).

Use of Estimates — Management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and revenues and expenses during the reporting period. Such estimates include, but are not limited to, allowance for doubtful accounts, depreciation of property and

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PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

2. SIGNIFICANT ACCOUNTING POLICIES (Continued)

equipment, estimates of fair value of property and equipment, estimates related to fair value of reporting units for purposes of assessing goodwill, estimates related to deferred tax assets and liabilities, including any related valuation allowances, and estimates of fair value of stock‑based compensation. Actual results could differ from those estimates.

Revenue Recognition — The Company’s services are sold based upon contracts or other agreements with the customer that include fixed or determinable prices and do not include other post‑delivery obligations. Revenue for services is recognized as the services are rendered and when collectability is reasonably assured. Rates for services are typically determined per the contract or agreement with customers.

Pressure Pumping — Pressure pumping consists of downhole pumping services including hydraulic fracturing, acidizing and cementing. The Company recognizes revenues when services are performed, collection of the receivables is probable, and a price is fixed or determinable. The Company prices services for its pressure pumping by the job, project or day depending on the type of service performed and request from the customer.

Drilling Services — Drilling services consists of surface air drilling and Permian drilling, whereby we drill a well for a customer to a certain depth using a drilling rig and related equipment. The Company recognizes revenues either on a “turnkey” contract basis, in which a fixed and set price for the job is determinable, on a “daywork” contract basis, in which a stated rate per day is fixed and determinable, or on a “footage” contract basis, in which a rate per feet drilled is fixed and determinable.

Other Completion & Production Services — Other completion & production services consists of coil tubing and flowback services whereby the Company recognizes revenues when services are performed either on a per job or per day or hourly rate, collections of receivables are probable, and a price is fixed or determinable.

Cash and Cash Equivalents — The Company considers highly liquid investments with initial maturities of three months or less to be cash equivalents.

Accounts Receivable — Accounts receivables are stated at the amount billed and billable to customers. The Company’s allowance for doubtful accounts is based on management’s evaluations of the collectability of each accounts receivable based on the customer’s payment history and general economic conditions. At December 31, 2016 and 2015, the allowance for doubtful accounts was $0.6 million and $0.8 million, respectively.

Inventories — Inventories, which consists only of raw materials, are stated at lower of average cost or market.

Property and Equipment — The Company’s property and equipment are recorded at cost, less accumulated depreciation.

Upon sale or retirement of property and equipment, the cost and related accumulated depreciation are removed from the balance sheet and the net amount, less proceeds from disposal, is recognized as a gain or loss in the statement of operations.

The Company recorded a loss on disposal of assets of $22.5 million and $21.3 million for the years ended December 31, 2016 and 2015, respectively. The recorded loss on disposal is primarily attributed to the increased service intensity of pressure pumping activity which has resulted in a shorter useful life and faster replacement of certain components of the pressure pumping equipment.

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PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

2. SIGNIFICANT ACCOUNTING POLICIES (Continued)

Depreciation — Depreciation of property and equipment is provided on the straight‑line method over the following estimated useful lives:

Vehicles	1 ‑ 5 years
Equipment	2 ‑ 20 years
Leasehold improvements	5 ‑ 20 years

Impairment of Long‑Lived Assets — In accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 360, Accounting for the Impairment or Disposal of Long‑Lived Assets, the Company reviews its long‑lived assets to be held and used whenever events or circumstances indicate that the carrying value of those assets may not be recoverable.

An impairment loss is indicated if the sum of the expected future undiscounted cash flows attributable to the asset group is less than the carrying amount of such asset group. In this circumstance, the Company recognizes an impairment loss for the amount by which the carrying amount of the asset group exceeds the fair value of the asset group. The impairment recorded in 2015 was $36.6 million for property and equipment relating to the Permian drilling and acidizing asset groups. The impairment recorded in 2016 was $6.3 million for property and equipment relating to the Permian drilling asset group.

The Company accounts for long‑lived assets to be disposed of at the lower of their carrying amount or fair value, less cost to sell once management has committed to a plan to dispose of the assets.

Goodwill — Goodwill is the excess of the consideration transferred over the fair value of the tangible and identifiable intangible assets and liabilities recognized. Goodwill is not amortized. We perform an annual impairment test of goodwill as of December 31, or more frequently if circumstances indicate that impairment may exist. The determination of impairment is made by comparing the carrying amount of a reporting unit with its fair value, which is generally calculated using a combination of market and income approaches. If the fair value of the reporting unit exceeds the carrying value, no further testing is performed. If the fair value of the reporting unit is less than the carrying value, the implied fair value of reporting unit goodwill is calculated. The Company then compares the carrying value of goodwill to its implied fair value. In estimating the implied fair value of goodwill at the reporting unit, the Company assigns the fair value of the reporting unit to all of the assets and liabilities associated with the reporting unit as if the reporting unit had been acquired in a business combination. The excess of the fair value of the reporting unit over the amount assigned to the assets and liabilities of the reporting unit is the implied fair value of goodwill. If the carrying amount of goodwill exceeds the implied fair value of goodwill, an impairment loss is recognized for that difference.

In 2014, we acquired Blackrock Drilling, Inc. (“Blackrock”) for $1.8 million. The assets acquired from Blackrock were recorded as $0.6 million of equipment with the excess of the purchase price over the fair value of the assets recorded as goodwill of $1.2 million. The acquisition complemented our existing drilling operations. The transaction has been accounted for using the acquisition method of accounting and, accordingly, assets and liabilities assumed were recorded at their fair values as of the acquisition date. Based on our goodwill impairment test as of December 31, 2016, the Company concluded that there was an impairment of goodwill of $1.2 million related to the Blackrock acquisition. No impairment was recorded during the year ended December 31, 2015. Prior to the impairment write‑down in the current year, the goodwill related to the Blackrock acquisition of $1.2 million was recorded in the all other reportable segment.

In 2011, we acquired Technology Stimulation Services, LLC (“TSS”) for $24.4 million. The assets acquired from TSS were recorded as $15 million of equipment with the excess of the purchase price over fair value of the assets recorded as goodwill of $9.4 million. The acquisition complemented our existing

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PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

2. SIGNIFICANT ACCOUNTING POLICIES (Continued)

pressure pumping business. The transaction has been accounted for using the acquisition method of accounting and, accordingly, assets and liabilities assumed were recorded at their fair values as of the acquisition date. Based on our goodwill impairment tests as of December 31, 2016 and 2015, we concluded that the goodwill related to TSS acquisition was determined not to be impaired. The goodwill related to the TSS acquisition of $9.4 million is recorded in the pressure pumping reportable segment.

Intangible Assets — Intangible assets with finite useful lives are amortized on a basis that reflects the pattern in which the economic benefits of the intangible assets are realized, which is generally on a straight‑line basis over the asset’s estimated useful life.

Income Taxes — Income taxes are accounted for under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of differences between the consolidated financial statements and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.

We recognize deferred tax assets to the extent that we believe these assets are more likely than not to be realized. In making such a determination, we consider all positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, and the results of recent operations. If we determine that we would be able to realize our deferred tax assets in the future in excess of their net recorded amount, we would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes.

Advertising Expense — All advertising costs are expensed as incurred. For the years ended December 31, 2016 and 2015, advertising expense was $0.4 million and $0.9 million, respectively.

Deferred Loan Costs — The Company capitalized certain costs in connection with obtaining its borrowings, including lender, legal, and accounting fees. These costs are being amortized over the term of the related loan using the straight‑line method (which approximates the interest method). Deferred loan costs amortization is included in interest expense. Unamortized deferred loan costs associated with loans paid off or refinanced with different lenders are charged off in the period in which such an event occurs. Deferred loan costs are classified as a reduction of long‑term debt in the consolidated balance sheet. Amortization of deferred loan costs is recorded as interest expense in the statement of operations, and at December 31, 2016 and 2015, the amount of expense recorded was $2.1 million and $1.4 million, respectively.

Stock Based Compensation — The Company recognizes the cost of stock‑based awards on a straight‑line basis over the requisite service period of the award, which is usually the vesting period under the fair value method. Total compensation cost is measured on the grant date using fair value estimates.

Insurance Financing — The Company annually renews their commercial insurance policies and records a prepaid insurance asset and amortizes it monthly over the coverage period. The Company may choose to finance a portion of the premiums and will make repayments monthly over ten months in equal installments.

Going Concern — The Company annually evaluates its ability to continue as a going concern as required by Accounting Standards Update (ASU) No. 2014‑15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern and if necessary, provides disclosures if there is any substantial doubt about its ability to continue as a going concern.

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PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

2. SIGNIFICANT ACCOUNTING POLICIES (Continued)

Concentration of Credit Risk — The Company’s assets that are potentially subject to concentrations of credit risk are cash and cash equivalents and trade accounts receivable. Cash balances are maintained in financial institutions, which at times exceed federally insured limits. The Company monitors the financial condition of the financial institutions in which accounts are maintained and has not experienced any losses in such accounts. The receivables of the Company are spread over a number of customers, a majority of which are operators and suppliers to the oil and natural gas industries. The Company performs ongoing credit evaluations as to the financial condition of its customers with respect to trade receivables.

Recently Issued Accounting Standards — In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014‑09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014‑09 requires entities to recognize revenue to depict transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU No. 2014‑09 requires entities to disclose both qualitative and quantitative information that enables users of consolidated financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, including disclosure of significant judgments affecting the recognition of revenue. ASU No. 2014‑09 was originally effective for annual periods beginning after December 15, 2016, using either the retrospective or cumulative effect transition method. On August 12, 2015, the FASB issued ASU No. 2015‑14, which defers the effective date of the revenue standard, ASU No. 2014‑09, by one year for all entities and permits early adoption on a limited basis. The Company believes that the adoption of this guidance will not materially affect the Company’s revenue recognition. However, the Company will continue to evaluate and quantify the effect of the adoption of this guidance on its consolidated financial statements.

On July 22, 2015, the FASB issued ASU No. 2015‑11, Simplifying the Measurement of Inventory, which requires entities to measure most inventory “at the lower of cost and net realizable value,” thereby simplifying the current guidance under which an entity must measure inventory at the lower of cost or market. ASU No. 2015‑11 does not apply to inventories that are measured by using either the last‑in, first‑out method or the retail inventory method. The amendments in ASU No. 2015‑11 are effective for fiscal years beginning after December 15, 2016. The Company is currently evaluating the effect of the adoption of this guidance on the consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016‑02, Leases, a new standard on accounting for leases. The ASU introduces a lessee model that brings most leases on the balance sheet. The new standard also aligns many of the underlying principles of the new lessor model with those in the current accounting guidance as well as the FASB’s new revenue recognition standard. However, the ASU eliminates the use of bright‑line tests in determining lease classification as required in the current guidance. The ASU also requires additional qualitative disclosures along with specific quantitative disclosures to better enable users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The pronouncement is effective for annual reporting periods beginning after December 15, 2018, including periods within that reporting period, using a modified retrospective approach. Early adoption is permitted. The Company has not completed an evaluation of the impact the pronouncement will have on our consolidated financial statements and related disclosures.

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PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

3. SUPPLEMENTAL CASH FLOWS INFORMATION

	December 31, 2016		December 31, 2015
Supplemental cash flows disclosures
Interest paid	$	18,248,687	$	20,531,410
Income taxes paid	$	2,897	$	1,295,173
Supplemental disclosure of non‑cash activities
Capital expenditures included in accounts payable	$	3,176,356	$	8,821,227

4. FAIR VALUE MEASUREMENTS

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the “exit price”) in an orderly transaction between market participants at the measurement date.

In determining fair value, the Company uses various valuation approaches and establishes a hierarchy for inputs used in measuring fair value that maximizes the use of relevant observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used, when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the assumptions other market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on the observability of inputs as follows:

Level 1 — Valuations based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Valuation adjustments and block discounts are not applied to Level 1 instruments. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these instruments does not entail a significant degree of judgment.

Level 2 — Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.

Level 3 — Valuations based on inputs that are unobservable and significant to the overall fair value measurement.

A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Our financial instruments include cash and cash equivalents, accounts receivables, accounts payable, and a derivative financial instrument. The estimated fair value of our financial instruments — cash and cash equivalent, accounts receivable and accounts payable at December 31, 2016, and 2015 approximates their carrying value as reflected in our consolidated balance sheets because of their short‑term nature. We use a derivative financial instrument, an interest rate swap, to manage interest rate risk. Our policies do not permit the use of derivative financial instruments for speculative purposes. We did not designate the interest rate swap as a hedge for accounting purposes. We record all derivatives as of the end of our reporting period in our consolidated balance sheet at fair value, which is based on quoted

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PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

4. FAIR VALUE MEASUREMENTS (Continued)

market prices, which represents a level 1 in the fair value measurement hierarchy. We may be exposed to credit losses in the event of nonperformance by counterparties to the interest rate swap. The counterparty of the interest rate swap is a lender under our term loan and a credible, large institution, and the Company does not believe there is significant or material credit risk upon settling the contract. The fair value of the interest rate swap liability at December 31, 2016 and 2015 was $0.3 million and $0.5 million, respectively. Based on quoted market prices as of December 31, 2016 and 2015, for contracts with similar terms and maturity date, as provided by the counterparty, we recorded a gain of $0.2 million and a loss of $0.3 million, respectively.

Assets Measured at Fair Value on a Nonrecurring Basis

Assets measured at fair value on a nonrecurring basis at December 31, 2016 and 2015, respectively, are set forth below:

			Estimated fair value measurements
	Carrying Value		Quoted prices in active market (Level 1)		Significant other observable inputs (Level 2)		Significant other unobservable inputs (Level 3)		Total gains (losses)
2016:
Property and equipment, net	$	8,700,000	$	—	$	8,700,000	$	—	$	(6,305,426	)
Goodwill	$	9,424,999	$	—	$	—	$	9,424,999	$	(1,177,148	)
2015:
Property and equipment, net	$	291,838,498	$	—	$	291,838,498	$	—	$	(36,609,332	)

In 2016, the depressed cash flows and continued decline in utilization of our Permian drilling assets were indicative of potential impairment, resulting in the Company comparing the carrying value of the Permian drilling assets with its estimated fair value. We determined that the carrying value of the Permian drilling assets was greater than its estimated fair value and as such an impairment expense was recorded. In 2016, the non‑cash asset impairment charges for Permian drilling was $6.3 million, which had a net carrying value of $15.0 million prior to the impairment write‑down. In 2015, the non‑cash asset impairment charges for Permian drilling and acidizing was $28.6 million and $8 million, respectively, aggregating to a total of $36.6 million. In 2015, the Permian drilling and acidizing assets groups had a net carrying value of $48.1 million and $15.6 million prior to the impairment write‑down. See Note 7, “Impairment of Long‑lived Assets.”

The Company generally applies fair value techniques to our reporting units on a nonrecurring basis associated with valuing potential impairment loss related to goodwill. The Company’s estimate of the reporting unit fair value was based on a combination of income and market approaches, level 1 and 3, respectively in the fair value hierarchy. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value. Significant assumptions include projected revenue growth, capital expenditures, utilization, gross margins, discount rates, and terminal growth rates, and weight allocation between income and market approaches. If the reporting unit’s carrying amount exceeds its fair value, we consider goodwill impaired and perform a second step to measure the amount of the impairment loss. We estimated the fair value as of December 31, 2016 of the surface drilling reporting unit to be $3.8 million and its carrying value was $4.2 million. As a result of the potential impairment with the carrying value exceeding the estimated fair value,

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PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

4. FAIR VALUE MEASUREMENTS (Continued)

we then further determined the implied fair value of the $1.2 million goodwill for the surface drilling reporting unit to be $0. Accordingly, we recorded an impairment loss of $1.2 million. The impairment loss was attributable to the challenging oil and gas market and slow recovery of crude oil prices, all of which adversely impacted on our expected future cash flows for the surface drilling reporting unit. There was no impairment of goodwill recorded in 2015.

5. INTANGIBLE ASSETS

Intangible assets are composed of internally developed software at December 31, 2016 and 2015. Intangible assets are amortized on a straight‑line basis with a useful life of five years. Amortization expense included in net loss for the years ended December 31, 2016 and 2015 was $0.3 million. The Company’s intangible assets subject to amortization are as follows:

	2016		2015
Internally developed software	$	1,439,941	$	1,439,941
Less accumulated amortization	850,902		562,914
Intangible assets — net	$	589,039	$	877,027

Estimated remaining amortization expense for each of the subsequent fiscal years is expected to be as follows:

Year	Estimated Future Amortization Expense
2017	$	287,988
2018	287,988
2019	13,063
Total	$	589,039

The average amortization period remaining is approximately 2.1 years.

6. PROPERTY AND EQUIPMENT

Property and equipment consisted of the following at December 31, 2016 and 2015, respectively:

	2016		2015
Equipment and vehicles	$	402,640,458	$	399,084,240
Leasehold improvements	4,500,406		5,003,838
Subtotal	407,140,864		404,088,078
Less accumulated depreciation	143,279,219		112,249,580
Property and equipment — net	$	263,861,645	$	291,838,498

7. IMPAIRMENT OF LONG‑LIVED ASSETS

Whenever events or circumstances indicate that the carrying value of long‑lived assets may not be recoverable, the Company reviews the carrying value of long‑lived assets, such as property and equipment and other assets to determine if they are recoverable. If any long‑lived assets are determined

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PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

7. IMPAIRMENT OF LONG-LIVED ASSETS (Continued)

to be unrecoverable, an impairment expense is recorded in the period. Asset recoverability is estimated using undiscounted future net cash flows at the lowest identifiable level, excluding interest expense and one‑time other income and expense adjustments. The Company determined the lowest level of identifiable cash flows to be at the asset group level, which consists of hydraulic fracturing, cementing, acidizing, coil tubing, flowback, Permian drilling, and surface drilling.

In 2016, the gradual shift from vertical to horizontal drilling rigs in the Permian Basin has led to the deterioration in utilization of our Permian drilling rigs, and we expect undiscounted future cash flows to be lower than the carrying value of the Permian drilling assets. Given that the carrying value of the Permian drilling assets may not be recoverable, the Company estimated the fair value of the asset group and compared it to its carrying value. Potential impairment exists if the estimated undiscounted future net cash flows for a given asset group is less than the carrying amount of the asset group. The impairment expense is determined by comparing the estimated fair value with the carrying value of the related asset, and any excess amount by which the carrying value exceeds the fair value is recorded as an impairment expense in the period. The estimated fair value of the Permian drilling asset group of $8.7 million was determined using the market approach, which represents a level 2 in the fair value measurement hierarchy. Our fair value estimates required us to use significant other observable inputs including assumptions related to replacement cost, among others. An impairment expense of $6.3 million was recorded in 2016 as the carrying value of the Permian drilling asset group of $15.0 million was greater than its estimated fair value. All other assets groups were determined to be recoverable.

In 2015, the asset groups identified to have impairment were Permian drilling and acidizing, with estimated fair values of approximately $18.8 million and $6.3 million, respectively. The estimated fair value of the Permian drilling and acidizing asset groups was determined using the cost approach, which represents a level 2 in the fair value measurement hierarchy. During the year ended December 31, 2015, the impairment expense for Permian drilling and acidizing was $28.6 million and $8 million, respectively.

8. DEFERRED REVENUE REBATE

In November 2011, the Company acquired certain oilfield fracturing equipment from a customer and agreed to provide future fracturing services to the customer for a period of 78 months in exchange for a 12%$25 million note payable to the customer. The Company recorded the fracturing equipment at its estimated fair value of approximately $13 million and assigned the remaining value of approximately $12 million to a deferred revenue rebate account to be amortized over the customer’s 78‑month service period. In March 2013, the Company repaid the note payable to the customer. For the years ended December 31, 2016 and 2015, the Company recorded $1.8 million of amortization as a reduction of revenue.

9. LONG‑TERM DEBT

On September 30, 2013, the Company entered into a term loan in the amount of $220 million with a $40 million revolving credit line. The facility is secured by a first priority lien and security interest in all assets and equity of the Company. The senior secured credit facility carries a 6.25% interest rate, plus Eurodollar Rate with a 1% floor. The term loan is due September 30, 2019, and requires quarterly principal and interest payments. The revolving credit facility matures on September 30, 2018. The loan proceeds were used to pay off 100% of prior debt outstanding, plus any accrued interest due through September 30, 2013. The excess cash proceeds from the term loan, plus the $40 million revolver, were used as needed to fund growth and working capital needs.

During 2014, the Company additionally entered into certain term notes with the equipment manufacturer of certain fracturing equipment. The interest rate is 9.5% and requires monthly principal and interest payments in 13 installments. The short‑term financing allowed the Company to maintain

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PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

9. LONG‑TERM DEBT (Continued)

maximum liquidity and make future monthly payments with the cash flow the fracturing equipment generated.

On November 24, 2015, the Company entered into 36‑month financing arrangement for three hydraulic fracturing fleets in the amount of $25 million, and a portion of the proceeds were used to pay off the manufacturer notes, with the remainder being used for additional liquidity.

The estimated fair value of the term loan at December 31, 2016 was approximately 89% of the carrying value, or $130.6 million, compared to $146.8 million carrying value. The estimated fair value of the term loan at December 31, 2015 was approximately 60% of the carrying value, or $117.2 million, compared to $195.3 million carrying value. The fair value of the revolver and the equipment financing approximates their carrying values.

Total debt consisted of the following notes at December 31, 2016 and 2015, respectively:

	2016		2015
6.25% Term loan due September 2019	$	146,750,000	$	195,250,000
Revolving credit facility	13,500,000		38,500,000
Equipment refinancing	19,192,838		24,488,140
Total debt	179,442,838		258,238,140
Less deferred loan costs, net of amortization	3,115,679		5,067,009
Subtotal	176,327,159		253,171,131
Less current portion of long‑term debt	16,920,074		16,295,302
Total long‑term debt, net of deferred loan costs	$	159,407,085	$	236,875,829

Covenants — The Company is required to meet certain affirmative and negative covenants that are considered normal and customary for arrangements of this type, with customary exceptions and materiality qualifiers, including, but not limited to, reporting requirements, insurance, maintenance of collateral, and limitations on additional indebtedness, change of control, transactions with affiliates, and distributions.

The financial covenant applicable is a maximum leverage ratio of 3.5x EBITDA (earnings before interest, taxes, depreciation, and amortization) to total debt. Effective March 31, 2014, the Company was required to be in compliance with these financial covenants. The Company was in compliance with the financial covenant at December 31, 2015.

In 2015 given the then near‑term economic uncertainty and volatility of commodity prices, the Company and its equity sponsor, Energy Capital Partners, engaged the lenders in negotiation to amend the existing credit agreement and negative covenants whereby the leverage ratio covenant was expected to be out of compliance as of March 31, 2016 test date. The amendment and waiver agreement was executed on June 8, 2016. The amended credit agreement key terms included Energy Capital Partners infusing $40 million of additional equity into the Company, $10 million of which was reserved for normal working capital and up to $30 million available to repurchase debt (see Note 18). A minority shareholder also infused $0.425 million alongside Energy Capital Partners to prevent dilution. The amendment and waiver also stated that there shall be no leverage ratio test until June 30, 2017, and any required financial statements past‑due were provided within 30 days.

Gain on Extinguishment of Debt — following the credit amendment on June 8, 2016, the Company initiated an auction process with the lenders to repurchase a portion of debt for a price of 80 cents, or a

F-34

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

9. LONG‑TERM DEBT (Continued)

20% discount to par value. The auction settled on June 16, 2016 as the Company repurchased a total amount of $37.5 million of debt for $30 million plus $0.525 million in debt extinguishment auction costs, leading to a gain on extinguishment of debt of $6.975 million.

Annual Maturities — Scheduled annual maturities of total debt are as follows at December 31, 2016:

2017	$	16,920,074
2018	37,772,764
2019	124,750,000
Total	$	179,442,838

On January 13, 2017, the Company paid down $75 million of the term loan using a portion of the proceeds from the private placement offering (see note 18). The one‑time principal payment of $75 million will be applied to the term debt with the remaining principal due upon maturity in 2019.

10. ACCRUED LIABILITIES

Accrued liabilities consisted of the following at December 31, 2016 and 2015, respectively:

	2016		2015
Accrued insurance	$	2,900,221	$	2,778,368
Accrued payroll and related expenses	4,728,614		1,256,269
Other	5,990,636		3,017,278
Total	$	13,619,471	$	7,051,915

11. EMPLOYEE BENEFIT PLAN

The Company has a 401(k) plan whereby all employees with six months of service may contribute up to $15,000 to the plan. The employees vest in the Company contributions to the 401(k) plan 25% per year, beginning in the employee’s second year of service, with full vesting occurring after five years of service. The employees are fully vested in their contributions when made. The Company matches employee contributions 20 cents on the dollar up to 10% of gross salary. The Company has reported expense under the plan of $0.2 million for each of the years ended December 31, 2016 and 2015.

12. REPORTABLE SEGMENT INFORMATION

The Company has seven operating segments for which discreet financial information is readily available: hydraulic fracturing, cementing, acidizing, coil tubing, flowback, surface drilling, and Permian drilling. These segments represent how the chief operating decision maker (CODM) evaluates performance and allocate resources.

In accordance with Accounting Standards Codification (ASC) 280 — Segment Reporting, the Company has one reportable segment (pressure pumping) comprised of the hydraulic fracturing, cementing, and acidizing operating segments. All other operating segments and corporate administrative expenses are included in the “all other”category in the table below. Inter‑segment revenues are not material and were not shown separately in the table below.

The Company manages and assesses the performance of the reportable segment by its adjusted EBITDA (earnings before other income (expense), interest, taxes, depreciation & amortization,

F-35

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

12. REPORTABLE SEGMENT INFORMATION (Continued)

stock‑based compensation expense, impairment expense, loss on disposal of assets). A reconciliation from segment level financial information to the consolidated statement of operations is provided in the table below.

	Pressure Pumping		All Other			Total
Year ended December 31, 2016
Service revenue	$	409,014,337	$	27,905,933		$	436,920,270
Adjusted EBITDA	$	15,655,202	$	(7,839,014	)	$	7,816,188
Depreciation and amortization	$	37,281,862	$	6,259,817		$	43,541,679
Property and equipment impairment expense	$	—	$	6,305,426		$	6,305,426
Goodwill impairment expense	$	—	$	1,177,148		$	1,177,148
Capital expenditures	$	45,472,835	$	535,405		$	46,008,240
Goodwill	$	9,424,999	$	—		$	9,424,999
Total assets	$	501,905,907	$	39,516,391		$	541,422,298
Year ended December 31, 2015
Service revenue	$	510,198,128	$	59,419,630		$	569,617,758
Adjusted EBITDA	$	62,540,290	$	(2,391,032	)	$	60,149,258
Depreciation and amortization	$	38,368,650	$	11,765,343		$	50,133,993
Property and equipment impairment expense	$	7,979,906	$	28,629,426		$	36,609,332
Capital expenditures	$	69,029,321	$	2,647,324		$	71,676,645
Goodwill	$	9,424,999	$	1,177,148		$	10,602,147
Total assets	$	398,449,448	$	48,004,886		$	446,454,334

Reconciliation of net loss to adjusted EBITDA:

	Total
Year ended December 31, 2016
Net loss	$	(53,147,396	)
Depreciation and amortization	43,541,679
Interest expense	20,386,695
Loss on disposal of assets	22,528,670
Property and equipment impairment expense	6,305,426
Goodwill impairment expense	1,177,148
Gain on extinguishment of debt	(6,974,805		)
Stock‑based compensation	1,649,282
Other expense	321,071
Income tax benefit	(27,971,582		)
Adjusted EBITDA (see total above)	$	7,816,188

F-36

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

12. REPORTABLE SEGMENT INFORMATION (Continued)

	Total
Year ended December 31, 2015
Net loss	$	(45,852,684	)
Depreciation and amortization	50,133,993
Interest expense	21,641,454
Loss on disposal of assets	21,267,985
Property and equipment impairment expense	36,609,332
Stock‑based compensation	1,238,824
Other expense	497,924
Income tax expense	(25,387,570		)
Adjusted EBITDA (see total above)	$	60,149,258

Major Customers

For the years ended December 31, 2016 and 2015, the Company had revenue from four significant customers that accounted for the following percentages of the Company’s total revenue:

	2016		2015
Customer A	18.0	%	12.5	%
Customer B	12.5	%	8.8	%
Customer C	8.7	%	14.2	%
Customer D	7.0	%	11.1	%

For the year ended December 31, 2016, pressure pumping made up 96% of Customer A, 99% of Customer B, 100% of Customer C and 99% of Customer D. For the year ended December 31, 2015, pressure pumping made up 99% of Customer A, 100% of Customer B, 88% of Customer C and 99% of Customer D.

13. NET LOSS PER SHARE

The Company’s net loss per share is determined by dividing the net loss relevant to the common stock by the weighted average number of shares outstanding during the year. Diluted net loss per common share uses the same net loss divided by the number of shares that would be outstanding assuming dilutive options and stock are converted (conversion method). The table below shows the calculations for years ended December 31, 2016 and 2015.

	2016			2015
Numerator (both basic and diluted)
Net loss relevant to common stockholders	$	(53,147,396	)	$	(45,852,684	)
Denominator
Denominator for basic earnings (loss) per share	44,786,687			34,992,662
Denominator for diluted earnings (loss) per share	44,786,687			34,992,662
Basic loss per common share	$	(1.19	)	$	(1.31	)
Diluted loss per common share	$	(1.19	)	$	(1.31	)

F-37

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

13. NET LOSS PER SHARE (Continued)

The Company also has non‑vested restricted stock and stock options as shown in the table below, but have not been included in the above calculation of diluted earnings (loss) per share as it would be anti‑dilutive to the calculation above. Additionally, we excluded the preferred stock in the net loss per share calculation because the holders do not have a participating right in the undistributed earnings (loss) of the Company.

	2016	2015
Stock options	4,645,884	3,485,791
Preferred stock	16,999,990	—
Non‑vested restricted stock	372,335	372,335
	22,018,209	3,858,126

14. STOCK‑BASED COMPENSATION

Stock Options — Effective March 4, 2013, the Company adopted the Stock Option Plan of Holding (the “Plan”) pursuant to which the Company’s Board of Directors may grant stock options or other stock‑based awards to key employees, consultants, and directors. The Plan, as amended, is authorized to grant up to 4,645,884 shares of common stock to be issued upon exercise of the options. The Company’s share price used to estimate the fair value of the option at the grant date was based on a combination of income and market approaches, which are highly complex and sensitive. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value of the Company’s stock. The expected term used to calculate the fair value of all options considers the vesting date and the grant’s expiration date. The expected volatility was estimated by considering comparable public companies, and the risk free rate is based on the U.S. treasury yield curve as of the grant date. The dividend assumption is based on historical experience. The fair value and estimates will no longer be necessary if the Company goes public because it will rely on the market price to determine the market value of its common stock. Prior to 2015, the Company had granted a total of 3,499,228 options with an exercise price of $3.96 per option, and all options expire 10 years from the date of grant.

On June 14, 2013, the Company granted 2,799,408 stock option awards to certain key employees and directors that shall vest and become exercisable based upon the achievement of a service requirement. The options vest in 25% increments for each year of continuous service and an option becomes fully vested upon the optionee’s completion of the fourth year of service. The contractual term for the options awarded is 10 years. For the years ended December 31, 2016 and 2015, the Company recognized $1.2 million in compensation expense related to these stock options.

The fair value of each option award granted is estimated on the date of grant using the Black‑Scholes option‑pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.35

On December 1, 2013, the Company granted 699,820 stock option awards to certain key employees that shall vest and become exercisable based upon the achievement of both a service and a performance

F-38

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

14. STOCK‑BASED COMPENSATION (Continued)

requirement. The options vest in 25% increments for each year of continuous service and an option becomes fully vested upon a change in control. As of December 31, 2016, the performance requirement was not considered to be probable of achievement for any of the outstanding option awards and 114,456 options were forfeited during the year ended December 31, 2016. Accordingly, the Company has not recognized any compensation expense related to these stock options. The contractual term for the options awarded is 10 years.

The fair value of each option award granted is estimated on the date of grant using the Black‑Scholes option‑pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.83		%

On July 19, 2016, the Company’s Board of Directors authorized and granted 1,274,549 stock option awards to certain key employees and directors that shall vest and become exercisable based upon the achievement of a service requirement. The options vest in 20% increments for each six months of continuous service with December 2016 being the first vesting period and the options become fully vested as of December 31, 2018. The contractual term for the options awarded is 10 years. For the year ended December 31, 2016, the Company recognized $0.4 million in compensation expense related to these stock options.

The fair value of each option award granted is estimated on the date of grant using the Black‑Scholes option‑pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	55		%
Expected dividends	$	—
Expected term (in years)	5.8
Risk free rate	1.22		%

The total stock compensation expense for the years ended December 31, 2016 and 2015 for all stock options was $1.6 million and $1.2 million, respectively. The tax benefit related to the stock compensation expense recorded for the years ended December 31, 2016 and 2015 was $0.6 million and $0.4 million, respectively. The total unrecognized compensation expense as of December 31, 2016 is $2.4 million, and is expected to be recognized over a weighted‑average period of approximately 1.6 years.

F-39

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

14. STOCK‑BASED COMPENSATION (Continued)

The outstanding options at January 1, 2015 were 3,485,791 as 13,437 options were forfeited in 2014. As of December 31, 2016, none of the options are fully vested. A summary of the stock option activity for the years ended December 31, 2016 and 2015 is presented below.

	Number of Shares		Weighted Average Exercise Price		Weighted Average Grant‑Date Fair Value
Outstanding at January 1, 2015	3,485,791		$	3.96	$	1.77
Granted	—		$	—	$	—
Exercised	—		$	—	$	—
Forfeited	—		$	—	$	—
Expired	—		$	—	$	—
Outstanding at December 31, 2015	3,485,791		$	3.96	$	1.77
Exercisable at December 31, 2015	1,399,704		$	3.96	$	1.77
Outstanding at January 1, 2016	3,485,791		$	3.96	$	1.77
Granted	1,274,549		$	2.25	$	1.77
Exercised	—		$	—	$	—
Forfeited	(114,456	)	$	3.96	$	1.77
Expired	—		$	—	$	—
Outstanding at December 31, 2016	4,645,884		$	3.49	$	1.77
Exercisable at December 31, 2016	2,354,466		$	3.77	$	1.77

Restricted Stock Units — On September 30, 2013, the Company’s Board of Directors authorized and granted 372,335 Restricted Stock Units (RSUs) to a key executive. Each RSU represents the right to receive one share of common stock of the Company at par value $0.001 per share. The shares of common stock subject to the RSUs shall be paid to the grantee upon change in control, whether or not grantee is an employee, consultant, or director of the Company on such date. If the grantee ceases to be an employee, consultant, or director of the Company prior to the settlement date, he shall not forfeit any rights with respect to the RSUs and shall be entitled to receive payment on the settlement date. The fair value of the RSUs is measured as the price of the Company’s shares on the grant date, which was estimated to be $3.89. The Company’s share price used to estimate the fair value of the RSU at the grant date was based on a combination of income and market approaches, which are highly complex and sensitive. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value of the Company’s stock. As of December 31, 2016, the RSUs were not vested as the performance requirement was not considered to be probable of achievement. Accordingly, the Company has not recognized any compensation expense related to these RSUs. There have been no additional RSUs granted, vested or forfeited since September 30, 2013.

F-40

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

15. INCOME TAXES

The components of the provision for income taxes for the year ended December 31, 2016 and 2015 are as follows:

	2016			2015
Federal:
Current	$	—		$	(1,092,437	)
Deferred	(29,082,057		)	(22,176,578		)
	(29,082,057		)	(23,269,015		)
State:
Current	—			(350,494		)
Deferred	1,110,475			(1,768,061		)
	1,110,475			(2,118,555		)
Total benefit	$	(27,971,582	)	$	(25,387,570	)

Reconciliation between the amounts determined by applying the federal statutory rate of 35% to income tax benefit is as follows:

	2016			2015
Tax at federal statutory rate	$	(28,391,642	)	$	(24,934,089	)
State taxes, net of federal benefit	(215,952		)	(885,226		)
Permanent differences	498,131			578,837
Valuation allowance	878,522			—
Other	(740,641		)	(147,092		)
Total provision	$	(27,971,582	)	$	(25,387,570	)

F-41

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

15. INCOME TAXES (Continued)

Deferred tax assets and liabilities are recognized for estimated future tax effects of temporary differences between the tax basis of an asset or liability and its reported amount in the consolidated financial statements. The significant items giving rise to deferred tax assets (liabilities) at December 31, 2016 and 2015, respectively are as follows:

	2016			2015
Deferred Income Tax Assets
Accrued liabilities	334,072			471,223
Allowance for doubtful accounts	194,664			300,640
Goodwill and other intangible assets	10,953,458			13,021,523
Stock‑based compensation	1,692,288			1,119,355
Net operating losses	49,266,688			29,067,458
Other	388,813			388,813
Noncurrent deferred tax assets	$	62,829,983		$	44,369,012
Total deferred tax assets	$	62,829,983		$	44,369,012
Valuation allowance	(878,522		)	—
Total deferred tax assets — net	$	61,951,461		$	44,369,012
Deferred Income Tax Liabilities
Property and equipment	$	(60,958,408	)	$	(70,621,451	)
Prepaid expenses	(1,506,831		)	(1,498,531		)
Other	(634,692		)	(1,369,082		)
Noncurrent deferred tax liabilities	$	(63,099,931	)	$	(73,489,064	)
Net deferred tax liability	$	(1,148,470	)	$	(29,120,052	)

At December 31, 2016, the Company had approximately $175.6 million in net operating loss carryforwards for federal and state income tax purposes, which begin to expire in 2024. Utilization of net operating loss carryforwards may be limited due to past or future ownership changes. For the year ended December 31, 2016, we recorded a net valuation allowance of $0.9 million on the basis of management’s reassessment of the amount of its deferred tax assets that are more likely than not to be realized.

In June 2006, the FASB issued FASB Interpretation (FIN) No. 48, Accounting for Uncertainty in Income Taxes — an interpretation of FASB Statement No. 109 (subsequently codified as ASC 740‑10, Income Taxes, Under FASB Statement No. 168, The FASB Accounting Standards Codification and the Hierarchy of Generally Accepted Accounting Principles — a replacement of FASB Statement No. 162). ASC 740‑10 prescribes a comprehensive model for recognizing, measuring, presenting, and disclosing in the consolidated financial statements tax positions taken or expected to be taken on a tax return, including a decision to file or not to file in a particular jurisdiction.

The Company evaluated all tax positions and determined that the aggregate exposure under ASC 740‑10 did not have a material effect on the consolidated financial statements during the year ended December 31, 2016 or 2015. Therefore, no adjustments have been made to the consolidated financial statements related to the implementation of ASC 740‑10. The Company will continue to evaluate its tax positions in accordance with ASC 740‑10 and will recognize any future effect as a charge to income in the applicable period. Currently, the tax filings for years 2013 to 2015 remain open for examination by taxing authorities.

F-42

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

15. INCOME TAXES (Continued)

Income tax penalties and interest assessments recognized under ASC 740‑10 are accrued as a tax expense in the period that the Company’s taxes are in an uncertain tax position. Any accrued tax penalties or interest assessments will remain until the uncertain tax position is resolved with the taxing authorities or until the applicable statute of limitations has expired.

16. RELATED‑PARTY TRANSACTIONS

The Company leases its corporate offices from a related party pursuant to a five‑year lease agreement with a five‑year extension option requiring a base rent of $72,000 per year. The Company also leases five properties adjacent to the corporate office from related parties with annual base rents of $30,000, $30,000, $90,000, $90,000, and $180,000.

For the years ended December 31, 2016 and 2015, the Company paid approximately $186,000 and $164,000, respectively, for the use of transportation services from a related party.

The Company also rents equipment in Elk City, Oklahoma from a related party. For the years ended December 31, 2016 and 2015, the Company paid $192,000 and $192,000, respectively.

At December 31, 2016 and 2015, the Company had $0 and $0 in payables, respectively, and approximately $35,000 and $18,000 in receivables, respectively, for related parties for services provided.

All agreements pertaining to realty property and equipment were entered into during periods where the Company had limited liquidity and related parties secured them on behalf of the Company. All related party transactions are immaterial and have not been separately shown on the face of the financial statements.

For related party disclosure related to equity transactions with Energy Capital Partners, see Note 18.

17. COMMITMENTS AND CONTINGENCIES

Operating Lease — The Company has various operating leases for office space and certain property and equipment. For the years ended December 31, 2016 and 2015, the Company recorded operating lease expense of $1.4 million for each of the periods. Required remaining lease payments for each fiscal year are as follows:

2017	$	471,416
2018	426,416
2019	366,416
2020	343,916
2021 and thereafter	773,812
Total	$	2,381,976

Contingent Liabilities — The Company may be subject to various legal actions, claims, and liabilities arising in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a materially adverse effect on the Company’s financial position, results of operations, or liquidity.

F-43

PROPETRO HOLDING CORP. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED

DECEMBER 31, 2016 AND 2015

18. EQUITY CAPITALIZATION

Common Stock

At December 31, 2015, ECP and its related affiliates held 30,438,955 of the 34,992,662 outstanding common shares of the Company.

Per the amended credit agreement executed on June 8, 2016 (see Note 9), the majority shareholder, Energy Capital Partners, and its related affiliates along with other shareholders infused $40.425 million of equity into the Company and the Company issued 18,007,328 additional shares of stock. On June 8, 2016, 17,817,925 shares of stock were issued followed by 189,403 on July 13, 2016. As of December 31, 2016, the Company has 52,627,652 common shares outstanding and ECP and its related affiliates hold 48,330,667, increasing ECP ownership interest to 91.8%. The remaining outstanding common shares of the Company are held by management and two prior lenders to the Company.

Convertible Preferred Stock

On December 27, 2016, the Company completed a private placement offering of $170 million, issuing 16,999,990 shares of Series A nonparticipating convertible preferred stock, par value $.001 per share. Costs associated with the offering were approximately $7 million, resulting in net proceeds to the Company of $163 million.

As of December 31, 2016, 16,999,990 shares of Series A convertible preferred stock were issued and outstanding, convertible into common stock at the conversion price per the private placement agreement. Upon a qualifying initial public offering, the Series A Preferred Shares will automatically convert into common stock at a conversion price equal to the lesser of $10.00 per Series A Preferred Share or 90% of the initial public offering price of the common stock. The Company has retained investment bankers with the intention of an initial public offering.

Each share of series A convertible preferred stock is entitled to accrue dividends at the rate of 7% per annum, beginning July 1, 2017. Accrued dividends are payable, in cash or kind, in arrears at a date that is 30 days after the end of each month. Upon the occurrence of any liquidation, dissolution or winding up of the Company, series A preferred stockholders will be entitled to receive an amount equal to the liquidation preference thereon, in preference to the common stockholders, and before any payment or distribution is made on, any junior stock.

Each share of series A preferred stock is entitled to a number of votes per share on an as‑converted basis equal to the number of shares of common stock into which such shares of series A preferred stock is convertible.

On March 22, 2017, we completed our IPO in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold by the Company and 11,750,000 shares sold by existing stockholders. In connection with the IPO, the Company executed a stock split, such that each holder of common stock of the Company received 1.45 shares of common stock for every one share of previous common stock, and all 16,999,990 shares of our outstanding Series A Preferred Stock converted to common stock on a 1:1 basis.

******

F-44

PART II

Information Not Required in Prospectus

Item 13. Other Expenses of Issuance and Distribution

Set forth below are the expenses (other than underwriting discounts and the structuring fee) expected to be incurred in connection with the issuance and distribution of the securities registered hereby. With the exception of the SEC registration fee, the amounts set forth below are estimates.

SEC registration fee	$	22,465
FINRA filing fee	$	27,565
Printing and engraving expenses	$	25,000
Fees and expenses of legal counsel	$	200,000
Accounting and consulting fees and expenses	$	120,000
Transfer agent and registrar fees	$	8,000
Total	$	403,030

____________________

* These fees are calculated based on the number of shares offered and sold and cannot be estimated at this time.

Item 14. Indemnification of Directors and Officers

We are a Delaware corporation. Our certificate of incorporation provides that a director will not be liable to the corporation or its stockholders for monetary damages to the fullest extent permitted by the Delaware General Corporation Law (the “DGCL”). In addition, if the DGCL is amended to authorize the further elimination or limitation of the liability of directors, then the liability of a director of the corporation, in addition to the limitation on personal liability provided for in our certificate of incorporation, will be limited to the fullest extent permitted by the amended DGCL. Our bylaws provide that the corporation will indemnify, and advance expenses to, any officer or director to the fullest extent authorized by the DGCL.

Section 145 of the DGCL provides that a corporation may indemnify directors and officers as well as other employees and individuals against expenses, including attorneys’ fees, judgments, fines and amounts paid in settlement in connection with specified actions, suits and proceedings whether civil, criminal, administrative, or investigative, other than a derivative action by or in the right of the corporation, if they acted in good faith and in a manner they reasonably believed to be in or not opposed to the best interests of the corporation and, with respect to any criminal action or proceeding, had no reasonable cause to believe their conduct was unlawful. A similar standard is applicable in the case of derivative actions, except that indemnification extends only to expenses, including attorneys’ fees, incurred in connection with the defense or settlement of such action and the statute requires court approval before there can be any indemnification where the person seeking indemnification has been found liable to the corporation. The statute provides that it is not exclusive of other indemnification that may be granted by a corporation’s certificate of incorporation, bylaws, disinterested director vote, stockholder vote, agreement or otherwise.

Our certificate of incorporation also contains indemnification rights for our directors and our officers. Specifically, our certificate of incorporation provides that we shall indemnify our officers and directors to the fullest extent authorized by the DGCL. Further, we may maintain insurance on behalf of our officers and directors against expense, liability or loss asserted incurred by them in their capacities as officers and directors.

We have obtained directors’ and officers’ insurance to cover our directors, officers and some of our employees for certain liabilities.

II-I

We have entered into written indemnification agreements with our directors and executive officers. Under these proposed agreements, if an officer or director makes a claim of indemnification to us, either a majority of the independent directors or independent legal counsel selected by the independent directors must review the relevant facts and make a determination whether the officer or director has met the standards of conduct under Delaware law that would permit (under Delaware law) and require (under the indemnification agreement) us to indemnify the officer or director.

Item 15. Recent Sales of Unregistered Securities

During the past three years, we have issued unregistered securities to a limited number of persons, as described below. None of these transactions involved any underwriters, underwriting discounts or commissions or any public offering. We believe that each of these transactions was exempt from the registration requirements pursuant to Section 4(a)(2) of the Securities Act, Regulation D or Regulation S promulgated thereunder or Rule 701 of the Securities Act.

In June and July 2016, we issued 18,007,328 additional shares (after giving effect to the December 22, 2016 reverse stock split and March 2017 stock split) of common stock to certain investment funds managed by Energy Capital Partners and a minority shareholder for $40.425 million. We used the proceeds from the private offering for working capital purposes and to repay indebtedness under our term loan.

In July 2016, pursuant to our 2013 Stock Option Plan, we granted stock options to Spencer D. Armour, III and our named executive officers as set forth below. All of these 2016 options have a $2.25 per share exercise price. Pursuant to their original terms, such stock options were scheduled to vest in five equal semi‑annual installments starting on December 31, 2016. In connection with our IPO, we fully accelerated the vesting of the unvested portion of these stock options.

Dale Redman ‑ 501,540

Jeffrey Smith ‑ 310,971

David Sledge ‑ 231,019

Spencer D. Armour, III ‑ 231,019

Effective as of December 27, 2016, we completed a private placement of 16,999,990 shares of our Series A Convertible Preferred stock, par value $0.001 (the “Series A Preferred Shares”) to certain “accredited investors” (as defined in Regulation D promulgated under the Securities Act of 1933, as amended). We believe that the private offering of Series A Preferred Shares was exempt from the registration requirements pursuant to Rule 506 under Regulation D. We received net proceeds of approximately $163 million.

Item 16. Exhibits

The following documents are filed as exhibits to this registration statement:

Exhibit number	Description
1.1	Form of Underwriting Agreement (including form of Lock-up Agreement).
3.1	Certificate of Incorporation of ProPetro Holding Corp., as amended March 16, 2017 (incorporated by reference herein to Exhibit 3.1 to ProPetro Holding Corp.’s Quarterly Report on Form 10‑Q for the quarter ended March 31, 2017).
3.2	Bylaws of ProPetro Holding Corp. (incorporated by reference herein to Exhibit 3.3 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated March 10, 2017 (Registration No. 333‑215940)).

II-II

Exhibit number	Description
4.1	Specimen Stock Certificate (incorporated by reference herein to Exhibit 4.1 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940).
4.2	Registration Rights Agreement, dated March 4, 2013, by and among ProPetro Holding Corp. and the parties thereto (incorporated by reference herein to Exhibit 4.2 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
4.3	Registration Rights Agreement, dated December 27, 2016, by and among ProPetro Holding Corp. and the investors listed on Schedule A thereto (incorporated by reference herein to Exhibit 4.2 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
4.4	Stockholders Agreement, dated as of March 22, 2017, by and among ProPetro Holding Corp., Energy Capital Partners II, LP, Energy Capital Partners II‑A, LP, Energy Capital Partners II‑B, LP, Energy Capital Partners II‑C (Direct IP), LP, Energy Capital Partners II‑D, LP, Energy Capital Partners II (Midland CoInvest), LP (incorporated by reference herein to Exhibit 4.1 to ProPetro Holding Corp.’s Current Report on Form 8‑K, dated March 28, 2017).
5.1	Opinion of Latham & Watkins LLP as to the legality of the securities being registered
10.1	Form of Indemnification Agreement (incorporated by reference to Exhibit 10.1 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.2	Credit Agreement, dated as of March 22, 2017 by and among ProPetro Holding Corp., ProPetro Services, Inc., Barclays Bank PLC, as the Agent, the Collateral Agent, a Letter of Credit Issuer and the Swingline Lender, and each of the Lenders from time to time party thereto (incorporated by reference herein to Exhibit 10.2 to ProPetro Holding Corp.’s Current Report on Form 8‑K, dated March 28, 2017).
10.3#	Employment Agreement, dated April 17, 2013, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.3 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.4#	Employment Agreement, dated April 17, 2013, by and between ProPetro Holding Corp. and David Sledge (incorporated by reference herein to Exhibit 10.4 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.5#	Employment Agreement, dated April 17, 2013, by and between ProPetro Holding Corp. and Jeffrey Smith (incorporated by reference herein to Exhibit 10.5 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.6#	Stock Option Plan of ProPetro Holding Corp., dated March 4, 2013 (incorporated by reference herein to Exhibit 10.6 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.7#	First Amendment to the Stock Option Plan of ProPetro Holding Corp., dated June 14, 2013 (incorporated by reference herein to Exhibit 10.7 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.8#	Second Amendment to the Stock Option Plan of ProPetro Holding Corp., dated December 2, 2016 (incorporated by reference herein to Exhibit 10.8 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.9#	Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.9 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.10#	Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and David Sledge (incorporated by reference herein to Exhibit 10.10 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).

II-III

Exhibit number	Description
10.11#	Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and Jeffrey Smith (incorporated by reference herein to Exhibit 10.11 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.12#	Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and Spencer D. Armour, III (incorporated by reference herein to Exhibit 10.12 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.13#	Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.13 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.14#	Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and David Sledge (incorporated by reference herein to Exhibit 10.14 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.15#	Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and Jeffrey Smith (incorporated by reference herein to Exhibit 10.15 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.16#	Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and Spencer D. Armour, III (incorporated by reference herein to Exhibit 10.16 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.17#	Restricted Stock Unit Grant Notice and Restricted Stock Unit Agreement, dated September 30, 2013, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.17 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.18#	Form of ProPetro Holding Corp. 2017 Incentive Award Plan (incorporated by reference to Exhibit 10.18 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated March 7, 2017 (Registration No. 333‑215940)).
10.19#	Form of ProPetro Holding Corp. Senior Executive Incentive Bonus Plan (incorporated by reference to Exhibit 10.19 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.20#	Form of ProPetro Holding Corp. Non‑Employee Director Compensation Policy (incorporated by reference to Exhibit 10.20 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.21#	Form of ProPetro Holding Corp. Director Stock Ownership Policy (incorporated by reference to Exhibit 10.21 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.22#	Form of ProPetro Holding Corp. 2017 Incentive Award Plan Stock Option Grant Notice and Stock Option Agreement (incorporated by reference to Exhibit 10.22 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.23#	Form of ProPetro Holding Corp. Amendment to Non‑Qualified Stock Option Agreement (incorporated by reference to Exhibit 10.23 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.24#	Amendment to Employment Agreement, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.24 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)
10.25#	Employment Agreement, dated February 17, 2017, by and between ProPetro Holding Corp. and Mark Howell (incorporated by reference herein to Exhibit 10.25 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)

II-IV

Exhibit number	Description
10.26#	Form of ProPetro Holding Corp. 2017 Incentive Award Plan Performance Restricted Stock Unit Award Grant Notice and Performance Stock Unit Award Agreement (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Quarterly Report on Form 10-Q for the period ended June 30, 2017).
10.27#	Form of ProPetro Holding Corp. 2017 Incentive Award Plan Restricted Stock Unit Award Grant Notice and Restricted Stock Unit Award Agreement (incorporated by reference herein to Exhibit 10.2 to ProPetro Holding Corp.’s Quarterly Report on Form 10-Q for the period ended June 30, 2017).
10.28#	Form of ProPetro Holding Corp. 2017 Incentive Award Plan Director Restricted Stock Unit Award Grant Notice and Director Restricted Stock Unit Award Agreement (incorporated by reference herein to Exhibit 10.3 to ProPetro Holding Corp.’s Quarterly Report on Form 10-Q for the period ended June 30, 2017).
21.1	List of Subsidiaries of ProPetro Holding Corp. (incorporated by reference herein to Exhibit 21.1 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
23.1	Consent of Deloitte & Touche LLP
23.2	Consent of Latham & Watkins LLP (contained in Exhibit 5.1)
24.1	Power of Attorney (contained on the signature page to this Registration Statement).
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Labels Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

_____________________

# Compensatory plan, contract or arrangement.

Item 17. Undertakings

Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act of 1933 and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question of whether such indemnification by it is against public policy as expressed in the Securities Act of 1933 and will be governed by the final adjudication of such issue.

The undersigned registrant hereby undertakes that,

(1)    For purposes of determining any liability under the Securities Act of 1933, the information omitted from the form of prospectus filed as part of this registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities Act shall be deemed to be part of this registration statement as of the time it was declared effective.

(2)    For the purpose of determining any liability under the Securities Act of 1933, each such post‑effective amendment shall be deemed a new registration statement relating to the securities

II-V

offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3)    For purpose of determining liability under the Securities Act of 1933 to any purchaser, each prospectus filed pursuant to Rule 424(b) as part of a registration statement relating to an offering, other than registration statements relying on Rule 430B or other than prospectuses filed in reliance on Rule 430A, shall be deemed to be part of and included in the registration statement as of the date it is first used after effectiveness Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such first use, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such date of first use.

(4)    For the purpose of determining liability of the registrant under the Securities Act of 1933 to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(a)    Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(b)    Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;

(c)    The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

(d)    Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

II-VI

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Midland, Texas, on November 2, 2017.

ProPetro Holding Corp.
By:	/s/ Dale Redman
Name:	Dale Redman
Title:	Chief Executive Officer

Each person whose signature appears below constitutes and appoints Jeffrey Smith and Dale Redman, and each of them, with full power to act without the other, as attorneys‑in‑fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments (including post‑effective amendments) to this registration statement, and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Commission, granting unto each said attorney‑in‑fact and agent full power and authority to do and perform each and every act in person, hereby ratifying and confirming all that said attorneys‑in‑fact and agents or either of them or their or his substitute or substitutes may lawfully do or cause to be done by virtue hereof.

II-VII

Pursuant to the requirements of the Securities Act of 1933, as amended this Registration Statement has been signed by the following persons in the capacities indicated on November 2, 2017.

Signature	Title
/s/ Dale Redman	Chief Executive Officer and Director (Principal Executive Officer)
Dale Redman
/s/ Jeff Smith	Chief Financial Officer (Principal Financial Officer)
Jeff Smith
/s/ Ian Denholm	Chief Accounting Officer (Principal Accounting Officer)
Ian Denholm
/s/ Spencer D. Armour	Director
Spencer D. Armour, III
/s/ Steven Beal	Director
Steven Beal
/s/ Schuyler E. Coppedge	Director
Schuyler E. Coppedge
/s/ Alan E. Douglas	Director
Alan E. Douglas
/s/ Stephen Herman	Director
Stephen Herman
/s/ Matthew H. Himler	Director
Matthew H. Himler
/s/ Peter Labbat	Director
Peter Labbat
/s/ Chris Leininger	Director
Chris Leininger
/s/ Jack B. Moore	Director
Jack B. Moore

II-VIII

EXHIBIT INDEX

Exhibit number	Description
1.1	Form of Underwriting Agreement (including form of Lock-Up Agreement).
3.1	Certificate of Incorporation of ProPetro Holding Corp., as amended March 16, 2017 (incorporated by reference herein to Exhibit 3.1 to ProPetro Holding Corp.’s Quarterly Report on Form 10‑Q for the quarter ended March 31, 2017).
3.2	Bylaws of ProPetro Holding Corp. (incorporated by reference herein to Exhibit 3.3 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated March 10, 2017 (Registration No. 333‑215940)).
4.1	Specimen Stock Certificate (incorporated by reference herein to Exhibit 4.1 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940).
4.2	Registration Rights Agreement, dated March 4, 2013, by and among ProPetro Holding Corp. and the parties thereto (incorporated by reference herein to Exhibit 4.2 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
4.3	Registration Rights Agreement, dated December 27, 2016, by and among ProPetro Holding Corp. and the investors listed on Schedule A thereto (incorporated by reference herein to Exhibit 4.2 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
4.4	Stockholders Agreement, dated as of March 22, 2017, by and among ProPetro Holding Corp., Energy Capital Partners II, LP, Energy Capital Partners II‑A, LP, Energy Capital Partners II‑B, LP, Energy Capital Partners II‑C (Direct IP), LP, Energy Capital Partners II‑D, LP, Energy Capital Partners II (Midland Co‑Invest), LP (incorporated by reference herein to Exhibit 4.1 to ProPetro Holding Corp.’s Current Report on Form 8‑K, dated March 28, 2017).
5.1	Opinion of Latham & Watkins LLP as to the legality of the securities being registered
10.1	Form of Indemnification Agreement (incorporated by reference to Exhibit 10.1 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.2	Credit Agreement, dated as of March 22, 2017 by and among ProPetro Holding Corp., ProPetro Services, Inc., Barclays Bank PLC, as the Agent, the Collateral Agent, a Letter of Credit Issuer and the Swingline Lender, and each of the Lenders from time to time party thereto (incorporated by reference herein to Exhibit 10.2 to ProPetro Holding Corp.’s Current Report on Form 8‑K, dated March 28, 2017).
10.3#	Employment Agreement, dated April 17, 2013, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.3 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.4#	Employment Agreement, dated April 17, 2013, by and between ProPetro Holding Corp. and David Sledge (incorporated by reference herein to Exhibit 10.4 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.5#	Employment Agreement, dated April 17, 2013, by and between ProPetro Holding Corp. and Jeffrey Smith (incorporated by reference herein to Exhibit 10.5 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.6#	Stock Option Plan of ProPetro Holding Corp., dated March 4, 2013 (incorporated by reference herein to Exhibit 10.6 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.7#	First Amendment to the Stock Option Plan of ProPetro Holding Corp., dated June 14, 2013 (incorporated by reference herein to Exhibit 10.7 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.8#	Second Amendment to the Stock Option Plan of ProPetro Holding Corp., dated December 2, 2016 (incorporated by reference herein to Exhibit 10.8 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).

II-IX

Exhibit number	Description
10.9#	Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.9 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.10#	Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and David Sledge (incorporated by reference herein to Exhibit 10.10 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.11#	Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and Jeffrey Smith (incorporated by reference herein to Exhibit 10.11 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.12#	Non‑Qualified Stock Option Agreement, dated June 14, 2013, by and between ProPetro Holding Corp. and Spencer D. Armour, III (incorporated by reference herein to Exhibit 10.12 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.13#	Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.13 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.14#	Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and David Sledge (incorporated by reference herein to Exhibit 10.14 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.15#	Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and Jeffrey Smith (incorporated by reference herein to Exhibit 10.15 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.16#	Non‑Qualified Stock Option Agreement, dated July 19, 2016, by and between ProPetro Holding Corp. and Spencer D. Armour, III (incorporated by reference herein to Exhibit 10.16 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
10.17#	Restricted Stock Unit Grant Notice and Restricted Stock Unit Agreement, dated September 30, 2013, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.17 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)
10.18#	Form of ProPetro Holding Corp. 2017 Incentive Award Plan (incorporated by reference to Exhibit 10.18 to the Company’s Registration Statement on Form S‑1, dated March 7, 2017 (Registration No. 333‑215940)).
10.19#	Form of ProPetro Holding Corp. Senior Executive Incentive Bonus Plan (incorporated by reference to Exhibit 10.19 to the Company’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.20#	Form of ProPetro Holding Corp. Non‑Employee Director Compensation Policy (incorporated by reference to Exhibit 10.20 to the Company’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.21#	Form of ProPetro Holding Corp. Director Stock Ownership Policy (incorporated by reference to Exhibit 10.21 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.22#	Form of ProPetro Holding Corp. 2017 Incentive Award Plan Stock Option Grant Notice and Stock Option Agreement (incorporated by reference to Exhibit 10.22 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).

II-X

Exhibit number	Description
10.23#	Form of ProPetro Holding Corp. Amendment to Non‑Qualified Stock Option Agreement (incorporated by reference to Exhibit 10.23 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.24#	Amendment to Employment Agreement, by and between ProPetro Holding Corp. and Dale Redman (incorporated by reference herein to Exhibit 10.24 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.25#	Employment Agreement, dated February 17, 2017, by and between ProPetro Holding Corp. and Mark Howell (incorporated by reference herein to Exhibit 10.25 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 23, 2017 (Registration No. 333‑215940)).
10.26#	Form of ProPetro Holding Corp. 2017 Incentive Award Plan Performance Restricted Stock Unit Award Grant Notice and Performance Stock Unit Award Agreement (incorporated by reference herein to Exhibit 10.1 to ProPetro Holding Corp.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2017).
10.27#	Form of ProPetro Holding Corp. 2017 Incentive Award Plan Restricted Stock Unit Award Grant Notice and Restricted Stock Unit Award Agreement (incorporated by reference herein to Exhibit 10.2 to ProPetro Holding Corp.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2017).
10.28#	Form of ProPetro Holding Corp. 2017 Incentive Award Plan Director Restricted Stock Unit Award Grant Notice and Director Restricted Stock Unit Award Agreement (incorporated by reference herein to Exhibit 10.3 to ProPetro Holding Corp.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2017).
21.1	List of Subsidiaries of ProPetro Holding Corp. (incorporated by reference herein to Exhibit 21.1 to ProPetro Holding Corp.’s Registration Statement on Form S‑1, dated February 7, 2017 (Registration No. 333‑215940)).
23.1	Consent of Deloitte & Touche LLP
23.2	Consent of Latham & Watkins LLP (contained in Exhibit 5.1)
24.1	Power of Attorney (contained on the signature page to this Registration Statement).
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Labels Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

_____________________

# Compensatory plan, contract or arrangement.

II-XI

10,000,000 Shares

ProPetro Holding Corp.

Common Stock

ProPetro Holding Corp.

Goldman Sachs & Co. LLC

EX-1.1

Exhibit 1.1

ProPetro Holding Corp.

10,000,000 Shares of Common Stock,

par value $0.001 per share

Form of Underwriting Agreement

November [•], 2017

Goldman Sachs & Co. LLC,

As representative of the several Underwriters named in Schedule I hereto,

c/o Goldman Sachs & Co. LLC,

200 West Street,

New York, New York 10282

Ladies and Gentlemen:

The stockholders of ProPetro Holding Corp., a Delaware corporation (the “Company”), named in Schedule II hereto (the “Selling Stockholders”) propose, subject to the terms and conditions stated in this agreement (this “Agreement”), to sell to the Underwriters named in Schedule I hereto (the “Underwriters”) an aggregate of 10,000,000 shares of common stock, par value $0.001 per share (“Stock”), of the Company, and, at the election of Goldman Sachs & Co. LLC (the “Option”), up to 1,500,000 additional shares of Stock. The aggregate of 10,000,000 shares of Stock to be sold by the Selling Stockholders is herein called the “Firm Shares” and the aggregate of 1,500,000 additional shares of Stock to be sold by the Selling Stockholders is herein called the “Optional Shares.” The Firm Shares and the Optional Shares that Goldman Sachs & Co. LLC elects to purchase pursuant to Section 2 hereof are herein collectively called the “Shares”.

1.(a)    The Company represents and warrants to, and agrees with, each of the Underwriters that:

(i)A registration statement on Form S‑1 (File No. 333-[•]) (the “Initial Registration Statement”) in respect of the Shares has been filed with the Securities and Exchange Commission (the “Commission”); the Initial Registration Statement and any post-effective amendment thereto, each in the form heretofore delivered to you and, excluding exhibits thereto, to you for each of the other Underwriters, have been declared effective by the Commission in such form; other than a registration statement, if any, (i) increasing the size of the offering (a “Rule 462(b) Registration Statement”), filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended (the “Act”), which became effective upon filing, or (ii) adding exhibits to the Initial Registration Statement (a “Rule 462 (d) Registration Statement”), filed pursuant to Rule 462(d) under the Act, which became effective upon filing, no other document with respect to the Initial Registration Statement has heretofore been filed with the Commission; and no stop order suspending the effectiveness of the Initial Registration Statement, any post-effective amendment thereto or the Rule 462(b) Registration Statement or Rule 462(d) Registration Statement, if any, has been issued and no proceeding for that purpose has been initiated or, to the knowledge of the Company, threatened by the Commission (any preliminary prospectus included in the Initial Registration Statement or filed with the Commission pursuant to Rule 424(a) under the Act is hereinafter called a “Preliminary

Prospectus”; the various parts of the Initial Registration Statement, the Rule 462(b) Registration Statement and the Rule 462(d) Registration Statement, if any, including all exhibits thereto and including the information contained in the form of final prospectus filed with the Commission pursuant to Rule 424(b) under the Act in accordance with Section 5(a) hereof and deemed by virtue of Rule 430A under the Act to be part of the Initial Registration Statement at the time it was declared effective, each as amended at the time such part of the Initial Registration Statement became effective or such part of the Rule 462(b) Registration Statement or Rule 462(d) Registration Statement, if any, became or hereafter becomes effective, are hereinafter collectively called the “RegistrationStatement”; the Preliminary Prospectus relating to the Shares that was included in the Registration Statement immediately prior to the Applicable Time (as defined in Section 1(a)(iii) hereof) is hereinafter called the “Pricing Prospectus”; such final prospectus, in the form first filed pursuant to Rule 424(b) under the Act, is hereinafter called the “Prospectus”; and any “issuer free writing prospectus” as defined in Rule 433 under the Act relating to the Shares is hereinafter called an “Issuer Free Writing Prospectus”);

(ii)No order preventing or suspending the use of any Preliminary Prospectus or any Issuer Free Writing Prospectus has been issued by the Commission, and each Preliminary Prospectus, at the time of filing thereof, conformed in all material respects to the requirements of the Act and the rules and regulations of the Commission thereunder, and did not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter through the Representative expressly for use therein (it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 9(c) hereof);

(iii)For the purposes of this Agreement, the “Applicable Time” is [•] [am/pm] (Eastern time) on the date of this Agreement; the Pricing Prospectus, as supplemented by the information listed on Schedule III(c) hereto, taken together (collectively, the “PricingDisclosure Package”), as of the Applicable Time, did not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; and each Issuer Free Writing Prospectus listed on Schedule III(a) hereto does not conflict with the information contained in the Registration Statement, the Pricing Prospectus or the Prospectus and each such Issuer Free Writing Prospectus, each as supplemented by and taken together with the Pricing Disclosure Package, as of the Applicable Time, did not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to statements or omissions made in an Issuer Free Writing Prospectus in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter through the Representative expressly for use therein (it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 9(c) hereof);

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(iv)No documents were filed with the Commission since the Commission’s close of business on the business day immediately prior to the date of this Agreement and prior to the execution of this Agreement, except as set forth on Schedule III(b) hereto;

(v)The Registration Statement conforms, and the Prospectus and any further amendments or supplements to the Registration Statement and the Prospectus will conform, in all material respects to the applicable requirements of the Act and the rules and regulations of the Commission thereunder and do not and will not, as of the applicable effective date as to each part of the Registration Statement and as of the applicable filing date as to the Prospectus and any amendment or supplement thereto, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter through the Representative expressly for use therein (it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 9(c) hereof);

(vi)Neither the Company nor any of its subsidiaries has sustained since the date of the latest audited financial statements included in the Pricing Prospectus any material loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, other than as set forth or contemplated in the Pricing Prospectus; and, since the respective dates as of which information is given in the Registration Statement and the Pricing Prospectus, there has not been any change in the capital stock or long-term debt of the Company or any of its subsidiaries or any material adverse change, or any development involving a prospective material adverse change, in or affecting the business, properties, general affairs, management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries or the ability of the Company to perform its obligations under, or consummate the transaction contemplated by, this Agreement (any of the foregoing, a “Material Adverse Effect”), otherwise than as set forth or contemplated in the Pricing Prospectus;

(vii)The Company and its subsidiaries have good and marketable title in fee simple to all real property and good and marketable title to all personal property owned by them, in each case free and clear of all liens, encumbrances and defects except such as are described in the Pricing Prospectus or such as do not materially affect the value of such property and do not interfere with the use made and proposed to be made of such property by the Company and its subsidiaries; and any real property and buildings held under lease by the Company and its subsidiaries are held by them under valid, subsisting and enforceable leases with such exceptions as are not material and do not interfere with the use made and proposed to be made of such property and buildings by the Company and its subsidiaries;

(viii)The Company has been duly incorporated and is validly existing as a corporation in good standing under the laws of the State of Delaware, with power and authority to own its properties and conduct its business as described in the Pricing Prospectus, and has been duly qualified as a foreign corporation for the transaction of business and is in good standing under the laws of each other jurisdiction in which it owns or leases properties or conducts any business so as to require such qualification, except where the failure to be duly qualified or in good standing would not, individually or in the aggregate, reasonably be

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expected to have a Material Adverse Effect; and each subsidiary of the Company has been, as the case may be, (A) duly incorporated and is validly existing as a corporation in good standing under the laws of its jurisdiction of incorporation or (B) duly formed and is validly existing as a limited liability company in good standing under the laws of the jurisdiction of its formation, except, in each case, where the failure to be duly qualified or in good standing would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect;

(ix)The Company has an authorized capitalization as set forth in the Pricing Prospectus and all of the issued shares of capital stock of the Company, including the Shares to be sold by the Selling Stockholders, have been duly and validly authorized and issued and are fully paid and non-assessable and conform to the description of the Stock contained in the Pricing Disclosure Package and the Prospectus; and all of the issued shares of capital stock of each subsidiary of the Company have been duly and validly authorized and issued, are fully paid and non-assessable and are owned directly or indirectly by the Company, free and clear of all liens, encumbrances, equities or claims (“Liens”), except (A) Liens under the Credit Agreement, dated as of March 22, 2017, by and among the Company, ProPetro Services, Inc., Barclays Bank PLC, as the Agent, the Collateral Agent, a Letter of Credit Issuer and the Swingline Lender, and each of the lenders from time to time party thereto (the “Credit Facility”) and (B) as disclosed in the Pricing Disclosure Package and the Prospectus;

(x)The offering and sale of the Shares as described in the Pricing Prospectus and the execution, delivery and compliance by the Company with this Agreement and the consummation of the transactions herein contemplated will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, (A) any indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries is bound or to which any of the property or assets of the Company or any of its subsidiaries is subject, (B) the certificate of incorporation, by-laws, certificate of formation, limited liability company agreement or other organizational document (the “Organizational Documents”), as the case may be, of the Company or any of its subsidiaries, or (C) any statute or any judgment, order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its subsidiaries or any of their properties, except in the case of clause (A) as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect; and no consent, approval, authorization, order, registration or qualification of or with any such court or governmental agency or body is required for the offering and sale of the Shares by the Selling Stockholders or the consummation by the Company and the Selling Stockholders of the transactions contemplated by this Agreement, except for the registration under the Act of the Shares, and such consents, approvals, authorizations, orders, registrations or qualifications as may be required under state securities or Blue Sky laws in connection with the purchase and distribution of the Shares by the Underwriters;

(xi)Neither the Company nor any of its subsidiaries is in violation of (A) its Organizational Documents or (B) in default in the performance or observance of any material obligation, agreement, covenant or condition contained in any indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which it is a party or by which it or any of its properties may be bound, except in the case of clause (B) for any such default that would not, individually or in the aggregate, have a Material Adverse Effect;

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(xii)The statements set forth in the Pricing Prospectus and the Prospectus under the caption “Description of Capital Stock”, insofar as they purport to constitute a summary of the terms of the Stock, and under the caption “Material U.S. Federal Income Tax Consequences to Non-U.S. Holders”, insofar as they purport to describe the provisions of the laws and documents referred to therein, are accurate, complete, and fair;

(xiii)Other than as set forth in the Pricing Prospectus, there are no legal or governmental proceedings pending to which the Company or any of its subsidiaries or, to the Company’s knowledge, any officer or director of the Company, is a party or of which any property or assets of the Company or any of its subsidiaries or, to the Company’s knowledge, any officer or director of the Company, is the subject which, if determined adversely to the Company or any of its subsidiaries (or such officer or director), would individually or in the aggregate, have a Material Adverse Effect; and, to the best of the Company’s knowledge, no such proceedings are threatened or contemplated by governmental authorities or threatened by others;

(xiv)from the time of initial confidential submission of a registration statement relating to the Shares with the Commission (or, if earlier, the first date on which an oral or written communication with potential investors undertaken in reliance on Section 5(d) of the Act (a “Section 5(d) Communication”) was made) through the date hereof, the Company has been and is an “emerging growth company” as defined in Section 2(a)(19) of the Act (an “Emerging Growth Company”);

(xv)The Company and each of its subsidiaries are not and, after giving effect to the offering and sale of the Shares and the application of the proceeds thereof, will not be an “investment company”, as such term is defined in the Investment Company Act of 1940, as amended (the “Investment Company Act”);

(xvi)At the time of filing the Initial Registration Statement and any post-effective amendment thereto, at the earliest time thereafter that the Company or any offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) under the Securities Act) of the Shares, and at the date hereof, the Company was not and is not an “ineligible issuer”, as defined in Rule 405 under the Act;

(xvii)Deloitte & Touche LLP (“Deloitte”), who have certified certain financial statements of the Company and its subsidiaries, are independent public accountants as required by the Act and the rules and regulations of the Commission thereunder;

(xviii)The Company maintains a system of internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) that complies with the requirements of the Exchange Act and has been designed by the Company’s principal executive officer and principal financial officer, or under their 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 in the United States.

Except as described in the Registration Statement, the Pricing Disclosure Package or the Prospectus, the Company’s internal control over financial reporting is effective and the Company is not aware of any material weaknesses in its internal control over financial reporting. The Company’s internal control over financial reporting is sufficient to provide

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reasonable assurance that (i) transactions are executed in accordance with management’s general or specific authorization; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with generally accepted accounting principles and to maintain accountability for assets; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; and (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences. There is and has been no failure on the part of the Company and any of the Company’s directors or officers, in their capacities as such, to comply with any provision of the Sarbanes-Oxley Act of 2002 and all rules and regulations promulgated thereunder or implementing the provisions thereof applicable to the Company;

(xix)Since the date of the latest audited financial statements included in the Pricing Prospectus, there has been no change in the Company’s internal control over financial reporting that has materially and adversely affected, or is reasonably likely to materially and adversely affect, the Company’s internal control over financial reporting;

(xx)The Company maintains disclosure controls and procedures (as such term is defined in Rule 13a-15(e) under the Exchange Act) that comply with the requirements of the Exchange Act; such disclosure controls and procedures have been designed to ensure that material information relating to the Company and its subsidiaries is made known to the Company’s principal executive officer and principal financial officer by others within those entities; and such disclosure controls and procedures are effective in all material respects to perform the functions for which they were established;

(xxi)This Agreement has been duly authorized, executed and delivered by the Company;

(xxii)None of the Company, any of its subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee, affiliate or other person associated with or acting on behalf of the Company or any of its subsidiaries has (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (ii) made or taken an act in furtherance of an offer, promise or authorization of any direct or indirect unlawful payment to any foreign or domestic government official or employee from corporate funds, including of any government-owned or controlled entity or of a public international organization, or any person acting in an official capacity for or on behalf of the foregoing, or any political party, party official or candidate for political office; (iii) violated or is in violation of any provision of the Foreign Corrupt Practices Act of 1977, as amended (the “FCPA”), the Bribery Act 2010 of the United Kingdom (the “UK Bribery Act”), any applicable law or regulation implementing the OECD Convention on Combating Bribery of Foreign Public Officials in International Business Transactions (the “OECD Anti-Bribery Convention”) or any other applicable anti-bribery or anti-corruption law; or (iv) made any bribe, rebate, payoff, influence payment, kickback or other unlawful payment, or offered, agreed, requested or promised to make any such payment or taken an act in furtherance of any unlawful bribe or other unlawful benefit, including, without limitation, any rebate, payoff, influence, benefit, kickback or other unlawful or improper payment or benefit. The Company and its subsidiaries have instituted, maintain and enforce, and will continue to maintain and enforce policies and procedures designed to promote and ensure compliance with all applicable anti-bribery and anti-corruption laws;

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(xxiii)The operations of the Company and its subsidiaries are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements, including those of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any governmental agency having jurisdiction over the Company or any of its subsidiaries (collectively, the “Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Company, threatened;

(xxiv)(A) None of the Company, any of its subsidiaries or, to the knowledge of the Company, any director, officer, agent, employee or affiliate of the Company or any of its subsidiaries (i) is currently the subject or the target of any sanctions administered or enforced by the U.S. Government, including, without limitation, the Office of Foreign Assets Control of the U.S. Department of the Treasury (the “Treasury Department”), or the U.S. Department of State and including, without limitation, the designation as a “specially designated national” or “blocked person,” the European Union, Her Majesty’s Treasury, the United Nations Security Council, or other relevant sanctions authority (collectively, “Sanctions”), (ii) is located, organized or resident in any country or territory that is the subject or target of Sanctions or does any business with or involving the government of, or any person or project located in, any country targeted by any Sanctions or (iii) supports or facilitates any such business or project; (B) the Company is not controlled (within the meaning of the executive orders or regulations promulgating Sanctions) by any government or person that is the subject or target of Sanctions; and (C) the Company has implemented and maintains adequate internal controls and procedures to monitor and audit transactions that are reasonably designed to detect and prevent any action that is inconsistent with any of the Company’s representations and obligations under this paragraph. For the past five years, the Company and its subsidiaries have not knowingly engaged in and are not now knowingly engaged in any dealings or transactions with any person that at the time of the dealing or transaction is or was the subject or target of, or in any country or territory that is the subject or target of, Sanctions;

(xxv)Each “employee benefit plan” (within the meaning of Section 3(3) of the Employee Retirement Security Act of 1974, as amended (“ERISA”)) for which the Company or any member of its “Controlled Group” (defined as any organization which is a member of a controlled group of corporations within the meaning of Section 414 of the Internal Revenue Code of 1986, as amended (the “Code”) or 4001 of ERISA) would have any liability (each a “Plan”) (i) complies in form with the requirements of all applicable statutes, rules and regulations including ERISA and the Code, and has been maintained and administered in substantial compliance with its terms and with the requirements of all applicable statutes, rules and regulations including ERISA and the Code; (ii) with respect to each Plan subject to Title IV of ERISA or Section 302 of ERISA or Sections 412 and 430 of the Code (a) no “reportable event” (within the meaning of Section 4043(c) of ERISA) has occurred or is reasonably expected to occur, (b) no failure to satisfy the minimum funding standard (within the meaning of Section 302 of ERISA or Sections 412 and 430 of the Code), whether or not waived, has occurred or is reasonably expected to occur, (c) the fair market value of the assets under each Plan (excluding for these purposes accrued but unpaid contributions) exceeds the present value of all benefits accrued under such Plan (determined based on those assumptions used to fund such Plan) and (d) neither the Company nor any member of its Controlled Group

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has incurred, or reasonably expects to incur, any liability under Title IV of ERISA in respect of a Plan (including a “multiemployer plan”, within the meaning of Section 4001(c)(3) of ERISA); (iii) each Plan that is intended to be qualified under Section 401(a) of the Code is so qualified and nothing has occurred, whether by action or by failure to act, which would cause the loss of such qualification; and (iv) no prohibited transaction, within the meaning of Section 406 of ERISA or Section 4975 of the Code, has occurred with respect to any Plan excluding transactions to which a statutory or administrative prohibited transaction exemption applies;

(xxvi)Except as disclosed in the Pricing Prospectus and the Prospectus, the Company and its subsidiaries (A) are in compliance with any and all applicable foreign, federal, state and local laws and regulations relating to the protection of human health and safety (to the extent related to exposure to hazardous or toxic substances or wastes, pollutants, or contaminants), or the environment (including, without limitation, ambient air, surface water, groundwater, land surface or subsurface strata) or wildlife, including, without limitation, laws and regulations imposing liability or standards of conduct concerning, or relating to the release or threatened release of, any pollutants, chemicals, contaminants, solid or hazardous wastes, materials, substances, any petroleum or petroleum products, or any polychlorinated biphenyls or radioactive materials (collectively, “Hazardous Materials”) or to the manufacture, processing, distribution, use, treatment, storage, disposal, transport, arrangement for disposal or transport, release, threatened release or handling of, or exposure to, Hazardous Materials (collectively, “Environmental Laws”), (B) have received and are in compliance with all permits, licenses or other approvals required of them under applicable Environmental Laws to conduct their respective businesses as they are currently being conducted and as they are proposed to be conducted on each Time of Delivery (as defined in Section 4 hereof), (C) have not received written notice of any actual or potential liability under any Environmental Law and (D) are not a party to, nor are their operations the subject of, any pending or, to the Company’s knowledge, threatened action, suit or proceeding relating to any alleged violation of any Environmental Law or relating to any actual or alleged release or threatened release or cleanup at any location of any hazardous or toxic substances or wastes, pollutants or contaminants, except in each case of clause (A) through (D), to the extent such matters would be reasonably likely to result in a Material Adverse Effect. Neither the Company nor any of its subsidiaries has been notified in writing that they are currently named as a “potentially responsible party” under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended, except as would not, individually or in the aggregate, be reasonably likely to result in a Material Adverse Effect;

(xxvii)In the ordinary course of its business, the Company periodically reviews the effect of Environmental Laws on the business, operations and properties of the Company and its subsidiaries, in the course of which it identifies and evaluates associated costs and liabilities (including, without limitation, any capital or operating expenditures required for clean-up, closure of properties or compliance with Environmental Laws, or any permit, license or approval, any related constraints on operating activities and any potential liabilities to third parties). On the basis of such review, the Company has concluded that such reasonably anticipated associated costs and liabilities would not have a Material Adverse Effect, except as described in the Registration Statement, the Pricing Prospectus and the Prospectus;

(xxviii)(A) Except as disclosed in the Pricing Prospectus, there are no persons with registration rights or other similar rights to have any securities registered pursuant to the

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Registration Statement or otherwise registered by the Company under the Act except as have been validly waived or complied with and (B) the holders of outstanding shares of the Company’s capital stock are not entitled to preemptive or other rights to subscribe for the Shares that have not been complied with or otherwise effectively waived;

(xxix)Any statistical, industry-related and market-related data included in the Pricing Prospectus and the Prospectus are based on or derived from sources that the Company believes to be reliable and accurate and, to the extent required, the Company has obtained the written consent to the use of such data from such sources where applicable;

(xxx)The Company and its subsidiaries are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as are prudent and customary in the business in which it is engaged; and the Company has no reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business;

(xxxi)The Company and its subsidiaries have filed all foreign, federal, state and local tax returns that are required to be filed or have obtained or requested extensions thereof, except where the failure so to file would not, individually or in the aggregate, result in a Material Adverse Effect, and has paid all taxes (including, without limitation, any estimated taxes) required to be paid and any other assessment, fine or penalty, to the extent that any of the foregoing is due and payable, except for any such tax, assessment, fine or penalty that is currently being contested in good faith by appropriate actions and for which adequate reserves have been established in accordance with GAAP and except for such taxes, assessments, fines or penalties the nonpayment of which would not, individually or in the aggregate, result in a Material Adverse Effect;

(xxxii)The Company and its subsidiaries have no off-balance sheet arrangements (as defined in Regulation S‑K Item 303(a)(4)(ii)) that may have a material current or future effect on the Company’s financial condition, changes in financial condition, results of operations, liquidity, capital expenditures or capital resources, except as disclosed in the Registration Statement, the Pricing Prospectus and the Prospectus;

(xxxiii)The Company has not sold or issued any shares of Stock during the six-month period preceding the date of the Prospectus, including any sales pursuant to Rule 144A or Regulation D of the Act, other than (i) shares issued pursuant to employee benefit plans, stock option plans or other employee compensation plans or pursuant to outstanding options, rights or warrants, or (ii) as disclosed in the Pricing Prospectus and the Prospectus;

(xxxiv)The Company has not and, to its knowledge, no one acting on its behalf has, (i) taken and will not take, directly or indirectly, any action which is designed to or which has constituted or which would reasonably be expected to cause or result in stabilization or manipulation of the price of any security of the Company or any of its subsidiaries to facilitate the sale or resale of the Shares or result in a violation of Regulation M under the Exchange Act, (ii) sold, bid for, purchased, or paid anyone any compensation for soliciting purchases of, the Shares, or (iii) paid or agreed to pay to any person any compensation for soliciting another to purchase any other securities of the Company or any of its subsidiaries other than as contemplated in this Agreement;

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(xxxv)There are no relationships or related-party transactions involving the Company, any of the subsidiaries or consolidated affiliated entities, or any other person required to be described in the Registration Statement, the Pricing Prospectus and the Prospectus which have not been described as required;

(xxxvi)No material labor dispute with the employees of the Company or any of its subsidiaries exists or, to the knowledge of the Company, is threatened, that would, individually or in the aggregate, have a Material Adverse Effect;

(xxxvii)Except as described in the Pricing Prospectus and the Prospectus, there are no contracts, agreements or understandings between the Company and any person that would give rise to a valid claim against the Company or any Underwriter for a brokerage commission, finder’s fee or other like payment in connection with this offering;

(xxxviii)The offering, sale and delivery of the Shares as described in each of the Registration Statement, the Pricing Prospectus and the Prospectus will not violate Regulation T, U or X of the Board of Governors of the Federal Reserve System or any other regulation of such Board of Governors;

(xxxix)There are no debt securities or preferred stock of, or guaranteed by, the Company that are rated by a “nationally recognized statistical rating organization,” as such term is defined in Section 3(a)(62) of the Exchange Act.

(xl)No forward-looking statement (within the meaning of Section 27A of the Act and Section 21E of the Exchange Act) contained in the Registration Statement, the Pricing Prospectus or the Prospectus has been made or reaffirmed by the Company without a reasonable basis or has been disclosed by the Company other than in good faith;

(xli)Each of the Company and its subsidiaries possesses all licenses, certificates, authorizations and permits issued by, and has made all declarations and filings with, the appropriate federal, state or foreign regulatory agencies or bodies which are necessary for the ownership of its properties or the conduct of its businesses as presently conducted, except where failure to have such licenses, certificates, authorizations and permits would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect. None of the Company or its subsidiaries have received notification of any revocation or modification of any such license, certificate, authorization or permit or currently intend to not renew any such license, certificate, authorization or permit which, if subject to an unfavorable decision, ruling or finding would reasonably be expected to have a Material Adverse Effect;

(xlii)the Company and its subsidiaries own, possess or can acquire on commercially reasonable terms adequate rights to use all patents, patent applications, trademarks, service marks, trade names, trademark registrations, service mark registrations, copyrights, licenses, know-how, software, systems and technology (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures) necessary for the conduct of their businesses in the manner and subject to such qualifications described in the Pricing Prospectus and have no reason to believe that the conduct of their business will conflict with, and the Company and its subsidiaries have not received any notice of any claim of conflict with, any such rights of others; and

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(xliii)The interactive data in eXtensible Business Reporting Language incorporated by reference in the Pricing Prospectus and the Prospectus fairly presents the information called for in all material respects and has been prepared in accordance with the Commission’s rules and guidelines applicable thereto.

(b)Each of the Selling Stockholders severally represents and warrants to, and agrees with, each of the Underwriters and the Company that:

(i)All consents, approvals, authorizations and orders necessary for the execution and delivery by such Selling Stockholder of this Agreement, and for the sale and delivery of the Shares to be sold by such Selling Stockholder hereunder, have been obtained; and such Selling Stockholder has full right, power and authority to enter into this Agreement, and to sell, assign, transfer and deliver the Shares to be sold by such Selling Stockholder hereunder;

(ii)The sale of the Shares to be sold by such Selling Stockholder hereunder and the compliance by such Selling Stockholder with this Agreement and the consummation of the transactions herein contemplated will not (A) conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any statute, indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which such Selling Stockholder is a party or by which such Selling Stockholder is bound or to which any of the property or assets of such Selling Stockholder is subject, (B) result in any violation of the provisions of the Selling Stockholders’ Organizational Documents, or (C) result in the violation of any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over such Selling Stockholder or any of its subsidiaries or any property or assets of such Selling Stockholder, except for such conflicts, breaches, violations defaults, in the case of clause (A) as would not reasonably be expected to impair in any material respect the ability of such Selling Stockholder to perform its obligations under this Agreement; and no consent, approval, authorization, order, registration or qualification of or with any such court or governmental body or agency is required for the performance by such Selling Stockholder of its obligations under this Agreement and the consummation by such Selling Stockholder of the transactions contemplated by this Agreement in connection with the Shares to be sold by such Selling Stockholder hereunder, except the registration under the Act of the Shares, and such consents, approvals, authorizations, orders, registrations or qualifications as may be required under state securities or Blue Sky laws in connection with the purchase and distribution of the Shares by the Underwriters;

(iii)Such Selling Stockholder has, and immediately prior to each Time of Delivery such Selling Stockholder will have, good and valid title to the Shares to be sold by such Selling Stockholder hereunder at such Time of Delivery, free and clear of all Liens; and, upon delivery of such Shares and payment therefor pursuant hereto, good and valid title to such Shares, free and clear of all Liens, will pass to the several Underwriters;

(iv)On or prior to the date of the Pricing Prospectus, such Selling Stockholder has executed and delivered to the Underwriters a lock-up agreement substantially in the form of Annex II hereto;

(v)Such Selling Stockholder has not taken and will not take, directly or indirectly, any action that is designed to or that has constituted or might reasonably be expected to cause or result in stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares;

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(vi)To the extent that any statements or omissions made in the Registration Statement, any Preliminary Prospectus, the Prospectus or any amendment or supplement thereto are made in reliance upon and in conformity with written information furnished to the Company by such Selling Stockholder pursuant to Items 7 and 11(m) of Form S‑1 expressly for use therein, such Registration Statement and Preliminary Prospectus did, and the Prospectus and any further amendments or supplements to the Registration Statement and the Prospectus will, when they become effective or are filed with the Commission, as the case may be, conform in all material respects to the requirements of the Act and the rules and regulations of the Commission thereunder and not contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading, it being understood and agreed that the only such information furnished by such Selling Stockholder consists of (A) the legal name, address and the number of shares of Common Stock owned by such Selling Stockholder and (B) the other information with respect to such Selling Stockholder (excluding percentages) which appear in the table (and corresponding footnotes) under the caption “Selling Shareholders” (with respect to each Selling Stockholder, the “Selling Stockholder Information”);

(vii)In order to document the Underwriters’ compliance with the reporting and withholding provisions of the Tax Equity and Fiscal Responsibility Act of 1982 with respect to the transactions herein contemplated, such Selling Stockholder will deliver to you prior to or at the First Time of Delivery (as defined in Section 4 hereof) a properly completed and executed United States Treasury Department Form W‑9 (or other applicable form or statement specified by Treasury Department regulations in lieu thereof);

(viii)Such Selling Stockholder is not prompted by any material non-public information concerning the Company or any of its subsidiaries that is not disclosed in the Pricing Prospectus to sell its Shares pursuant to this Agreement;

(ix)Such Selling Stockholder has not, nor any of its subsidiaries nor, to the knowledge of such Selling Stockholder, any director, officer, agent, employee, affiliate or other person associated with or acting on behalf of such Selling Stockholder or any of its subsidiaries (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (ii) made or taken an act in furtherance of an offer, promise or authorization of any direct or indirect unlawful payment to any foreign or domestic government official or employee from corporate funds, including of any government-owned or controlled entity or of a public international organization, or any person acting in an official capacity for or on behalf of the foregoing, or any political party, party official or candidate for political office; (iii) violated or is in violation of any provision of the FCPA, the UK Bribery Act, any applicable law or regulation implementing the OECD Anti-Bribery Convention or any other applicable anti-bribery or anti-corruption law; or (iv) made any bribe, rebate, payoff, influence payment, kickback or other unlawful payment, or offered, agreed, requested or promised to make any such payment or taken an act in furtherance of any unlawful bribe or other unlawful benefit, including, without limitation, any rebate, payoff, influence, benefit, kickback or other unlawful or improper payment or benefit;

(x)Such Selling Stockholder and its subsidiaries have conducted their businesses at all times in compliance with applicable financial recordkeeping and reporting requirements of the Money Laundering Laws and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving such Selling Stockholder

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or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Selling Stockholder, threatened;

(xi)Such Selling Stockholder represents and warrants that it is not (1) an employee benefit plan subject to Title I of ERISA, (2) a plan or account subject to Section 4975 of the Code or (3) an entity deemed to hold “plan assets” of any such plan or account under Section 3(42) of ERISA, 29 C.F.R. 2510.3-101, or otherwise; and

(xii)(A) Such Selling Stockholder is currently not, nor any of its subsidiaries nor, to the knowledge of such Selling Stockholder, any director, officer, agent, employee, affiliate or other person associated with or acting on behalf of such Selling Stockholder or any of its subsidiaries (i) the subject or the target of any Sanctions, (ii) located, organized or resident in any country or territory that is the subject or target of Sanctions nor does any business with or involving the government of, or any person or project located in, any country targeted by any Sanctions or (iii) supports or facilitates any such business or project; (B) such Selling Stockholder is not controlled (within the meaning of the executive orders or regulations promulgating Sanctions) by any government or person that is the subject or target of Sanctions; (C) such Selling Stockholder will not directly or indirectly use the proceeds of the offering of the Shares hereunder, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity (i) to fund or facilitate any activities of or business with any person, or in any country or territory, that, at the time of such funding, is the subject or target of Sanctions or (ii) in any other manner that will result in a violation by any person (including any person participating in the transaction, whether as underwriter, advisor, investor or otherwise) of Sanctions; and (D) such Selling Stockholder has implemented and maintains adequate internal controls and procedures to monitor and audit transactions that are reasonably designed to detect and prevent any use of the proceeds from the offering of the Shares hereunder or any other action that is inconsistent with any of such Selling Stockholder’s representations and obligations under this paragraph. For the past five years, such Selling Stockholder and its subsidiaries have not knowingly engaged in and are not now knowingly engaged in any dealings or transactions with any person that at the time of the dealing or transaction is or was the subject or target of, or in any country or territory that is the subject or target of, Sanctions.

2.Subject to the terms and conditions herein set forth, (a) each of the Selling Stockholders agrees, severally and not jointly, to sell to each of the Underwriters, and each of the Underwriters agrees, severally and not jointly, to purchase from each of the Selling Stockholders, at a purchase price per share of $[•], the number of Firm Shares (to be adjusted by you so as to eliminate fractional shares) determined by multiplying the aggregate number of Firm Shares to be sold by each of the Selling Stockholders as set forth opposite their respective names in Schedule II hereto by a fraction, the numerator of which is the aggregate number of Firm Shares to be purchased by such Underwriter as set forth opposite the name of such Underwriter in Schedule I hereto and the denominator of which is the aggregate number of Firm Shares to be purchased by all of the Underwriters from all of the Selling Stockholders hereunder and (b) in the event and to the extent that Goldman Sachs & Co. LLC shall exercise the election to purchase Optional Shares as provided below, the Selling Stockholders, as and to the extent indicated in Schedule II hereto agree, severally and not jointly, to sell to Goldman Sachs & Co. LLC, and Goldman Sachs & Co. LLC agrees to purchase from each of the Selling Stockholders, at the purchase price per share set forth in clause (a) of this Section 2, the number of Optional Shares as to which such election shall have been exercised.

The Selling Stockholders, as and to the extent indicated in Schedule II hereto, hereby grant to Goldman Sachs & Co. LLC the right to purchase at its election up to 1,500,000 Optional Shares, at the purchase price

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per share set forth in the paragraph above, for the sole purpose of covering sales of shares in excess of the number of Firm Shares, provided that the purchase price per Optional Share shall be reduced by an amount per share equal to any dividends or distributions declared by the Company and payable on the Firm Shares but not payable on the Optional Shares. Any such election to purchase Optional Shares may be exercised only by written notice from Goldman Sachs & Co. LLC to the Selling Stockholders, given within a period of 30 calendar days after the date of this Agreement and setting forth the aggregate number of Optional Shares to be purchased and the date on which such Optional Shares are to be delivered, as determined by Goldman Sachs & Co. LLC but in no event earlier than the First Time of Delivery or, unless Goldman Sachs & Co. LLC and the Selling Stockholders otherwise agree in writing, earlier than two or later than ten business days after the date of such notice.

3.Upon the authorization by you of the release of the Firm Shares, the several Underwriters propose to offer the Firm Shares for sale upon the terms and conditions set forth in the Prospectus.

4.(a)    The Shares to be purchased by each Underwriter hereunder, in definitive form, and in such authorized denominations and registered in such names as you may request upon at least forty-eight hours’ prior notice to the Company and the Selling Stockholders shall be delivered by or on behalf of the Selling Stockholders to you, through the facilities of the Depository Trust Company (“DTC”), for the account of such Underwriter, against payment by or on behalf of such Underwriter of the purchase price therefor by wire transfer of federal (same-day) funds to the accounts specified by the Selling Stockholders to you at least forty-eight hours in advance. The Company and the Selling Stockholders will cause the certificates representing the Shares to be made available for checking and packaging at least twenty-four hours prior to the Time of Delivery with respect thereto at the office of DTC or its designated custodian (the “Designated Office”). The time and date of such delivery and payment shall be, with respect to the Firm Shares, [•] a.m., New York time, on [•], 2017 or such other time and date as you and the Selling Stockholders may agree upon in writing, and, with respect to the Optional Shares, [•] a.m., New York time, on the date specified by Goldman Sachs & Co. LLC in each written notice given by Goldman Sachs & Co. LLC of its election to purchase such Optional Shares, or such other time and date as Goldman Sachs & Co. LLC and the Selling Stockholders may agree upon in writing. Such time and date for delivery of the Firm Shares is herein called the “First Time of Delivery”, each such time and date for delivery of the Optional Shares, if not the First Time of Delivery, is herein called the “Second Time of Delivery”, and each such time and date for delivery is herein called a “Time of Delivery”.

(b)The documents to be delivered at each Time of Delivery by or on behalf of the parties hereto pursuant to Section 8 hereof, including the cross receipt for the Shares and any additional documents requested by the Underwriters pursuant to Section 8(j) hereof will be delivered at the offices of Vinson & Elkins L.L.P., 1001 Fannin Street, Suite 2500, Houston, Texas 77002 (the “Closing Location”), and the Shares will be delivered at the Designated Office, all at such Time of Delivery. A meeting will be held at the Closing Location at 4 p.m., New York City time, on the New York Business Day next preceding such Time of Delivery, at which meeting the final drafts of the documents to be delivered pursuant to the preceding sentence will be available for review by the parties hereto. For the purposes of this Section 4, “New York Business Day” shall mean each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in New York are generally authorized or obligated by law or executive order to close.

5.The Company agrees with each of the Underwriters:

(a)To prepare the Prospectus in a form approved by you and to file such Prospectus pursuant to Rule 424(b) under the Act not later than the Commission’s close of business on the second business day following the execution and delivery of this Agreement, or, if applicable, such earlier time as may be required by Rule 430A(a)(3) under the Act; to make no further amendment or any

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supplement to the Registration Statement or the Prospectus prior to the last Time of Delivery that has been disapproved by you promptly after reasonable notice thereof; to advise you, promptly after it receives notice thereof, of the time when any amendment to the Registration Statement has been filed or becomes effective or any amendment or supplement to the Prospectus has been filed and to furnish you with copies thereof; to file promptly all material required to be filed by the Company with the Commission pursuant to Rule 433(d) under the Act; to advise you, promptly after it receives notice thereof, of the issuance by the Commission of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or other prospectus in respect of the Shares, of the suspension of the qualification of the Shares for offering or sale in any jurisdiction, of the initiation or threatening of any proceeding for any such purpose, or of any request by the Commission for the amending or supplementing of the Registration Statement or the Prospectus or for additional information; and, in the event of the issuance of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or other prospectus or suspending any such qualification, to promptly use its best efforts to obtain the withdrawal of such order;

(b)Promptly from time to time to take such action as you may reasonably request to qualify the Shares for offering and sale under the securities laws of such jurisdictions as you may request and to comply with such laws so as to permit the continuance of sales and dealings therein in such jurisdictions for as long as may be necessary to complete the distribution of the Shares, provided that in connection therewith the Company shall not be required to qualify as a foreign corporation or to file a general consent to service of process in any jurisdiction;

(c)Prior to 10:00 a.m., New York City time, on the New York Business Day next succeeding the date of this Agreement and from time to time, to furnish the Underwriters with written and electronic copies of the Prospectus in New York City in such quantities as you may reasonably request, and, if the delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) is required at any time prior to the expiration of nine months after the time of issue of the Prospectus in connection with the offering or sale of the Shares and if at such time any event shall have occurred as a result of which the Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) is delivered, not misleading, or, if for any other reason it shall be necessary during such same period to amend or supplement the Prospectus in order to comply with the Act, to notify you and upon your request to prepare and furnish without charge to each Underwriter and to any dealer in securities as many written and electronic copies as you may from time to time reasonably request of an amended Prospectus or a supplement to the Prospectus which will correct such statement or omission or effect such compliance; and in case any Underwriter is required to deliver a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) in connection with sales of any of the Shares at any time nine months or more after the time of issue of the Prospectus, upon your request but at the expense of such Underwriter, to prepare and deliver to such Underwriter as many written and electronic copies as you may request of an amended or supplemented Prospectus complying with Section 10(a)(3) of the Act;

(d)To make generally available to its securityholders as soon as practicable, but in any event not later than sixteen months after the effective date of the Registration Statement (as defined in Rule 158(c) under the Act), an earnings statement of the Company and its subsidiaries (which need not be audited) complying with Section 11(a) of the Act and the rules and regulations of the Commission thereunder (including, at the option of the Company, Rule 158 under the Act);

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(e)During the period beginning from the date hereof and continuing to and including the date 90 days after the date of the Prospectus (the “Company Lock-Up Period”), not to (i) offer, sell, contract to sell, pledge, grant any option to purchase, make any short sale or otherwise transfer or dispose of, directly or indirectly, or file with the Commission a registration statement under the Act relating to, any securities of the Company that are substantially similar to the Shares, including but not limited to any options or warrants to purchase shares of Stock or any securities that are convertible into or exchangeable for, or that represent the right to receive, Stock or any such substantially similar securities, or publicly disclose the intention to make any offer, sale, pledge, disposition or filing or (ii) enter into any swap or other agreement that transfers, in whole or in part, any of the economic consequences of ownership of the Stock or any such other securities, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of Stock or such other securities, in cash or otherwise ((other than (A) any Shares to be sold hereunder, (B) pursuant to the Company’s stock option plan existing on, or upon the conversion or exchange of convertible or exchangeable securities outstanding as of, the date of this Agreement, (C) the issuance by the Company of Stock or securities convertible into, exchangeable for or representing the right to receive Stock in connection with the acquisition by the Company or any of its subsidiaries of the securities, business, technology, property or other assets of another person or entity or pursuant to an employee benefit plan assumed by the Company in connection with any such acquisition or (D) the filing of any registration statement on Form S‑8 relating to securities granted or to be granted pursuant to the Company’s equity incentive plans that are described in the Pricing Prospectus or any assumed employee benefit plan contemplated by clause (C); provided that the aggregate number of shares of Stock that the Company may sell or issue or agree to sell or issue pursuant to clause (C) shall not exceed 10% of the total number of shares of Stock of the Company outstanding immediately following the completion of the transactions contemplated by this Agreement; and, provided, further, that in the case of clause (C) each recipient of such securities shall execute and deliver to the Representative, on or prior to the issuance of such securities, a lock-up agreement substantially to the effect as set forth in Annex II hereto)), in each case, without the prior written consent of Goldman Sachs & Co. LLC;

(f)To furnish to its stockholders as soon as practicable after the end of each fiscal year an annual report (including a balance sheet and statements of income, stockholders’ equity and cash flows of the Company and its consolidated subsidiaries certified by independent public accountants) and, as soon as practicable after the end of each of the first three quarters of each fiscal year (beginning with the fiscal quarter ending after the effective date of the Registration Statement), to make available to its stockholders consolidated summary financial information of the Company and its subsidiaries for such quarter in reasonable detail;

(g)During a period of three years from the effective date of the Registration Statement, to furnish to you copies of all reports or other communications (financial or other) furnished to stockholders, and to deliver to you (i) as soon as they are available, copies of any reports and financial statements furnished to or filed with the Commission or any national securities exchange on which any class of securities of the Company is listed; and (ii) such additional information concerning the business and financial condition of the Company as you may from time to time reasonably request (such financial statements to be on a consolidated basis to the extent the accounts of the Company and its subsidiaries are consolidated in reports furnished to its stockholders generally or to the Commission);

(h)To file with the Commission such information on Form 10‑Q or Form 10‑K as may be required by Rule 463 under the Act;

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(i)If the Company elects to rely upon Rule 462(b) under the Act (“Rule 462(b)”), the Company shall file a Rule 462(b) Registration Statement with the Commission in compliance with Rule 462(b) by 10:00 p.m., Washington, D.C. time, on the date of this Agreement, and the Company shall at the time of filing either pay to the Commission the filing fee for the Rule 462(b) Registration Statement or give irrevocable instructions for the payment of such fee pursuant to Rule 3a(c) of the Commission’s Informal and Other Procedures (16 CFR 202.3a);

(j)Upon request of any Underwriter, to furnish, or cause to be furnished, to such Underwriter an electronic version of the Company’s trademarks, servicemarks and corporate logo for use on the website, if any, operated by such Underwriter for the purpose of facilitating the on-line offering of the Shares (the “License”); provided, however, that the License shall be used solely for the purpose described above, is granted without any fee and may not be assigned or transferred; and

(k)To promptly notify you if the Company ceases to be an Emerging Growth Company at any time prior to the later of (i) completion of the distribution of the Shares within the meaning of the Act and (ii) completion of the 90-day restricted period referred to in Section 5(e) hereof.

6.(a)    The Company represents and agrees that, without the prior consent of the Representative, it has not made and will not make any offer relating to the Shares that would constitute a “free writing prospectus” as defined in Rule 405 under the Act; each Selling Stockholder represents and agrees that, without the prior consent of the Company and the Representative, it has not made and will not make any offer relating to the Shares that would constitute a “free writing prospectus”; and each Underwriter represents and agrees that, without the prior consent of the Company and the Representative, it has not made and will not make any offer relating to the Shares that would constitute a “free writing prospectus”; any such free writing prospectus the use of which has been consented to by the Company and the Representative is listed on Schedule III(a) hereto;

(b)The Company represents and agrees that (i) it has not engaged in, or authorized any other person to engage in, any Section 5(d) Communications, other than Section 5(d) Communications with the prior consent of the Representative with entities that are qualified institutional buyers as defined in Rule 144A under the Act or institutions that are accredited investors as defined in Rule 501(a) under the Act; and (ii) it has not distributed, or authorized any other person to distribute, any Section 5(d) Communications that are written communications within the meaning of Rule 405 under the Act (“Section 5(d) Writings”), other than those distributed with the prior consent of the Representative that are listed on Schedule III(b) hereto; and the Company reconfirms that the Underwriters have been authorized to act on its behalf in engaging in Section 5(d) Communications;

(c)The Company has complied and will comply with the requirements of Rule 433 under the Act applicable to any Issuer Free Writing Prospectus, including timely filing with the Commission or retention where required and legending; and the Company represents that it has satisfied and agrees that it will satisfy the conditions under Rule 433 under the Act to avoid a requirement to file with the Commission any electronic road show;

(d)The Company agrees that if at any time following issuance of an Issuer Free Writing Prospectus or Section 5(d) Writing any event occurred or occurs as a result of which such Issuer Free Writing Prospectus or Section 5(d) Writing would conflict with the information in the Registration Statement, the Pricing Prospectus or the Prospectus or would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances then prevailing, not misleading, the Company will give prompt notice thereof to the Representative and, if

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requested by the Representative, will prepare and furnish without charge to each Underwriter an Issuer Free Writing Prospectus, Section 5(d) Writing or other document which will correct such conflict, statement or omission; provided, however, that this representation and warranty shall not apply to any statements or omissions in an Issuer Free Writing Prospectus made in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter through the Representative expressly for use therein.

7.The Company and each of the Selling Stockholders covenant and agree with one another and with the several Underwriters that (a) the Company will pay or cause to be paid the following: (i) the fees, disbursements and expenses of the Company’s counsel and accountants in connection with the registration of the Shares under the Act and all other expenses in connection with the preparation, printing, reproduction and filing of the Registration Statement, any Preliminary Prospectus, any Issuer Free Writing Prospectus and the Prospectus and amendments and supplements thereto and the mailing and delivering of copies thereof to the Underwriters and dealers; (ii) the cost of printing or producing any agreement among Underwriters, this Agreement, the Blue Sky Memorandum, closing documents (including any compilations thereof) and any other documents in connection with the offering, purchase, sale and delivery of the Shares; (iii) all expenses in connection with the qualification of the Shares for offering and sale under state securities laws as provided in Section 5(b) hereof, including the fees and disbursements of counsel for the Underwriters in connection with such qualification and in connection with the Blue Sky survey; (iv) all fees and expenses in connection with any listing of the Shares on the New York Stock Exchange (the “Exchange”); and (v) the filing fees incident to, and the fees and disbursements of counsel for the Underwriters in connection with, any required review by the Financial Industry Regulatory Authority (“FINRA”) of the terms of the sale of the Shares (up to $[•]); (b) the Company will pay or cause to be paid: (i) the cost of preparing stock certificates; if applicable, (ii) the cost and charges of any transfer agent or registrar, and (iii) all other costs and expenses incident to the performance of its obligations hereunder which are not otherwise specifically provided for in this Section; and (c) such Selling Stockholder will pay or cause to be paid all costs and expenses incident to the performance of such Selling Stockholder’s obligations hereunder which are not otherwise specifically provided for in this Section, including (i) any fees and expenses of counsel for such Selling Stockholder, and (ii) all expenses and taxes incident to the sale and delivery of the Shares to be sold by such Selling Stockholder to the Underwriters hereunder. In connection with clause (c)(ii) of the preceding sentence, Goldman Sachs & Co. LLC agrees to pay New York State stock transfer tax, and the Selling Stockholder agrees to reimburse Goldman Sachs & Co. LLC for associated carrying costs if such tax payment is not rebated on the day of payment and for any portion of such tax payment not rebated. It is understood, however, that the Company shall bear, and the Selling Stockholders shall not be required to pay or to reimburse the Company for, the cost of any other matters not directly relating to the sale and purchase of the Shares pursuant to this Agreement, and that, except as provided in this Section, and Sections 9 and 12 hereof, the Underwriters will pay all of their own costs and expenses, including the fees of their counsel, stock transfer taxes on resale of any of the Shares by them, and any advertising expenses connected with any offers they may make and that the Underwriters shall be responsible for 50% of the cost of any chartered plane, jet, private aircraft, other aircraft or other transportation chartered in connection with any “road show” presentation to investors undertaken in connection with the offering.

8.The obligations of the Underwriters hereunder, as to the Shares to be delivered at each Time of Delivery, shall be subject, in their discretion, to the condition that all representations and warranties and other statements of the Company and the Selling Stockholders herein are, at and as of such Time of Delivery, true and correct, the condition that the Company and the Selling Stockholders shall have performed all of its and their obligations hereunder theretofore to be performed, and the following additional conditions:

(a)The Prospectus shall have been filed with the Commission pursuant to Rule 424(b) under the Act within the applicable time period prescribed for such filing by the rules and regulations

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under the Act and in accordance with Section 5(a) hereof; all material required to be filed by the Company pursuant to Rule 433(d) under the Act shall have been filed with the Commission within the applicable time period prescribed for such filing by Rule 433 under the Act; if the Company has elected to rely upon Rule 462(b) under the Act, the Rule 462(b) Registration Statement shall have become effective by 10:00 p.m., Washington, D.C. time, on the date of this Agreement; no stop order suspending the effectiveness of the Registration Statement or any part thereof shall have been issued and no proceeding for that purpose shall have been initiated or threatened by the Commission no stop order suspending or preventing the use of the Prospectus or any Issuer Free Writing Prospectus shall have been initiated or threatened by the Commission; and all requests for additional information on the part of the Commission shall have been complied with to your reasonable satisfaction;

(b)Vinson & Elkins L.L.P., counsel for the Underwriters, shall have furnished to you such written opinion or opinions (a form of such opinion is attached as Annex I(a) hereto), dated such Time of Delivery, in form and substance satisfactory to you, with respect to the matters as you may reasonably request, and such counsel shall have received such papers and information as they may reasonably request to enable them to pass upon such matters;

(c)Latham & Watkins LLP, counsel for the Company, shall have furnished to you their written opinion, substantially in the form attached as Annex I(b) hereto, dated such Time of Delivery;

(d)The respective counsel for each of the Selling Stockholders, as indicated in Schedule II hereto, each shall have furnished to you their written opinion with respect to each of the Selling Stockholders for whom they are acting as counsel, substantially in the form attached as Annex I(c) hereto, dated such Time of Delivery;

(e)On the date of the Prospectus at a time prior to the execution of this Agreement, at 9:30 a.m., New York City time, on the effective date of any post-effective amendment to the Registration Statement filed subsequent to the date of this Agreement and also at each Time of Delivery, Deloitte shall have furnished to you a letter or letters, dated the respective dates of delivery thereof, in form and substance satisfactory to you;

(f)(i) Neither the Company nor any of its subsidiaries shall have sustained since the date of the latest audited financial statements included in the Pricing Prospectus any loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, otherwise than as set forth or contemplated in the Pricing Prospectus, and (ii) since the respective dates as of which information is given in the Pricing Prospectus there shall not have been any change in the capital stock or long-term debt of the Company or any of its subsidiaries or any change or any development involving a prospective change, in or affecting the general affairs, management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, otherwise than as set forth or contemplated in the Pricing Prospectus, the effect of which, in any such case described in clause (i) or (ii), is in your judgment so material and adverse as to make it impracticable or inadvisable to proceed with the public offering or the delivery of the Shares being delivered at such Time of Delivery on the terms and in the manner contemplated in the Pricing Prospectus;

(g)On or after the Applicable Time there shall not have occurred any of the following: (i) a suspension or material limitation in trading in securities generally on the Exchange; (ii) a suspension or material limitation in trading in the Company’s securities on the Exchange; (iii) a general moratorium on commercial banking activities declared by either federal or New York or Texas State authorities or a material disruption in commercial banking or securities settlement or clearance

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services in the United States; (iv) the outbreak or escalation of hostilities involving the United States or the declaration by the United States of a national emergency or war; or (v) the occurrence of any other calamity or crisis or any change in financial, political or economic conditions in the United States or elsewhere, if the effect of any such event specified in clause (iv) or (v) in your judgment makes it impracticable or inadvisable to proceed with the public offering or the delivery of the Shares being delivered at such Time of Delivery on the terms and in the manner contemplated in the Prospectus;

(h)The Company shall have obtained and delivered to the Underwriters executed copies of an agreement from each officer, director and stockholder of the Company listed on Schedule IV hereto, substantially to the effect set forth in Annex II hereto in form and substance satisfactory to you;

(i)The Company shall have complied with the provisions of Section 5(c) hereof with respect to the furnishing of prospectuses on the New York Business Day next succeeding the date of this Agreement; and

(j)The Company and the Selling Stockholders shall have furnished or caused to be furnished to you at such Time of Delivery certificates of officers of the Company and of the Selling Stockholders, respectively, satisfactory to you as to the accuracy of the representations and warranties of the Company and the Selling Stockholders, respectively, herein at and as of such Time of Delivery, as to the performance by the Company and the Selling Stockholders of all of their respective obligations hereunder to be performed at or prior to such Time of Delivery, as to such other matters as you may reasonably request, and the Company shall have furnished or caused to be furnished certificates as to the matters set forth in subsections (a) and (f) of this Section 8.

9.(a)    The Company will indemnify and hold harmless each Underwriter against any losses, claims, damages or liabilities, joint or several, to which such Underwriter may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus, any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act, or any Section 5(d) Writing, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, and will reimburse each Underwriter for any legal or other expenses reasonably incurred by such Underwriter in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that the Company shall not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus, or any Section 5(d) Writing, in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representative expressly for use therein, it being understood and agreed that the only such information consists of the following: the information contained in the ninth, tenth and eleventh paragraphs under the caption “Underwriting” in the Preliminary Prospectus.

(b)Each of the Selling Stockholders will, severally and not jointly, indemnify and hold harmless each Underwriter against any losses, claims, damages or liabilities, joint or several, to which such Underwriter may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue

20

statement of a material fact contained in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto or any Issuer Free Writing Prospectus in reliance upon and in conformity with written information furnished to the Company by such Selling Stockholder expressly for use therein, it being understood and agreed that the only such information furnished by any Selling Stockholder consists of the following information: each Selling Stockholder’s name and corresponding share amounts set forth in the table of Selling Shareholders in the Registration Statement and Final Prospectus under the heading “Selling Shareholders” and each Selling Stockholder’s address; and will reimburse each Underwriter for any legal or other expenses reasonably incurred by such Underwriter in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that such Selling Stockholder shall not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus or any amendment or supplement thereto, any Issuer Free Writing Prospectus, or any Section 5(d) Writing, in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representative expressly for use therein. The aggregate liability of each Selling Stockholder under this subsection (b) shall be limited to an amount equal to the aggregate gross proceeds from the offering of such Selling Stockholder’s Shares purchased under this Agreement.

(c)Each Underwriter will indemnify and hold harmless the Company and each Selling Stockholder against any losses, claims, damages or liabilities to which the Company or such Selling Stockholder may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus, or any Section 5(d) Writing, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus, or any Section 5(d) Writing, in reliance upon and in conformity with written information furnished to the Company by such Underwriter through the Representative expressly for use therein, it being understood and agreed that the only such information consists of the following: the information contained in the ninth, tenth and eleventh paragraphs under the caption “Underwriting” in the Preliminary Prospectus, and will reimburse the Company and each Selling Stockholder for any legal or other expenses reasonably incurred by the Company or such Selling Stockholder in connection with investigating or defending any such action or claim as such expenses are incurred.

(d)Promptly after receipt by an indemnified party under subsection (a), (b) or (c) of this Section 9 of notice of the commencement of any action, such indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under such subsection, notify the indemnifying party in writing of the commencement thereof; but the omission so to notify the indemnifying party shall not relieve it from any liability which it may have to any indemnified party otherwise than under such subsection. In case any such action shall be brought against any indemnified party and it shall notify the indemnifying party of the commencement thereof, the indemnifying party shall be entitled to participate therein and, to the extent

21

that it shall wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and, after notice from the indemnifying party to such indemnified party of its election so to assume the defense thereof, the indemnifying party shall not be liable to such indemnified party under such subsection for any legal expenses of other counsel or any other expenses, in each case subsequently incurred by such indemnified party, in connection with the defense thereof other than reasonable costs of investigation. No indemnifying party shall, without the written consent of the indemnified party, effect the settlement or compromise of, or consent to the entry of any judgment with respect to, any pending or threatened action or claim in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified party is an actual or potential party to such action or claim) unless such settlement, compromise or judgment (i) includes an unconditional release of the indemnified party from all liability arising out of such action or claim and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act, by or on behalf of any indemnified party.

(e)If the indemnification provided for in this Section 9 is unavailable to or insufficient to hold harmless an indemnified party under subsection (a), (b) or (c) above in respect of any losses, claims, damages or liabilities (or actions in respect thereof) referred to therein, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities (or actions in respect thereof) in such proportion as is appropriate to reflect the relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other from the offering of the Shares. If, however, the allocation provided by the immediately preceding sentence is not permitted by applicable law or if the indemnified party failed to give the notice required under subsection (d) above, then each indemnifying party shall contribute to such amount paid or payable by such indemnified party in such proportion as is appropriate to reflect not only such relative benefits but also the relative fault of the Company and the Selling Stockholders on the one hand and the Underwriters on the other in connection with the statements or omissions which resulted in such losses, claims, damages or liabilities (or actions in respect thereof), as well as any other relevant equitable considerations. The relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by the Company and the Selling Stockholders bear to the total underwriting discounts and commissions received by the Underwriters, in each case as set forth in the table on the cover page of the Prospectus. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company or the Selling Stockholders on the one hand or the Underwriters on the other and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. Notwithstanding the provisions of this subsection (e), the requirement of each Selling Stockholder to contribute pursuant to this paragraph shall be limited to an amount equal to the Net Proceeds received by such Selling Stockholder less any amounts that such Selling Stockholder is obligated to pay under paragraph (b) above. The Company, each of the Selling Stockholders and the Underwriters agree that it would not be just and equitable if contribution pursuant to this subsection (d) were determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to above in this subsection (e). The amount paid or payable by an indemnified party as a result of the losses, claims, damages or liabilities (or actions in respect thereof) referred to above in this subsection (e) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this subsection (e), no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Shares underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason

22

of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations in this subsection (e) to contribute are several in proportion to their respective underwriting obligations and not joint.

(f)The obligations of the Company and the Selling Stockholders under this Section 9 shall be in addition to any liability which the Company and the Selling Stockholders may otherwise have and shall extend, upon the same terms and conditions, to each officer and director of each Underwriter and each person, if any, who controls any Underwriter within the meaning of the Act and each broker-dealer affiliate of any Underwriter; and the obligations of the Underwriters under this Section 9 shall be in addition to any liability which the respective Underwriters may otherwise have and shall extend, upon the same terms and conditions, to each officer and director of the Company (including any person who, with his or her consent, is named in the Registration Statement as about to become a director of the Company) and to each person, if any, who controls the Company or any Selling Stockholder within the meaning of the Act.

10.(a)    If any Underwriter shall default in its obligation to purchase the Shares that it has agreed to purchase hereunder at a Time of Delivery, you may in your discretion arrange for you or another party or other parties to purchase such Shares on the terms contained herein. If within thirty-six hours after such default by any Underwriter you do not arrange for the purchase of such Shares, then the Selling Stockholders shall be entitled to a further period of thirty-six hours within which to procure another party or other parties satisfactory to you to purchase such Shares on such terms. In the event that, within the respective prescribed periods, you notify the Selling Stockholders that you have so arranged for the purchase of such Shares, or a Selling Stockholder notifies you that it has so arranged for the purchase of such Shares, you or the Selling Stockholders shall have the right to postpone (such) Time of Delivery for a period of not more than seven days, in order to effect whatever changes may thereby be made necessary in the Registration Statement or the Prospectus, or in any other documents or arrangements, and the Company agrees to file promptly any amendments or supplements to the Registration Statement or the Prospectus which in your opinion may thereby be made necessary. The term “Underwriter” as used in this Agreement shall include any person substituted under this Section with like effect as if such person had originally been a party to this Agreement with respect to such Shares.

(b)If, after giving effect to any arrangements for the purchase of the Shares of a defaulting Underwriter or Underwriters by you and the Selling Stockholders as provided in subsection (a) above, the aggregate number of such Shares which remains unpurchased does not exceed one-eleventh of the aggregate number of all the Shares to be purchased at such Time of Delivery, then the Selling Stockholders shall have the right to require each non-defaulting Underwriter to purchase the number of Shares which such Underwriter agreed to purchase hereunder at such Time of Delivery and, in addition, to require each non-defaulting Underwriter to purchase its pro rata share (based on the number of Shares which such Underwriter agreed to purchase hereunder) of the Shares of such defaulting Underwriter or Underwriters for which such arrangements have not been made; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

(c)If, after giving effect to any arrangements for the purchase of the Shares of a defaulting Underwriter or Underwriters by you and the Selling Stockholders as provided in subsection (a) above, the aggregate number of such Shares which remains unpurchased exceeds one-eleventh of the aggregate number of all of the Shares to be purchased at such Time of Delivery, or if the Selling Stockholders shall not exercise the right described in subsection (b) above to require non-defaulting Underwriters to purchase Shares of a defaulting Underwriter or Underwriters, then this Agreement (or, with respect to a Second Time of Delivery, the obligations of Goldman Sachs & Co. LLC to purchase and of the Selling Stockholders to sell the Optional

23

Shares) shall thereupon terminate, without liability on the part of any non-defaulting Underwriter or the Selling Stockholders, except for the expenses to be borne by the Selling Stockholders and the Underwriters as provided in Section 7 hereof and the indemnity and contribution agreements in Section 9 hereof; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

11.The respective indemnities, agreements, representations, warranties and other statements of the Company, the Selling Stockholders and the several Underwriters, as set forth in this Agreement or made by or on behalf of them, respectively, pursuant to this Agreement, shall remain in full force and effect, regardless of any investigation (or any statement as to the results thereof) made by or on behalf of any Underwriter or any controlling person of any Underwriter, or the Company, or any of the Selling Stockholders, or any officer or director or controlling person of the Company, or any controlling person of any Selling Stockholder, and shall survive delivery of and payment for the Shares.

12.If this Agreement shall be terminated pursuant to Section 10 hereof, neither the Company nor the Selling Stockholders shall then be under any liability to any Underwriter except as provided in Sections 7 and 9 hereof; but, if for any other reason any Shares are not delivered by or on behalf of the Company and the Selling Stockholders as provided herein, the Company and each of the Selling Stockholders pro rata (based on the number of Shares to be sold by the Company and such Selling Stockholder hereunder) will reimburse the Underwriters through you for all out-of-pocket expenses approved in writing by you, including fees and disbursements of counsel, reasonably incurred by the Underwriters in making preparations for the purchase, sale and delivery of the Shares not so delivered, but the Company and the Selling Stockholders shall then be under no further liability to any Underwriter except as provided in Sections 7 and 9 hereof.

13.In all dealings hereunder, you shall act on behalf of each of the Underwriters, and the parties hereto shall be entitled to act and rely upon any statement, request, notice or agreement on behalf of any Underwriter made or given by you as the Representative; and in all dealings with any Selling Stockholder hereunder, you and the Company shall be entitled to act and rely upon any statement, request, notice or agreement on behalf of such Selling Stockholder made or given by any or all of the Attorneys-in-Fact for such Selling Stockholder.

In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107‑56 (signed into law October 26, 2001)), the Underwriters are required to obtain, verify and record information that identifies their respective clients, including the Company and the Selling Stockholders, which information may include the name and address of their respective clients, as well as other information that will allow the Underwriters to properly identify their respective clients.

All statements, requests, notices and agreements hereunder shall be in writing, and if to the Underwriters shall be delivered or sent by mail, telex or facsimile transmission to Goldman Sachs & Co. LLC, 200 West Street, New York, New York 10282, Attention: Registration Department; if to any Selling Stockholder shall be delivered or sent by mail, telex or facsimile transmission to counsel for such Selling Stockholder at its address set forth in Schedule IV hereto; if to the Company shall be delivered or sent by mail, telex or facsimile transmission to the address of the Company set forth on the cover of the Registration Statement, Attention: Secretary; and if to any stockholder that has delivered a lock-up letter described in Section 8(h) hereof shall be delivered or sent by mail to his or her respective address provided in Schedule IV hereto or such other address as such stockholder provides in writing to the Company; provided, however, that any notice to an Underwriter pursuant to Section 9(d) hereof shall be delivered or sent by mail, telex or facsimile transmission to such Underwriter at its address set forth in its Underwriters’ Questionnaire or telex constituting such Questionnaire, which address will be supplied to the Company or the Selling Stockholders by you on request; provided further that notices under subsection 5(e) shall be in writing, and if to the Underwriters shall be delivered or sent by mail, telex or facsimile transmission to you as the representative

24

at Goldman Sachs & Co. LLC, 200 West Street, New York, New York 10282, Attention: Control Room. Any such statements, requests, notices or agreements shall take effect upon receipt thereof.

14.This Agreement shall be binding upon, and inure solely to the benefit of, the Underwriters, the Company and the Selling Stockholders and, to the extent provided in Sections 9 and 11 hereof, the officers and directors of the Company and each person who controls the Company, any Selling Stockholder or any Underwriter, and their respective heirs, executors, administrators, successors and assigns, and no other person shall acquire or have any right under or by virtue of this Agreement. No purchaser of any of the Shares from any Underwriter shall be deemed a successor or assign by reason merely of such purchase.

15.Time shall be of the essence of this Agreement. As used herein, the term “business day” shall mean any day when the Commission’s office in Washington, D.C. is open for business.

16.The Company and the Selling Stockholders acknowledge and agree that (i) the purchase and sale of the Shares pursuant to this Agreement is an arm’s-length commercial transaction between the Company and the Selling Stockholders, on the one hand, and the several Underwriters, on the other, (ii) in connection therewith and with the process leading to such transaction each Underwriter is acting solely as a principal and not the agent or fiduciary of the Company or any Selling Stockholder, (iii) no Underwriter has assumed an advisory or fiduciary responsibility in favor of the Company or any Selling Stockholder with respect to the offering contemplated hereby or the process leading thereto (irrespective of whether such Underwriter has advised or is currently advising the Company or any Selling Stockholder on other matters) or any other obligation to the Company or any Selling Stockholder except the obligations expressly set forth in this Agreement, and (iv) the Company and each Selling Stockholder has consulted its own legal and financial advisors to the extent it deemed appropriate. The Company and each Selling Stockholder agrees that it will not claim that the Underwriters, or any of them, has rendered advisory services of any nature or respect, or owes a fiduciary or similar duty to the Company or any Selling Stockholder, in connection with such transaction or the process leading thereto.

17.This Agreement supersedes all prior agreements and understandings (whether written or oral) between the Company, the Selling Stockholders and the Underwriters, or any of them, with respect to the subject matter hereof.

18.THIS AGREEMENT AND ANY MATTERS RELATED TO THIS TRANSACTION SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO PRINCIPLES OF CONFLICT OF LAWS THAT WOULD RESULT IN THE APPLICATION OF ANY LAW OTHER THAN THE LAWS OF THE STATE OF NEW YORK. The Company agrees that any suit or proceeding arising in respect of this agreement or our engagement will be tried exclusively in the U.S. District Court for the Southern District of New York or, if that court does not have subject matter jurisdiction, in any state court located in The City and County of New York, Borough of Manhattan, and the Company agrees to submit to the jurisdiction of, and to venue in, such courts.

19.The Company, each Selling Stockholder and each of the Underwriters hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby.

20.This Agreement may be executed by any one or more of the parties hereto in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute one and the same instrument.

25

21.Notwithstanding anything herein to the contrary, the Company and the Selling Stockholders are authorized to disclose to any persons the U.S. federal and state income tax treatment and tax structure of the potential transaction and all materials of any kind (including tax opinions and other tax analyses) provided to the Company and the Selling Stockholders relating to that treatment and structure, without the Underwriters imposing any limitation of any kind. However, any information relating to the tax treatment and tax structure shall remain confidential (and the foregoing sentence shall not apply) to the extent necessary to enable any person to comply with securities laws. For this purpose, “tax structure” is limited to any facts that may be relevant to that treatment.

If the foregoing is in accordance with your understanding, please sign and return to us one for the Company and the Representative plus one for each counsel and the Selling Stockholders counterparts hereof, and upon the acceptance hereof by you, on behalf of each of the Underwriters, this letter and such acceptance hereof shall constitute a binding agreement among each of the Underwriters, the Company and each of the Selling Stockholders. It is understood that your acceptance of this letter on behalf of each of the Underwriters is pursuant to the authority set forth in a form of agreement among Underwriters, the form of which shall be submitted to the Company and the Selling Stockholders for examination, upon request, but without warranty on your part as to the authority of the signers thereof.

Any person executing and delivering this Agreement as Attorney-in-Fact for a Selling Stockholder represents by so doing that he has been duly appointed as Attorney-in-Fact by such Selling Stockholder pursuant to a validly existing and binding Power of Attorney that authorizes such Attorney-in-Fact to take such action.

[Signature Pages Follow]

26

Very truly yours,
ProPetro Holding Corp
By:
	Name:
	Title:

[Signature Page to Underwriting Agreement]

ENERGY CAPITAL PARTNERS II, LP
By:	Energy Capital Partners GP II, LP, its general partner
By:	Energy Capital Partners II, LLC, its general partner
By:
	Name:
	Title:

[Signature Page to Underwriting Agreement]

ENERGY CAPITAL PARTNERS II-A, LP
By:	Energy Capital Partners GP II, LP, its general partner
By:	Energy Capital Partners II, LLC, its general partner
By:
	Name:
	Title:

[Signature Page to Underwriting Agreement]

ENERGY CAPITAL PARTNERS II-B, LP
By:	Energy Capital Partners GP II, LP, its general partner
By:	Energy Capital Partners II, LLC, its general partner
By:
	Name:
	Title:

[Signature Page to Underwriting Agreement]

ENERGY CAPITAL PARTNERS II-C (DIRECT IP), LP
By:	Energy Capital Partners GP II, LP, its general partner
By:	Energy Capital Partners II, LLC, its general partner
By:
	Name:
	Title:

[Signature Page to Underwriting Agreement]

ENERGY CAPITAL PARTNERS II-D, LP
By:	Energy Capital Partners GP II, LP, its general partner
By:	Energy Capital Partners II, LLC, its general partner
By:
	Name:
	Title:

[Signature Page to Underwriting Agreement]

ENERGY CAPITAL PARTNERS II (MIDLAND CO-INVEST), LP
By:	Energy Capital Partners GP II Co-Investment (Midland), LLC
By:	Energy Capital Partners II, LLC, its sole member
By:
	Name:
	Title:

[Signature Page to Underwriting Agreement]

Accepted as of the date hereof
Goldman Sachs & Co. LLC
By:
	Name:
	Title:

On behalf of each of the Underwriters

[Signature Page to Underwriting Agreement]

SCHEDULE I

Underwriter	Total Number of Firm Shares to be Purchased	Number of Optional Shares to be Purchased if Maximum Option Exercised
Goldman Sachs & Co. LLC		1,500,000
[•].
Total	10,000,000	1,500,000

I-1

SCHEDULE II

	Total Number of Firm Shares to be Sold	Number of Optional Shares to be Sold if Maximum Option Exercised
The Selling Stockholder(s):
Energy Capital Partners II, LP, Energy Capital Partners II-A, LP, Energy Capital Partners II-B, LP, Energy Capital Partners II-C (Direct IP), LP, Energy Capital Partners II-D, LP
Energy Capital Partners II (Midland Co-Invest), LP
Total

II-1

SCHEDULE III

(a) Issuer Free Writing Prospectuses not included in the Pricing Disclosure Package

[•]

(b) Additional documents incorporated by reference

[None]

(c) Information other than the Pricing Prospectus that comprise the Pricing Disclosure Package

The public offering price per share for the Shares is $[•].

The number of Shares purchased by the Underwriters is [•].

III-1

SCHEULD IV

Name of Stockholder	Address
Energy Capital Partners II, LP	51 JFK Parkway, Suite 200, Short Hills, NJ 07078
Energy Capital Partners II-A, LP	51 JFK Parkway, Suite 200, Short Hills, NJ 07078
Energy Capital Partners II-B, LP	51 JFK Parkway, Suite 200, Short Hills, NJ 07078
Energy Capital Partners II-C (Direct IP), LP	51 JFK Parkway, Suite 200, Short Hills, NJ 07078
Energy Capital Partners II-D, LP	51 JFK Parkway, Suite 200, Short Hills, NJ 07078
Energy Capital Partners II (Midland Co-Invest), LP	51 JFK Parkway, Suite 200, Short Hills, NJ 07078
Dale Redman	1706 S. Midkiff, Bldg. B, Midland, TX 79701
David Sledge	1706 S. Midkiff, Bldg. B, Midland, TX 79701
Jeffrey Smith	1706 S. Midkiff, Bldg. B, Midland, TX 79701
Mark Howell	1706 S. Midkiff, Bldg. B, Midland, TX 79701
Ian Denholm	1706 S. Midkiff, Bldg. B, Midland, TX 79701
Spencer D. Armour, III	1706 S. Midkiff, Bldg. B, Midland, TX 79701
Steven Beal	1706 S. Midkiff, Bldg. B, Midland, TX 79701
Schuyler Coppedge	51 JFK Parkway, Suite 200, Short Hills, NJ 07078
Stephen Herman	51 JFK Parkway, Suite 200, Short Hills, NJ 07078
Matthew H. Himler	51 JFK Parkway, Suite 200, Short Hills, NJ 07078
Peter Labbat	51 JFK Parkway, Suite 200, Short Hills, NJ 07078
Alan E. Douglas	1706 S. Midkiff, Bldg. B, Midland, TX 79701
Christopher Leininger	51 JFK Parkway, Suite 200, Short Hills, NJ 07078
Jack B. Moore	1706 S. Midkiff, Bldg. B, Midland, TX 79701

IV-1

ANNEX I(a)

FORM OF OPINION OF

COUNSEL FOR THE UNDERWRITERS

[To be provided to the Underwriters]

Annex I(a)

ANNEX I(b)

FORM OF OPINION OF

COUNSEL FOR THE COMPANY

[To be provided to the Underwriters]

Annex I(b)

ANNEX I(c)

FORM OF OPINION OF

COUNSEL FOR THE SELLING STOCKHOLDERS

[To be provided to the Underwriters]

.

Annex I(c)

ANNEX II

FORM OF LOCK-UP AGREEMENT

PROPETRO HOLDING CORP.

Lock-Up Agreement

[•], 2017

Goldman Sachs & Co. LLC

As representative of the several Underwriters named in Schedule I hereto,

c/o Goldman Sachs & Co. LLC

200 West Street

New York, NY 10282-2198

Re: ProPetro Holding Corp. - Lock-Up Agreement

Ladies and Gentlemen:

The undersigned understands that you, as representative (the “Representative”), propose to enter into an Underwriting Agreement on behalf of the several Underwriters named in Schedule I to such agreement (collectively, the “Underwriters”), with ProPetro Holding Corp., a Delaware corporation (the “Company”), and certain selling stockholders named in Schedule II to such agreement (the “Selling Stockholders”), providing for a public offering of common stock, par value $0.001 per share (the “Stock”) of the Company (the “Shares”) pursuant to a Registration Statement on Form S-1 (the “Registration Statement”) to be filed with the Securities and Exchange Commission (the “SEC”).

In consideration of the agreement by the Underwriters to offer and sell the Shares, and of other good and valuable consideration the receipt and sufficiency of which is hereby acknowledged, the undersigned agrees that, during the period specified in the following paragraph (the “Stockholder Lock-Up Period”), the undersigned will not offer, sell, contract to sell, pledge, grant any option to purchase, make any short sale or otherwise dispose of any shares of Stock of the Company, or any options or warrants to purchase any shares of Stock of the Company, or any securities convertible into, exchangeable for or that represent the right to receive shares of Stock of the Company, whether now owned or hereinafter acquired, owned directly by the undersigned (including holding as a custodian) or with respect to which the undersigned has beneficial ownership within the rules and regulations of the SEC (collectively the “Undersigned's Shares”). The foregoing restriction is expressly agreed to preclude the undersigned from engaging in any hedging or other transaction which is designed to or which reasonably could be expected to lead to or result in a sale or disposition of the Undersigned’s Shares even if such Shares would be disposed of by someone other than the undersigned. Such prohibited hedging or other transactions would include without limitation any short sale or any purchase, sale or grant of any right (including without limitation any put or call option) with respect to any of the Undersigned’s Shares or with respect to any security that includes, relates to, or derives any significant part of its value from such Shares.

The Stockholder Lock-Up Period will commence on the date of this Lock-Up Agreement and continue for 90 days after the public offering date set forth on the final prospectus used to sell the Shares pursuant to the Underwriting Agreement.

Notwithstanding the foregoing, the undersigned may transfer the Undersigned’s Shares (i) pursuant to the terms of the Underwriting Agreement, (ii) as a bona fide gift or gifts, provided that the donee or donees thereof agree

Annex II - Page 1

to be bound in writing by the restrictions set forth herein, (iii) by will or by intestacy, provided that such transferee or transferees thereof agree to be bound in writing by the restrictions set forth herein, (iv) to any trust for the direct or indirect benefit of the undersigned or the immediate family of the undersigned, provided that the trustee of the trust agrees to be bound in writing by the restrictions set forth herein, and provided further that any such transfer shall not involve a disposition for value, (v) for bona fide tax planning purposes, provided that the transferee or transferees agree to be bound in writing by the restrictions set forth herein, (vi) to the undersigned’s direct or indirect affiliates (as defined in Rule 12b-2 of the Securities and Exchange Act of 1934, as amended), including without limitation its direct and indirect stockholders, members, and partners and its direct and indirect subsidiaries, or to any investment fund or other entity controlled or managed by, or under the common control or management with, the undersigned, provided that such affiliate, partner, former partner, member, former member, investment fund or other entity controlled or managed by, or under the common control or management with, the undersigned agrees to be bound in writing by the restrictions set forth herein, or (vii) with the prior written consent of the Representative on behalf of the Underwriters. For purposes of this Lock-Up Agreement, “immediate family” shall mean any relationship by blood, marriage or adoption, not more remote than first cousin. In addition, notwithstanding the foregoing, if the undersigned is a corporation, the corporation may transfer the capital stock of the Company to any wholly-owned subsidiary of such corporation; provided, however, that in any such case, it shall be a condition to the transfer that the transferee execute an agreement stating that the transferee is receiving and holding such capital stock subject to the provisions of this Agreement and there shall be no further transfer of such capital stock except in accordance with this Agreement, and provided further that any such transfer shall not involve a disposition for value. The undersigned now has, and, except as contemplated by clause (i), (ii), (iii), (iv), (v), (vi) or (vii) above, for the duration of this Lock-Up Agreement will have, good and marketable title to the Undersigned’s Shares, free and clear of all liens, encumbrances, and claims whatsoever. The undersigned also agrees and consents to the entry of stop transfer instructions with the Company’s transfer agent and registrar against the transfer of the Undersigned’s Shares except in compliance with the foregoing restrictions. [Add for management: Additionally, the restrictions under this agreement shall not prohibit the sale or disposition of Common Stock to satisfy tax withholding and other obligations in connection with the exercise of stock options awarded under the Long Term Incentive Plan].

The undersigned understands that the Company and the Underwriters are relying upon this Lock-Up Agreement in proceeding toward consummation of the offering. The undersigned further understands that this Lock-Up Agreement is irrevocable and shall be binding upon the undersigned’s heirs, legal representatives, successors, and assigns.

Very truly yours,

Exact Name of Shareholder

Exact Name of Shareholder

Authorized Signature

Title

Annex II - Page 2

EX-5.1

Exhibit 5.1

		811 Main Street, Suite 3700
		Houston, TX 77002
		Tel: +1.713.546.5400 Fax: +1.713.546.5401
		www.lw.com
		FIRM / AFFILIATE OFFICES
		Barcelona	Moscow
		Beijing	Munich
		Boston	New York
		Brussels	Orange County
		Century City	Paris
	November 2, 2017 ProPetro Holding Corp. 1706 S. Midkiff, Bldg. B Midland, Texas 79701	Chicago	Riyadh
		Dubai	Rome
		Düsseldorf	San Diego
		Frankfurt	San Francisco
		Hamburg	Seoul
		Hong Kong	Shanghai
		Houston	Silicon Valley
		London	Singapore
		Los Angeles	Tokyo
		Madrid	Washington, D.C.
		Milan

Re: Registration Statement on Form S-1

Ladies and Gentlemen:

We have acted as special counsel to ProPetro Holding Corp., a Delaware corporation (the “Company”), in connection with the resale from time to time of up to 11,500,000 shares of the Company’s Common Stock, par value $0.001 per share (the “Common Shares”), by certain of the selling stockholders identified in the Registration Statement (as hereinafter defined). The Common Shares are included in a registration statement on Form S-1 under the Securities Act of 1933, as amended (the “Act”), filed with the Securities and Exchange Commission (the “Commission”) on November [—], 2017 (the “Registration Statement”).

This opinion is being furnished in connection with the requirements of Item 601(b)(5) of Regulation S-K under the Act, and no opinion is expressed herein as to any matter pertaining to the contents of the Registration Statement or related prospectus (the “Prospectus”), other than as expressly stated herein with respect to the resale of the Common Shares.

As such counsel, we have examined such matters of fact and questions of law as we have considered appropriate for purposes of this letter. With your consent, we have relied upon certificates and other assurances of officers of the Company and others as to factual matters without having independently verified such factual matters. We are opining herein as to General Corporation Law of the State of Delaware, and we express no opinion with respect to any other laws.

Subject to the foregoing and the other matters set forth herein, it is our opinion that, as of the date hereof, the Common Shares have been duly authorized by all necessary corporate action of the Company, and the Common Shares are validly issued, fully paid and nonassessable.

November 2, 2017

Page 2

This opinion is for your benefit in connection with the Registration Statement and may be relied upon by you and by persons entitled to rely upon it pursuant to the applicable provisions of the Act. We consent to your filing this opinion as an exhibit to the Registration Statement and to the reference to our firm in the Prospectus under the heading “Legal Matters.” In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the Commission thereunder.

Very truly yours,

/s/ Latham & Watkins LLP

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the use in this Registration Statement on Form S-1 of our report dated February 22, 2017 (August 11, 2017 as to the subsequent event disclosures regarding the Initial Public Offering and the conversion of preferred stock to common stock described in Note 1 and Note 18 and as to the effects of the stock split as described in Note 1) relating to the consolidated financial statements of ProPetro Holding Corp. and Subsidiary appearing in the prospectus, which is part of this Registration Statement.

We also consent to the reference to us under the heading "Experts" in such prospectus.

/s/ DELOITTE & TOUCHE LLP

Houston, Texas

November 2, 2017

XML

DOCUMENT AND ENTITY INFORMATION	9 Months Ended
	Sep. 30, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	ProPetro Holding Corp.
Entity Central Index Key	0001680247
Document Type	S-1
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Trading Symbol	PUMP
Entity Filer Category	Non-accelerated Filer
Current Fiscal Year End Date	--12-31

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 51,008,000	$ 133,595,602	$ 34,310,323
Accounts receivable - net of allowance for doubtful accounts of $335 (thousands), $552 (thousands), $551,909, $845,681, respectively	160,047,000	115,178,992	90,290,905
Inventories	9,148,000	4,712,850	8,572,015
Prepaid expenses	5,543,000	4,608,000	4,488,180
Other current assets	975,000	6,683,739	803,828
Total current assets	226,721,000	264,780,045	138,465,251
PROPERTY AND EQUIPMENT - Net of accumulated depreciation	399,268,000	263,861,645	291,838,498
OTHER NONCURRENT ASSETS:
Goodwill	9,425,000	9,424,999	10,602,147
Intangible assets - net of amortization	373,000	589,039	877,027
Deferred revenue rebate - net of amortization	1,077,000	2,461,669	4,307,921
Other noncurrent assets	1,727,000	304,000	363,490
Total other noncurrent assets	12,602,000	12,780,000	16,150,585
TOTAL ASSETS	638,591,000	541,422,298	446,454,334
CURRENT LIABILITIES:
Accounts payable	181,660,000	129,092,821	87,365,143
Accrued liabilities	11,074,000	13,619,471	7,051,915
Current portion of long-term debt	7,441,000	16,920,074	16,295,302
Accrued interest payable	86,000	109,000	76,794
Total current liabilities	200,261,000	159,740,703	110,789,154
DEFERRED INCOME TAXES	1,315,000	1,148,470	29,120,052
LONG-TERM DEBT	34,476,000	159,407,085	236,875,829
OTHER LONG-TERM LIABILITIES	124,000	116,553	98,068
Total liabilities	236,176,000	320,412,811	376,883,103
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY:
Preferred stock, $0.001 par value, 30,000,000 shares authorized, 0 (9/30/2017), 16,999,990 (12/31/2016) and 0 (12/31/2015) shares issued and outstanding, respectively	0	17,000	0
Preferred stock, additional paid-in capital	0	162,494,174	0
Common stock, $0.001 par value, 200,000,000 shares authorized, 83,039,854 (9/30/2017) 52,627,652 (12/31/2016) and 34,922,662 (12/31/2015) shares issued and outstanding, respectively	83,000	52,628	34,993
Additional paid-in capital	606,707,000	265,355,194	223,298,351
Accumulated deficit	(204,375,000)	(206,909,509)	(153,762,113)
Total shareholders’ equity	402,415,000	221,009,487	69,571,231
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 638,591,000	$ 541,422,298	$ 446,454,334

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 335,000	$ 551,909	$ 845,681
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Preferred stock, authorized (in shares)	30,000,000	30,000,000	30,000,000
Preferred stock, issued (in shares)	0	16,999,990	0
Preferred stock, outstanding (in shares)	0	16,999,990	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Common stock, authorized (in shares)	200,000,000	200,000,000	200,000,000
Common stock, issued (in shares)	83,039,854	52,627,652	34,992,662
Common stock, outstanding (in shares)	83,039,854	52,627,652	34,992,662

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
REVENUE - Service revenue	$ 282,730,000	$ 116,904,000	$ 668,153,000	$ 272,999,000	$ 436,920,270	$ 569,617,758
COSTS AND EXPENSES
Cost of services (exclusive of depreciation and amortization)	225,433,000	110,223,000	551,775,000	255,362,000	404,140,241	483,337,584
General and administrative (inclusive of stock-based compensation)	11,106,000	5,856,000	38,881,000	17,197,000	26,613,123	27,369,740
Depreciation and amortization	14,745,000	10,790,000	38,602,000	32,669,000	43,541,679	50,133,993
Property and equipment impairment expense			0	0	6,305,426	36,609,332
Goodwill impairment expense					1,177,148	0
Loss/(gain) on disposal of assets	8,742,000	5,923,000	28,971,000	12,859,000	22,528,670	21,267,985
Total costs and expenses	260,026,000	132,792,000	658,229,000	318,087,000	504,306,287	618,718,634
OPERATING INCOME (LOSS)	22,704,000	(15,888,000)	9,924,000	(45,088,000)	(67,386,017)	(49,100,876)
OTHER INCOME (EXPENSE):
Interest expense	(644,000)	(4,550,000)	(6,469,000)	(15,942,000)	(20,386,695)	(21,641,454)
Gain on extinguishment of debt	0	0	0	6,975,000	6,974,805	0
Other expense	(191,000)	(106,000)	(792,000)	(419,000)	(321,071)	(497,924)
Total other income (expense)	(835,000)	(4,656,000)	(7,261,000)	(9,386,000)	(13,732,961)	(22,139,378)
INCOME (LOSS) BEFORE INCOME TAXES	21,869,000	(20,544,000)	2,663,000	(54,474,000)	(81,118,978)	(71,240,254)
INCOME TAX (EXPENSE)/BENEFIT	96,000	6,946,000	(128,000)	18,644,000	27,971,582	25,387,570
NET INCOME (LOSS)	$ 21,965,000	$ (13,598,000)	$ 2,535,000	$ (35,830,000)	$ (53,147,396)	$ (45,852,684)
NET INCOME (LOSS) PER COMMON SHARE:
Basic (in dollars per share)	$ 0.26	$ (0.26)	$ 0.03	$ (0.84)	$ (1.19)	$ (1.31)
Diluted (in dollars per share)	$ 0.25	$ (0.26)	$ 0.03	$ (0.84)	$ (1.19)	$ (1.31)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	83,040,000	52,975,000	74,124,000	42,526,000	44,786,687	34,992,662
Diluted (in shares)	86,264,000	52,975,000	77,118,000	42,526,000	44,786,687	34,992,662

XML

CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)	Total	Preferred Stock	Preferred Stock Additional Paid-in Capital	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Common Class A	Common Class A Common Stock	Common Class A Additional Paid-In Capital	Preferred Class A	Preferred Class A Preferred Stock	Preferred Class A Preferred Stock Additional Paid-in Capital
BALANCE at Dec. 31, 2014	$ 114,185,091	$ 0	$ 0	$ 34,993	$ 222,059,527	$ (107,909,429)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 1,238,824				1,238,824
Exercise of stock options—net (in shares)	0
Net loss	$ (45,852,684)					(45,852,684)
BALANCE at Dec. 31, 2015	69,571,231	$ 0	0	$ 34,993	223,298,351	(153,762,113)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 1,649,282				1,649,282
Issuance of stock, net of costs							$ 40,425,196	$ 17,635	$ 40,407,561	$ 162,511,174	$ 17,000	$ 162,494,174
Exercise of stock options—net (in shares)	0
Net loss	$ (53,147,396)					(53,147,396)
Balance (in shares) at Dec. 31, 2016		17,000,000		52,628,000
BALANCE at Dec. 31, 2016	221,009,487	$ 17,000	162,494,174	$ 52,628	265,355,194	(206,909,509)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	8,730,000				8,730,000
Issuance of stock (in shares)				13,250,000
Issuance of stock, net of costs	170,141,000			$ 13,000	170,128,000
Conversion of preferred stock to common at Initial Public Offering (in shares)		(17,000,000)		17,000,000
Conversion of preferred stock to common at Initial Public Offering	$ 0	$ (17,000)	(162,494,000)	$ 17,000	162,494,000
Exercise of stock options—net (in shares)	226,194			162,000
Exercise of stock options—net	$ 0			$ 0	0
Net loss	2,535,000					2,535,000
Balance (in shares) at Sep. 30, 2017		0		83,040,000
BALANCE at Sep. 30, 2017	$ 402,415,000	$ 0	$ 0	$ 83,000	$ 606,707,000	$ (204,375,000)

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ 2,535,000	$ (35,830,000)	$ (53,147,396)	$ (45,852,684)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	38,602,000	32,669,000	43,541,679	50,133,993
Gain on extinguishment	0	(6,975,000)	(6,974,805)	0
Property and equipment impairment expense	0	0	6,305,426	36,609,332
Goodwill impairment expense			1,177,148	0
Deferred income tax expense (benefit)	166,000	(18,644,000)	(27,971,582)	(23,944,640)
Amortization of deferred revenue rebate	1,385,000	1,385,000	1,846,251	1,846,251
Amortization of deferred debt issuance costs	3,322,000	1,806,000	2,090,874	1,351,202
Stock-based compensation	8,730,000	1,130,000	1,649,282	1,238,824
Loss/(gain) on disposal of assets	28,971,000	12,859,000	22,528,670	21,267,985
(Gain) loss on interest rate swap	(226,000)	(54,000)	(205,422)	260,168
Changes in operating assets and liabilities:
Accounts receivable	(44,868,000)	3,255,000	(24,888,087)	67,348,446
Other current assets	3,271,000	(4,000)	(562,897)	8,666
Inventories	(4,435,000)	1,579,000	3,859,165	(622,494)
Prepaid expenses	(910,000)	2,845,000	(62,093)	2,081,537
Accounts payable	41,564,000	(2,294,000)	37,047,563	(23,889,408)
Accrued liabilities	589,000	620,000	4,392,287	(6,294,956)
Accrued interest	(23,000)	1,000	31,544	(311,500)
Net cash (used in) provided by operating activities	78,673,000	(5,652,000)	10,657,607	81,230,722
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(193,820,000)	(18,631,000)	(42,831,884)	(62,855,418)
Proceeds from sale of assets	4,237,000	475,000	1,144,200	79,045
Net cash used in investing activities	(189,583,000)	(18,156,000)	(41,687,684)	(62,776,373)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings	27,112,000	0	0	60,718,300
Repayments of borrowings	(164,638,000)	(42,166,000)	(41,295,302)	(73,781,755)
Proceeds from insurance financing			4,126,462	4,105,133
Repayments of insurance financing	(2,900,000)	(2,833,000)	(4,527,287)	(6,257,342)
Extinguishment of debt			(30,000,000)	0
Payment of debt extinguishment costs	0	(525,000)	(525,196)	0
Payment of debt issuance costs	(1,653,000)	(115,000)	(139,543)	0
Proceeds from contributed capital			40,425,196	0
Proceeds from issuance of convertible preferred stock			169,999,943	0
Equity capitalization	0	40,425,000
Proceeds from IPO	185,500,000	0
Payment of IPO costs	(15,099,000)	0	(7,488,768)	0
Payment of deferred IPO costs			(260,149)	0
Net cash provided by (used in) financing activities	28,322,000	(5,214,000)	130,315,356	(15,215,664)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(82,588,000)	(29,022,000)	99,285,279	3,238,685
CASH AND CASH EQUIVALENTS - Beginning of period	133,595,602	34,310,323	34,310,323	31,071,638
CASH AND CASH EQUIVALENTS - End of period	$ 51,008,000	$ 5,288,000	$ 133,595,602	$ 34,310,323

XML

Basis of Presentation

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying condensed consolidated financial statements of ProPetro Holding Corp. and its subsidiary (the "Company," "we," "us" or "our") have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission ("SEC") for interim financial information and do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America ("GAAP") for annual financial statements. Those adjustments (which consisted of normal recurring accruals) that are, in the opinion of management, necessary for a fair presentation of the results of the interim periods have been made. Results of operations for such interim periods are not necessarily indicative of the results of operations for a full year due to changes in market conditions and other factors. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2016 included in the final prospectus of the Company filed with the SEC pursuant to rule 424(b) under the Securities Act of 1933 on March 20, 2017 ("Prospectus").

Initial Public Offering

On March 22, 2017, we consummated our initial public offering ("IPO"), in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold by the Company and 11,750,000 shares sold by existing stockholders. We received net proceeds of approximately $170.1 million after deducting $10.9 million of underwriting discounts and commissions, and $4.5 million of other offering expenses. Upon closing of the IPO, we used the proceeds (i) to repay $71.8 million in outstanding borrowings under our Term Loan (as defined in Note 4), (ii) to fund the purchase of additional hydraulic fracturing fleets and ancillary equipment, and (iii) for general corporate purposes.

In connection with the IPO, the Company executed a stock split, such that each holder of common stock of the Company received 1.45 shares of common stock for every one share of previous common stock. Accordingly, any information related to, or dependent upon, the share or option counts in our comparative 2016 condensed consolidated financial statements (Unaudited) and Note 6, Net Income (Loss) per Share, Note 7, Stock-BasedCompensation, and Note 10, Equity Capitalization, have been updated to reflect the effect of the stock split.

ORGANIZATION AND HISTORY

ProPetro Holding Corp. (“Holding”), a Texas corporation was formed on April 14, 2007, to serve as a holding company for its wholly owned subsidiary ProPetro Services, Inc. (“Services”), a Texas corporation. Services provide hydraulic fracturing, cementing, acidizing, coil tubing, Permian drilling, surface drilling and flowback services to oil and gas producers, located primarily in Texas, Oklahoma, New Mexico, Utah, Colorado, and Wyoming.

On March 4, 2013, a majority interest in the Company was purchased by Energy Capital Partners (“ECP”), an energy‑focused private equity firm (see Note 18).

On December 22, 2016, the Company restated and amended the Company’s Shareholders Agreement and certificate of formation in the state of Texas, approving a reverse stock split, such that each holder of common stock of the Company shall receive one share of common stock for every 170.4667 shares of previous common stock held. In conjunction, the Company amended the amount of authorized shares to 230,000,000, of which 200,000,000 are common and 30,000,000 are preferred.

On March 22, 2017, we completed our IPO in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold by the Company and 11,750,000 shares sold by existing stockholders. We received net proceeds of approximately $170.1 million after deducting $10.9 million of underwriting discounts and commissions, and $4.5 million of other offering expenses. At closing, we used the proceeds (i) to repay $71.8 million in outstanding borrowings under the term loan, (ii) to fund the purchase of additional hydraulic fracturing fleets and ancillary equipment, and (iii) for general corporate purposes. In connection with the IPO, the Company executed a stock split, such that each holder of common stock of the Company received 1.45 shares of common stock for every one share of previous common stock, and all 16,999,990 shares of our outstanding Series A Preferred Stock converted to common stock on a 1:1 basis.

Accordingly, any information related to or dependent upon the share or option counts in the 2016 and 2015 consolidated financial statements and Note 13 Net Loss per Share, Note 14 Stock‑Based Compensation, and Note 18 Equity Capitalization have been updated to reflect the effect of the reverse stock split in December 2016 and the stock split in March 2017.

Holding and Services are collectively referred to as the “Company” in the accompanying consolidated financial statements.

XML

Organization and History

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and History

Basis of Presentation

The accompanying condensed consolidated financial statements of ProPetro Holding Corp. and its subsidiary (the "Company," "we," "us" or "our") have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission ("SEC") for interim financial information and do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America ("GAAP") for annual financial statements. Those adjustments (which consisted of normal recurring accruals) that are, in the opinion of management, necessary for a fair presentation of the results of the interim periods have been made. Results of operations for such interim periods are not necessarily indicative of the results of operations for a full year due to changes in market conditions and other factors. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2016 included in the final prospectus of the Company filed with the SEC pursuant to rule 424(b) under the Securities Act of 1933 on March 20, 2017 ("Prospectus").

Initial Public Offering

On March 22, 2017, we consummated our initial public offering ("IPO"), in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold by the Company and 11,750,000 shares sold by existing stockholders. We received net proceeds of approximately $170.1 million after deducting $10.9 million of underwriting discounts and commissions, and $4.5 million of other offering expenses. Upon closing of the IPO, we used the proceeds (i) to repay $71.8 million in outstanding borrowings under our Term Loan (as defined in Note 4), (ii) to fund the purchase of additional hydraulic fracturing fleets and ancillary equipment, and (iii) for general corporate purposes.

In connection with the IPO, the Company executed a stock split, such that each holder of common stock of the Company received 1.45 shares of common stock for every one share of previous common stock. Accordingly, any information related to, or dependent upon, the share or option counts in our comparative 2016 condensed consolidated financial statements (Unaudited) and Note 6, Net Income (Loss) per Share, Note 7, Stock-BasedCompensation, and Note 10, Equity Capitalization, have been updated to reflect the effect of the stock split.

ORGANIZATION AND HISTORY

ProPetro Holding Corp. (“Holding”), a Texas corporation was formed on April 14, 2007, to serve as a holding company for its wholly owned subsidiary ProPetro Services, Inc. (“Services”), a Texas corporation. Services provide hydraulic fracturing, cementing, acidizing, coil tubing, Permian drilling, surface drilling and flowback services to oil and gas producers, located primarily in Texas, Oklahoma, New Mexico, Utah, Colorado, and Wyoming.

On March 4, 2013, a majority interest in the Company was purchased by Energy Capital Partners (“ECP”), an energy‑focused private equity firm (see Note 18).

On December 22, 2016, the Company restated and amended the Company’s Shareholders Agreement and certificate of formation in the state of Texas, approving a reverse stock split, such that each holder of common stock of the Company shall receive one share of common stock for every 170.4667 shares of previous common stock held. In conjunction, the Company amended the amount of authorized shares to 230,000,000, of which 200,000,000 are common and 30,000,000 are preferred.

On March 22, 2017, we completed our IPO in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold by the Company and 11,750,000 shares sold by existing stockholders. We received net proceeds of approximately $170.1 million after deducting $10.9 million of underwriting discounts and commissions, and $4.5 million of other offering expenses. At closing, we used the proceeds (i) to repay $71.8 million in outstanding borrowings under the term loan, (ii) to fund the purchase of additional hydraulic fracturing fleets and ancillary equipment, and (iii) for general corporate purposes. In connection with the IPO, the Company executed a stock split, such that each holder of common stock of the Company received 1.45 shares of common stock for every one share of previous common stock, and all 16,999,990 shares of our outstanding Series A Preferred Stock converted to common stock on a 1:1 basis.

Accordingly, any information related to or dependent upon the share or option counts in the 2016 and 2015 consolidated financial statements and Note 13 Net Loss per Share, Note 14 Stock‑Based Compensation, and Note 18 Equity Capitalization have been updated to reflect the effect of the reverse stock split in December 2016 and the stock split in March 2017.

Holding and Services are collectively referred to as the “Company” in the accompanying consolidated financial statements.

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Recently Issued Accounting Standards

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Recently Issued Accounting Standards

Recently Issued Accounting Standards

In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014-09 requires entities to recognize revenue to depict transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU No. 2014-09 requires entities to disclose both qualitative and quantitative information that enables users of the consolidated financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, including disclosure of significant judgments affecting the recognition of revenue. ASU No. 2014-09 was originally effective for annual periods beginning after December 15, 2016, using either the retrospective or cumulative effect transition method. On August 12, 2015, the FASB issued ASU No. 2015-14, which defers the effective date of the revenue standard, ASU No. 2014-09, by one year for all entities and permits early adoption on a limited basis. We have completed our preliminary evaluation of ASU No. 2014-09, and the adoption of this guidance will not materially affect our revenue recognition. However, there will be additional disclosures on our consolidated financial statements relating to the adoption of this standard.

In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory, which requires entities to measure most inventory "at the lower of cost and net realizable value," thereby simplifying the current guidance under which an entity must measure inventory at the lower of cost or market. ASU No. 2015-11 does not apply to inventories that are measured by using either the last-in, first-out method or the retail inventory method. The amendments in ASU No. 2015-11 are effective for fiscal years beginning after December 15, 2016. The ASU became effective for us in 2017 and the adoption of this guidance did not materially affect our consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, Leases, a new standard on accounting for leases. The ASU introduces a lessee model that brings most leases on the balance sheet. The new standard also aligns many of the underlying principles of the new lessor model with those in the current accounting guidance as well as the FASB’s new revenue recognition standard. However, the ASU eliminates the use of bright-line tests in determining lease classification as required in the current guidance. The ASU also requires additional qualitative disclosures along with specific quantitative disclosures to better enable users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The new standard is effective for annual reporting periods beginning after December 15, 2018, including periods within that reporting period, using a modified retrospective approach. Early adoption is permitted. We have not completed an evaluation of the impact the pronouncement will have on our consolidated financial statements and related disclosures.

In March 2016, the FASB issued ASU No. 2016-09, Compensation- Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, which modifies several aspects of the accounting for share-based payment transactions including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The new standard is effective for fiscal years and interim periods beginning after December 15, 2016, with early adoption permitted. The ASU became effective for us in 2017 and the adoption of this guidance did not materially affect our consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment, which removes the requirement to compare the implied fair value of goodwill with its carrying amount as part of step two of the goodwill impairment test. As a result, under this ASU, an entity would recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. This pronouncement is effective for impairment tests in fiscal years beginning after December 15, 2019, on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We believe that the adoption of this guidance will not materially affect our consolidated financial statements.

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Significant Accounting Policies

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Significant Accounting Policies

SIGNIFICANT ACCOUNTING POLICIES

A summary of the significant accounting policies consistently applied in the preparation of the accompanying consolidated financial statements are as follows:

Principles of Consolidation — The accompanying consolidated financial statements include the accounts of Holding and its wholly owned subsidiary, Services. All intercompany accounts and transactions have been eliminated in consolidation.

Basis of Presentation — The accompanying consolidated financial statements and related notes have been prepared pursuant to the rules and regulations of the Securities Exchange Commission (SEC) and in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”).

Use of Estimates — Management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and revenues and expenses during the reporting period. Such estimates include, but are not limited to, allowance for doubtful accounts, depreciation of property and equipment, estimates of fair value of property and equipment, estimates related to fair value of reporting units for purposes of assessing goodwill, estimates related to deferred tax assets and liabilities, including any related valuation allowances, and estimates of fair value of stock‑based compensation. Actual results could differ from those estimates.

Revenue Recognition — The Company’s services are sold based upon contracts or other agreements with the customer that include fixed or determinable prices and do not include other post‑delivery obligations. Revenue for services is recognized as the services are rendered and when collectability is reasonably assured. Rates for services are typically determined per the contract or agreement with customers.

Pressure Pumping — Pressure pumping consists of downhole pumping services including hydraulic fracturing, acidizing and cementing. The Company recognizes revenues when services are performed, collection of the receivables is probable, and a price is fixed or determinable. The Company prices services for its pressure pumping by the job, project or day depending on the type of service performed and request from the customer.

Drilling Services — Drilling services consists of surface air drilling and Permian drilling, whereby we drill a well for a customer to a certain depth using a drilling rig and related equipment. The Company recognizes revenues either on a “turnkey” contract basis, in which a fixed and set price for the job is determinable, on a “daywork” contract basis, in which a stated rate per day is fixed and determinable, or on a “footage” contract basis, in which a rate per feet drilled is fixed and determinable.

Other Completion & Production Services — Other completion & production services consists of coil tubing and flowback services whereby the Company recognizes revenues when services are performed either on a per job or per day or hourly rate, collections of receivables are probable, and a price is fixed or determinable.

Cash and Cash Equivalents — The Company considers highly liquid investments with initial maturities of three months or less to be cash equivalents.

Accounts Receivable — Accounts receivables are stated at the amount billed and billable to customers. The Company’s allowance for doubtful accounts is based on management’s evaluations of the collectability of each accounts receivable based on the customer’s payment history and general economic conditions. At December 31, 2016 and 2015, the allowance for doubtful accounts was $0.6 million and $0.8 million, respectively.

Inventories — Inventories, which consists only of raw materials, are stated at lower of average cost or market.

Property and Equipment — The Company’s property and equipment are recorded at cost, less accumulated depreciation.

Upon sale or retirement of property and equipment, the cost and related accumulated depreciation are removed from the balance sheet and the net amount, less proceeds from disposal, is recognized as a gain or loss in the statement of operations.

The Company recorded a loss on disposal of assets of $22.5 million and $21.3 million for the years ended December 31, 2016 and 2015, respectively. The recorded loss on disposal is primarily attributed to the increased service intensity of pressure pumping activity which has resulted in a shorter useful life and faster replacement of certain components of the pressure pumping equipment.

Depreciation — Depreciation of property and equipment is provided on the straight‑line method over the following estimated useful lives:

Vehicles	1 ‑ 5 years
Equipment	2 ‑ 20 years
Leasehold improvements	5 ‑ 20 years

Impairment of Long‑Lived Assets — In accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 360, Accounting for the Impairment or Disposal of Long‑Lived Assets, the Company reviews its long‑lived assets to be held and used whenever events or circumstances indicate that the carrying value of those assets may not be recoverable.

An impairment loss is indicated if the sum of the expected future undiscounted cash flows attributable to the asset group is less than the carrying amount of such asset group. In this circumstance, the Company recognizes an impairment loss for the amount by which the carrying amount of the asset group exceeds the fair value of the asset group. The impairment recorded in 2015 was $36.6 million for property and equipment relating to the Permian drilling and acidizing asset groups. The impairment recorded in 2016 was $6.3 million for property and equipment relating to the Permian drilling asset group.

The Company accounts for long‑lived assets to be disposed of at the lower of their carrying amount or fair value, less cost to sell once management has committed to a plan to dispose of the assets.

Goodwill — Goodwill is the excess of the consideration transferred over the fair value of the tangible and identifiable intangible assets and liabilities recognized. Goodwill is not amortized. We perform an annual impairment test of goodwill as of December 31, or more frequently if circumstances indicate that impairment may exist. The determination of impairment is made by comparing the carrying amount of a reporting unit with its fair value, which is generally calculated using a combination of market and income approaches. If the fair value of the reporting unit exceeds the carrying value, no further testing is performed. If the fair value of the reporting unit is less than the carrying value, the implied fair value of reporting unit goodwill is calculated. The Company then compares the carrying value of goodwill to its implied fair value. In estimating the implied fair value of goodwill at the reporting unit, the Company assigns the fair value of the reporting unit to all of the assets and liabilities associated with the reporting unit as if the reporting unit had been acquired in a business combination. The excess of the fair value of the reporting unit over the amount assigned to the assets and liabilities of the reporting unit is the implied fair value of goodwill. If the carrying amount of goodwill exceeds the implied fair value of goodwill, an impairment loss is recognized for that difference.

In 2014, we acquired Blackrock Drilling, Inc. (“Blackrock”) for $1.8 million. The assets acquired from Blackrock were recorded as $0.6 million of equipment with the excess of the purchase price over the fair value of the assets recorded as goodwill of $1.2 million. The acquisition complemented our existing drilling operations. The transaction has been accounted for using the acquisition method of accounting and, accordingly, assets and liabilities assumed were recorded at their fair values as of the acquisition date. Based on our goodwill impairment test as of December 31, 2016, the Company concluded that there was an impairment of goodwill of $1.2 million related to the Blackrock acquisition. No impairment was recorded during the year ended December 31, 2015. Prior to the impairment write‑down in the current year, the goodwill related to the Blackrock acquisition of $1.2 million was recorded in the all other reportable segment.

In 2011, we acquired Technology Stimulation Services, LLC (“TSS”) for $24.4 million. The assets acquired from TSS were recorded as $15 million of equipment with the excess of the purchase price over fair value of the assets recorded as goodwill of $9.4 million. The acquisition complemented our existing pressure pumping business. The transaction has been accounted for using the acquisition method of accounting and, accordingly, assets and liabilities assumed were recorded at their fair values as of the acquisition date. Based on our goodwill impairment tests as of December 31, 2016 and 2015, we concluded that the goodwill related to TSS acquisition was determined not to be impaired. The goodwill related to the TSS acquisition of $9.4 million is recorded in the pressure pumping reportable segment.

Intangible Assets — Intangible assets with finite useful lives are amortized on a basis that reflects the pattern in which the economic benefits of the intangible assets are realized, which is generally on a straight‑line basis over the asset’s estimated useful life.

Income Taxes — Income taxes are accounted for under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of differences between the consolidated financial statements and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.

We recognize deferred tax assets to the extent that we believe these assets are more likely than not to be realized. In making such a determination, we consider all positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, and the results of recent operations. If we determine that we would be able to realize our deferred tax assets in the future in excess of their net recorded amount, we would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes.

Advertising Expense — All advertising costs are expensed as incurred. For the years ended December 31, 2016 and 2015, advertising expense was $0.4 million and $0.9 million, respectively.

Deferred Loan Costs — The Company capitalized certain costs in connection with obtaining its borrowings, including lender, legal, and accounting fees. These costs are being amortized over the term of the related loan using the straight‑line method (which approximates the interest method). Deferred loan costs amortization is included in interest expense. Unamortized deferred loan costs associated with loans paid off or refinanced with different lenders are charged off in the period in which such an event occurs. Deferred loan costs are classified as a reduction of long‑term debt in the consolidated balance sheet. Amortization of deferred loan costs is recorded as interest expense in the statement of operations, and at December 31, 2016 and 2015, the amount of expense recorded was $2.1 million and $1.4 million, respectively.

Stock Based Compensation — The Company recognizes the cost of stock‑based awards on a straight‑line basis over the requisite service period of the award, which is usually the vesting period under the fair value method. Total compensation cost is measured on the grant date using fair value estimates.

Insurance Financing — The Company annually renews their commercial insurance policies and records a prepaid insurance asset and amortizes it monthly over the coverage period. The Company may choose to finance a portion of the premiums and will make repayments monthly over ten months in equal installments.

Going Concern — The Company annually evaluates its ability to continue as a going concern as required by Accounting Standards Update (ASU) No. 2014‑15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern and if necessary, provides disclosures if there is any substantial doubt about its ability to continue as a going concern.

Concentration of Credit Risk — The Company’s assets that are potentially subject to concentrations of credit risk are cash and cash equivalents and trade accounts receivable. Cash balances are maintained in financial institutions, which at times exceed federally insured limits. The Company monitors the financial condition of the financial institutions in which accounts are maintained and has not experienced any losses in such accounts. The receivables of the Company are spread over a number of customers, a majority of which are operators and suppliers to the oil and natural gas industries. The Company performs ongoing credit evaluations as to the financial condition of its customers with respect to trade receivables.

Recently Issued Accounting Standards — In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014‑09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014‑09 requires entities to recognize revenue to depict transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU No. 2014‑09 requires entities to disclose both qualitative and quantitative information that enables users of consolidated financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, including disclosure of significant judgments affecting the recognition of revenue. ASU No. 2014‑09 was originally effective for annual periods beginning after December 15, 2016, using either the retrospective or cumulative effect transition method. On August 12, 2015, the FASB issued ASU No. 2015‑14, which defers the effective date of the revenue standard, ASU No. 2014‑09, by one year for all entities and permits early adoption on a limited basis. The Company believes that the adoption of this guidance will not materially affect the Company’s revenue recognition. However, the Company will continue to evaluate and quantify the effect of the adoption of this guidance on its consolidated financial statements.

On July 22, 2015, the FASB issued ASU No. 2015‑11, Simplifying the Measurement of Inventory, which requires entities to measure most inventory “at the lower of cost and net realizable value,” thereby simplifying the current guidance under which an entity must measure inventory at the lower of cost or market. ASU No. 2015‑11 does not apply to inventories that are measured by using either the last‑in, first‑out method or the retail inventory method. The amendments in ASU No. 2015‑11 are effective for fiscal years beginning after December 15, 2016. The Company is currently evaluating the effect of the adoption of this guidance on the consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016‑02, Leases, a new standard on accounting for leases. The ASU introduces a lessee model that brings most leases on the balance sheet. The new standard also aligns many of the underlying principles of the new lessor model with those in the current accounting guidance as well as the FASB’s new revenue recognition standard. However, the ASU eliminates the use of bright‑line tests in determining lease classification as required in the current guidance. The ASU also requires additional qualitative disclosures along with specific quantitative disclosures to better enable users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The pronouncement is effective for annual reporting periods beginning after December 15, 2018, including periods within that reporting period, using a modified retrospective approach. Early adoption is permitted. The Company has not completed an evaluation of the impact the pronouncement will have on our consolidated financial statements and related disclosures.

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Supplemental Cash Flow Disclosures

12 Months Ended

Dec. 31, 2016

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flows Information

SUPPLEMENTAL CASH FLOWS INFORMATION

	December 31, 2016		December 31, 2015
Supplemental cash flows disclosures
Interest paid	$	18,248,687	$	20,531,410
Income taxes paid	$	2,897	$	1,295,173
Supplemental disclosure of non‑cash activities
Capital expenditures included in accounts payable	$	3,176,356	$	8,821,227

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Fair Value Measurements

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the "exit price") in an orderly transaction between market participants at the measurement date.

In determining fair value, the Company uses various valuation approaches and establishes a hierarchy for inputs used in measuring fair value that maximizes the use of relevant observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used, when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company's assumptions about the assumptions other market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on the observability of inputs as follows:

Level 1 — Valuations based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Valuation adjustments and block discounts are not applied to Level 1 instruments. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these instruments does not entail a significant degree of judgment.

Level 2 — Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.

Level 3 — Valuations based on inputs that are unobservable and significant to the overall fair value measurement.

A financial instrument's categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Our financial instruments include cash and cash equivalents, accounts receivable, accounts payable, and a derivative financial instrument. The estimated fair value of our financial instruments — cash and cash equivalents, accounts receivable and accounts payable at September 30, 2017 and December 31, 2016 approximates their carrying value as reflected in our condensed consolidated balance sheets due to their short-term nature. We use a derivative financial instrument, an interest rate swap, to manage interest rate risk. Our policies do not permit the use of derivative financial instruments for speculative purposes. We did not designate the interest rate swap as a hedge for accounting purposes. We record all derivatives as of the end of our reporting period in our condensed consolidated balance sheet at fair value, which is based on quoted market prices, a Level 1 input. We may be exposed to credit losses in the event of nonperformance by counterparties to the interest rate swap. The counterparty of the interest rate swap is a credible, large institution, and we do not believe there is significant or material credit risk upon settlement of the contract. The fair value of the interest rate swap liability at September 30, 2017 and December 31, 2016 was $0.03 million and $0.3 million, respectively. Based on quoted market prices as of September 30, 2017 and 2016, for contracts with similar terms and maturity date, as provided by the counterparty, we recorded a gain of $0.2 million and $0.1 million during the nine months ended September 30, 2017 and 2016, respectively.

Assets Measured at Fair Value on a Nonrecurring Basis

Assets measured at fair value on a nonrecurring basis at September 30, 2017 and December 31, 2016, respectively, are set forth below:

			Estimated fair value measurements
	Balance		Quoted prices in active market (Level 1)		Significant other observable inputs (Level 2)		Significant other unobservable inputs (Level 3)		Total gains (losses)
($ in thousands)
September 30, 2017:
Property and equipment, net	$	—	$	—	$	—	$	—	$	—
Goodwill	$	—	$	—	$	—	$	—	$	—
December 31, 2016:
Property and equipment, net	$	8,700	$	—	$	8,700	$	—	$	(6,305	)
Goodwill	$	9,425	$	—	$	—	$	9,425	$	(1,177	)

No impairment of property and equipment was recorded during the nine months ended September 30, 2017 and 2016. During the fourth quarter of 2016, the depressed cash flows and continued decline in utilization of our Permian drilling assets were indicative of potential impairment, resulting in the Company comparing the carrying value of the Permian drilling assets with its estimated fair value. We determined that the carrying value of the Permian drilling assets was greater than its estimated fair value, and as such, an impairment expense was recorded in the fourth quarter of 2016. The non-cash asset impairment charges recorded in the fourth quarter of 2016 for Permian drilling was $6.3 million, which had a then net carrying value of $15.0 million prior to the impairment write-down.

We generally apply fair value techniques to our reporting units on a nonrecurring basis associated with valuing potential impairment loss related to goodwill. Our estimate of the reporting unit fair value is based on a combination of income and market approaches, Level 1 and 3, respectively, in the fair value hierarchy. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value. Significant assumptions include projected revenue growth, capital expenditures, utilization, gross margins, discount rates, terminal growth rates, and weight allocation between income and market approaches. If the reporting unit's carrying amount exceeds its fair value, we consider goodwill impaired, and the impairment loss is calculated and recorded. There were no additions to, or disposal of, goodwill during the nine months ended September 30, 2017 and 2016. At December 31, 2016, we estimated the fair value of the surface drilling reporting unit to be $3.8 million and its carrying value was $4.2 million. As a result of the potential impairment due to the carrying value exceeding the estimated fair value, we then further determined the implied fair value of the $1.2 million goodwill for the surface drilling reporting unit to be $0. Accordingly, we recorded an impairment loss of $1.2 million during the fourth quarter of 2016.

FAIR VALUE MEASUREMENTS

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the “exit price”) in an orderly transaction between market participants at the measurement date.

In determining fair value, the Company uses various valuation approaches and establishes a hierarchy for inputs used in measuring fair value that maximizes the use of relevant observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used, when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the assumptions other market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on the observability of inputs as follows:

Level 1 — Valuations based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Valuation adjustments and block discounts are not applied to Level 1 instruments. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these instruments does not entail a significant degree of judgment.

Level 2 — Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.

Level 3 — Valuations based on inputs that are unobservable and significant to the overall fair value measurement.

A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Our financial instruments include cash and cash equivalents, accounts receivables, accounts payable, and a derivative financial instrument. The estimated fair value of our financial instruments — cash and cash equivalent, accounts receivable and accounts payable at December 31, 2016, and 2015 approximates their carrying value as reflected in our consolidated balance sheets because of their short‑term nature. We use a derivative financial instrument, an interest rate swap, to manage interest rate risk. Our policies do not permit the use of derivative financial instruments for speculative purposes. We did not designate the interest rate swap as a hedge for accounting purposes. We record all derivatives as of the end of our reporting period in our consolidated balance sheet at fair value, which is based on quoted market prices, which represents a level 1 in the fair value measurement hierarchy. We may be exposed to credit losses in the event of nonperformance by counterparties to the interest rate swap. The counterparty of the interest rate swap is a lender under our term loan and a credible, large institution, and the Company does not believe there is significant or material credit risk upon settling the contract. The fair value of the interest rate swap liability at December 31, 2016 and 2015 was $0.3 million and $0.5 million, respectively. Based on quoted market prices as of December 31, 2016 and 2015, for contracts with similar terms and maturity date, as provided by the counterparty, we recorded a gain of $0.2 million and a loss of $0.3 million, respectively.

Assets Measured at Fair Value on a Nonrecurring Basis

Assets measured at fair value on a nonrecurring basis at December 31, 2016 and 2015, respectively, are set forth below:

			Estimated fair value measurements
	Carrying Value		Quoted prices in active market (Level 1)		Significant other observable inputs (Level 2)		Significant other unobservable inputs (Level 3)		Total gains (losses)
2016:
Property and equipment, net	$	8,700,000	$	—	$	8,700,000	$	—	$	(6,305,426	)
Goodwill	$	9,424,999	$	—	$	—	$	9,424,999	$	(1,177,148	)
2015:
Property and equipment, net	$	291,838,498	$	—	$	291,838,498	$	—	$	(36,609,332	)

In 2016, the depressed cash flows and continued decline in utilization of our Permian drilling assets were indicative of potential impairment, resulting in the Company comparing the carrying value of the Permian drilling assets with its estimated fair value. We determined that the carrying value of the Permian drilling assets was greater than its estimated fair value and as such an impairment expense was recorded. In 2016, the non‑cash asset impairment charges for Permian drilling was $6.3 million, which had a net carrying value of $15.0 million prior to the impairment write‑down. In 2015, the non‑cash asset impairment charges for Permian drilling and acidizing was $28.6 million and $8 million, respectively, aggregating to a total of $36.6 million. In 2015, the Permian drilling and acidizing assets groups had a net carrying value of $48.1 million and $15.6 million prior to the impairment write‑down. See Note 7, “Impairment of Long‑lived Assets.”

The Company generally applies fair value techniques to our reporting units on a nonrecurring basis associated with valuing potential impairment loss related to goodwill. The Company’s estimate of the reporting unit fair value was based on a combination of income and market approaches, level 1 and 3, respectively in the fair value hierarchy. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value. Significant assumptions include projected revenue growth, capital expenditures, utilization, gross margins, discount rates, and terminal growth rates, and weight allocation between income and market approaches. If the reporting unit’s carrying amount exceeds its fair value, we consider goodwill impaired and perform a second step to measure the amount of the impairment loss. We estimated the fair value as of December 31, 2016 of the surface drilling reporting unit to be $3.8 million and its carrying value was $4.2 million. As a result of the potential impairment with the carrying value exceeding the estimated fair value, we then further determined the implied fair value of the $1.2 million goodwill for the surface drilling reporting unit to be $0. Accordingly, we recorded an impairment loss of $1.2 million. The impairment loss was attributable to the challenging oil and gas market and slow recovery of crude oil prices, all of which adversely impacted on our expected future cash flows for the surface drilling reporting unit. There was no impairment of goodwill recorded in 2015.

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Intangible Assets

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

INTANGIBLE ASSETS

Intangible assets are composed of internally developed software at December 31, 2016 and 2015. Intangible assets are amortized on a straight‑line basis with a useful life of five years. Amortization expense included in net loss for the years ended December 31, 2016 and 2015 was $0.3 million. The Company’s intangible assets subject to amortization are as follows:

	2016		2015
Internally developed software	$	1,439,941	$	1,439,941
Less accumulated amortization	850,902		562,914
Intangible assets — net	$	589,039	$	877,027

Estimated remaining amortization expense for each of the subsequent fiscal years is expected to be as follows:

Year	Estimated Future Amortization Expense
2017	$	287,988
2018	287,988
2019	13,063
Total	$	589,039

The average amortization period remaining is approximately 2.1 years.

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Property and Equipment

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Property and Equipment

PROPERTY AND EQUIPMENT

Property and equipment consisted of the following at December 31, 2016 and 2015, respectively:

	2016		2015
Equipment and vehicles	$	402,640,458	$	399,084,240
Leasehold improvements	4,500,406		5,003,838
Subtotal	407,140,864		404,088,078
Less accumulated depreciation	143,279,219		112,249,580
Property and equipment — net	$	263,861,645	$	291,838,498

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Impairment of Long-lived Assets

12 Months Ended

Dec. 31, 2016

Impairment of Long-lived Assets [Abstract]

Impairment of Long-lived Assets

IMPAIRMENT OF LONG‑LIVED ASSETS

Whenever events or circumstances indicate that the carrying value of long‑lived assets may not be recoverable, the Company reviews the carrying value of long‑lived assets, such as property and equipment and other assets to determine if they are recoverable. If any long‑lived assets are determined to be unrecoverable, an impairment expense is recorded in the period. Asset recoverability is estimated using undiscounted future net cash flows at the lowest identifiable level, excluding interest expense and one‑time other income and expense adjustments. The Company determined the lowest level of identifiable cash flows to be at the asset group level, which consists of hydraulic fracturing, cementing, acidizing, coil tubing, flowback, Permian drilling, and surface drilling.

In 2016, the gradual shift from vertical to horizontal drilling rigs in the Permian Basin has led to the deterioration in utilization of our Permian drilling rigs, and we expect undiscounted future cash flows to be lower than the carrying value of the Permian drilling assets. Given that the carrying value of the Permian drilling assets may not be recoverable, the Company estimated the fair value of the asset group and compared it to its carrying value. Potential impairment exists if the estimated undiscounted future net cash flows for a given asset group is less than the carrying amount of the asset group. The impairment expense is determined by comparing the estimated fair value with the carrying value of the related asset, and any excess amount by which the carrying value exceeds the fair value is recorded as an impairment expense in the period. The estimated fair value of the Permian drilling asset group of $8.7 million was determined using the market approach, which represents a level 2 in the fair value measurement hierarchy. Our fair value estimates required us to use significant other observable inputs including assumptions related to replacement cost, among others. An impairment expense of $6.3 million was recorded in 2016 as the carrying value of the Permian drilling asset group of $15.0 million was greater than its estimated fair value. All other assets groups were determined to be recoverable.

In 2015, the asset groups identified to have impairment were Permian drilling and acidizing, with estimated fair values of approximately $18.8 million and $6.3 million, respectively. The estimated fair value of the Permian drilling and acidizing asset groups was determined using the cost approach, which represents a level 2 in the fair value measurement hierarchy. During the year ended December 31, 2015, the impairment expense for Permian drilling and acidizing was $28.6 million and $8 million, respectively.

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Deferred Revenue Rebate

12 Months Ended

Dec. 31, 2016

Deferred Revenue Disclosure [Abstract]

Deferred Revenue Rebate

DEFERRED REVENUE REBATE

In November 2011, the Company acquired certain oilfield fracturing equipment from a customer and agreed to provide future fracturing services to the customer for a period of 78 months in exchange for a 12%$25 million note payable to the customer. The Company recorded the fracturing equipment at its estimated fair value of approximately $13 million and assigned the remaining value of approximately $12 million to a deferred revenue rebate account to be amortized over the customer’s 78‑month service period. In March 2013, the Company repaid the note payable to the customer. For the years ended December 31, 2016 and 2015, the Company recorded $1.8 million of amortization as a reduction of revenue.

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Long-Term Debt

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Debt Disclosure [Abstract]

Long-Term Debt

Long-Term Debt

2013 Term Loan and Revolving Credit Facility

On September 30, 2013, we entered into a term loan in the amount of $220 million ("Term Loan") with a $40 million revolving credit line ("Revolving Credit Facility"). Borrowings under the Term Loan and Revolving Credit Facility accrued interest at LIBOR plus 6.25%, subject to a 1% LIBOR floor, and were secured by a first priority lien and security interest in all assets of the Company. Proceeds from the Term Loan were used to pay off 100% of our debt outstanding, including accrued interest, at September 30, 2013, with excess proceeds from the Term Loan and the Revolving Credit Facility used to fund growth and working capital needs. The Term Loan and Revolving Credit Facility were scheduled to mature on September 30, 2019 and September 30, 2018, respectively, with quarterly and monthly payments of principal and interest, respectively.

Under the Term Loan and Revolving Credit Facility we were required to comply, subject to certain exceptions and materiality qualifiers, with certain customary affirmative and negative covenants, including, but not limited to, covenants pertaining to reporting, insurance, collateral maintenance, change of control, transactions with affiliates, distributions, and limitations on additional indebtedness. In addition, the Term Loan and Revolving Credit Facility included a maximum leverage ratio of 3.5x EBITDA (earnings before interest, taxes, depreciation, and amortization) to total debt, which became effective March 31, 2014.

In 2015, given the then near-term economic uncertainty and volatility of commodity prices, we determined that we were likely to be out of compliance with the leverage ratio covenant under the Term Loan and Revolving Credit Facility at the March 31, 2016 test date. Accordingly, the Company and its equity sponsor, Energy Capital Partners ("ECP"), commenced negotiations with the lenders to amend the covenants and leverage ratio in the Term Loan and Revolving Credit Facility. The resulting amendment and waiver agreement was executed on June 8, 2016. Under the terms of the amendment, ECP infused $40 million of additional equity into the Company, $10 million of which was reserved for working capital, with up to $30 million available to repurchase debt. A minority shareholder also infused $0.425 million alongside ECP to prevent dilution. The amendment and waiver also suspended the leverage ratio test until June 30, 2017, and provided us with 30 days to deliver any past-due financial statements.

Gain on Extinguishment of Debt — in connection with the amendment to the Term Loan and Revolving Credit Facility, we initiated an auction process with the lenders to repurchase a portion of debt for a price of 80 cents, a 20% discount to par value. The auction settled on June 16, 2016 as the Company repurchased a total amount of $37.5 million of debt for $30 million plus $0.5 million in debt extinguishment auction costs, leading to a gain on extinguishment of debt of $7.0 million.

On January 13, 2017, we repaid $75 million of the outstanding balance under the Term Loan and repaid the remaining balance of $13.5 million under the Revolving Credit Facility using a portion of the proceeds from the private placement offering. On March 22, 2017, we retired the $71.8 million remaining balance of the Term Loan, along with accrued interest, using a portion of the proceeds from our IPO. Each of the Term Loan and Revolving Credit Facility were terminated in accordance with their terms upon the repayment of outstanding borrowings.

Equipment and Manufacturing Notes

On November 24, 2015, we entered into a 36-month financing arrangement for three hydraulic fracturing fleets in the amount of $25 million, and a portion of the proceeds were used to pay off the previous manufacturer notes, with the remainder being used for additional liquidity.

On June 30, 2017, we entered into a financing arrangement for the purchase of light vehicles. As of September 30, 2017, we purchased certain light vehicles under this financing arrangement in the amount of $2.1 million.

ABL Credit Facility

On March 22, 2017, we entered into a new revolving credit facility with a $150 million borrowing capacity ("ABL Credit Facility"). Borrowings under the ABL Credit Facility accrue interest based on a three-tier pricing grid tied to availability, and we may elect for loans to be based on either LIBOR or base rate, plus the applicable margin, which ranges from 1.75% to 2.25% for LIBOR loans and 0.75% to 1.25% for base rate loans, with no LIBOR floor. Borrowings under the ABL Credit Facility are secured by a first priority lien and security interest in substantially all assets of the Company. The ABL Credit Facility has a tenor of 5 years and a borrowing base of 85% of eligible accounts receivable less customary reserves. Under this facility we are required to comply, subject to certain exceptions and materiality qualifiers, with certain customary affirmative and negative covenants, including, but not limited to, covenants pertaining to our ability to incur liens, indebtedness, changes in the nature of our business, mergers and other fundamental changes, disposal of assets, investments and restricted payments, amendments to our organizational documents or accounting policies, prepayments of certain debt, dividends, transactions with affiliates, and certain other activities. In addition, the ABL Credit Facility includes a Springing Fixed Charge Coverage Ratio of 1.0x when excess availability is less than the greater of (i) 10% of the lesser of the facility size and the Borrowing Base and (ii) $12 million. The ABL has a commitment fee of 0.375%, which reduces to 0.25% if utilization is greater than 50% of the borrowing base.

Total debt consisted of the following at September 30, 2017 and December 31, 2016, respectively:

($ in thousands)	2017		2016
ABL Credit Facility	$	25,000	$	—
6.25% "Term loan" due September 2019	—		146,750
Revolving Credit Facility	—		13,500
Equipment financing	16,917		19,193
Total debt	41,917		179,443
Less deferred loan costs, net of amortization	—		3,116
Subtotal	41,917		176,327
Less current portion of long-term debt	7,441		16,920
Total long-term debt, net of deferred loan costs	$	34,476	$	159,407

The loan origination costs relating to the ABL Credit Facility are classified as an asset in the balance sheet.

Annual Maturities — Scheduled remaining annual maturities of total debt are as follows at September 30, 2017:

($ in thousands)
2017	$	1,778
2018	14,298
2019	805
2020	36
2021 and thereafter	25,000
Total	$	41,917

LONG‑TERM DEBT

On September 30, 2013, the Company entered into a term loan in the amount of $220 million with a $40 million revolving credit line. The facility is secured by a first priority lien and security interest in all assets and equity of the Company. The senior secured credit facility carries a 6.25% interest rate, plus Eurodollar Rate with a 1% floor. The term loan is due September 30, 2019, and requires quarterly principal and interest payments. The revolving credit facility matures on September 30, 2018. The loan proceeds were used to pay off 100% of prior debt outstanding, plus any accrued interest due through September 30, 2013. The excess cash proceeds from the term loan, plus the $40 million revolver, were used as needed to fund growth and working capital needs.

During 2014, the Company additionally entered into certain term notes with the equipment manufacturer of certain fracturing equipment. The interest rate is 9.5% and requires monthly principal and interest payments in 13 installments. The short‑term financing allowed the Company to maintain maximum liquidity and make future monthly payments with the cash flow the fracturing equipment generated.

On November 24, 2015, the Company entered into 36‑month financing arrangement for three hydraulic fracturing fleets in the amount of $25 million, and a portion of the proceeds were used to pay off the manufacturer notes, with the remainder being used for additional liquidity.

The estimated fair value of the term loan at December 31, 2016 was approximately 89% of the carrying value, or $130.6 million, compared to $146.8 million carrying value. The estimated fair value of the term loan at December 31, 2015 was approximately 60% of the carrying value, or $117.2 million, compared to $195.3 million carrying value. The fair value of the revolver and the equipment financing approximates their carrying values.

Total debt consisted of the following notes at December 31, 2016 and 2015, respectively:

	2016		2015
6.25% Term loan due September 2019	$	146,750,000	$	195,250,000
Revolving credit facility	13,500,000		38,500,000
Equipment refinancing	19,192,838		24,488,140
Total debt	179,442,838		258,238,140
Less deferred loan costs, net of amortization	3,115,679		5,067,009
Subtotal	176,327,159		253,171,131
Less current portion of long‑term debt	16,920,074		16,295,302
Total long‑term debt, net of deferred loan costs	$	159,407,085	$	236,875,829

Covenants — The Company is required to meet certain affirmative and negative covenants that are considered normal and customary for arrangements of this type, with customary exceptions and materiality qualifiers, including, but not limited to, reporting requirements, insurance, maintenance of collateral, and limitations on additional indebtedness, change of control, transactions with affiliates, and distributions.

The financial covenant applicable is a maximum leverage ratio of 3.5x EBITDA (earnings before interest, taxes, depreciation, and amortization) to total debt. Effective March 31, 2014, the Company was required to be in compliance with these financial covenants. The Company was in compliance with the financial covenant at December 31, 2015.

In 2015 given the then near‑term economic uncertainty and volatility of commodity prices, the Company and its equity sponsor, Energy Capital Partners, engaged the lenders in negotiation to amend the existing credit agreement and negative covenants whereby the leverage ratio covenant was expected to be out of compliance as of March 31, 2016 test date. The amendment and waiver agreement was executed on June 8, 2016. The amended credit agreement key terms included Energy Capital Partners infusing $40 million of additional equity into the Company, $10 million of which was reserved for normal working capital and up to $30 million available to repurchase debt (see Note 18). A minority shareholder also infused $0.425 million alongside Energy Capital Partners to prevent dilution. The amendment and waiver also stated that there shall be no leverage ratio test until June 30, 2017, and any required financial statements past‑due were provided within 30 days.

Gain on Extinguishment of Debt — following the credit amendment on June 8, 2016, the Company initiated an auction process with the lenders to repurchase a portion of debt for a price of 80 cents, or a 20% discount to par value. The auction settled on June 16, 2016 as the Company repurchased a total amount of $37.5 million of debt for $30 million plus $0.525 million in debt extinguishment auction costs, leading to a gain on extinguishment of debt of $6.975 million.

Annual Maturities — Scheduled annual maturities of total debt are as follows at December 31, 2016:

2017	$	16,920,074
2018	37,772,764
2019	124,750,000
Total	$	179,442,838

On January 13, 2017, the Company paid down $75 million of the term loan using a portion of the proceeds from the private placement offering (see note 18). The one‑time principal payment of $75 million will be applied to the term debt with the remaining principal due upon maturity in 2019.

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Accrued Liabilities

12 Months Ended

Dec. 31, 2016

Other Liabilities Disclosure [Abstract]

Accrued Liabilities

ACCRUED LIABILITIES

Accrued liabilities consisted of the following at December 31, 2016 and 2015, respectively:

	2016		2015
Accrued insurance	$	2,900,221	$	2,778,368
Accrued payroll and related expenses	4,728,614		1,256,269
Other	5,990,636		3,017,278
Total	$	13,619,471	$	7,051,915

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Employee Benefit Plan

12 Months Ended

Dec. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Employee Benefit Plan

EMPLOYEE BENEFIT PLAN

The Company has a 401(k) plan whereby all employees with six months of service may contribute up to $15,000 to the plan. The employees vest in the Company contributions to the 401(k) plan 25% per year, beginning in the employee’s second year of service, with full vesting occurring after five years of service. The employees are fully vested in their contributions when made. The Company matches employee contributions 20 cents on the dollar up to 10% of gross salary. The Company has reported expense under the plan of $0.2 million for each of the years ended December 31, 2016 and 2015.

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Reportable Segment Information

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Segment Reporting [Abstract]

Reportable Segment Information

Reportable Segment Information

The Company has seven operating segments for which discreet financial information is readily available: hydraulic fracturing, cementing, acidizing, coil tubing, flowback, surface drilling, and Permian drilling. These segments represent how the Chief Operating Decision Maker (CODM) evaluates performance and allocates resources.

In accordance with Accounting Standards Codification (ASC) 280—Segment Reporting, the Company has one reportable segment (pressure pumping) comprised of the hydraulic fracturing, cementing, and acidizing operating segments. All other operating segments and corporate administrative expenses are included in the ‘‘all other’’category in the table below. Inter-segment revenues are not material and are not shown separately in the table below.

The Company manages and assesses the performance of the reportable segment by its adjusted EBITDA (earnings before other income (expense), interest, taxes, depreciation & amortization, stock-based compensation expense, impairment expense, (gain)/loss on disposal of assets, gain on extinguishment of debt and other unusual or nonrecurring expenses or income). A reconciliation from segment level financial information to the consolidated statement of operations is provided in the table below.

	Three months ended September 30, 2017							Nine months ended September 30, 2017
($ in thousands)	Pressure Pumping		All Other			Total		Pressure Pumping		All Other			Total
Service revenue	$	271,924	$	10,806		$	282,730	$	639,355	$	28,798		$	668,153
Adjusted EBITDA	$	50,013	$	(2,245	)	$	47,768	$	98,296	$	(3,641	)	$	94,655
Depreciation and amortization	$	13,637	$	1,108		$	14,745	$	35,228	$	3,374		$	38,602
Goodwill	$	9,425	$	—		$	9,425	$	9,425	$	—		$	9,425
Capital expenditures	$	61,752	$	765		$	62,517	$	203,097	$	3,231		$	206,328
Total assets	$	604,769	$	33,822		$	638,591	$	604,769	$	33,822		$	638,591
	Three months ended September 30, 2016							Nine months ended September 30, 2016
	Pressure Pumping		All Other			Total		Pressure Pumping		All Other			Total
Service revenue	$	109,697	$	7,207		$	116,904	$	251,410	$	21,589		$	272,999
Adjusted EBITDA	$	2,951	$	(1,616	)	$	1,335	$	6,500	$	(4,930	)	$	1,570
Depreciation and amortization	$	9,274	$	1,516		$	10,790	$	27,905	$	4,764		$	32,669
Goodwill	$	9,425	$	1,177		$	10,602	$	9,425	$	1,177		$	10,602
Capital expenditures	$	11,641	$	202		$	11,843	$	21,582	$	312		$	21,894
Total assets at December 31, 2016	$	501,906	$	39,516		$	541,422	$	501,906	$	39,516		$	541,422

Reconciliation of net income (loss) to adjusted EBITDA:

	Three months ended September 30, 2017									Nine months ended September 30, 2017
($ in thousands)	Pressure Pumping			All Other			Total			Pressure Pumping			All Other			Total
Net income (loss)	$	28,372		$	(6,407	)	$	21,965		$	30,087		$	(27,552	)	$	2,535
Depreciation and amortization	13,637			1,108			14,745			35,228			3,374			38,602
Interest expense	—			644			644			—			6,469			6,469
Income tax (benefit) expense	—			(96		)	(96		)	—			128			128
Loss on disposal of assets	7,552			1,190			8,742			27,943			1,028			28,971
Stock-based compensation	—			751			751			—			8,730			8,730
Other expense	—			191			191			—			792			792
Other general and administrative expense (1)	—			149			149			—			722			722
Deferred IPO bonus expense	452			225			677			5,038			2,668			7,706
Adjusted EBITDA	$	50,013		$	(2,245	)	$	47,768		$	98,296		$	(3,641	)	$	94,655
	Three months ended September 30, 2016									Nine months ended September 30, 2016
($ in thousands)	Pressure Pumping			All Other			Total			Pressure Pumping			All Other			Total
Net loss	$	(12,265	)	$	(1,333	)	$	(13,598	)	$	(34,815	)	$	(1,015	)	$	(35,830	)
Depreciation and amortization	9,274			1,516			10,790			27,905			4,764			32,669
Interest expense	—			4,550			4,550			—			15,942			15,942
Income tax benefit	—			(6,946		)	(6,946		)	—			(18,644		)	(18,644		)
(Gain)/loss on disposal of assets	5,942			(19		)	5,923			13,410			(551		)	12,859
Stock-based compensation	—			510			510			—			1,130			1,130
Gain on extinguishment of debt	—			—			—			—			(6,975		)	(6,975		)
Other expense	—			106			106			—			419			419
Adjusted EBITDA	$	2,951		$	(1,616	)	$	1,335		$	6,500		$	(4,930	)	$	1,570

____________________

(1) Other general and administrative expense relates to legal settlement expense.

REPORTABLE SEGMENT INFORMATION

The Company has seven operating segments for which discreet financial information is readily available: hydraulic fracturing, cementing, acidizing, coil tubing, flowback, surface drilling, and Permian drilling. These segments represent how the chief operating decision maker (CODM) evaluates performance and allocate resources.

In accordance with Accounting Standards Codification (ASC) 280 — Segment Reporting, the Company has one reportable segment (pressure pumping) comprised of the hydraulic fracturing, cementing, and acidizing operating segments. All other operating segments and corporate administrative expenses are included in the “all other”category in the table below. Inter‑segment revenues are not material and were not shown separately in the table below.

The Company manages and assesses the performance of the reportable segment by its adjusted EBITDA (earnings before other income (expense), interest, taxes, depreciation & amortization, stock‑based compensation expense, impairment expense, loss on disposal of assets). A reconciliation from segment level financial information to the consolidated statement of operations is provided in the table below.

	Pressure Pumping		All Other			Total
Year ended December 31, 2016
Service revenue	$	409,014,337	$	27,905,933		$	436,920,270
Adjusted EBITDA	$	15,655,202	$	(7,839,014	)	$	7,816,188
Depreciation and amortization	$	37,281,862	$	6,259,817		$	43,541,679
Property and equipment impairment expense	$	—	$	6,305,426		$	6,305,426
Goodwill impairment expense	$	—	$	1,177,148		$	1,177,148
Capital expenditures	$	45,472,835	$	535,405		$	46,008,240
Goodwill	$	9,424,999	$	—		$	9,424,999
Total assets	$	501,905,907	$	39,516,391		$	541,422,298
Year ended December 31, 2015
Service revenue	$	510,198,128	$	59,419,630		$	569,617,758
Adjusted EBITDA	$	62,540,290	$	(2,391,032	)	$	60,149,258
Depreciation and amortization	$	38,368,650	$	11,765,343		$	50,133,993
Property and equipment impairment expense	$	7,979,906	$	28,629,426		$	36,609,332
Capital expenditures	$	69,029,321	$	2,647,324		$	71,676,645
Goodwill	$	9,424,999	$	1,177,148		$	10,602,147
Total assets	$	398,449,448	$	48,004,886		$	446,454,334

Reconciliation of net loss to adjusted EBITDA:

	Total
Year ended December 31, 2016
Net loss	$	(53,147,396	)
Depreciation and amortization	43,541,679
Interest expense	20,386,695
Loss on disposal of assets	22,528,670
Property and equipment impairment expense	6,305,426
Goodwill impairment expense	1,177,148
Gain on extinguishment of debt	(6,974,805		)
Stock‑based compensation	1,649,282
Other expense	321,071
Income tax benefit	(27,971,582		)
Adjusted EBITDA (see total above)	$	7,816,188

	Total
Year ended December 31, 2015
Net loss	$	(45,852,684	)
Depreciation and amortization	50,133,993
Interest expense	21,641,454
Loss on disposal of assets	21,267,985
Property and equipment impairment expense	36,609,332
Stock‑based compensation	1,238,824
Other expense	497,924
Income tax expense	(25,387,570		)
Adjusted EBITDA (see total above)	$	60,149,258

Major Customers

For the years ended December 31, 2016 and 2015, the Company had revenue from four significant customers that accounted for the following percentages of the Company’s total revenue:

	2016		2015
Customer A	18.0	%	12.5	%
Customer B	12.5	%	8.8	%
Customer C	8.7	%	14.2	%
Customer D	7.0	%	11.1	%

For the year ended December 31, 2016, pressure pumping made up 96% of Customer A, 99% of Customer B, 100% of Customer C and 99% of Customer D. For the year ended December 31, 2015, pressure pumping made up 99% of Customer A, 100% of Customer B, 88% of Customer C and 99% of Customer D.

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Net Income (Loss) Per Share

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Earnings Per Share [Abstract]

Net Income (Loss) Per Share

Net Income (Loss) Per Share

Net income (loss) per share is determined by dividing the net income (loss) relevant to the common stockholders by the weighted average number of shares outstanding during the period. Diluted net income (loss) per common share uses the same net income (loss) divided by the number of shares that would be outstanding assuming dilutive options and stock are converted. The table below shows the calculations for the three and nine months ended September 30, 2017 and 2016.

	Three Months Ended September 30,					Nine Months Ended September 30,
(In thousands, except for per share data)	2017		2016			2017		2016
Numerator (both basic and diluted)
Net income (loss) relevant to common stockholders	$	21,965	$	(13,598	)	$	2,535	$	(35,830	)
Denominator
Denominator for basic income (loss) per share	83,040		52,975			74,124		42,526
Dilutive effect of stock options	2,808		—			2,822		—
Dilutive effect of performance stock units	37		—			—		—
Dilutive effect of non-vested restricted stock	379		—			172		—
Denominator for diluted income (loss) per share	86,264		52,975			77,118		42,526
Basic income (loss) per common share	$	0.26	$	(0.26	)	$	0.03	$	(0.84	)
Diluted income (loss) per common share	$	0.25	$	(0.26	)	$	0.03	$	(0.84	)

As shown in the table below, the following non-vested restricted stock, performance stock units, and stock options have not been included in the calculation of diluted income (loss) per share as they would be anti-dilutive to the calculation above.

	Three Months Ended September 30,		Nine Months Ended September 30,
(In thousands)	2017	2016	2017	2016
Stock options	789	4,646	789	4,646
Performance stock units	—	—	170	—
Non-vested restricted stock	—	372	318	372
	789	5,018	1,277	5,018

NET LOSS PER SHARE

The Company’s net loss per share is determined by dividing the net loss relevant to the common stock by the weighted average number of shares outstanding during the year. Diluted net loss per common share uses the same net loss divided by the number of shares that would be outstanding assuming dilutive options and stock are converted (conversion method). The table below shows the calculations for years ended December 31, 2016 and 2015.

	2016			2015
Numerator (both basic and diluted)
Net loss relevant to common stockholders	$	(53,147,396	)	$	(45,852,684	)
Denominator
Denominator for basic earnings (loss) per share	44,786,687			34,992,662
Denominator for diluted earnings (loss) per share	44,786,687			34,992,662
Basic loss per common share	$	(1.19	)	$	(1.31	)
Diluted loss per common share	$	(1.19	)	$	(1.31	)

The Company also has non‑vested restricted stock and stock options as shown in the table below, but have not been included in the above calculation of diluted earnings (loss) per share as it would be anti‑dilutive to the calculation above. Additionally, we excluded the preferred stock in the net loss per share calculation because the holders do not have a participating right in the undistributed earnings (loss) of the Company.

	2016	2015
Stock options	4,645,884	3,485,791
Preferred stock	16,999,990	—
Non‑vested restricted stock	372,335	372,335
	22,018,209	3,858,126

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Stock-Based Compensation

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

Stock-Based Compensation

Stock Options

Effective March 4, 2013, we adopted the ProPetro Stock Option Plan pursuant to which our Board of Directors may grant stock options or other stock-based awards to key employees, consultants, and directors. The Plan, as amended, is authorized to grant up to 4,645,884 shares of common stock to be issued upon exercise of the options. The Company’s share price used to estimate the fair value of the option at the grant date was based on a combination of income and market approaches, which are highly complex and sensitive. The income approach involves the use of a discounted cash flow method, with cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value of the Company’s stock. The expected term used to calculate the fair value of all options considers the vesting date and the grant’s expiration date. The expected volatility was estimated by considering comparable public companies, and the risk free rate is based on the U.S treasury yield curve as of the grant date. The dividend assumption is based on historical experience. After becoming a public company, the market price was used to determine the market value of our common stock. Prior to 2015, we had granted a total of 3,499,228 options with an exercise price of $3.96 per option, and all options expire 10 years from the date of grant.

On June 14, 2013, we granted 2,799,408 stock option awards to certain key employees and directors that shall vest and become exercisable based upon the achievement of a service requirement. The options vest in 25% increments for each year of continuous service and an option becomes fully vested upon the optionee’s completion of the fourth year of service. The contractual term for the options awarded is 10 years. For the nine months ended September 30, 2017 and 2016, we recognized $0.7 million and $0.9 million, respectively, in compensation expense related to these stock options. The fair value of each option award granted is estimated on the date of grant using the Black-Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.35		%

On December 1, 2013, we granted 699,820 stock option awards to certain key employees which were scheduled to vest in four substantially equal annual installments, subject to service and performance requirements and acceleration upon a change in control. As of September 30, 2016, the performance requirement was not considered to be probable of achievement for any of the outstanding option awards and 114,456 options were forfeited during the year ended December 31, 2016. Accordingly, we have not recognized any compensation expense related to these stock options as of September 30, 2016. Effective March 16, 2017, we terminated the options in connection with the IPO and approved a cash bonus totaling $5.1 million to the holders of the options.

The contractual term for the options awarded is 10 years. The fair value of each option award granted is estimated on the date of grant using the Black-Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.83		%

On July 19, 2016, we granted 1,274,549 stock option awards to certain key employees and directors which are scheduled to vest in five substantially equal semi-annual installments commencing in December 2016, subject to a continuing services requirement. The contractual term for the options awarded is 10 years. For the nine months ended September 30, 2017, we recognized the remaining $1.8 million in stock compensation expense related to these stock options, as the Company fully accelerated vesting of the options in connection with the IPO, and for the nine months ended September 30, 2016, we recognized $0.2 million in stock compensation expense related to these stock options.

The fair value of each option award granted is estimated on the date of grant using the Black- Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	55		%
Expected dividends	$	—
Expected term (in years)	5.8
Risk free rate	1.22		%

In March 2017, our shareholders approved the ProPetro 2017 Incentive Award Plan ("IAP") pursuant to which our Board of Directors may grant stock options, restricted stock units ("RSUs"), performance stock units ("PSUs"), or other stock-based awards to key employees, consultants, directors and employees. The IAP authorizes up to 5,800,000 shares of common stock to be issued under awards granted pursuant to the plan. On March 16, 2017, we granted 793,738 stock option awards to certain key employees and directors pursuant to the IAP which are scheduled to vest in four substantially equal annual installments, subject to a continuing service requirement. The contractual term for the options awarded is 10 years. For the nine months ended September 30, 2017 and 2016, we recognized $0.4 million and $0, in stock compensation expense related to these stock option awards.

The fair value of each stock option award granted is estimated on the date of grant using the Black- Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	18		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	2.23		%

A summary of the stock option activity for the nine months ended September 30, 2017 and the year ended December 31, 2016, is presented below.

	Number of Shares		Weighted Average Exercise Price		Weighted Average Grant-Date Fair Value
Outstanding at January 1, 2016	3,485,791		$	3.96	$	1.77
Granted	1,274,549		$	2.25	$	1.77
Exercised	—		$	—	$	—
Forfeited	(114,456	)	$	3.96	$	1.77
Expired	—		$	—	$	—
Canceled	—		$	—	$	—
Outstanding at December 31, 2016	4,645,884		$	3.49	$	1.77
Exercisable at December 31, 2016	2,354,466		$	3.77	$	1.77
Outstanding at January 1, 2017	4,645,884		$	3.49	$	1.77
Granted	793,738		$	14.00	$	3.35
Exercised	(226,194	)	$	3.96	$	1.77
Forfeited	(5,148	)	$	14.00	$	3.35
Expired	—		$	—	$	—
Canceled	(571,927	)	$	3.96	$	1.77
Outstanding at September 30, 2017	4,636,353		$	5.20	$	2.04
Exercisable at September 30, 2017	3,847,763		$	3.39	$	1.77

Restricted Stock Units (Non-Vested Stock) and Performance Stock Units

On September 30, 2013, our Board of Directors authorized and granted 372,335 restricted stock units (RSUs) to a key executive. Each RSU represents the right to receive one share of common stock of the Company at par value $0.001 per share. Under the terms of the award, the shares of common stock subject to the RSUs were to be paid to the grantee upon change in control, regardless of whether the grantee was affiliated with the Company on the settlement date. The fair value of the RSUs is measured as the price of the Company’s shares on the grant date, which was estimated to be $3.89. The share price used to estimate the fair value of the RSU at the grant date was based on a combination of income and market approaches, which are highly complex and sensitive. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value of the Company’s stock. Effective March 22, 2017, the Board of Directors canceled these RSUs and issued 372,335 new RSUs to the grantee. These issued RSUs are effectively identical to the RSUs granted in 2013, provided, however, that the RSUs will now be payable in full on March 22, 2018. The fair value of the RSUs issued on March 22, 2017, was based on the Company's stock market price at the grant date. In connection with the IPO, we fully recognized the stock compensation expense related to the re-issued RSUs.

On June 5, 2017, our Board of Directors granted 319,250 RSUs to employees, directors and executives pursuant to the IAP. Each RSU represents the right to receive one share of common stock. The fair value of the RSUs is based on the closing share price of our common stock on the date of grant. During the nine months ended September 30, 2017 and 2016, the recorded stock compensation expense for all RSUs was $5.8 million and $0, respectively.

The following table summarizes RSUs activity during the nine months ended September 30, 2017:

	Number of Shares		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2017	372,335		$	3.89
Granted	691,585		$	13.65
Vested	—		$	—
Exercised	—		$	—
Forfeited	(1,170	)	$	13.65
Expired	—		$	—
Canceled	(372,335	)	$	3.89
Outstanding at September 30, 2017	690,415		$	13.65

Effective June 5, 2017, our Board of Directors authorized and granted performance stock unit awards to certain key employees under the IAP. The actual number of shares that may be issued under the performance stock unit awards ranges from zero up to a maximum of twice the target number of performance stock unit awards granted to the participant, based on our total shareholder return relative to a designated peer group from the date of our IPO through December 31, 2019. Compensation expense is recorded ratably over the corresponding requisite service period. The fair value of performance stock unit awards is determined using a Monte Carlo probability model. Grant recipients do not have any shareholder rights until performance relative to the peer group has been determined following the completion of the performance period and shares have been issued. During the nine months ended September 30, 2017 and 2016 the recorded stock compensation expense for the performance stock units was $0.2 million and $0, respectively.

The following table summarizes information about the performance stock units that were outstanding at September 30, 2017:

Period Granted	Target Shares Outstanding at Beginning of Period	Target Shares Granted	Target Shares Vested	Target Shares Forfeited	Target Shares Outstanding at End of Period	Weighted Average Grant Date Fair Value per Share
2017	—	169,635	—	—	169,635	$	10.73
Total	—	169,635	—	—	169,635

The total stock compensation expense for the nine months ended September 30, 2017 and 2016 for all stock awards was $8.7 million and $1.1 million, respectively. The total unrecognized compensation expense as of September 30, 2017 is approximately $7.5 million, and is expected to be recognized over a weighted-average period of approximately 2.9 years.

STOCK‑BASED COMPENSATION

Stock Options — Effective March 4, 2013, the Company adopted the Stock Option Plan of Holding (the “Plan”) pursuant to which the Company’s Board of Directors may grant stock options or other stock‑based awards to key employees, consultants, and directors. The Plan, as amended, is authorized to grant up to 4,645,884 shares of common stock to be issued upon exercise of the options. The Company’s share price used to estimate the fair value of the option at the grant date was based on a combination of income and market approaches, which are highly complex and sensitive. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value of the Company’s stock. The expected term used to calculate the fair value of all options considers the vesting date and the grant’s expiration date. The expected volatility was estimated by considering comparable public companies, and the risk free rate is based on the U.S. treasury yield curve as of the grant date. The dividend assumption is based on historical experience. The fair value and estimates will no longer be necessary if the Company goes public because it will rely on the market price to determine the market value of its common stock. Prior to 2015, the Company had granted a total of 3,499,228 options with an exercise price of $3.96 per option, and all options expire 10 years from the date of grant.

On June 14, 2013, the Company granted 2,799,408 stock option awards to certain key employees and directors that shall vest and become exercisable based upon the achievement of a service requirement. The options vest in 25% increments for each year of continuous service and an option becomes fully vested upon the optionee’s completion of the fourth year of service. The contractual term for the options awarded is 10 years. For the years ended December 31, 2016 and 2015, the Company recognized $1.2 million in compensation expense related to these stock options.

The fair value of each option award granted is estimated on the date of grant using the Black‑Scholes option‑pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.35

On December 1, 2013, the Company granted 699,820 stock option awards to certain key employees that shall vest and become exercisable based upon the achievement of both a service and a performance requirement. The options vest in 25% increments for each year of continuous service and an option becomes fully vested upon a change in control. As of December 31, 2016, the performance requirement was not considered to be probable of achievement for any of the outstanding option awards and 114,456 options were forfeited during the year ended December 31, 2016. Accordingly, the Company has not recognized any compensation expense related to these stock options. The contractual term for the options awarded is 10 years.

The fair value of each option award granted is estimated on the date of grant using the Black‑Scholes option‑pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.83		%

On July 19, 2016, the Company’s Board of Directors authorized and granted 1,274,549 stock option awards to certain key employees and directors that shall vest and become exercisable based upon the achievement of a service requirement. The options vest in 20% increments for each six months of continuous service with December 2016 being the first vesting period and the options become fully vested as of December 31, 2018. The contractual term for the options awarded is 10 years. For the year ended December 31, 2016, the Company recognized $0.4 million in compensation expense related to these stock options.

The fair value of each option award granted is estimated on the date of grant using the Black‑Scholes option‑pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	55		%
Expected dividends	$	—
Expected term (in years)	5.8
Risk free rate	1.22		%

The total stock compensation expense for the years ended December 31, 2016 and 2015 for all stock options was $1.6 million and $1.2 million, respectively. The tax benefit related to the stock compensation expense recorded for the years ended December 31, 2016 and 2015 was $0.6 million and $0.4 million, respectively. The total unrecognized compensation expense as of December 31, 2016 is $2.4 million, and is expected to be recognized over a weighted‑average period of approximately 1.6 years.

The outstanding options at January 1, 2015 were 3,485,791 as 13,437 options were forfeited in 2014. As of December 31, 2016, none of the options are fully vested. A summary of the stock option activity for the years ended December 31, 2016 and 2015 is presented below.

	Number of Shares		Weighted Average Exercise Price		Weighted Average Grant‑Date Fair Value
Outstanding at January 1, 2015	3,485,791		$	3.96	$	1.77
Granted	—		$	—	$	—
Exercised	—		$	—	$	—
Forfeited	—		$	—	$	—
Expired	—		$	—	$	—
Outstanding at December 31, 2015	3,485,791		$	3.96	$	1.77
Exercisable at December 31, 2015	1,399,704		$	3.96	$	1.77
Outstanding at January 1, 2016	3,485,791		$	3.96	$	1.77
Granted	1,274,549		$	2.25	$	1.77
Exercised	—		$	—	$	—
Forfeited	(114,456	)	$	3.96	$	1.77
Expired	—		$	—	$	—
Outstanding at December 31, 2016	4,645,884		$	3.49	$	1.77
Exercisable at December 31, 2016	2,354,466		$	3.77	$	1.77

Restricted Stock Units — On September 30, 2013, the Company’s Board of Directors authorized and granted 372,335 Restricted Stock Units (RSUs) to a key executive. Each RSU represents the right to receive one share of common stock of the Company at par value $0.001 per share. The shares of common stock subject to the RSUs shall be paid to the grantee upon change in control, whether or not grantee is an employee, consultant, or director of the Company on such date. If the grantee ceases to be an employee, consultant, or director of the Company prior to the settlement date, he shall not forfeit any rights with respect to the RSUs and shall be entitled to receive payment on the settlement date. The fair value of the RSUs is measured as the price of the Company’s shares on the grant date, which was estimated to be $3.89. The Company’s share price used to estimate the fair value of the RSU at the grant date was based on a combination of income and market approaches, which are highly complex and sensitive. The income approach involves the use of a discounted cash flow method, with the cash flow projections discounted at an appropriate discount rate. The market approach involves the use of comparable public companies market multiples in estimating the fair value of the Company’s stock. As of December 31, 2016, the RSUs were not vested as the performance requirement was not considered to be probable of achievement. Accordingly, the Company has not recognized any compensation expense related to these RSUs. There have been no additional RSUs granted, vested or forfeited since September 30, 2013.

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Income Taxes

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Income Taxes

INCOME TAXES

The components of the provision for income taxes for the year ended December 31, 2016 and 2015 are as follows:

	2016			2015
Federal:
Current	$	—		$	(1,092,437	)
Deferred	(29,082,057		)	(22,176,578		)
	(29,082,057		)	(23,269,015		)
State:
Current	—			(350,494		)
Deferred	1,110,475			(1,768,061		)
	1,110,475			(2,118,555		)
Total benefit	$	(27,971,582	)	$	(25,387,570	)

Reconciliation between the amounts determined by applying the federal statutory rate of 35% to income tax benefit is as follows:

	2016			2015
Tax at federal statutory rate	$	(28,391,642	)	$	(24,934,089	)
State taxes, net of federal benefit	(215,952		)	(885,226		)
Permanent differences	498,131			578,837
Valuation allowance	878,522			—
Other	(740,641		)	(147,092		)
Total provision	$	(27,971,582	)	$	(25,387,570	)

Deferred tax assets and liabilities are recognized for estimated future tax effects of temporary differences between the tax basis of an asset or liability and its reported amount in the consolidated financial statements. The significant items giving rise to deferred tax assets (liabilities) at December 31, 2016 and 2015, respectively are as follows:

	2016			2015
Deferred Income Tax Assets
Accrued liabilities	334,072			471,223
Allowance for doubtful accounts	194,664			300,640
Goodwill and other intangible assets	10,953,458			13,021,523
Stock‑based compensation	1,692,288			1,119,355
Net operating losses	49,266,688			29,067,458
Other	388,813			388,813
Noncurrent deferred tax assets	$	62,829,983		$	44,369,012
Total deferred tax assets	$	62,829,983		$	44,369,012
Valuation allowance	(878,522		)	—
Total deferred tax assets — net	$	61,951,461		$	44,369,012
Deferred Income Tax Liabilities
Property and equipment	$	(60,958,408	)	$	(70,621,451	)
Prepaid expenses	(1,506,831		)	(1,498,531		)
Other	(634,692		)	(1,369,082		)
Noncurrent deferred tax liabilities	$	(63,099,931	)	$	(73,489,064	)
Net deferred tax liability	$	(1,148,470	)	$	(29,120,052	)

At December 31, 2016, the Company had approximately $175.6 million in net operating loss carryforwards for federal and state income tax purposes, which begin to expire in 2024. Utilization of net operating loss carryforwards may be limited due to past or future ownership changes. For the year ended December 31, 2016, we recorded a net valuation allowance of $0.9 million on the basis of management’s reassessment of the amount of its deferred tax assets that are more likely than not to be realized.

In June 2006, the FASB issued FASB Interpretation (FIN) No. 48, Accounting for Uncertainty in Income Taxes — an interpretation of FASB Statement No. 109 (subsequently codified as ASC 740‑10, Income Taxes, Under FASB Statement No. 168, The FASB Accounting Standards Codification and the Hierarchy of Generally Accepted Accounting Principles — a replacement of FASB Statement No. 162). ASC 740‑10 prescribes a comprehensive model for recognizing, measuring, presenting, and disclosing in the consolidated financial statements tax positions taken or expected to be taken on a tax return, including a decision to file or not to file in a particular jurisdiction.

The Company evaluated all tax positions and determined that the aggregate exposure under ASC 740‑10 did not have a material effect on the consolidated financial statements during the year ended December 31, 2016 or 2015. Therefore, no adjustments have been made to the consolidated financial statements related to the implementation of ASC 740‑10. The Company will continue to evaluate its tax positions in accordance with ASC 740‑10 and will recognize any future effect as a charge to income in the applicable period. Currently, the tax filings for years 2013 to 2015 remain open for examination by taxing authorities.

Income tax penalties and interest assessments recognized under ASC 740‑10 are accrued as a tax expense in the period that the Company’s taxes are in an uncertain tax position. Any accrued tax penalties or interest assessments will remain until the uncertain tax position is resolved with the taxing authorities or until the applicable statute of limitations has expired.

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Related-Party Transactions

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Related Party Transactions [Abstract]

Related-Party Transactions

Related-Party Transactions

The Company leases its corporate offices from a related party pursuant to a five-year lease agreement with a five-year extension option requiring a base rent of $0.07 million per year. The Company also leases five properties adjacent to the corporate office from related parties with annual base rents of $0.03 million, $0.03 million, $0.09 million, $0.09 million, and $0.18 million.

For the nine months ended September 30, 2017 and 2016, the Company paid approximately $0.21 million and $0.12 million, respectively, for the use of transportation services from a related party. The Company also rents equipment in Elk City, Oklahoma from a related party. For the the nine months ended September 30, 2017 and 2016, the Company paid $0.14 million and $0.14 million, respectively.

At September 30, 2017 and December 31, 2016, the Company had $0 million and $0 in payables, respectively, and approximately $0.04 million and $0.04 million in receivables, respectively, for related parties for services provided.

All agreements pertaining to real property and equipment were entered into during periods where the Company had limited liquidity and related parties secured them on behalf of the Company. All related party transactions are immaterial and have not been separately shown on the face of the financial statements.

For related party disclosure related to equity transactions with ECP, see Note 10.

RELATED‑PARTY TRANSACTIONS

The Company leases its corporate offices from a related party pursuant to a five‑year lease agreement with a five‑year extension option requiring a base rent of $72,000 per year. The Company also leases five properties adjacent to the corporate office from related parties with annual base rents of $30,000, $30,000, $90,000, $90,000, and $180,000.

For the years ended December 31, 2016 and 2015, the Company paid approximately $186,000 and $164,000, respectively, for the use of transportation services from a related party.

The Company also rents equipment in Elk City, Oklahoma from a related party. For the years ended December 31, 2016 and 2015, the Company paid $192,000 and $192,000, respectively.

At December 31, 2016 and 2015, the Company had $0 and $0 in payables, respectively, and approximately $35,000 and $18,000 in receivables, respectively, for related parties for services provided.

All agreements pertaining to realty property and equipment were entered into during periods where the Company had limited liquidity and related parties secured them on behalf of the Company. All related party transactions are immaterial and have not been separately shown on the face of the financial statements.

For related party disclosure related to equity transactions with Energy Capital Partners, see Note 18.

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Commitments and Contingencies

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Operating Lease

We have various operating leases for office space and certain property and equipment. For the nine months ended September 30, 2017 and 2016, we recorded operating lease expense of $1.0 million and $1.0 million, respectively. Required remaining lease payments for each fiscal year are as follows:

($ in thousands)
2017	$	116
2018	426
2019	366
2020	344
2021 and thereafter	774
Total	$	2,026

Contingent Liabilities

We may be subject to various legal actions, claims, and liabilities arising in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a materially adverse effect on our financial position, results of operations, or liquidity.

COMMITMENTS AND CONTINGENCIES

Operating Lease — The Company has various operating leases for office space and certain property and equipment. For the years ended December 31, 2016 and 2015, the Company recorded operating lease expense of $1.4 million for each of the periods. Required remaining lease payments for each fiscal year are as follows:

2017	$	471,416
2018	426,416
2019	366,416
2020	343,916
2021 and thereafter	773,812
Total	$	2,381,976

Contingent Liabilities — The Company may be subject to various legal actions, claims, and liabilities arising in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a materially adverse effect on the Company’s financial position, results of operations, or liquidity.

Required remaining lease payments for each fiscal year are as follows:

2017	$	471,416
2018	426,416
2019	366,416
2020	343,916
2021 and thereafter	773,812
Total	$	2,381,976

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Equity Capitalization

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Equity [Abstract]

Equity Capitalization

Equity Capitalization

Credit Amendment Equity Infusion

In connection with the Term Loan and Revolving Credit Facility amendment dated June 8, 2016 (see Note 4), ECP and its related affiliates along with other shareholders infused $40.425 million of equity into the Company and we issued 18,007,328 additional shares of common stock.

Convertible Preferred Stock

On December 27, 2016, we completed a private placement offering of $170.0 million, issuing 16,999,990 shares of Series A nonparticipating convertible preferred stock, par value $0.001 per share. Costs associated with the offering were approximately $7.0 million, resulting in net proceeds to the Company of approximately $163.0 million.

As of December 31, 2016, 16,999,990 shares of Series A convertible preferred stock were issued and outstanding, convertible into common stock at the conversion price per the private placement agreement. Upon the consummation of the IPO, the Series A Preferred stock automatically converted into common stock.

Initial Public Offering

On March 22, 2017, we consummated our IPO in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold by the Company and 11,750,000 shares sold by existing stockholders. We received net proceeds of approximately $170.1 million after deducting $10.9 million of underwriting discounts and commissions, and $4.5 million of other offering expenses. At closing, we used the proceeds (i) to repay $71.8 million in outstanding borrowings under the term loan, (ii) to fund the purchase of additional hydraulic fracturing fleets and ancillary equipment, and (iii) for general corporate purposes. In connection with the IPO, all 16,999,990 shares of our outstanding Series A Preferred Stock converted to common stock on a 1:1 basis.

Additionally, on March 28, 2017, one executive and one director net settled a total of 226,194 of their exercisable stock options and received 162,212 shares of common stock.

At September 30, 2017 and December 31, 2016, the Company had 83,039,854 and 52,627,652 shares outstanding, respectively.

EQUITY CAPITALIZATION

Common Stock

At December 31, 2015, ECP and its related affiliates held 30,438,955 of the 34,992,662 outstanding common shares of the Company.

Per the amended credit agreement executed on June 8, 2016 (see Note 9), the majority shareholder, Energy Capital Partners, and its related affiliates along with other shareholders infused $40.425 million of equity into the Company and the Company issued 18,007,328 additional shares of stock. On June 8, 2016, 17,817,925 shares of stock were issued followed by 189,403 on July 13, 2016. As of December 31, 2016, the Company has 52,627,652 common shares outstanding and ECP and its related affiliates hold 48,330,667, increasing ECP ownership interest to 91.8%. The remaining outstanding common shares of the Company are held by management and two prior lenders to the Company.

Convertible Preferred Stock

On December 27, 2016, the Company completed a private placement offering of $170 million, issuing 16,999,990 shares of Series A nonparticipating convertible preferred stock, par value $.001 per share. Costs associated with the offering were approximately $7 million, resulting in net proceeds to the Company of $163 million.

As of December 31, 2016, 16,999,990 shares of Series A convertible preferred stock were issued and outstanding, convertible into common stock at the conversion price per the private placement agreement. Upon a qualifying initial public offering, the Series A Preferred Shares will automatically convert into common stock at a conversion price equal to the lesser of $10.00 per Series A Preferred Share or 90% of the initial public offering price of the common stock. The Company has retained investment bankers with the intention of an initial public offering.

Each share of series A convertible preferred stock is entitled to accrue dividends at the rate of 7% per annum, beginning July 1, 2017. Accrued dividends are payable, in cash or kind, in arrears at a date that is 30 days after the end of each month. Upon the occurrence of any liquidation, dissolution or winding up of the Company, series A preferred stockholders will be entitled to receive an amount equal to the liquidation preference thereon, in preference to the common stockholders, and before any payment or distribution is made on, any junior stock.

Each share of series A preferred stock is entitled to a number of votes per share on an as‑converted basis equal to the number of shares of common stock into which such shares of series A preferred stock is convertible.

On March 22, 2017, we completed our IPO in which 25,000,000 shares of our common stock, par value $0.001 per share, were sold at a public offering price of $14.00 per share, with 13,250,000 shares issued and sold by the Company and 11,750,000 shares sold by existing stockholders. In connection with the IPO, the Company executed a stock split, such that each holder of common stock of the Company received 1.45 shares of common stock for every one share of previous common stock, and all 16,999,990 shares of our outstanding Series A Preferred Stock converted to common stock on a 1:1 basis.

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Significant Accounting Policies (Policies)

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Accounting Policies [Abstract]

Basis of Presentation

The accompanying condensed consolidated financial statements of ProPetro Holding Corp. and its subsidiary (the "Company," "we," "us" or "our") have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission ("SEC") for interim financial information and do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America ("GAAP") for annual financial statements. Those adjustments (which consisted of normal recurring accruals) that are, in the opinion of management, necessary for a fair presentation of the results of the interim periods have been made. Results of operations for such interim periods are not necessarily indicative of the results of operations for a full year due to changes in market conditions and other factors. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2016 included in the final prospectus of the Company filed with the SEC pursuant to rule 424(b) under the Securities Act of 1933 on March 20, 2017 ("Prospectus").

Basis of Presentation — The accompanying consolidated financial statements and related notes have been prepared pursuant to the rules and regulations of the Securities Exchange Commission (SEC) and in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”).

Fair Value Measurement

Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the "exit price") in an orderly transaction between market participants at the measurement date.

In determining fair value, the Company uses various valuation approaches and establishes a hierarchy for inputs used in measuring fair value that maximizes the use of relevant observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used, when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company's assumptions about the assumptions other market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on the observability of inputs as follows:

Level 1 — Valuations based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Valuation adjustments and block discounts are not applied to Level 1 instruments. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these instruments does not entail a significant degree of judgment.

Level 2 — Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.

Level 3 — Valuations based on inputs that are unobservable and significant to the overall fair value measurement.

A financial instrument's categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Our financial instruments include cash and cash equivalents, accounts receivable, accounts payable, and a derivative financial instrument. The estimated fair value of our financial instruments — cash and cash equivalents, accounts receivable and accounts payable at September 30, 2017 and December 31, 2016 approximates their carrying value as reflected in our condensed consolidated balance sheets due to their short-term nature. We use a derivative financial instrument, an interest rate swap, to manage interest rate risk. Our policies do not permit the use of derivative financial instruments for speculative purposes. We did not designate the interest rate swap as a hedge for accounting purposes. We record all derivatives as of the end of our reporting period in our condensed consolidated balance sheet at fair value, which is based on quoted market prices, a Level 1 input. We may be exposed to credit losses in the event of nonperformance by counterparties to the interest rate swap. The counterparty of the interest rate swap is a credible, large institution, and we do not believe there is significant or material credit risk upon settlement of the contract.

FAIR VALUE MEASUREMENTS

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the “exit price”) in an orderly transaction between market participants at the measurement date.

In determining fair value, the Company uses various valuation approaches and establishes a hierarchy for inputs used in measuring fair value that maximizes the use of relevant observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used, when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the assumptions other market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on the observability of inputs as follows:

Level 1 — Valuations based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. Valuation adjustments and block discounts are not applied to Level 1 instruments. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these instruments does not entail a significant degree of judgment.

Level 2 — Valuations based on one or more quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.

Level 3 — Valuations based on inputs that are unobservable and significant to the overall fair value measurement.

A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

Principles of Consolidation

Principles of Consolidation — The accompanying consolidated financial statements include the accounts of Holding and its wholly owned subsidiary, Services. All intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates

Use of Estimates — Management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and revenues and expenses during the reporting period. Such estimates include, but are not limited to, allowance for doubtful accounts, depreciation of property and equipment, estimates of fair value of property and equipment, estimates related to fair value of reporting units for purposes of assessing goodwill, estimates related to deferred tax assets and liabilities, including any related valuation allowances, and estimates of fair value of stock‑based compensation. Actual results could differ from those estimates.

Revenue Recognition

Revenue Recognition — The Company’s services are sold based upon contracts or other agreements with the customer that include fixed or determinable prices and do not include other post‑delivery obligations. Revenue for services is recognized as the services are rendered and when collectability is reasonably assured. Rates for services are typically determined per the contract or agreement with customers.

Pressure Pumping — Pressure pumping consists of downhole pumping services including hydraulic fracturing, acidizing and cementing. The Company recognizes revenues when services are performed, collection of the receivables is probable, and a price is fixed or determinable. The Company prices services for its pressure pumping by the job, project or day depending on the type of service performed and request from the customer.

Drilling Services — Drilling services consists of surface air drilling and Permian drilling, whereby we drill a well for a customer to a certain depth using a drilling rig and related equipment. The Company recognizes revenues either on a “turnkey” contract basis, in which a fixed and set price for the job is determinable, on a “daywork” contract basis, in which a stated rate per day is fixed and determinable, or on a “footage” contract basis, in which a rate per feet drilled is fixed and determinable.

Other Completion & Production Services — Other completion & production services consists of coil tubing and flowback services whereby the Company recognizes revenues when services are performed either on a per job or per day or hourly rate, collections of receivables are probable, and a price is fixed or determinable.

Cash and Cash Equivalents

Cash and Cash Equivalents — The Company considers highly liquid investments with initial maturities of three months or less to be cash equivalents.

Accounts Receivable

Accounts Receivable — Accounts receivables are stated at the amount billed and billable to customers. The Company’s allowance for doubtful accounts is based on management’s evaluations of the collectability of each accounts receivable based on the customer’s payment history and general economic conditions.

Inventories

Inventories — Inventories, which consists only of raw materials, are stated at lower of average cost or market.

Property and Equipment

Property and Equipment — The Company’s property and equipment are recorded at cost, less accumulated depreciation.

Upon sale or retirement of property and equipment, the cost and related accumulated depreciation are removed from the balance sheet and the net amount, less proceeds from disposal, is recognized as a gain or loss in the statement of operations.

Depreciation

Depreciation — Depreciation of property and equipment is provided on the straight‑line method over the following estimated useful lives:

Vehicles	1 ‑ 5 years
Equipment	2 ‑ 20 years
Leasehold improvements	5 ‑ 20 years

Impairment of Long-Lived Assets

The Company accounts for long‑lived assets to be disposed of at the lower of their carrying amount or fair value, less cost to sell once management has committed to a plan to dispose of the assets.

Impairment of Long‑Lived Assets — In accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 360, Accounting for the Impairment or Disposal of Long‑Lived Assets, the Company reviews its long‑lived assets to be held and used whenever events or circumstances indicate that the carrying value of those assets may not be recoverable.

An impairment loss is indicated if the sum of the expected future undiscounted cash flows attributable to the asset group is less than the carrying amount of such asset group. In this circumstance, the Company recognizes an impairment loss for the amount by which the carrying amount of the asset group exceeds the fair value of the asset group.

Goodwill

Goodwill — Goodwill is the excess of the consideration transferred over the fair value of the tangible and identifiable intangible assets and liabilities recognized. Goodwill is not amortized. We perform an annual impairment test of goodwill as of December 31, or more frequently if circumstances indicate that impairment may exist. The determination of impairment is made by comparing the carrying amount of a reporting unit with its fair value, which is generally calculated using a combination of market and income approaches. If the fair value of the reporting unit exceeds the carrying value, no further testing is performed. If the fair value of the reporting unit is less than the carrying value, the implied fair value of reporting unit goodwill is calculated. The Company then compares the carrying value of goodwill to its implied fair value. In estimating the implied fair value of goodwill at the reporting unit, the Company assigns the fair value of the reporting unit to all of the assets and liabilities associated with the reporting unit as if the reporting unit had been acquired in a business combination. The excess of the fair value of the reporting unit over the amount assigned to the assets and liabilities of the reporting unit is the implied fair value of goodwill. If the carrying amount of goodwill exceeds the implied fair value of goodwill, an impairment loss is recognized for that difference.

Intangible Assets

Intangible Assets — Intangible assets with finite useful lives are amortized on a basis that reflects the pattern in which the economic benefits of the intangible assets are realized, which is generally on a straight‑line basis over the asset’s estimated useful life.

Income Taxes

Income Taxes — Income taxes are accounted for under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of differences between the consolidated financial statements and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.

We recognize deferred tax assets to the extent that we believe these assets are more likely than not to be realized. In making such a determination, we consider all positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, and the results of recent operations. If we determine that we would be able to realize our deferred tax assets in the future in excess of their net recorded amount, we would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes.

Advertising Expense

Advertising Expense — All advertising costs are expensed as incurred.

Deferred Loan Costs

eferred Loan Costs — The Company capitalized certain costs in connection with obtaining its borrowings, including lender, legal, and accounting fees. These costs are being amortized over the term of the related loan using the straight‑line method (which approximates the interest method). Deferred loan costs amortization is included in interest expense. Unamortized deferred loan costs associated with loans paid off or refinanced with different lenders are charged off in the period in which such an event occurs. Deferred loan costs are classified as a reduction of long‑term debt in the consolidated balance sheet. Amortization of deferred loan costs is recorded as interest expense in the statement of operations

Stock Based Compensation

Stock Based Compensation — The Company recognizes the cost of stock‑based awards on a straight‑line basis over the requisite service period of the award, which is usually the vesting period under the fair value method. Total compensation cost is measured on the grant date using fair value estimates.

Insurance Financing

Insurance Financing — The Company annually renews their commercial insurance policies and records a prepaid insurance asset and amortizes it monthly over the coverage period. The Company may choose to finance a portion of the premiums and will make repayments monthly over ten months in equal installments.

Going Concern

Going Concern — The Company annually evaluates its ability to continue as a going concern as required by Accounting Standards Update (ASU) No. 2014‑15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern and if necessary, provides disclosures if there is any substantial doubt about its ability to continue as a going concern.

Concentration of Credit Risk

Concentration of Credit Risk — The Company’s assets that are potentially subject to concentrations of credit risk are cash and cash equivalents and trade accounts receivable. Cash balances are maintained in financial institutions, which at times exceed federally insured limits. The Company monitors the financial condition of the financial institutions in which accounts are maintained and has not experienced any losses in such accounts. The receivables of the Company are spread over a number of customers, a majority of which are operators and suppliers to the oil and natural gas industries. The Company performs ongoing credit evaluations as to the financial condition of its customers with respect to trade receivables.

Recently Issued Accounting Standards

Recently Issued Accounting Standards — In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014‑09, Revenue from Contracts with Customers (Topic 606). ASU No. 2014‑09 requires entities to recognize revenue to depict transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU No. 2014‑09 requires entities to disclose both qualitative and quantitative information that enables users of consolidated financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, including disclosure of significant judgments affecting the recognition of revenue. ASU No. 2014‑09 was originally effective for annual periods beginning after December 15, 2016, using either the retrospective or cumulative effect transition method. On August 12, 2015, the FASB issued ASU No. 2015‑14, which defers the effective date of the revenue standard, ASU No. 2014‑09, by one year for all entities and permits early adoption on a limited basis. The Company believes that the adoption of this guidance will not materially affect the Company’s revenue recognition. However, the Company will continue to evaluate and quantify the effect of the adoption of this guidance on its consolidated financial statements.

On July 22, 2015, the FASB issued ASU No. 2015‑11, Simplifying the Measurement of Inventory, which requires entities to measure most inventory “at the lower of cost and net realizable value,” thereby simplifying the current guidance under which an entity must measure inventory at the lower of cost or market. ASU No. 2015‑11 does not apply to inventories that are measured by using either the last‑in, first‑out method or the retail inventory method. The amendments in ASU No. 2015‑11 are effective for fiscal years beginning after December 15, 2016. The Company is currently evaluating the effect of the adoption of this guidance on the consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016‑02, Leases, a new standard on accounting for leases. The ASU introduces a lessee model that brings most leases on the balance sheet. The new standard also aligns many of the underlying principles of the new lessor model with those in the current accounting guidance as well as the FASB’s new revenue recognition standard. However, the ASU eliminates the use of bright‑line tests in determining lease classification as required in the current guidance. The ASU also requires additional qualitative disclosures along with specific quantitative disclosures to better enable users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The pronouncement is effective for annual reporting periods beginning after December 15, 2018, including periods within that reporting period, using a modified retrospective approach. Early adoption is permitted. The Company has not completed an evaluation of the impact the pronouncement will have on our consolidated financial statements and related disclosures.

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Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Property and equipment

Depreciation of property and equipment is provided on the straight‑line method over the following estimated useful lives:

Vehicles	1 ‑ 5 years
Equipment	2 ‑ 20 years
Leasehold improvements	5 ‑ 20 years

Property and equipment consisted of the following at December 31, 2016 and 2015, respectively:

	2016		2015
Equipment and vehicles	$	402,640,458	$	399,084,240
Leasehold improvements	4,500,406		5,003,838
Subtotal	407,140,864		404,088,078
Less accumulated depreciation	143,279,219		112,249,580
Property and equipment — net	$	263,861,645	$	291,838,498

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Supplemental Cash Flow Disclosures (Tables)

12 Months Ended

Dec. 31, 2016

Supplemental Cash Flow Elements [Abstract]

Supplemental cash flow disclosures

	December 31, 2016		December 31, 2015
Supplemental cash flows disclosures
Interest paid	$	18,248,687	$	20,531,410
Income taxes paid	$	2,897	$	1,295,173
Supplemental disclosure of non‑cash activities
Capital expenditures included in accounts payable	$	3,176,356	$	8,821,227

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Fair Value Measurements (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Assets measured at fair value on a nonrecurring basis

Assets measured at fair value on a nonrecurring basis at September 30, 2017 and December 31, 2016, respectively, are set forth below:

			Estimated fair value measurements
	Balance		Quoted prices in active market (Level 1)		Significant other observable inputs (Level 2)		Significant other unobservable inputs (Level 3)		Total gains (losses)
($ in thousands)
September 30, 2017:
Property and equipment, net	$	—	$	—	$	—	$	—	$	—
Goodwill	$	—	$	—	$	—	$	—	$	—
December 31, 2016:
Property and equipment, net	$	8,700	$	—	$	8,700	$	—	$	(6,305	)
Goodwill	$	9,425	$	—	$	—	$	9,425	$	(1,177	)

Assets measured at fair value on a nonrecurring basis at December 31, 2016 and 2015, respectively, are set forth below:

			Estimated fair value measurements
	Carrying Value		Quoted prices in active market (Level 1)		Significant other observable inputs (Level 2)		Significant other unobservable inputs (Level 3)		Total gains (losses)
2016:
Property and equipment, net	$	8,700,000	$	—	$	8,700,000	$	—	$	(6,305,426	)
Goodwill	$	9,424,999	$	—	$	—	$	9,424,999	$	(1,177,148	)
2015:
Property and equipment, net	$	291,838,498	$	—	$	291,838,498	$	—	$	(36,609,332	)

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Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets subject to amortization

The Company’s intangible assets subject to amortization are as follows:

	2016		2015
Internally developed software	$	1,439,941	$	1,439,941
Less accumulated amortization	850,902		562,914
Intangible assets — net	$	589,039	$	877,027

Estimated remaining amortization expense

Estimated remaining amortization expense for each of the subsequent fiscal years is expected to be as follows:

Year	Estimated Future Amortization Expense
2017	$	287,988
2018	287,988
2019	13,063
Total	$	589,039

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Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Property and equipment

Depreciation of property and equipment is provided on the straight‑line method over the following estimated useful lives:

Vehicles	1 ‑ 5 years
Equipment	2 ‑ 20 years
Leasehold improvements	5 ‑ 20 years

Property and equipment consisted of the following at December 31, 2016 and 2015, respectively:

	2016		2015
Equipment and vehicles	$	402,640,458	$	399,084,240
Leasehold improvements	4,500,406		5,003,838
Subtotal	407,140,864		404,088,078
Less accumulated depreciation	143,279,219		112,249,580
Property and equipment — net	$	263,861,645	$	291,838,498

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Long-Term Debt (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Debt Disclosure [Abstract]

Schedule of debt

Total debt consisted of the following at September 30, 2017 and December 31, 2016, respectively:

($ in thousands)	2017		2016
ABL Credit Facility	$	25,000	$	—
6.25% "Term loan" due September 2019	—		146,750
Revolving Credit Facility	—		13,500
Equipment financing	16,917		19,193
Total debt	41,917		179,443
Less deferred loan costs, net of amortization	—		3,116
Subtotal	41,917		176,327
Less current portion of long-term debt	7,441		16,920
Total long-term debt, net of deferred loan costs	$	34,476	$	159,407

Total debt consisted of the following notes at December 31, 2016 and 2015, respectively:

	2016		2015
6.25% Term loan due September 2019	$	146,750,000	$	195,250,000
Revolving credit facility	13,500,000		38,500,000
Equipment refinancing	19,192,838		24,488,140
Total debt	179,442,838		258,238,140
Less deferred loan costs, net of amortization	3,115,679		5,067,009
Subtotal	176,327,159		253,171,131
Less current portion of long‑term debt	16,920,074		16,295,302
Total long‑term debt, net of deferred loan costs	$	159,407,085	$	236,875,829

Annual maturities of debt

Scheduled remaining annual maturities of total debt are as follows at September 30, 2017:

($ in thousands)
2017	$	1,778
2018	14,298
2019	805
2020	36
2021 and thereafter	25,000
Total	$	41,917

Scheduled annual maturities of total debt are as follows at December 31, 2016:

2017	$	16,920,074
2018	37,772,764
2019	124,750,000
Total	$	179,442,838

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Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2016

Other Liabilities Disclosure [Abstract]

Accrued liabilities

Accrued liabilities consisted of the following at December 31, 2016 and 2015, respectively:

	2016		2015
Accrued insurance	$	2,900,221	$	2,778,368
Accrued payroll and related expenses	4,728,614		1,256,269
Other	5,990,636		3,017,278
Total	$	13,619,471	$	7,051,915

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Reportable Segment Information (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Segment Reporting [Abstract]

Reconciliation of segment information

Reconciliation of net income (loss) to adjusted EBITDA:

	Three months ended September 30, 2017									Nine months ended September 30, 2017
($ in thousands)	Pressure Pumping			All Other			Total			Pressure Pumping			All Other			Total
Net income (loss)	$	28,372		$	(6,407	)	$	21,965		$	30,087		$	(27,552	)	$	2,535
Depreciation and amortization	13,637			1,108			14,745			35,228			3,374			38,602
Interest expense	—			644			644			—			6,469			6,469
Income tax (benefit) expense	—			(96		)	(96		)	—			128			128
Loss on disposal of assets	7,552			1,190			8,742			27,943			1,028			28,971
Stock-based compensation	—			751			751			—			8,730			8,730
Other expense	—			191			191			—			792			792
Other general and administrative expense (1)	—			149			149			—			722			722
Deferred IPO bonus expense	452			225			677			5,038			2,668			7,706
Adjusted EBITDA	$	50,013		$	(2,245	)	$	47,768		$	98,296		$	(3,641	)	$	94,655
	Three months ended September 30, 2016									Nine months ended September 30, 2016
($ in thousands)	Pressure Pumping			All Other			Total			Pressure Pumping			All Other			Total
Net loss	$	(12,265	)	$	(1,333	)	$	(13,598	)	$	(34,815	)	$	(1,015	)	$	(35,830	)
Depreciation and amortization	9,274			1,516			10,790			27,905			4,764			32,669
Interest expense	—			4,550			4,550			—			15,942			15,942
Income tax benefit	—			(6,946		)	(6,946		)	—			(18,644		)	(18,644		)
(Gain)/loss on disposal of assets	5,942			(19		)	5,923			13,410			(551		)	12,859
Stock-based compensation	—			510			510			—			1,130			1,130
Gain on extinguishment of debt	—			—			—			—			(6,975		)	(6,975		)
Other expense	—			106			106			—			419			419
Adjusted EBITDA	$	2,951		$	(1,616	)	$	1,335		$	6,500		$	(4,930	)	$	1,570

____________________

(1) Other general and administrative expense relates to legal settlement expense.

A reconciliation from segment level financial information to the consolidated statement of operations is provided in the table below.

	Three months ended September 30, 2017							Nine months ended September 30, 2017
($ in thousands)	Pressure Pumping		All Other			Total		Pressure Pumping		All Other			Total
Service revenue	$	271,924	$	10,806		$	282,730	$	639,355	$	28,798		$	668,153
Adjusted EBITDA	$	50,013	$	(2,245	)	$	47,768	$	98,296	$	(3,641	)	$	94,655
Depreciation and amortization	$	13,637	$	1,108		$	14,745	$	35,228	$	3,374		$	38,602
Goodwill	$	9,425	$	—		$	9,425	$	9,425	$	—		$	9,425
Capital expenditures	$	61,752	$	765		$	62,517	$	203,097	$	3,231		$	206,328
Total assets	$	604,769	$	33,822		$	638,591	$	604,769	$	33,822		$	638,591
	Three months ended September 30, 2016							Nine months ended September 30, 2016
	Pressure Pumping		All Other			Total		Pressure Pumping		All Other			Total
Service revenue	$	109,697	$	7,207		$	116,904	$	251,410	$	21,589		$	272,999
Adjusted EBITDA	$	2,951	$	(1,616	)	$	1,335	$	6,500	$	(4,930	)	$	1,570
Depreciation and amortization	$	9,274	$	1,516		$	10,790	$	27,905	$	4,764		$	32,669
Goodwill	$	9,425	$	1,177		$	10,602	$	9,425	$	1,177		$	10,602
Capital expenditures	$	11,641	$	202		$	11,843	$	21,582	$	312		$	21,894
Total assets at December 31, 2016	$	501,906	$	39,516		$	541,422	$	501,906	$	39,516		$	541,422

A reconciliation from segment level financial information to the consolidated statement of operations is provided in the table below.

	Pressure Pumping		All Other			Total
Year ended December 31, 2016
Service revenue	$	409,014,337	$	27,905,933		$	436,920,270
Adjusted EBITDA	$	15,655,202	$	(7,839,014	)	$	7,816,188
Depreciation and amortization	$	37,281,862	$	6,259,817		$	43,541,679
Property and equipment impairment expense	$	—	$	6,305,426		$	6,305,426
Goodwill impairment expense	$	—	$	1,177,148		$	1,177,148
Capital expenditures	$	45,472,835	$	535,405		$	46,008,240
Goodwill	$	9,424,999	$	—		$	9,424,999
Total assets	$	501,905,907	$	39,516,391		$	541,422,298
Year ended December 31, 2015
Service revenue	$	510,198,128	$	59,419,630		$	569,617,758
Adjusted EBITDA	$	62,540,290	$	(2,391,032	)	$	60,149,258
Depreciation and amortization	$	38,368,650	$	11,765,343		$	50,133,993
Property and equipment impairment expense	$	7,979,906	$	28,629,426		$	36,609,332
Capital expenditures	$	69,029,321	$	2,647,324		$	71,676,645
Goodwill	$	9,424,999	$	1,177,148		$	10,602,147
Total assets	$	398,449,448	$	48,004,886		$	446,454,334

Reconciliation of net loss to adjusted EBITDA:

	Total
Year ended December 31, 2016
Net loss	$	(53,147,396	)
Depreciation and amortization	43,541,679
Interest expense	20,386,695
Loss on disposal of assets	22,528,670
Property and equipment impairment expense	6,305,426
Goodwill impairment expense	1,177,148
Gain on extinguishment of debt	(6,974,805		)
Stock‑based compensation	1,649,282
Other expense	321,071
Income tax benefit	(27,971,582		)
Adjusted EBITDA (see total above)	$	7,816,188

	Total
Year ended December 31, 2015
Net loss	$	(45,852,684	)
Depreciation and amortization	50,133,993
Interest expense	21,641,454
Loss on disposal of assets	21,267,985
Property and equipment impairment expense	36,609,332
Stock‑based compensation	1,238,824
Other expense	497,924
Income tax expense	(25,387,570		)
Adjusted EBITDA (see total above)	$	60,149,258

Major customers

For the years ended December 31, 2016 and 2015, the Company had revenue from four significant customers that accounted for the following percentages of the Company’s total revenue:

	2016		2015
Customer A	18.0	%	12.5	%
Customer B	12.5	%	8.8	%
Customer C	8.7	%	14.2	%
Customer D	7.0	%	11.1	%

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Net Income (Loss) Per Share (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Earnings Per Share [Abstract]

Calculations of net loss per share

The table below shows the calculations for the three and nine months ended September 30, 2017 and 2016.

	Three Months Ended September 30,					Nine Months Ended September 30,
(In thousands, except for per share data)	2017		2016			2017		2016
Numerator (both basic and diluted)
Net income (loss) relevant to common stockholders	$	21,965	$	(13,598	)	$	2,535	$	(35,830	)
Denominator
Denominator for basic income (loss) per share	83,040		52,975			74,124		42,526
Dilutive effect of stock options	2,808		—			2,822		—
Dilutive effect of performance stock units	37		—			—		—
Dilutive effect of non-vested restricted stock	379		—			172		—
Denominator for diluted income (loss) per share	86,264		52,975			77,118		42,526
Basic income (loss) per common share	$	0.26	$	(0.26	)	$	0.03	$	(0.84	)
Diluted income (loss) per common share	$	0.25	$	(0.26	)	$	0.03	$	(0.84	)

The table below shows the calculations for years ended December 31, 2016 and 2015.

	2016			2015
Numerator (both basic and diluted)
Net loss relevant to common stockholders	$	(53,147,396	)	$	(45,852,684	)
Denominator
Denominator for basic earnings (loss) per share	44,786,687			34,992,662
Denominator for diluted earnings (loss) per share	44,786,687			34,992,662
Basic loss per common share	$	(1.19	)	$	(1.31	)
Diluted loss per common share	$	(1.19	)	$	(1.31	)

Anti-dilutive shares excluded from diluted earnings (loss) per share calculation

As shown in the table below, the following non-vested restricted stock, performance stock units, and stock options have not been included in the calculation of diluted income (loss) per share as they would be anti-dilutive to the calculation above.

	Three Months Ended September 30,		Nine Months Ended September 30,
(In thousands)	2017	2016	2017	2016
Stock options	789	4,646	789	4,646
Performance stock units	—	—	170	—
Non-vested restricted stock	—	372	318	372
	789	5,018	1,277	5,018

The Company also has non‑vested restricted stock and stock options as shown in the table below, but have not been included in the above calculation of diluted earnings (loss) per share as it would be anti‑dilutive to the calculation above. Additionally, we excluded the preferred stock in the net loss per share calculation because the holders do not have a participating right in the undistributed earnings (loss) of the Company.

	2016	2015
Stock options	4,645,884	3,485,791
Preferred stock	16,999,990	—
Non‑vested restricted stock	372,335	372,335
	22,018,209	3,858,126

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Stock-Based Compensation (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock options, valuation assumptions

The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.83		%

The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.35		%

The fair value of each stock option award granted is estimated on the date of grant using the Black- Scholes option-pricing model. The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	18		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	2.23		%

The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	55		%
Expected dividends	$	—
Expected term (in years)	5.8
Risk free rate	1.22		%

The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.83		%

The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	55		%
Expected dividends	$	—
Expected term (in years)	5.8
Risk free rate	1.22		%

The fair value of the options was estimated at the date of grant using the following assumptions:

Expected volatility	45		%
Expected dividends	$	—
Expected term (in years)	6.25
Risk free rate	1.35

Schedule of stock options, activity

A summary of the stock option activity for the nine months ended September 30, 2017 and the year ended December 31, 2016, is presented below.

	Number of Shares		Weighted Average Exercise Price		Weighted Average Grant-Date Fair Value
Outstanding at January 1, 2016	3,485,791		$	3.96	$	1.77
Granted	1,274,549		$	2.25	$	1.77
Exercised	—		$	—	$	—
Forfeited	(114,456	)	$	3.96	$	1.77
Expired	—		$	—	$	—
Canceled	—		$	—	$	—
Outstanding at December 31, 2016	4,645,884		$	3.49	$	1.77
Exercisable at December 31, 2016	2,354,466		$	3.77	$	1.77
Outstanding at January 1, 2017	4,645,884		$	3.49	$	1.77
Granted	793,738		$	14.00	$	3.35
Exercised	(226,194	)	$	3.96	$	1.77
Forfeited	(5,148	)	$	14.00	$	3.35
Expired	—		$	—	$	—
Canceled	(571,927	)	$	3.96	$	1.77
Outstanding at September 30, 2017	4,636,353		$	5.20	$	2.04
Exercisable at September 30, 2017	3,847,763		$	3.39	$	1.77

A summary of the stock option activity for the years ended December 31, 2016 and 2015 is presented below.

	Number of Shares		Weighted Average Exercise Price		Weighted Average Grant‑Date Fair Value
Outstanding at January 1, 2015	3,485,791		$	3.96	$	1.77
Granted	—		$	—	$	—
Exercised	—		$	—	$	—
Forfeited	—		$	—	$	—
Expired	—		$	—	$	—
Outstanding at December 31, 2015	3,485,791		$	3.96	$	1.77
Exercisable at December 31, 2015	1,399,704		$	3.96	$	1.77
Outstanding at January 1, 2016	3,485,791		$	3.96	$	1.77
Granted	1,274,549		$	2.25	$	1.77
Exercised	—		$	—	$	—
Forfeited	(114,456	)	$	3.96	$	1.77
Expired	—		$	—	$	—
Outstanding at December 31, 2016	4,645,884		$	3.49	$	1.77
Exercisable at December 31, 2016	2,354,466		$	3.77	$	1.77

Schedule of RSUs, activity

The following table summarizes RSUs activity during the nine months ended September 30, 2017:

	Number of Shares		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2017	372,335		$	3.89
Granted	691,585		$	13.65
Vested	—		$	—
Exercised	—		$	—
Forfeited	(1,170	)	$	13.65
Expired	—		$	—
Canceled	(372,335	)	$	3.89
Outstanding at September 30, 2017	690,415		$	13.65

Schedule of performance shares, activity

The following table summarizes information about the performance stock units that were outstanding at September 30, 2017:

Period Granted	Target Shares Outstanding at Beginning of Period	Target Shares Granted	Target Shares Vested	Target Shares Forfeited	Target Shares Outstanding at End of Period	Weighted Average Grant Date Fair Value per Share
2017	—	169,635	—	—	169,635	$	10.73
Total	—	169,635	—	—	169,635

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of components of income tax expense (benefit)

The components of the provision for income taxes for the year ended December 31, 2016 and 2015 are as follows:

	2016			2015
Federal:
Current	$	—		$	(1,092,437	)
Deferred	(29,082,057		)	(22,176,578		)
	(29,082,057		)	(23,269,015		)
State:
Current	—			(350,494		)
Deferred	1,110,475			(1,768,061		)
	1,110,475			(2,118,555		)
Total benefit	$	(27,971,582	)	$	(25,387,570	)

Schedule of effective income tax rate reconciliation

Reconciliation between the amounts determined by applying the federal statutory rate of 35% to income tax benefit is as follows:

	2016			2015
Tax at federal statutory rate	$	(28,391,642	)	$	(24,934,089	)
State taxes, net of federal benefit	(215,952		)	(885,226		)
Permanent differences	498,131			578,837
Valuation allowance	878,522			—
Other	(740,641		)	(147,092		)
Total provision	$	(27,971,582	)	$	(25,387,570	)

Schedule of deferred tax assets and liabilities

The significant items giving rise to deferred tax assets (liabilities) at December 31, 2016 and 2015, respectively are as follows:

	2016			2015
Deferred Income Tax Assets
Accrued liabilities	334,072			471,223
Allowance for doubtful accounts	194,664			300,640
Goodwill and other intangible assets	10,953,458			13,021,523
Stock‑based compensation	1,692,288			1,119,355
Net operating losses	49,266,688			29,067,458
Other	388,813			388,813
Noncurrent deferred tax assets	$	62,829,983		$	44,369,012
Total deferred tax assets	$	62,829,983		$	44,369,012
Valuation allowance	(878,522		)	—
Total deferred tax assets — net	$	61,951,461		$	44,369,012
Deferred Income Tax Liabilities
Property and equipment	$	(60,958,408	)	$	(70,621,451	)
Prepaid expenses	(1,506,831		)	(1,498,531		)
Other	(634,692		)	(1,369,082		)
Noncurrent deferred tax liabilities	$	(63,099,931	)	$	(73,489,064	)
Net deferred tax liability	$	(1,148,470	)	$	(29,120,052	)

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum rental payments for operating leases

Required remaining lease payments for each fiscal year are as follows:

($ in thousands)
2017	$	116
2018	426
2019	366
2020	344
2021 and thereafter	774
Total	$	2,026

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Basis of Presentation - Additional Information (Details)			9 Months Ended		12 Months Ended
	Mar. 22, 2017 USD ($) $ / shares shares	Dec. 22, 2016	Sep. 30, 2017 USD ($) $ / shares	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2015 USD ($) $ / shares	Sep. 30, 2013 $ / shares
Subsidiary, Sale of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares			$ 0.001		$ 0.001	$ 0.001	$ 0.001
Proceeds from issuance of common stock			$ 185,500,000	$ 0
Repayment of outstanding borrowings	$ 71,800,000		$ 164,638,000	$ 42,166,000	$ 41,295,302	$ 73,781,755
Stock split ratio	1.45	0.0059
IPO
Subsidiary, Sale of Stock [Line Items]
Shares of common stock sold, including shares sold by third parties (in shares) | shares	25,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001
Stock price (in dollars per share) | $ / shares	$ 14.00
Proceeds from issuance of common stock	$ 170,100,000
Payment of underwriting discounts and commissions	10,900,000
Payments of stock issuance costs, other	$ 4,500,000
IPO Sold By Company
Subsidiary, Sale of Stock [Line Items]
Shares of common stock sold, including shares sold by third parties (in shares) | shares	13,250,000
IPO - Shares From Existing Shareholders
Subsidiary, Sale of Stock [Line Items]
Shares of common stock sold, including shares sold by third parties (in shares) | shares	11,750,000

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Organization and History - Additional Information (Details)				3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 22, 2017 USD ($) $ / shares shares	Dec. 22, 2016 shares	Jun. 08, 2016 shares	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Sep. 30, 2013 $ / shares
Class of Stock [Line Items]
Stock split ratio	1.45	0.0059
Stock, shares authorized (in shares)		230,000,000
Common stock, authorized (in shares)		200,000,000		200,000,000		200,000,000		200,000,000	200,000,000
Preferred stock, authorized (in shares)		30,000,000		30,000,000		30,000,000		30,000,000	30,000,000
Common stock, par value (in dollars per share) | $ / shares				$ 0.001		$ 0.001		$ 0.001	$ 0.001	$ 0.001
Issuance of common stock (in shares)			17,817,925
Proceeds from IPO | $						$ 185,500,000	$ 0
Repayment of outstanding borrowings | $	$ 71,800,000					164,638,000	42,166,000	$ 41,295,302	$ 73,781,755
Depreciation and amortization | $				$ 14,745,000	$ 10,790,000	$ 38,602,000	$ 32,669,000	$ 43,541,679	$ 50,133,993
IPO
Class of Stock [Line Items]
Shares of common stock sold, including shares sold by third parties (in shares)	25,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001
Stock price (in dollars per share) | $ / shares	$ 14.00
Issuance of common stock (in shares)	13,250,000
Shares sold by third party (in shares)	11,750,000
Proceeds from IPO | $	$ 170,100,000
Payment of underwriting discounts and commissions | $	10,900,000
Payments of stock issuance costs, other | $	$ 4,500,000
Performance stock units | IPO
Class of Stock [Line Items]
Number of shares of outstanding stock converted (in shares)	16,999,990
March 2017 Stock Split | IPO
Class of Stock [Line Items]
Stock split ratio	1.45
Series A Preferred Stock Converted To Common Stock | IPO
Class of Stock [Line Items]
Shares of common stock issued for each share of preferred stock converted	1
Series A Preferred Stock Converted To Common Stock | Performance stock units | IPO
Class of Stock [Line Items]
Stock split ratio	1

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Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2011
Accounting Policies [Abstract]
Allowance for doubtful accounts		$ 600,000				$ 600,000	$ 800,000
Loss/(Gain) on disposal of assets	$ 8,742,000		$ 5,923,000	$ 28,971,000	$ 12,859,000	22,528,670	21,267,985
Property, Plant and Equipment [Line Items]
Allowance for doubtful accounts	335,000	551,909		335,000		551,909	845,681
Goodwill	9,425,000	9,424,999	10,602,000	9,425,000	10,602,000	9,424,999	10,602,147
Goodwill impairment expense						1,177,148	0
Property and equipment impairment expense				0	0	6,305,426	36,609,332
Advertising expense						400,000	900,000
Amortization of deferred debt issuance costs				3,322,000	1,806,000	$ 2,090,874	1,351,202
Vehicles | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives						P1Y
Vehicles | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives						P5Y
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives						P2Y
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives						P20Y
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives						P5Y
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives						P20Y
Permain drilling unit
Property, Plant and Equipment [Line Items]
Property and equipment impairment expense		6,300,000				$ 6,300,000	28,600,000
All Other
Accounting Policies [Abstract]
Loss/(Gain) on disposal of assets	1,190,000		(19,000)	1,028,000	(551,000)
Property, Plant and Equipment [Line Items]
Goodwill	0	0	1,177,000	0	1,177,000	0	1,177,148
Goodwill impairment expense						1,177,148
Property and equipment impairment expense						6,305,426	28,629,426
Pressure Pumping
Accounting Policies [Abstract]
Loss/(Gain) on disposal of assets	7,552,000		5,942,000	27,943,000	13,410,000
Property, Plant and Equipment [Line Items]
Goodwill	$ 9,425,000	9,424,999	$ 9,425,000	$ 9,425,000	$ 9,425,000	9,424,999	9,424,999
Goodwill impairment expense						0
Property and equipment impairment expense						0	7,979,906
Blackrock Drilling, Inc
Property, Plant and Equipment [Line Items]
Consideration transferred								$ 1,800,000
Property, plant, and equipment								600,000
Goodwill								$ 1,200,000
Goodwill impairment expense						1,200,000	0
Blackrock Drilling, Inc | All Other
Property, Plant and Equipment [Line Items]
Goodwill impairment expense						1,200,000
Stimulation Services, LLC
Property, Plant and Equipment [Line Items]
Consideration transferred									$ 24,400,000
Property, plant, and equipment									15,000,000
Goodwill									$ 9,400,000
Goodwill impairment expense						0	$ 0
Stimulation Services, LLC | Pressure Pumping
Property, Plant and Equipment [Line Items]
Goodwill		$ 9,400,000				$ 9,400,000

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Supplemental Cash Flow Disclosures - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Supplemental cash flows disclosures
Interest paid	$ 18,248,687	$ 20,531,410
Income taxes paid	2,897	1,295,173
Supplemental disclosure of non‑cash activities
Capital expenditures included in accounts payable	$ 3,176,356	$ 8,821,227

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Fair Value Measurements - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment impairment expense		$ 0	$ 0	$ 6,305,426	$ 36,609,332
PP&E, net	$ 263,861,645	399,268,000		263,861,645	291,838,498
Goodwill	9,424,999	9,425,000	10,602,000	9,424,999	10,602,147
Additions or disposals of Goodwill		0	0
Goodwill impairment expense				1,177,148	0
Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment impairment expense		0		6,305,426	36,609,332
Goodwill impairment expense		0		1,177,148
Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) interest rate swap		200,000	$ 100,000	200,000	(300,000)
Interest rate swap | Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of interest rate swap liability	300,000	30,000		300,000	500,000
Balance | Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	9,424,999	$ 0		9,424,999
Permain drilling unit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment impairment expense	6,300,000			6,300,000	28,600,000
PP&E, net	15,000,000			15,000,000	48,100,000	$ 15,000,000
Acidizing unit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment impairment expense					8,000,000
PP&E, net					15,600,000
Surface drilling reporting unit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	1,200,000			1,200,000
Surface drilling reporting unit | Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Reporting unit, fair value	3,800,000			3,800,000
Goodwill impairment expense	1,200,000			1,200,000	$ 0
Surface drilling reporting unit | Balance | Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Reporting unit, amount of fair value in excess of carrying amount	4,200,000			4,200,000
Surface drilling reporting unit | Estimated fair value measurements | Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	$ 0			$ 0

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Fair Value Measurements - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses)	$ 0	$ 0	$ (6,305,426)	$ (36,609,332)
Total gains (losses)			(1,177,148)	0
Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses)	0		(6,305,426)	(36,609,332)
Total gains (losses)	0		(1,177,148)
Nonrecurring basis | Quoted prices in active market (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment, net			0	0
Goodwill			0
Nonrecurring basis | Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment, net				291,838,498
Goodwill			0
Nonrecurring basis | Significant other unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment, net			0	0
Goodwill			9,424,999
Balance | Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment, net	0		8,700,000	$ 291,838,498
Goodwill	0		9,424,999
Estimated fair value measurements | Nonrecurring basis | Quoted prices in active market (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment, net	0		0
Goodwill	0		0
Estimated fair value measurements | Nonrecurring basis | Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment, net	0		8,700,000
Goodwill	0		0
Estimated fair value measurements | Nonrecurring basis | Significant other unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment, net	0		0
Goodwill	$ 0		$ 9,425,000

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Intangible Assets - Intangible Assets Subject to Amortization (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Internally developed software	$ 1,439,941	$ 1,439,941
Less accumulated amortization	850,902	562,914
Intangible assets — net	$ 589,039	$ 877,027

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Intangible Assets - Estimated Remaining Amortization Expense (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
2017	$ 287,988
2018	287,988
2019	13,063
Intangible assets — net	$ 589,039	$ 877,027

XML

Intangible Assets - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Useful life	5 years
Amortization expense	$ 0.3
Remaining amortization period	2 years 1 month 6 days

XML

Property and Equipment (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Subtotal		$ 407,140,864	$ 404,088,078
Less accumulated depreciation		143,279,219	112,249,580
Property and equipment — net	$ 399,268,000	263,861,645	291,838,498
Equipment and vehicles
Property, Plant and Equipment [Line Items]
Subtotal		402,640,458	399,084,240
Leasehold improvements
Property, Plant and Equipment [Line Items]
Subtotal		$ 4,500,406	$ 5,003,838

XML

Impairment of Long-lived Assets - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 30, 2016
Segment Reporting Information [Line Items]
Property and equipment impairment expense		$ 0	$ 0	$ 6,305,426	$ 36,609,332
PP&E, net	$ 263,861,645	$ 399,268,000		263,861,645	291,838,498
Permain drilling unit
Segment Reporting Information [Line Items]
Property and equipment impairment expense				6,300,000	28,600,000
Reporting unit, fair value					18,800,000
Acidizing unit
Segment Reporting Information [Line Items]
Property and equipment impairment expense					8,000,000
Reporting unit, fair value					6,300,000
Permain drilling unit
Segment Reporting Information [Line Items]
Property and equipment impairment expense	6,300,000			6,300,000	28,600,000
PP&E, net	15,000,000			15,000,000	$ 48,100,000	$ 15,000,000
Estimated fair value measurements | Significant other observable inputs (Level 2) | Permain drilling unit
Segment Reporting Information [Line Items]
Property and equipment, net	$ 8,700,000			$ 8,700,000

XML

Deferred Revenue Rebate - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 30, 2011	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Fracturing services, period	78 months
Capital expenditures	$ 13,000,000	$ 62,517,000	$ 11,843,000	$ 206,328,000	$ 21,894,000	$ 46,008,240	$ 71,676,645
Deferred revenue	$ 12,000,000
Amortization of deferred revenue rebate				$ 1,385,000	$ 1,385,000	$ 1,846,251	$ 1,846,251
Equipment financing | Note payable
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	12.00%
Debt instrument, face amount	$ 25,000,000

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Long-Term Debt - Additional Information (Details)									3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($)	Mar. 22, 2017 USD ($)	Jan. 13, 2017 USD ($)	Jun. 16, 2016 USD ($)	Jun. 08, 2016 USD ($)	Nov. 24, 2015 USD ($) fleet	Nov. 24, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jun. 08, 2015 USD ($)	Dec. 31, 2014 installment	Mar. 31, 2014
Debt Instrument [Line Items]
Debt instrument, term						36 months	36 months
Number of hydraulic fracturing fleets | fleet						3
Proceeds from debt						$ 25,000,000	$ 25,000,000
Proceeds from contributed capital					$ 40,425,000								$ 40,425,196	$ 0
Debt instrument, covenant, additional capital, reserved for working capital					10,000,000										$ 10,000,000
Debt instrument, covenant, additional capital, available for repurchase of debt					$ 30,000,000										$ 30,000,000
Debt instrument, covenant, financial statements, past due, period					30 days
Debt instrument, repurchase price to par				$ 0.80
Debt instrument, repurchase price, discount to par, percentage				20.00%
Extinguishment of debt				$ 37,500,000
Early repayment of senior debt				30,000,000									30,000,000	0
Payments of debt extinguishment costs				525,000							$ 0	$ 525,000	525,196	0
Gain on extinguishment of debt				$ 6,975,000					$ 0	$ 0	0	6,975,000	6,974,805	0
Repayments of borrowings		$ 71,800,000									$ 164,638,000	$ 42,166,000	$ 41,295,302	$ 73,781,755
Proceeds from lines of credit	$ 2,100,000
Maximum
Debt Instrument [Line Items]
Debt instrument, covenant, leverage ratio, maximum								3.5									3.5
Term Loan | Equipment financing
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage																9.50%
Debt, payments, number of installments | installment																13
Fair value percentage of carrying value													89.00%	60.00%
6.25% Term loan due September 2019 | 6.25% Term loan due September 2019
Debt Instrument [Line Items]
Debt instrument, face amount								$ 220,000,000
Debt instrument, interest rate, stated percentage	6.25%								6.25%		6.25%		6.25%
Repayment of prior debt outstanding, percentage								100.00%
Repayments of debt			$ 75,000,000
Revolving Credit Facility | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity								$ 40,000,000
Debt instrument, interest rate, stated percentage								6.25%
Debt instrument, variable floor rate								1.00%
Repayments of borrowings			$ 13,500,000
ABL Facility | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 150,000,000
Line of credit facility, expiration period		5 years
Line of credit facility, borrowing base, accounts receivable percentage		85.00%
Line of credit, springing fixed charge coverage ratio		1.0
Line of credit facility, coverage ratio establishing threshold, option one, percentage of facility size and borrowing base		10.00%
Line of credit facility, coverage ratio establishing threshold, option two, amount		$ 12,000,000
Line of credit facility, commitment fee, utilization percentage, threshold		50.00%
ABL Facility | Revolving Credit Facility | Line of Credit | Minimum
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage		0.25%
ABL Facility | Revolving Credit Facility | Line of Credit | Maximum
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage		0.375%
ABL Facility | Revolving Credit Facility | Line of Credit | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.75%
ABL Facility | Revolving Credit Facility | Line of Credit | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		2.25%
ABL Facility | Revolving Credit Facility | Line of Credit | Base Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.75%
ABL Facility | Revolving Credit Facility | Line of Credit | Base Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.25%
Investor
Debt Instrument [Line Items]
Proceeds from contributed capital					$ 425,000
Energy Capital Partners | Majority Shareholder
Debt Instrument [Line Items]
Proceeds from contributed capital					$ 40,000,000
Estimated fair value measurements | Term Loan | Equipment financing
Debt Instrument [Line Items]
Debt instrument, fair value disclosure													$ 130,600,000	$ 117,200,000
Balance | Term Loan | Equipment financing
Debt Instrument [Line Items]
Debt instrument, fair value disclosure													$ 146,800,000	$ 195,300,000

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Long-Term Debt - Schedule of Debt (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2013
Debt Instrument [Line Items]
Total debt	$ 41,917,000	$ 179,442,838	$ 258,238,140
Less deferred loan costs, net of amortization	0	3,115,679	5,067,009
Subtotal	41,917,000	176,327,159	253,171,131
Less current portion of long-term debt	7,441,000	16,920,074	16,295,302
Total long-term debt, net of deferred loan costs	34,476,000	159,407,085	236,875,829
6.25% Term loan due September 2019 | 6.25% Term loan due September 2019
Debt Instrument [Line Items]
Total debt	$ 0	$ 146,750,000	195,250,000
Debt instrument, interest rate, stated percentage	6.25%	6.25%
Equipment financing | Equipment financing
Debt Instrument [Line Items]
Total debt	$ 16,917,000	$ 19,192,838	24,488,140
Revolving Credit Facility | Line of Credit | ABL Facility
Debt Instrument [Line Items]
Total debt	25,000,000	0
Revolving Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Total debt	$ 0	$ 13,500,000	$ 38,500,000
Debt instrument, interest rate, stated percentage				6.25%

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Long-Term Debt - Maturities of Long-term Debt (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
2017	$ 1,778,000	$ 16,920,074
2018	14,298,000	37,772,764
2019	805,000	124,750,000
2020	36,000
2021 and therafter	25,000,000
Total	$ 41,917,000	$ 179,442,838	$ 258,238,140

XML

Accrued Liabilities - Additional Information (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Accrued insurance		$ 2,900,221	$ 2,778,368
Accrued payroll and related expenses		4,728,614	1,256,269
Other		5,990,636	3,017,278
Total	$ 11,074,000	$ 13,619,471	$ 7,051,915

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Employee Benefit Plan - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Employee minimum service period	6 months
Employee maximum annual contribution	$ 15,000
Annual vesting percentage of company contributions	25.00%
Vesting term	5 years
Employer match	$ 0.20
Employer match percentage	10.00%
Plan expense	$ 200,000	$ 200,000

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Reportable Segment Information - Additional Information (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2017 segment	Dec. 31, 2016 customer	Dec. 31, 2015 customer
Revenue, Major Customer [Line Items]
Number of operating segments	7
Number of reportable segments	1
Number of customers | customer		4	4
Customer concentration risk | Customer A | Pressure pumping
Revenue, Major Customer [Line Items]
Concentration risk percentage		96.00%	99.00%
Customer concentration risk | Customer B | Pressure pumping
Revenue, Major Customer [Line Items]
Concentration risk percentage		99.00%	100.00%
Customer concentration risk | Customer C | Pressure pumping
Revenue, Major Customer [Line Items]
Concentration risk percentage		100.00%	88.00%
Customer concentration risk | Customer D | Pressure pumping
Revenue, Major Customer [Line Items]
Concentration risk percentage		99.00%	99.00%

XML

Reportable Segment Information - Reconciliation of Segment Information (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 30, 2011	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Service revenue		$ 282,730,000	$ 116,904,000	$ 668,153,000	$ 272,999,000	$ 436,920,270	$ 569,617,758
Earnings Before Income Taxes, Depreciation and Amortization, Adjusted For One-Time And Nonrecurring Charges		47,768,000	1,335,000	94,655,000	1,570,000
Adjusted EBITDA						7,816,188	60,149,258
Depreciation and amortization		14,745,000	10,790,000	38,602,000	32,669,000	43,541,679	50,133,993
Property and equipment impairment expense				0	0	6,305,426	36,609,332
Goodwill impairment expense						1,177,148	0
Goodwill		9,425,000	10,602,000	9,425,000	10,602,000	9,424,999	10,602,147
Capital expenditures	$ 13,000,000	62,517,000	11,843,000	206,328,000	21,894,000	46,008,240	71,676,645
Total assets		638,591,000		638,591,000		541,422,298	446,454,334
Pressure Pumping
Segment Reporting Information [Line Items]
Service revenue		271,924,000	109,697,000	639,355,000	251,410,000	409,014,337	510,198,128
Earnings Before Income Taxes, Depreciation and Amortization, Adjusted For One-Time And Nonrecurring Charges		50,013,000	2,951,000	98,296,000	6,500,000
Adjusted EBITDA						15,655,202	62,540,290
Depreciation and amortization		13,637,000	9,274,000	35,228,000	27,905,000	37,281,862	38,368,650
Property and equipment impairment expense						0	7,979,906
Goodwill impairment expense						0
Goodwill		9,425,000	9,425,000	9,425,000	9,425,000	9,424,999	9,424,999
Capital expenditures		61,752,000	11,641,000	203,097,000	21,582,000	45,472,835	69,029,321
Total assets		604,769,000		604,769,000		501,905,907	398,449,448
All Other
Segment Reporting Information [Line Items]
Service revenue		10,806,000	7,207,000	28,798,000	21,589,000	27,905,933	59,419,630
Earnings Before Income Taxes, Depreciation and Amortization, Adjusted For One-Time And Nonrecurring Charges		(2,245,000)	(1,616,000)	(3,641,000)	(4,930,000)
Adjusted EBITDA						(7,839,014)	(2,391,032)
Depreciation and amortization		1,108,000	1,516,000	3,374,000	4,764,000	6,259,817	11,765,343
Property and equipment impairment expense						6,305,426	28,629,426
Goodwill impairment expense						1,177,148
Goodwill		0	1,177,000	0	1,177,000	0	1,177,148
Capital expenditures		765,000	$ 202,000	3,231,000	$ 312,000	535,405	2,647,324
Total assets		$ 33,822,000		$ 33,822,000		$ 39,516,391	$ 48,004,886

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Reportable Segment Information - Reconciliation of Segment Information EBITA (Details) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 16, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net income (loss)		$ 21,965,000	$ (13,598,000)	$ 2,535,000	$ (35,830,000)	$ (53,147,396)	$ (45,852,684)
Depreciation and amortization		14,745,000	10,790,000	38,602,000	32,669,000	43,541,679	50,133,993
Interest expense		644,000	4,550,000	6,469,000	15,942,000	20,386,695	21,641,454
Income tax expense (benefit)		(96,000)	(6,946,000)	128,000	(18,644,000)	(27,971,582)	(25,387,570)
Loss/(gain) on disposal of assets		8,742,000	5,923,000	28,971,000	12,859,000	22,528,670	21,267,985
Property and equipment impairment expense				0	0	6,305,426	36,609,332
Stock-based compensation		751,000	510,000	8,730,000	1,130,000	1,649,282	1,238,824
Gain on extinguishment of debt	$ (6,975,000)	0	0	0	(6,975,000)	(6,974,805)	0
Other expense		191,000	106,000	792,000	419,000	321,071	497,924
Other general and administrative expense		149,000		722,000
Deferred IPO bonus expense		677,000		7,706,000
Earnings Before Income Taxes, Depreciation and Amortization, Adjusted For One-Time And Nonrecurring Charges		47,768,000	1,335,000	94,655,000	1,570,000
Adjusted EBITDA						7,816,188	60,149,258
Pressure Pumping
Segment Reporting Information [Line Items]
Net income (loss)		28,372,000	(12,265,000)	30,087,000	(34,815,000)
Depreciation and amortization		13,637,000	9,274,000	35,228,000	27,905,000	37,281,862	38,368,650
Interest expense		0	0	0	0
Income tax expense (benefit)		0	0	0	0
Loss/(gain) on disposal of assets		7,552,000	5,942,000	27,943,000	13,410,000
Property and equipment impairment expense						0	7,979,906
Stock-based compensation		0	0	0	0
Gain on extinguishment of debt			0		0
Other expense		0	0	0	0
Other general and administrative expense		0		0
Deferred IPO bonus expense		452,000		5,038,000
Earnings Before Income Taxes, Depreciation and Amortization, Adjusted For One-Time And Nonrecurring Charges		50,013,000	2,951,000	98,296,000	6,500,000
Adjusted EBITDA						15,655,202	62,540,290
All Other
Segment Reporting Information [Line Items]
Net income (loss)		(6,407,000)	(1,333,000)	(27,552,000)	(1,015,000)
Depreciation and amortization		1,108,000	1,516,000	3,374,000	4,764,000	6,259,817	11,765,343
Interest expense		644,000	4,550,000	6,469,000	15,942,000
Income tax expense (benefit)		(96,000)	(6,946,000)	128,000	(18,644,000)
Loss/(gain) on disposal of assets		1,190,000	(19,000)	1,028,000	(551,000)
Property and equipment impairment expense						6,305,426	28,629,426
Stock-based compensation		751,000	510,000	8,730,000	1,130,000
Gain on extinguishment of debt			0		(6,975,000)
Other expense		191,000	106,000	792,000	419,000
Other general and administrative expense		149,000		722,000
Deferred IPO bonus expense		225,000		2,668,000
Earnings Before Income Taxes, Depreciation and Amortization, Adjusted For One-Time And Nonrecurring Charges		$ (2,245,000)	$ (1,616,000)	$ (3,641,000)	$ (4,930,000)
Adjusted EBITDA						$ (7,839,014)	$ (2,391,032)

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Reportable Segment Information - Major Customers (Details) - Customer concentration risk	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Total revenue | Customer A
Revenue, Major Customer [Line Items]
Concentration risk percentage	18.00%	12.50%
Total revenue | Customer B
Revenue, Major Customer [Line Items]
Concentration risk percentage	12.50%	8.80%
Total revenue | Customer C
Revenue, Major Customer [Line Items]
Concentration risk percentage	8.70%	14.20%
Total revenue | Customer D
Revenue, Major Customer [Line Items]
Concentration risk percentage	7.00%	11.10%
Pressure pumping | Customer A
Revenue, Major Customer [Line Items]
Concentration risk percentage	96.00%	99.00%
Pressure pumping | Customer B
Revenue, Major Customer [Line Items]
Concentration risk percentage	99.00%	100.00%
Pressure pumping | Customer C
Revenue, Major Customer [Line Items]
Concentration risk percentage	100.00%	88.00%
Pressure pumping | Customer D
Revenue, Major Customer [Line Items]
Concentration risk percentage	99.00%	99.00%

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Net Income (Loss) Per Share - Calculation of Net Loss Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Numerator (both basic and diluted)
Net income (loss) relevant to common stockholders	$ 21,965,000	$ (13,598,000)	$ 2,535,000	$ (35,830,000)	$ (53,147,396)	$ (45,852,684)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Denominator for basic earnings (loss) per share (in shares)	83,040,000	52,975,000	74,124,000	42,526,000	44,786,687	34,992,662
Denominator for diluted income (loss) per share (in shares)	86,264,000	52,975,000	77,118,000	42,526,000	44,786,687	34,992,662
Basic income (loss) per common share (in dollars per share)	$ 0.26	$ (0.26)	$ 0.03	$ (0.84)	$ (1.19)	$ (1.31)
Diluted income (loss) per common share (in dollars per share)	$ 0.25	$ (0.26)	$ 0.03	$ (0.84)	$ (1.19)	$ (1.31)
Stock options
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Dilutive effect of share based payment (in shares)	2,808,000	0	2,822,000	0
Performance stock units
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Dilutive effect of share based payment (in shares)	37,000	0	0	0
Restricted Stock Units (RSUs)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Dilutive effect of share based payment (in shares)	379,000	0	172,000	0

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Net Income (Loss) Per Share - Anti-dilutive Shares Excluded from Diluted Earnings (Loss) Per Share Calculation (Details) - shares	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	789,000	5,018,000	1,277,000	5,018,000	22,018,209	3,858,126
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	789,000	4,646,000	789,000	4,646,000	4,645,884	3,485,791
Performance stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	0	0	170,000	0	16,999,990	0
Non-vested restricted stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	0	372,000	318,000	372,000	372,335	372,335

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Stock-Based Compensation - Additional Information (Details)										1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended			22 Months Ended
	Sep. 30, 2017 USD ($) $ / shares shares	Jun. 05, 2017 shares	Mar. 22, 2017 shares	Mar. 16, 2017 USD ($) shares	Jul. 19, 2016 installment shares	Dec. 31, 2014 shares	Dec. 01, 2013 installment shares	Sep. 30, 2013 $ / shares shares	Jun. 14, 2013 shares	Dec. 31, 2016 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 shares	Dec. 31, 2014 $ / shares shares	Mar. 31, 2017 shares	Mar. 04, 2014 shares	Mar. 04, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)													793,738		1,274,549	0
Outstanding value of options (in dollars per share) | $ / shares													$ 14.00		$ 2.25	$ 0.00
Forfeited (in shares)													5,148		114,456	0	13,437
Deferred IPO bonus expense | $											$ 677,000		$ 7,706,000
Outstanding balance (in shares)	4,636,353					3,485,791				4,645,884	4,636,353		4,636,353		4,645,884	3,485,791	3,485,791	3,485,791
Canceled (in shares)													(571,927)		0
Common stock, par value (in dollars per share) | $ / shares	$ 0.001							$ 0.001		$ 0.001	$ 0.001		$ 0.001		$ 0.001	$ 0.001
Stock-based compensation | $											$ 751,000	$ 510,000	$ 8,730,000	$ 1,130,000	$ 1,649,282	$ 1,238,824
Granted (in dollars per share) | $ / shares													$ 3.35		$ 1.77	$ 0.00
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			372,335					372,335					691,585
Canceled (in shares)			(372,335)
Restricted stock units, conversion of stock, conversion rights (in shares)								1
Granted (in dollars per share) | $ / shares								$ 3.89					$ 13.65
Vested (in shares)													0
Granted (in dollars per share) | $ / shares								$ 3.89
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)													169,635
Vested (in shares)													0
Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)																				4,645,884	4,645,884
Deferred IPO bonus expense | $				$ 5,100,000
Stock Option Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)																		3,499,228
Outstanding value of options (in dollars per share) | $ / shares																		$ 3.96
Expiration period						10 years
Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)																			5,800,000
Stock-based compensation | $															$ 1,600,000	$ 1,200,000
Compensation cost not yet recognized, period for recognition	2 years 10 months 24 days														1 year 7 months 6 days
Tax benefit from compensation expense | $													$ 8,700,000	1,100,000	$ 600,000	400,000
Compensation not yet recognized, stock options | $	$ 7,500,000									$ 2,400,000	$ 7,500,000		7,500,000		2,400,000
Incentive Award Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)		319,250
Granted (in shares)		319,250
Stock-based compensation | $													5,800,000	0
Restricted stock units, conversion of stock, conversion rights (in shares)		1
Incentive Award Plan | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation | $													200,000	0
June 14, 2013 | Stock Option Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)									2,799,408
Expiration period									10 years
Award vesting rights									25.00%
Stock-based compensation | $													700,000	900,000	$ 1,200,000	$ 1,200,000
December 1, 2013 | Stock Option Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)							699,820
Number of installments | installment							4
Expiration period							10 years
Award vesting rights							25.00%
Forfeited (in shares)															114,456
July 19, 2016 | Stock Option Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)					1,274,549
Number of installments | installment					5
Expiration period					10 years
Award vesting rights										20.00%
Stock-based compensation | $													1,800,000	200,000	$ 400,000
March 16, 2017 | Stock Option Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)				793,738
Expiration period				10 years
Stock-based compensation | $													$ 400,000	$ 0

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Stock-Based Compensation - Fair Value Of Options (Details) - Stock Option Plan - Stock options - USD ($) $ in Thousands	Mar. 16, 2017	Jul. 19, 2016	Dec. 01, 2013	Jun. 14, 2013
June 14, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility				45.00%
Expected dividends				$ 0
Expected term (in years)				6 years 3 months
Risk free rate				1.35%
December 1, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility			45.00%
Expected dividends			$ 0
Expected term (in years)			6 years 3 months
Risk free rate			1.83%
July 19, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility		55.00%
Expected dividends		$ 0
Expected term (in years)		5 years 9 months
Risk free rate		1.22%
March 16, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	18.00%
Expected dividends	$ 0
Expected term (in years)	6 years 3 months
Risk free rate	2.23%

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Stock-Based Compensation - Summary Of Stock Option Activity (Details) - $ / shares		9 Months Ended	12 Months Ended
	Mar. 28, 2017	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Number of Shares
Outstanding beginning balance (in shares)		4,645,884	3,485,791	3,485,791
Granted (in shares)		793,738	1,274,549	0
Exercised (in shares)	(162,212)	(226,194)	0	0
Forfeited (in shares)		(5,148)	(114,456)	0	(13,437)
Expired (in shares)		0	0	0
Canceled (in shares)		(571,927)	0
Outstanding ending balance (in shares)		4,636,353	4,645,884	3,485,791	3,485,791
Exercisable ending balance (in shares)		3,847,763	2,354,466	1,399,704
Weighted Average Exercise Price
Outstanding beginning balance (in dollars per share)		$ 3.49	$ 3.96	$ 3.96
Granted (in dollars per share)		14.00	2.25	0.00
Exercised (in dollars per share)		3.96	0.00	0.00
Forfeited (in dollars per share)		14.00	3.96	0.00
Expired (in dollars per share)		0.00	0.00	0.00
Canceled (in dollars per share)		3.96	0.00
Outstanding ending balance (in dollars per share)		5.20	3.49	3.96	$ 3.96
Exercisable ending balance (in dollars per share)		3.39	3.77	3.96
Weighted Average Grant-Date Fair Value
Outstanding beginning balance (in dollars per share)		1.77	1.77	1.77
Granted (in dollars per share)		3.35	1.77	0.00
Exercised (in dollars per share)		1.77	0.00	0.00
Forfeited (in dollars per share)		3.35	1.77	0.00
Expired (in dollars per share)		0.00	0.00	0.00
Canceled (in dollars per share)		1.77	0.00
Outstanding ending balance (in dollars per share)		2.04	1.77	1.77	$ 1.77
Exercisable ending balance (in dollars per share)		$ 1.77	$ 1.77	$ 1.77

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Stock-Based Compensation - Summary Of RSU Activity (Details) - Restricted Stock Units (RSUs) - $ / shares			9 Months Ended
	Mar. 22, 2017	Sep. 30, 2013	Sep. 30, 2017
Number of Shares
Outstanding at Beginning of Period (in shares)			372,335
Granted (in shares)	372,335	372,335	691,585
Vested (in shares)			0
Exercised (in shares)			0
Forfeited (in shares)			(1,170)
Expired (in shares)			0
Canceled (in shares)			(372,335)
Outstanding at End of Period (in shares)			690,415
Weighted Average Grant Date Fair Value
Outstanding at January 1, 2017 (in dollars per share)			$ 3.89
Granted (in dollars per share)		$ 3.89	13.65
Vested (in dollars per share)			0.00
Exercised (in dollars per share)			0.00
Forfeited (in dollars per share)			13.65
Expired (in dollars per share)			0.00
Canceled (in dollars per share)			3.89
Outstanding at June 30, 2017 (in dollars per share)			$ 13.65

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Stock-Based Compensation - Summary Of Performance Shares Activity (Details) - Performance stock units - $ / shares	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding at Beginning of Period (in shares)	0
Target Shares Granted (in shares)	169,635
Target Shares Vested (in shares)	0
Target Shares Forfeited (in shares)	0
Outstanding at End of Period (in shares)	169,635
2017
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding at Beginning of Period (in shares)	0
Target Shares Granted (in shares)	169,635
Target Shares Vested (in shares)	0
Target Shares Forfeited (in shares)	0
Outstanding at End of Period (in shares)	169,635
Weighted Average Grant Date Fair Value per Share (in dollars per share)		$ 10.73

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Income Taxes - Tax Provision/Benefit (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Federal:
Current					$ 0	$ (1,092,437)
Deferred					(29,082,057)	(22,176,578)
Federal income tax expense (benefit)					(29,082,057)	(23,269,015)
State:
Current					0	(350,494)
Deferred					1,110,475	(1,768,061)
State income tax expense (benefit)					1,110,475	(2,118,555)
Income tax expense (benefit)	$ (96,000)	$ (6,946,000)	$ 128,000	$ (18,644,000)	$ (27,971,582)	$ (25,387,570)

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Income Taxes - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	35.00%
Operating loss carryforwards	$ 175.6
Valuation allowance	$ 0.9

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Income Taxes - Tax Reconciliation (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Tax at federal statutory rate					$ (28,391,642)	$ (24,934,089)
State taxes, net of federal benefit					(215,952)	(885,226)
Permanent differences					498,131	578,837
Valuation allowance					878,522	0
Other					(740,641)	(147,092)
Income tax expense (benefit)	$ (96,000)	$ (6,946,000)	$ 128,000	$ (18,644,000)	$ (27,971,582)	$ (25,387,570)

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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Assets, Gross [Abstract]
Accrued liabilities	$ 334,072	$ 471,223
Allowance for doubtful accounts	194,664	300,640
Goodwill and other intangible assets	10,953,458	13,021,523
Stock‑based compensation	1,692,288	1,119,355
Net operating losses	49,266,688	29,067,458
Other	388,813	388,813
Noncurrent deferred tax assets	62,829,983	44,369,012
Total deferred tax assets	62,829,983	44,369,012
Valuation allowance	(878,522)	0
Total deferred tax assets — net	61,951,461	44,369,012
Deferred Income Tax Liabilities
Property and equipment	(60,958,408)	(70,621,451)
Prepaid expenses	(1,506,831)	(1,498,531)
Other	(634,692)	(1,369,082)
Noncurrent deferred tax liabilities	(63,099,931)	(73,489,064)
Net deferred tax liability	$ (1,148,470)	$ (29,120,052)

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Related-Party Transactions - Additional Information (Details)	9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($) property	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) property	Dec. 31, 2015 USD ($)
Related Party Transaction [Line Items]
Operating leases, year 2	$ 426,000		$ 426,416
Operating leases, year 3	366,000		366,416
Operating leases, year 4	344,000		343,916
Payable to related parties	0		0	$ 0
Receivable from related parties	$ 40,000		$ 35,000	18,000
Related party leasing
Related Party Transaction [Line Items]
Lease term			5 years
Extension option term			5 years
Operating leases, year 2			$ 72,000
Operating leases, year 3			72,000
Operating leases, year 4			72,000
Operating leases, year 5			$ 72,000
Number of properties adjacent to corporate office subject to leases | property	5		5
Expenses with related party			$ 72,000
Related party transportation services
Related Party Transaction [Line Items]
Expenses with related party	$ 210,000	$ 120,000	186,000	164,000
Related party equipment rental
Related Party Transaction [Line Items]
Expenses with related party	$ 140,000	$ 140,000	192,000	$ 192,000
Corporate offices [Member] | Related party leasing
Related Party Transaction [Line Items]
Lease term	5 years
Extension option term	5 years
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 70,000
Property 1 | Related party leasing
Related Party Transaction [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	30,000
Operating leases, year 2	30,000
Operating leases, year 3	90,000
Operating leases, year 4	90,000
Operating leases, year 5	$ 180,000
Expenses with related party			30,000
Property 2 | Related party leasing
Related Party Transaction [Line Items]
Expenses with related party			30,000
Property 3 | Related party leasing
Related Party Transaction [Line Items]
Expenses with related party			90,000
Property 4 | Related party leasing
Related Party Transaction [Line Items]
Expenses with related party			90,000
Property 5 | Related party leasing
Related Party Transaction [Line Items]
Expenses with related party			$ 180,000

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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Operating leases expense	$ 1.0	$ 1.0	$ 1.4	$ 1.4

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Commitments and Contingencies - Operating Leases, Future Minimum Payments (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
2017	$ 116,000	$ 471,416
2018	426,000	426,416
2019	366,000	366,416
2020	344,000	343,916
2021 and thereafter	774,000	773,812
Total	$ 2,026,000	$ 2,381,976

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Equity Capitalization - Additional Information (Details)							9 Months Ended		12 Months Ended
	Jul. 01, 2017	Mar. 28, 2017 exectives director shares	Mar. 22, 2017 USD ($) $ / shares shares	Dec. 27, 2016 USD ($) $ / shares shares	Jul. 13, 2016 shares	Jun. 08, 2016 USD ($) shares	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Sep. 30, 2013 $ / shares
Subsidiary, Sale of Stock [Line Items]
Common stock, outstanding (in shares)							83,039,854		52,627,652	34,992,662
Proceeds from contributed capital | $						$ 40,425,000			$ 40,425,196	$ 0
Issuance of common stock (in shares)						17,817,925
Proceeds from issuance of convertible preferred stock | $				$ 170,000,000					$ 169,999,943	$ 0
Preferred stock, par value (in dollars per share) | $ / shares							$ 0.001		$ 0.001	$ 0.001
Payment of IPO costs | $							$ 15,099,000	$ 0	$ 7,488,768	$ 0
Preferred stock, issued (in shares)							0		16,999,990	0
Convertible preferred stock, conversion price (in dollars per share) | $ / shares									$ 10.00
Preferred stock, conversation price, percentage of IPO									90.00%
Preferred stock, dividend rate, percentage	7.00%
Preferred stock, dividend rate, payable period	30 days
Preferred stock, outstanding (in shares)							0		16,999,990	0
Common stock, par value (in dollars per share) | $ / shares							$ 0.001		$ 0.001	$ 0.001	$ 0.001
Proceeds from IPO | $							$ 185,500,000	0
Repayment of outstanding borrowings | $			$ 71,800,000				$ 164,638,000	$ 42,166,000	$ 41,295,302	$ 73,781,755
Number of executives | exectives		1
Number Of Directors | director		1
Exercisable (in shares)		226,194
Exercised (in shares)		162,212					226,194		0	0
Private Placement
Subsidiary, Sale of Stock [Line Items]
Shares of common stock sold, including shares sold by third parties (in shares)				16,999,990
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.001
Payment of IPO costs | $				$ 7,000,000
Sale of stock, consideration received on transaction | $				$ 163,000,000
IPO
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock (in shares)			13,250,000
Shares of common stock sold, including shares sold by third parties (in shares)			25,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.001
Stock price (in dollars per share) | $ / shares			$ 14.00
Shares sold by third party (in shares)			11,750,000
Proceeds from IPO | $			$ 170,100,000
Payment of underwriting discounts and commissions | $			10,900,000
Payments of stock issuance costs, other | $			$ 4,500,000
Series A convertible preferred stock
Subsidiary, Sale of Stock [Line Items]
Preferred stock, issued (in shares)									16,999,990
Performance stock units | IPO
Subsidiary, Sale of Stock [Line Items]
Number of shares of outstanding stock converted (in shares)			16,999,990
Common Stock | IPO
Subsidiary, Sale of Stock [Line Items]
Shares of common stock issued for each share of preferred stock converted			1.45
Series A Preferred Stock Converted To Common Stock | IPO
Subsidiary, Sale of Stock [Line Items]
Shares of common stock issued for each share of preferred stock converted			1
Energy Capital Partners and affiliates
Subsidiary, Sale of Stock [Line Items]
Ownership percentage									91.80%
Energy Capital Partners and affiliates
Subsidiary, Sale of Stock [Line Items]
Common stock, outstanding (in shares)									48,330,667
Proceeds from contributed capital | $						$ 40,425,000
Issuance of common stock (in shares)					189,403	18,007,328
Energy Capital Partners
Subsidiary, Sale of Stock [Line Items]
Common stock, outstanding (in shares)										30,438,955
Energy Capital Partners Affiliates
Subsidiary, Sale of Stock [Line Items]
Common stock, outstanding (in shares)										34,992,662