10-Q

Table of Contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2023

OR

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

For the transition period from ______ to ______

Commission file number 001-40503

NET Power Inc.

(Exact name of registrant as specified in its charter)

Delaware	98-1580612
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
320 Roney St. Suite 200 Durham, NC	27701
(Address of Principal Executive Offices)	(Zip Code)

(919) 287-4750

Registrant's telephone number, including area code

404 Hunt St., Suite 410

Durham, NC

(Former name, former address and former fiscal year, if changed since last report)

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Class A Common Stock	NPWR	The New York Stock Exchange
Warrants, each exercisable for one share of Class A Common Stock at a price of $11.50	NPWR WS	The New York Stock Exchange

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

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this

chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	o	Accelerated filer	o
Non-accelerated filer	x	Smaller reporting company	x
		Emerging growth company	x

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

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

APPLICABLE ONLY TO REGISTRANTS INVOLVED IN BANKRUPTCY

PROCEEDINGS DURING THE PRECEDING FIVE YEARS:

Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Section 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court. o Yes x No

APPLICABLE ONLY TO CORPORATE ISSUERS:

The registrant had outstanding 71,026,680 shares of Class A Common Stock and 142,038,655 shares of Class B Common Stock as of November 10, 2023.

Table of Contents

TABLE OF CONTENTS

		Page
	Certain Defined Terms	1
	Cautionary Note Regarding Forward-Looking Statements	4
PART I.	FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited)	5
	Consolidated Balance Sheets (Unaudited)	5
	Consolidated Statements of Operations and Comprehensive Loss (Unaudited)	7
	Consolidated Statement of Shareholders’ Equity and Non-Controlling Interest (Successor) (Unaudited)	8
	Consolidated Statement of Members’ Equity (Predecessor) (Unaudited)	9
	Consolidated Statements of Cash Flows (Unaudited)	10
	Notes to Unaudited Consolidated Financial Statements	11
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	31
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	41
Item 4.	Controls and Procedures	41
PART II.	OTHER INFORMATION
Item 1.	Legal Proceedings	42
Item 1A.	Risk Factors	42
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	42
Item 3.	Defaults Upon Senior Securities	42
Item 4.	Mine Safety Disclosures	42
Item 5.	Other Information	42
Item 6.	Exhibits	42
Signatures		44

Table of Contents

Certain Defined Terms

Unless otherwise expressly stated or, unless the context otherwise requires, references in this Quarterly Report on Form 10-Q (this “Report”) to:

•“8 Rivers” means 8 Rivers Capital, LLC, a Delaware limited liability company (a company controlled by SK);

•“Amended and Restated JDA” means the Amended and Restated Joint Development Agreement, dated December 13, 2022, by and among Old NET Power, RONI, RONI OpCo, NPI and NPT, as amended, supplemented or otherwise modified from time to time in accordance with its terms;

•“Baker Hughes” means Baker Hughes Company, a Delaware corporation;

•“BHES” means Baker Hughes Energy Services LLC, a Delaware limited liability company and affiliate of Baker Hughes;

•“Board” or “Board of Directors” means the board of directors of the Company.

•“Business Combination Agreement” means the Business Combination Agreement, dated as of December 13, 2022, by and among RONI, RONI OpCo, Buyer, Merger Sub and Old NET Power, as amended by the First Amendment to the Business Combination Agreement, dated as of April 23, 2023, by and between Buyer and Old NET Power;

•“Business Combination” means the Domestications, the Merger and other transactions contemplated by the Business Combination Agreement, collectively, including the PIPE Financing;

•“Buyer” means Topo Buyer Co, LLC, a Delaware limited liability company and a direct, wholly owned subsidiary of OpCo (following the Domestications) or of RONI OpCo (prior to the Domestications);

•"Cash-based expense of BHES Amended and Restated JDA" means the portion of costs incurred under the Amended and Restated JDA payabel by the Company in cash;

•“Class A Common Stock” means the Class A common stock, par value $0.0001 per share, of NET Power;

•“Class B Common Stock” means the Class B common stock, par value $0.0001 per share, of NET Power;

•“Closing” means the consummation of the Business Combination contemplated by the Business Combination Agreement;

•“Closing Date” means June 8, 2023, the date on which the Closing occurred;

•“Common Stock” means the Class A Common Stock and Class B Common Stock;

•“Company,” “our,” “we” or “us” means, prior to the Business Combination, RONI or Old NET Power, as the context suggests, and, following the Business Combination, NET Power Inc., in each case, with its consolidated subsidiaries.

•“Constellation” means Constellation Energy Generation, LLC, a Pennsylvania limited liability company formerly known as Exelon Generation Company, LLC;

•“Domestication” means the change of RONI’s jurisdiction of registration by deregistering as a Cayman Islands exempted company and continuing and domesticating as a corporation registered under the laws of the State of Delaware, upon which RONI changed its name to NET Power Inc.;

•“Domestications” means the Domestication and the OpCo Domestication;

•“Exchange Act” means the Securities Exchange Act of 1934, as amended.

•“IPO” means RONI’s initial public offering, which was consummated on June 18, 2021;

•“Legacy NET Power Holders” means the holders of equity securities of Old NET Power prior to the consummation of the Merger;

1

Table of Contents

•“Merger” means the merger of Merger Sub with and into Old NET Power pursuant to the Business Combination Agreement, in which Old NET Power survived and became a direct, wholly owned subsidiary of Buyer;

•“Merger Sub” means Topo Merger Sub, LLC, a Delaware limited liability company and a direct, wholly owned subsidiary of Buyer;

•“NET Power” means NET Power Inc., a Delaware corporation (f/k/a Rice Acquisition Corp. II), with its consolidated subsidiaries (unless the context otherwise indicates), upon and after the Domestication;

•“NPI” means Nuovo Pignone International, S.r.l., an Italian limited liability company and affiliate of Baker Hughes;

•“NPT” means Nuovo Pignone Tecnologie S.r.l., an Italian limited liability company and affiliate of Baker Hughes;

•“NYSE” means the New York Stock Exchange;

•“Old NET Power” means, prior to the consummation of the Merger, NET Power, LLC, a Delaware limited liability company;

•“OpCo” means NET Power Operations LLC, a Delaware limited liability company (f/k/a Rice Acquisition Holdings II LLC), upon and after the OpCo Domestication;

•“OpCo Domestication” means the change of RONI OpCo’s jurisdiction of registration by deregistering as a Cayman Islands exempted company and continuing and domesticating as a limited liability company registered under the laws of the State of Delaware, upon which RONI OpCo changed its name to NET Power Operations LLC;

•“OpCo Unitholder” means a holder of OpCo Units;

•“OpCo Units” means the units of OpCo;

•“Original JDA” means the Joint Development Agreement, dated February 3, 2022, by and among Old NET Power, NPI and NPT, as amended by the First Amendment to Joint Development Agreement, dated effective June 30, 2022, by and among the same parties;

•“OXY” means OLCV NET Power, LLC, a Delaware limited liability company;

•“PIPE Financing” means the issuance and sale of 54,044,995 shares of Class A Common Stock for aggregate consideration of $540,449,950 in private placements pursuant to subscription agreements that RONI entered into with certain qualified institutional buyers and accredited investors, which was consummated immediately prior to the Merger;

•“PIPE Investors” means the investors who participated in the PIPE Financing;

•"Predecessor Period" means the period presented in the consolidated financial statements contained in this Report or the accompanying footnotes that relates to Predecessor, as defined and described in Note C to the consolidated financial statements contained in this Report;

•“Preferred Stock” means shares of NET Power preferred stock, par value $0.0001;

•“Private Placement Warrants” means the 10,900,000 warrants to purchase shares of Class A Common Stock that were issued and sold to Sponsor in a private placement in connection with the IPO;

•“Public Warrants” means the warrants to purchase shares of Class A Common Stock that were issued and sold as part the units of RONI in the IPO;

•“RONI” means Rice Acquisition Corp. II, a Cayman Islands exempted company, prior to the Domestication;

•“RONI OpCo” means Rice Acquisition Holdings II LLC, a Cayman Islands limited liability company and direct subsidiary of RONI, prior to the Domestications;

2

Table of Contents

•“SEC” means the Securities and Exchange Commission;

•“Securities Act” means the Securities Act of 1933, as amended;

•“Sponsor” means Rice Acquisition Sponsor II LLC, a Delaware limited liability company;

•"Successor Period" means the period presented in the consolidated financial statements contained in this Report or the accompany footnotes that relates to Successor, as defined and described in Note C to the consolidated financial statements contained in this Report;

•“Tax Receivable Agreement” means the Tax Receivable Agreement, dated June 8, 2023, entered into by NET Power and OpCo with OpCo Unitholders who received OpCo Units pursuant to the Business Combination Agreement as consideration for equity interests in Old NET Power and the Agent (as defined therein);

•"Up-C" means umbrella partnership, C corporation, which describes a corporate structure in which an ultimate c corporation parent consolidates a partnership or partnership structure treated as a pass-through entity for US state and federal purposes tax; and

•“Warrants” means, collectively, the Public Warrants and Private Placement Warrants.

In addition, the following is a glossary of key industry terms used herein:

•“CO2” means carbon dioxide;

•“MW” means megawatt;

•“MWe” means megawatt electrical;

•“MWth” means megawatt thermal;

•“NOX” means nitrogen oxides; and

•“SOX” means sulfur oxides.

3

Table of Contents

Cautionary Note Regarding Forward-Looking Statements

This Report contains “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. Statements that do not relate strictly to historical or current facts are forward-looking and usually identified by the use of words such as “anticipate,” “believe,” “could,” “estimate,” “expect,” “forecast,” “future,” “intend,” “may,” “opportunity,” “plan,” “project,” “seek,” “should,” “strategy,” “will,” “will likely result,” “would” and other similar words and expressions, but the absence of these words does not mean that a statement is not forward-looking. Forward-looking statements may relate to the development of the Company’s technology, the anticipated demand for the Company’s technology and the markets in which the Company operates, the timing of the deployment of plant deliveries, and the Company’s business strategies, capital requirements, potential growth opportunities and expectations for future performance (financial or otherwise). Forward-looking statements are based on current expectations, estimates, projections, targets, opinions and/or beliefs of the Company, and such statements involve known and unknown risks, uncertainties and other factors.

The risks and uncertainties that could cause those actual results to differ materially from those expressed or implied by these forward-looking statements include, but are not limited to: (i) risks relating to the uncertainty of the projected financial information with respect to the Company and risks related to the Company’s ability to meet its projections; (ii) the ability to recognize the anticipated benefits of the Business Combination, which may be affected by, among other things, competition, the ability of the Company to grow and manage growth profitably and the ability of the Company retain its management and key employees; (iii) the Company’s ability to utilize its net operating loss and tax credit carryforwards effectively; (iv) the capital-intensive nature of the Company’s business model, which may require the Company to raise additional capital in the future; (v) barriers the Company may face in its attempts to deploy and commercialize its technology; (vi) the complexity of the machinery the Company relies on for its operations and development; (vii) the Company’s ability to establish and maintain supply relationships; (viii) risks related to the Company’s arrangements with third parties for the development, commercialization and deployment of technology associated with the Company’s technology; (ix) risks related to the Company’s other strategic investors and partners; (x) the Company’s ability to successfully commercialize its operations; (xi) the availability and cost of raw materials; (xii) the ability of the Company’s supply base to scale to meet the Company’s anticipated growth; (xiii) the Company’s ability to expand internationally; (xiv) the Company’s ability to update the design, construction and operations of its technology; (xv) the impact of potential delays in discovering manufacturing and construction issues; (xvi) the possibility of damage to the Company’s Texas facilities as a result of natural disasters; (xvii) the ability of commercial plants using the Company’s technology to efficiently provide net power output; (xviii) the Company’s ability to obtain and retain licenses; (xix) the Company’s ability to establish an initial commercial scale plant; (xx) the Company’s ability to license to large customers; (xxi) the Company’s ability to accurately estimate future commercial demand; (xxii) the Company’s ability to adapt to the rapidly evolving and competitive natural and renewable power industry; (xxiii) the Company’s ability to comply with all applicable laws and regulations; (xxiv) the impact of public perception of fossil fuel-derived energy on the Company’s business; (xxv) any political or other disruptions in gas producing nations; (xxvi) the Company’s ability to protect its intellectual property and the intellectual property it licenses; (xxvii) risks relating to data privacy and cybersecurity, including the potential for cyberattacks or security incidents that could disrupt our or our service providers’ operations; (xviii) the Company’s ability to meet stock exchange listing standards following the Business Combination; (xxix) potential litigation that may be instituted against the Company; and (xxx) other risks and uncertainties indicated in the Registration Statement on Form S-1 (File No. 333-273183), originally filed by the Company with the SEC on July 7, 2023, as subsequently amended on September 15, 2023 (the “Registration Statement”), including those under “Risk Factors” therein, and other documents subsequently filed with the SEC by the Company.

Should one or more of these risks or uncertainties materialize, or should any of the assumptions made by our management prove incorrect, actual results may vary in material respects from those projected in the forward-looking statements contained in this Report. Accordingly, you should not place undue reliance on these forward-looking statements in deciding whether to invest in our securities.

Forward-looking statements speak only as of the date they are made. Except to the extent required by applicable law or regulation, we undertake no obligation to update the forward-looking statements contained herein to reflect events or circumstances after the date of this Report or to reflect the occurrence of unanticipated events. The Company gives no assurance that it will achieve its expectations.

4

Table of Contents

Part I - Financial Information

Item 1. Financial Statements

Consolidated Balance Sheets (Unaudited) (In thousands, except share and unit amounts)

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
ASSETS
Current Assets
Cash	$	545,248	$	5,164
Short term investments	100,000		—
Trade receivables, net	—		352
Interest receivable	2,903		—
Prepaid expenses	2,662		184
Other current assets	40		1,795
Total Current Assets	650,853		7,495
Long Term Assets
Intangible assets, net	1,324,078		263
Goodwill	423,953		—
Property, plant and equipment, net	91,758		69,595
Lease right-of-use asset	181		784
Total Long Term Assets	1,839,970		70,642
Total Assets	$	2,490,823	$	78,137
LIABILITIES AND EQUITY
Current Liabilities
Accounts payable	$	1,687	$	577
Accrued liabilities	7,431		2,392
Due to related parties	288		178
Lease liability	3		130
Option liability	—		5,174
Total Current Liabilities	9,409		8,451
Long Term Liabilities
Due to related parties	—		2,212
Earnout shares liability	4,546		—
Warrant liability	140,534		—
Asset retirement obligation	2,018		2,416
Lease liability	—		656
TRA liability	9,376		—
Deferred taxes	63,609		—
Total Long Term Liabilities	220,083		5,284
Total Liabilities	229,492		13,735
Commitments and Contingencies (Note N)
Mezzanine Shareholders' and Members' Equity
Redeemable non-controlling interests in subsidiary	2,157,310		—
Shareholders’ and Members’ Equity

5

Table of Contents

Capital stock 4,987,845 units authorized; 3,722,355 units issued and outstanding as of December 31, 2022 (Predecessor)	—		262,622
Preference shares, $.0001 par value; 1,000,000 shares authorized; no shares issued or outstanding as of September 30, 2023 (Successor) & December 31, 2022 (Predecessor)	—		—
Class A Common Stock, $.0001 par value; 520,000,000 shares authorized; 71,014,190 shares issued and outstanding as of September 30, 2023 (Successor) & no shares issued and outstanding as of December 31, 2022 (Predecessor)	7		—
Class B Common Stock, $.0001 par value; 310,000,000 shares authorized; 141,529,513 shares issued and outstanding as of September 30, 2023 (Successor) & no shares issued and outstanding as of December 31, 2022 (Predecessor)	14		—
Additional paid-in-capital	193,361		26,288
Accumulated other comprehensive income	—		17
Accumulated Deficit
Members’ equity	—		(224,525)
Shareholders’ equity	(89,361)		—
Total Shareholders' and Members' Equity	104,021		64,402
Total Liabilities, Mezzanine Shareholders' and Members' Equity and Shareholders’ and Members’ Equity	$	2,490,823	$	78,137

6

Table of Contents

Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (In thousands, except unit, share, per unit and per share amounts)

	Period from				Period from
	July 1 – September 30, 2023 (Successor)		July 1 – September 30, 2022 (Predecessor)		June 8 – September 30, 2023 (Successor)		January 1 – June 7, 2023 (Predecessor)		January 1 – September 30, 2022 (Predecessor)
Revenue
Revenue	$	—	$	141	$	—	$	175	$	574
Cost of revenue	3		11		3		3		189
Cost of revenue - related party	—		38		—		—		79
Gross Profit (Loss)	(3)		92		(3)		172		306
Operating Expenses
General and administrative	7,949		3,960		32,250		11,903		12,531
General and administrative – related party	147		162		158		228		383
Sales and marketing	931		136		1,087		869		504
Research and development	8,658		590		14,401		1,643		2,264
Research and development – related party	346		4,173		433		12,676		10,550
Project development	582		—		698		1,191		—
Option settlement - related party	—		—		79,054		—		—
Depreciation, amortization and accretion	20,052		3,325		24,978		5,812		9,974
Total Operating Expenses	38,665		12,346		153,059		34,322		36,206
Operating Loss	(38,668)		(12,254)		(153,062)		(34,150)		(35,900)
Other Income (Expense)
Interest income (expense)	8,675		—		10,800		4		(1,470)
Other income (expense)	(61,983)		34		(60,970)		(30)		35
Net Other Income (Expense)	(53,308)		34		(50,170)		(26)		(1,435)
Net Loss before Income Tax	(91,976)		(12,220)		(203,232)		(34,176)		(37,335)
Income tax expense (benefit)	(10)		—		(681)		—		—
Net Loss after Income Tax	(91,966)		(12,220)		(202,551)		(34,176)		(37,335)
Net Loss attributable to non-controlling interests	(61,402)		—		(136,987)		—		—
Net Loss attributable to NET Power Inc.	(30,564)		(12,220)		(65,564)		(34,176)		(37,335)
Other Comprehensive Gain (Loss)
Foreign currency translation gain (loss)	1		(5)		—		—		(5)
Total Other Comprehensive Gain (Loss)	1		(5)		—		—		(5)
Comprehensive Loss	(91,965)		(12,225)		(202,551)		(34,176)		(37,340)
Comprehensive Loss attributable to non-controlling interests	(61,402)		—		(136,987)		—		—
Comprehensive Loss attributable to NET Power Inc.	$	(30,563)	$	(12,225)	$	(65,564)	$	(34,176)	$	(37,340)
Net Loss per share of Class A Common Stock or per membership interest	$	(0.44)	$	(10.69)	$	(0.96)	$	(9.07)	$	(13.15)
Weighted average shares of Class A Common Stock or membership interests, basic and diluted	68,966,972		1,143,430		68,644,032		3,766,871		2,838,388

7

Table of Contents

Consolidated Statement of Shareholders’ Equity and Non-Controlling Interest (Unaudited) (Successor) (In thousands, except share amounts)

	Class A Common Stock			Class B Common Stock			Class A Ordinary Shares				Class B Ordinary Shares				Additional Paid-in-Capital		Accumulated Deficit		Total Stockholders' Equity		Non-controlling Interests		Class A Ordinary Shares			Total Mezzanine Equity
	Shares	Amount		Shares	Amount		Shares		Amount		Shares		Amount										Shares	Amount
Balance at June 8, 2023 (Successor)	—	$	—	—	$	—	2,500		$	—	8,625,000		$	1	$	—	$	(98,966)	$	(98,965)	$	—	34,500,000	$	356,318	$	356,318
Sponsor forfeiture of RONI Class B ordinary shares and reservation of earnout shares	—	—		—	—		—		—		(1,986,775)		—		—		—		—		—		—	—		—
Redemption of Class A ordinary shares by RONI public shareholders	—	—		—	—		—		—		—		—		—		—		—		—		(21,195,224)	(218,983)		(218,983)
Redemption of Class A Common Stock	3,606,657	—		(3,606,657)	—		—		—		—		—		50,526		—		50,526		(50,526)		—	—		(50,526)
Conversion of RONI Class A and Class B ordinary shares into NET Power Inc. Class A and Class B Common Stock, respectively	13,307,276	1		6,638,225	1		(2,500)		—		(6,638,225)		(1)		60,045		—		60,046		87,094		(13,304,776)	(137,335)		(50,241)
Issuance of RONI Class A Common Stock to PIPE investors	54,044,995	6		—	—		—		—		—		—		540,445		—		540,451		—		—	—		—
Issuance of Class A Common Stock	52,523	—		—	—		—		—		—		—		—		—		—		—		—	—		—
Equity awards vested due to Business Combination	—	—		8,356,635	1		—		—		—		—		542		(542)		1		109,639		—	—		109,639
Issuance of RONI Class B Common Stock to former NET Power, LLC unitholders	—	—		129,822,703	12		—		—		—		—		(940)		75,711		74,783		1,677,546		—	—		1,677,546
Exercise of warrants	2,739	—		—	—		—		—		—		—		47		—		47		—		—	—		—
Member tax distributions	—	—		—	—		—		—		—		—		—		—		—		(181)		—	—		(181)
Establishment of liabilities under tax receivable agreement	—	—		—	—		—		—		—		—		(2,207)		—		(2,207)		—		—	—		—
Vesting of earnout shares	—	—		—	—		—		—		—		—		—		—		—		9,055		—	—		9,055
Amortization of share based payments	—	—		318,607	—		—		—		—		—		261		—		261		6,312		—	—		6,312
Adjustment of redeemable non-controlling interest to redemption value	—	—		—	—		—		—		—		—		(455,358)		—		(455,358)		455,358		—	—		455,358
Comprehensive Loss	—	—		—	—		—		—		—		—		—		(65,564)		(65,564)		(136,987)		—	—		(136,987)
Balance at September 30, 2023 (Successor)	71,014,190	$	7	141,529,513	$	14	$	—	$	—	$	—	$	—	$	193,361	$	(89,361)	$	104,021	$	2,157,310	—	$	—	$	2,157,310

	Class A Common Stock			Class B Common Stock			Class A Ordinary Shares			Class B Ordinary Shares			Additional Paid-in-Capital		Accumulated Deficit		Total Stockholders' Equity		Non-controlling Interests		Class A Ordinary Shares			Total Mezzanine Equity
	Shares	Amount		Shares	Amount		Shares	Amount		Shares	Amount										Shares	Amount
Balance at July 1, 2023 (Successor)	67,352,271	$	7	142,711,590	$	14	—	$	—	—	$	—	$	514,219	$	(58,798)	$	455,442	$	1,885,319	—	$	—	$	1,885,319
Exercise of warrants	2,739	—		—	—		—	—		—	—		47		—		47		—		—	—		—
Issuance of Class A Common Stock	52,523	—		—	—		—	—		—	—		—		—		—		—		—	—		—
Issuance of RONI Class B Common Stock to former NET Power, LLC unitholders	—	—		2,105,973	—		—	—		—	—		(928)		—		(928)		928		—	—		928
Redemption of Class A Common Stock	3,606,657	—		(3,606,657)	—		—	—		—	—		50,526		—		50,526		(50,526)		—	—		(50,526)
Member tax distributions	—	—		—	—		—	—		—	—		—		—		—		(181)		—	—		(181)
Establishment of liabilities under tax receivable agreement	—	—		—	—		—	—		—	—		(2,207)		—		(2,207)		—		—	—		—
Vesting of earnout shares	—	—		—	—		—	—		—	—		—		—		—		9,055		—	—		9,055
Amortization of share based payments	—	—		318,607	—		—	—		—	—		261		—		261		5,560		—	—		5,560
Adjustment of redeemable non-controlling interest to redemption value	—	—		—	—		—	—		—	—		(368,557)		—		(368,557)		368,557		—	—		368,557
Comprehensive Loss	—	—		—	—		—	—		—	—		—		(30,563)		(30,563)		(61,402)		—	—		(61,402)
Balance at September 30, 2023 (Successor)	71,014,190	$	7	141,529,513	$	14	—	$	—	—	$	—	$	193,361	$	(89,361)	$	104,021	$	2,157,310	—	$	—	$	2,157,310

8

Table of Contents

Consolidated Statement of Members’ Equity (Unaudited) (Predecessor) (In thousands, except unit amounts)

	Membership Interests			Additional Paid-in-Capital		Accumulated Other Comprehensive Income		Accumulated Deficit		Total Members’ Equity
	Units	Amount
Balance at December 31, 2022 (Predecessor)	3,722,355	$	262,622	$	26,288	$	17	$	(224,525)	$	64,402
Issuance of shares to:
Occidental Petroleum	37,152	11,859		—		—		—		11,859
Constellation	28,764	9,181		—		—		—		9,181
BHES (Bonus Shares)	—	—		4,690		—		—		4,690
BHES (In-Kind Shares)	15,491	3,269		634		—		—		3,903
Vesting of Profits Interest	—	—		2,864		—		—		2,864
Comprehensive Loss	—	—		—		—		(34,176)		(34,176)
Balance at June 7, 2023 (Predecessor)	3,803,762	$	286,931	$	34,476	$	17	$	(258,701)	$	62,723

	Membership Interests			Additional Paid-in-Capital		Accumulated Other Comprehensive Income		Accumulated Deficit		Total Members’ Equity
	Units	Amount
Balance at July 1, 2022 (Predecessor)	3,716,149	$	261,312	$	16,282	$	20	$	(194,862)	$	82,752
Issuance of shares to:
BHES (Bonus Shares)	—	—		2,689		—		—		2,689
BHES (In-Kind Shares)	2,782	587		135		—		—		722
Vesting of Profits Interest	—	—		2,082		—		—		2,082
Comprehensive Loss	—	—		—		(5)		(12,220)		(12,225)
Balance as of September 30, 2022 (Predecessor)	3,718,931	$	261,899	$	21,188	$	15	$	(207,082)	$	76,020

	Membership Interests			Additional Paid-in-Capital		Accumulated Other Comprehensive Income		Accumulated Deficit		Total Members’ Equity
	Units	Amount
Balance at December 31, 2021 (Predecessor)	3,555,553	$	227,960	$	9,275	$	20	$	(169,747)	$	67,508
Issuance of shares to:
BHES	142,180	30,000		—		—		—		30,000
(Less Equity Issuance Cost)	—	(534)		—		—		—		(534)
BHES (Bonus Shares)	17,799	3,756		3,414		—		—		7,170
BHES (In-Kind Shares)	3,399	717		722		—		—		1,439
Vesting of Profits Interest	—	—		7,777		—		—		7,777
Comprehensive Loss	—	—		—		(5)		(37,335)		(37,340)
Balance as of September 30, 2022 (Predecessor)	3,718,931	$	261,899	$	21,188	$	15	$	(207,082)	$	76,020

9

Table of Contents

Consolidated Statements of Cash Flows (Unaudited) (In thousands)

	Period from
	June 8 – September 30, 2023 (Successor)		January 1 - June 7, 2023 (Predecessor)		January 1 – September 30, 2022 (Predecessor)
Cash Flows from Operating Activities
Net Loss after Tax	$	(202,551)	$	(34,176)	$	(37,335)
Adjustments to reconcile net loss to net cash (used in) operating activities:
Depreciation	3,972		5,700		9,797
Amortization	20,922		9		16
Accretion	51		102		161
Non-cash interest expense	—		30		1,388
Non-cash lease expense	87		59		—
Conversion of equity awards	86,585		—		—
Allowance for doubtful accounts	—		352		—
Deferred taxes	(681)		—		—
Change in fair value of earnout shares liability	1,497		—		—
Change in fair value of warrant liability	58,344		—		—
Vesting of Profits Interests	—		2,864		7,777
Vesting of earnout shares	1,118		—		—
Amortization of share based payments	6,572		8,593		8,609
Changes in operating assets and liabilities:
Trade receivables	—		—		(344)
Interest receivable	(2,903)		—		—
Prepaid expenses	(2,026)		(453)		515
Other current assets	91		1,765		(660)
Accounts payable	(887)		1,768		(1,478)
Accrued liabilities	(5,796)		(384)		(43)
Lease liabilities	(56)		(55)		—
Due to related parties – short term	288		5,414		(2,291)
Due to related parties – long term	—		(2,211)		1,257
Net Cash (Used in) Operating Activities	(35,373)		(10,623)		(12,631)
Cash Flows from Investing Activities
Cash acquired as part of Business Combination (Note C)	7,947		—		—
Acquisition of short term investments	(100,000)		—		—
Acquisition of property, plant and equipment	(3,875)		(2,431)		—
Net Cash (Used in) Investing Activities	(95,928)		(2,431)		—
Cash Flows from Financing Activities
Repurchase of redeemed Class A Ordinary Shares	(218,983)		—		—
Issuance of Class A Common Stock from warrant exercise	47		—		—
Member tax distributions	(181)		—		—
Proceeds from PIPE financing, net of issuance costs	540,451		—		—
Issuance of equity under JDA as a result of Business Combination (Note C)	9,917		—		—
Payment of transaction expenses	(11,722)		—		—
Member loan proceeds	—		—		2,000
Member loan repayments	—		—		(10,000)
Share issuances	—		15,836		30,000
(Less equity issuance costs)	—		—		(534)
Net Cash Provided by Financing Activities	319,529		15,836		21,466
Net Increase in Cash	188,228		2,782		8,835
Effect of foreign currency exchange rate changes on cash	1		—		(5)
Cash, beginning of period	357,019		5,164		445
Cash, end of period	$	545,248	$	7,946	$	9,275
Supplemental Disclosures of Cash Flow Information
Cash paid for interest	$	—	$	—	$	81
Remeasurement of lease liabilities and right of use assets due to lease modification (Note M)	$	(672)	$	—	$	—

10

Table of Contents

Notes to Consolidated Financial Statements (In thousands, except share, per share and unit amounts, unless otherwise noted)

NOTE A — Organization and Nature of the Business

NET Power Inc. has developed a proprietary process for producing electricity using a predominantly carbon dioxide working fluid that involves the capture and reuse, sale and sequestration of carbon dioxide (the "NET Power Cycle"). The NET Power Cycle is the subject of U.S. and foreign patents, as well as additional applications and provisional applications on file with the United States Patent and Trademark Office and international patent authorities. The Company’s technology is designed to generate electricity from natural gas that is cost-competitive with conventional technologies, while eliminating nearly all air emissions.

The Company commissioned a 50 MWth natural gas-fired demonstration power plant (“Demonstration Plant”) to allow sufficient demonstration and testing of the NET Power Cycle and its components. The Company achieved first-fire at the Demonstration Plant in May 2018, after two years of development. Additional testing occurred periodically thereafter, including a three-month test campaign in 2021 which resulted in a grid synchronization. The successful first-fire and 2021 testing campaign of the Demonstration Plant represent critical milestones as they supported validation of the technical foundation of the NET Power Cycle. Over the next several years, the Company plans to conduct additional research and testing campaigns at its Demonstration Plant and construct its first utility-scale plant.

The Company’s current activities are subject to significant risks, including cost over-runs in the testing and operation of the Demonstration Plant, technical problems with the NET Power Cycle, and development of competing clean-energy technology sooner or at a lesser cost than the NET Power Cycle.

The Company consummated the Business Combination (Note C) on June 8, 2023.

NOTE B — Basis of Presentation and Significant Accounting Policies

Basis of Presentation - The accompanying unaudited consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America ("US GAAP") and include some amounts that are based upon management estimates and judgments. In the Company's opinion, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly the Company's financial position, results of operations and cash flows for the periods presented. Such adjustments consist solely of normal, recurring adjustments.

Recently Issued Accounting Standards - During October, 2023, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") 2023-06 - Disclosure Improvements: Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative ("ASU 2023-06"). ASU 2023-06 incorporates 14 of the 27 disclosure requirements published in SEC Release No. 33-10532 - Disclosure Update and Simplification into various topics within the Accounting Standards Codification ("ASC"). ASU 2023-06's amendments represent clarifications to, or technical corrections of, current requirements. For SEC registrants, the effective date for each amendment will be the date on which the SEC removes that related disclosure from its rules. Early adoption is prohibited. The Company does not expect ASU 2023-06 to have a material effect on its financial statements.

Principles of Consolidation – The Consolidated Balance Sheets and Consolidated Statements of Operations and Comprehensive Loss include the accounts of subsidiaries that NET Power Inc. consolidates according to the rules set forth in ASC Topic 810 – Consolidation (“ASC 810”). The Company consolidates all subsidiaries in which it owns a 50.0% or greater ownership interest and all variable interest entities ("VIE's") to which it is deemed to represent the primary beneficiary, as described below. The Consolidated Balance Sheets and the Consolidated Statement of Operations and Comprehensive Loss include the accounts of the following wholly-owned subsidiaries and consolidated VIE's: NET Power Europe LTD (“NP Europe”); NET Power Friendship 7, LLC; NET Power Technology, LLC; NET Power Atlas, LLC; NET Power Canaveral, LLC; NET Power Services, LLC, NET Power Management Holdings Inc.; NET Power Management LLC; NET Power Operations LLC ("OpCo"); NET Power Intermediate LLC and NET Power, LLC. Intercompany balances have been eliminated through the consolidation process.

ASC 810 requires that a reporting entity that possesses a controlling financial interest in a VIE consolidate that VIE. A controlling financial interest will have both of the following characteristics: (a) the power to direct the activities that most significantly impact the VIE's economic performance; and (b) the obligation to absorb the VIE's losses and the right to receive benefits that are significant to the VIE. The Company determined that NET Power Operations LLC meets the definition of a VIE and that the Company became the primary beneficiary of it beginning on the Closing Date of the

11

Table of Contents

Business Combination (Note C); therefore, the Company has consolidated NET Power Operations LLC from the date of the Business Combination.

Business Combination – The Company applies the guidance within ASC Topic 805 – Business Combinations ("ASC 805") to all merger and acquisition transactions, including the Business Combination (Note C), through which the Company obtains control over one or more other businesses.

The Company may elect the acquisition method for all transactions and other events through which the Company obtains control over one or more other businesses, including the Business Combination (Note C). Under the acquisition method, assets acquired and liabilities assumed are measured at fair value as of the acquisition date. Liabilities related to contingent consideration are recognized on the acquisition date and re-measured at fair value in each subsequent reporting period, if the contingent consideration is liability classified. Goodwill is recognized as the excess of the consideration transferred over the fair value of the net identifiable assets acquired.

Segment Reporting - In accordance with ASC Topic 280 – Segment Reporting, the Company has one operating segment and one reportable segment. The Company has one line of business.

Revenue Recognition, Trade Receivables and Allowance for Doubtful Accounts – The Company follows the guidance within ASC Topic 606 – Revenue from Contracts with Customers to determine how and when it recognizes revenues. The Company accounts for a customer contract when both parties have approved the contract and are committed to perform their respective contractual obligations, each party’s rights can be identified, payment terms can be identified, the contract has commercial substance and it is probable that the Company will collect the consideration to which it is entitled.

When billed in advance, the payment is deferred and recognized upon delivery of the service. Collectability is assessed based on a number of factors including collection history and customer creditworthiness. If collectability of substantially all consideration to which the Company is entitled under the contract is determined to be not probable, revenue is not recorded until collectability becomes probable. Revenue is recorded based on the transaction price excluding amounts collected on behalf of third parties, such as sales taxes collected and remitted to governmental authorities.

Trade receivables are recorded at the invoiced amount and do not bear interest. The Company calculates an allowance for doubtful accounts based on a risk assessment performed when trade receivables are recognized. The allowance is calculated in accordance with ASC Topic 326 - Current Expected Credit Losses. Write-offs are recorded at the time when trade receivables are deemed uncollectible.

The Company has historically recognized revenue from two primary sources, feasibility studies and government grants. Feasibility studies represent reports prepared to assist a customer in determining the viability of the NET Power Cycle for their specific use case. Government grants represent U.S. federal programs that incentivize the development of novel energy solutions. The Company has served as a sub-recipient to such government grants. Feasibility studies generally contain one performance obligation, the customer’s acceptance of the feasibility study report at the end of the review period. Government grants generally contain multiple performance obligations related to the incursion of costs associated with the development of in-scope activities that entitle the Company, as sub-recipient, to reimbursement from the primary grant recipient.

Fair Value - Certain assets and liabilities are carried at fair value in accordance with ASC Topic 820 – Fair Value Measurement. Fair value is defined as the price that would be received for an asset or paid to transfer a liability (i.e., the exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The guidance establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

•Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities;

•Level 2 - Significant other observable inputs other than Level 1 prices, such as quoted prices for similar, but not identical, assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data; and

•Level 3 - Significant unobservable inputs in which there is little or no market data available and requires the Company to develop its own assumptions that market participants would use in pricing an asset or liability.

Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of any input that is significant to the fair value measurement. The Company’s estimates of fair values are based upon assumptions believed to

12

Table of Contents

be reasonable, but which are uncertain and involve significant managerial judgments made by considering factors specific to the asset or liability. The determination of fair value requires more judgment to the extent the valuation is based on models or inputs that are less observable or unobservable in the market. Accordingly, the degree of judgment exercised by the Company in determining the fair value is greatest for instruments categorized as Level 3.

The Company’s recurring fair value measurements comprise the Private Placement Warrants, the Public Warrants, the Earnout Shares (as defined below) and short-term investments (Note I).

Cash - Cash consists of liquid deposits at banking institutions that are members of the Federal Deposit Insurance Corporation (“FDIC”) and the Financial Services Compensation Scheme (“FSCS”), the UK’s statutory compensation system for customers of authorized financial services firms. FDIC guidelines guarantee $250 per depositor, per insured bank and FSCS guidelines guarantee £85 per depositor per insured bank. As of September 30, 2023 (Successor) and December 31, 2022 (Predecessor), the Company possessed funds in excess of FDIC limits equal to $544,727 and $4,644 respectively. The carrying value of cash equals its fair value.

Warrants - The Company issued Public Warrants and Private Placement Warrants prior to the consummation of the Business Combination (Note C). The Company accounts for both the Public Warrants and Private Placement Warrants as liability-classified instruments based on an assessment of the Warrants’ specific terms and applicable authoritative guidance outlined in ASC Topic 480 - Distinguishing Liabilities from Equity ("ASC 480"), ASC Topic 815 - Derivatives and Hedging ("ASC 815") and relevant SEC reporting rules. The guidance considers whether the Warrants are freestanding financial instruments pursuant to ASC 480, whether the Warrants meet the definition of a liability pursuant to ASC 480, whether the Warrants meet all of the requirements for equity classification under ASC 815 and whether class of equity into which the Warrants settle possess substantive voting rights. This assessment is conducted at the time of the instruments’ issuance and at each subsequent quarterly period end date while the Warrants remain outstanding. In compliance with ASC 815, the Company accounts for the outstanding Warrants as a liability at fair value on the Consolidated Balance Sheets. The Warrants are subject to remeasurement at each Balance Sheets date with any change in the Warrants’ fair value recognized in the Company’s Consolidated Statements of Operations and Comprehensive Loss.

Short-Term Investments - The Company classifies investments with maturities greater than three months but less than one year as short-term investments. As of September 30, 2023, the Company's short-term investment balance consisted of a single six-month certificate of deposit custodied by a domestic banking institution.

Short-term investments are classified as held-to-maturity according to the guidance contained within ASC 326 - Financial Instruments - Credit Losses because the Company has the intent and ability to hold the certificate of deposit until maturity. Interest income generated from short-term investments is recorded as interest income in the Company's Consolidated Statements of Operations and Comprehensive Loss.

Tax Receivable Agreement Liability - As part of the Business Combinations (Note C), the Company entered into the TRA with certain OpCo unitholders that will represent approximately 75% of the calculated tax savings based on the portion of basis adjustments on exchanges of OpCo units and other carryforward attributes that are anticipated to be able to be utilized in future years. Such tax attributes include the existing tax basis of certain assets of OpCo and its consolidated subsidiaries; tax basis adjustments resulting from taxable exchanges of Class A OpCo Units; certain tax benefits realized by NET Power Inc. as a result of the Business Combination and tax deduction in respect of portions of certain TRA payments. All such payments made under the terms of the TRA are the obligations of NET Power Inc. and not of OpCo.

Reference Note O to review additional information about the TRA Liability.

Intangible Assets - The Company accounts for intangible assets, which consist of developed technology related to the NET Power Cycle, in accordance with ASC Topic 350 - Goodwill and Other Intangible Assets (“ASC 350”). The following table summarizes the estimated useful lives used to amortize definite lived intangible assets:

Intangible Asset Classification	Useful Life
Developed Technology	20

The weighted average amortization period for all intangible assets is 20 years.

Goodwill - The Company recognizes goodwill in accordance with ASC 350. Goodwill represents the excess costs of an acquired entity over the amounts assigned to assets acquired and liabilities assumed in a business combination. Goodwill is

13

Table of Contents

not amortized but is tested annually for impairment. During the June 8, 2023 through September 30, 2023 (Successor) period, the Company determined that no impairment charges for goodwill were required to be recognized.

Prepaid Expenses - Prepaid expenses consist of costs paid in advance for software and other subscriptions, patent renewal fees, general liability insurance and employee health insurance.

Property, Plant and Equipment - Property, plant and equipment are recorded at the historical cost to acquire the assets. The costs bases of property, plant and equipment to which the Company held title prior to the Business Combination completion (Note C) were stepped-up to their respective fair values on June 8, 2023 in accordance with the closure of the Business Combination. The Demonstration Plant's depreciable value consists of costs associated with the engineering, procurement, and construction of the facility.

Depreciation is calculated on the straight-line method over the estimated useful lives of the assets. Amounts capitalized to construction in progress are not depreciated until the underlying asset is placed into service. The following table summarizes the estimated useful lives used to depreciate property, plant and equipment and assets:

Asset Classification	Useful Life
Furniture and Equipment	4 – 7
Demonstration Plant	7
Construction in Progress	—

Impairment of Definite-Lived Assets - In accordance with ASC Topic 360 - Property, Plant and Equipment, tangible and intangible assets with finite useful lives are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets placed in service is measured by comparing the carrying amount of an asset or asset group to the future undiscounted cash flows expected to be generated by the asset or asset group. If such assets are considered to be impaired, impairment equals the amount by which the carrying amount of the assets exceeds the fair value of the assets. There were no impairment charges recorded during the June 8 through September 30, 2023 (Successor) period or during the year ended December 31, 2022 (Predecessor).

Lease Agreements – Lease agreements may fall within two categories according to ASC Topic 842 – Leases ("ASC 842"), operating leases or financing leases. Both operating and finance leases result in the recognition of lease liabilities and associated right-of-use assets that are valued at the net present value of the lease payments and recognized. The Company has elected the short-term lease exception and therefore only recognizes right-of-use assets and lease liabilities for leases with a term greater than one year. The lease term includes the committed lease term identified in the contract, taking into account renewal and termination options that management is reasonably certain to exercise. The discount rate used in the measurement of a right-to-use asset and lease liability is the rate implicit in the lease whenever that rate is readily determinable. If the rate implicit in the lease is not readily determinable, the Company uses its incremental borrowing rate as a proxy for the discount rate based on the term of the lease unless the implicit rate is available.

Asset Retirement Obligation – The Company recognizes liabilities and the corresponding assets for future obligations associated with the retirement of assets. The fair values of legal obligations to retire and remove long-lived assets are recorded in the period in which the obligation is incurred. Prior to the consummation of the Business Combination (Note C), asset retirement obligations were reflected in property, plant and equipment. In conjunction with the Business Combination, the Company re-measured its property, plant and equipment assets at their respective June 8, 2023 fair values, which resulted in the asset retirement obligation being removed from Property, plant and equipment on the Consolidated Balance Sheets. When an asset retirement obligation arises, the liabilities and corresponding assets are recorded at their present values using a discounted cash flow approach and the liabilities are accreted using the interest method. The asset retirement costs and corresponding liabilities that have been recorded to-date relate to the obligations of the land lease for the property underneath the Demonstration Plant at the end of the Demonstration Plant's estimated useful life.

The Company’s valuation of the asset retirement obligation related to the Demonstration Plant encompasses an estimate for the cost to restore the site as required by lease terms. The accretion expense generated by the Company’s asset retirement obligation liability is recognized ratably over the Demonstration Plant’s expected seven year useful life.

Net Loss per Unit - During the Predecessor Period, the Company computed basic net loss per unit by dividing the total net loss applicable to membership interest holders by the weighted average number of membership interests outstanding during the period. The Company computed diluted net loss per unit by dividing the net loss applicable to membership interest holders by the sum of the weighted-average number of membership interests outstanding during the period and the

14

Table of Contents

potentially dilutive effects of distribution units, profits interests and options to purchase membership interests. Such items were excluded if their effect was anti-dilutive. Since the impact of the distribution units, profits interests, and options to purchase membership interests were anti-dilutive during periods of net loss, there was no difference between the Company’s basic and diluted net loss per unit for the period from January 1, 2023 through June 7, 2023 (Predecessor) or the year ended December 31, 2022 (Predecessor).

Net Loss per Share - During the Successor Period, basic net loss per share is computed based on the weighted average number of shares of Class A Common Stock outstanding. Diluted net loss per share is computed based on the weighted average number of common shares outstanding, increased by the number of any additional shares that would have been outstanding had any potentially dilutive common shares been issued. For the purposes of the diluted earnings per share calculation, Warrants, Earnout Shares, restricted stock units and conversion of OpCo Units are excluded from the calculation for the period from June 8 through September 30, 2023 (Successor), as the inclusion would be anti-dilutive due to the losses reported in the year.

Equity Based Compensation – The Company applies ASC Topic 718 – Share-Based Payments (“ASC 718”) to account for its equity awards. Equity awards granted to employees include unvested Class A OpCo Units and a corresponding number of unvested shares of Class B Common Stock and RSU's that settle into shares of Class A Common Stock upon vesting. Generally, each award is subject to a service condition that requires a specific period of continued employment or service to the Company to elapse before the award fully vests. Certain awards also include performance conditions to vest fully. The Board’s Compensation Committee establishes these service and performance conditions.

The estimated fair value of NET Power, LLC membership units was determined by an independent, external valuation service provider at each equity grant date until the the Closing Date, upon which the Company became publicly traded. On the Closing Date, the Company fair valued the OpCo Units used to satisfy outstanding share-based awards at the fair value of the Company's Class A Common Stock.

In accordance with ASC 718, the Company recognizes expense related to equity awards for which vesting is considered probable. Forfeitures are recognized as they occur. For service-based awards, compensation cost is measured at fair value on the grant date and expensed ratably over the vesting term. For performance-based grants, the fair value is measured on the grant date and recognized as non-cash compensation expense, considering the probability of the targets being achieved. The Company recognizes compensation expense generated by all service-based awards on a straight-line basis over the underlying awards's vesting period.

Earnout Shares and Restricted Shares - As part of the Business Combination (Note C), 128,908,518 Class A OpCo Units and a corresponding number of shares of Class B Common Stock, 7,624,999 Class B OpCo Units and a corresponding number of shares of Class B Common Stock and 54,047,495 shares of Class A Common Stock owned by the Sponsor, the Sponsor's affiliates and private investors were subjected to certain vesting and transfer restrictions. Upon conversion of Class B OpCo Units to Class A OpCo Units (Note K), the 6,072,463 Class B OpCo Units subject to vesting and transfer restrictions became Class A OpCo Units.

Of the total shares subject to vesting and transfer restrictions, 986,775 Class A OpCo Units, all of which were formerly Class B OpCo Units, and a corresponding number of shares of Class B Common Stock vest in three equal tranches contingent upon the share price of the Class A Common Stock (the "Earnout Shares"). The first tranche vests if the closing price of the Class A Common Stock on the NYSE is greater than or equal to $12.00 for any 20 trading days within a consecutive 30-trading-day period beginning on or after June 23, 2023. The second tranche vests if the closing price of the Class A Common Stock on the NYSE is greater than or equal to $14.00 for any 20 trading days within a consecutive 30-trading-day period beginning on or after June 23, 2023. The third tranche vests if the closing price of the Class A Common Stock on the NYSE is greater than or equal to $16.00 for any 20 trading days within a consecutive 30-trading-day period beginning on or after June 23, 2023 and ending on the three-year anniversary of the Closing Date.

Of the OpCo Units subject to transfer restrictions, 44,544,551 Class A OpCo Units, of which 1,575,045 were formerly Class B OpCo Units, (the “Price-Based Lock-up Shares”) may not be transferred until after the three-year anniversary of the Closing Date; provided, however, that if the last sale price of the Class A Common Stock on the NYSE, for any 20 trading days within any 30 consecutive trading-day period commencing on or after June 23, 2023 exceeds (or, in the case of the 1,575,045 Class A OpCo Units that were formerly Class B OpCo Units, equals) (i) $12.00 per share, then one-third of the Price-Based Lock-up Shares will no longer be subject to such lock-up restrictions, (ii) $14.00 per share, then an additional one-third of the Price-Based Lock-up Shares will no longer be subject to such lock-up restrictions, and (iii) $16.00 per share, then all of the Price-Based Lock-up Shares will no longer be subject to such lock-up restrictions.

15

Table of Contents

The remaining 89,449,655 Class A OpCo Units, of which 3,510,643 were formerly Class B OpCo Units (the “Time-Based Lock-up Shares”) subject to transfer restrictions may not be transferred until after the one-year anniversary of the Closing Date; provided, however, that if the last sale price of the Class A Common Stock on the NYSE, for any 20 trading days within any 30 consecutive trading-day period commencing on or after December 8, 2023, exceeds (or in the case of the 3,510,643 Class A OpCo Units that were formerly Class B OpCo Units, equals) $12.00 per share, then the Time-Based Lock-up Shares will no longer be subject to such lock-up restrictions.

Unvested Earnout Shares are reported as liabilities within the Company’s Consolidated Balance Sheets. The liability classification reflects the Company’s evaluation of the Earnout Shares according to ASC 480’s and ASC 815’s standards. The Price Based Lockup Shares and the Time-Based Lockup Shares are included as equity within the Company's Consolidated Balance Sheets.

Non-Controlling Interest - Non-controlling interests (“NCI”) represent Legacy NET Power Holders partners’, sponsors' and certain strategic partners' respective ownership of OpCo. After the conversion of Class B OpCo Units to Class A OpCo Units, NCI is comprised exclusively of Class A OpCo Units (Note K). After evaluating Class A OpCo Unit redemption rights under ASC 480, the Company determined that Class A OpCo Units are subject to potential cash redemption that rests outside the Company's control. The Company has classified NCI as a component of mezzanine equity in consideration of this cash redemption feature and in accordance with ASC 810's guidance.

After considering the effects of consolidation, the Company owns 32.6% of OpCo and NCI holders own the residual 67.4%. The Company's net loss before income tax and its comprehensive loss in the Successor Period are reduced by the portions of net loss before income tax and comprehensive loss, respectively, that are attributable to non-controlling interests.

Research and Development Costs - The Company expenses costs related to operations and testing at the Demonstration Plant, as well as engineering and design costs related to development of the NET Power Cycle as incurred. These costs are included in Research and Development on the Consolidated Statements of Operations and Comprehensive Loss.

Related Parties –The Company applies ASC Topic 850 – Related Parties ("ASC 850") and prevailing SEC guidance to classify and report transactions with related parties.

The Company has entered into contractual relationships with several of its current shareholders and former members that qualify as related parties according to the aforementioned criteria. These relationships include loans from members and master service agreements (“MSA's”).

Income and Uncertain Taxes – The Company applies the guidance set forth in ASC Topic 740 – Income Taxes (“ASC 740”) to evaluate its tax positions. The Company evaluates the realizability of deferred tax assets on a quarterly basis and establishes a valuation allowance when it is more-likely-than-not that all or a portion of a deferred tax asset may not be realized. The Company calculates the provision for income taxes during interim periods by applying an estimate of the forecasted annual effective tax rate for the full fiscal year to ordinary income or loss (pretax income or loss excluding unusual or infrequently occurring discrete items) for the reporting period.

NET Power Inc. consolidates the financial results of OpCo in its consolidated financial statements. OpCo represents a pass-through entity for U.S. federal and most applicable state and local income tax purposes. As a pass-through entity for tax purposes, OpCo is not subject to U.S. federal and certain state and local income taxes. Any taxable income or loss generated by OpCo is passed through to its members, including NET Power Inc., which is taxed as a corporation that pays corporate federal, state and local taxes with respect to income allocated from OpCo based on its economic interest in OpCo.

NP Europe is subject to taxation pursuant to UK tax regulations. For the quarter ended September 30, 2023 (Successor) and the year ended December 31, 2022 (Predecessor), NP Europe incurred taxable losses, which may be used to offset future profits. The Company has established a valuation allowance against possible future tax benefits because the ability to recognize these benefits does not meet ASC 740's more-likely-than-not recognition threshold; therefore, no provision or asset for UK income taxes has been included in the consolidated financial statements.

Management evaluated the Company’s tax positions and concluded that the Company had taken no uncertain tax positions that require adjustment to comply with the applicable accounting guidance.

16

Table of Contents

NOTE C — Business Combination

RONI, a Cayman Islands exempted company, was organized as a blank check company formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses. On June 18, 2021, RONI completed its IPO, generating gross proceeds of approximately $345,000. The net proceeds from the IPO were subsequently placed in a trust account for the intended purpose of consummating a business combination.

On December 13, 2022, NET Power, LLC entered into a Business Combination Agreement with RONI, RONI Holdings, Buyer and Merger Sub. On the Closing Date, Merger Sub merged with and into NET Power, LLC, with NET Power, LLC continuing as the surviving entity, resulting in it becoming a majority-owned, direct subsidiary of Buyer. RONI OpCo renamed itself NET Power Operations LLC and RONI renamed itself NET Power Inc. upon completion of the Business Combination.

The Business Combination resulted in an umbrella partnership, C corporation or “Up-C” structure. Immediately prior to the execution of the Business Combination Agreement, RONI OpCo represented a VIE in accordance with ASC 810’s guidance; therefore, RONI represented the accounting acquirer within the Business Combination structure. The Company elected push-down accounting for the Business Combination and recorded the push-down entries at RONI OpCo.

As a result of the Business Combination, the Company's financial statement presentation distinguishes NET Power, LLC as the "Predecessor" through June 7, 2023. NET Power Inc. is the "Successor" for periods after the Closing Date. Revenue and earnings from the date of the Business Combination to period-end are shown as the "Successor" period on the Consolidated Statements of Operations and Comprehensive Loss. As a result of the application of the acquisition method of accounting in the Successor Period, the consolidated financial statements for the Successor Period are presented on a full step-up basis; therefore, Successor Period consolidated financial statements are not comparable to the consolidated financial statements of the Predecessor Period, which are not presented on the same full step-up basis.

The result of the Business Combination generated the following financial results:

•The Business Combination generated $121,883 of expenses, including $16,021 of acquirer expenses recorded “on-the-line” because they would not have been incurred had the Business Combination not closed.

•In contemplation of the Business Combination, the Company modified certain outstanding profits interests awards, a portion of which vested during the pre-combination period. The Company included $325 of previously vested, modified Profits Interests issued to the award recipient as consideration transferred to sellers.

•Certain outstanding Profits Interests, which were not modified in contemplation of the Business Combination, that vested during the pre-combination period and that were issued to recipients as part of the Business Combination were included in consideration transferred to sellers. The total fair value of previously vested, unmodified Profits Interests included in consideration transferred to sellers equaled $651.

•All outstanding NET Power, LLC member interests converted into 136,073,365 vested Class A OpCo Units and a corresponding number of vested shares of Class B Common Stock, 1,119,198 unvested Class A OpCo Units and 1,119,198 unvested shares of Class B Common Stock upon completion of the Business Combination.

•The Company registered and issued 67,352,271 shares of Class A Common Stock on the NYSE.

•The Company recorded 8,624,974 Public Warrants exercisable into 8,624,974 shares of Class A Common Stock at a price of $11.50 per share. The Company may redeem the Public Warrants for $0.01 if the last reported trading price of the Company's Class A Common Stock price equals or exceeds $18.00 per share for any 20 trading days within a 30-trading day period. Additionally, the Public Warrants may be redeemed if the last reported trading price of the Company's Class A Common Stock equals or exceeds $10.00 and is below $18.00 by paying a make-whole premium. The Public Warrants expire 5 years after the Closing Date.

•The Company recorded 10,900,000 Private Placement Warrants, which are exercisable for 10,900,000 shares of Class A Common Stock at a price of $11.50 per share. The Private Placement Warrants expire 5 years after the Closing Date. The Private Placement Warrants are exercisable on a cashless basis and are non-redeemable as long as they are held by the initial purchasers or their permitted transferees. The Private Placement Warrants and Class A Common Stock issuable upon exercise of the Private Placement Warrants are entitled to registration rights.

•The Company recorded $71,459 of deferred tax liabilities, which represent the difference between NET Power Inc.’s tax basis and its US GAAP basis in OpCo, with an offsetting entry to goodwill. The basis difference is primarily attributable to the Company's developed technology and its Demonstration Plant asset.

•The Company received $661,623 of cash from trust net of certain expenses paid on the Closing Date. During the period from July 1, 2023 through September 30, 2023 (Successor) this cash earned $10,800 in interest revenue, which is reported as interest revenue on the Consolidated Statements of Operations and Comprehensive Loss.

17

Table of Contents

The Business Combination was accounted for using the acquisition method of accounting. The fair value of the total purchase consideration transferred was $1,786,259. The following table summarizes the total consideration transferred in the Business Combination:

Consideration Transferred	Total
Pre-combination vesting of modified profits interests	$	325
Pre-combination vesting of unmodified profits interests	651
Consideration Transferred to Sellers	976
Class A OpCo Units - non-controlling interests	1,785,283
Fair value of total consideration transferred	$	1,786,259

The following table sets forth the fair value of the assets and liabilities assumed in connection with the Business Combination:

	Total
Assets Acquired
Current Assets
Cash	$	7,946
Prepaid expenses	637
Other current assets	30
Total Current Assets	8,613
Long Term Assets
Intangible assets, net	1,345,000
Property, plant and equipment	91,855
Right-of-use assets	940
Total Long Term Assets	1,437,795
Total Assets Acquired	$	1,446,408
Liabilities Assumed
Current Liabilities
Accounts payable	2,574
Accrued liabilities	7,370
Current lease liability	137
Other current liabilities	1
Total Current Liabilities	10,082
Long Term Liabilities
Deferred tax liability	71,459
Asset retirement obligation	1,967
Long term lease liability	594
Total Long Term Liabilities	74,020
Total Liabilities Assumed	84,102
Total identifiable net assets	1,362,306
Goodwill	423,953
Net assets acquired	$	1,786,259

The purchase price allocation is subject to change during the measurement period, which will expire one year from the acquisition date.

18

Table of Contents

Pro-Forma Information - The following table presents pro forma information as if the Business Combination occurred as of January 1, 2022. The pro forma information reflects adjustments for additional amortization resulting from the fair value re-measurement of assets acquired and liabilities assumed, for alignment of accounting policies, and transaction expenses as if the Business Combination occurred on January 1, 2022. The pro forma results do not include any anticipated cost synergies or other effects of the combined Company. Accordingly, pro forma amounts are not necessarily indicative of the results that actually would have occurred had the Business Combination been completed on the date indicated, nor are they indicative of the Company's future operating results.

	Three Months Ended				Nine Months Ended
	September 30, 2023		September 30, 2022		September 30, 2023		September 30, 2022
Pro forma revenue	$	125	$	208	$	175	$	574
Pro forma net loss	(91,966)		(28,964)		(266,123)		(87,558)
Pro forma net loss attributable to non-redeemable controlling interest	(29,981)		(9,442)		(86,756)		(28,544)
Pro forma net loss attributable to non-redeemable non-controlling interests	(61,985)		(19,522)		(179,367)		(59,014)

NOTE D — Intangible Assets

Goodwill - Goodwill represents the future economic benefits derived from the Company’s unique market position, the growth attributable to the NET Power Cycle and the Company's assembled workforce, none of which are individually and separately recognized as intangible assets. Goodwill is allocated to the Company's sole reportable segment and reporting unit.

The following table presents the Company's goodwill balance as of September 30, 2023 (Successor):

	Goodwill
Goodwill at June 30, 2023 (Successor)	$	433,736
Measurement Adjustments	(9,783)
Goodwill at September 30, 2023 (Successor)	$	423,953

Current period measurement adjustments of $9,783 reflect the effects of changes to deferred tax liability estimates calculated as part of the purchase price allocation that accompanied the Business Combination (Note C).

Definite Lived Intangible Assets - The following tables present the Company's definite lived intangible assets as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor) are as follows:

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Developed Technology, gross	$	1,345,000	$	604
Accumulated Amortization	(20,922)		(341)
Developed Technology, net	$	1,324,078	$	263

Amortization expense for the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through September 30, 2023 (Successor) was $10 and $20,922, respectively. Amortization expense for the three month and nine month periods ended September 30, 2022 (Predecessor) was $5 and $16, respectively. Periodic amortization expense excludes goodwill, which is not amortized. The Company does not own or control any intangible

19

Table of Contents

assets with indefinite useful lives except goodwill. The Company's goodwill is not tax deductible. The following table presents estimated amortization expense for future periods and future years ending December 31:

	Future Amortization Expense
2023	$	16,813
2024	67,250
2025	67,250
2026	67,250
2027	67,250
2028 and thereafter	1,038,265
Total	$	1,324,078

NOTE E – Property, Plant and Equipment

The following table summarizes the key classifications of property, plant and equipment as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor):

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Furniture and Equipment, gross	$	253	$	368
Accumulated Depreciation	(17)		(216)
Furniture and Equipment, net	236		152
Demonstration Plant, gross	89,240		128,013
Accumulated Depreciation	(3,955)		(58,570)
Demonstration Plant, net	85,285		69,443
Construction in Progress	6,237		—
Total Property, Plant and Equipment, net	$	91,758	$	69,595

Depreciation expense for the period from January 1, 2023 through June 7, 2023 (Predecessor), the period from June 8, 2023 through September 30, 2023 (Successor) and the period from July 1, 2023 through September 30, 2023 was $5,700, $3,972 and $3,173, respectively. Depreciation expense for the three month and nine month periods ended September 30, 2022 (Predecessor) was $3,266 and $9,797, respectively.

Asset Retirement Obligation - The following table disaggregates the contents of the Company's asset retirement obligation included in Property, Plant and equipment, net on the Consolidated Balance Sheets as of December 31, 2022 (Predecessor):

	December 31, 2022 (Predecessor)
Asset Retirement Obligation, gross	$	2,201
Accumulated Depreciation	(348)
Asset Retirement Obligation, net	$	1,853

20

Table of Contents

NOTE F — Accrued Liabilities

Accrued liabilities as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor) are as follows:

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Accrued Incentive Compensation	$	1,023	$	1,451
Accrued cash-based expense of Original JDA and Amended and Restated JDA	2,748		—
Accrued Legal Service Provider Fees	1,731		645
Other Accrued Liabilities	1,929		296
Total Accrued Liabilities	$	7,431	$	2,392

NOTE G — Trade Receivables and Allowance for Doubtful Accounts

Trade receivables, net as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor) comprise the following balances:

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Trade Receivables, gross	$	—	$	352
Allowance for Doubtful Accounts	—		—
Trade Receivables, net	$	—	$	352

During the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through September 30, 2023 (Successor), the Company recorded bad debt expense associated with its allowance for doubtful accounts equal to $352 and $0 within General and administrative on the Consolidated Statement of Operations and Comprehensive Loss, respectively. During the three month and nine month periods ended September 30, 2022 (Predecessor), the Company recorded bad debt expense associated with its allowance for doubtful accounts equal to $0 and $0 within General and administrative on the Consolidated Statement of Operations and Comprehensive Loss, respectively.

NOTE H — Related Party Transactions

Related Party Transactions - The Company had $288 and $178 in current liabilities payable to related parties as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor), respectively. These related party payables are unsecured and are due on demand.

The Company had $0 and $2,212 in long term liabilities payable to related parties as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor), respectively.

Share Purchase Option - One of the Company’s shareholders owned an option to purchase up to 711,111 membership interests from NET Power, LLC if NET Power, LLC met certain performance conditions, which it did not achieve prior to the close of the Business Combination. Immediately prior to the close of the Business Combination (Note C), the option holder received 247,655 NET Power, LLC membership interests worth approximately $79,054 in exchange for retiring the purchase option. The membership interests converted into 7,905,279 Class A OpCo Units and a corresponding quantity of shares of Class B Common Stock in conjunction with the Business Combination. The loss generated from the settlement of the share purchase option is recorded as Option settlement - related party expense on the Consolidated Statements of Operations and Comprehensive Loss.

MSA – A significant shareholder has provided the Company with marketing services, patent administration services and technology maintenance services related to the development of the NET Power Cycle. The total cost incurred for these services was $79 and $51 during the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through September 30, 2023 (Successor), respectively. The total cost incurred for these services was $47 and $183 during the three month and nine month periods ended September 30, 2022 (Predecessor), respectively. These totals are included in General and administrative - related party on the Consolidated Statements of Operations and Comprehensive Loss.

21

Table of Contents

Another shareholder supports the Company with regard to general business oversight and with the operation of the Demonstration Plant. The total cost incurred for these services was $530 and $433 during the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through September 30, 2023 (Successor), respectively. The total cost incurred for these services was $184 and $790 during the three month and nine month periods ended September 30, 2022 (Predecessor), respectively. These totals are reflected in Research and development - related party on the Consolidated Statements of Operations and Comprehensive Loss.

NOTE I – Fair Value Measurement

The following table presents information about the Company’s liabilities that are measured at fair value on a recurring basis as of September 30, 2023 (Successor) and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine each asset's and each liability's fair value:

Assets	Level 1		Level 2		Level 3		Total
Short-term Investments	$	—	$	100,000	$	—	$	100,000
Total	$	—	$	100,000	$	—	$	100,000
Liabilities	Level 1		Level 2		Level 3		Total
Public Warrants	$	37,420	$	—	$	—	$	37,420
Private Placement Warrants	—		—		103,114		103,114
Earnout Shares	—		—		4,546		4,546
Total	$	37,420	$	—	$	107,660	$	145,080

The following table presents information about the Company’s liabilities that were measured at fair value on a recurring basis as of December 31, 2022 (Predecessor) and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine each liability's fair value:

Liabilities	Level 1		Level 2		Level 3		Total
Option Liability	$	—	$	—	$	5,174	$	5,174
Total	$	—	$	—	$	5,174	$	5,174

The following table presents a reconciliation of the beginning and ending balances of recurring level 3 fair value measurements:

	July 1 – September 30, 2023 (Successor)		July 1 – September 30, 2022 (Predecessor)		June 8 – September 30, 2023 (Successor)		January 1 – June 7, 2023 (Predecessor)		January 1 - September 30, 2022 (Predecessor)
Balance of recurring level 3 liabilities at beginning of period	$	63,187	$	1,854	$	63,851	$	5,174	$	1,459
Total gains and losses during the period included in    Other Income (Expense)	52,352		—		51,688		—		395
Issuances	(7,879)		—		(7,879)		—		—
Payments	—		—		—		(5,174)		—
Transfers into level 3	—		—		—		—		—
Transfers out of level 3	—		—		—		—		—
Balance of recurring level 3 liabilities at end of period	$	107,660	$	1,854	$	107,660	$	—	$	1,854

Earnout Shares - The fair values for the Earnout Shares are estimated using a Monte Carlo simulation. The Monte Carlo simulation considers daily simulated stock prices as a proxy for the Company's daily volume-weighted average share price. The key inputs into the valuation of the Earnout Shares are an expected term of 3 years, a risk-free rate of 4.8% and estimated equity volatility of 62.5%. The estimated equity volatility assumption is based on a blended average of asset and equity volatility measurements of publicly traded companies within the Company's peer group.

Warrants - The Public Warrants are valued using their quoted and publicly available market prices. Since their fair value is predicated on quoted prices in an active market for identical instruments, the Public Warrants are considered to be Level 1 fair value instruments because their price is observable.

22

Table of Contents

The Company uses a Black-Scholes Merton Model to value the Private Placement Warrants. Key inputs into the Black-Scholes Merton Model include the Class A Common Stock closing price of $15.10 as of September 30, 2023 (Successor), the risk free rate of 4.5%, volatility of 64.0%, a term of 5 years and a strike price of $11.50 per share. The volatility assumption is based on a blended average of operating and equity volatility of publicly traded companies within the Company's peer group.The Private Placement Warrants are considered to be Level 3 fair value instruments because they are not traded on public markets; therefore, their price is not observable.

Short-term Investments - Short-term investments are valued at cost, which approximates fair value. Short-term investments are considered Level 2 fair value instruments because cost basis is not observable in a public market.

Option Liability - The Company’s option liability was issued in conjunction with member loans authorized on October 15, 2021. The loans were fully repaid on February 3, 2022. The interest expense related to these loans equaled $30 and $0 during the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through September 30, 2023 (Successor), respectively. These measurements were reported in Interest income (expense) on the Consolidated Statements of Operations and Comprehensive Loss. On January 11, 2023, an option holder exercised its option to purchase membership interests associated with the member loan agreement. On February 3, 2023, another option holder also exercised its option to purchase membership interests associated with the member loan agreement. The Company issued 5,824 and 28,764 membership interests to the two option holders, respectively, and received an aggregate of $5,836 from the exercise of the options. No loan options are currently outstanding.

NOTE J — Net Loss per Share and Net Loss per Unit

Successor Period – Basic net loss per share is computed based on the weighted average number of shares of Class A Common Stock outstanding. Diluted net income per share is computed based on the weighted average number of shares of Class A Common Stock outstanding, increased by the number of any additional shares of Class A Common Stock that would have been outstanding had any potentially dilutive shares of Class A Common Stock been issued and reduced by the number of shares of Class A Common Stock the Company could have repurchased from the proceeds from issuance of the potentially dilutive shares.

For the purposes of the diluted earnings per share calculation, Warrants, Earnout Shares, BHES Bonus Shares (as defiend below) (Note L), unvested Class A OpCo Units and the potential conversion of vested OpCo Units are excluded from the net loss per share calculation for the period from June 8, 2023 through September 30, 2023 (Successor) because their inclusion would be anti-dilutive due to the losses reported in the Successor Period. Additionally, Earnout Shares and BHES Bonus Shares are excluded from the net loss calculation because the contingencies that would allow for those Earnout Shares to vest into OpCo Units have not yet been met. Based on the amounts outstanding at September 30, 2023 (Successor), the Company excluded the following financial instruments from the computation of diluted net loss per unit because their inclusion would be anti-dilutive due to the losses reported in the Successor Period:

Anti-Dilutive Instrument	September 30, 2023 (Successor)
Public Warrants	8,622,235
Private Placement Warrants	10,900,000
Earnout Shares	328,925
BHES Bonus Shares	2,068,416
Unvested Class A OpCo Units	972,522
Vested Class A OpCo Units	140,747,943
Unvested RSU's	440,423
Total	164,080,464

Only shares of Class A Common Stock participate in the Company’s undistributed earnings. As such, the Company’s undistributed earnings are allocated entirely to the Class A Common Stock based on the weighted-average number of shares of Class A Common Stock outstanding for the period from June 8, 2023 through September 30, 2023 (Successor).

23

Table of Contents

The following table sets forth the computation of the Company’s basic and diluted net loss per share for the period from June 8, 2023 through September 30, 2023 (Successor):

	Class A
Numerator
Net loss	$	(202,551)
Net loss attributable to shareholders	$	(65,564)
Denominator
Weighted-average number shares outstanding, basic and diluted	68,644,032
Net loss per share attributable to shareholders, basic and diluted	$	(0.96)

Predecessor Period – Basic net loss per unit is computed based on the weighted average number of membership interests outstanding. Diluted net loss per unit is computed based on the weighted average number of membership interests outstanding, increased by the number of any additional units that would have been outstanding had any potentially dilutive membership interests been issued and decreased by the number of membership interests the Company could have repurchased from the proceeds from issuance of the potentially dilutive membership interests.

As of September 30, 2022 (Predecessor), the Company’s potentially dilutive securities were profits interests, member loan share options and share options. Based on the amounts outstanding at September 30, 2022 (Predecessor), the Company excluded the following potential membership interests from the computation of diluted net loss per unit because their inclusion would be anti-dilutive due to the losses reported in the Predecessor Period:

Anti-Dilutive Instrument	September 30, 2022 (Predecessor)
Profits Interests	450,013
Member Loan Share Options	34,588
Occidental Petroleum Share Options	711,111
Total	1,195,712

The following table sets forth the computation of the Company’s basic and diluted net loss per unit for the three month and nine month periods ended September 30, 2022 (Predecessor) and for the period from January 1, 2023 through June 7, 2023 (Predecessor), respectively:

	Period from July 1 - September 30, 2023 (Successor)		Three Months Ended September 30, 2022 (Predecessor)		Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)		Nine Months Ended September 30, 2022 (Predecessor)
Numerator
Net loss	$	(30,564)	$	(12,220)	$	(65,564)	$	(34,176)	$	(37,335)
Net loss attributable to membership interest holders	$	(30,564)	$	(12,220)	$	(65,564)	$	(34,176)	$	(37,335)
Denominator
Weighted-average number membership interests outstanding, basic and diluted	68,966,972		1,143,430		68,644,032		3,766,871		2,838,388
Net loss per unit attributable to membership interest holders, basic and diluted	$	(0.44)	$	(10.69)	$	(0.96)	$	(9.07)	$	(13.15)

24

Table of Contents

NOTE K – Shareholders’ Equity, Non-Controlling Interest and Members’ Equity

Successor Period - The Company’s equity consists of a total of 831,000,000 authorized shares across all classes of capital stock, which the Company has the authority to issue. The 831,000,000 authorized shares consist of 1,000,000 authorized shares of Preferred Stock with a par value of $0.0001 per share, 520,000,000 authorized shares of Class A Common Stock with a par value of $0.0001 per share, and 310,000,000 shares of Class B Common Stock with a par value of $0.0001 per share.

As of September 30, 2023 (Successor), the Company had no outstanding shares of Preferred Stock, 71,014,190 outstanding shares of Class A Common Stock, and 141,529,513 outstanding shares of Class B Common Stock.

The table below demonstrates the calculation of net loss before income tax attributable to redeemable non-controlling interest holders for the July 1, 2023 through September 30, 2023 (Successor) period and the June 8, 2023 through September 30, 2023 (Successor) period:

	Period from July 1 - September 30, 2023 (Successor)			Period from June 8 - September 30, 2023 (Successor)
Net Loss before Income Tax	$	(91,976)		$	(203,232)
Redeemable non-controlling interest percentage - Class A OpCo Units	67.4		%	67.3		%
Net Loss before Income Tax attributable to Class A OpCo Units	$	(61,402)		$	(136,987)

On August 16, 2023, pursuant to the OpCo limited liability company agreement, all Class B OpCo Units converted into Class A OpCo Units on a one-for-one basis due to the exercise on such date by an OpCo Unitholder of its Class B OpCo Unit conversion right, which allowed the holder to convert its own Class B OpCo Units into Class A OpCo Units on a one-for-one basis.

During the three months ended September 30, 2023, the Company's Class A Common Stock achieved the $12.00 per share and $14.00 per share prices necessary to cause two-thirds of the Earnout Shares to vest and to remove the lock-up provision from two-thirds of the Price-Based Lock-Up Shares. As of September 30, 2023, 328,925 Class A OpCo units and a corresponding number of shares of Class B Common Stock included in the Earnout Shares remain unvested. Additionally, as of September 30, 2023, 14,848,184 Price-Based Lockup Shares remain restricted.

As of September 30, 2023, redeemable non-controlling interests are comprised of 140,228,066 vested Class A OpCo Units, of which 6,967,050 units were formerly vested Class B OpCo Units. Class A OpCo Units are exchangeable for shares of Class A Common Stock or redeemable for cash. Additionally, the Company holds a call right that enables it to redeem Class A OpCo Units for shares of Class A Common Stock or cash once the unit holder has elected to redeem the equity instrument.

Predecessor Period – The Company’s equity in the Predecessor Period comprised a single class of membership interests. The Company’s members’ equity as of September 30, 2022 (Predecessor) included 4,987,845 authorized membership interests, of which 3,718,931 were issued and outstanding.

Due to the absence of an active market for the Company’s membership interests, the Company utilized methodologies in accordance with the framework of the American Institute of Certified Public Accountants Technical Practice Aid - Valuation of Privately-Held Company Equity Securities Issued as Compensation to estimate the fair value of its membership interests. The estimated fair value of the membership interests was determined at each grant date based upon a variety of factors, including price of equity issuances by the Company, the Company’s financial position, historical financial performance, the Company’s developed, external market conditions affecting any trends within the industry and the likelihood of achieving a liquidity event.

NOTE L — Share-Based Payments

OpCo Unit Awards - As of September 30, 2023 (Successor), there was $3,300 of unrecognized share-based compensation expense related to unvested Class A OpCo Units granted under previous programs, which the Company expects to recognize over a weighted average period of 3 years.

25

Table of Contents

As of December 31, 2022 (Predecessor), there was $9,312 of unrecognized share-based compensation expense related to unvested equity awards granted under previous programs, which the Company expects to recognize over a weighted average period of 1 year.

The following table presents a summary of employee equity awards comprised of Class A OpCo Units and a corresponding quantity of shares of Class B Common Stock outstanding, granted, forfeited, vested on an accelerated basis and redeemed during the current year-to-date:

	Quantity		Calculated Value
	Period from June 8 - September 30, 2023 (Successor)	Period from January 1 - June 7, 2023 (Predecessor)	Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)
Unvested, beginning of period	1,895,122	226,494	$	4.95	$	63.25
Granted	—	—	$	—	$	—
Forfeited	(324,568)	—	$	5.66	$	—
Vested	—	(107,418)	$	—	$	63.18
Accelerated	(598,032)	—	$	4.32	$	—
Unvested, end of period	972,522	119,076	$	4.45	$	63.32

Omnibus Incentive Plan and RSU's - In conjunction with the Business Combination, the Company's board of directors and RONI's shareholders approved the 2023 Omnibus Incentive Plan. The 2023 Omnibus Incentive Plan initially reserves 20,468,545 shares of Class A Common Stock for issuance as equity awards. The quantity of shares of Class A Common Stock reserved for grant under the 2023 Omnibus Incentive Plan will be subject to an annual increase on the first day of each calendar year beginning January 1, 2024, and ending and including January 1, 2033, equal to the lesser of (i) 5% of the aggregate number of shares outstanding on December 31 of the immediately preceding calendar year and (ii) any such smaller number of shares as is determined by the Board.

During the period from July 1, 2023 through September 30, 2023 (Successor), the Company authorized the issuance of 440,424 RSU's to its executive employees, non-executive employees and non-employee independent directors under the terms of the Omnibus Incentive Plan. As of September 30, 2023 (Successor), there was $5,491 of unrecognized share-based compensation expense related to unvested RSU's, which the Company expects to recognize over a weighted average period of 3 years

The following table presents a summary of RSU's outstanding, granted, forfeited, vested on an accelerated basis and redeemed during the current year-to-date:

	Quantity		Fair Value
	Period from June 8 - September 30, 2023 (Successor)	Period from January 1 - June 7, 2023 (Predecessor)	Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)
Unvested, beginning of period	—	—	$	—	$	—
Granted	440,424	—	$	13.43	$	—
Forfeited	—	—	$	—	$	—
Vested	—	—	$	—	$	—
Accelerated	—	—	$	—	$	—
Unvested, end of period	440,424	—	$	13.43	$	—

Awards granted to employees and the majority of executives cliff-vest at the end of the grant's three-year anniversary date. Awards granted to independent directors and certain executives use a graded vesting schedule over the three-year period that begins on each award's grant date.

26

Table of Contents

Replacement Awards - Pursuant to the Business Combination Agreement (Note C), the Company agreed to amend the settlement provisions of certain unvested, outstanding profits interests previously issued by NET Power, LLC (the “Replacement Awards”). Unvested Replacement Awards that would have originally settled into NET Power, LLC membership interests will now settle into Class A OpCo Units and a corresponding number of shares of Class B Common Stock. The number of Class A OpCo Units and shares of Class B Common Stock into which the Replacement Awards will settle is calculated so that the settlement value approximates the value of NET Power, LLC membership interests into which the profits interests would have settled. The Replacement Awards will continue to vest over the original applicable service periods and are subject to the same performance conditions as the profits interests.

Accelerated Vesting & Forfeiture of Certain Profits Interests - Also pursuant to the Business Combination Agreement, the Company agreed to accelerate the vesting of certain unvested profits interests upon completion of the Business Combination. The Business Combination resulted in the immediate vesting of 30,000 profits interests, which equated to 451,356 Class A OpCo Units and a corresponding number of shares of Class B Common Stock, that generated $1,624 in compensation cost, which was directly attributed to the transaction on June 8, 2023. The expense generated by the accelerated vesting of certain profits interests is recorded in General and administrative - related party within the June 8 through September 30, 2023 (Successor) period of the Consolidated Statements of Operations and Comprehensive Loss.

Additionally, the Business Combination resulted in the forfeiture of 30,000 unvested profits interests, which equated to 324,625 Class A OpCo Units and a corresponding number of shares of Class B Common Stock. This forfeiture did not affect the compensation expense recorded in the Consolidated Statements of Operations and Comprehensive Loss because the awards were unvested at the time of forfeiture.

JDA - The following table presents the quantity and value of equity issued to BHES as payment for costs incurred pursuant to the Original JDA and the Amended & Restated JDA (Note N). The portion of Original JDA and Amended and Restated JDA costs that the Company pays with Class A OpCo Units and shares of Class B Common Stock is recorded within additional paid in capital on the Consolidated Balance Sheets and the Consolidated Statement of Shareholders' Equity and Non-Controlling Interest. The Equivalent Value per Unit displays the discounted price per membership interest or per share stipulated in the Original JDA and the Amended and Restated JDA. The Total Fair Value columns display the fair value of shares distributed as payment for services rendered by BHES under the terms of the Original JDA and the Amended and Restated JDA.

	Quantity		Total Fair Value
	Period from June 8 - September 30, 2023 (Successor)	Period from January 1 - June 7, 2023 (Predecessor)	Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)		Equivalent Value per Unit or per Share
Membership Interests	—	9,210	$	—	$	1,943	$	168.75
Class A OpCo Units	542,324	296,160	3,585		1,958		$	5.29
Class B Common Stock	542,324	296,160	—		—		$	—
Total			$	3,585	$	3,901

Shares used as payment under the terms of the Amended and Restated JDA are issued at a discount expected to cause a total loss of approximately $17,500 to the Company. The Company has incurred inception-to-date losses of $2,053 related to such issuances.

BHES may earn additional shares under the terms of the Amended and Restated JDA ("BHES Bonus Shares") if it meets certain contractually stipulated project milestones related to the development of the Demonstration Plant. The Company determined that BHES's achievement of each of these milestones is probable in accordance with ASC 718's guidance; therefore, the Company recognizes the compensation cost associated with milestone share-based payments ratably over the expected service period. The following table disaggregates the variable compensation payable to BHES should it meet its milestone objectives:

	Performance Period End Date	Compensation Cost Incurred To Date		Remaining Compensation Cost		Total Compensation Cost
JDA - variable share-based payments	January, 2027	$	20,557	$	6,788	$	27,345

27

Table of Contents

Additionally, BHES received 47,000 membership interests that converted into 1,500,265 Class A OpCo Units and a corresponding number of shares of Class B Common Stock in conjunction with the consummation of the Business Combination (Note C).

Reference Note N for additional quantitative disclosures related to the Original JDA and the Amended and Restated JDA.

NOTE M — Leases

Office Lease - On June 6, 2022, the Company entered into an office space lease agreement (the "Measurement Building Lease"), which became effective on November 1, 2022 and used an original lease term of 60 months from the signing date. The lease is classified as an operating lease and the lease liability was calculated using an incremental borrowing rate of 8.0%. On August 11, 2023, the Company agreed to terminate the Measurement Building Lease, effective October 6, 2023, and entered into a new office lease agreement (the "Roney St. Lease"). The Roney St. Lease began on October 6, 2023 and lasts for a term of 62 months from the commencement date. The simultaneous termination of the Measurement Building Lease and execution of the Roney St. Lease represents a single transaction accounted for as a modification of the Measurement Building Lease under the requirements of ASC 842. As such, the Company re-measured the lease liabilities and right of use asset associated with the Measurement Building Lease and recognized those balances over the amended, remaining lease term.

As of September 30, 2023, the Company had $3 in lease liabilities and $3 in right-of-use assets attributable to the Measurement Building Lease on its Consolidated Balance Sheets. After the Measurement Building Lease modification, the Company does not expect to incur lease payments related to that agreement during future reporting periods.

Land Lease - The Company leases the land under the Demonstration Plant. The lease expires on the earlier of (i) July 1, 2025 or (ii) the termination of the Company’s oxygen supply agreement with the lessor, which also serves as a supplier to the Company. Lease payments for the land equal one dollar per year.

In conjunction with the Business Combination Agreement (Note C), the Company revalued its land lease at its fair value, which involved a comparison of the land lease's terms against comparable market lease terms. Based on this comparison, the Company recorded $210 of right-of-use assets on the Consolidated Balance Sheets related to the favorable terms of its Demonstration Plant land lease.

NOTE N — Commitments and Contingencies

Litigation - In conjunction with the Business Combination (Note C), the Company entered into a settlement agreement with a RONI shareholder related to certain disclosures made in the registration statement filed by RONI for the Business Combination. The settlement amount did not have a material effect on the Consolidated Balance Sheets of the Company.

Asset Retirement Obligation - The Company’s valuation of the asset retirement obligation related to the Demonstration Plant encompasses an estimate for the cost to restore the site as required by lease terms.

The following table reconciles the beginning value of the Company's asset retirement obligation liability to its ending balance for each period presented in the Consolidated Statements of Operations and Comprehensive Loss:

	Period from July 1 – September 30, 2023 (Successor)		Three Months Ended September 30, 2022 (Predecessor)		Period from June 8 – September 30, 2023 (Successor)		Period from January 1 – June 7, 2023 (Predecessor)		Nine Months Ended September 30, 2022 (Predecessor)
Asset retirement obligation, beginning of period	$	1,977	$	2,308	$	1,977	$	2,416	$	—
Obligation incurred	—		—		—		—		2,201
Periodic accretion expense	41		54		41		102		161
Asset retirement obligation, end of period	$	2,018	$	2,362	$	2,018	$	2,518	$	2,362

Unconditional Purchase Obligations - The Company has committed to purchase industrial components for installation at its Demonstration Plant. The Company pays for these components in installments related to contractual milestones specified by the counterparty. In accordance with ASC Topic 440 - Commitments ("ASC 440"), the Company does not recognize the commitment on its Consolidated Balance Sheets. Upon invoicing, the Company reclassifies current period

28

Table of Contents

installment payments to accounts payable and proportionally increases its construction in progress account. The Company expects to recognize the gross value of its existing asset purchase commitments during the current fiscal year.

The following table presents the Company’s material, unrecognized purchase obligations:

Commitment	Consideration Type	Gross Commitment		Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)		Prior Predecessor Periods		Remaining Commitment
Asset Purchase Commitment	Cash	$	4,700	$	—	$	1,168	$	—	$	3,532
Original JDA and Amended and Restated JDA	Cash	70,000		2,867		3,121		2,211		61,801
Original JDA and Amended and Restated JDA	Share-Based	70,000		3,585		3,902		2,765		59,748
	Total	$	144,700	$	6,452	$	8,191	$	4,976	$	125,081

JDA - On February 3, 2022, the Company entered into the Original JDA with affiliates of Baker Hughes Energy Services LLC, which is a shareholder (collectively “BHES”). The Original JDA's counterparties subsequently amended the agreement's terms on June 30, 2022 and December 13, 2022 (the "Amended and Restated JDA"). The Amended and Restated JDA represents a contract that engages BHES to invest in, develop and deploy the NET Power Cycle in collaboration with the Company. The Amended and Restated JDA entitles BHES to payments of cash and equity in exchange for services related to the development and commercialization of the technology. Expenses incurred under the terms of the Amended and Restated JDA are invoiced quarterly. The Company records the measurement of services provided by BHES within Research and development on the Consolidated Statement of Operations and Comprehensive Loss.

The Company does not recognize the commitment related to the Amended and Restated JDA on its balance sheet in accordance with ASC 440's guidance. Upon receipt of an invoice, the Company accrues for the current period billing in Accounts payable and records the related operating expense and compensation expense. The Company expects to recognize the gross value of its commitments under the Amended and Restated JDA by January, 2027.

Prior to the Business Combination, the Company used membership interests to compensate BHES for its services under the Amended and Restated JDA (Note L). After the Business Combination, the Company uses Class A OpCo Units and corresponding quantities of Class B Common Stock to compensate BHES for its services under the Amended and Restated JDA (Note L).

The following table presents the costs associated with the JDA's:

	Period from				Period from
	July 1 – September 30, 2023 (Successor)		July 1 – September 30, 2022 (Predecessor)		June 8 – September 30, 2023 (Successor)		January 1 – June 7, 2023 (Predecessor)		January 1 – September 30, 2022 (Predecessor)
Cash expense	$	2,748	$	578	$	2,867	$	3,121	$	1,256
Plus: Membership Interests Issued	—		723		—		3,902		6,934
Plus: Class A OpCo Units Issued	3,436		—		3,585		—		—
Plus: BHES Bonus Share expense	819		2,688		6,010		4,690		1,570
Total research and development attributable to JDA	$	7,003	$	3,989	$	12,462	$	11,713	$	9,760

Prior to June 8, 2023 (Successor), the Company recorded costs incurred under the Amended and Restated JDA within Research and development - related party on the Consolidated Statement of Operations and Comprehensive Loss because an affiliate of BHES served on the Company's Board of Directors. Subsequent to the Business Combination, neither BHES nor its affiliates occupy seats on the Company's Board of Directors; therefore, BHES no longer qualifies as a related party.

NOTE O — Income Taxes

Prior to the Closing Date, NET Power, LLC represented a pass-through entity for state and federal income tax consideration, which passed through its income or loss to its partners; therefore, it did not record income tax (benefit)

29

Table of Contents

expense. The following table presents the Company’s Income tax (benefit) expense and the effective income tax rate during the period from June 8 through September 30, 2023 (Successor):

	June 8 - September 30, 2023 (Successor)
Income tax expense (benefit)	$	(681)
Effective tax rate	0.3		%

The provision for income taxes differs from the amount of income tax computed by applying the U.S. statutory federal tax rate of 21.0% to the loss before income taxes due to income (loss) from non-taxable pass-through entities related to non-controlling interests, non-deductible expenses, outside basis adjustments and the valuation allowance placed against deferred tax assets.

Tax Receivable Agreement - As of September 30, 2023 (Successor), the Company recorded a liability of $9,376 related to its projected obligations under the TRA, which is recorded as TRA Liability in the Company’s Consolidated Balance Sheets. This obligation arose because of qualifying exchanges of Class A OpCo Units that occurred during the period from July 1, 2023 through September 30, 2023 (Successor).

NOTE P — Subsequent Events

On October 6, 2023, the Company formally relocated to the office space governed by the Roney St. Lease. As of October 6, 2023, the lease liability affiliated with the Roney St. Lease equaled $2,168 and the right of use asset affiliated with the Roney St. Lease equaled $2,144. Future minimum lease expenses attributable to the Roney St. Lease are expected to total $2,623 over the lease term.

30

Table of Contents

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations (Dollars in thousands, except share and unit amounts, unless otherwise noted)

The following discussion of our financial condition and results of operations should be read in conjunction with the financial statements and related notes included elsewhere in this Report and NET Power LLC’s audited consolidated financial statements as of and for the years ended December 31, 2022 and the related notes thereto, included in Registration Statement. Certain information included in this discussion contains forward-looking statements that involve numerous risks and uncertainties. Our actual results may differ materially from those projected or implied by the forward-looking statements. Forward-looking statements are based on current expectations and assumptions and currently available data and are neither predictions nor guarantees of future events or performance. You should not place undue reliance on forward-looking statements, which speak only as of the date hereof. See “Cautionary Note Regarding Forward-Looking Statements.”

Unless the context otherwise requires, all references in this section to “NET Power,” “we,” “us,” or “our” and the “Company” refer to the business of NET Power and its subsidiaries. Additional terms used herein are defined in the section entitled “Certain Defined Terms” and elsewhere in this Report.

Overview

We are a clean energy technology company that has developed a unique power generation system (the “NET Power Cycle”) that produces clean, reliable, and low-cost electricity from natural gas while capturing virtually all atmospheric emissions. The NET Power Cycle is designed to inherently capture carbon dioxide (CO2) and eliminate air pollutants such as sulfur oxides (SOX), nitrogen oxides (NOX), and particulates. The NET Power Cycle was first demonstrated at our 50 MWth Demonstration Plant in La Porte, Texas, which broke ground in 2016 and began testing in 2018. We conducted three testing campaigns over three years and synchronized to the Texas grid in the fall of 2021. Through these tests, we achieved technology validation, reached critical operational milestones, and accumulated over 1,500 hours of total facility runtime as of November 2023. Over the next several years, the Company plans to conduct additional testing and validation campaigns at its Demonstration Plant and construct its first utility-scale plant.

We plan to license our technology through offering plant designs ranging from industrial-scale configurations between 25-115 MW net electric output to utility-scale units of approximately 300 MW net electric output capacity. Our first generation utility-scale design (Gen1U) will be a 300 MWe Class power plant, targeting a CO2 capture rate of 97% or greater. Early Gen1U deployments are focused on ensuring a clean and reliable system. Based on our work to date, we expect these early projects to target a net efficiency of approximately 45%. Incorporating the lessons learned from early plants’ operations, we target to deliver later Gen1U plants with net efficiency of approximately 50%. We intend to deploy our technology in the U.S. and around the world by leveraging experience gained from our La Porte Demonstration Plant as well as from the expertise of our strategic owners, including Occidental Petroleum Corporation (“OXY”), through OLCV Net Power, LLC, BHES, an affiliate of Baker Hughes Company, Constellation and NPEH, LLC, which is controlled by 8 Rivers, a company controlled by SK Inc.

Our potential customers include electric utilities, oil and gas companies, technology companies, and industrial facilities, both in domestic and international markets. We have engaged in active dialogue with potential customers in each of these industries. We expect that our primary revenues will be derived from license and royalty fees from our customers who will develop, own, and construct NET Power plants around the world. We expect to also provide technical support services to NET Power Plant developers and operators.

The Business Combination

On December 13, 2022, NET Power LLC entered into the Business Combination Agreement RONI, RONI OpCo, Buyer and Merger Sub. Pursuant to the Business Combination Agreement, Merger Sub merged with and into NET Power LLC with NET Power LLC surviving the merger as a wholly controlled subsidiary of Buyer. Upon the consummation of the Business Combination on June 8, 2023, RONI was renamed NET Power Inc.

Pursuant to the Business Combination Agreement, the aggregate merger consideration payable upon closing of the Business Combination to Legacy NET Power Holders consisted of 136,073,365 vested Class A OpCo Units and a corresponding number of vested shares of Class B Common Stock, 1,119,198 unvested Class A OpCo Units and 1,119,198 unvested shares of Class B Common Stock. Following the Closing, NET Power Inc. retained its umbrella partnership, C corporation or “Up-C” structure, whereby all of the equity interests in NET Power, LLC are held by OpCo, and NET Power Inc.’s only assets are its equity interests in OpCo.

In accordance with ASC 810, NET Power Operations LLC is considered a variable interest entity with NET Power Inc. serving as its primary beneficiary. NET Power Inc. was determined to be the primary beneficiary of NET Power LLC through being the sole managing member of OpCo, with the power to control the most significant activities of NET Power LLC, while also having an economic interest that provides it with the ability to participate significantly in NET Power

31

Table of Contents

LLC’s benefits and losses. As a result, NET Power LLC is treated as the “acquired” company for financial reporting purposes. Accordingly, for accounting purposes, the Business Combination represents an acquisition of a business and NET Power LLC’s identifiable assets acquired, liabilities assumed, and any non-controlling interests will be measured at their acquisition date fair value.

As a result of the Business Combination, NET Power Inc. became a publicly traded company with Class A Common Stock and Public Warrants trading on the NYSE, which has necessitated the hiring of additional personnel and the implementation of procedures and processes to address public company regulatory requirements and customary practices. We have incurred, and expect to continue to incur, material additional annual expenses as a public company for, among other things, directors’ and officers’ liability insurance, director fees, and additional internal and external accounting, legal, and administrative resources, including increased personnel costs, audit and other professional service fees.

Key Factors Affecting Our Prospects and Future Results

We believe that our performance and future success depend on a number of factors that present significant opportunities for us but also pose risks and challenges, including, but not limited to, cost over-runs in the testing and operation of the Demonstration Plant, technical problems with the NET Power Cycle, potential supply chain issues, and development of competing clean-energy technology sooner or at a lesser cost than the NET Power Cycle. Potential supply chain issues related to the manufacturing and transportation of key equipment have not yet had a material impact on our results of operations or capital resources, but continued material disruption in the supply chain may, in the future, lead to a delay in our commercialization efforts, which could impact our results of operations.

Commencing Commercial Operations

Over the next several years, the Company plans to conduct additional research and testing campaigns at its Demonstration Plant and construct its first utility-scale plant. NET Power expects to purchase initial long-lead materials for the first utility-scale plant in 2024 and targets initial power generation between the second half of 2027 and the first half of 2028. We expect that the 300 MWe Class plant will be a NET Power-led consortium project located at an OXY-hosted site in the Permian Basin of West Texas. We expect that the project will fully integrate power production with transportation and underground storage of carbon dioxide. We are focused on delivering a project that will catalyze future adoption for utility-scale customers.

Major remaining development activities relating to completing construction of our first utility-scale plant are similar to the activities we previously undertook to design, build, and commission the La Porte, Texas Demonstration Plant. These activities include but are not limited to: finalizing a Siting Study, initiating all permitting required, conducting a Front End Engineering Design (FEED) study, originating all required supply and off-take contracts, structuring the project to attract any required third party equity and debt financing and achieving final investment decision (FID), initiating the Engineer, Procurement and Construction (EPC) process, and constructing and commissioning the facility.

Key Components of Results of Operations

We are a development stage company and our historical results may not be indicative of our future results. Accordingly, the drivers of our future financial results, as well as the components of such results, may not be comparable to our historical or future results of operations.

Revenue

We have not generated material revenue to date. We have historically generated revenue through various contracts with potential future license customers for access to testing results, other data and feasibility studies. We have also generated revenue from our role as a sub-recipient of a Department of Energy grant to conduct syngas testing at our La Porte, Texas Demonstration Plant.

Cost of Revenue

Cost of revenue includes primarily the cost of subcontractor labor, as well as supplies and materials directly associated with our role as a grant subrecipient. These costs were submitted to the primary Department of Energy grant recipient for direct reimbursement.

Gross Profit

Our gross profit represents revenues less our total costs of revenue.

Operating Expenses

Operating expenses consist of general and administrative expenses, sales and marketing expenses, research and development expenses, as well as depreciation and amortization expenses. Personnel-related costs are the most significant component of our operating expenses and include salaries, benefits and stock-based compensation expenses.

32

Table of Contents

We expect to continue to invest substantial resources to support our growth and anticipate that each of the following categories of operating expenses will increase in absolute dollar amounts for the foreseeable future.

General and Administrative

General and administrative expenses consist primarily of personnel-related expenses associated with our general and administrative organization, professional fees for legal, accounting, and other consulting services, as well as other costs including bad debt expense. We have incurred and we expect to continue to incur additional general and administrative expenses as a result of operating as a public company, including expenses related to compliance with the rules and regulations of the SEC and stock exchange listing standards, additional insurance expenses (including directors’ and officers’ insurance), investor relations activities and other administrative and professional services. We have increased and we expect to further increase the size of the general and administrative function to support the growth of our business. However, we anticipate general and administrative expenses to decrease as a percentage of revenue over the long term.

Sales and Marketing

Our sales and marketing expenses consist primarily of personnel-related costs directly associated with our sales and marketing activities. We have not incurred significant sales and marketing expenses to date. We intend to make significant investments in our sales and marketing organization in the future to drive revenue once commercial activities commence. As a result, we expect our sales and marketing expenses to increase in the future as we approach commencing commercial operations.

Research and Development

Our research and development ("R&D") expenses consist primarily of labor expenses and fees paid to third parties working on and testing specific aspects of our technology, including testing at our Demonstration Plant in La Porte, Texas, and development activities under the Original JDA and the Amended and Restated JDA. R&D costs have been expensed as incurred. We expect R&D expenses to grow as we continue to develop our technology.

Project Development

Project development expenses consist of labor expenses and fees paid to third parties developing commercial scale projects. Costs currently relate primarily to the development of our first utility-scale plant, but are not limited to a single project or site. We expect these costs to increase as we progress with our initial utility-scale plant, and as additional projects are initiated.

Option Settlement

Option settlement expense is composed of a one-time cost related to issuance of equity in conjunction with the Business Combination Agreement.

Depreciation, Amortization and Accretion

Our depreciation and amortization expenses have previously consisted primarily of depreciation on our Demonstration Plant, with minimal cost associated with amortization of a small intangibles balance. As a result of the Business Combination, we now have a significant intangible balance for developed technology, which will result in commensurate amortization expenses going forward. We expect future depreciation and amortization to increase slightly as we continue to invest in our Demonstration Plant testing facility. Our accretion expense in prior periods was related to the asset retirement obligation at the Demonstration Plant; however this asset was marked to fair value at the close of the Business Combination and therefore will result in no further accretion.

Other Income (expense)

Other income (expense) consists mainly of interest income, interest expense, fair value adjustments and other expenses.

Results of Operations

Comparison of the Three Months Ended September 30, 2023 and 2022 (In thousands)

The following table sets forth our condensed results of operations data for the periods presented:

33

Table of Contents

	Period from				$ Change		% Change
	July 1 – September 30, 2023 (Successor)		July 1 – September 30, 2022 (Predecessor)
Revenue
Revenue	$	—	$	141	$	(141)	(100.0)	%
Cost of revenue	3		49		46		(93.9)	%
Gross Profit (Loss)	(3)		92		(95)		(103.3)	%
Operating Expenses
General and administration	8,096		4,122		3,974		96.4	%
Sales and marketing	931		136		795		584.6	%
Research and development	9,004		4,763		4,241		89.0	%
Project development	582		—		582		n/a
Depreciation, amortization and accretion	20,052		3,325		16,727		503.1	%
Total Operating Expenses	38,665		12,346		26,319		213.2	%
Operating Loss	(38,668)		(12,254)		(26,414)		215.6	%
Other Income (Expense)
Interest income (expense)	8,675		—		8,675		n/a
Other income (expense)	(61,983)		34		(62,017)		(182402.9)	%
Net Other Income (Expense)	(53,308)		34		(53,342)		156888.2	%
Net Loss before Income Tax	(91,976)		(12,220)		(79,756)		652.7	%
Income tax expense (benefit)	(10)		—		(10)		n/a
Net Loss after Income Tax	(91,966)		(12,220)
Other Comprehensive Loss
Foreign currency translation gain (loss)	1		(5)		6		120.0	%
Comprehensive Loss	(91,965)		(12,225)		(79,750)		652.4	%
Comprehensive Loss attributable to non-controlling interests	(61,402)		—		(136,987)		—	%
Comprehensive Loss attributable to NET Power Inc.	$	(30,563)	$	(12,220)	$	57,231	(468.3)	%

Revenue

Revenue decreased by $141, or 100.0%, for the three months ended September 30, 2023, as compared to $141 for the three months ended September 30, 2022. Revenue during these two periods was not significant, and the decrease is attributable to normal fluctuation.

Cost of Revenue

Cost of revenue decreased by $46, or 93.9%, for the three months ended September 30, 2023, as compared to $49 for the three months ended September 30, 2022. This decrease was primarily attributable to a decrease in U.S. Department of Energy Syngas testing activities at the La Porte Demonstration Plant, which had only minimal activity in 2022, and had no activity in 2023.

General and Administrative

General and administrative expenses increased by $3,974, or 96.4%, for the three months ended September 30, 2023, as compared to $4,122 for the three months ended September 30, 2022. This increase was primarily attributable to overall increases in corporate activity, including staffing and equity-based compensation as well as costs associated with the administrative requirements of a newly public company.

Sales and Marketing

Sales and marketing expenses increased by $795, or 584.6%, for the three months ended September 30, 2023, as compared to $136 for the three months ended September 30, 2022. This increase was primarily attributable to increased engagement of external consultants to support increased marketing activities as well as engagement of commercial staff.

Research and Development

34

Table of Contents

Research and development increased by $4,241, or 89.0%, for the three months ended September 30, 2023, as compared to $4,763 for the three months ended September 30, 2022. This increase was primarily due to the increase of development activities under the Amended and Restated JDA.

Project Development

Project development increased by $582 for the three months ended September 30, 2023, as compared to the three months ended September 30, 2022. This increase was due to the initiation of activities related to development of a utility-scale facility.

Depreciation and Amortization

Depreciation expense increased by $16,727, for the three months ended September 30, 2023, as compared to $3,325 for the three months ended September 30, 2022. A portion of this increase is attributable to the change in fixed asset fair value related to purchase accounting, however the majority is due to the amortization of the intangible asset for developed technology, also recorded as a result of the purchase accounting associated with the close of the Business Combination.

Interest Income (Expense) and Other Income (Expense)

Interest income (expense) increased by $8,675 for the three months ended September 30, 2023, as compared to $0 for the three months ended September 30, 2022 as a result of interest earned on cash from trust.

Other income (expense) decreased by $62,017 for the three months ended September 30, 2023, predominately due to the change in the Private Placement Warrants' fair value.

Comparison of the Nine Months Ended September 30, 2023 and 2022 (In thousands)

The following table sets forth our condensed results of operations data for the periods presented:

35

Table of Contents

	Period from						$ Change		% Change
	June 8 – September 30, 2023 (Successor)		January 1 – June 7, 2023 (Predecessor)		January 1 – September 30, 2022 (Predecessor)
Revenue
Revenue	$	—	$	175	$	574	$	(399)	(69.5)	%
Cost of revenue	3		3		268		(262)		(97.8)	%
Gross Profit (Loss)	(3)		172		306		(137)		(44.8)	%
Operating Expenses
General and administration	32,408		12,131		12,914		31,625		244.9	%
Sales and marketing	1,087		869		504		1,452		288.1	%
Research and development	14,834		14,319		12,814		16,339		127.5	%
Project development	698		1,191		—		1,889		n/a
Option settlement	79,054		—		—		79,054		n/a
Depreciation, amortization and accretion	24,978		5,812		9,974		20,816		208.7	%
Total Operating Expenses	153,059		34,322		36,206		151,175		417.5	%
Operating Loss	(153,062)		(34,150)		(35,900)		(151,312)		421.5	%
Other Income (Expense)
Interest income (expense)	10,800		4		(1,470)		12,274		835.0	%
Other income (expense)	(60,970)		(30)		35		(61,035)		(174385.7)	%
Net Other Income (Expense)	(50,170)		(26)		(1,435)		(48,761)		(3398.0)	%
Net Loss before Income Tax	(203,232)		(34,176)		(37,335)		(200,073)		535.9	%
Income tax expense (benefit)	(681)		—		—		(681)		n/a
Net Loss after Income Tax	(202,551)		(34,176)		(37,335)		(199,392)		534.1	%
Other Comprehensive Loss
Foreign currency translation gain (loss)	—		—		(5)		5		(100.0)	%
Total Other Comprehensive Loss	—		—		(5)		5		(100.0)	%
Comprehensive Loss	(202,551)		(34,176)		(37,340)		(199,387)		534.0	%
Comprehensive Loss attributable to non-controlling interests	(136,987)		—		—		136,987		n/a
Comprehensive Loss attributable to NET Power Inc.	$	(65,564)	$	(34,176)	$	(37,340)	$	(199,387)	534.0	%

Revenue

Revenue decreased by $399, or 69.5%, for the nine months ended September 30, 2023, as compared to $574 for the nine months ended September 30, 2022. Revenue during these two periods was not significant, and the decrease is attributable to normal fluctuation.

Cost of Revenue

Cost of revenue decreased by $262, or 97.8%, for the nine months ended September 30, 2023, as compared to $268 for the nine months ended September 30, 2022. This decrease was primarily attributable to a decrease in DOE Syngas testing activities at the La Porte Demonstration Plant, which formally paused in late 2021, and had only minimal activity in 2022.

General and Administrative

General and administrative expenses increased by $31,625, or 244.9%, for the nine months ended September 30, 2023, as compared to $12,914 for the nine months ended September 30, 2022. This increase was partially attributable to overall increases in corporate activity, including staffing and equity-based compensation. However the majority of the increase is composed of costs associated with the close of the Business Combination and subsequent public company status.

Sales and Marketing

Sales and marketing expenses increased by $1,452, or 288.1%, for the nine months ended September 30, 2023, as compared to $504 for the nine months ended September 30, 2022. This increase was primarily attributable to increased engagement of external consultants to support increased marketing activities.

36

Table of Contents

Research and Development

Research and development increased by $16,339, or 127.5%, for the nine months ended September 30, 2023, as compared to $12,814 for the nine months ended September 30, 2022. This increase was primarily due to the commencement of development activities under the Original JDA and the Amended and Restated JDA.

Project Development

Project development increased by $1,889 for the nine months ended September 30, 2023, as compared to the nine months ended September 30, 2022. This increase was due to the initiation of activities related to development of a utility-scale facility.

Option Settlement

Option Settlement expense increased by $79,054 for the nine months ended September 30, 2023, as compared to the nine months ended September 30, 2022. This increase was due to a one-time cost for settlement of an option agreement in association with the close of the Business Combination.

Depreciation, Amortization and Accretion

Depreciation expense increased by $20,816, or 208.7%, for the nine months ended September 30, 2023, as compared to $9,974 for the nine months ended September 30, 2022. A portion of this increase is attributable to the change in fixed asset fair value related to purchase accounting, however the majority is due to the amortization of the intangible asset for developed technology, also recorded as a result of the purchase accounting associated with the close of the Business Combination.

Interest Income (Expense) and Other Income (Expense)

Interest income (expense) increased by $12,274 for the nine months ended September 30, 2023, largely as a result of interest earned on cash from trust. Prior expense balance was attributable to expensing of the loan discount associated with the option liability relating to the member loans, which occurred in late 2021 and early 2022, as well as adjustment of the option liability to fair market value.

Other income (expense) increased by $61,035 nine months ended September 30, 2023, predominately due to the change in the Private Placement Warrants' fair value.

Liquidity and Capital Resources

Overview

We have not initiated commercial operations and have incurred losses since inception. We expect to continue to have losses for the remainder of 2023 and beyond. We measure liquidity in terms of our ability to fund the cash requirements of our R&D activities and our near-term business operations, including our contractual obligations and other commitments. Our current liquidity needs primarily involve R&D activities for the ongoing development of our technology.

As of September 30, 2023, we had an accumulated deficit of $89,361. As we continue to incur losses, achieving profitability is dependent upon the successful development and commercialization of our technology, and achieving a level of revenues adequate to support our cost structure. We will continue to need to raise additional capital until we achieve sustained profitability.

We had $545,248 and $5,164 in cash as of September 30, 2023 and December 31, 2022, respectively. Additionally, as of September 30, 2023 and December 31, 2022 we had $100,000 and $0, respectively, of short-term investments comprised of a single six-month certificate of deposit custodied by a domestic banking institution. We also had total liabilities of $229,492 and $13,735 as of September 30, 2023 and December 31, 2022, respectively, with the latter including a $5,174 option liability described below. As a result of the Business Combination, we received gross proceeds of approximately $675 million, consisting of approximately $135 million from RONI’s trust account and approximately $540 million in from strategic and financial investors in the PIPE Financing. We believe that these proceeds should be sufficient to reach commercialization of our technology, but certain costs are not reasonably estimable at this time and we may require additional funding.

Member Loans and Member Loan Share Options

On October 15, 2021, the NET Power, LLC board of directors approved a resolution to fund continued operations through term loans not to exceed $10,000 in total, with an interest rate of 9.25%. As of December 31, 2021, we had received loan funds from equity members totaling $8,000, which were due within six months and secured by our assets. An additional $2 million was received in January 2022. Each round of funding was also associated with options to purchase shares allocated based on member funding in excess of the pro rata loan total requested. 34,588 options were authorized as of December 31, 2022 at an exercise price of $168.75 per share and a fair value of $149.59 per share (total liability of $5,174). These

37

Table of Contents

options become exercisable for one year from loan repayment, which occurred on February 3, 2022. As of December 31, 2022, all member loans were repaid, and no related options had been exercised. For the year ended December 31, 2022, $1,358 of accretion was recorded as interest expense related to the member loans that we repaid. Our option liability was issued in conjunction with the member loans on October 15, 2021. The option liability represents a liability on the balance sheet classified as a Level 3 fair value measurement.

On January 11, 2023, OXY exercised its option to purchase shares associated with the member loan agreement. On February 3, 2023, Constellation Energy also exercised its option to purchase shares associated with the member loan agreement. NET Power, LLC issued 5,824 and 28,764 member interests to Occidental and Constellation Energy Generation, respectively, and received an aggregate of $5,837 from the exercise of the options. Such issuance resulted in Occidental and Constellation Energy Generation receiving 185,905 and 918,162 shares of Class A OpCo Units and a corresponding number of shares of Class B Common Stock), respectively, upon consummation of the Business Combination. No member loan share options are currently outstanding.

Sales of Equity Securities

Although we do not currently intend to do so, we may seek to raise additional capital through the sale of equity securities. Sales of a substantial number of shares of Class A Common Stock in the public market, including resales by our stockholders, could occur at any time. Such sales, or the perception in the market that such sales could occur, could result in a significant decline in the public trading price of the Class A Common Stock. Such a decline could adversely affect our ability to sell equity securities or the price at which we are able to sell equity securities and generally make it more difficult for us to raise additional capital through the sale of equity securities. See “Risk Factors — Risks Related to Ownership of the Offered Securities — Future sales, or the perception of future sales, by the Company or its stockholders in the public market could cause the market price for the Class A Common Stock to decline” in the Registration Statement.

Cash Flow Summary

The following table shows our cash flows from operating activities, investing activities and financing activities for the presented periods:

	Period from
(in thousands)	June 8 – September 30, 2023 (Successor)		January 1 - June 7, 2023 (Predecessor)		January 1 – September 30, 2022 (Predecessor)
Net cash provided by (used in)
Operating activities	$	(35,373)	$	(10,623)	$	(12,631)
Investing activities	$	(95,928)	$	(2,431)	$	—
Financing activities	$	319,529	$	15,836	$	21,466

Operating Activities

Our cash flows used in operating activities to date have been primarily comprised of payroll, material and supplies, facilities expense, and professional services related to research and development and general and administrative activities, including expenses associated with achieving and maintaining our public company status. As we continue to increase hiring to accelerate our engineering efforts ahead of having an operational plant, we expect our cash used in operating activities to increase significantly before we start to generate any material cash flows from our operations. Cash used by operating activities increased by $33,365 during the nine months ended September 30, 2023 from $12,631 in the nine months ended September 30, 2022.

Investing Activities

During the nine months ended September 30, 2023, cash flows used in investing activities increased by $98,359 as compared to the nine months ended September 30, 2022. The cash used in investing activities in the nine months ended September 30, 2023 primarily reflects cash used to purchase an interest-bearing, short-term certificate of deposit. Additionally, there continues to be cash used for equipment and equipment upgrades, which is partially offset by cash acquired as part of the Business Combination.

Financing Activities

Cash provided by financing activities in the nine months ended September 30, 2023 increased by $313,899 as compared to September 30, 2022. Cash provided by financing activities in the successor period consists primarily of proceeds from the PIPE Financing, less transaction expenses and shareholder redemptions. The Predecessor Periods also reflect cash received from the exercise of loan options in early 2023 and BHES’ investment in Old NET Power on February 3, 2022, as well as $2,000 in member loans received in January 2022, and subsequent repayment of all $10,000 in outstanding member loans in February 2022.

38

Table of Contents

Commitments and Contractual Obligations

Leases

As of September 30, 2023 and December 31, 2022, there were two active leases in place. The most recent, a five-year office lease agreement was signed on June 6, 2022 and took effect on November 1, 2022. Future minimum lease payments under the lease are approximately zero dollars. As of September 30, 2023 and December 31, 2022, we had $3 and $786, respectively, in lease liabilities and $181 and $784, respectively, in right of use assets on our consolidated balance sheet, in accordance with ASC 842.

We also hold a lease for the approximately 218,900 square feet of land under the Demonstration Plant in La Porte, Texas from Air Liquide Large Industries U.S. LP (“Air Liquide”) at a rate of one dollar per year. The lease expires on the earlier of (i) July 1, 2025 and (ii) the termination of our oxygen supply agreement with Air Liquide, pursuant to which Air Liquide supplies oxygen for our use at the Demonstration Plant. The term of the oxygen supply agreement is perpetual but may be terminated by us or by Air Liquide upon 30 days’ written notice. The underlying lease requires the removal of all equipment and the obligation to restore the land to post-clearing grade level, which has resulted in the recognition of an asset retirement obligation liability of $2,018 and $2,416 as of September 30, 2023 and December 31, 2022, respectively.

We lease our primary office space in Durham, NC. During August, 2023, we agreed with our landlord to terminate this office space agreement ahead of its scheduled term and enter into a lease for a new office space, also located in Durham, NC. We accounted for the early termination of the existing commercial lease and the execution of the new commercial lease as a modification of the original office lease, which resulted in the re-measurement of the original lease over its amended term. As of September 30, 2023, we recorded a lease liability of $3 and a ROU asset of $181 related to the original commercial lease. The new commercial lease arrangement will result in a new lease liability of $2,168 and a new ROU asset of $2,144.

On October 6, 2023, the Company formally relocated to the office space governed by the new lease arrangement. As of October 6, 2023, future minimum lease payments attributable to the new lease arrangement are expected to equal $2,623.

Joint Development Agreement

As of September 30, 2023 and December 31, 2022, we have committed to funding a portion of the remaining development costs incurred under the Amended and Restated JDA through a combination of cash and equity. The Amended and Restated JDA’s total value equals $140,000. As of September 30, 2023, we recognized approximately $8,199 of inception-to-date cash expenses and approximately $10,252 of inception-to-date share-based expenses related to the Amended and Restated JDA.

Off-Balance Sheet Arrangements

As of September 30, 2023 and December 31, 2022, we have not engaged in any off-balance sheet arrangements, as defined in the rules and regulations of the SEC.

Capital Commitments

As of September 30, 2023, we have committed to purchase certain components of industrial machinery from a supplier for use at our La Porte Demonstration Plant. The total commitment, which was initially unrecognized on our balance sheet, totaled $4,700. We recognize portions of the commitment on our balance sheet as portions become payable per contract milestones. We recognized $1,168 of this commitment on our balance sheet related to milestone billings under the terms of the commitment within the current period.

Critical Accounting Policies and Estimates

Our financial statements have been prepared in accordance with U.S. GAAP. Preparation of the financial statements requires our management to make a number of judgments, estimates and assumptions relating to the reported amount of expenses, assets and liabilities and the disclosure of contingent assets and liabilities. We consider an accounting judgment, estimate or assumption to be critical when (1) the estimate or assumption is complex in nature or requires a high degree of judgment and (2) the use of different judgments, estimates and assumptions could have a material impact on our financial statements. Our significant accounting policies are described in our financial statements included elsewhere in this Report. Additional information about our critical accounting policies follows:

Business Combinations

We account for business acquisitions in accordance with ASC 805. We measure the cost of an acquisition as the aggregate of the acquisition date fair values of the assets acquired and liabilities assumed and equity instruments issued. Transaction costs directly attributable to the acquisition are expensed as incurred. We record goodwill for the excess of (i) the total costs of acquisition, fair value of any non-controlling interests and acquisition date fair value of any previously held equity interest in the acquired business over (ii) the fair value of the identifiable net assets of the acquired business.

39

Table of Contents

The acquisition method of accounting requires us to exercise judgment and make estimates and assumptions based on available information regarding the fair values of the elements of a business combination as of the date of acquisition, including the fair values of identifiable intangible assets. We must also refine these estimates over a one-year measurement period, to reflect any new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date. If we are required to retroactively adjust provisional amounts that we have recorded for the fair value of assets and liabilities in connection with an acquisition, these adjustments could materially impact our results of operations and financial position. Estimates and assumptions that we must make in estimating the fair value of acquired developed technology, user lists and other identifiable intangible assets include future cash flows that we expect to generate from the acquired assets. If the subsequent actual results and updated projections of the underlying business activity change compared with the assumptions and projections used to develop these values, we could record impairment charges. In addition, we have estimated the economic lives of certain acquired assets and these lives are used to calculate depreciation and amortization expense applicable to those assets. If our estimates of the economic lives change, depreciation or amortization expenses could be accelerated or decelerated, which could materially impact our results of operations.

Goodwill

We recognize goodwill in accordance with ASC 350. Goodwill represents the excess cost of an acquired entity over the fair value amounts assigned to assets acquired and liabilities assumed in a business combination. Goodwill is not amortized.

Goodwill is tested for impairment annually and is tested for impairment between annual tests whenever events or changes in circumstances indicate that the carrying value of goodwill may not be recoverable. Among the factors that could trigger an impairment review are current operating results that do not align with our annual plan or historical performance; changes in our strategic plans or the use of our assets; restructuring charges or other changes in our business segments; competitive pressures and changes in the general economy or in the markets in which we operate; and a significant decline in our stock price and our market capitalization relative to our net book value. An impairment charge for goodwill is recognized only when the estimated fair value of a reporting unit, including goodwill, is less than its carrying amount. As of September 30, 2023, no impairment charges for goodwill have been recognized.

Evaluating the recoverability of goodwill requires judgments and assumptions regarding future trends and events. As a result, both the precision and reliability of our estimates are subject to uncertainty. Among the factors that we consider in our qualitative assessment are general economic conditions and the competition present within our business environment; actual and projected reporting unit financial performance; forward-looking business measurements; and external market assessments.

Earnout Shares and Warrants

The fair values of the Earnout Shares liability and Warrant liability were determined using Monte Carlo simulations that have various significant unobservable inputs. The assumptions used could have a material impact on the valuation of these liabilities, and include our best estimate of expected volatility and expected holding periods. Changes in the estimated fair values of these liabilities may have material impacts on our results of operations in any given period, as any increases in these liabilities have a corresponding negative impact on our U.S. GAAP results of operations in the period in which the changes occur.

Income Taxes

As managing member of OpCo, NET Power Inc. consolidates the financial results of OpCo in its consolidated financial statements. OpCo represents a pass-through entity for U.S. federal and most applicable state and local income tax purposes. As a pass-through entity for tax purposes, OpCo is not subject to U.S. federal and certain state and local income taxes. Any taxable income or loss generated by OpCo is passed through to its members, including NET Power Inc., which is taxed as a corporation that pays corporate federal, state and local taxes with respect to income allocated from OpCo based on its economic interest in OpCo.

Equity-Based Compensation and Fair Value of Shares

We recognize the cost of equity-based awards granted to our employees and directors based on the estimated grant-date fair value of the awards. Cost is recognized on a straight-line basis over the service period, which is generally the vesting period of the award. We determine the fair value of equity awards using the Black-Scholes option pricing model, which is impacted by the following assumptions:

•Expected Term — We use the expected term to liquidity, which is generally to vesting period of the award.

•Expected Volatility — Volatility is based on a benchmark of comparable companies.

•Expected Dividend Yield — The dividend rate used is zero as we have never paid any cash dividends and we do not anticipate doing so in the foreseeable future.

40

Table of Contents

•Risk-Free Interest Rate — The interest rates used are based on the implied yield available on U.S. Treasury zero-coupon issues with an equivalent remaining term equal to the expected life of the award.

Prior to the Business Combination, there was no public market for our equity instruments and, as a result, the estimated fair value of our equity has historically been determined by the NET Power LLC board of directors as of the grant date with input from management, considering our most recently available third-party valuations of equity and the NET Power LLC board of directors’ assessment of additional objective and subjective factors that the NET Power LLC board believed were relevant and which may have changed from the date of the most recent valuation through the date of grant. We engaged an independent third-party valuation specialist to perform contemporaneous valuations of our equity. The valuations were performed in accordance with the guidance outlined in the American Institute of Certified Public Accountants ("AICPA"), Practice Aid, Valuation of Privately-Held Company Equity Securities Issued as Compensation. The independent third-party valuation specialist considered all objective and subjective factors that it believed to be relevant for each valuation conducted in accordance with AICPA’s Practice Aid, including our best estimate of our business condition, prospects, and operating performance at each valuation date. Other significant factors included:

•Our results of operations and financial position;

•Our stage of development and business strategy and the material risks related to our business and industry;

•The lack of liquidity of our equity;

•The valuation of publicly traded peer companies; and

•The likelihood of achieving a liquidity event for the holders of our ownership shares and equity awards, given prevailing market conditions

Emerging Growth Company Accounting Election

Section 102(b)(1) of the JOBS Act exempts emerging growth companies ("EGC's") from being required to comply with new or revised financial accounting standards until private companies are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect not to take advantage of the extended transition period and comply with the requirements that apply to non-EGC's, and any such election to not take advantage of the extended transition period is irrevocable. Following the consummation of the Business Combination, we expect to be an EGC at least through the end of 2023 and will have the benefit of the extended transition period. We intend to take advantage of the benefits of this extended transition period.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We are a smaller reporting company as defined by Rule 12b-2 of the Exchange Act and are not required to provide the information otherwise required under this item.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of our disclosure controls and procedures, as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as of the end of the fiscal quarter ended September 30, 2023. Based on this evaluation, our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures were effective as of September 30, 2023.

Disclosure controls and procedures are designed to ensure that information required to be disclosed by us in our Exchange Act reports is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There was no change in our internal control over financial reporting that occurred during the fiscal quarter ended September 30, 2023 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

41

Table of Contents

Part II - Other Information

Item 1. Legal Proceedings

From time to time, the Company is party to certain legal actions and claims arising in the ordinary course of business. While the outcome of these events cannot be predicted with certainty, management does not currently expect these matters to have a materially adverse effect on the financial position or results of operations of the Company.

Item 1A. Risk Factors

As a smaller reporting company, we are not required to provide the information called for by this Item. However, for a discussion of the material risks, uncertainties and other factors that could have a material effect on us, please refer to the risk factors disclosed in the Registration Statement under “Risk Factors.”

Item 2. Unregistered Sales of Equity Securities, Use of Proceeds and Issuer Purchases of Equity Securities

Unregistered Sales of Equity Securities

On July 28, 2023, the Company issued 308,607 shares of Class B Common stock and OpCo issued 308,607 Class A units to BHES as payment for costs incurred pursuant to the Amended & Restated JDA during the second quarter of 2023. The issuances by the Company and OpCo were exempt from registration under the Securities Act by virtue of Section 4(a)(2) of the Securities Act. These transactions did not involve any public offering, any underwriters, any underwriting discounts or commissions, or any general solicitation or advertising.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

Item 6. Exhibits

42

Table of Contents

Exhibit Number	Description
2.1+	Business Combination Agreement, dated as of December 13, 2022, by and among Rice Acquisition Corp. II, Rice Acquisition Holdings II LLC, Topo Buyer Co, LLC, Topo Merger Sub, LLC and NET Power, LLC (incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed with the SEC on December 14, 2022).
2.2	First Amendment to the Business Combination Agreement, dated as of April 23, 2023, by and among Topo Buyer Co, LLC and NET Power, LLC (incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed with the SEC on April 24, 2023).
3.1	Certificate of Incorporation of NET Power Inc. (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed with the SEC on June 14, 2023).
3.2	Bylaws of NET Power Inc. (incorporated by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K filed with the SEC on June 14, 2023).
10.1	NET Power Inc. Executive Severance Plan (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed with the SEC on August 25, 2023)
10.2	Form of Executive Plan Participation Agreement (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K filed with the SEC on August 25, 2023)
31.1	Certification of Chief Executive Officer (Principal Executive Officer) Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer (Principal Financial Officer) Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Chief Executive Officer (Principal Executive Officer) Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of Chief Financial Officer (Principal Financial Officer) Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	Inline XBRL Instance Document.
101.SCH	Inline XBRL Taxonomy Extension Schema Document.
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document.
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document.
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).
Certain schedules or similar attachments to this exhibit have been omitted pursuant to Item 601(a)(5) of Regulation S-K. The Company agrees to provide a copy of any omitted schedule or similar attachment to the SEC upon request

43

Table of Contents

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: November 14, 2023                        NET Power Inc.     

                                By:      /s/ Akash Patel        

                                Name:     Akash Patel

                                Title:    Chief Financial Officer

(Principal Financial Officer)

44

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO RULES 13a-14(a) AND 15d-14(a)

UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Daniel J. Rice IV, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarter ended September 30, 2023 of NET Power Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s

fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 14, 2023                By:    /s/ Daniel J. Rice IV    

                                 Daniel J. Rice IV

                                 Chief Executive Officer

                                 (Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO RULES 13a-14(a) AND 15d-14(a)

UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Akash Patel, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarter ended September 30, 2023 of NET Power Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s

fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 14, 2023                By:    /s/ Akash Patel            

                                 Akash Patel

                                 Chief Financial Officer

                                 (Principal Executive Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of NET Power Inc. (the “Company”) on Form 10-Q for the quarter ended September 30, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Daniel J. Rice IV, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

(1)    the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)    the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 14, 2023                By:    /s/ Daniel J. Rice IV    

                                 Daniel J. Rice IV

                                 Chief Executive Officer

                                 (Principal Executive Officer)

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of NET Power Inc. (the “Company”) on Form 10-Q for the quarter ended September 30, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Akash Patel, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

(1)    the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)    the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 14, 2023                By:    /s/ Akash Patel            

                                 Akash Patel

                                 Chief Financial Officer

                                 (Principal Financial Officer)

XML

Cover - shares	9 Months Ended
	Sep. 30, 2023	Nov. 10, 2023
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-40503
Entity Registrant Name	NET Power Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	98-1580612
Entity Address, Address Line One	320 Roney St.
Entity Address, Address Line Two	Suite 200
Entity Address, City or Town	Durham
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27701
City Area Code	(919)
Local Phone Number	287-4750
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Central Index Key	0001845437
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Former Address
Document Information [Line Items]
Entity Address, Address Line One	404 Hunt St.
Entity Address, Address Line Two	Suite 410
Entity Address, City or Town	Durham
Entity Address, State or Province	NC
Class A Common Stock
Document Information [Line Items]
Title of 12(b) Security	Class A Common Stock
Trading Symbol	NPWR
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		71,026,680
Warrants, each exercisable for one share of Class A Common Stock at a price of $11.50
Document Information [Line Items]
Title of 12(b) Security	Warrants, each exercisable for one share ofClass A Common Stock at a price of $11.50
Trading Symbol	NPWR WS
Security Exchange Name	NYSE
Class B ordinary shares
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		142,038,655

XML

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash	$ 545,248	$ 5,164
Short term investments	100,000	0
Trade receivables, net	0	352
Interest receivable	2,903	0
Prepaid expenses	2,662	184
Other current assets	40	1,795
Total Current Assets	650,853	7,495
Long Term Assets
Intangible assets, net	1,324,078	263
Goodwill	423,953	0
Property, plant and equipment, net	91,758	69,595
Lease right-of-use asset	181	784
Total Long Term Assets	1,839,970	70,642
Total Assets	2,490,823	78,137
Current Liabilities
Accounts payable	1,687	577
Accrued liabilities	7,431	2,392
Due to related parties	288	178
Lease liability	3	130
Option liability	0	5,174
Total Current Liabilities	9,409	8,451
Long Term Liabilities
Due to related parties	0	2,212
Earnout shares liability	4,546	0
Warrant liability	140,534	0
Asset retirement obligation	2,018	2,416
Lease liability	0	656
TRA liability	9,376	0
Deferred taxes	63,609	0
Total Long Term Liabilities	220,083	5,284
Total Liabilities	229,492	13,735
Commitments and Contingencies (Note N)
Mezzanine Shareholders' and Members' Equity
Redeemable non-controlling interests in subsidiary	2,157,310	0
Shareholders’ and Members’ Equity
Capital stock 4,987,845 units authorized; 3,722,355 units issued and outstanding as of December 31, 2022 (Predecessor)	0	262,622
Preference shares, $.0001 par value; 1,000,000 shares authorized; no shares issued or outstanding as of September 30, 2023 (Successor) & December 31, 2022 (Predecessor)	0	0
Additional paid-in-capital	193,361	26,288
Accumulated other comprehensive income	0	17
Accumulated Deficit
Shareholders’ equity	(89,361)	(224,525)
Total Shareholders' and Members' Equity	104,021	64,402
Total Liabilities, Mezzanine Shareholders' and Members' Equity and Shareholders’ and Members’ Equity	2,490,823	78,137
Class A Common Stock
Shareholders’ and Members’ Equity
Common stock, value, issued	7	0
Class B ordinary shares
Shareholders’ and Members’ Equity
Common stock, value, issued	$ 14	$ 0

XML

Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2023	Dec. 31, 2022
Common unit, authorized (in shares)		4,987,845
Common unit, outstanding (in shares)		3,722,355
Common unit, issued (in shares)		3,722,355
Preferred stock, par value (in dollars per share)	$ 0.0001
Preferred stock, shares authorized (in shares)	1,000,000
Preferred stock, shares outstanding (in shares)	0
Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, shares issued (in shares)	0	0
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	520,000,000	520,000,000
Common stock, shares, issued (in shares)	71,014,190	0
Common stock, shares, outstanding (in shares)	71,014,190	0
Class B ordinary shares
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	310,000,000	310,000,000
Common stock, shares, issued (in shares)	141,529,513
Common stock, shares, outstanding (in shares)	141,529,513

XML

Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Revenue
Revenue	$ 0	$ 141	$ 0	$ 175	$ 574
Gross Profit (Loss)	(3)	92	(3)	172	306
Operating Expenses
Sales and marketing	931	136	1,087	869	504
Project development	582	0	698	1,191	0
Option settlement - related party	0	0	79,054	0	0
Depreciation, amortization and accretion	20,052	3,325	24,978	5,812	9,974
Total Operating Expenses	38,665	12,346	153,059	34,322	36,206
Operating Loss	(38,668)	(12,254)	(153,062)	(34,150)	(35,900)
Other Income (Expense)
Interest income (expense)	8,675	0	10,800	4	(1,470)
Other income (expense)	(61,983)	34	(60,970)	(30)	35
Net Other Income (Expense)	(53,308)	34	(50,170)	(26)	(1,435)
Net Loss before Income Tax	(91,976)	(12,220)	(203,232)	(34,176)	(37,335)
Income tax expense (benefit)	(10)	0	(681)	0	0
Net Loss after Income Tax	(91,966)	(12,220)	(202,551)	(34,176)	(37,335)
Net Loss attributable to non-controlling interests	(61,402)	0	(136,987)	0	0
Comprehensive Loss	(30,564)	(12,220)	(65,564)	(34,176)	(37,335)
Other Comprehensive Gain (Loss)
Foreign currency translation gain (loss)	1	(5)	0	0	(5)
Total Other Comprehensive Gain (Loss)	1	(5)	0	0	(5)
Comprehensive Loss	(91,965)	(12,225)	(202,551)	(34,176)	(37,340)
Comprehensive Loss attributable to non-controlling interests	(61,402)	0	(136,987)	0	0
Comprehensive Loss attributable to NET Power Inc.	$ (30,563)	$ (12,225)	$ (65,564)	$ (34,176)	$ (37,340)
Net loss per unit attributable to shareholders, diluted (in usd per share)	$ (0.44)	$ (10.69)	$ (0.96)	$ (9.07)	$ (13.15)
Net loss per unit attributable to shareholders, basic (in usd per share)	$ (0.44)	$ (10.69)	$ (0.96)	$ (9.07)	$ (13.15)
Weighted-average number shares outstanding, diluted (in shares)	68,966,972	1,143,430	68,644,032	3,766,871	2,838,388
Weighted-average number shares outstanding, basic (in shares)	68,966,972	1,143,430	68,644,032	3,766,871	2,838,388
Nonrelated Party
Revenue
Cost of revenue	$ 3	$ 11	$ 3	$ 3	$ 189
Operating Expenses
General and administrative	7,949	3,960	32,250	11,903	12,531
Research and development	8,658	590	14,401	1,643	2,264
Related Party
Revenue
Cost of revenue	0	38	0	0	79
Operating Expenses
General and administrative	147	162	158	228	383
Research and development	$ 346	$ 4,173	$ 433	$ 12,676	$ 10,550

XML

Consolidated Statement of Shareholders’ Equity and Non-Controlling Interest (Unaudited) (Successor) - USD ($) $ in Thousands	Total	NET Power, Inc.	NET Power, LLC.	RONI	Class A Common Stock	Class A Common Stock NET Power, Inc.	Class A Common Stock RONI	Class B ordinary shares	Common Stock Class A Common Stock	Common Stock Class A Common Stock NET Power, Inc.	Common Stock Class B ordinary shares	Common Stock Class B ordinary shares NET Power, Inc.	Common Stock Class B ordinary shares NET Power, LLC.	Common Stock Class A Ordinary Shares	Common Stock Class A Ordinary Shares NET Power, Inc.	Common Stock Class B Ordinary Shares	Common Stock Class B Ordinary Shares NET Power, Inc.	Additional Paid-in-Capital	Additional Paid-in-Capital NET Power, Inc.	Additional Paid-in-Capital NET Power, LLC.	Accumulated Deficit	Accumulated Deficit NET Power, LLC.	Total Stockholders' Equity	Total Stockholders' Equity NET Power, Inc.	Total Stockholders' Equity NET Power, LLC.	Non-controlling Interests	Non-controlling Interests NET Power, Inc.	Non-controlling Interests NET Power, LLC.
Common stock, beginning balance (in shares) at Dec. 31, 2022					0
Equity, beginning balance at Dec. 31, 2022	$ 64,402
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Loss	(34,176)
Common stock, ending balance (in shares) at Jun. 07, 2023									0		0			2,500		8,625,000
Equity, ending balance at Jun. 07, 2023									$ 0		$ 0			$ 0		$ 1		$ 0			$ (98,966)		$ (98,965)			$ 0
Temporary equity, ending balance (in shares) at Jun. 07, 2023					34,500,000
Temporary equity, ending balance at Jun. 07, 2023	356,318				$ 356,318
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sponsor forfeiture of RONI Class B ordinary shares and reservation of earnout shares (in shares)																(1,986,775)
Redemption of Class A Common Stock (in shares)								3,606,657	3,606,657
Redemption of Class A Common Stock																		50,526					50,526			(50,526)
Conversion of RONI Class A and Class B ordinary shares into NET Power, Inc. Class A and Class B Common Stock, respectively (in shares)										13,307,276		6,638,225	129,822,703		(2,500)		(6,638,225)
Conversion of RONI Class A and Class B ordinary shares into NET Power Inc. Class A and Class B Common Stock, respectively										$ 1		$ 1	$ 12				$ (1)		$ 60,045	$ (940)		$ 75,711		$ 60,046	$ 74,783		$ 87,094	$ 1,677,546
Issuance of RONI Class A Common Stock to PIPE Investors (in shares)									54,044,995
Issuance of RONI Class A Common Stock to PIPE investors									$ 6									540,445					540,451
Issuance of Class A Common Stock (in shares)									52,523
Equity awards vested due to Business Combination (in shares)											8,356,635
Equity awards vested due to Business Combination											$ 1							542			(542)		1			109,639
Exercise of warrants (in shares)									2,739
Exercise of warrants																		47					47
Member tax distributions																										181
Establishment of liabilities under tax receivable agreement																		(2,207)					(2,207)
Vesting of earnout shares																										9,055
Amortization of share based payments (in shares)													318,607
Amortization of share based payments																		261					261			6,312
Adjustment of redeemable non-controlling interest to redemption value																		(455,358)					(455,358)			455,358
Comprehensive Loss	(202,551)																				(65,564)		(65,564)			(136,987)
Common stock, ending balance (in shares) at Sep. 30, 2023					71,014,190			141,529,513	71,014,190		141,529,513			0		0
Equity, ending balance at Sep. 30, 2023	104,021								$ 7		$ 14			$ 0		$ 0		193,361			(89,361)		104,021			2,157,310
Increase (Decrease) in Temporary Equity [Roll Forward]
Redemption of Class A ordinary shares by RONI public shareholders (shares)							(21,195,224)
Redemption of Class A ordinary shares by RONI public shareholders	50,526			$ (218,983)			$ (218,983)
Temporary equity, conversion of RONI Class A and Class B ordinary shares into NET Power, Inc. Class A and Class B Common Stock, respectively (in shares)						(13,304,776)
Temporary equity, conversion of RONI Class A and Class B ordinary shares into NET Power, Inc. Class A and Class B Common Stock, respectively		$ (50,241)				$ (137,335)
Temporary equity, equity awards vested due to Business Combination	109,639
Temporary equity, issuance of RONI Class B Common Stock to Former NET Power, LLC Unitholders			$ 1,677,546
Temporary equity, member tax distributions	(181)
Temporary equity, vesting of earnout shares	9,055
Temporary equity, shares issued, value, share-based payment arrangement, forfeited	6,312
Temporary equity, adjustment of redeemable non-controlling interest to redemption value	455,358
Temporary equity, net loss	(136,987)
Temporary equity, ending balance (in shares) at Sep. 30, 2023					0				140,228,066		6,967,050
Temporary equity, ending balance at Sep. 30, 2023	2,157,310				$ 0
Common stock, beginning balance (in shares) at Jun. 30, 2023									67,352,271		142,711,590			0		0
Equity, beginning balance at Jun. 30, 2023									$ 7		$ 14			$ 0		$ 0		514,219			(58,798)		455,442			1,885,319
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of Class A Common Stock (in shares)								3,606,657	3,606,657
Redemption of Class A Common Stock																		50,526					50,526			(50,526)
Conversion of RONI Class A and Class B ordinary shares into NET Power, Inc. Class A and Class B Common Stock, respectively (in shares)													2,105,973
Conversion of RONI Class A and Class B ordinary shares into NET Power Inc. Class A and Class B Common Stock, respectively																				$ (928)					$ (928)			$ 928
Issuance of Class A Common Stock (in shares)									52,523
Exercise of warrants (in shares)									2,739
Exercise of warrants																		47					47
Member tax distributions																										181
Establishment of liabilities under tax receivable agreement																		(2,207)					(2,207)
Vesting of earnout shares																										9,055
Amortization of share based payments (in shares)								318,607
Amortization of share based payments																		261					261			5,560
Adjustment of redeemable non-controlling interest to redemption value																		(368,557)					(368,557)			368,557
Comprehensive Loss	(91,966)																				(30,563)		(30,563)			(61,402)
Common stock, ending balance (in shares) at Sep. 30, 2023					71,014,190			141,529,513	71,014,190		141,529,513			0		0
Equity, ending balance at Sep. 30, 2023	104,021								$ 7		$ 14			$ 0		$ 0		$ 193,361			$ (89,361)		$ 104,021			$ 2,157,310
Temporary equity, beginning balance (in shares) at Jun. 30, 2023					0
Temporary equity, beginning balance at Jun. 30, 2023	1,885,319				$ 0
Increase (Decrease) in Temporary Equity [Roll Forward]
Redemption of Class A ordinary shares by RONI public shareholders	50,526
Temporary equity, issuance of RONI Class B Common Stock to Former NET Power, LLC Unitholders			$ 928
Temporary equity, member tax distributions	(181)
Temporary equity, vesting of earnout shares	9,055
Temporary equity, shares issued, value, share-based payment arrangement, forfeited	5,560
Temporary equity, adjustment of redeemable non-controlling interest to redemption value	368,557
Temporary equity, net loss	(61,402)
Temporary equity, ending balance (in shares) at Sep. 30, 2023					0				140,228,066		6,967,050
Temporary equity, ending balance at Sep. 30, 2023	$ 2,157,310				$ 0

XML

Consolidated Statement of Members’ Equity (Unaudited) (Predecessor) - USD ($) $ in Thousands	Total	Occidental Petroleum	BHES	BHES BHES Bonus Shares	BHES In-Kind Shares	Constellation	Membership Interests	Membership Interests Occidental Petroleum	Membership Interests BHES	Membership Interests BHES BHES Bonus Shares	Membership Interests BHES In-Kind Shares	Membership Interests Constellation	Additional Paid-in-Capital	Additional Paid-in-Capital BHES BHES Bonus Shares	Additional Paid-in-Capital BHES In-Kind Shares	Accumulated Other Comprehensive Income	Accumulated Deficit
Common unit, outstanding, beginning balance (in shares) at Dec. 31, 2021							3,555,553
Beginning balance, members' equity at Dec. 31, 2021	$ 67,508						$ 227,960						$ 9,275			$ 20	$ (169,747)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share issuances (in shares)			142,180							17,799	3,399
Issuance of RONI Class B Common Stock to former NET Power, LLC unitholders			$ 30,000	$ 7,170	$ 1,439				$ 6,934	$ 3,756	$ 717			$ 3,414	$ 722
(Less Equity Issuance Cost)			$ (534)						(534)
Vesting of Profits Interests	7,777												7,777
Comprehensive Loss	(37,340)															(5)	(37,335)
Common unit, outstanding, ending balance (in shares) at Sep. 30, 2022							3,718,931
Ending balance, members' equity at Sep. 30, 2022	76,020						$ 261,899						21,188			15	(207,082)
Common unit, outstanding, beginning balance (in shares) at Jun. 30, 2022							3,716,149
Beginning balance, members' equity at Jun. 30, 2022	82,752						$ 261,312						16,282			20	(194,862)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share issuances (in shares)											2,782
Issuance of RONI Class B Common Stock to former NET Power, LLC unitholders				2,689	722				723		$ 587			2,689	135
Vesting of Profits Interests	2,082												2,082
Comprehensive Loss	(12,225)															(5)	(12,220)
Common unit, outstanding, ending balance (in shares) at Sep. 30, 2022							3,718,931
Ending balance, members' equity at Sep. 30, 2022	$ 76,020						$ 261,899						21,188			15	(207,082)
Common unit, outstanding, beginning balance (in shares) at Dec. 31, 2022	3,722,355						3,722,355
Beginning balance, members' equity at Dec. 31, 2022	$ 64,402						$ 262,622						26,288			17	(224,525)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share issuances (in shares)								37,152			15,491	28,764
Issuance of RONI Class B Common Stock to former NET Power, LLC unitholders		$ 11,859		$ 4,690	$ 3,903	$ 9,181		$ 11,859	$ 3,902		$ 3,269	$ 9,181		$ 4,690	$ 634
Vesting of Profits Interests	2,864												2,864
Comprehensive Loss	(34,176)																(34,176)
Common unit, outstanding, ending balance (in shares) at Jun. 07, 2023							3,803,762
Ending balance, members' equity at Jun. 07, 2023	$ 62,723						$ 286,931						$ 34,476			$ 17	$ (258,701)

XML

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Cash Flows from Operating Activities
Net Loss before Income Tax	$ (202,551)	$ (34,176)	$ (37,335)
Adjustments to reconcile net loss to net cash (used in) operating activities:
Depreciation	3,972	5,700	9,797
Amortization	20,922	9	16
Accretion	51	102	161
Non-cash interest expense	0	30	1,388
Non-cash lease expense	87	59	0
Conversion of equity awards	86,585	0	0
Allowance for doubtful accounts	0	352	0
Deferred taxes	(681)	0	0
Change in fair value of earnout shares liability	1,497	0	0
Change in fair value of warrant liability	58,344	0	0
Vesting of Profits Interests	0	2,864	7,777
Vesting of earnout shares	1,118	0	0
Amortization of share based payments	6,572	8,593	8,609
Changes in operating assets and liabilities:
Trade receivables	0	0	(344)
Interest receivable	(2,903)	0	0
Prepaid expenses	(2,026)	(453)	515
Other current assets	91	1,765	(660)
Accounts payable	(887)	1,768	(1,478)
Accrued liabilities	(5,796)	(384)	(43)
Lease liabilities	(56)	(55)	0
Due to related parties – short term	288	5,414	(2,291)
Due to related parties – long term	0	(2,211)	1,257
Net Cash (Used in) Operating Activities	(35,373)	(10,623)	(12,631)
Cash Flows from Investing Activities
Cash acquired as part of Business Combination (Note C)	7,947	0	0
Acquisition of short term investments	(100,000)	0	0
Acquisition of property, plant and equipment	(3,875)	(2,431)	0
Net Cash (Used in) Investing Activities	(95,928)	(2,431)	0
Cash Flows from Financing Activities
Repurchase of redeemed Class A Ordinary Shares	(218,983)	0	0
Issuance of Class A Common Stock from warrant exercise	47	0	0
Member tax distributions	(181)	0	0
Proceeds from PIPE financing, net of issuance costs	540,451	0	0
Payment of transaction expenses	(11,722)	0	0
Member loan proceeds	0	0	2,000
Member loan repayments	0	0	(10,000)
(Less equity issuance costs)	0	0	(534)
Net Cash Provided by Financing Activities	319,529	15,836	21,466
Net Increase in Cash	188,228	2,782	8,835
Effect of foreign currency exchange rate changes on cash	1	0	(5)
Cash, beginning of period	7,946	5,164	445
Cash, end of period	545,248	7,946	9,275
Supplemental Disclosures of Cash Flow Information
Cash paid for interest	0	0	81
Remeasurement of lease liabilities and right of use assets due to lease modification (Note M)	(672)	0	0
Nonrelated Party
Cash Flows from Financing Activities
Share issuances	0	15,836	30,000
Related Party
Cash Flows from Financing Activities
Share issuances	$ 9,917	$ 0	$ 0

XML

Organization and Nature of the Business

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Nature of the Business

Organization and Nature of the Business

NET Power Inc. has developed a proprietary process for producing electricity using a predominantly carbon dioxide working fluid that involves the capture and reuse, sale and sequestration of carbon dioxide (the "NET Power Cycle"). The NET Power Cycle is the subject of U.S. and foreign patents, as well as additional applications and provisional applications on file with the United States Patent and Trademark Office and international patent authorities. The Company’s technology is designed to generate electricity from natural gas that is cost-competitive with conventional technologies, while eliminating nearly all air emissions.

The Company commissioned a 50 MWth natural gas-fired demonstration power plant (“Demonstration Plant”) to allow sufficient demonstration and testing of the NET Power Cycle and its components. The Company achieved first-fire at the Demonstration Plant in May 2018, after two years of development. Additional testing occurred periodically thereafter, including a three-month test campaign in 2021 which resulted in a grid synchronization. The successful first-fire and 2021 testing campaign of the Demonstration Plant represent critical milestones as they supported validation of the technical foundation of the NET Power Cycle. Over the next several years, the Company plans to conduct additional research and testing campaigns at its Demonstration Plant and construct its first utility-scale plant.

The Company’s current activities are subject to significant risks, including cost over-runs in the testing and operation of the Demonstration Plant, technical problems with the NET Power Cycle, and development of competing clean-energy technology sooner or at a lesser cost than the NET Power Cycle.

The Company consummated the Business Combination (Note C) on June 8, 2023.

XML

Basis of Presentation and Significant Accounting Policies

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Basis of Presentation and Significant Accounting Policies

Basis of Presentation and Significant Accounting Policies

Basis of Presentation - The accompanying unaudited consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America ("US GAAP") and include some amounts that are based upon management estimates and judgments. In the Company's opinion, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly the Company's financial position, results of operations and cash flows for the periods presented. Such adjustments consist solely of normal, recurring adjustments.

Recently Issued Accounting Standards - During October, 2023, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") 2023-06 - Disclosure Improvements: Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative ("ASU 2023-06"). ASU 2023-06 incorporates 14 of the 27 disclosure requirements published in SEC Release No. 33-10532 - Disclosure Update and Simplification into various topics within the Accounting Standards Codification ("ASC"). ASU 2023-06's amendments represent clarifications to, or technical corrections of, current requirements. For SEC registrants, the effective date for each amendment will be the date on which the SEC removes that related disclosure from its rules. Early adoption is prohibited. The Company does not expect ASU 2023-06 to have a material effect on its financial statements.

Principles of Consolidation – The Consolidated Balance Sheets and Consolidated Statements of Operations and Comprehensive Loss include the accounts of subsidiaries that NET Power Inc. consolidates according to the rules set forth in ASC Topic 810 – Consolidation (“ASC 810”). The Company consolidates all subsidiaries in which it owns a 50.0% or greater ownership interest and all variable interest entities ("VIE's") to which it is deemed to represent the primary beneficiary, as described below. The Consolidated Balance Sheets and the Consolidated Statement of Operations and Comprehensive Loss include the accounts of the following wholly-owned subsidiaries and consolidated VIE's: NET Power Europe LTD (“NP Europe”); NET Power Friendship 7, LLC; NET Power Technology, LLC; NET Power Atlas, LLC; NET Power Canaveral, LLC; NET Power Services, LLC, NET Power Management Holdings Inc.; NET Power Management LLC; NET Power Operations LLC ("OpCo"); NET Power Intermediate LLC and NET Power, LLC. Intercompany balances have been eliminated through the consolidation process.

ASC 810 requires that a reporting entity that possesses a controlling financial interest in a VIE consolidate that VIE. A controlling financial interest will have both of the following characteristics: (a) the power to direct the activities that most significantly impact the VIE's economic performance; and (b) the obligation to absorb the VIE's losses and the right to receive benefits that are significant to the VIE. The Company determined that NET Power Operations LLC meets the definition of a VIE and that the Company became the primary beneficiary of it beginning on the Closing Date of the

Business Combination (Note C); therefore, the Company has consolidated NET Power Operations LLC from the date of the Business Combination.

Business Combination – The Company applies the guidance within ASC Topic 805 – Business Combinations ("ASC 805") to all merger and acquisition transactions, including the Business Combination (Note C), through which the Company obtains control over one or more other businesses.

The Company may elect the acquisition method for all transactions and other events through which the Company obtains control over one or more other businesses, including the Business Combination (Note C). Under the acquisition method, assets acquired and liabilities assumed are measured at fair value as of the acquisition date. Liabilities related to contingent consideration are recognized on the acquisition date and re-measured at fair value in each subsequent reporting period, if the contingent consideration is liability classified. Goodwill is recognized as the excess of the consideration transferred over the fair value of the net identifiable assets acquired.

Segment Reporting - In accordance with ASC Topic 280 – Segment Reporting, the Company has one operating segment and one reportable segment. The Company has one line of business.

Revenue Recognition, Trade Receivables and Allowance for Doubtful Accounts – The Company follows the guidance within ASC Topic 606 – Revenue from Contracts with Customers to determine how and when it recognizes revenues. The Company accounts for a customer contract when both parties have approved the contract and are committed to perform their respective contractual obligations, each party’s rights can be identified, payment terms can be identified, the contract has commercial substance and it is probable that the Company will collect the consideration to which it is entitled.

When billed in advance, the payment is deferred and recognized upon delivery of the service. Collectability is assessed based on a number of factors including collection history and customer creditworthiness. If collectability of substantially all consideration to which the Company is entitled under the contract is determined to be not probable, revenue is not recorded until collectability becomes probable. Revenue is recorded based on the transaction price excluding amounts collected on behalf of third parties, such as sales taxes collected and remitted to governmental authorities.

Trade receivables are recorded at the invoiced amount and do not bear interest. The Company calculates an allowance for doubtful accounts based on a risk assessment performed when trade receivables are recognized. The allowance is calculated in accordance with ASC Topic 326 - Current Expected Credit Losses. Write-offs are recorded at the time when trade receivables are deemed uncollectible.

The Company has historically recognized revenue from two primary sources, feasibility studies and government grants. Feasibility studies represent reports prepared to assist a customer in determining the viability of the NET Power Cycle for their specific use case. Government grants represent U.S. federal programs that incentivize the development of novel energy solutions. The Company has served as a sub-recipient to such government grants. Feasibility studies generally contain one performance obligation, the customer’s acceptance of the feasibility study report at the end of the review period. Government grants generally contain multiple performance obligations related to the incursion of costs associated with the development of in-scope activities that entitle the Company, as sub-recipient, to reimbursement from the primary grant recipient.

Fair Value - Certain assets and liabilities are carried at fair value in accordance with ASC Topic 820 – Fair Value Measurement. Fair value is defined as the price that would be received for an asset or paid to transfer a liability (i.e., the exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The guidance establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

•Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities;

•Level 2 - Significant other observable inputs other than Level 1 prices, such as quoted prices for similar, but not identical, assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data; and

•Level 3 - Significant unobservable inputs in which there is little or no market data available and requires the Company to develop its own assumptions that market participants would use in pricing an asset or liability.

Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of any input that is significant to the fair value measurement. The Company’s estimates of fair values are based upon assumptions believed to

be reasonable, but which are uncertain and involve significant managerial judgments made by considering factors specific to the asset or liability. The determination of fair value requires more judgment to the extent the valuation is based on models or inputs that are less observable or unobservable in the market. Accordingly, the degree of judgment exercised by the Company in determining the fair value is greatest for instruments categorized as Level 3.

The Company’s recurring fair value measurements comprise the Private Placement Warrants, the Public Warrants, the Earnout Shares (as defined below) and short-term investments (Note I).

Cash - Cash consists of liquid deposits at banking institutions that are members of the Federal Deposit Insurance Corporation (“FDIC”) and the Financial Services Compensation Scheme (“FSCS”), the UK’s statutory compensation system for customers of authorized financial services firms. FDIC guidelines guarantee $250 per depositor, per insured bank and FSCS guidelines guarantee £85 per depositor per insured bank. As of September 30, 2023 (Successor) and December 31, 2022 (Predecessor), the Company possessed funds in excess of FDIC limits equal to $544,727 and $4,644 respectively. The carrying value of cash equals its fair value.

Warrants - The Company issued Public Warrants and Private Placement Warrants prior to the consummation of the Business Combination (Note C). The Company accounts for both the Public Warrants and Private Placement Warrants as liability-classified instruments based on an assessment of the Warrants’ specific terms and applicable authoritative guidance outlined in ASC Topic 480 - Distinguishing Liabilities from Equity ("ASC 480"), ASC Topic 815 - Derivatives and Hedging ("ASC 815") and relevant SEC reporting rules. The guidance considers whether the Warrants are freestanding financial instruments pursuant to ASC 480, whether the Warrants meet the definition of a liability pursuant to ASC 480, whether the Warrants meet all of the requirements for equity classification under ASC 815 and whether class of equity into which the Warrants settle possess substantive voting rights. This assessment is conducted at the time of the instruments’ issuance and at each subsequent quarterly period end date while the Warrants remain outstanding. In compliance with ASC 815, the Company accounts for the outstanding Warrants as a liability at fair value on the Consolidated Balance Sheets. The Warrants are subject to remeasurement at each Balance Sheets date with any change in the Warrants’ fair value recognized in the Company’s Consolidated Statements of Operations and Comprehensive Loss.

Short-Term Investments - The Company classifies investments with maturities greater than three months but less than one year as short-term investments. As of September 30, 2023, the Company's short-term investment balance consisted of a single six-month certificate of deposit custodied by a domestic banking institution.

Short-term investments are classified as held-to-maturity according to the guidance contained within ASC 326 - Financial Instruments - Credit Losses because the Company has the intent and ability to hold the certificate of deposit until maturity. Interest income generated from short-term investments is recorded as interest income in the Company's Consolidated Statements of Operations and Comprehensive Loss.

Tax Receivable Agreement Liability - As part of the Business Combinations (Note C), the Company entered into the TRA with certain OpCo unitholders that will represent approximately 75% of the calculated tax savings based on the portion of basis adjustments on exchanges of OpCo units and other carryforward attributes that are anticipated to be able to be utilized in future years. Such tax attributes include the existing tax basis of certain assets of OpCo and its consolidated subsidiaries; tax basis adjustments resulting from taxable exchanges of Class A OpCo Units; certain tax benefits realized by NET Power Inc. as a result of the Business Combination and tax deduction in respect of portions of certain TRA payments. All such payments made under the terms of the TRA are the obligations of NET Power Inc. and not of OpCo.

Reference Note O to review additional information about the TRA Liability.

Intangible Assets - The Company accounts for intangible assets, which consist of developed technology related to the NET Power Cycle, in accordance with ASC Topic 350 - Goodwill and Other Intangible Assets (“ASC 350”). The following table summarizes the estimated useful lives used to amortize definite lived intangible assets:

Intangible Asset Classification	Useful Life
Developed Technology	20

The weighted average amortization period for all intangible assets is 20 years.

Goodwill - The Company recognizes goodwill in accordance with ASC 350. Goodwill represents the excess costs of an acquired entity over the amounts assigned to assets acquired and liabilities assumed in a business combination. Goodwill is

not amortized but is tested annually for impairment. During the June 8, 2023 through September 30, 2023 (Successor) period, the Company determined that no impairment charges for goodwill were required to be recognized.

Prepaid Expenses - Prepaid expenses consist of costs paid in advance for software and other subscriptions, patent renewal fees, general liability insurance and employee health insurance.

Property, Plant and Equipment - Property, plant and equipment are recorded at the historical cost to acquire the assets. The costs bases of property, plant and equipment to which the Company held title prior to the Business Combination completion (Note C) were stepped-up to their respective fair values on June 8, 2023 in accordance with the closure of the Business Combination. The Demonstration Plant's depreciable value consists of costs associated with the engineering, procurement, and construction of the facility.

Depreciation is calculated on the straight-line method over the estimated useful lives of the assets. Amounts capitalized to construction in progress are not depreciated until the underlying asset is placed into service. The following table summarizes the estimated useful lives used to depreciate property, plant and equipment and assets:

Asset Classification	Useful Life
Furniture and Equipment	4 – 7
Demonstration Plant	7
Construction in Progress	—

Impairment of Definite-Lived Assets - In accordance with ASC Topic 360 - Property, Plant and Equipment, tangible and intangible assets with finite useful lives are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets placed in service is measured by comparing the carrying amount of an asset or asset group to the future undiscounted cash flows expected to be generated by the asset or asset group. If such assets are considered to be impaired, impairment equals the amount by which the carrying amount of the assets exceeds the fair value of the assets. There were no impairment charges recorded during the June 8 through September 30, 2023 (Successor) period or during the year ended December 31, 2022 (Predecessor).

Lease Agreements – Lease agreements may fall within two categories according to ASC Topic 842 – Leases ("ASC 842"), operating leases or financing leases. Both operating and finance leases result in the recognition of lease liabilities and associated right-of-use assets that are valued at the net present value of the lease payments and recognized. The Company has elected the short-term lease exception and therefore only recognizes right-of-use assets and lease liabilities for leases with a term greater than one year. The lease term includes the committed lease term identified in the contract, taking into account renewal and termination options that management is reasonably certain to exercise. The discount rate used in the measurement of a right-to-use asset and lease liability is the rate implicit in the lease whenever that rate is readily determinable. If the rate implicit in the lease is not readily determinable, the Company uses its incremental borrowing rate as a proxy for the discount rate based on the term of the lease unless the implicit rate is available.

Asset Retirement Obligation – The Company recognizes liabilities and the corresponding assets for future obligations associated with the retirement of assets. The fair values of legal obligations to retire and remove long-lived assets are recorded in the period in which the obligation is incurred. Prior to the consummation of the Business Combination (Note C), asset retirement obligations were reflected in property, plant and equipment. In conjunction with the Business Combination, the Company re-measured its property, plant and equipment assets at their respective June 8, 2023 fair values, which resulted in the asset retirement obligation being removed from Property, plant and equipment on the Consolidated Balance Sheets. When an asset retirement obligation arises, the liabilities and corresponding assets are recorded at their present values using a discounted cash flow approach and the liabilities are accreted using the interest method. The asset retirement costs and corresponding liabilities that have been recorded to-date relate to the obligations of the land lease for the property underneath the Demonstration Plant at the end of the Demonstration Plant's estimated useful life.

The Company’s valuation of the asset retirement obligation related to the Demonstration Plant encompasses an estimate for the cost to restore the site as required by lease terms. The accretion expense generated by the Company’s asset retirement obligation liability is recognized ratably over the Demonstration Plant’s expected seven year useful life.

Net Loss per Unit - During the Predecessor Period, the Company computed basic net loss per unit by dividing the total net loss applicable to membership interest holders by the weighted average number of membership interests outstanding during the period. The Company computed diluted net loss per unit by dividing the net loss applicable to membership interest holders by the sum of the weighted-average number of membership interests outstanding during the period and the

potentially dilutive effects of distribution units, profits interests and options to purchase membership interests. Such items were excluded if their effect was anti-dilutive. Since the impact of the distribution units, profits interests, and options to purchase membership interests were anti-dilutive during periods of net loss, there was no difference between the Company’s basic and diluted net loss per unit for the period from January 1, 2023 through June 7, 2023 (Predecessor) or the year ended December 31, 2022 (Predecessor).

Net Loss per Share - During the Successor Period, basic net loss per share is computed based on the weighted average number of shares of Class A Common Stock outstanding. Diluted net loss per share is computed based on the weighted average number of common shares outstanding, increased by the number of any additional shares that would have been outstanding had any potentially dilutive common shares been issued. For the purposes of the diluted earnings per share calculation, Warrants, Earnout Shares, restricted stock units and conversion of OpCo Units are excluded from the calculation for the period from June 8 through September 30, 2023 (Successor), as the inclusion would be anti-dilutive due to the losses reported in the year.

Equity Based Compensation – The Company applies ASC Topic 718 – Share-Based Payments (“ASC 718”) to account for its equity awards. Equity awards granted to employees include unvested Class A OpCo Units and a corresponding number of unvested shares of Class B Common Stock and RSU's that settle into shares of Class A Common Stock upon vesting. Generally, each award is subject to a service condition that requires a specific period of continued employment or service to the Company to elapse before the award fully vests. Certain awards also include performance conditions to vest fully. The Board’s Compensation Committee establishes these service and performance conditions.

The estimated fair value of NET Power, LLC membership units was determined by an independent, external valuation service provider at each equity grant date until the the Closing Date, upon which the Company became publicly traded. On the Closing Date, the Company fair valued the OpCo Units used to satisfy outstanding share-based awards at the fair value of the Company's Class A Common Stock.

In accordance with ASC 718, the Company recognizes expense related to equity awards for which vesting is considered probable. Forfeitures are recognized as they occur. For service-based awards, compensation cost is measured at fair value on the grant date and expensed ratably over the vesting term. For performance-based grants, the fair value is measured on the grant date and recognized as non-cash compensation expense, considering the probability of the targets being achieved. The Company recognizes compensation expense generated by all service-based awards on a straight-line basis over the underlying awards's vesting period.

Earnout Shares and Restricted Shares - As part of the Business Combination (Note C), 128,908,518 Class A OpCo Units and a corresponding number of shares of Class B Common Stock, 7,624,999 Class B OpCo Units and a corresponding number of shares of Class B Common Stock and 54,047,495 shares of Class A Common Stock owned by the Sponsor, the Sponsor's affiliates and private investors were subjected to certain vesting and transfer restrictions. Upon conversion of Class B OpCo Units to Class A OpCo Units (Note K), the 6,072,463 Class B OpCo Units subject to vesting and transfer restrictions became Class A OpCo Units.

Of the total shares subject to vesting and transfer restrictions, 986,775 Class A OpCo Units, all of which were formerly Class B OpCo Units, and a corresponding number of shares of Class B Common Stock vest in three equal tranches contingent upon the share price of the Class A Common Stock (the "Earnout Shares"). The first tranche vests if the closing price of the Class A Common Stock on the NYSE is greater than or equal to $12.00 for any 20 trading days within a consecutive 30-trading-day period beginning on or after June 23, 2023. The second tranche vests if the closing price of the Class A Common Stock on the NYSE is greater than or equal to $14.00 for any 20 trading days within a consecutive 30-trading-day period beginning on or after June 23, 2023. The third tranche vests if the closing price of the Class A Common Stock on the NYSE is greater than or equal to $16.00 for any 20 trading days within a consecutive 30-trading-day period beginning on or after June 23, 2023 and ending on the three-year anniversary of the Closing Date.

Of the OpCo Units subject to transfer restrictions, 44,544,551 Class A OpCo Units, of which 1,575,045 were formerly Class B OpCo Units, (the “Price-Based Lock-up Shares”) may not be transferred until after the three-year anniversary of the Closing Date; provided, however, that if the last sale price of the Class A Common Stock on the NYSE, for any 20 trading days within any 30 consecutive trading-day period commencing on or after June 23, 2023 exceeds (or, in the case of the 1,575,045 Class A OpCo Units that were formerly Class B OpCo Units, equals) (i) $12.00 per share, then one-third of the Price-Based Lock-up Shares will no longer be subject to such lock-up restrictions, (ii) $14.00 per share, then an additional one-third of the Price-Based Lock-up Shares will no longer be subject to such lock-up restrictions, and (iii) $16.00 per share, then all of the Price-Based Lock-up Shares will no longer be subject to such lock-up restrictions.

The remaining 89,449,655 Class A OpCo Units, of which 3,510,643 were formerly Class B OpCo Units (the “Time-Based Lock-up Shares”) subject to transfer restrictions may not be transferred until after the one-year anniversary of the Closing Date; provided, however, that if the last sale price of the Class A Common Stock on the NYSE, for any 20 trading days within any 30 consecutive trading-day period commencing on or after December 8, 2023, exceeds (or in the case of the 3,510,643 Class A OpCo Units that were formerly Class B OpCo Units, equals) $12.00 per share, then the Time-Based Lock-up Shares will no longer be subject to such lock-up restrictions.

Unvested Earnout Shares are reported as liabilities within the Company’s Consolidated Balance Sheets. The liability classification reflects the Company’s evaluation of the Earnout Shares according to ASC 480’s and ASC 815’s standards. The Price Based Lockup Shares and the Time-Based Lockup Shares are included as equity within the Company's Consolidated Balance Sheets.

Non-Controlling Interest - Non-controlling interests (“NCI”) represent Legacy NET Power Holders partners’, sponsors' and certain strategic partners' respective ownership of OpCo. After the conversion of Class B OpCo Units to Class A OpCo Units, NCI is comprised exclusively of Class A OpCo Units (Note K). After evaluating Class A OpCo Unit redemption rights under ASC 480, the Company determined that Class A OpCo Units are subject to potential cash redemption that rests outside the Company's control. The Company has classified NCI as a component of mezzanine equity in consideration of this cash redemption feature and in accordance with ASC 810's guidance.

After considering the effects of consolidation, the Company owns 32.6% of OpCo and NCI holders own the residual 67.4%. The Company's net loss before income tax and its comprehensive loss in the Successor Period are reduced by the portions of net loss before income tax and comprehensive loss, respectively, that are attributable to non-controlling interests.

Research and Development Costs - The Company expenses costs related to operations and testing at the Demonstration Plant, as well as engineering and design costs related to development of the NET Power Cycle as incurred. These costs are included in Research and Development on the Consolidated Statements of Operations and Comprehensive Loss.

Related Parties –The Company applies ASC Topic 850 – Related Parties ("ASC 850") and prevailing SEC guidance to classify and report transactions with related parties.

The Company has entered into contractual relationships with several of its current shareholders and former members that qualify as related parties according to the aforementioned criteria. These relationships include loans from members and master service agreements (“MSA's”).

Income and Uncertain Taxes – The Company applies the guidance set forth in ASC Topic 740 – Income Taxes (“ASC 740”) to evaluate its tax positions. The Company evaluates the realizability of deferred tax assets on a quarterly basis and establishes a valuation allowance when it is more-likely-than-not that all or a portion of a deferred tax asset may not be realized. The Company calculates the provision for income taxes during interim periods by applying an estimate of the forecasted annual effective tax rate for the full fiscal year to ordinary income or loss (pretax income or loss excluding unusual or infrequently occurring discrete items) for the reporting period.

NET Power Inc. consolidates the financial results of OpCo in its consolidated financial statements. OpCo represents a pass-through entity for U.S. federal and most applicable state and local income tax purposes. As a pass-through entity for tax purposes, OpCo is not subject to U.S. federal and certain state and local income taxes. Any taxable income or loss generated by OpCo is passed through to its members, including NET Power Inc., which is taxed as a corporation that pays corporate federal, state and local taxes with respect to income allocated from OpCo based on its economic interest in OpCo.

NP Europe is subject to taxation pursuant to UK tax regulations. For the quarter ended September 30, 2023 (Successor) and the year ended December 31, 2022 (Predecessor), NP Europe incurred taxable losses, which may be used to offset future profits. The Company has established a valuation allowance against possible future tax benefits because the ability to recognize these benefits does not meet ASC 740's more-likely-than-not recognition threshold; therefore, no provision or asset for UK income taxes has been included in the consolidated financial statements.

Management evaluated the Company’s tax positions and concluded that the Company had taken no uncertain tax positions that require adjustment to comply with the applicable accounting guidance.

XML

Business Combination

9 Months Ended

Sep. 30, 2023

Business Combination and Asset Acquisition [Abstract]

Business Combination

Business Combination

RONI, a Cayman Islands exempted company, was organized as a blank check company formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses. On June 18, 2021, RONI completed its IPO, generating gross proceeds of approximately $345,000. The net proceeds from the IPO were subsequently placed in a trust account for the intended purpose of consummating a business combination.

On December 13, 2022, NET Power, LLC entered into a Business Combination Agreement with RONI, RONI Holdings, Buyer and Merger Sub. On the Closing Date, Merger Sub merged with and into NET Power, LLC, with NET Power, LLC continuing as the surviving entity, resulting in it becoming a majority-owned, direct subsidiary of Buyer. RONI OpCo renamed itself NET Power Operations LLC and RONI renamed itself NET Power Inc. upon completion of the Business Combination.

The Business Combination resulted in an umbrella partnership, C corporation or “Up-C” structure. Immediately prior to the execution of the Business Combination Agreement, RONI OpCo represented a VIE in accordance with ASC 810’s guidance; therefore, RONI represented the accounting acquirer within the Business Combination structure. The Company elected push-down accounting for the Business Combination and recorded the push-down entries at RONI OpCo.

As a result of the Business Combination, the Company's financial statement presentation distinguishes NET Power, LLC as the "Predecessor" through June 7, 2023. NET Power Inc. is the "Successor" for periods after the Closing Date. Revenue and earnings from the date of the Business Combination to period-end are shown as the "Successor" period on the Consolidated Statements of Operations and Comprehensive Loss. As a result of the application of the acquisition method of accounting in the Successor Period, the consolidated financial statements for the Successor Period are presented on a full step-up basis; therefore, Successor Period consolidated financial statements are not comparable to the consolidated financial statements of the Predecessor Period, which are not presented on the same full step-up basis.

The result of the Business Combination generated the following financial results:

•The Business Combination generated $121,883 of expenses, including $16,021 of acquirer expenses recorded “on-the-line” because they would not have been incurred had the Business Combination not closed.

•In contemplation of the Business Combination, the Company modified certain outstanding profits interests awards, a portion of which vested during the pre-combination period. The Company included $325 of previously vested, modified Profits Interests issued to the award recipient as consideration transferred to sellers.

•Certain outstanding Profits Interests, which were not modified in contemplation of the Business Combination, that vested during the pre-combination period and that were issued to recipients as part of the Business Combination were included in consideration transferred to sellers. The total fair value of previously vested, unmodified Profits Interests included in consideration transferred to sellers equaled $651.

•All outstanding NET Power, LLC member interests converted into 136,073,365 vested Class A OpCo Units and a corresponding number of vested shares of Class B Common Stock, 1,119,198 unvested Class A OpCo Units and 1,119,198 unvested shares of Class B Common Stock upon completion of the Business Combination.

•The Company registered and issued 67,352,271 shares of Class A Common Stock on the NYSE.

•The Company recorded 8,624,974 Public Warrants exercisable into 8,624,974 shares of Class A Common Stock at a price of $11.50 per share. The Company may redeem the Public Warrants for $0.01 if the last reported trading price of the Company's Class A Common Stock price equals or exceeds $18.00 per share for any 20 trading days within a 30-trading day period. Additionally, the Public Warrants may be redeemed if the last reported trading price of the Company's Class A Common Stock equals or exceeds $10.00 and is below $18.00 by paying a make-whole premium. The Public Warrants expire 5 years after the Closing Date.

•The Company recorded 10,900,000 Private Placement Warrants, which are exercisable for 10,900,000 shares of Class A Common Stock at a price of $11.50 per share. The Private Placement Warrants expire 5 years after the Closing Date. The Private Placement Warrants are exercisable on a cashless basis and are non-redeemable as long as they are held by the initial purchasers or their permitted transferees. The Private Placement Warrants and Class A Common Stock issuable upon exercise of the Private Placement Warrants are entitled to registration rights.

•The Company recorded $71,459 of deferred tax liabilities, which represent the difference between NET Power Inc.’s tax basis and its US GAAP basis in OpCo, with an offsetting entry to goodwill. The basis difference is primarily attributable to the Company's developed technology and its Demonstration Plant asset.

•The Company received $661,623 of cash from trust net of certain expenses paid on the Closing Date. During the period from July 1, 2023 through September 30, 2023 (Successor) this cash earned $10,800 in interest revenue, which is reported as interest revenue on the Consolidated Statements of Operations and Comprehensive Loss.

The Business Combination was accounted for using the acquisition method of accounting. The fair value of the total purchase consideration transferred was $1,786,259. The following table summarizes the total consideration transferred in the Business Combination:

Consideration Transferred	Total
Pre-combination vesting of modified profits interests	$	325
Pre-combination vesting of unmodified profits interests	651
Consideration Transferred to Sellers	976
Class A OpCo Units - non-controlling interests	1,785,283
Fair value of total consideration transferred	$	1,786,259

The following table sets forth the fair value of the assets and liabilities assumed in connection with the Business Combination:

	Total
Assets Acquired
Current Assets
Cash	$	7,946
Prepaid expenses	637
Other current assets	30
Total Current Assets	8,613
Long Term Assets
Intangible assets, net	1,345,000
Property, plant and equipment	91,855
Right-of-use assets	940
Total Long Term Assets	1,437,795
Total Assets Acquired	$	1,446,408
Liabilities Assumed
Current Liabilities
Accounts payable	2,574
Accrued liabilities	7,370
Current lease liability	137
Other current liabilities	1
Total Current Liabilities	10,082
Long Term Liabilities
Deferred tax liability	71,459
Asset retirement obligation	1,967
Long term lease liability	594
Total Long Term Liabilities	74,020
Total Liabilities Assumed	84,102
Total identifiable net assets	1,362,306
Goodwill	423,953
Net assets acquired	$	1,786,259

The purchase price allocation is subject to change during the measurement period, which will expire one year from the acquisition date.

Pro-Forma Information - The following table presents pro forma information as if the Business Combination occurred as of January 1, 2022. The pro forma information reflects adjustments for additional amortization resulting from the fair value re-measurement of assets acquired and liabilities assumed, for alignment of accounting policies, and transaction expenses as if the Business Combination occurred on January 1, 2022. The pro forma results do not include any anticipated cost synergies or other effects of the combined Company. Accordingly, pro forma amounts are not necessarily indicative of the results that actually would have occurred had the Business Combination been completed on the date indicated, nor are they indicative of the Company's future operating results.

	Three Months Ended				Nine Months Ended
	September 30, 2023		September 30, 2022		September 30, 2023		September 30, 2022
Pro forma revenue	$	125	$	208	$	175	$	574
Pro forma net loss	(91,966)		(28,964)		(266,123)		(87,558)
Pro forma net loss attributable to non-redeemable controlling interest	(29,981)		(9,442)		(86,756)		(28,544)
Pro forma net loss attributable to non-redeemable non-controlling interests	(61,985)		(19,522)		(179,367)		(59,014)

XML

Intangible Assets

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

Goodwill - Goodwill represents the future economic benefits derived from the Company’s unique market position, the growth attributable to the NET Power Cycle and the Company's assembled workforce, none of which are individually and separately recognized as intangible assets. Goodwill is allocated to the Company's sole reportable segment and reporting unit.

The following table presents the Company's goodwill balance as of September 30, 2023 (Successor):

	Goodwill
Goodwill at June 30, 2023 (Successor)	$	433,736
Measurement Adjustments	(9,783)
Goodwill at September 30, 2023 (Successor)	$	423,953

Current period measurement adjustments of $9,783 reflect the effects of changes to deferred tax liability estimates calculated as part of the purchase price allocation that accompanied the Business Combination (Note C).

Definite Lived Intangible Assets - The following tables present the Company's definite lived intangible assets as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor) are as follows:

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Developed Technology, gross	$	1,345,000	$	604
Accumulated Amortization	(20,922)		(341)
Developed Technology, net	$	1,324,078	$	263

Amortization expense for the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through September 30, 2023 (Successor) was $10 and $20,922, respectively. Amortization expense for the three month and nine month periods ended September 30, 2022 (Predecessor) was $5 and $16, respectively. Periodic amortization expense excludes goodwill, which is not amortized. The Company does not own or control any intangible

assets with indefinite useful lives except goodwill. The Company's goodwill is not tax deductible. The following table presents estimated amortization expense for future periods and future years ending December 31:

	Future Amortization Expense
2023	$	16,813
2024	67,250
2025	67,250
2026	67,250
2027	67,250
2028 and thereafter	1,038,265
Total	$	1,324,078

XML

Property, Plant, and Equipment

9 Months Ended

Sep. 30, 2023

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

The following table summarizes the key classifications of property, plant and equipment as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor):

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Furniture and Equipment, gross	$	253	$	368
Accumulated Depreciation	(17)		(216)
Furniture and Equipment, net	236		152
Demonstration Plant, gross	89,240		128,013
Accumulated Depreciation	(3,955)		(58,570)
Demonstration Plant, net	85,285		69,443
Construction in Progress	6,237		—
Total Property, Plant and Equipment, net	$	91,758	$	69,595

Depreciation expense for the period from January 1, 2023 through June 7, 2023 (Predecessor), the period from June 8, 2023 through September 30, 2023 (Successor) and the period from July 1, 2023 through September 30, 2023 was $5,700, $3,972 and $3,173, respectively. Depreciation expense for the three month and nine month periods ended September 30, 2022 (Predecessor) was $3,266 and $9,797, respectively.

Asset Retirement Obligation - The following table disaggregates the contents of the Company's asset retirement obligation included in Property, Plant and equipment, net on the Consolidated Balance Sheets as of December 31, 2022 (Predecessor):

	December 31, 2022 (Predecessor)
Asset Retirement Obligation, gross	$	2,201
Accumulated Depreciation	(348)
Asset Retirement Obligation, net	$	1,853

XML

Accrued Liabilities

9 Months Ended

Sep. 30, 2023

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued Liabilities

Accrued liabilities as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor) are as follows:

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Accrued Incentive Compensation	$	1,023	$	1,451
Accrued cash-based expense of Original JDA and Amended and Restated JDA	2,748		—
Accrued Legal Service Provider Fees	1,731		645
Other Accrued Liabilities	1,929		296
Total Accrued Liabilities	$	7,431	$	2,392

XML

Trade Receivables and Allowance for Doubtful Accounts

9 Months Ended

Sep. 30, 2023

Receivables [Abstract]

Trade Receivables and Allowance for Doubtful Accounts

Trade Receivables and Allowance for Doubtful Accounts

Trade receivables, net as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor) comprise the following balances:

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Trade Receivables, gross	$	—	$	352
Allowance for Doubtful Accounts	—		—
Trade Receivables, net	$	—	$	352

During the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through September 30, 2023 (Successor), the Company recorded bad debt expense associated with its allowance for doubtful accounts equal to $352 and $0 within General and administrative on the Consolidated Statement of Operations and Comprehensive Loss, respectively. During the three month and nine month periods ended September 30, 2022 (Predecessor), the Company recorded bad debt expense associated with its allowance for doubtful accounts equal to $0 and $0 within General and administrative on the Consolidated Statement of Operations and Comprehensive Loss, respectively.

XML

Related Party Transactions

9 Months Ended

Sep. 30, 2023

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

Related Party Transactions - The Company had $288 and $178 in current liabilities payable to related parties as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor), respectively. These related party payables are unsecured and are due on demand.

The Company had $0 and $2,212 in long term liabilities payable to related parties as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor), respectively.

Share Purchase Option - One of the Company’s shareholders owned an option to purchase up to 711,111 membership interests from NET Power, LLC if NET Power, LLC met certain performance conditions, which it did not achieve prior to the close of the Business Combination. Immediately prior to the close of the Business Combination (Note C), the option holder received 247,655 NET Power, LLC membership interests worth approximately $79,054 in exchange for retiring the purchase option. The membership interests converted into 7,905,279 Class A OpCo Units and a corresponding quantity of shares of Class B Common Stock in conjunction with the Business Combination. The loss generated from the settlement of the share purchase option is recorded as Option settlement - related party expense on the Consolidated Statements of Operations and Comprehensive Loss.

MSA – A significant shareholder has provided the Company with marketing services, patent administration services and technology maintenance services related to the development of the NET Power Cycle. The total cost incurred for these services was $79 and $51 during the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through September 30, 2023 (Successor), respectively. The total cost incurred for these services was $47 and $183 during the three month and nine month periods ended September 30, 2022 (Predecessor), respectively. These totals are included in General and administrative - related party on the Consolidated Statements of Operations and Comprehensive Loss.

Another shareholder supports the Company with regard to general business oversight and with the operation of the Demonstration Plant. The total cost incurred for these services was $530 and $433 during the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through September 30, 2023 (Successor), respectively. The total cost incurred for these services was $184 and $790 during the three month and nine month periods ended September 30, 2022 (Predecessor), respectively. These totals are reflected in Research and development - related party on the Consolidated Statements of Operations and Comprehensive Loss.

XML

Fair Value Measurement

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurement

Fair Value Measurement

The following table presents information about the Company’s liabilities that are measured at fair value on a recurring basis as of September 30, 2023 (Successor) and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine each asset's and each liability's fair value:

Assets	Level 1		Level 2		Level 3		Total
Short-term Investments	$	—	$	100,000	$	—	$	100,000
Total	$	—	$	100,000	$	—	$	100,000
Liabilities	Level 1		Level 2		Level 3		Total
Public Warrants	$	37,420	$	—	$	—	$	37,420
Private Placement Warrants	—		—		103,114		103,114
Earnout Shares	—		—		4,546		4,546
Total	$	37,420	$	—	$	107,660	$	145,080

The following table presents information about the Company’s liabilities that were measured at fair value on a recurring basis as of December 31, 2022 (Predecessor) and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine each liability's fair value:

Liabilities	Level 1		Level 2		Level 3		Total
Option Liability	$	—	$	—	$	5,174	$	5,174
Total	$	—	$	—	$	5,174	$	5,174

The following table presents a reconciliation of the beginning and ending balances of recurring level 3 fair value measurements:

	July 1 – September 30, 2023 (Successor)		July 1 – September 30, 2022 (Predecessor)		June 8 – September 30, 2023 (Successor)		January 1 – June 7, 2023 (Predecessor)		January 1 - September 30, 2022 (Predecessor)
Balance of recurring level 3 liabilities at beginning of period	$	63,187	$	1,854	$	63,851	$	5,174	$	1,459
Total gains and losses during the period included in    Other Income (Expense)	52,352		—		51,688		—		395
Issuances	(7,879)		—		(7,879)		—		—
Payments	—		—		—		(5,174)		—
Transfers into level 3	—		—		—		—		—
Transfers out of level 3	—		—		—		—		—
Balance of recurring level 3 liabilities at end of period	$	107,660	$	1,854	$	107,660	$	—	$	1,854

Earnout Shares - The fair values for the Earnout Shares are estimated using a Monte Carlo simulation. The Monte Carlo simulation considers daily simulated stock prices as a proxy for the Company's daily volume-weighted average share price. The key inputs into the valuation of the Earnout Shares are an expected term of 3 years, a risk-free rate of 4.8% and estimated equity volatility of 62.5%. The estimated equity volatility assumption is based on a blended average of asset and equity volatility measurements of publicly traded companies within the Company's peer group.

Warrants - The Public Warrants are valued using their quoted and publicly available market prices. Since their fair value is predicated on quoted prices in an active market for identical instruments, the Public Warrants are considered to be Level 1 fair value instruments because their price is observable.

The Company uses a Black-Scholes Merton Model to value the Private Placement Warrants. Key inputs into the Black-Scholes Merton Model include the Class A Common Stock closing price of $15.10 as of September 30, 2023 (Successor), the risk free rate of 4.5%, volatility of 64.0%, a term of 5 years and a strike price of $11.50 per share. The volatility assumption is based on a blended average of operating and equity volatility of publicly traded companies within the Company's peer group.The Private Placement Warrants are considered to be Level 3 fair value instruments because they are not traded on public markets; therefore, their price is not observable.

Short-term Investments - Short-term investments are valued at cost, which approximates fair value. Short-term investments are considered Level 2 fair value instruments because cost basis is not observable in a public market.

Option Liability - The Company’s option liability was issued in conjunction with member loans authorized on October 15, 2021. The loans were fully repaid on February 3, 2022. The interest expense related to these loans equaled $30 and $0 during the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through September 30, 2023 (Successor), respectively. These measurements were reported in Interest income (expense) on the Consolidated Statements of Operations and Comprehensive Loss. On January 11, 2023, an option holder exercised its option to purchase membership interests associated with the member loan agreement. On February 3, 2023, another option holder also exercised its option to purchase membership interests associated with the member loan agreement. The Company issued 5,824 and 28,764 membership interests to the two option holders, respectively, and received an aggregate of $5,836 from the exercise of the options. No loan options are currently outstanding.

XML

Net Loss per Share and Net Loss per Unit

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Net Loss per Share and Net Loss per Unit

Net Loss per Share and Net Loss per Unit

Successor Period – Basic net loss per share is computed based on the weighted average number of shares of Class A Common Stock outstanding. Diluted net income per share is computed based on the weighted average number of shares of Class A Common Stock outstanding, increased by the number of any additional shares of Class A Common Stock that would have been outstanding had any potentially dilutive shares of Class A Common Stock been issued and reduced by the number of shares of Class A Common Stock the Company could have repurchased from the proceeds from issuance of the potentially dilutive shares.

For the purposes of the diluted earnings per share calculation, Warrants, Earnout Shares, BHES Bonus Shares (as defiend below) (Note L), unvested Class A OpCo Units and the potential conversion of vested OpCo Units are excluded from the net loss per share calculation for the period from June 8, 2023 through September 30, 2023 (Successor) because their inclusion would be anti-dilutive due to the losses reported in the Successor Period. Additionally, Earnout Shares and BHES Bonus Shares are excluded from the net loss calculation because the contingencies that would allow for those Earnout Shares to vest into OpCo Units have not yet been met. Based on the amounts outstanding at September 30, 2023 (Successor), the Company excluded the following financial instruments from the computation of diluted net loss per unit because their inclusion would be anti-dilutive due to the losses reported in the Successor Period:

Anti-Dilutive Instrument	September 30, 2023 (Successor)
Public Warrants	8,622,235
Private Placement Warrants	10,900,000
Earnout Shares	328,925
BHES Bonus Shares	2,068,416
Unvested Class A OpCo Units	972,522
Vested Class A OpCo Units	140,747,943
Unvested RSU's	440,423
Total	164,080,464

Only shares of Class A Common Stock participate in the Company’s undistributed earnings. As such, the Company’s undistributed earnings are allocated entirely to the Class A Common Stock based on the weighted-average number of shares of Class A Common Stock outstanding for the period from June 8, 2023 through September 30, 2023 (Successor).

The following table sets forth the computation of the Company’s basic and diluted net loss per share for the period from June 8, 2023 through September 30, 2023 (Successor):

	Class A
Numerator
Net loss	$	(202,551)
Net loss attributable to shareholders	$	(65,564)
Denominator
Weighted-average number shares outstanding, basic and diluted	68,644,032
Net loss per share attributable to shareholders, basic and diluted	$	(0.96)

Predecessor Period – Basic net loss per unit is computed based on the weighted average number of membership interests outstanding. Diluted net loss per unit is computed based on the weighted average number of membership interests outstanding, increased by the number of any additional units that would have been outstanding had any potentially dilutive membership interests been issued and decreased by the number of membership interests the Company could have repurchased from the proceeds from issuance of the potentially dilutive membership interests.

As of September 30, 2022 (Predecessor), the Company’s potentially dilutive securities were profits interests, member loan share options and share options. Based on the amounts outstanding at September 30, 2022 (Predecessor), the Company excluded the following potential membership interests from the computation of diluted net loss per unit because their inclusion would be anti-dilutive due to the losses reported in the Predecessor Period:

Anti-Dilutive Instrument	September 30, 2022 (Predecessor)
Profits Interests	450,013
Member Loan Share Options	34,588
Occidental Petroleum Share Options	711,111
Total	1,195,712

The following table sets forth the computation of the Company’s basic and diluted net loss per unit for the three month and nine month periods ended September 30, 2022 (Predecessor) and for the period from January 1, 2023 through June 7, 2023 (Predecessor), respectively:

	Period from July 1 - September 30, 2023 (Successor)		Three Months Ended September 30, 2022 (Predecessor)		Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)		Nine Months Ended September 30, 2022 (Predecessor)
Numerator
Net loss	$	(30,564)	$	(12,220)	$	(65,564)	$	(34,176)	$	(37,335)
Net loss attributable to membership interest holders	$	(30,564)	$	(12,220)	$	(65,564)	$	(34,176)	$	(37,335)
Denominator
Weighted-average number membership interests outstanding, basic and diluted	68,966,972		1,143,430		68,644,032		3,766,871		2,838,388
Net loss per unit attributable to membership interest holders, basic and diluted	$	(0.44)	$	(10.69)	$	(0.96)	$	(9.07)	$	(13.15)

XML

Shareholders' Equity, Non-Controlling Interest and Members' Equity

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Shareholders' Equity, Non-Controlling Interest and Members' Equity

Shareholders’ Equity, Non-Controlling Interest and Members’ Equity

Successor Period - The Company’s equity consists of a total of 831,000,000 authorized shares across all classes of capital stock, which the Company has the authority to issue. The 831,000,000 authorized shares consist of 1,000,000 authorized shares of Preferred Stock with a par value of $0.0001 per share, 520,000,000 authorized shares of Class A Common Stock with a par value of $0.0001 per share, and 310,000,000 shares of Class B Common Stock with a par value of $0.0001 per share.

As of September 30, 2023 (Successor), the Company had no outstanding shares of Preferred Stock, 71,014,190 outstanding shares of Class A Common Stock, and 141,529,513 outstanding shares of Class B Common Stock.

The table below demonstrates the calculation of net loss before income tax attributable to redeemable non-controlling interest holders for the July 1, 2023 through September 30, 2023 (Successor) period and the June 8, 2023 through September 30, 2023 (Successor) period:

	Period from July 1 - September 30, 2023 (Successor)			Period from June 8 - September 30, 2023 (Successor)
Net Loss before Income Tax	$	(91,976)		$	(203,232)
Redeemable non-controlling interest percentage - Class A OpCo Units	67.4		%	67.3		%
Net Loss before Income Tax attributable to Class A OpCo Units	$	(61,402)		$	(136,987)

On August 16, 2023, pursuant to the OpCo limited liability company agreement, all Class B OpCo Units converted into Class A OpCo Units on a one-for-one basis due to the exercise on such date by an OpCo Unitholder of its Class B OpCo Unit conversion right, which allowed the holder to convert its own Class B OpCo Units into Class A OpCo Units on a one-for-one basis.

During the three months ended September 30, 2023, the Company's Class A Common Stock achieved the $12.00 per share and $14.00 per share prices necessary to cause two-thirds of the Earnout Shares to vest and to remove the lock-up provision from two-thirds of the Price-Based Lock-Up Shares. As of September 30, 2023, 328,925 Class A OpCo units and a corresponding number of shares of Class B Common Stock included in the Earnout Shares remain unvested. Additionally, as of September 30, 2023, 14,848,184 Price-Based Lockup Shares remain restricted.

As of September 30, 2023, redeemable non-controlling interests are comprised of 140,228,066 vested Class A OpCo Units, of which 6,967,050 units were formerly vested Class B OpCo Units. Class A OpCo Units are exchangeable for shares of Class A Common Stock or redeemable for cash. Additionally, the Company holds a call right that enables it to redeem Class A OpCo Units for shares of Class A Common Stock or cash once the unit holder has elected to redeem the equity instrument.

Predecessor Period – The Company’s equity in the Predecessor Period comprised a single class of membership interests. The Company’s members’ equity as of September 30, 2022 (Predecessor) included 4,987,845 authorized membership interests, of which 3,718,931 were issued and outstanding.

Due to the absence of an active market for the Company’s membership interests, the Company utilized methodologies in accordance with the framework of the American Institute of Certified Public Accountants Technical Practice Aid - Valuation of Privately-Held Company Equity Securities Issued as Compensation to estimate the fair value of its membership interests. The estimated fair value of the membership interests was determined at each grant date based upon a variety of factors, including price of equity issuances by the Company, the Company’s financial position, historical financial performance, the Company’s developed, external market conditions affecting any trends within the industry and the likelihood of achieving a liquidity event.

XML

Share-Based Payments

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Share-Based Payments

Share-Based Payments OpCo Unit Awards - As of September 30, 2023 (Successor), there was $3,300 of unrecognized share-based compensation expense related to unvested Class A OpCo Units granted under previous programs, which the Company expects to recognize over a weighted average period of 3 years.

As of December 31, 2022 (Predecessor), there was $9,312 of unrecognized share-based compensation expense related to unvested equity awards granted under previous programs, which the Company expects to recognize over a weighted average period of 1 year.

The following table presents a summary of employee equity awards comprised of Class A OpCo Units and a corresponding quantity of shares of Class B Common Stock outstanding, granted, forfeited, vested on an accelerated basis and redeemed during the current year-to-date:

	Quantity		Calculated Value
	Period from June 8 - September 30, 2023 (Successor)	Period from January 1 - June 7, 2023 (Predecessor)	Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)
Unvested, beginning of period	1,895,122	226,494	$	4.95	$	63.25
Granted	—	—	$	—	$	—
Forfeited	(324,568)	—	$	5.66	$	—
Vested	—	(107,418)	$	—	$	63.18
Accelerated	(598,032)	—	$	4.32	$	—
Unvested, end of period	972,522	119,076	$	4.45	$	63.32

Omnibus Incentive Plan and RSU's - In conjunction with the Business Combination, the Company's board of directors and RONI's shareholders approved the 2023 Omnibus Incentive Plan. The 2023 Omnibus Incentive Plan initially reserves 20,468,545 shares of Class A Common Stock for issuance as equity awards. The quantity of shares of Class A Common Stock reserved for grant under the 2023 Omnibus Incentive Plan will be subject to an annual increase on the first day of each calendar year beginning January 1, 2024, and ending and including January 1, 2033, equal to the lesser of (i) 5% of the aggregate number of shares outstanding on December 31 of the immediately preceding calendar year and (ii) any such smaller number of shares as is determined by the Board.

During the period from July 1, 2023 through September 30, 2023 (Successor), the Company authorized the issuance of 440,424 RSU's to its executive employees, non-executive employees and non-employee independent directors under the terms of the Omnibus Incentive Plan. As of September 30, 2023 (Successor), there was $5,491 of unrecognized share-based compensation expense related to unvested RSU's, which the Company expects to recognize over a weighted average period of 3 years

The following table presents a summary of RSU's outstanding, granted, forfeited, vested on an accelerated basis and redeemed during the current year-to-date:

	Quantity		Fair Value
	Period from June 8 - September 30, 2023 (Successor)	Period from January 1 - June 7, 2023 (Predecessor)	Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)
Unvested, beginning of period	—	—	$	—	$	—
Granted	440,424	—	$	13.43	$	—
Forfeited	—	—	$	—	$	—
Vested	—	—	$	—	$	—
Accelerated	—	—	$	—	$	—
Unvested, end of period	440,424	—	$	13.43	$	—

Awards granted to employees and the majority of executives cliff-vest at the end of the grant's three-year anniversary date. Awards granted to independent directors and certain executives use a graded vesting schedule over the three-year period that begins on each award's grant date.

Replacement Awards - Pursuant to the Business Combination Agreement (Note C), the Company agreed to amend the settlement provisions of certain unvested, outstanding profits interests previously issued by NET Power, LLC (the “Replacement Awards”). Unvested Replacement Awards that would have originally settled into NET Power, LLC membership interests will now settle into Class A OpCo Units and a corresponding number of shares of Class B Common Stock. The number of Class A OpCo Units and shares of Class B Common Stock into which the Replacement Awards will settle is calculated so that the settlement value approximates the value of NET Power, LLC membership interests into which the profits interests would have settled. The Replacement Awards will continue to vest over the original applicable service periods and are subject to the same performance conditions as the profits interests.

Accelerated Vesting & Forfeiture of Certain Profits Interests - Also pursuant to the Business Combination Agreement, the Company agreed to accelerate the vesting of certain unvested profits interests upon completion of the Business Combination. The Business Combination resulted in the immediate vesting of 30,000 profits interests, which equated to 451,356 Class A OpCo Units and a corresponding number of shares of Class B Common Stock, that generated $1,624 in compensation cost, which was directly attributed to the transaction on June 8, 2023. The expense generated by the accelerated vesting of certain profits interests is recorded in General and administrative - related party within the June 8 through September 30, 2023 (Successor) period of the Consolidated Statements of Operations and Comprehensive Loss.

Additionally, the Business Combination resulted in the forfeiture of 30,000 unvested profits interests, which equated to 324,625 Class A OpCo Units and a corresponding number of shares of Class B Common Stock. This forfeiture did not affect the compensation expense recorded in the Consolidated Statements of Operations and Comprehensive Loss because the awards were unvested at the time of forfeiture.

JDA - The following table presents the quantity and value of equity issued to BHES as payment for costs incurred pursuant to the Original JDA and the Amended & Restated JDA (Note N). The portion of Original JDA and Amended and Restated JDA costs that the Company pays with Class A OpCo Units and shares of Class B Common Stock is recorded within additional paid in capital on the Consolidated Balance Sheets and the Consolidated Statement of Shareholders' Equity and Non-Controlling Interest. The Equivalent Value per Unit displays the discounted price per membership interest or per share stipulated in the Original JDA and the Amended and Restated JDA. The Total Fair Value columns display the fair value of shares distributed as payment for services rendered by BHES under the terms of the Original JDA and the Amended and Restated JDA.

	Quantity		Total Fair Value
	Period from June 8 - September 30, 2023 (Successor)	Period from January 1 - June 7, 2023 (Predecessor)	Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)		Equivalent Value per Unit or per Share
Membership Interests	—	9,210	$	—	$	1,943	$	168.75
Class A OpCo Units	542,324	296,160	3,585		1,958		$	5.29
Class B Common Stock	542,324	296,160	—		—		$	—
Total			$	3,585	$	3,901

Shares used as payment under the terms of the Amended and Restated JDA are issued at a discount expected to cause a total loss of approximately $17,500 to the Company. The Company has incurred inception-to-date losses of $2,053 related to such issuances.

BHES may earn additional shares under the terms of the Amended and Restated JDA ("BHES Bonus Shares") if it meets certain contractually stipulated project milestones related to the development of the Demonstration Plant. The Company determined that BHES's achievement of each of these milestones is probable in accordance with ASC 718's guidance; therefore, the Company recognizes the compensation cost associated with milestone share-based payments ratably over the expected service period. The following table disaggregates the variable compensation payable to BHES should it meet its milestone objectives:

	Performance Period End Date	Compensation Cost Incurred To Date		Remaining Compensation Cost		Total Compensation Cost
JDA - variable share-based payments	January, 2027	$	20,557	$	6,788	$	27,345

Additionally, BHES received 47,000 membership interests that converted into 1,500,265 Class A OpCo Units and a corresponding number of shares of Class B Common Stock in conjunction with the consummation of the Business Combination (Note C).Reference Note N for additional quantitative disclosures related to the Original JDA and the Amended and Restated JDA

XML

Leases

9 Months Ended

Sep. 30, 2023

Leases [Abstract]

Leases

Leases

Office Lease - On June 6, 2022, the Company entered into an office space lease agreement (the "Measurement Building Lease"), which became effective on November 1, 2022 and used an original lease term of 60 months from the signing date. The lease is classified as an operating lease and the lease liability was calculated using an incremental borrowing rate of 8.0%. On August 11, 2023, the Company agreed to terminate the Measurement Building Lease, effective October 6, 2023, and entered into a new office lease agreement (the "Roney St. Lease"). The Roney St. Lease began on October 6, 2023 and lasts for a term of 62 months from the commencement date. The simultaneous termination of the Measurement Building Lease and execution of the Roney St. Lease represents a single transaction accounted for as a modification of the Measurement Building Lease under the requirements of ASC 842. As such, the Company re-measured the lease liabilities and right of use asset associated with the Measurement Building Lease and recognized those balances over the amended, remaining lease term.

As of September 30, 2023, the Company had $3 in lease liabilities and $3 in right-of-use assets attributable to the Measurement Building Lease on its Consolidated Balance Sheets. After the Measurement Building Lease modification, the Company does not expect to incur lease payments related to that agreement during future reporting periods.

Land Lease - The Company leases the land under the Demonstration Plant. The lease expires on the earlier of (i) July 1, 2025 or (ii) the termination of the Company’s oxygen supply agreement with the lessor, which also serves as a supplier to the Company. Lease payments for the land equal one dollar per year.

In conjunction with the Business Combination Agreement (Note C), the Company revalued its land lease at its fair value, which involved a comparison of the land lease's terms against comparable market lease terms. Based on this comparison, the Company recorded $210 of right-of-use assets on the Consolidated Balance Sheets related to the favorable terms of its Demonstration Plant land lease.

XML

Commitments and Contingencies

9 Months Ended

Sep. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Litigation - In conjunction with the Business Combination (Note C), the Company entered into a settlement agreement with a RONI shareholder related to certain disclosures made in the registration statement filed by RONI for the Business Combination. The settlement amount did not have a material effect on the Consolidated Balance Sheets of the Company.

Asset Retirement Obligation - The Company’s valuation of the asset retirement obligation related to the Demonstration Plant encompasses an estimate for the cost to restore the site as required by lease terms.

The following table reconciles the beginning value of the Company's asset retirement obligation liability to its ending balance for each period presented in the Consolidated Statements of Operations and Comprehensive Loss:

	Period from July 1 – September 30, 2023 (Successor)		Three Months Ended September 30, 2022 (Predecessor)		Period from June 8 – September 30, 2023 (Successor)		Period from January 1 – June 7, 2023 (Predecessor)		Nine Months Ended September 30, 2022 (Predecessor)
Asset retirement obligation, beginning of period	$	1,977	$	2,308	$	1,977	$	2,416	$	—
Obligation incurred	—		—		—		—		2,201
Periodic accretion expense	41		54		41		102		161
Asset retirement obligation, end of period	$	2,018	$	2,362	$	2,018	$	2,518	$	2,362

Unconditional Purchase Obligations - The Company has committed to purchase industrial components for installation at its Demonstration Plant. The Company pays for these components in installments related to contractual milestones specified by the counterparty. In accordance with ASC Topic 440 - Commitments ("ASC 440"), the Company does not recognize the commitment on its Consolidated Balance Sheets. Upon invoicing, the Company reclassifies current period

installment payments to accounts payable and proportionally increases its construction in progress account. The Company expects to recognize the gross value of its existing asset purchase commitments during the current fiscal year.

The following table presents the Company’s material, unrecognized purchase obligations:

Commitment	Consideration Type	Gross Commitment		Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)		Prior Predecessor Periods		Remaining Commitment
Asset Purchase Commitment	Cash	$	4,700	$	—	$	1,168	$	—	$	3,532
Original JDA and Amended and Restated JDA	Cash	70,000		2,867		3,121		2,211		61,801
Original JDA and Amended and Restated JDA	Share-Based	70,000		3,585		3,902		2,765		59,748
	Total	$	144,700	$	6,452	$	8,191	$	4,976	$	125,081

JDA - On February 3, 2022, the Company entered into the Original JDA with affiliates of Baker Hughes Energy Services LLC, which is a shareholder (collectively “BHES”). The Original JDA's counterparties subsequently amended the agreement's terms on June 30, 2022 and December 13, 2022 (the "Amended and Restated JDA"). The Amended and Restated JDA represents a contract that engages BHES to invest in, develop and deploy the NET Power Cycle in collaboration with the Company. The Amended and Restated JDA entitles BHES to payments of cash and equity in exchange for services related to the development and commercialization of the technology. Expenses incurred under the terms of the Amended and Restated JDA are invoiced quarterly. The Company records the measurement of services provided by BHES within Research and development on the Consolidated Statement of Operations and Comprehensive Loss.

The Company does not recognize the commitment related to the Amended and Restated JDA on its balance sheet in accordance with ASC 440's guidance. Upon receipt of an invoice, the Company accrues for the current period billing in Accounts payable and records the related operating expense and compensation expense. The Company expects to recognize the gross value of its commitments under the Amended and Restated JDA by January, 2027.

Prior to the Business Combination, the Company used membership interests to compensate BHES for its services under the Amended and Restated JDA (Note L). After the Business Combination, the Company uses Class A OpCo Units and corresponding quantities of Class B Common Stock to compensate BHES for its services under the Amended and Restated JDA (Note L).

The following table presents the costs associated with the JDA's:

	Period from				Period from
	July 1 – September 30, 2023 (Successor)		July 1 – September 30, 2022 (Predecessor)		June 8 – September 30, 2023 (Successor)		January 1 – June 7, 2023 (Predecessor)		January 1 – September 30, 2022 (Predecessor)
Cash expense	$	2,748	$	578	$	2,867	$	3,121	$	1,256
Plus: Membership Interests Issued	—		723		—		3,902		6,934
Plus: Class A OpCo Units Issued	3,436		—		3,585		—		—
Plus: BHES Bonus Share expense	819		2,688		6,010		4,690		1,570
Total research and development attributable to JDA	$	7,003	$	3,989	$	12,462	$	11,713	$	9,760

Prior to June 8, 2023 (Successor), the Company recorded costs incurred under the Amended and Restated JDA within Research and development - related party on the Consolidated Statement of Operations and Comprehensive Loss because an affiliate of BHES served on the Company's Board of Directors. Subsequent to the Business Combination, neither BHES nor its affiliates occupy seats on the Company's Board of Directors; therefore, BHES no longer qualifies as a related party.

XML

Income Taxes

9 Months Ended

Sep. 30, 2023

Income Tax Disclosure [Abstract]

Income Taxes

Income TaxesPrior to the Closing Date, NET Power, LLC represented a pass-through entity for state and federal income tax consideration, which passed through its income or loss to its partners; therefore, it did not record income tax (benefit)

expense. The following table presents the Company’s Income tax (benefit) expense and the effective income tax rate during the period from June 8 through September 30, 2023 (Successor):

	June 8 - September 30, 2023 (Successor)
Income tax expense (benefit)	$	(681)
Effective tax rate	0.3		%

The provision for income taxes differs from the amount of income tax computed by applying the U.S. statutory federal tax rate of 21.0% to the loss before income taxes due to income (loss) from non-taxable pass-through entities related to non-controlling interests, non-deductible expenses, outside basis adjustments and the valuation allowance placed against deferred tax assets.

Tax Receivable Agreement - As of September 30, 2023 (Successor), the Company recorded a liability of $9,376 related to its projected obligations under the TRA, which is recorded as TRA Liability in the Company’s Consolidated Balance Sheets. This obligation arose because of qualifying exchanges of Class A OpCo Units that occurred during the period from July 1, 2023 through September 30, 2023 (Successor).

XML

Subsequent Events	9 Months Ended
	Sep. 30, 2023
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn October 6, 2023, the Company formally relocated to the office space governed by the Roney St. Lease. As of October 6, 2023, the lease liability affiliated with the Roney St. Lease equaled $2,168 and the right of use asset affiliated with the Roney St. Lease equaled $2,144. Future minimum lease expenses attributable to the Roney St. Lease are expected to total $2,623 over the lease term.

XML

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Comprehensive Loss	$ (30,564)	$ (12,220)	$ (65,564)	$ (34,176)	$ (37,335)

XML

Basis of Presentation and Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation - The accompanying unaudited consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America ("US GAAP") and include some amounts that are based upon management estimates and judgments. In the Company's opinion, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly the Company's financial position, results of operations and cash flows for the periods presented. Such adjustments consist solely of normal, recurring adjustments.

Recently Issued Accounting Standards

Recently Issued Accounting Standards - During October, 2023, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") 2023-06 - Disclosure Improvements: Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative ("ASU 2023-06"). ASU 2023-06 incorporates 14 of the 27 disclosure requirements published in SEC Release No. 33-10532 - Disclosure Update and Simplification into various topics within the Accounting Standards Codification ("ASC"). ASU 2023-06's amendments represent clarifications to, or technical corrections of, current requirements. For SEC registrants, the effective date for each amendment will be the date on which the SEC removes that related disclosure from its rules. Early adoption is prohibited. The Company does not expect ASU 2023-06 to have a material effect on its financial statements.

Principles of Consolidation

Principles of Consolidation – The Consolidated Balance Sheets and Consolidated Statements of Operations and Comprehensive Loss include the accounts of subsidiaries that NET Power Inc. consolidates according to the rules set forth in ASC Topic 810 – Consolidation (“ASC 810”). The Company consolidates all subsidiaries in which it owns a 50.0% or greater ownership interest and all variable interest entities ("VIE's") to which it is deemed to represent the primary beneficiary, as described below. The Consolidated Balance Sheets and the Consolidated Statement of Operations and Comprehensive Loss include the accounts of the following wholly-owned subsidiaries and consolidated VIE's: NET Power Europe LTD (“NP Europe”); NET Power Friendship 7, LLC; NET Power Technology, LLC; NET Power Atlas, LLC; NET Power Canaveral, LLC; NET Power Services, LLC, NET Power Management Holdings Inc.; NET Power Management LLC; NET Power Operations LLC ("OpCo"); NET Power Intermediate LLC and NET Power, LLC. Intercompany balances have been eliminated through the consolidation process.

ASC 810 requires that a reporting entity that possesses a controlling financial interest in a VIE consolidate that VIE. A controlling financial interest will have both of the following characteristics: (a) the power to direct the activities that most significantly impact the VIE's economic performance; and (b) the obligation to absorb the VIE's losses and the right to receive benefits that are significant to the VIE. The Company determined that NET Power Operations LLC meets the definition of a VIE and that the Company became the primary beneficiary of it beginning on the Closing Date of the

Business Combination (Note C); therefore, the Company has consolidated NET Power Operations LLC from the date of the Business Combination.

Business Combination

Business Combination – The Company applies the guidance within ASC Topic 805 – Business Combinations ("ASC 805") to all merger and acquisition transactions, including the Business Combination (Note C), through which the Company obtains control over one or more other businesses.

The Company may elect the acquisition method for all transactions and other events through which the Company obtains control over one or more other businesses, including the Business Combination (Note C). Under the acquisition method, assets acquired and liabilities assumed are measured at fair value as of the acquisition date. Liabilities related to contingent consideration are recognized on the acquisition date and re-measured at fair value in each subsequent reporting period, if the contingent consideration is liability classified. Goodwill is recognized as the excess of the consideration transferred over the fair value of the net identifiable assets acquired.

Segment Reporting

Segment Reporting - In accordance with ASC Topic 280 – Segment Reporting, the Company has one operating segment and one reportable segment. The Company has one line of business.

Revenue Recognition

Revenue Recognition, Trade Receivables and Allowance for Doubtful Accounts – The Company follows the guidance within ASC Topic 606 – Revenue from Contracts with Customers to determine how and when it recognizes revenues. The Company accounts for a customer contract when both parties have approved the contract and are committed to perform their respective contractual obligations, each party’s rights can be identified, payment terms can be identified, the contract has commercial substance and it is probable that the Company will collect the consideration to which it is entitled.

When billed in advance, the payment is deferred and recognized upon delivery of the service. Collectability is assessed based on a number of factors including collection history and customer creditworthiness. If collectability of substantially all consideration to which the Company is entitled under the contract is determined to be not probable, revenue is not recorded until collectability becomes probable. Revenue is recorded based on the transaction price excluding amounts collected on behalf of third parties, such as sales taxes collected and remitted to governmental authorities.

Trade receivables are recorded at the invoiced amount and do not bear interest. The Company calculates an allowance for doubtful accounts based on a risk assessment performed when trade receivables are recognized. The allowance is calculated in accordance with ASC Topic 326 - Current Expected Credit Losses. Write-offs are recorded at the time when trade receivables are deemed uncollectible.

The Company has historically recognized revenue from two primary sources, feasibility studies and government grants. Feasibility studies represent reports prepared to assist a customer in determining the viability of the NET Power Cycle for their specific use case. Government grants represent U.S. federal programs that incentivize the development of novel energy solutions. The Company has served as a sub-recipient to such government grants. Feasibility studies generally contain one performance obligation, the customer’s acceptance of the feasibility study report at the end of the review period. Government grants generally contain multiple performance obligations related to the incursion of costs associated with the development of in-scope activities that entitle the Company, as sub-recipient, to reimbursement from the primary grant recipient.

Accounts Receivable

Revenue Recognition, Trade Receivables and Allowance for Doubtful Accounts – The Company follows the guidance within ASC Topic 606 – Revenue from Contracts with Customers to determine how and when it recognizes revenues. The Company accounts for a customer contract when both parties have approved the contract and are committed to perform their respective contractual obligations, each party’s rights can be identified, payment terms can be identified, the contract has commercial substance and it is probable that the Company will collect the consideration to which it is entitled.

When billed in advance, the payment is deferred and recognized upon delivery of the service. Collectability is assessed based on a number of factors including collection history and customer creditworthiness. If collectability of substantially all consideration to which the Company is entitled under the contract is determined to be not probable, revenue is not recorded until collectability becomes probable. Revenue is recorded based on the transaction price excluding amounts collected on behalf of third parties, such as sales taxes collected and remitted to governmental authorities.

Trade receivables are recorded at the invoiced amount and do not bear interest. The Company calculates an allowance for doubtful accounts based on a risk assessment performed when trade receivables are recognized. The allowance is calculated in accordance with ASC Topic 326 - Current Expected Credit Losses. Write-offs are recorded at the time when trade receivables are deemed uncollectible.

The Company has historically recognized revenue from two primary sources, feasibility studies and government grants. Feasibility studies represent reports prepared to assist a customer in determining the viability of the NET Power Cycle for their specific use case. Government grants represent U.S. federal programs that incentivize the development of novel energy solutions. The Company has served as a sub-recipient to such government grants. Feasibility studies generally contain one performance obligation, the customer’s acceptance of the feasibility study report at the end of the review period. Government grants generally contain multiple performance obligations related to the incursion of costs associated with the development of in-scope activities that entitle the Company, as sub-recipient, to reimbursement from the primary grant recipient.

Fair Value

Fair Value - Certain assets and liabilities are carried at fair value in accordance with ASC Topic 820 – Fair Value Measurement. Fair value is defined as the price that would be received for an asset or paid to transfer a liability (i.e., the exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The guidance establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

•Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities;

•Level 2 - Significant other observable inputs other than Level 1 prices, such as quoted prices for similar, but not identical, assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data; and

•Level 3 - Significant unobservable inputs in which there is little or no market data available and requires the Company to develop its own assumptions that market participants would use in pricing an asset or liability.

Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of any input that is significant to the fair value measurement. The Company’s estimates of fair values are based upon assumptions believed to

be reasonable, but which are uncertain and involve significant managerial judgments made by considering factors specific to the asset or liability. The determination of fair value requires more judgment to the extent the valuation is based on models or inputs that are less observable or unobservable in the market. Accordingly, the degree of judgment exercised by the Company in determining the fair value is greatest for instruments categorized as Level 3.

The Company’s recurring fair value measurements comprise the Private Placement Warrants, the Public Warrants, the Earnout Shares (as defined below) and short-term investments (Note I).

Cash

Cash - Cash consists of liquid deposits at banking institutions that are members of the Federal Deposit Insurance Corporation (“FDIC”) and the Financial Services Compensation Scheme (“FSCS”), the UK’s statutory compensation system for customers of authorized financial services firms. FDIC guidelines guarantee $250 per depositor, per insured bank and FSCS guidelines guarantee £85 per depositor per insured bank.

Warrants

Warrants - The Company issued Public Warrants and Private Placement Warrants prior to the consummation of the Business Combination (Note C). The Company accounts for both the Public Warrants and Private Placement Warrants as liability-classified instruments based on an assessment of the Warrants’ specific terms and applicable authoritative guidance outlined in ASC Topic 480 - Distinguishing Liabilities from Equity ("ASC 480"), ASC Topic 815 - Derivatives and Hedging ("ASC 815") and relevant SEC reporting rules. The guidance considers whether the Warrants are freestanding financial instruments pursuant to ASC 480, whether the Warrants meet the definition of a liability pursuant to ASC 480, whether the Warrants meet all of the requirements for equity classification under ASC 815 and whether class of equity into which the Warrants settle possess substantive voting rights. This assessment is conducted at the time of the instruments’ issuance and at each subsequent quarterly period end date while the Warrants remain outstanding. In compliance with ASC 815, the Company accounts for the outstanding Warrants as a liability at fair value on the Consolidated Balance Sheets. The Warrants are subject to remeasurement at each Balance Sheets date with any change in the Warrants’ fair value recognized in the Company’s Consolidated Statements of Operations and Comprehensive Loss.

Short-Term Investments

Short-Term Investments - The Company classifies investments with maturities greater than three months but less than one year as short-term investments. As of September 30, 2023, the Company's short-term investment balance consisted of a single six-month certificate of deposit custodied by a domestic banking institution.

Short-term investments are classified as held-to-maturity according to the guidance contained within ASC 326 - Financial Instruments - Credit Losses because the Company has the intent and ability to hold the certificate of deposit until maturity. Interest income generated from short-term investments is recorded as interest income in the Company's Consolidated Statements of Operations and Comprehensive Loss.

Tax Receivable Agreement

Tax Receivable Agreement Liability - As part of the Business Combinations (Note C), the Company entered into the TRA with certain OpCo unitholders that will represent approximately 75% of the calculated tax savings based on the portion of basis adjustments on exchanges of OpCo units and other carryforward attributes that are anticipated to be able to be utilized in future years. Such tax attributes include the existing tax basis of certain assets of OpCo and its consolidated subsidiaries; tax basis adjustments resulting from taxable exchanges of Class A OpCo Units; certain tax benefits realized by NET Power Inc. as a result of the Business Combination and tax deduction in respect of portions of certain TRA payments. All such payments made under the terms of the TRA are the obligations of NET Power Inc. and not of OpCo.

Reference Note O to review additional information about the TRA Liability.

Intangible Assets

Intangible Assets - The Company accounts for intangible assets, which consist of developed technology related to the NET Power Cycle, in accordance with ASC Topic 350 - Goodwill and Other Intangible Assets (“ASC 350”). The following table summarizes the estimated useful lives used to amortize definite lived intangible assets:

Intangible Asset Classification	Useful Life
Developed Technology	20

The weighted average amortization period for all intangible assets is 20 years.

Goodwill

Goodwill - The Company recognizes goodwill in accordance with ASC 350. Goodwill represents the excess costs of an acquired entity over the amounts assigned to assets acquired and liabilities assumed in a business combination. Goodwill is not amortized but is tested annually for impairment. During the June 8, 2023 through September 30, 2023 (Successor) period, the Company determined that no impairment charges for goodwill were required to be recognized.

Prepaid Expenses

Prepaid Expenses - Prepaid expenses consist of costs paid in advance for software and other subscriptions, patent renewal fees, general liability insurance and employee health insurance.

Property, Plant and Equipment

Property, Plant and Equipment - Property, plant and equipment are recorded at the historical cost to acquire the assets. The costs bases of property, plant and equipment to which the Company held title prior to the Business Combination completion (Note C) were stepped-up to their respective fair values on June 8, 2023 in accordance with the closure of the Business Combination. The Demonstration Plant's depreciable value consists of costs associated with the engineering, procurement, and construction of the facility.

Depreciation is calculated on the straight-line method over the estimated useful lives of the assets. Amounts capitalized to construction in progress are not depreciated until the underlying asset is placed into service. The following table summarizes the estimated useful lives used to depreciate property, plant and equipment and assets:

Asset Classification	Useful Life
Furniture and Equipment	4 – 7
Demonstration Plant	7
Construction in Progress	—

Impairment of Definite-Lived Assets

Impairment of Definite-Lived Assets - In accordance with ASC Topic 360 - Property, Plant and Equipment, tangible and intangible assets with finite useful lives are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets placed in service is measured by comparing the carrying amount of an asset or asset group to the future undiscounted cash flows expected to be generated by the asset or asset group. If such assets are considered to be impaired, impairment equals the amount by which the carrying amount of the assets exceeds the fair value of the assets.

Lease Agreements

Lease Agreements – Lease agreements may fall within two categories according to ASC Topic 842 – Leases ("ASC 842"), operating leases or financing leases. Both operating and finance leases result in the recognition of lease liabilities and associated right-of-use assets that are valued at the net present value of the lease payments and recognized. The Company has elected the short-term lease exception and therefore only recognizes right-of-use assets and lease liabilities for leases with a term greater than one year. The lease term includes the committed lease term identified in the contract, taking into account renewal and termination options that management is reasonably certain to exercise. The discount rate used in the measurement of a right-to-use asset and lease liability is the rate implicit in the lease whenever that rate is readily determinable. If the rate implicit in the lease is not readily determinable, the Company uses its incremental borrowing rate as a proxy for the discount rate based on the term of the lease unless the implicit rate is available.

Asset Retirement Obligation

Asset Retirement Obligation – The Company recognizes liabilities and the corresponding assets for future obligations associated with the retirement of assets. The fair values of legal obligations to retire and remove long-lived assets are recorded in the period in which the obligation is incurred. Prior to the consummation of the Business Combination (Note C), asset retirement obligations were reflected in property, plant and equipment. In conjunction with the Business Combination, the Company re-measured its property, plant and equipment assets at their respective June 8, 2023 fair values, which resulted in the asset retirement obligation being removed from Property, plant and equipment on the Consolidated Balance Sheets. When an asset retirement obligation arises, the liabilities and corresponding assets are recorded at their present values using a discounted cash flow approach and the liabilities are accreted using the interest method. The asset retirement costs and corresponding liabilities that have been recorded to-date relate to the obligations of the land lease for the property underneath the Demonstration Plant at the end of the Demonstration Plant's estimated useful life.

The Company’s valuation of the asset retirement obligation related to the Demonstration Plant encompasses an estimate for the cost to restore the site as required by lease terms. The accretion expense generated by the Company’s asset retirement obligation liability is recognized ratably over the Demonstration Plant’s expected seven year useful life.

Net Loss per Unit and Net Loss per Share

Net Loss per Unit - During the Predecessor Period, the Company computed basic net loss per unit by dividing the total net loss applicable to membership interest holders by the weighted average number of membership interests outstanding during the period. The Company computed diluted net loss per unit by dividing the net loss applicable to membership interest holders by the sum of the weighted-average number of membership interests outstanding during the period and the

potentially dilutive effects of distribution units, profits interests and options to purchase membership interests. Such items were excluded if their effect was anti-dilutive. Since the impact of the distribution units, profits interests, and options to purchase membership interests were anti-dilutive during periods of net loss, there was no difference between the Company’s basic and diluted net loss per unit for the period from January 1, 2023 through June 7, 2023 (Predecessor) or the year ended December 31, 2022 (Predecessor).

Net Loss per Share - During the Successor Period, basic net loss per share is computed based on the weighted average number of shares of Class A Common Stock outstanding. Diluted net loss per share is computed based on the weighted average number of common shares outstanding, increased by the number of any additional shares that would have been outstanding had any potentially dilutive common shares been issued. For the purposes of the diluted earnings per share calculation, Warrants, Earnout Shares, restricted stock units and conversion of OpCo Units are excluded from the calculation for the period from June 8 through September 30, 2023 (Successor), as the inclusion would be anti-dilutive due to the losses reported in the year.

Successor Period – Basic net loss per share is computed based on the weighted average number of shares of Class A Common Stock outstanding. Diluted net income per share is computed based on the weighted average number of shares of Class A Common Stock outstanding, increased by the number of any additional shares of Class A Common Stock that would have been outstanding had any potentially dilutive shares of Class A Common Stock been issued and reduced by the number of shares of Class A Common Stock the Company could have repurchased from the proceeds from issuance of the potentially dilutive shares. For the purposes of the diluted earnings per share calculation, Warrants, Earnout Shares, BHES Bonus Shares (as defiend below) (Note L), unvested Class A OpCo Units and the potential conversion of vested OpCo Units are excluded from the net loss per share calculation for the period from June 8, 2023 through September 30, 2023 (Successor) because their inclusion would be anti-dilutive due to the losses reported in the Successor Period. Additionally, Earnout Shares and BHES Bonus Shares are excluded from the net loss calculation because the contingencies that would allow for those Earnout Shares to vest into OpCo Units have not yet been met.Predecessor Period – Basic net loss per unit is computed based on the weighted average number of membership interests outstanding. Diluted net loss per unit is computed based on the weighted average number of membership interests outstanding, increased by the number of any additional units that would have been outstanding had any potentially dilutive membership interests been issued and decreased by the number of membership interests the Company could have repurchased from the proceeds from issuance of the potentially dilutive membership interests.

Equity Based Compensation

Equity Based Compensation – The Company applies ASC Topic 718 – Share-Based Payments (“ASC 718”) to account for its equity awards. Equity awards granted to employees include unvested Class A OpCo Units and a corresponding number of unvested shares of Class B Common Stock and RSU's that settle into shares of Class A Common Stock upon vesting. Generally, each award is subject to a service condition that requires a specific period of continued employment or service to the Company to elapse before the award fully vests. Certain awards also include performance conditions to vest fully. The Board’s Compensation Committee establishes these service and performance conditions.

The estimated fair value of NET Power, LLC membership units was determined by an independent, external valuation service provider at each equity grant date until the the Closing Date, upon which the Company became publicly traded. On the Closing Date, the Company fair valued the OpCo Units used to satisfy outstanding share-based awards at the fair value of the Company's Class A Common Stock.

In accordance with ASC 718, the Company recognizes expense related to equity awards for which vesting is considered probable. Forfeitures are recognized as they occur. For service-based awards, compensation cost is measured at fair value on the grant date and expensed ratably over the vesting term. For performance-based grants, the fair value is measured on the grant date and recognized as non-cash compensation expense, considering the probability of the targets being achieved. The Company recognizes compensation expense generated by all service-based awards on a straight-line basis over the underlying awards's vesting period.

Earnout Shares and Restricted Shares

Unvested Earnout Shares are reported as liabilities within the Company’s Consolidated Balance Sheets. The liability classification reflects the Company’s evaluation of the Earnout Shares according to ASC 480’s and ASC 815’s standards. The Price Based Lockup Shares and the Time-Based Lockup Shares are included as equity within the Company's Consolidated Balance Sheets.

Non-Controlling Interest

Non-Controlling Interest - Non-controlling interests (“NCI”) represent Legacy NET Power Holders partners’, sponsors' and certain strategic partners' respective ownership of OpCo. After the conversion of Class B OpCo Units to Class A OpCo Units, NCI is comprised exclusively of Class A OpCo Units (Note K). After evaluating Class A OpCo Unit redemption rights under ASC 480, the Company determined that Class A OpCo Units are subject to potential cash redemption that rests outside the Company's control. The Company has classified NCI as a component of mezzanine equity in consideration of this cash redemption feature and in accordance with ASC 810's guidance.

Research and Development Costs

Research and Development Costs - The Company expenses costs related to operations and testing at the Demonstration Plant, as well as engineering and design costs related to development of the NET Power Cycle as incurred. These costs are included in Research and Development on the Consolidated Statements of Operations and Comprehensive Loss.

Related Parties

Related Parties –The Company applies ASC Topic 850 – Related Parties ("ASC 850") and prevailing SEC guidance to classify and report transactions with related parties.

The Company has entered into contractual relationships with several of its current shareholders and former members that qualify as related parties according to the aforementioned criteria. These relationships include loans from members and master service agreements (“MSA's”).

Income and Uncertain Taxes

Income and Uncertain Taxes – The Company applies the guidance set forth in ASC Topic 740 – Income Taxes (“ASC 740”) to evaluate its tax positions. The Company evaluates the realizability of deferred tax assets on a quarterly basis and establishes a valuation allowance when it is more-likely-than-not that all or a portion of a deferred tax asset may not be realized. The Company calculates the provision for income taxes during interim periods by applying an estimate of the forecasted annual effective tax rate for the full fiscal year to ordinary income or loss (pretax income or loss excluding unusual or infrequently occurring discrete items) for the reporting period.

NET Power Inc. consolidates the financial results of OpCo in its consolidated financial statements. OpCo represents a pass-through entity for U.S. federal and most applicable state and local income tax purposes. As a pass-through entity for tax purposes, OpCo is not subject to U.S. federal and certain state and local income taxes. Any taxable income or loss generated by OpCo is passed through to its members, including NET Power Inc., which is taxed as a corporation that pays corporate federal, state and local taxes with respect to income allocated from OpCo based on its economic interest in OpCo.

NP Europe is subject to taxation pursuant to UK tax regulations. For the quarter ended September 30, 2023 (Successor) and the year ended December 31, 2022 (Predecessor), NP Europe incurred taxable losses, which may be used to offset future profits. The Company has established a valuation allowance against possible future tax benefits because the ability to recognize these benefits does not meet ASC 740's more-likely-than-not recognition threshold; therefore, no provision or asset for UK income taxes has been included in the consolidated financial statements.

Management evaluated the Company’s tax positions and concluded that the Company had taken no uncertain tax positions that require adjustment to comply with the applicable accounting guidance.

XML

Basis of Presentation and Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Schedule of Finite-Lived Intangible Assets

The following table summarizes the estimated useful lives used to amortize definite lived intangible assets:

Intangible Asset Classification	Useful Life
Developed Technology	20

Definite Lived Intangible Assets - The following tables present the Company's definite lived intangible assets as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor) are as follows:

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Developed Technology, gross	$	1,345,000	$	604
Accumulated Amortization	(20,922)		(341)
Developed Technology, net	$	1,324,078	$	263

Property, Plant and Equipment

The following table summarizes the estimated useful lives used to depreciate property, plant and equipment and assets:

Asset Classification	Useful Life
Furniture and Equipment	4 – 7
Demonstration Plant	7
Construction in Progress	—

The following table summarizes the key classifications of property, plant and equipment as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor):

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Furniture and Equipment, gross	$	253	$	368
Accumulated Depreciation	(17)		(216)
Furniture and Equipment, net	236		152
Demonstration Plant, gross	89,240		128,013
Accumulated Depreciation	(3,955)		(58,570)
Demonstration Plant, net	85,285		69,443
Construction in Progress	6,237		—
Total Property, Plant and Equipment, net	$	91,758	$	69,595

XML

Business Combination (Tables)

9 Months Ended

Sep. 30, 2023

Business Combination and Asset Acquisition [Abstract]

Schedule of Business Acquisitions, by Acquisition

The following table summarizes the total consideration transferred in the Business Combination:

Consideration Transferred	Total
Pre-combination vesting of modified profits interests	$	325
Pre-combination vesting of unmodified profits interests	651
Consideration Transferred to Sellers	976
Class A OpCo Units - non-controlling interests	1,785,283
Fair value of total consideration transferred	$	1,786,259

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table sets forth the fair value of the assets and liabilities assumed in connection with the Business Combination:

	Total
Assets Acquired
Current Assets
Cash	$	7,946
Prepaid expenses	637
Other current assets	30
Total Current Assets	8,613
Long Term Assets
Intangible assets, net	1,345,000
Property, plant and equipment	91,855
Right-of-use assets	940
Total Long Term Assets	1,437,795
Total Assets Acquired	$	1,446,408
Liabilities Assumed
Current Liabilities
Accounts payable	2,574
Accrued liabilities	7,370
Current lease liability	137
Other current liabilities	1
Total Current Liabilities	10,082
Long Term Liabilities
Deferred tax liability	71,459
Asset retirement obligation	1,967
Long term lease liability	594
Total Long Term Liabilities	74,020
Total Liabilities Assumed	84,102
Total identifiable net assets	1,362,306
Goodwill	423,953
Net assets acquired	$	1,786,259

Business Acquisition, Pro Forma Information

The following table presents pro forma information as if the Business Combination occurred as of January 1, 2022. The pro forma information reflects adjustments for additional amortization resulting from the fair value re-measurement of assets acquired and liabilities assumed, for alignment of accounting policies, and transaction expenses as if the Business Combination occurred on January 1, 2022. The pro forma results do not include any anticipated cost synergies or other effects of the combined Company. Accordingly, pro forma amounts are not necessarily indicative of the results that actually would have occurred had the Business Combination been completed on the date indicated, nor are they indicative of the Company's future operating results.

	Three Months Ended				Nine Months Ended
	September 30, 2023		September 30, 2022		September 30, 2023		September 30, 2022
Pro forma revenue	$	125	$	208	$	175	$	574
Pro forma net loss	(91,966)		(28,964)		(266,123)		(87,558)
Pro forma net loss attributable to non-redeemable controlling interest	(29,981)		(9,442)		(86,756)		(28,544)
Pro forma net loss attributable to non-redeemable non-controlling interests	(61,985)		(19,522)		(179,367)		(59,014)

XML

Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table presents the Company's goodwill balance as of September 30, 2023 (Successor):

	Goodwill
Goodwill at June 30, 2023 (Successor)	$	433,736
Measurement Adjustments	(9,783)
Goodwill at September 30, 2023 (Successor)	$	423,953

Schedule of Finite-Lived Intangible Assets

The following table summarizes the estimated useful lives used to amortize definite lived intangible assets:

Intangible Asset Classification	Useful Life
Developed Technology	20

Definite Lived Intangible Assets - The following tables present the Company's definite lived intangible assets as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor) are as follows:

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Developed Technology, gross	$	1,345,000	$	604
Accumulated Amortization	(20,922)		(341)
Developed Technology, net	$	1,324,078	$	263

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The following table presents estimated amortization expense for future periods and future years ending December 31:

	Future Amortization Expense
2023	$	16,813
2024	67,250
2025	67,250
2026	67,250
2027	67,250
2028 and thereafter	1,038,265
Total	$	1,324,078

XML

Property, Plant, and Equipment (Tables)

9 Months Ended

Sep. 30, 2023

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

The following table summarizes the estimated useful lives used to depreciate property, plant and equipment and assets:

Asset Classification	Useful Life
Furniture and Equipment	4 – 7
Demonstration Plant	7
Construction in Progress	—

The following table summarizes the key classifications of property, plant and equipment as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor):

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Furniture and Equipment, gross	$	253	$	368
Accumulated Depreciation	(17)		(216)
Furniture and Equipment, net	236		152
Demonstration Plant, gross	89,240		128,013
Accumulated Depreciation	(3,955)		(58,570)
Demonstration Plant, net	85,285		69,443
Construction in Progress	6,237		—
Total Property, Plant and Equipment, net	$	91,758	$	69,595

Schedule of Asset Retirement Obligations

Asset Retirement Obligation - The following table disaggregates the contents of the Company's asset retirement obligation included in Property, Plant and equipment, net on the Consolidated Balance Sheets as of December 31, 2022 (Predecessor):

	December 31, 2022 (Predecessor)
Asset Retirement Obligation, gross	$	2,201
Accumulated Depreciation	(348)
Asset Retirement Obligation, net	$	1,853

XML

Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2023

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities

Accrued liabilities as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor) are as follows:

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Accrued Incentive Compensation	$	1,023	$	1,451
Accrued cash-based expense of Original JDA and Amended and Restated JDA	2,748		—
Accrued Legal Service Provider Fees	1,731		645
Other Accrued Liabilities	1,929		296
Total Accrued Liabilities	$	7,431	$	2,392

XML

Trade Receivables and Allowance for Doubtful Accounts (Tables)

9 Months Ended

Sep. 30, 2023

Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

Trade receivables, net as of September 30, 2023 (Successor) and December 31, 2022 (Predecessor) comprise the following balances:

	September 30, 2023 (Successor)		December 31, 2022 (Predecessor)
Trade Receivables, gross	$	—	$	352
Allowance for Doubtful Accounts	—		—
Trade Receivables, net	$	—	$	352

XML

Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value, Liabilities Measured on Recurring Basis

The following table presents information about the Company’s liabilities that are measured at fair value on a recurring basis as of September 30, 2023 (Successor) and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine each asset's and each liability's fair value:

Assets	Level 1		Level 2		Level 3		Total
Short-term Investments	$	—	$	100,000	$	—	$	100,000
Total	$	—	$	100,000	$	—	$	100,000
Liabilities	Level 1		Level 2		Level 3		Total
Public Warrants	$	37,420	$	—	$	—	$	37,420
Private Placement Warrants	—		—		103,114		103,114
Earnout Shares	—		—		4,546		4,546
Total	$	37,420	$	—	$	107,660	$	145,080

The following table presents information about the Company’s liabilities that were measured at fair value on a recurring basis as of December 31, 2022 (Predecessor) and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine each liability's fair value:

Liabilities	Level 1		Level 2		Level 3		Total
Option Liability	$	—	$	—	$	5,174	$	5,174
Total	$	—	$	—	$	5,174	$	5,174

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

The following table presents a reconciliation of the beginning and ending balances of recurring level 3 fair value measurements:

	July 1 – September 30, 2023 (Successor)		July 1 – September 30, 2022 (Predecessor)		June 8 – September 30, 2023 (Successor)		January 1 – June 7, 2023 (Predecessor)		January 1 - September 30, 2022 (Predecessor)
Balance of recurring level 3 liabilities at beginning of period	$	63,187	$	1,854	$	63,851	$	5,174	$	1,459
Total gains and losses during the period included in    Other Income (Expense)	52,352		—		51,688		—		395
Issuances	(7,879)		—		(7,879)		—		—
Payments	—		—		—		(5,174)		—
Transfers into level 3	—		—		—		—		—
Transfers out of level 3	—		—		—		—		—
Balance of recurring level 3 liabilities at end of period	$	107,660	$	1,854	$	107,660	$	—	$	1,854

XML

Net Loss per Share and Net Loss per Unit (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Based on the amounts outstanding at September 30, 2023 (Successor), the Company excluded the following financial instruments from the computation of diluted net loss per unit because their inclusion would be anti-dilutive due to the losses reported in the Successor Period:

Anti-Dilutive Instrument	September 30, 2023 (Successor)
Public Warrants	8,622,235
Private Placement Warrants	10,900,000
Earnout Shares	328,925
BHES Bonus Shares	2,068,416
Unvested Class A OpCo Units	972,522
Vested Class A OpCo Units	140,747,943
Unvested RSU's	440,423
Total	164,080,464

Based on the amounts outstanding at September 30, 2022 (Predecessor), the Company excluded the following potential membership interests from the computation of diluted net loss per unit because their inclusion would be anti-dilutive due to the losses reported in the Predecessor Period:

Anti-Dilutive Instrument	September 30, 2022 (Predecessor)
Profits Interests	450,013
Member Loan Share Options	34,588
Occidental Petroleum Share Options	711,111
Total	1,195,712

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth the computation of the Company’s basic and diluted net loss per share for the period from June 8, 2023 through September 30, 2023 (Successor):

	Class A
Numerator
Net loss	$	(202,551)
Net loss attributable to shareholders	$	(65,564)
Denominator
Weighted-average number shares outstanding, basic and diluted	68,644,032
Net loss per share attributable to shareholders, basic and diluted	$	(0.96)

The following table sets forth the computation of the Company’s basic and diluted net loss per unit for the three month and nine month periods ended September 30, 2022 (Predecessor) and for the period from January 1, 2023 through June 7, 2023 (Predecessor), respectively:

	Period from July 1 - September 30, 2023 (Successor)		Three Months Ended September 30, 2022 (Predecessor)		Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)		Nine Months Ended September 30, 2022 (Predecessor)
Numerator
Net loss	$	(30,564)	$	(12,220)	$	(65,564)	$	(34,176)	$	(37,335)
Net loss attributable to membership interest holders	$	(30,564)	$	(12,220)	$	(65,564)	$	(34,176)	$	(37,335)
Denominator
Weighted-average number membership interests outstanding, basic and diluted	68,966,972		1,143,430		68,644,032		3,766,871		2,838,388
Net loss per unit attributable to membership interest holders, basic and diluted	$	(0.44)	$	(10.69)	$	(0.96)	$	(9.07)	$	(13.15)

XML

Shareholders' Equity, Non-Controlling Interest and Members' Equity (Tables)

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Schedule Of Comprehensive Loss Attributable To Non-Redeemable And Redeemable Non-Controlling Interest

The table below demonstrates the calculation of net loss before income tax attributable to redeemable non-controlling interest holders for the July 1, 2023 through September 30, 2023 (Successor) period and the June 8, 2023 through September 30, 2023 (Successor) period:

	Period from July 1 - September 30, 2023 (Successor)			Period from June 8 - September 30, 2023 (Successor)
Net Loss before Income Tax	$	(91,976)		$	(203,232)
Redeemable non-controlling interest percentage - Class A OpCo Units	67.4		%	67.3		%
Net Loss before Income Tax attributable to Class A OpCo Units	$	(61,402)		$	(136,987)

XML

Share-Based Payments (Tables)

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Share-Based Payment Arrangement, Option, Activity

The following table presents a summary of employee equity awards comprised of Class A OpCo Units and a corresponding quantity of shares of Class B Common Stock outstanding, granted, forfeited, vested on an accelerated basis and redeemed during the current year-to-date:

	Quantity		Calculated Value
	Period from June 8 - September 30, 2023 (Successor)	Period from January 1 - June 7, 2023 (Predecessor)	Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)
Unvested, beginning of period	1,895,122	226,494	$	4.95	$	63.25
Granted	—	—	$	—	$	—
Forfeited	(324,568)	—	$	5.66	$	—
Vested	—	(107,418)	$	—	$	63.18
Accelerated	(598,032)	—	$	4.32	$	—
Unvested, end of period	972,522	119,076	$	4.45	$	63.32

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity

The following table presents a summary of RSU's outstanding, granted, forfeited, vested on an accelerated basis and redeemed during the current year-to-date:

	Quantity		Fair Value
	Period from June 8 - September 30, 2023 (Successor)	Period from January 1 - June 7, 2023 (Predecessor)	Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)
Unvested, beginning of period	—	—	$	—	$	—
Granted	440,424	—	$	13.43	$	—
Forfeited	—	—	$	—	$	—
Vested	—	—	$	—	$	—
Accelerated	—	—	$	—	$	—
Unvested, end of period	440,424	—	$	13.43	$	—

Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award

JDA - The following table presents the quantity and value of equity issued to BHES as payment for costs incurred pursuant to the Original JDA and the Amended & Restated JDA (Note N). The portion of Original JDA and Amended and Restated JDA costs that the Company pays with Class A OpCo Units and shares of Class B Common Stock is recorded within additional paid in capital on the Consolidated Balance Sheets and the Consolidated Statement of Shareholders' Equity and Non-Controlling Interest. The Equivalent Value per Unit displays the discounted price per membership interest or per share stipulated in the Original JDA and the Amended and Restated JDA. The Total Fair Value columns display the fair value of shares distributed as payment for services rendered by BHES under the terms of the Original JDA and the Amended and Restated JDA.

	Quantity		Total Fair Value
	Period from June 8 - September 30, 2023 (Successor)	Period from January 1 - June 7, 2023 (Predecessor)	Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)		Equivalent Value per Unit or per Share
Membership Interests	—	9,210	$	—	$	1,943	$	168.75
Class A OpCo Units	542,324	296,160	3,585		1,958		$	5.29
Class B Common Stock	542,324	296,160	—		—		$	—
Total			$	3,585	$	3,901

The following table disaggregates the variable compensation payable to BHES should it meet its milestone objectives:

	Performance Period End Date	Compensation Cost Incurred To Date		Remaining Compensation Cost		Total Compensation Cost
JDA - variable share-based payments	January, 2027	$	20,557	$	6,788	$	27,345

XML

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation

The following table reconciles the beginning value of the Company's asset retirement obligation liability to its ending balance for each period presented in the Consolidated Statements of Operations and Comprehensive Loss:

	Period from July 1 – September 30, 2023 (Successor)		Three Months Ended September 30, 2022 (Predecessor)		Period from June 8 – September 30, 2023 (Successor)		Period from January 1 – June 7, 2023 (Predecessor)		Nine Months Ended September 30, 2022 (Predecessor)
Asset retirement obligation, beginning of period	$	1,977	$	2,308	$	1,977	$	2,416	$	—
Obligation incurred	—		—		—		—		2,201
Periodic accretion expense	41		54		41		102		161
Asset retirement obligation, end of period	$	2,018	$	2,362	$	2,018	$	2,518	$	2,362

Long-Term Purchase Commitment

The following table presents the Company’s material, unrecognized purchase obligations:

Commitment	Consideration Type	Gross Commitment		Period from June 8 - September 30, 2023 (Successor)		Period from January 1 - June 7, 2023 (Predecessor)		Prior Predecessor Periods		Remaining Commitment
Asset Purchase Commitment	Cash	$	4,700	$	—	$	1,168	$	—	$	3,532
Original JDA and Amended and Restated JDA	Cash	70,000		2,867		3,121		2,211		61,801
Original JDA and Amended and Restated JDA	Share-Based	70,000		3,585		3,902		2,765		59,748
	Total	$	144,700	$	6,452	$	8,191	$	4,976	$	125,081

Equity Method Investments

The following table presents the costs associated with the JDA's:

	Period from				Period from
	July 1 – September 30, 2023 (Successor)		July 1 – September 30, 2022 (Predecessor)		June 8 – September 30, 2023 (Successor)		January 1 – June 7, 2023 (Predecessor)		January 1 – September 30, 2022 (Predecessor)
Cash expense	$	2,748	$	578	$	2,867	$	3,121	$	1,256
Plus: Membership Interests Issued	—		723		—		3,902		6,934
Plus: Class A OpCo Units Issued	3,436		—		3,585		—		—
Plus: BHES Bonus Share expense	819		2,688		6,010		4,690		1,570
Total research and development attributable to JDA	$	7,003	$	3,989	$	12,462	$	11,713	$	9,760

XML

Income Taxes (Tables)

9 Months Ended

Sep. 30, 2023

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

The following table presents the Company’s Income tax (benefit) expense and the effective income tax rate during the period from June 8 through September 30, 2023 (Successor):

	June 8 - September 30, 2023 (Successor)
Income tax expense (benefit)	$	(681)
Effective tax rate	0.3		%

XML

Organization and Nature of the Business (Details) - MW	1 Months Ended	12 Months Ended
	May 31, 2018	Dec. 31, 2021	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Renewable energy assets, power generation capacity (in megawatts)			50
First-fire achievement, period	2 years
First-fire test campaign, period		3 months

XML

Basis of Presentation and Significant Accounting Policies - Narrative (Details) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($) tranche $ / shares shares	Sep. 30, 2023 USD ($) trading_day segment tranche line_of_business $ / shares shares	Dec. 31, 2022 USD ($)
Class of Stock [Line Items]
Number of operating segments | segment		1
Number of reportable segments | segment		1
Number of line of businesses | line_of_business		1
Cash deposits, amounts in excess of FDIC limit | $	$ 544,727	$ 544,727	$ 4,644
Maturity of time deposits	6 months	6 months
Tax receivable agreement, net cash savings, percentage	0.75	0.75
Useful Life	20 years	20 years
Demonstration Plant
Class of Stock [Line Items]
Useful Life	7 years	7 years
OpCo
Class of Stock [Line Items]
Subsidiary, ownership percentage	32.60%	32.60%
Price Based Lockup Shares
Class of Stock [Line Items]
Lockup shares, transfer threshold		3 years
Time-Based Lockup Shares
Class of Stock [Line Items]
Lockup shares, transfer threshold		1 year
Price Based Lockup Shares, Transfer Tranche One | Price Based Lockup Shares
Class of Stock [Line Items]
Lockup shares, percentage of shares transferable	0.33	0.33
Price Based Lockup Shares, Transfer Tranche Two | Price Based Lockup Shares
Class of Stock [Line Items]
Lockup shares, percentage of shares transferable	0.33	0.33
Price Based Lockup Shares, Transfer Tranche Three | Price Based Lockup Shares
Class of Stock [Line Items]
Lockup shares, percentage of shares transferable	1	1
NCI Holders | OpCo
Class of Stock [Line Items]
Noncontrolling interest, ownership percentage	67.40%	67.40%
Class A Common Stock
Class of Stock [Line Items]
Common stock subject to vesting and transfer restrictions (in shares) | shares	986,775	986,775
Number of tranches | tranche	3	3
Class A Common Stock | Price Based Lockup Shares
Class of Stock [Line Items]
Common stock, lockup shares (in shares) | shares	44,544,551	44,544,551
Lockup shares, threshold trading days		20
Lockup shares, threshold consecutive trading days		30
Class A Common Stock | Time-Based Lockup Shares
Class of Stock [Line Items]
Common stock, lockup shares (in shares) | shares	89,449,655	89,449,655
Lockup shares, threshold trading days		20
Lockup shares, threshold consecutive trading days		30
Share price (in usd per share) | $ / shares	$ 12.00	$ 12.00
Class A Common Stock | Price Based Lockup Shares, Transfer Tranche One | Price Based Lockup Shares
Class of Stock [Line Items]
Share price (in usd per share) | $ / shares	12.00	12.00
Class A Common Stock | Price Based Lockup Shares, Transfer Tranche Two | Price Based Lockup Shares
Class of Stock [Line Items]
Share price (in usd per share) | $ / shares	14.00	14.00
Class A Common Stock | Price Based Lockup Shares, Transfer Tranche Three | Price Based Lockup Shares
Class of Stock [Line Items]
Share price (in usd per share) | $ / shares	16.00	16.00
Class A Common Stock | Earnout Shares Vesting, Tranche One
Class of Stock [Line Items]
Volume weighted average stock price trigger (in usd per share) | $ / shares	12.00	$ 12.00
Earnout shares vesting, threshold trading days		20
Earnout shares vesting, threshold consecutive trading days		30
Class A Common Stock | Earnout Shares Vesting, Tranche Two
Class of Stock [Line Items]
Volume weighted average stock price trigger (in usd per share) | $ / shares	$ 14.00	$ 14.00
Earnout shares vesting, threshold trading days		20
Earnout shares vesting, threshold consecutive trading days		30
Class A Common Stock | Earnout Shares Vesting, Tranche Three
Class of Stock [Line Items]
Volume weighted average stock price trigger (in usd per share) | $ / shares		$ 16.00
Earnout shares vesting, threshold trading days		20
Earnout shares vesting, threshold consecutive trading days		30
Earnout shares, term		3 years
Class A Common Stock | OpCo
Class of Stock [Line Items]
Common stock subject to vesting and transfer restrictions (in shares) | shares	128,908,518	128,908,518
Class A Common Stock | NET Power, Inc.
Class of Stock [Line Items]
Common stock subject to vesting and transfer restrictions (in shares) | shares	54,047,495	54,047,495
Class B ordinary shares
Class of Stock [Line Items]
Common stock subject to vesting and transfer restrictions (in shares) | shares	6,072,463	6,072,463
Class B ordinary shares | Price Based Lockup Shares
Class of Stock [Line Items]
Common stock, lockup shares (in shares) | shares	1,575,045	1,575,045
Class B ordinary shares | Time-Based Lockup Shares
Class of Stock [Line Items]
Common stock, lockup shares (in shares) | shares	3,510,643	3,510,643
Class B ordinary shares | OpCo
Class of Stock [Line Items]
Common stock subject to vesting and transfer restrictions (in shares) | shares	7,624,999	7,624,999

XML

Basis of Presentation and Significant Accounting Policies - Schedule of Finite-Lived Intangible Assets, Useful Life (Details)	Sep. 30, 2023
Finite-Lived Intangible Assets [Line Items]
Useful Life	20 years
Developed Technology
Finite-Lived Intangible Assets [Line Items]
Useful Life	20 years

XML

Basis of Presentation and Significant Accounting Policies - Schedule of Property, Plant, and Equipment Useful Life (Details)	Sep. 30, 2023
Furniture and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful Life	4 years
Furniture and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful Life	7 years
Demonstration Plant
Property, Plant and Equipment [Line Items]
Useful Life	7 years
Construction in Progress
Property, Plant and Equipment [Line Items]
Useful Life	0 years

XML

Business Combination - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Jun. 07, 2023	Jun. 18, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Asset Acquisition [Line Items]
Interest income (expense)			$ 8,675	$ 0	$ 10,800	$ 4	$ (1,470)
Business acquisition, measurement period			1 year		1 year
OpCo
Asset Acquisition [Line Items]
Business acquisition, transaction costs	$ 121,883					121,883
Business combination, acquisition related costs	16,021
Pre-combination vesting of modified profits interests	325
Pre-combination vesting of unmodified profits interests	651
Deferred tax liability	71,459					$ 71,459
Proceeds from trust, net	661,623
Interest income (expense)			$ 10,800
Business combination, consideration transferred	$ 1,786,259
Public Warrants | OpCo
Asset Acquisition [Line Items]
Class of warrant or right, outstanding (in shares)	8,624,974					8,624,974
Class of warrant or right, number of securities called by warrants or rights (in shares)	8,624,974					8,624,974
Class of warrant or right, exercise price of warrants or rights (in usd per share)	$ 11.50					$ 11.50
Class of warrant or right, redemption price per warrant (in usd per share)	$ 0.01					$ 0.01
Class of warrants or right, convertible, threshold trading days	20 days					20 days
Class of warrants or right, convertible, threshold consecutive trading days	30 days					30 days
Warrants and rights outstanding, term	5 years					5 years
Private Placement Warrants | OpCo
Asset Acquisition [Line Items]
Class of warrant or right, outstanding (in shares)	10,900,000					10,900,000
Class of warrant or right, number of securities called by warrants or rights (in shares)	10,900,000					10,900,000
Class of warrant or right, exercise price of warrants or rights (in usd per share)	$ 11.50					$ 11.50
Warrants and rights outstanding, term	5 years					5 years
Class A Common Stock | OpCo
Asset Acquisition [Line Items]
Common unit, outstanding, vested (in shares)	136,073,365					136,073,365
Common unit, outstanding, unvested (in shares)	1,119,198					1,119,198
Class B ordinary shares | OpCo
Asset Acquisition [Line Items]
Common unit, outstanding, vested (in shares)	136,073,365					136,073,365
Common unit, outstanding, unvested (in shares)	1,119,198					1,119,198
Share Price Equals Or Exceeds Eighteen U.S. Dollars | Class A Common Stock | Public Warrants | OpCo
Asset Acquisition [Line Items]
Share price (in usd per share)	$ 18.00					$ 18.00
Share Price Equals Or Exceeds Ten U.S. Dollars | Class A Common Stock | Public Warrants | OpCo
Asset Acquisition [Line Items]
Share price (in usd per share)	10.00					10.00
Share Price Is Below Eighteen U.S. Dollars | Class A Common Stock | Public Warrants | OpCo
Asset Acquisition [Line Items]
Share price (in usd per share)	$ 18.00					$ 18.00
IPO | RONI
Asset Acquisition [Line Items]
Proceeds from issuance initial public offering		$ 345,000
IPO | Class A Common Stock | OpCo
Asset Acquisition [Line Items]
Share issuances (in shares)	67,352,271

XML

Business Combination - Schedule of Consideration Transferred (Details) - OpCo $ in Thousands	Jun. 07, 2023 USD ($)
Asset Acquisition [Line Items]
Pre-combination vesting of modified profits interests	$ 325
Pre-combination vesting of unmodified profits interests	651
Consideration Transferred to Sellers	976
Class A OpCo Units - non-controlling interests	1,785,283
Fair value of total consideration transferred	$ 1,786,259

XML

Business Combination - Schedule of Assets and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Jun. 07, 2023	Dec. 31, 2022
Long Term Liabilities
Goodwill	$ 423,953	$ 433,736		$ 0
OpCo
Current Assets
Cash			$ 7,946
Prepaid expenses			637
Other current assets			30
Total Current Assets			8,613
Long Term Assets
Intangible assets, net			1,345,000
Property, plant and equipment			91,855
Right-of-use assets			940
Total Long Term Assets			1,437,795
Total Assets Acquired			1,446,408
Current Liabilities
Accounts payable			2,574
Accrued liabilities			7,370
Current lease liability			137
Other current liabilities			1
Total Current Liabilities			10,082
Long Term Liabilities
Deferred tax liability			71,459
Asset retirement obligation			1,967
Long term lease liability			594
Total Long Term Liabilities			74,020
Total Liabilities Assumed			84,102
Total identifiable net assets			1,362,306
Goodwill			423,953
Net assets acquired			$ 1,786,259

XML

Business Combination - Schedule of Pro Forma Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Pro forma revenue	$ 125	$ 208	$ 175	$ 574
Pro forma net loss	(91,966)	(28,964)	(266,123)	(87,558)
Pro forma net loss attributable to non-redeemable controlling interest	(29,981)	(9,442)	(86,756)	(28,544)
Pro forma net loss attributable to non-redeemable non-controlling interests	$ (61,985)	$ (19,522)	$ (179,367)	$ (59,014)

XML

Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Thousands		3 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance		$ 433,736
Measurement Adjustments	$ 9,783	(9,783)
Goodwill, ending balance	$ 423,953	$ 423,953

XML

Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Total	$ 1,324,078
Developed Technology
Finite-Lived Intangible Assets [Line Items]
Developed Technology, gross	1,345,000	$ 604
Accumulated Amortization	(20,922)	(341)
Total	$ 1,324,078	$ 263

XML

Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Measurement Adjustments	$ 9,783	$ (9,783)
Amortization of intangible assets			$ 5	$ 20,922	$ 10	$ 16

XML

Intangible Assets - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2023	$ 16,813
2024	67,250
2025	67,250
2026	67,250
2027	67,250
2028 and thereafter	1,038,265
Total	$ 1,324,078

XML

Property, Plant, and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 91,758	$ 69,595
Furniture and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	253	368
Accumulated Depreciation	(17)	(216)
Property, plant and equipment, net	236	152
Demonstration Plant
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	89,240	128,013
Accumulated Depreciation	(3,955)	(58,570)
Property, plant and equipment, net	85,285	69,443
Construction in Progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 6,237	$ 0

XML

Property, Plant, and Equipment - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Property, Plant and Equipment [Abstract]
Depreciation	$ 3,173	$ 3,266	$ 3,972	$ 5,700	$ 9,797

XML

Property, Plant, and Equipment - Schedule of Asset Retirement Obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Jun. 08, 2023	Jun. 07, 2023	Jan. 01, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Asset Retirement Obligation, gross						$ 2,201
Accumulated Depreciation						(348)
Asset Retirement Obligation, net	$ 2,018	$ 1,977	$ 1,977	$ 2,518	$ 2,416	$ 1,853	$ 2,362	$ 2,308

XML

Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Accrued Incentive Compensation	$ 1,023	$ 1,451
Accrued cash-based expense of Original JDA and Amended and Restated JDA	2,748	0
Accrued Legal Service Provider Fees	1,731	645
Other Accrued Liabilities	1,929	296
Total Accrued Liabilities	$ 7,431	$ 2,392

XML

Trade Receivables and Allowance for Doubtful Accounts - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Receivables [Abstract]
Trade Receivables, gross	$ 0	$ 352
Allowance for Doubtful Accounts	0	0
Trade Receivables, net	$ 0	$ 352

XML

Trade Receivables and Allowance for Doubtful Accounts - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Receivables [Abstract]
Bad debt expense	$ 0	$ 0	$ 352	$ 0

XML

Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended	4 Months Ended	5 Months Ended	9 Months Ended
	Jun. 07, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022	Jun. 08, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Due to related parties			$ 288				$ 178
Due to related parties			0				2,212
Related Party
Related Party Transaction [Line Items]
Due to related parties			288				178
Due to related parties			0				$ 2,212
Related Party | Marketing, Patent Administration, And Technology Maintenance Services
Related Party Transaction [Line Items]
Related party, amounts of transaction		$ 47	51	$ 79	$ 183
Related Party | General Business Oversight
Related Party Transaction [Line Items]
Related party, amounts of transaction		$ 184	$ 433	$ 530	$ 790
Related Party | Occidental Petroleum
Related Party Transaction [Line Items]
Class of warrant or right, outstanding (in shares)	247,655			247,655		711,111
Warrant liability	$ 79,054			$ 79,054
Stock issued during period, shares, conversion of units (in shares)	7,905,279

XML

Fair Value Measurement - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
Short term investments	$ 100,000	$ 0
Liabilities
Warrant liability	140,534	0
Earnout shares liability	4,546	0
Option liability	0	5,174
Fair Value, Recurring
Assets
Short term investments	100,000
Total	100,000
Liabilities
Earnout shares liability	4,546
Total	145,080	5,174
Fair Value, Recurring | Public Warrants
Liabilities
Warrant liability	37,420
Fair Value, Recurring | Private Placement Warrants
Liabilities
Warrant liability	103,114
Option Liability | Fair Value, Recurring
Liabilities
Option liability		5,174
Level 1 | Fair Value, Recurring
Assets
Short term investments	0
Total	0
Liabilities
Earnout shares liability	0
Total	37,420	0
Level 1 | Fair Value, Recurring | Public Warrants
Liabilities
Warrant liability	37,420
Level 1 | Fair Value, Recurring | Private Placement Warrants
Liabilities
Warrant liability	0
Level 1 | Option Liability | Fair Value, Recurring
Liabilities
Option liability		0
Level 2 | Fair Value, Recurring
Assets
Short term investments	100,000
Total	100,000
Liabilities
Earnout shares liability	0
Total	0	0
Level 2 | Fair Value, Recurring | Public Warrants
Liabilities
Warrant liability	0
Level 2 | Fair Value, Recurring | Private Placement Warrants
Liabilities
Warrant liability	0
Level 2 | Option Liability | Fair Value, Recurring
Liabilities
Option liability		0
Level 3 | Fair Value, Recurring
Assets
Short term investments	0
Total	0
Liabilities
Earnout shares liability	4,546
Total	107,660	5,174
Level 3 | Fair Value, Recurring | Public Warrants
Liabilities
Warrant liability	0
Level 3 | Fair Value, Recurring | Private Placement Warrants
Liabilities
Warrant liability	$ 103,114
Level 3 | Option Liability | Fair Value, Recurring
Liabilities
Option liability		$ 5,174

XML

Fair Value Measurement - Reconciliation of Level 3 Fair Value of Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance of recurring level 3 liabilities at beginning of period	$ 63,187	$ 1,854	$ 63,851	$ 5,174	$ 1,459
Total gains and losses during the period included in Other Income (Expense)	52,352	0	51,688	0	395
Issuances	7,879	0	7,879	0	0
Payments	0	0	0	(5,174)	0
Transfers into level 3	0	0	0	0	0
Transfers out of level 3	0	0	0	0	0
Balance of recurring level 3 liabilities at end of period	$ 107,660	$ 1,854	$ 107,660	$ 63,851	$ 1,854

XML

Fair Value Measurement - Narrative (Details) $ in Thousands			1 Months Ended	4 Months Ended	5 Months Ended
	Feb. 03, 2023 shares	Jan. 11, 2023 shares	Feb. 03, 2023 USD ($)	Sep. 30, 2023 USD ($) yr	Jun. 07, 2023 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Proceeds from exercise of option liabilities | $			$ 5,836
Loans
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Interest expense, debt | $				$ 0	$ 30
Occidental Petroleum
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Stock issued during period, shares, conversion of convertible securities (in shares) | shares		5,824
Constellation
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Stock issued during period, shares, conversion of convertible securities (in shares) | shares	28,764
Monte Carlo Simulation | Measurement Input, Expected Term
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Business combination, contingent consideration, liability, measurement input | yr				3
Monte Carlo Simulation | Measurement Input, Risk Free Interest Rate
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Business combination, contingent consideration, liability, measurement input				0.048
Monte Carlo Simulation | Measurement Input, Operating Asset Volatility
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Business combination, contingent consideration, liability, measurement input				0.625
Black-Scholes Merton Model | Measurement Input, Expected Term
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Warrants and rights outstanding, measurement input				5
Black-Scholes Merton Model | Measurement Input, Risk Free Interest Rate
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Warrants and rights outstanding, measurement input				0.045
Black-Scholes Merton Model | Measurement Input, Offered Price
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Warrants and rights outstanding, measurement input				15.10
Black-Scholes Merton Model | Measurement Input, Price Volatility
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Warrants and rights outstanding, measurement input				0.640
Black-Scholes Merton Model | Measurement Input, Strike Price
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Warrants and rights outstanding, measurement input				11.50

XML

Net Loss per Share and Net Loss per Unit - Schedule of Antidilutive Securities Excluded From Computation of Earnings Per Share (Successor) (Details) - shares	4 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	164,080,464	1,195,712
Public Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	8,622,235
Private Placement Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	10,900,000
Earnout Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	328,925
BHES Bonus Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	2,068,416
Common Stock | Unvested Class A OpCo Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	972,522
Common Stock | Class A Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	140,747,943
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	440,423

XML

Net Loss per Share and Net Loss per Unit - Schedule of Earnings Per Share, Basic, and Diluted, For Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Numerator
Comprehensive Loss	$ (30,564)	$ (12,220)	$ (65,564)	$ (34,176)	$ (37,335)
Net loss attributable to shareholders	$ (30,564)	$ (12,220)	$ (65,564)	$ (34,176)	$ (37,335)
Denominator
Weighted-average number shares outstanding, diluted (in shares)	68,966,972	1,143,430	68,644,032	3,766,871	2,838,388
Weighted-average number shares outstanding, basic (in shares)	68,966,972	1,143,430	68,644,032	3,766,871	2,838,388
Net loss per unit attributable to shareholders, diluted (in usd per share)	$ (0.44)	$ (10.69)	$ (0.96)	$ (9.07)	$ (13.15)
Net loss per unit attributable to shareholders, basic (in usd per share)	$ (0.44)	$ (10.69)	$ (0.96)	$ (9.07)	$ (13.15)
Class A Common Stock
Numerator
Comprehensive Loss			$ (202,551)
Net loss attributable to shareholders			$ (65,564)
Denominator
Weighted-average number shares outstanding, diluted (in shares)			68,644,032
Weighted-average number shares outstanding, basic (in shares)			68,644,032
Net loss per unit attributable to shareholders, diluted (in usd per share)			$ (0.96)
Net loss per unit attributable to shareholders, basic (in usd per share)			$ (0.96)

XML

Net Loss per Share and Net Loss per Unit - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Predecessor) (Details) - shares	4 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	164,080,464	1,195,712
Profits Interests
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)		450,013
Member Loan Share Options
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)		34,588
Occidental Petroleum Share Options
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)		711,111

XML

Net Loss per Share and Net Loss per Unit - Schedule of Earnings Per Share, Basic and Diluted, For Membership Interests (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Numerator
Comprehensive Loss	$ (30,564)	$ (12,220)	$ (65,564)	$ (34,176)	$ (37,335)
Net loss attributable to shareholders	$ (30,564)	$ (12,220)	$ (65,564)	$ (34,176)	$ (37,335)
Denominator
Weighted-average number shares outstanding, basic (in shares)	68,966,972	1,143,430	68,644,032	3,766,871	2,838,388
Weighted-average number shares outstanding, diluted (in shares)	68,966,972	1,143,430	68,644,032	3,766,871	2,838,388
Net loss per unit attributable to shareholders, basic (in usd per share)	$ (0.44)	$ (10.69)	$ (0.96)	$ (9.07)	$ (13.15)
Net loss per unit attributable to shareholders, diluted (in usd per share)	$ (0.44)	$ (10.69)	$ (0.96)	$ (9.07)	$ (13.15)

XML

Shareholders' Equity, Non-Controlling Interest and Members' Equity - Additional Information (Details) - $ / shares	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Jun. 30, 2023	Jun. 07, 2023	Dec. 31, 2022	Sep. 30, 2022
Class of Stock [Line Items]
Stockholders' equity, shares authorized (in shares)	831,000,000	831,000,000
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)						4,987,845
Preferred stock, shares outstanding (in shares)	0	0
Common stock (in shares)						3,718,931
Common stock, shares, issued (in shares)						3,718,931
Lockup shares, shares vested, percentage	67.00%	67.00%
Price Based Lockup Shares
Class of Stock [Line Items]
Common stock, remaining shares subject to vesting and transfer restrictions (in shares)	14,848,184	14,848,184
Lockup shares, shares, lockup provision removed, percentage	67.00%	67.00%
Class A Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	520,000,000	520,000,000			520,000,000
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001			$ 0.0001
Common stock (in shares)	71,014,190	71,014,190			0
Redeemable non-controlling interests in subsidiary	0	0	0	34,500,000
Common stock, shares, issued (in shares)	71,014,190	71,014,190			0
Class A Common Stock | OpCo
Class of Stock [Line Items]
Common stock, remaining shares subject to vesting and transfer restrictions (in shares)	328,925	328,925
Class A Common Stock | Earnout Shares Vesting, Tranche One
Class of Stock [Line Items]
Volume weighted average stock price trigger (in usd per share)	$ 12.00	$ 12.00
Class A Common Stock | Earnout Shares Vesting, Tranche Two
Class of Stock [Line Items]
Volume weighted average stock price trigger (in usd per share)	$ 14.00	$ 14.00
Class A Common Stock | Common Stock
Class of Stock [Line Items]
Common stock (in shares)	71,014,190	71,014,190	67,352,271	0
Redeemable non-controlling interests in subsidiary	140,228,066	140,228,066
Class B ordinary shares
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	310,000,000	310,000,000			310,000,000
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001			$ 0.0001
Common stock (in shares)	141,529,513	141,529,513
Common stock, shares, issued (in shares)	141,529,513	141,529,513
Class B ordinary shares | Common Stock
Class of Stock [Line Items]
Common stock (in shares)	141,529,513	141,529,513	142,711,590	0
Redeemable non-controlling interests in subsidiary	6,967,050	6,967,050

XML

Shareholders' Equity, Non-Controlling Interest and Members' Equity - Summary of Calculation of Non-Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Class of Stock [Line Items]
Net Loss before Income Tax	$ (91,976)	$ (12,220)	$ (203,232)	$ (34,176)	$ (37,335)
Class A Common Stock
Class of Stock [Line Items]
Redeemable non-controlling interest percentage of common units	67.40%		67.30%
Comprehensive loss attributable to common units	$ (61,402)		$ (136,987)

XML

Share-Based Payments - Narrative (Details) $ in Thousands		3 Months Ended	9 Months Ended	12 Months Ended
	Jun. 08, 2023 USD ($) shares	Sep. 30, 2023 USD ($) shares	Sep. 30, 2023 USD ($) shares	Dec. 31, 2022 USD ($)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Remaining Compensation Cost | $	$ 6,788	$ 3,300	$ 3,300	$ 9,312
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition			3 years	1 year
Restricted Stock Units (RSUs)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Remaining Compensation Cost | $		$ 5,491	$ 5,491
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition			3 years
OpCo
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Accelerated (in shares)	30,000
Share-based payment arrangement, accelerated cost | $	$ 1,624
Share-based compensation arrangement by share-based payment award, equity instruments other than options, forfeited in period (in shares)	30,000
BHES
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Gain (loss) on stock issued during period, value, issued for services | $	$ 17,500
Gain (loss) on stock issued during period, value, issued for services, inception-to-date | $	$ 2,053
Class A Common Stock | OpCo
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock issued during period, shares, acquisitions (in shares)	451,356
Shares issued, shares, share-based payment arrangement, forfeited (in shares)	324,625
Class A Common Stock | BHES
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock issued during period, shares, conversion of units (in shares)	1,500,265
Class B ordinary shares | OpCo
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock issued during period, shares, acquisitions (in shares)	451,356
Shares issued, shares, share-based payment arrangement, forfeited (in shares)	324,625
Class B ordinary shares | BHES
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock issued during period, shares, conversion of units (in shares)	1,500,265
Omnibus Incentive Plan | Restricted Stock Units (RSUs)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment, number of shares authorized (in shares)		440,424	440,424
Share-based payments, award vesting period		3 years
Omnibus Incentive Plan | Class A Common Stock
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares reserved for future issuance, percentage		0.05	0.05
Shares reserved for future issuance, annual increase, percentage		20,468,545	20,468,545
Joint Development Agreement | BHES
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock issued during period, shares, acquisitions (in shares)	47,000

XML

Share-Based Payments - Schedule of Equity Awards Activity (Details) - $ / shares	4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2023
Common Stock
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Unvested equity awards at the beginning of the period (in shares)	1,895,122
Granted (in shares)	0
Forfeited (in shares)	(324,568)
Redeemed (in shares)	0
Accelerated (in shares)	(598,032)
Unvested equity awards at the end of the period (in shares)	972,522	1,895,122	972,522
Unvested equity awards at the beginning of the period (in dollars per share)	$ 4.95
Granted (in dollars per share)	0
Forfeited (in dollars per share)	5.66
Redeemed (in dollars per share)	0
Accelerated (in dollars per share)	4.32
Unvested equity awards at the end of the period (in dollars per share)	$ 4.45	$ 4.95	$ 4.45
Membership Interests
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Unvested equity awards at the beginning of the period (in shares)	119,076	226,494	226,494
Granted (in shares)		0
Forfeited (in shares)		0
Redeemed (in shares)		(107,418)
Accelerated (in shares)		0
Unvested equity awards at the end of the period (in shares)		119,076
Unvested equity awards at the beginning of the period (in dollars per share)	$ 63.32	$ 63.25	$ 63.25
Granted (in dollars per share)		0
Forfeited (in dollars per share)		0
Redeemed (in dollars per share)		63.18
Accelerated (in dollars per share)		0
Unvested equity awards at the end of the period (in dollars per share)		$ 63.32

XML

Share-Based Payments - Schedule of Restricted Stock Unit Activity (Details) - $ / shares	4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2023
Common Stock
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Unvested equity awards at the beginning of the period (in shares)	1,895,122
Granted (in shares)	0
Forfeited (in shares)	(324,568)
Redeemed (in shares)	0
Accelerated (in shares)	(598,032)
Unvested equity awards at the end of the period (in shares)	972,522	1,895,122	972,522
Unvested equity awards at the beginning of the period (in dollars per share)	$ 4.95
Granted (in dollars per share)	0
Forfeited (in dollars per share)	5.66
Redeemed (in dollars per share)	0
Accelerated (in dollars per share)	4.32
Unvested equity awards at the end of the period (in dollars per share)	$ 4.45	$ 4.95	$ 4.45
Membership Interests
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Unvested equity awards at the beginning of the period (in shares)	119,076	226,494	226,494
Granted (in shares)		0
Forfeited (in shares)		0
Redeemed (in shares)		(107,418)
Accelerated (in shares)		0
Unvested equity awards at the end of the period (in shares)		119,076
Unvested equity awards at the beginning of the period (in dollars per share)	$ 63.32	$ 63.25	$ 63.25
Granted (in dollars per share)		0
Forfeited (in dollars per share)		0
Redeemed (in dollars per share)		63.18
Accelerated (in dollars per share)		0
Unvested equity awards at the end of the period (in dollars per share)		$ 63.32
Restricted Stock Units (RSUs) | Common Stock
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Unvested equity awards at the beginning of the period (in shares)	0
Granted (in shares)	440,424
Forfeited (in shares)	0
Redeemed (in shares)	0
Accelerated (in shares)	0
Unvested equity awards at the end of the period (in shares)	440,424	0	440,424
Unvested equity awards at the beginning of the period (in dollars per share)	$ 0
Granted (in dollars per share)	13.43
Forfeited (in dollars per share)	0
Redeemed (in dollars per share)	0
Accelerated (in dollars per share)	0
Unvested equity awards at the end of the period (in dollars per share)	$ 13.43	$ 0	$ 13.43
Restricted Stock Units (RSUs) | Membership Interests
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Unvested equity awards at the beginning of the period (in shares)	0	0	0
Granted (in shares)		0
Forfeited (in shares)		0
Redeemed (in shares)		0
Accelerated (in shares)		0
Unvested equity awards at the end of the period (in shares)		0
Unvested equity awards at the beginning of the period (in dollars per share)	$ 0	$ 0	$ 0
Granted (in dollars per share)		0
Forfeited (in dollars per share)		0
Redeemed (in dollars per share)		0
Accelerated (in dollars per share)		0
Unvested equity awards at the end of the period (in dollars per share)		$ 0

XML

Share-Based Payments - Schedule of Share-Based Payments Issued to BHES (Details) - BHES - Original JDA and Amended and Restated JDA - USD ($) $ / shares in Units, $ in Thousands	4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2023
Quantity
Membership Interests (in shares)	0	9,210
Total Fair Value
Membership Interests	$ 0	$ 1,943
Stock issued during period, value, issued for services	$ 3,585	$ 3,901
Membership interests, fair value or equivalent value per unit (in dollars per share)			$ 168.75
Class A Common Stock
Quantity
Stock issued during period, shares, issued for services (in shares)	542,324	296,160
Total Fair Value
Stock issued during period, value, issued for services	$ 3,585	$ 1,958
Share-based compensation, common stock, fair value or equivalent value per unit (in dollars per share)			5.29
Class B ordinary shares
Quantity
Stock issued during period, shares, issued for services (in shares)	542,324	296,160
Total Fair Value
Stock issued during period, value, issued for services	$ 0	$ 0
Share-based compensation, common stock, fair value or equivalent value per unit (in dollars per share)			$ 0

XML

Share-Based Payments - Schedule of Compensation Payable to BHES (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 08, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Compensation Cost Incurred To Date		$ 20,557
Remaining Compensation Cost	$ 3,300	6,788	$ 9,312
Total Compensation Cost		$ 27,345

XML

Leases (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Oct. 06, 2023	Jun. 08, 2023	Dec. 31, 2022	Jun. 06, 2022
Lessee, Lease, Description [Line Items]
Lessee, operating lease, discount rate					8.00%
Lease right-of-use asset	$ 181,000			$ 784,000
Measurement Building Lease
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract					60 months
Operating lease, liability	3,000
Lease right-of-use asset	3,000
Roney St. Lease | Subsequent Event
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract		62 months
Operating lease, liability		$ 2,168,000
Lease right-of-use asset		$ 2,144,000
Land
Lessee, Lease, Description [Line Items]
Lease right-of-use asset			$ 210,000
Operating lease, annual lease payment	$ 1

XML

Commitments and Contingencies - Reconciliation of Asset Retirement Obligations (Details) - USD ($) $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset retirement obligation, beginning of period	$ 1,977	$ 2,308	$ 2,518	$ 1,853
Obligation incurred	0	0	0	0	$ 2,201
Periodic accretion expense	41	54	41	102	161
Asset retirement obligation, end of period	$ 2,018	$ 2,362	$ 2,018	$ 2,518	$ 2,362

XML

Commitment and Contingencies - Schedule of Unconditional Purchase Obligations (Details) - USD ($) $ in Thousands	4 Months Ended	5 Months Ended	12 Months Ended
	Sep. 30, 2023	Jun. 07, 2023	Dec. 31, 2022
Unrecorded Unconditional Purchase Obligation [Line Items]
Gross Commitment	$ 144,700
Unrecorded unconditional purchase obligation, recognized in current period	6,452	$ 8,191	$ 4,976
Remaining Commitment	125,081
Asset Purchase Commitment | Cash
Unrecorded Unconditional Purchase Obligation [Line Items]
Gross Commitment	4,700
Unrecorded unconditional purchase obligation, recognized in current period	0	1,168	0
Remaining Commitment	3,532
Joint Development Agreements, Paid In Cash
Unrecorded Unconditional Purchase Obligation [Line Items]
Gross Commitment	70,000
Unrecorded unconditional purchase obligation, recognized in current period	2,867	3,121	2,211
Remaining Commitment	61,801
Joint Development Agreements, Paid In Share-Based Payments
Unrecorded Unconditional Purchase Obligation [Line Items]
Gross Commitment	70,000
Unrecorded unconditional purchase obligation, recognized in current period	3,585	$ 3,902	$ 2,765
Remaining Commitment	$ 59,748

XML

Commitments and Contingencies - Schedule of Unrecognized Purchase Commitments (Details) - USD ($) $ in Thousands	4 Months Ended	5 Months Ended	12 Months Ended
	Sep. 30, 2023	Jun. 07, 2023	Dec. 31, 2022
Other Commitments [Line Items]
Gross Commitment	$ 144,700
Unrecorded unconditional purchase obligation, recognized in current period	6,452	$ 8,191	$ 4,976
Remaining Commitment	125,081
Joint Development Agreements, Paid In Cash
Other Commitments [Line Items]
Gross Commitment	70,000
Unrecorded unconditional purchase obligation, recognized in current period	2,867	3,121	2,211
Remaining Commitment	61,801
Joint Development Agreements, Paid In Share-Based Payments
Other Commitments [Line Items]
Gross Commitment	70,000
Unrecorded unconditional purchase obligation, recognized in current period	3,585	3,902	2,765
Remaining Commitment	59,748
Cash | Asset Purchase Commitment
Other Commitments [Line Items]
Gross Commitment	4,700
Unrecorded unconditional purchase obligation, recognized in current period	0	$ 1,168	$ 0
Remaining Commitment	$ 3,532

XML

Commitments and Contingencies - Schedule of Costs Associated with JDA (Details) - BHES - USD ($)	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Other Commitments [Line Items]
Cash expense	$ 2,748,000	$ 578,000	$ 2,867,000	$ 3,121,000	$ 1,256,000
Plus: Class A OpCo Units Issued					30,000,000
Plus: BHES Bonus Share expense	819,000	2,688,000	6,010,000	4,690,000	1,570,000
Research and development	7,003,000	3,989,000	12,462,000	11,713,000	9,760,000
Membership Interests
Other Commitments [Line Items]
Plus: Class A OpCo Units Issued	0	723,000	0	3,902,000	6,934,000
Common Stock
Other Commitments [Line Items]
Plus: Class A OpCo Units Issued	$ 3,436,000	$ 0	$ 3,585,000	$ 0	$ 0

XML

Income Taxes - Schedule of Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Jun. 07, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ (10)	$ 0	$ (681)	$ 0	$ 0
Effective tax rate			0.30%

XML

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
TRA liability	$ 9,376	$ 0

XML

Subsequent Events (Details) - USD ($) $ in Thousands	Oct. 06, 2023	Sep. 30, 2023	Dec. 31, 2022
Subsequent Event [Line Items]
Lease right-of-use asset		$ 181	$ 784
Subsequent Event | Roney St. Lease
Subsequent Event [Line Items]
Operating lease, liability	$ 2,168
Lease right-of-use asset	2,144
Lessee, operating lease, liability, to be paid	$ 2,623

XML

Label	Element	Value
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 357,019,000