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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

For the quarterly period ended September 30, 2025

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, North Carolina			27701
(Address of Principal Executive Offices)			(Zip Code)

(919) 287-4750

Registrant’s telephone number, including area code

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-WT			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 every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No o

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

Large accelerated filer			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 Exchange Act). Yes o No x

The registrant had outstanding 83,919,757 shares of Class A Common Stock and 138,222,322 shares of Class B Common Stock as of November 11, 2025.

---

TABLE OF CONTENTS

						Page
			Certain Defined Terms			1
			Cautionary Note Regarding Forward-Looking Statements			2
PART I.			FINANCIAL INFORMATION
Item 1.			Financial Statements (Unaudited)			3
			Condensed Consolidated Balance Sheets			3
			Condensed Consolidated Statements of Operations and Comprehensive Loss			5
			Condensed Consolidated Statements of Mezzanine Shareholders' Equity and Shareholders' Equity			6
			Condensed Consolidated Statements of Cash Flows			8
			Notes to Condensed Consolidated Financial Statements			10
Item 2.			Management’s Discussion and Analysis of Financial Condition and Results of Operations			27
Item 3.			Quantitative and Qualitative Disclosures About Market Risk			36
Item 4.			Controls and Procedures			36
PART II.			OTHER INFORMATION
Item 1.			Legal Proceedings			38
Item 1A.			Risk Factors			38
Item 2.			Unregistered Sales of Equity Securities and Use of Proceeds			39
Item 3.			Defaults Upon Senior Securities			39
Item 4.			Mine Safety Disclosures			39
Item 5.			Other Information			39
Item 6.			Exhibits			40
Signatures						41

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Certain Defined Terms

For the definitions of certain defined terms used throughout this Quarterly Report on Form 10-Q (this “Report”), please refer to the section entitled “Certain Defined Terms” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (the “Annual Report”).

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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 project 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: (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 Company’s ability to utilize its net operating loss and tax credit carryforwards effectively;(iii) the capital-intensive nature of the Company’s business model, which will likely require Net Power to raise additional capital in the future; (iv) barriers the Company may face in its attempts to deploy and commercialize its technology; (v) the complexity of the machinery the Company relies on for its operations and development; (vi) the Company’s ability to adequately control or accurately predict the costs associated with its projects; (vii) barriers that the Company may face in its attempts to deploy projects; (viii) risks related to the Company’s strategic decision to broaden the scope of its business; the complexity of the machinery the Company relies on for its operations and development; (ix) potential changes and/or delays in site selection and construction that result from regulatory, logistical, and financing challenges; (x) the ability of the Company to integrate other energy technologies in its projects; (xi) the Company’s ability to establish and maintain supply relationships; (xii) Net Power’s reliance on the licensing of third party technology for its projects; (xiii) risks related to strategic investors and partners; (xiv) the Company’s ability to successfully commercialize its operations; (xv) the availability and cost of technological components and raw materials for its projects; (xvi) the impact of potential delays in discovering manufacturing and construction issues; (xvii) the ability of Net Power’s commercial plants to efficiently provide net power output; (xviii) the impact of public perception of fossil fuel-derived energy on the Company’s business; (xix) any political or other disruptions in gas producing nations; (xx) risks relating to data privacy and cybersecurity, including the potential for cyberattacks or security incidents that could disrupt our or our service providers’ operations; (xxi) current and potential litigation that has been and may be instituted against the Company; and (xxii) other risks and uncertainties indicated in Part I, Item 1A of the Annual Report 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.

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Part I - Financial Information

Item 1. Financial Statements

NET Power Inc.

Condensed Consolidated Balance Sheets (Unaudited)

In thousands, except par value

						September 30,						December 31,
						2025						2024
ASSETS
Current assets
Cash and cash equivalents						$	229,315					$	329,230
Short-term investments						—						100,000
Investments in securities, available-for-sale						136,078						78,344
Interest receivable						1,470						3,682
Prepaid expenses and other current assets						2,727						1,774
Total current assets						369,590						513,030
Long-term assets
Restricted cash						2,482						2,446
Investments in securities, available-for-sale						56,144						22,628
Intangible assets, net						184,051						1,241,343
Goodwill						—						359,847
Property, plant, and equipment, net						16,345						151,470
Operating lease right-of-use assets						589						2,699
Other long-term assets						694						652
Total assets						$	629,895					$	2,294,115
LIABILITIES, MEZZANINE SHAREHOLDERS' EQUITY, AND SHAREHOLDERS' EQUITY
Current liabilities
Accounts payable						$	1,314					$	3,092
Accrued liabilities						11,460						7,407
Due to related parties						8,222						6,537
Operating lease liabilities, current portion						1,066						683
Finance lease liabilities, current portion						172						187
Earnout Shares liability						55						—
Total current liabilities						22,289						17,906
Earnout Shares liability						—						1,958
Warrant liability						16,929						81,283
Asset retirement obligation						3,511						3,265
Non-current operating lease liabilities						2,776						2,125
Non-current finance lease liabilities						—						110
Tax Receivable Agreement liability						—						20,974
Deferred taxes						1,902						4,306
Total liabilities						47,407						131,927
Commitments and contingencies (Note 15)

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

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NET Power Inc.

Condensed Consolidated Balance Sheets (Unaudited) (Continued)

In thousands, except par value

						September 30,						December 31,
						2025						2024
Mezzanine shareholders' equity
Redeemable non-controlling interests in subsidiary						438,726						1,506,584
Shareholders' equity
Preferred Stock, $.0001 par value; 1,000 shares authorized; no shares issued or outstanding as of September 30, 2025 and December 31, 2024						—						—
Class A Common Stock, $.0001 par value; 520,000 shares authorized; 77,883 shares issued and outstanding as of September 30, 2025 and 76,760 shares issued and outstanding as of December 31, 2024						8						8
Class B Common Stock, $.0001 par value; 310,000 shares authorized; 142,902 shares issued and outstanding as of September 30, 2025 and 139,691 shares issued and outstanding as of December 31, 2024						14						14
Additional paid-in capital						818,655						771,594
Accumulated other comprehensive loss						119						32
Accumulated deficit						(675,034)						(116,044)
Total shareholders' equity						143,762						655,604
Total liabilities, mezzanine shareholders' equity, and shareholders' equity						$	629,895					$	2,294,115

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

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NET Power Inc.

Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited)

In thousands, except per share data

						Three Months Ended September 30,												Nine Months Ended September 30,
						2025						2024						2025						2024
Revenue						$	—					$	12					$	—					$	250
Cost of revenue						—						1						—						31
Gross profit						—						11						—						219
Operating expenses
General and administrative						9,108						8,448						31,378						22,643
Sales and marketing						1,395						1,032						4,074						2,660
Research and development						24,543						17,333						73,761						44,083
Project development						10,032						233						41,719						1,426
Impairment and other charges						1,095,839						—						1,511,735						—
Depreciation, amortization, and accretion						15,580						20,210						58,936						60,289
Total operating expenses						1,156,497						47,256						1,721,603						131,101
Operating loss						(1,156,497)						(47,245)						(1,721,603)						(130,882)
Other income (expense)
Interest income						4,835						7,992						16,179						24,712
Change in Earnout Shares liability and Warrant liability						(9,323)						27,690						66,257						29,361
Change in Tax Receivable Agreement liability						—						—						21,317						—
Other income						2						3						8						10
Net other income (expense)						(4,486)						35,685						103,761						54,083
Net loss before income tax						(1,160,983)						(11,560)						(1,617,842)						(76,799)
Income tax benefit						1,177						4,746						2,403						11,137
Net loss after income tax						(1,159,806)						(6,814)						(1,615,439)						(65,662)
Net loss attributable to non-controlling interests						(748,308)						(7,632)						(1,056,449)						(50,791)
Net income (loss) attributable to NET Power Inc.						$	(411,498)					$	818					$	(558,990)					$	(14,871)
Other comprehensive income
Unrealized gain on investments						163						528						245						461
Total other comprehensive income						163						528						245						461
Comprehensive loss						(1,159,643)						(6,286)						(1,615,194)						(65,201)
Comprehensive loss attributable to non-controlling interests						(748,203)						(7,284)						(1,056,291)						(50,487)
Comprehensive income (loss) attributable to NET Power Inc.						$	(411,440)					$	998					$	(558,903)					$	(14,714)
Earnings (loss) per share of Class A Common Stock, basic and diluted						$	(5.28)					$	0.01					$	(7.21)					$	(0.21)
Weighted average shares of Class A Common Stock, basic and diluted						77,883						73,537						77,530						72,541

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

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NET Power Inc.

Condensed Consolidated Statements of Mezzanine Shareholders' Equity and Shareholders' Equity (Unaudited)

In thousands

						Class A Common Stock												Class B Common Stock												Additional Paid-in Capital						Accumulated Other Comprehensive Income (Loss)						Accumulated Deficit									Total Shareholders' Equity						Non-controlling Interests - Mezzanine Equity
						Shares						Amount						Shares						Amount
Balance at December 31, 2024						76,760						$	8					139,691						$	14					$	771,594					$	32					$	(116,044)								$	655,604					$	1,506,584
Redemption of Class B Common Stock						300						—						(300)						—						1,489						—						—									1,489						(1,489)
Issuance of Class A Common Stock and reallocation of book value						3						—						—						—						41						—						—									41						(14)
Increase in Tax Receivable Agreement liability from qualifying exchanges						—						—						—						—						(343)						—						—									(343)						—
Unrealized gain on investments						—						—						—						—						—						6						—									6						10
Amortization of share-based payments						—						—						1,175						—						1,172						—						—									1,172						9,053
Adjustment of redeemable non-controlling interest to book value						—						—						—						—						98,592						—						—									98,592						(98,592)
Net loss						—						—						—						—						—						—						(119,350)									(119,350)						(254,236)
Balance at March 31, 2025						77,063						$	8					140,566						$	14					$	872,545					$	38					$	(235,394)								$	637,211					$	1,161,316
Redemption of Class B Common Stock						473						—						(474)						—						2,148						—						—									2,148						(2,148)
Issuance of Class A Common Stock and reallocation of book value						343						—						—						—						1,553						—						—									1,553						(1,559)
Unrealized gain on investments						—						—						—						—						—						23						—									23						43
Amortization of share-based payments						—						—						1,248						—						3,407						—						—									3,407						10,532
Net loss						—						—						—						—						—						—						(28,142)									(28,142)						(53,905)
Balance at June 30, 2025						77,879						$	8					141,340						$	14					$	879,653					$	61					$	(263,536)								$	616,200					$	1,114,279
Redemption of Class B Common Stock						—						—												—						—						—						—									—						—
Issuance of Class A Common Stock and reallocation of book value						4						—						—						—						(875)						—						—									(875)						870
Unrealized gain on investments						—						—						—						—						—						58						—									58						105
Amortization of share-based payments						—						—						1,562						—						2,511						—						—									2,511						9,146
Adjustment of redeemable non-controlling interest to redemption value						—						—						—						—						(62,634)						—						—									(62,634)						62,634
Net loss						—						—						—						—						—						—						(411,498)									(411,498)						(748,308)
Balance at September 30, 2025						77,883						$	8					142,902						$	14					$	818,655					$	119					$	(675,034)								$	143,762					$	438,726

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

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NET Power Inc.

Condensed Consolidated Statements of Mezzanine Shareholders' Equity and Shareholders' Equity (Unaudited) (Continued)

In thousands

						Class A Common Stock												Class B Common Stock												Additional Paid-in Capital						Accumulated Other Comprehensive Income						Accumulated Deficit						Total Shareholders' Equity						Non-controlling Interests - Mezzanine Equity
						Shares						Amount						Shares						Amount
Balance at December 31, 2023						71,278						$	7					141,788						$	14					$	851,841					$	—					$	(66,853)					$	785,009					$	1,545,905
Redemption of Class B Common Stock						680						—						(680)						—						74						—						—						74						(74)
Issuance of Class A Common Stock and reallocation of book value						12						—						—						—						4,032						—						—						4,032						(4,005)
Tax Receivable Agreement, net of deferred taxes						—						—						—						—						(567)						—						—						(567)						—
Unrealized gain on investments						—						—						—						—						—						224						—						224						438
Amortization of share-based payments						—						—						694						—						647						—						—						647						5,622
Adjustment of redeemable non-controlling interest to redemption value						—						—						—						—						(118,225)						—						—						(118,225)						118,225
Net loss						—						—						—						—						—						—						(11,421)						(11,421)						(30,211)
Balance at March 31, 2024						71,970						$	7					141,802						$	14					$	737,802					$	224					$	(78,274)					$	659,773					$	1,635,900
Redemption of Class B Common Stock						611						—						(611)						—						708						—						—						708						(708)
Issuance of Class A Common Stock and reallocation of book value						2						—						—						—						29						—						—						29						(3)
Exercise of Warrants						1						—						—						—						10						—						—						10						—
Tax Receivable Agreement, net of deferred taxes						—						—						—						—						674						—						—						674						—
Unrealized loss on investments						—						—						—						—						—						(291)						—						(291)						(568)
Amortization of share-based payments						—						—						650						—						1,114						—						—						1,114						7,417
Adjustment of redeemable non-controlling interest to redemption value, net of deferred taxes						—						—						—						—						72,746						—						—						72,746						(118,225)
Net loss						—						—						—						—						—						—						(4,268)						(4,268)						(12,949)
Balance at June 30, 2024						72,584						$	7					141,841						$	14					$	813,083					$	(67)					$	(82,542)					$	730,495					$	1,510,864
Redemption of Class B Common Stock						2,612						—						(2,612)						—						28,447						—						—						28,447						(28,447)
Issuance of Class A Common Stock and reallocation of book value						48						—						—						—						425						—						—						425						(529)
Tax Receivable Agreement, net of deferred taxes						—						—						—						—						5,803						—						—						5,803						—
Tax-related partnership distribution payable						—						—						—						—						—						—						—						—						(4,130)
Unrealized gain on investments						—						—						—						—						—						179						—						179						349
Amortization of share-based payments						—						—						942						—						1,308						—						—						1,308						7,761
Net loss						—						—						—						—						—						—						818						818						(7,632)
Balance at September 30, 2024						75,244						$	7					140,171						$	14					$	849,066					$	112					$	(81,724)					$	767,475					$	1,478,236

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

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NET Power Inc.

Condensed Consolidated Statements of Cash Flows (Unaudited)

In thousands

						Nine Months Ended September 30,
						2025						2024
Cash flows from operating activities:
Net loss after income tax						$	(1,615,439)					$	(65,662)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, amortization, and accretion						58,936						60,289
Impairment and other charges						1,511,735						—
Non-cash income						(1,683)						(2,046)
Deferred taxes						(2,404)						(11,137)
Change in fair value of Earnout Shares liability and Warrant liability						(66,257)						(29,361)
Change in Tax Receivable Agreement liability						(21,317)						—
Share-based compensation expense						35,759						23,795
Changes in operating assets and liabilities:
Accounts receivable, net						—						58
Interest receivable						3,336						113
Prepaid expenses and other current assets						(953)						(721)
Other long-term assets						(42)						(583)
Accounts payable						(1,778)						3,024
Accrued liabilities						5,442						3,289
Due to related parties						1,685						262
Net cash used in operating activities						(92,980)						(18,680)
Cash flows from investing activities:
Purchases of available-for-sale securities						(156,416)						(131,564)
Maturities of available-for-sale securities						65,845						42,250
Maturities of short-term investments						100,000						—
Capitalized software						(1,035)						(592)
Purchase of property, plant and equipment						(15,129)						(39,561)
Net cash used in investing activities						(6,735)						(129,467)
Cash flows from financing activities:
Issuance of Class A Common Stock, including exercise of Warrants						157						8
Payment of income taxes on vested share-based payment awards						(172)						(99)
Payments on finance lease obligations						(149)						—
Net cash used in financing activities						(164)						(91)
Net decrease in cash, cash equivalents, and restricted cash						(99,879)						(148,238)
Cash, cash equivalents, and restricted cash, beginning of period						331,676						536,927
Cash, cash equivalents, and restricted cash, end of period						$	231,797					$	388,689

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

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NET Power Inc.

Condensed Consolidated Statements of Cash Flows (Unaudited) (Continued)

In thousands

						Nine Months Ended September 30,
						2025						2024
Supplemental non-cash investing and financing activities:
Change in accruals for capital expenditures						$	(1,609)					$	3,826
Tax-related partnership distribution						—						4,130
Operating lease right-of use asset acquired						1,591						897
Finance lease right-of-use asset acquired						—						349
Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheet:
Cash and cash equivalents						$	229,315					$	386,257
Restricted cash						2,482						2,432
Total cash, cash equivalents, and restricted cash						$	231,797					$	388,689

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

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NET Power Inc.

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 1 — Nature of Business and Basis of Presentation

Nature of Business

NET Power Inc. (“Net Power” or the “Company”) is an energy technology company focused on delivering low-carbon gas power solutions. Historically, the Company’s sole business has been the development of a novel oxy-combustion power generation system (which we refer to as the “Net Power Cycle”) designed to produce reliable and affordable electricity from natural gas while capturing virtually all atmospheric emissions. The Net Power Cycle is designed to inherently capture CO2 while producing virtually no air pollutants such as SOX, NOX, and other particulates. Recently, the Company broadened the scope of its business to potentially include the development of low-carbon gas power solutions using more standard natural gas turbines paired with post-combustion carbon capture technology.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements included in this Quarterly Report on Form 10-Q have been prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) for interim financial information; however, certain information or footnote disclosures normally included in complete financial statements prepared in accordance with US GAAP may have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). In management’s opinion, these unaudited condensed consolidated financial statements have been prepared on the same basis as the annual financial statements for the year ended December 31, 2024 and include all adjustments, which consist of only normal and recurring adjustments, necessary for fair statement. Certain prior period financial information has been reclassified to conform to current period presentation.

The results reported in these unaudited condensed consolidated financial statements are not necessarily indicative of the results to be expected for the entire year. These unaudited condensed consolidated financial statements should be read in conjunction with the annual financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024, filed with the SEC on March 10, 2025 (the “2024 Annual Report”).

NOTE 2 — Significant Accounting Policies

The Company’s significant accounting policies used to prepare these condensed consolidated financial statements, unless otherwise noted below, are consistent with those used for the fiscal year ended December 31, 2024. Accordingly, refer to Note 2 to the consolidated financial statements in the 2024 Annual Report for the Company’s significant accounting policies.

Use of Estimates

The preparation of financial statements in conformity with US GAAP requires management to make certain estimates, judgments and assumptions. The estimates, judgments and assumptions made by the Company when accounting for items and matters such as, but not limited to, depreciation, amortization, asset valuations, goodwill and long-lived asset impairment, and share-based compensation were reasonably based on information available at the time they were made. These estimates, judgments, and assumptions can affect the reported amounts of assets and liabilities as of the date of the condensed consolidated financial statements, as well as amounts reported on the condensed consolidated statements of operations and comprehensive loss during the periods presented. To the extent there are differences between these estimates and actual results, the Company’s condensed consolidated financial statements may be materially affected.

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Segment Reporting

In accordance with ASC Topic 280, Segment Reporting (“ASC 280”), the Company has determined that it has one operating segment and one reportable segment, which includes all of the Company’s consolidated accounts. The Company’s chief operating decision maker (“CODM”) is its Chief Executive Officer. The CODM focuses on consolidated operating income (loss), with a focus on research and development and general and administrative expenses, along with interest income to assess the Company’s performance and allocate resources. Segment expenses and other segment items are provided to the CODM on the same basis as disclosed in the condensed consolidated financial statements. The measure of segment assets is reported on the Company’s condensed consolidated balance sheet as total assets.

Accounting Standards Not Yet Adopted

In December 2023, the Financial Accounting Standards Board (“FASB”) issued ASU 2023-09, Income Taxes (Topic 740)—Improvements to Income Tax Disclosures (“ASU 2023-09”). ASU 2023-09 requires companies to provide annually a tabular reconciliation of the reported income tax expense (or benefit) from continuing operations to the product of the income (or loss) from continuing operations before income taxes and the applicable statutory federal income tax rate using specified categories and to disclose separately reconciling items within certain categories with absolute values equal to or greater than five percent of the product of the income (or loss) from continuing operations before tax and the applicable statutory tax rate. Additionally, ASU 2023-09 requires a public business entity to disclose the year-to-date amount of income taxes paid, net of refunds received, to federal, state, and foreign jurisdictions. If a payment to a single federal, state or foreign jurisdiction equals or exceeds five percent of total income taxes paid, ASU 2023-09 requires separate disclosure of that payment. Finally, ASU 2023-09 requires a public business entity to disclose income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign jurisdictions and to disclose income tax expense (or benefit) from continuing operations disaggregated between federal, state, and foreign jurisdictions. ASU 2023-09 removes the requirement to disclose the nature and estimate of the range of reasonably possible increases or decreases in the unrecognized tax benefits balance in the next 12 months, or to make a statement that an estimate of the range cannot be made. ASU 2023-09 is effective for the Company for calendar years beginning after December 15, 2025. Early adoption is permitted. The Company is evaluating the impact of adoption to its income tax disclosures.

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses (“ASU 2024-03”), which requires new tabular disclosures in the notes to consolidated financial statements, disaggregating certain cost and expense categories within relevant captions on the consolidated statements of operations. The prescribed cost and expense categories requiring disaggregated disclosures include purchases of inventory, employee compensation, depreciation, and intangible asset amortization, along with certain other expense disclosures already required by U.S. GAAP that would need to be integrated within the new tabular disaggregated expense disclosures. Additionally, the amendments also require the disclosure of total selling expenses and an entity's definition of those expenses. The amendments in ASU 2024-03 are effective for annual periods beginning after December 15, 2026 and for subsequent interim periods. Early adoption is permitted and the amendments should be applied on a prospective basis, although retrospective application is permitted. The Company is evaluating the impact of adoption to its expense disclosures.

NOTE 3 — Impairment and other charges

Long-lived asset impairment

In March 2025, due to higher-than expected indicative cost estimates for its first utility-scale project, the Company identified a triggering event for evaluation of impairment of its long-term assets. As the Company is in the development stage, focusing on developing and commercializing its technology, the Company assessed its definite-lived intangible assets, the Demonstration Plant, and other corporate assets for impairment as an asset group (the “Developed Technology Asset Group”). In March 2025, management performed a probability-weighted undiscounted cash flow analysis, incorporating estimated cash flows from the deployment of its

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technology and the value of the underlying intellectual property, and the results indicated that no impairment was required. Additionally, in response to these higher-than expected indicative cost estimates, the Company initiated a value engineering process to assess Project Permian’s economic feasibility and to optimize its design to reduce costs. The Company temporarily paused further long lead equipment releases and engaged a management consulting firm to conduct a techno-economic analysis of clean, firm power alternatives and to assess the market potential of the Net Power Cycle product.

In the second quarter of 2025, the Company progressed its value engineering process to improve and validate commercialization pathways for the Net Power Cycle and introduced its integrated product offering, combining the Net Power Cycle with gas turbines with the goal of improving the cost-competitiveness of the Company’s technology and time to market for potential customers. Additionally, in July 2025, the One Big Beautiful Bill Act (“OBBBA”) was enacted, which enhanced the Section 45Q Tax Credit for Carbon Sequestration for enhanced oil recovery. The Company received initial results of the techno-economic analysis for the Net Power Cycle product, and the Company responded to a prospective customer’s Request for Proposal for Environmental Attribute Credits generated from carbon capture and sequestration at North American power plants. Based on these developments, the Company did not identify a triggering event that the Developed Technology Asset Group may be impaired as of June 30, 2025.

In late August 2025, the Company completed its assessment of the techno-economic analysis which identified slower than anticipated acceptance and deployment of the Company’s technology from previous expectations; the value engineering process identified significant cost reductions, but not to a level that is currently economic in the marketplace; and the engagement with potential customers identified time to market and cost as a significant factor to deployment of power solutions, both of which currently represent challenges for the Company’s Net Power Cycle product. The Company determined these factors would result in fewer deployments of the Company’s Net Power Cycle product than previously estimated and therefore, updated its long-range forecasts.

The Company determined that a triggering event had occurred requiring an impairment assessment of its Developed Technology Asset Group as a result of the feedback from potential customers to the Company’s technology and integrated product offering, the estimated cost reductions achieved through the value engineering process, and the resulting revisions to the Company’s forecasted future unit deployments and related cash flows based upon the perceived marketability and commercial viability of the Company’s technology. As a result, management updated its probability-weighted undiscounted cash flow analysis and determined that the carrying value of the Developed Technology Asset Group was not recoverable.

The fair value of the Developed Technology Asset Group was determined using the income and market approaches. The income approach used a probability-weighted discounted cash flow method based upon management’s projections of future revenues and operating expenses from future deployments of the Company’s technology discounted based an estimate of the Company’s cost of equity, which uses Level 3 inputs. As the Company has not generated revenue from its first-of-a-kind technology, the market approach was determined through an implied value approach by applying a control premium to the Company’s market capitalization, less working capital, investments in securities, and other assets not part of the asset group to estimate the fair value of the Developed Technology Asset Group, which uses Level 3 inputs. The application of these valuation methodologies resulted in an indicated fair value of the Developed Technology Asset Group of $200.0 million, resulting in the recognition of an impairment loss of $1,095.8 million for the three months ended September 30, 2025. The impairment was allocated to the long-lived assets within the asset group on a pro-rata basis, according to their relative carrying amounts. The impairment loss is included in Impairment and other charges on the condensed consolidated statements of operations and comprehensive loss.

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The following table details the recognition of long-lived asset impairment as of the measurement date:

$ in thousands						Carrying Amount						Impairment						New Carrying Amount
Intangible assets, net						$	1,197,106					$	(1,012,344)					$	184,762
Property, plant, and equipment, net						94,838						(80,201)						14,637
Operating lease right-of-use assets						3,895						(3,294)						601
Total						$	1,295,839					$	(1,095,839)					$	200,000

The Company considered whether the estimated useful lives of the individual long-lived assets in the Developed Technology Asset Group required revision and concluded no changes were necessary.

Goodwill impairment

In March 2025, the Company assessed its goodwill for impairment. Due to a change in the Company’s business plan, as discussed above, and related sustained decrease in the Company’s market capitalization, the Company concluded that it was more likely than not that the fair value of its goodwill was less than its carrying amount as of March 31, 2025. As a result, the Company fully impaired its goodwill and recognized an impairment of $359.8 million during the first quarter of 2025, which is included in Impairment and other charges on the condensed consolidated statements of operations and comprehensive loss.

Other charges

During the first quarter of 2025, as a result of the management’s assessment of the probability of the construction of Project Permian due to the factors discussed above, $56.1 million of costs previously included in Construction-in-progress were expensed. This amount is included in Impairment and other charges in the condensed consolidated statements of operations and comprehensive loss.

NOTE 4 — Investments

The Company is currently invested in available-for-sale securities. The $100 million certificate of deposit previously held by the Company matured and the interest receivable on the certificate of deposit was collected in June 2025.

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The following tables present the Company’s available-for-sale investments included in the condensed consolidated balance sheets:

$ in thousands						September 30, 2025
Current assets						Amortized Cost						Unrealized Gain																		Fair Value
Corporate bonds						$	32,370					$	45																	$	32,415
Commercial paper						23,423						—																		23,423
U.S. treasuries						80,118						122																		80,240
Total						$	135,911					$	167																	$	136,078
Long-term assets						Amortized Cost						Unrealized Gain																		Fair Value
Corporate bonds						$	31,267					$	122																	$	31,389
U.S. treasuries						24,636						119																		24,755
Total						$	55,903					$	241																	$	56,144

$ in thousands						December 31, 2024
Current assets						Amortized Cost						Unrealized Gain						Fair Value
Corporate bonds						$	11,006					$	15					$	11,021
Commercial paper						8,629						—						8,629
U.S. treasuries						58,637						57						58,694
Total						$	78,272					$	72					$	78,344
Long-term assets						Amortized Cost						Unrealized Gain						Fair Value
U.S. treasuries						$	22,538					$	90					$	22,628
Total						$	22,538					$	90					$	22,628

The cost of securities sold, if any, is based on the specific-identification method. During the three and nine months ended September 30, 2025 and 2024, there were no securities sold. There were no credit losses recognized during the three and nine months ended September 30, 2025 and 2024. The Company established no allowances for credit losses as of September 30, 2025 and December 31, 2024. The Company’s long-term available-for-sale investments mature through June 2027.

NOTE 5 — Fair Value Measurements

The following table presents the assets and liabilities that the Company measures at fair value on a recurring basis included in the condensed consolidated balance sheets and indicates the level of the valuation inputs the Company utilized to determine the fair value:

												September 30,						December 31,
$ in thousands						Level						2025						2024
Assets
Available-for-sale investments						1						$	192,222					$	100,972
Short-term investments						2						—						100,000
Total assets												$	192,222					$	200,972
Liabilities
Public Warrants						1						$	6,465					$	31,034
Private Placement Warrants						3						10,464						50,249
Earnout Shares						3						55						1,958
Total liabilities												$	16,984					$	83,241

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The following table contains a reconciliation of the beginning and ending balances of recurring Level 3 fair value measurements included in the condensed consolidated statements of operations and comprehensive loss:

						Three Months Ended September 30,												Nine Months Ended September 30,
$ in thousands						2025						2024						2025						2024
Balance of recurring Level 3 liabilities at beginning of period						$	4,817					$	36,175					$	52,207					$	38,622
Change in Earnout Shares liability						34						(944)						(1,903)						(1,211)
Change in Private Placement Warrant liability						5,668						(17,004)						(39,785)						(19,184)
Balance of recurring Level 3 liabilities at end of period						$	10,519					$	18,227					$	10,519					$	18,227

Short-term Investments

Short-term investments are valued at cost, which approximates fair value. The fair value of the short-term investments is considered a Level 2 fair value measurement because cost basis is observable, but not in an active market.

Available-for-sale Securities

The fair value of the available-for-sale investments is classified as a Level 1 fair value measurement because the investments are valued using the most recent quoted prices for identical assets in active markets.

Warrants

The Public Warrants are exercisable for 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 June 8, 2028. 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 fair value of the Public Warrants is considered a Level 1 fair value measurement.

The Private Placement Warrants 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 June 8, 2028. 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 uses a Black-Scholes Merton Model to value the Private Placement Warrants. Key inputs into the Black-Scholes Merton Model include the last Class A Common Stock closing price of $3.01 as of September 30, 2025 with a strike price of $11.50 per share. The volatility assumption is based on a blended average of equity volatility of publicly traded companies within the Company’s peer group, the Company's own historical volatility, and the implied volatility of the Public Warrants. The fair value of the Private Placement Warrants is considered a Level 3 fair value measurement.

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The following table contains the key inputs used in the valuations of the Private Placement Warrants:

						September 30, 2025						December 31, 2024
Term (in years)						2.69						3.44
Volatility						99.0		%				59.3		%
Risk-free rate						3.5		%				4.2		%

Earnout Shares

The fair value of the Earnout Shares (as defined in Note 6 to the consolidated financial statements included in the 2024 Annual Report) is 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. Historically, the volatility assumption is based on a blended average of equity volatility of publicly traded companies within the Company’s peer group, the historical volatility of the Company’s Class A common stock, and the implied volatility of the Public Warrants. For the valuation as of September 30, 2025, the volatility assumption is based on the Company’s own historical volatility, implied volatility on the Company’s own common stock options, and the implied volatility of the Public Warrants.

The following table contains the key inputs used in the valuations of the Earnout Shares:

									September 30, 2025															December 31, 2024
Term (in years)												0.69												1.43
Volatility												104.0		%										59.7		%
Risk-free rate												3.7		%										4.1		%

NOTE 6 — Goodwill and Intangible Assets

Goodwill

Goodwill represented 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 was allocated to the Company’s sole reportable segment and reporting unit.

The following table presents the changes to goodwill included in the condensed consolidated balance sheets:

						September 30,						December 31,
$ in thousands						2025						2024
Balance at the beginning of the period						$	359,847					$	423,920
Impairment						(359,847)						—
Measurement adjustments						—						(64,073)
Balance at the end of the period						$	—					$	359,847

During the second quarter of 2024, the Company completed its estimate of deferred taxes as of the Closing Date and finalized its purchase price allocation, which resulted in a measurement adjustment that reduced goodwill by $64.1 million.

Refer to Note 3 — Impairment and other charges for discussion of impairment.

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Definite-Lived Intangible Assets

The following tables summarize the Company’s definite-lived intangible assets included in the condensed consolidated balance sheets:

						September 30,																		December 31,
						2025																		2024
$ in thousands						Gross Amount						Accumulated Amortization												Net Amount						Gross Amount						Accumulated Amortization						Net Amount
Developed technology						$	184,465					$	(854)											$	183,611					$	1,345,000					$	(104,985)					$	1,240,015
Software(1)						448						(8)												440						1,407						(79)						1,328
Total definite-lived intangible assets						$	184,913					$	(862)											$	184,051					$	1,346,407					$	(105,064)					$	1,241,343

___________

(1) Software includes $0.1 million and $0.6 million related to software work-in-progress as of September 30, 2025 and December 31, 2024.

Refer to Note 3 — Impairment and other charges for discussion of impairments.

The following table presents the Company’s amortization expense for the following periods:

						Three Months Ended September 30,												Nine Months Ended September 30,
$ in thousands						2025						2024						2025						2024
Amortization expense						$	12,122					$	16,837					$	45,943					$	50,477

The Company does not own or control any intangible assets with indefinite useful lives. The following table presents estimated amortization expense for the next five years and thereafter (in thousands):

Remaining 2025						$	2,644
2026						10,489
2027						10,489
2028						10,518
2029						10,447
2030 and thereafter						139,464
Total						$	184,051

The Company regularly evaluates whether events or changes in circumstances warrant a revision to the remaining estimated useful lives of its long-lived assets.

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NOTE 7 — Property, Plant, and Equipment

The following table summarizes the key classifications of property, plant, and equipment included in the condensed consolidated balance sheets:

						September 30,						December 31,
$ in thousands						2025						2024
Demonstration Plant						$	13,739					$	122,845
Furniture and equipment						133						1,069
Assets acquired under finance lease						45						349
Construction-in-progress						2,672						48,438
Total property, plant, and equipment, gross						16,589						172,701
Accumulated depreciation and amortization (1)						(244)						(21,231)
Total property, plant, and equipment, net						$	16,345					$	151,470

___________

(1) As of September 30, 2025 and December 31, 2024, $1 thousand and $18 thousand, respectively, of accumulated depreciation and amortization is related to amortization of the finance lease right-of-use assets.

Refer to Note 3 — Impairment and other charges for discussion of impairments.

The following table presents the Company’s depreciation and amortization expense for the following periods:

						Three Months Ended September 30,												Nine Months Ended September 30,
$ in thousands						2025						2024						2025						2024
Depreciation and amortization expense						$	3,374					$	3,328					$	12,747					$	9,681

The Company regularly evaluates whether events or changes in circumstances warrant a revision to the remaining estimated useful lives of its long-lived assets.

NOTE 8 — Accrued Liabilities

Accrued liabilities in the condensed consolidated balance sheets consist of the following:

						September 30,						December 31,
$ in thousands						2025						2024
Incentive compensation						$	2,482					$	2,916
Capital expenditures						676						2,285
Accrued project expenses						3,181						—
Professional fees						2,632						1,143
Other accrued liabilities						2,489						1,063
Total accrued liabilities						$	11,460					$	7,407

NOTE 9 — Leases

On March 7, 2025, the Company entered into a building lease agreement for a warehouse in La Porte, Texas that commenced in April 2025. The lease has an initial term of 62 months and contains a renewal option of five years. The future minimum lease payments associated with this lease are approximately $2.0 million.

Refer to Note 3 — Impairment and other charges for discussion of impairment.

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NOTE 10 — Redeemable Non-Controlling Interests in Subsidiary

The following table presents the Company and the non-controlling interest (“NCI”) ownership percentage of the membership interests in OpCo as of the following periods:

									September 30,						December 31,
									2025						2024
Non-controlling interest holders									64.7		%				64.4		%
NET Power Inc.									35.3		%				35.6		%

The Company measures redeemable NCI each quarter at the higher of its book value or its redemption value. As of September 30, 2025 and December 31, 2024, the Company measured redeemable NCI at redemption value. The adjustment to record redeemable NCI at book or redemption value is recorded through Additional paid-in capital on the condensed consolidated statement of mezzanine shareholders' equity and shareholders' equity.

OpCo’s net loss before income tax was attributed to redeemable NCI holders at 64.5% for the three and nine months ended September 30, 2025. OpCo’s net loss before income tax was attributed to redeemable NCI holders at 66.0% for the three and nine months ended September 30, 2024.

NOTE 11 — Share-Based Compensation

The following table presents the aggregate share-based compensation expense, net of forfeitures, for the following periods:

						Three Months Ended September 30,												Nine Months Ended September 30,
$ in thousands						2025						2024						2025						2024
Share-based compensation expense						$	11,656					$	8,995					$	35,759					$	23,795

Performance Stock Units

As of September 30, 2025, there was $0.9 million of unrecognized share-based compensation expense related to unvested performance stock units (“PSUs”).

During 2025, there have been 524,000 PSUs awarded to certain executives for which the vesting occurs upon the achievement of specific market-based conditions related to the Company’s financial performance over a three-year period, modified based on the Company’s Relative Total Shareholder Return (“TSR”) and subject to final vesting based on the participant’s continued employment through the end of the requisite service period. The amount of awards that will ultimately vest for the PSU can range from 0% to 200% based on the TSR calculated over a three-year period. The fair value of the PSUs was determined using the Monte Carlo Simulation model and is being expensed over the three-year vesting period. The assumptions used to calculate the fair value of these awards were:

Weighted average expected life						3 years
Risk-free interest rates						3.9		%
Expected volatility						80.0		%

The following table presents a summary of PSU activity as of September 30, 2025 and the changes during the

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nine months ended September 30, 2025:

In thousands, except per share data						Quantity						Weighted-Average Grant Date Fair Value Per Share
Unvested, beginning of period						128						$	16.24
Granted						524						2.89
Forfeited						(330)						5.03
Unvested, end of period						322						$	6.00

Stock Options

As of September 30, 2025, there was $3.3 million of unrecognized share-based compensation expense related to stock options.

The stock options granted to employees during 2025 vest on the one-year anniversary of the date of grant. The Company will recognize compensation expense from the grant date through the expected vesting date. The fair value of the Company’s stock option grants was estimated utilizing the following range of assumptions using the Black-Scholes Merton model:

Weighted average expected life						3 years
Risk-free interest rates						3.58% - 3.87%
Expected volatility						86.0% - 89.6%

The following table presents a summary of stock option activity during the nine months ended September 30, 2025:

In thousands, except per share data						Quantity						Weighted-Average Exercise Price Per Share
Unvested, beginning of period						2,460												$	11.30
Granted						4,163												2.14
Forfeited						(141)												2.13
Unvested, end of period						6,482												$	5.62

Restricted Stock Units

As of September 30, 2025, there was $6.1 million of unrecognized share-based compensation expense related to unvested restricted stock units (“RSUs”), which the Company expects to recognize over a weighted average period of three years.

Generally, RSUs granted to employees and the majority of executives either cliff-vest on the three-year anniversary of the date of grant or vest ratably on each anniversary of the date of grant over a three-year period. Annual awards granted to independent directors cliff-vest on the first anniversary of each award’s grant date.

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The following table presents a summary of RSU activity during the nine months ended September 30, 2025:

In thousands, except per share data						Quantity						Weighted-Average Grant Date Fair Value Per Share
Unvested, beginning of period						2,132						$	11.54
Granted						2,114						2.58
Vested						(383)						8.04
Forfeited						(387)						3.51
Unvested, end of period						3,476						$	7.35

Refer to Note 14 — Related Party Transactions for information related to the BHES JDA.

NOTE 12 — Earnings (loss) per Share

Basic earnings (loss) per share attributable to shareholders is calculated by dividing net income (loss) attributable to shareholders by the weighted-average number of shares outstanding during the period. Diluted earnings (loss) per share attributable to shareholders includes the effect of potentially dilutive common shares outstanding.

The following table sets forth the computation of the Company’s basic and diluted earnings (loss) per share for the following periods:

						Three Months Ended September 30,												Nine Months Ended September 30,
In thousands, except per share data						2025						2024						2025						2024
Numerator
Net loss after income tax						$	(1,159,806)					$	(6,814)					$	(1,615,439)					$	(65,662)
Net income (loss) attributable to NET Power Inc.						$	(411,498)					$	818					$	(558,990)					$	(14,871)
Denominator
Weighted-average number shares outstanding, basic and diluted						77,883						73,537						77,530						72,541
Earnings (loss) per share attributable to shareholders, basic and diluted						$	(5.28)					$	0.01					$	(7.21)					$	(0.21)

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 three and nine months ended September 30, 2025 and 2024.

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Based on the amounts outstanding at September 30, 2025 and 2024, the Company excluded the following financial instruments from the computation of diluted earnings (loss) per share because their inclusion would be anti-dilutive:

In thousands																		September 30,
Anti-Dilutive Instruments																		2025						2024
Public Warrants																		8,621						8,622
Private Placement Warrants																		10,900						10,900
Earnout Shares																		329						329
BHES Bonus Shares																		2,068						2,068
Unvested Class A OpCo Units																		—						242
Vested Class A OpCo Units																		143,930						140,630
Unvested RSUs																		2,219						871
Unvested PSUs																		322						128
Make-Whole Awards																		1,257						1,179
Stock Options																		6,482						2,460
Total																		176,128						167,429

    

NOTE 13 — Income Taxes

As of September 30, 2025, the Company estimated its annual effective tax rate to be 1.89%, and recorded a deferred income tax benefit of $1.2 million and $2.4 million for the three and nine months ended September 30, 2025. The annual effective tax rate varies from the statutory federal income tax rate due to amounts allocated to NCI, changes in the Company’s valuation allowance and other permanent items.

On July 4, 2025, the OBBBA was enacted in the U.S. The OBBBA includes significant provisions, such as the permanent extension of certain expiring provisions of the Tax Cuts and Jobs Act, modifications to the international tax framework and the restoration of favorable tax treatment for certain business provisions. The legislation has multiple effective dates, with certain provisions effective in 2025 and others implemented through 2027. We have evaluated OBBBA and determined that there were no material impacts to our consolidated financial statements.

Tax Receivable Agreement

In March 2025, due to the Company’s decision to pause new purchase commitments for Project Permian’s long-lead equipment and commencement of a value engineering exercise to determine project cost reductions and better understand Project Permian’s expected economic feasibility, the Company determined it was not more likely than not that its deferred tax assets subject to the Tax Receivable Agreement (“TRA”) would be realized and therefore reduced the TRA liability to zero as payments under the TRA were not considered probable. Accordingly, in March 2025, the Company recognized a $21.3 million reduction in the Tax Receivable Agreement liability, which is recorded in Change in Tax Receivable Agreement liability in the condensed consolidated statements of operations for the nine months ended September 30, 2025.

On May 12, 2025, pursuant to its rights under the TRA, the Company delivered to the agent of the TRA holders notice of the Company’s intent to terminate the TRA (the “Early Termination Notice”). No early termination payment was payable to any TRA holder. The Early Termination Notice became final and binding on June 12, 2025.

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NOTE 14 — Related Party Transactions

The following table summarizes the related party transactions included in the condensed consolidated statements of operations and comprehensive loss:

						Three Months Ended September 30,												Nine Months Ended September 30,
$ in thousands						2025						2024						2025						2024
Master services agreement administrative costs						$	21					$	30					$	90					$	82
General and administrative						$	21					$	30					$	90					$	82
Master services agreement costs for Demonstration Plant						$	457					$	160					$	1,711					$	1,025
BHES JDA						17,307						12,865						55,312						33,030
Research and development						$	17,764					$	13,025					$	57,023					$	34,055
BHES Limited Notice to Proceed						—						—						19,533						—
Project development						$	—					$	—					$	19,533					$	—

The Company had $8.2 million and $6.5 million in current liabilities payable to related parties as of September 30, 2025 and December 31, 2024, respectively, on the condensed consolidated balance sheets related to the following services. These related party payables are unsecured and are due on demand.

Master Services Agreements

A significant shareholder provides the Company with patent administration services related to the development of the Net Power Cycle. These totals are included in General and administrative on the condensed 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. These totals are reflected in Research and development on the condensed consolidated statements of operations and comprehensive loss.

BHES JDA

On February 3, 2022, the Company entered into the Original JDA, which was subsequently amended and restated on June 30, 2022 and December 13, 2022 with BHES to invest in, develop, and deploy the Net Power Cycle in collaboration with the Company (as amended and restated, the “BHES JDA”). The BHES JDA is settled in cash and issuances of equity in exchange for services related to the development and commercialization of the technology. The Company records the expense for services provided by BHES within Research and development on the condensed consolidated statements of operations and comprehensive loss. As a result of the equity issuances under the BHES JDA, BHES’s ownership interest in the Company exceeds 5%; therefore, it is considered a related party for all periods presented.

The portion of BHES 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 condensed consolidated balance sheets and the condensed consolidated statement of mezzanine shareholders' equity and shareholders' equity. The following tables display the expense recognized in the consolidated statement of comprehensive income for

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shares distributed as payment for services rendered under the terms of the BHES JDA during the periods described below:

						Quantity												Expense Recognized
						Three Months Ended September 30,												Three Months Ended September 30,
in thousands						2025						2024						2025						2024
Class A OpCo Units						1,357						1,030						$	8,971					$	6,807
Class B Common Stock						1,357						1,030						—						—
Total																		$	8,971					$	6,807

																		Quantity												Expense Recognized
																		Nine Months Ended September 30,												Nine Months Ended September 30,
in thousands																														2025						2024						2025						2024
Class A OpCo Units																														4,166						2,623						$	27,541					$	17,336
Class B Common Stock																														4,166						2,623						—						—
Total																																										$	27,541					$	17,336

Shares issued as payment under the terms of the BHES JDA are issued at a discount expected to cause a total loss of approximately $17.5 million to the Company over the term of the agreement. The Company has incurred inception-to-date losses of $13.5 million related to such issuances. Additionally, if the volume-weighted average price of the Company’s stock for ten consecutive trading days (“10-Day VWAP”) immediately preceding the payment date for services under the BHES JDA is less than $4.00 per share (the “Floor Price”), an incremental cash payment is required for the difference between the 10-Day VWAP and the Floor Price (the “BHES JDA Make-Whole Payment”). As of September 30, 2025, the Company had $0.5 million in current liabilities payable to related parties on the condensed consolidated balance sheets related to the BHES JDA Make-Whole Payment. For the three and nine months ended September 30, 2025, the Company incurred $1.0 million and $4.9 million related to the BHES JDA Make-Whole Payment. For the three and nine months ended September 30, 2024, the Company had no such expenses related to the BHES JDA Make-Whole Payment.

BHES may earn additional shares (“BHES Bonus Shares”) if it meets certain targets related to the development of the Company’s technology. The Company determined that it is probable it will issue these shares to BHES; therefore, the Company recognizes the compensation cost associated with these share-based payments ratably over the expected service period. The following table disaggregates the variable share-based compensation payable to BHES should it meet its milestone objectives:

$ in thousands												Compensation Cost Incurred To Date						Remaining Compensation Cost						Total Compensation Cost
BHES JDA												$	24,390					$	2,955					$	27,345

BHES Limited Notice to Proceed

Through September 30, 2025, the Company has incurred $41.5 million under a Letter of Limited Notice to Proceed for the Purchase of KPEP Long Lead Time Items with BHES, as amended, for the purchase of long-lead materials necessary for the procurement and manufacture of the turboexpander and related key process equipment and machinery for the Company’s first utility-scale power plant, along with related fees and services.

BHES Equipment Purchases

On August 14, 2025, the Company committed to purchase a lube oil system from BHES for the Demonstration Plant for $1.6 million. As of September 30, 2025, the Company incurred $0.2 million related to this commitment.

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NOTE 15 — Commitments and Contingencies

Litigation

From time to time, the Company is party to certain legal actions and claims. Other than any such ordinary routine litigation incidental to the business and except as described below, the Company is not currently a party to, nor is our property currently subject to, any material legal proceedings, and the Company is not aware of any such proceedings contemplated by governmental authorities.

On April 18, 2025, an alleged stockholder of the Company (the “Plaintiff”), individually and on behalf of all others similarly situated, filed a putative class action complaint for violation of federal securities laws against the Company, its Chief Executive Officer, President and Interim Chief Financial Officer, its former Chief Financial Officer and its former President and Chief Operating Officer (collectively, the “Defendants”) in the United States District Court for the Middle District of North Carolina (the “Complaint”). The Complaint purports to bring a federal securities class action on behalf of a class of persons and entities other than the Defendants who acquired the Company’s securities between June 9, 2023 and March 7, 2025 and asserts violations of Sections 10(b) and 20(a) of the Exchange Act and Rule 10b-5 promulgated thereunder. The Complaint alleges, among other things, that the Defendants made materially false and misleading statements related to the Company’s business, operations and prospects, including the timing and costs of developing Project Permian. The Plaintiff seeks, among other things, certification of a class, an award of unspecified compensatory damages, interest, costs and expenses, including attorneys’ fees and expert fees.

On May 29, 2025, an alleged stockholder of the Company, filed a derivative suit on behalf of the Company against the Company’s Chief Executive Officer, President and Interim Chief Financial Officer, its former Chief Financial Officer, its former President and Chief Operating Officer and its board of directors in the United States District Court for the Middle District of North Carolina, asserting claims for breach of fiduciary duty, unjust enrichment, abuse of control, gross mismanagement, waste of corporate assets, and violations of federal securities laws (the “Derivative Complaint”). These claims are predicated on the same allegedly false and misleading statements regarding the time and capital needed to complete Project Permian that are the subject of the Complaint outlined above.

The Company intends to vigorously defend against the claims brought in both matters. In light of the complexity and ongoing and uncertain nature of the outstanding proceedings and inquiries, at this time the Company is unable to estimate a reasonably possible financial loss or range of financial loss, if any, that the Company may incur to resolve or settle these matters.

Asset Retirement Obligation

Under the terms of the lease for the Demonstration Plant, the Company is required to remove the Demonstration Plant and restore the land to post-clearing grade level. During 2024, the Company revised the estimate of its asset retirement obligation as a result of additional construction at the Demonstration Plant. The following table reconciles the beginning and ending balances of the asset retirement obligation as of the dates presented:

						September 30,						December 31,
$ in thousands						2025						2024
Asset retirement obligation, beginning of period						$	3,265					$	2,060
Revision of estimate						—						996
Accretion expense						246						209
Asset retirement obligation, end of period						$	3,511					$	3,265

Unconditional Purchase Obligations

The Company has committed to purchase industrial components for installation at its Demonstration Plant and its first commercial power plant. The Company pays for these components in installments aligned to contractual

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milestones. In accordance with ASC Topic 440, Commitments, the Company does not recognize these commitments on the condensed consolidated balance sheets.

As of September 30, 2025, the Company had $32.1 million of remaining purchase obligations through February 2027 related to the BHES JDA, which is expected to be settled 50% in cash and 50% in common stock, plus any incremental cash payments that may be owed for periods where the 10-Day VWAP is less than $4.00 per share in the 10 trading days preceding the date on which shares are to be issued to BHES. In addition, the Company had $66.8 million of additional remaining asset purchase obligations through 2026. Refer to Note 14 — Related Party Transactions for additional information related to the BHES JDA.

NOTE 16 — Subsequent Events

Gas Turbine Purchase Obligation

On November 12, 2025, the Company entered into an agreement with a vendor for the purchase of two modular gas turbine generator sets for a total purchase obligation of $77.7 million, of which $1.0 million has been paid as of the date of the agreement. Remaining payments under the contract are due at certain milestones through 2028.

Letter of Intent with Entropy, Inc.

On November 7, 2025, the Company signed a letter of intent with Entropy, Inc., to negotiate one or more definitive agreements under which the Company would, among other things, exclusively license and commercialize the post-combustion carbon capture technology of Entropy, Inc. in the United States.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following management’s discussion and analysis (“MD&A”) provides information that management believes is relevant to an assessment and understanding of our condensed consolidated results of operations and financial condition and includes forward-looking statements that involve risks, uncertainties and assumptions, including those described in “Cautionary Note Regarding Forward-Looking Statements” included in the forepart of this Quarterly Report on Form 10-Q (our “Quarterly Report”) and included in Part I, Item 1A Risk Factors in our Annual Report on Form 10-K for the year ended December 31, 2024 (our “Annual Report”), as filed with the SEC on March 10, 2025.

The following MD&A should be read in conjunction with our condensed consolidated financial statements and related notes included in Part 1, Item 1 in this Quarterly Report and our audited consolidated financial statements and related notes included in our Annual Report.

Overview

Net Power is an energy technology company focused on delivering low-carbon gas power solutions. Historically, our sole business has been the development of a novel oxy-combustion power generation system (which we refer to as the “Net Power Cycle”) designed to produce reliable and affordable electricity from natural gas while capturing virtually all atmospheric emissions. The Net Power Cycle is designed to inherently capture CO2 while producing virtually no air pollutants such as SOX, NOX, and other particulates. Recently, we have broadened the scope of our business to potentially include the development of low-carbon gas power solutions using more standard natural gas turbines paired with post-combustion carbon capture technology.

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, potential supply chain issues, changes in tax policies and other incentives supporting carbon capture, our access to the capital needed to finance the development of our projects, and development of competing energy technologies sooner or at a lesser cost than our products. Supply chain issues related to the manufacturing and transportation of key equipment, including as a result of tariffs imposed by the U.S. or other countries or other trade barriers, measures, or conflicts, may lead to a delay in our commercialization efforts, which could impact our results of operations, financial condition and prospects. Also, currency fluctuations, inflation, and tariffs and other trade barriers, measures or conflicts may significantly increase freight charges, raw material costs and other expenses associated with our business, and such increased costs could materially and adversely affect our results of operations, financial condition and prospects.

Specifically, on July 4, 2025, President Trump signed into law the One Big Beautiful Bill Act (“OBBBA”), a large piece of tax and spending legislation that has specific material effects for Net Power’s intended SN1 project and future pipeline. The OBBBA preserved the core elements of the 45Q tax credit for carbon sequestration and use, including eligibility for programs to efficiently monetize the credits (i.e., direct pay and transferability). The OBBBA also created parity in 45Q credit value for carbon emissions used in enhanced oil recovery (“EOR”); eligible projects capturing carbon emissions for EOR that would have previously been eligible for a $60/ton credit will now be eligible for the full value of $85/ton. Net Power expects this increase in credit value to materially improve the economics for projects capturing emissions for EOR, strengthening economics for projects specifically in the Permian Basin. The OBBBA included additional other provisions with expected fewer material effects on Net Power projects and indirect effects on the broader market for clean power; the full implications of those changes are not yet clear.

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Additionally, the Trump Administration has started the process to change regulations on new natural gas-fired power plants. Currently, the U.S. Environmental Protection Agency’s regulations for new gas turbines that run above a 40% capacity factor require such facilities to meet a 90% capture rate by 2032. These regulations were proposed to be repealed on June 11, 2025. The implications of the potential repeal of these regulations are uncertain at this time, but we do not expect such repeal to have a material impact on the market for Net Power’s projects.

Commencing Commercial Operations

In 2024, Net Power began purchasing initial long-lead materials for its first utility-scale power plant (“SN1”) with the intention of locating SN1 in the Permian Basin of West Texas (“Project Permian”). However, after completing the front-end engineering and design (“FEED”) process in December 2024, the indicative cost estimate at that time was higher than originally anticipated. In response, during the first quarter of 2025, Net Power commenced a post-FEED optimization and value engineering process. In March 2025, the Company suspended further long-lead equipment releases but value engineering and certain development work continued into the third quarter of 2025.

During the third quarter of 2025, we completed a market analysis of our oxy-combustion technology, identifying slower than anticipated acceptance and deployment of the technology from previous expectations. The value engineering efforts on Project Permian identified significant cost reductions, but not to a level that is economically competitive in the current market. Although we believe that oxy-combustion technology remains a viable, long-term solution for the delivery of low-carbon intensity power, we also believe that the near-term prioritization of gas turbines with post-combustion carbon capture is the optimal approach to meeting current market demands.

In response to unprecedented demand growth for low-cost, firm power generation solutions with viable pathways to decarbonize, we have broadened the scope of our business to include the generation of power using natural gas turbines paired with post-combustion carbon capture technology. In order to preserve capital for this new business opportunity, we have determined to pause all development work and related expenditures for SN1. We intend to complete Phase I testing at our Demonstration Plant in La Porte, Texas, which we expect to conclude by the end of 2025, after which we will reassess future testing phases.

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.

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Results of Operations

Comparison of the Three Months Ended September 30, 2025 to the Three Months Ended September 30, 2024

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

						Three Months Ended September 30,												$ Change						% Change
$ in thousands						2025						2024
Revenue						$	—					$	12					$	(12)					(100)		%
Cost of revenue						—						1						(1)						(100)		%
Gross profit						—						11
Operating expenses
General and administrative						9,108						8,448						660						8		%
Sales and marketing						1,395						1,032						363						35		%
Research and development						24,543						17,333						7,210						42		%
Project development						10,032						233						9,799						4,206		%
Impairment and other charges						1,095,839						—						1,095,839						n/a
Depreciation, amortization, and accretion						15,580						20,210						(4,630)						(23)		%
Total operating expenses						1,156,497						47,256
Operating loss						(1,156,497)						(47,245)
Other income (expense)
Interest income						4,835						7,992						(3,157)						(40)		%
Change in Earnout Shares liability and Warrant liability						(9,323)						27,690						(37,013)						(134)		%
Other income						2						3						(1)						(33)		%
Net other income (expense)						(4,486)						35,685
Net loss before income tax						(1,160,983)						(11,560)
Income tax benefit						1,177						4,746						(3,569)						(75)		%
Net loss after income tax						(1,159,806)						(6,814)
Net loss attributable to non-controlling interests						(748,308)						(7,632)
Net income (loss) attributable to NET Power Inc.						$	(411,498)					$	818

General and administrative

General and administrative expenses consist primarily of personnel-related expenses associated with our general and administrative organization and professional fees for legal, accounting, information technology, and other consulting services. General and administrative expenses increased by $0.7 million, or 8%, for the three months ended September 30, 2025, as compared to the same period in 2024. This increase was primarily due to greater professional fees for engineering and tax consulting and legal fees. Additionally, we incurred higher compensation expense due to stock-based compensation awards granted during 2025 and growth in employee headcount for the three months ended September 30, 2025, as compared to the same period in 2024.

Sales and marketing

Sales and marketing expenses consist primarily of personnel-related and consultant costs directly associated with our sales and marketing activities, which include general publicity efforts for the Company. Sales and marketing expenses increased by $0.4 million, or 35%, for the three months ended September 30, 2025, as

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compared to the same period in 2024. This increase was due to higher professional fees and growth in employee headcount.

Research and development

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 and development activities under the BHES JDA. R&D expenses increased by $7.2 million, or 42%, for the three months ended September 30, 2025, as compared to the same period in 2024. This increase was primarily due to more activity under the BHES JDA and ongoing validation testing campaigns at the Demonstration Plant that began in the fourth quarter of 2024. The Company also expanded its engineering headcount to support technology development efforts. Additionally, the Company incurred $1.0 million related to the JDA Make-Whole Payments for the three months ended September 30, 2025; no such expense was incurred for the same period in 2024.

Project development

Project development expenses consist of labor expenses and fees paid to third parties developing commercial scale projects. Project development expenses increased by $9.8 million, or 4,206%, for the three months ended September 30, 2025, as compared to the same period in 2024. Beginning in March 2025, the Company began expensing costs associated with Project Permian as the Company suspended further long lead equipment releases for the project while it performed a value engineering process to evaluate the feasibility of the project. These costs were capitalized during the three months ended September 30, 2024. For the three months ended September 30, 2025, the Company incurred $9.9 million of costs related to Project Permian.

Impairment and other charges

During the three months ended September 30, 2025, the Company recognized an impairment loss of $1,095.8 million related to its long-lived assets as a result of the responsiveness from potential customers to the Company’s technology and integrated product offering, the estimated cost reductions achieved in Project Permian, and the resulting revisions to the Company’s forecasted future unit deployments and related cash flows based upon the perceived marketability and commercial viability of the Company’s technology.

Depreciation, amortization, and accretion

Depreciation, amortization and accretion expenses consist primarily of depreciation on our Demonstration Plant and amortization of intangible assets. Depreciation, amortization and accretion expense decreased by $4.6 million, or 23%, for the three months ended September 30, 2025, as compared to the same period in 2024, primarily due to lower depreciation and amortization rates as a result of the long-lived assets impairment recognized during the three months ended September 30, 2025.

Interest income

Interest income decreased by $3.2 million, or 40%, for the three months ended September 30, 2025, as compared to the same period in 2024. Interest income decreased due to lower interest-bearing cash and investment balances, declines in interest rates, and lower investment accretion.

Change in Earnout Shares liability and Warrant liability

The change in Earnout Shares liability and Warrant liability decreased by $37.0 million, or 134%, for the three months ended September 30, 2025, as compared to the same period in 2024. The change was primarily due to the fluctuations in the market price of our Class A Common Stock as well as higher volatilities. The Company’s stock price increased $0.54 per share during the three months ended September 30, 2025 compared to a decrease of $2.82 per share for the three months ended September 30, 2024.

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Income tax benefit

Income tax benefit was $1.2 million for the three months ended September 30, 2025, compared to an income tax benefit of $4.7 million for the same period in 2024. This change was due to an increase in the Company’s valuation allowance, partially offset by a favorable permanent difference related to the change in the value of the Warrant liability as compared to the same period in 2024.

Net loss attributable to non-controlling interests

Net loss attributable to non-controlling interest was 64.5% of net loss before income tax for the three months ended September 30, 2025, as compared to 66.0% of net loss for the three months ended September 30, 2024. The change in the non-controlling interests was due to exchanges by OpCo members of Class A OpCo units for Class A PubCo shares, partially offset by the additional issuance of Class A OpCo units under the BHES JDA.

Results of Operations

Comparison of the Nine Months Ended September 30, 2025 to the Nine Months Ended September 30, 2024

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

						Nine Months Ended September 30,
$ in thousands						2025						2024						$ Change						% Change
Revenue						$	—					$	250					(250)						(100)		%
Cost of revenue						—						31						(31)						(100)		%
Gross profit						—						219
Operating expenses
General and administrative						31,378						22,643						8,735						39		%
Sales and marketing						4,074						2,660						1,414						53		%
Research and development						73,761						44,083						29,678						67		%
Project development						41,719						1,426						40,293						2,826		%
Impairment and other charges						1,511,735						—						1,511,735						n/a
Depreciation, amortization, and accretion						58,936						60,289						(1,353)						(2)		%
Total operating expenses						1,721,603						131,101
Operating loss						(1,721,603)						(130,882)
Other income
Interest income						16,179						24,712						(8,533)						(35)		%
Change in Earnout Shares liability and Warrant liability						66,257						29,361						36,896						126		%
Change in Tax Receivable Agreement liability						21,317						—						21,317						n/a
Other income						8						10						(2)						(20)		%
Net other income						103,761						54,083
Net loss before income tax						(1,617,842)						(76,799)
Income tax benefit						2,403						11,137						(8,734)						(78)		%
Net loss after income tax						(1,615,439)						(65,662)
Net loss attributable to non-controlling interests						(1,056,449)						(50,791)
Net loss attributable to Net Power Inc.						$	(558,990)					$	(14,871)

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General and administrative

General and administrative expenses increased by $8.7 million, or 39%, for the nine months ended September 30, 2025, as compared to amounts for the nine months ended September 30, 2024. During the second quarter of 2025, we terminated the employment of our former Chief Operating Officer, our former Chief Financial Officer, our former Chief Accounting Officer, and certain other employees. Such terminations resulted in $3.1 million in severance payments to these employees, as well as $1.1 million of stock-based compensation for related vesting accelerations. There also was an overall increase in compensation expense due to growth in employee headcount and stock-based compensation awards granted during 2025. Additionally, we incurred greater professional fees for engineering, tax, and legal services as well as higher information technology expenses related to the Company’s infrastructure buildout during the nine months ended September 30, 2025, as compared to the nine months ended September 30, 2024.

Sales and marketing

Sales and marketing expenses consist primarily of personnel-related costs and consultants costs directly associated with our sales and marketing activities, which include general publicity efforts for the Company. Sales and marketing expenses increased by $1.4 million, or 53%, for the nine months ended September 30, 2025, as compared to the nine months ended September 30, 2024. This increase was primarily attributable to higher employee headcount as well as severance costs and related accelerated stock-based compensation, partially offset by lower professional fees.

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 and development activities under the BHES JDA. R&D expenses increased by $29.7 million, or 67%, for the nine months ended September 30, 2025, as compared to amounts for the nine months ended September 30, 2024. This increase was primarily due to the timing of development activities under the BHES JDA and the validation testing campaigns at the Demonstration Plant that began in the fourth quarter of 2024. The Company also incurred higher engineering consulting fees and expanded its engineering headcount to support technology development efforts. Additionally, R&D expenses for the nine months ended September 30, 2025 included $4.9 million for the BHES JDA Make-Whole Payments; there was no such expense made during the same period in 2024.

Project development

Project development expenses consist of labor expenses and fees paid to third parties developing commercial scale projects. Project development expenses increased by $40.3 million, or 2,826%, for the nine months ended September 30, 2025, as compared the nine months ended September 30, 2024. Beginning in March 2025, the Company began expensing costs associated with Project Permian as the Company suspended further long lead equipment releases for the project while it performs a value engineering process to evaluate the feasibility of the project. These costs were capitalized during the nine months ended September 30, 2024. For the nine months ended September 30, 2025, the Company incurred $21.0 million of costs related to Project Permian and $19.5 million under a Letter of Limited Notice to Proceed for the Purchase of KPEP Long Lead Time Items with BHES, as amended related to certain milestones.

Impairment and other charges

During the first quarter of 2025, the Company assessed its goodwill for impairment due to a change in the Company’s business plan and related sustained decrease in the Company’s market capitalization. As a result, the Company fully impaired goodwill for an impairment loss of $359.8 million. Also in the first quarter of 2025, the Company expensed $56.1 million of costs associated with the construction of Project Permian as management initiated a value engineering process to assess the project’s feasibility and optimize its design and temporarily paused further long lead equipment releases. In the third quarter of 2025, the Company recognized an impairment loss of $1,095.8 million related to its long-lived assets as a result of the responsiveness from potential customers to the Company’s technology and integrated product offering, the estimated cost reductions

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achieved in Project Permian, and the resulting revisions to the Company’s forecasted future unit deployments and related cash flows based upon the perceived marketability and commercial viability of the Company’s technology.

Depreciation, amortization, and accretion

Our depreciation, amortization, and accretion expenses consist primarily of depreciation on our Demonstration Plant and amortization of intangible assets. Depreciation, amortization, and accretion expense decreased by $1.4 million, or 2%, for the nine months ended September 30, 2025, as compared to amounts for the same period in 2024, primarily due to lower depreciation and amortization rates as a result of the long-lived asset impairment during the three months ended September 30, 2025.

Interest income

Interest income decreased by $8.5 million, or 35%, for the nine months ended September 30, 2025, as compared to amounts for the same period in 2024. This decrease was due to lower interest-bearing cash and investment balances, declines in interest rates, and lower investment accretion.

Change in Earnout Shares liability and Warrant liability

The change in Earnout Shares liability and Warrant liability increased by $36.9 million, or 126%, for the nine months ended September 30, 2025, as compared to the same period in 2024. This increase is primarily due to the fluctuations in the market price of our Class A Common Stock as well as higher volatilities. The Company’s stock price decreased $7.58 per share during the nine months ended September 30, 2025 compared to a decrease of $3.09 per share for the nine months ended September 30, 2024.

Change in Tax Receivable Agreement liability

In March 2025, the Company reduced the Tax Receivable Agreement (“TRA”) liability of $21.3 million to zero as payments related to the TRA were not considered probable. In May 2025, pursuant to its rights under the TRA, the Company delivered to the agent of the TRA holders notice of the Company’s intent to terminate the TRA (the “Early Termination Notice”). No early termination payment was payable to any TRA holder. The Early Termination Notice became final and binding on June 12, 2025.

Income tax benefit

Our income tax benefit decreased by $8.7 million for the nine months ended September 30, 2025, as compared to amounts for the nine months ended September 30, 2024. This change was due to an increase in the Company’s valuation allowance, partially offset by a favorable permanent difference related to the change in the value of the Warrant liability as compared to the same period in 2024. In addition, the Company finalized deferred taxes as of the Closing Date of the Business Combination in 2024.

Net loss attributable to non-controlling interests

Net loss attributable to non-controlling interest was 64.5% of net loss before income tax for the nine months ended September 30, 2025, as compared to 66.0% of net loss for the nine months ended September 30, 2024. The change in the non-controlling interests was due to exchanges by OpCo members of Class A OpCo units for Class A PubCo shares, partially offset by the additional issuance of Class A OpCo units under the BHES JDA.

Liquidity and Capital Resources

Our principal sources of liquidity are cash, short-term investments and investments in highly liquid available-for-sale securities. Historically, our sources of liquidity have also included raising capital through the sale of equity. We may issue additional equity securities in the future. 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

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contractual obligations and other commitments. Our current liquidity needs primarily involve general and administrative costs and costs to develop our projects and procure the equipment necessary for such projects.

The following table summarizes our liquidity position:

						September 30,						December 31,
in thousands						2025						2024
Cash and cash equivalents						$	229,315					$	329,230
Short-term investments						—						100,000
Available-for-sale securities						192,222						100,972
Total liquidity						$	421,537					$	530,202

The available-for-sale securities are comprised of investment grade, fixed income securities. The short-term investments are comprised of a single 12-month certificate of deposit, held with a domestic banking institution, which matured in June 2025. Additionally, our current liabilities were $22.3 million at September 30, 2025.

We believe we have the ability to manage our operating costs such that our existing liquidity will be sufficient to fund our obligations for the next 12 months following the filing of this Report. We believe that our current sources of liquidity on hand should be sufficient to fund our general corporate operating expenses as we work to develop our products and projects, but certain costs are not reasonably estimable at this time and we may require additional funding. Specifically, we may require additional funding in order to successfully fund the projects we intend to develop.

Cash Flow Summary

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

						Nine Months Ended September 30,
in thousands						2025						2024
Net cash used in operating activities						$	(92,980)					$	(18,680)
Net cash used in investing activities						$	(6,735)					$	(129,467)
Net cash used in financing activities						$	(164)					$	(91)

Operating Activities

Cash used in operating activities increased $74.3 million for the nine months ended September 30, 2025, as compared to the same period in 2024. Our net cash used in operating activities to date have been primarily comprised of payroll, material and supplies, facilities expense, and professional services related to R&D, including the BHES JDA, and general and administrative activities. This change was primarily due to higher R&D costs, including costs incurred under the BHES JDA, as we commenced the validation testing campaigns at our Demonstration Plant during the fourth quarter of 2024, project development costs, and the expansion of the Company’s corporate infrastructure throughout 2024 and into 2025. We expect our cash used in operating activities to increase significantly before we start to generate any material cash inflows from our operations.

Investing Activities

During the nine months ended September 30, 2025, net cash used in investing activities decreased $122.7 million as compared to the same period in 2024. Cash used in investing activities for the nine months ended September 30, 2025 primarily reflects the maturity of the Company’s certificate of deposit and the reinvestment of those funds into available-for-sale securities, along with capital expenditures related to the Demonstration Plant and Project Permian during the period in which costs were capitalized. Cash used in investing activities for the nine months ended September 30, 2024 primarily reflects the initial investments in available-for-sale

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securities as well as capital expenditures related to Project Permian and the Demonstration Plant during that period.

Financing Activities

Our cash used in financing activities was generally consistent for the nine months ended September 30, 2024, as compared to the same period in 2024. Cash used in financing activities for the nine months ended September 30, 2025 consists of finance lease obligation payments, income tax payments on vested share-based compensation awards, and issuance of Class A Common Stock.

Commitments and Contractual Obligations

Asset Retirement Obligation

We hold a lease for approximately 218,900 square feet of land under the Demonstration Plant. In addition, we have an oxygen supply agreement with the lessor to supply oxygen to the Demonstration Plant. The lease expires on the earlier of (i) January 1, 2031 and (ii) the termination of our oxygen supply agreement with the lessor. The term of the oxygen supply agreement expires on January 1, 2030 with automatic 12-month renewal terms. The oxygen supply agreement may be terminated by us or by the lessor upon 24 months’ written notice prior to the expiration date of its current term. 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 $3.5 million and $3.3 million as of September 30, 2025 and December 31, 2024, respectively.

Leases

The Company leases corporate office space in Durham, North Carolina, and Houston, Texas. The Company also leases land in West Texas for Project Permian from a subsidiary of Occidental Petroleum. Additionally, the Company leases two office trailers at the Demonstration Plant, as well as a warehouse, in La Porte, Texas.

As of September 30, 2025, future minimum lease payments attributable to the Company’s operating and finance lease arrangements are approximately $4.7 million and $0.2 million, respectively.

Joint Development Agreement

As of September 30, 2025 and December 31, 2024, we have committed to funding a portion of the remaining development costs incurred under the BHES JDA through a combination of cash and equity. The BHES JDA’s total value is $140 million, which assumes a fixed price per share. As of September 30, 2025, we recognized approximately $54.0 million of inception-to-date cash expenses and approximately $54.0 million of inception-to-date share-based expenses related to the BHES JDA. In addition, the Company may be required to make additional cash payments to BHES during periods when the volume-weighted average price of our Class A Common Stock is less than $4.00 per share in the 10 trading days preceding applicable quarterly share issuances under the terms of the BHES JDA. As of September 30, 2025, the Company had $0.5 million in current liabilities payable to related parties on the condensed consolidated balance sheets related to the BHES JDA Make-Whole Payment. For the three and nine months ended September 30, 2025, the Company incurred expenses of $1.0 million and $4.9 million related to the BHES JDA Make-Whole Payments.

Off-Balance Sheet Arrangements

As of September 30, 2025 and December 31, 2024, we have not engaged in any off-balance sheet arrangements, as defined in the rules and regulations of the SEC.

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Purchase Commitments

As of September 30, 2025, we have committed to purchase certain components of industrial machinery for use at our Demonstration Plant and at SN1. The total gross commitments totaled $149.1 million. As of September 30, 2025, there was $66.8 million remaining related to these commitments.

Critical Accounting Policies and Estimates

Our financial statements have been prepared in accordance with accounting principles generally accepted in the U.S. Preparation of the financial statements requires our management to make a number of judgments, estimates and assumptions relating to the reported amounts 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 Note 2 — Significant Accounting Policies in our consolidated financial statements included in Part II, Item 8 in our Annual Report.

Impairment of Long-Lived Assets

We believe evaluating the recoverability of long-lived assets is a critical accounting estimate because it requires management to make judgments and assumptions regarding future trends and events. When events or changes in circumstances indicate that the carrying amount of long-lived assets may not be recoverable, the Company prepares projections of the undiscounted future cash flows expected to be generated from the underlying asset group. If the projections indicate that the underlying asset grouping is not expected to be recoverable, the estimated fair value of the asset group is determined. An impairment loss is recognized based on the difference between the carrying value of the asset group and its estimated fair value. The loss is allocated to the long-lived assets of the group on a pro-rata basis using the relative carrying amounts of those assets. For the three and nine months ended September 30, 2025, we recognized impairment loss of $1,095.8 million.

Emerging Growth Company Accounting Election

Section 102(b)(1) of the Jumpstart our Business Startups Act of 2012 (the “JOBS Act”) exempts emerging growth companies (“EGCs”) 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-EGCs, and any such election to not take advantage of the extended transition period is irrevocable. We expect to be an EGC at least through the end of 2025 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 who is also our 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, 2025. Based on this evaluation, our principal executive officer and our principal financial officer concluded that our disclosure controls and procedures were effective as of September 30, 2025.

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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

No changes in our internal control over financial reporting occurred during the fiscal quarter ended September 30, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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Part II - Other Information

Item 1. Legal Proceedings

From time to time, the Company is party to certain legal actions and claims. Other than any such ordinary routine litigation incidental to the business and except as described below, we are not currently a party to, nor is our property currently subject to, any material legal proceedings, and we are not aware of any such proceedings contemplated by governmental authorities.

On April 18, 2025, an alleged stockholder (the “Plaintiff”), individually and on behalf of all others similarly situated, filed a putative class action complaint for violation of federal securities laws against us, our Chief Executive Officer, President and Interim Chief Financial Officer, our former Chief Financial Officer and our former President and Chief Operating Officer (collectively, the “Defendants”) in the United States District Court for the Middle District of North Carolina (the “Complaint”). The Complaint purports to bring a federal securities class action on behalf of a class of persons and entities other than the Defendants who acquired our securities between June 9, 2023 and March 7, 2025 and asserts violations of Sections 10(b) and 20(a) of the Exchange Act and Rule 10b-5 promulgated thereunder. The Complaint alleges, among other things, that the Defendants made materially false and misleading statements related to our business, operations and prospects, including the timing and costs of developing Project Permian. The Plaintiff seeks, among other things, certification of a class, an award of unspecified compensatory damages, interest, costs and expenses, including attorneys’ fees and expert fees.

On May 29, 2025, an alleged stockholder of the Company filed a derivative suit on behalf of the Company against our Chief Executive Officer, President and Interim Chief Financial Officer, our former Chief Financial Officer, our former President and Chief Operating Officer and our board of directors in the United States District Court for the Middle District of North Carolina, asserting claims for breach of fiduciary duty, unjust enrichment, abuse of control, gross mismanagement, waste of corporate assets, and violations of federal securities laws (the “Derivative Complaint”). These claims are predicated on the same allegedly false and misleading statements regarding the time and capital needed to complete Project Permian that are the subject of the Complaint outlined above.

We intend to vigorously defend against the claims brought in both matters. In light of the complexity and ongoing and uncertain nature of the outstanding proceedings and inquiries, at this time we are unable to estimate a reasonably possible financial loss or range of financial loss, if any, that we may incur to resolve or settle these matters.

Item 1A. Risk Factors

In addition to the information set forth in this Form 10-Q, you should carefully consider the risk factors disclosed in our Annual Report. The information presented below updates, and should be read in conjunction with, the risk factors and information disclosed in our Annual Report. Except as set forth below, there have been no material changes to the risk factors disclosed in the Annual Report.

We have incurred and may in the future incur losses due to an impairment in the carrying value of our long-lived assets.

In September 2025, we determined that a triggering event had occurred requiring an impairment assessment of our Developed Technology Asset Group, which resulted in the recognition of an impairment loss of $1,095.8 million for the three and nine months ended September 30, 2025.

This impairment loss is a reflection of the current market for our technology that has resulted from information gathered by management regarding the projected cost of Project Permian and the ability of our technology to compete with other prevailing energy technologies on both a cost and efficiency basis. Any impairment determinations involve significant assumptions and judgments. If actual results are not consistent with our assumptions and estimates, or our assumptions and estimates change due to new information, we may be

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exposed to additional impairment charges in future periods, which could adversely affect the Company’s business and financial results.

The Company has recently decided to broaden the scope of its business, and it may not be able to successfully execute on its broadened business strategy in a cost-effective manner. If the Company fails to execute on its broadened business strategy, for whatever reason, it could materially and adversely affect its business and results of operations.

In response to recent adverse events that ultimately resulted in the Company recognizing an impairment loss, the Company has decided to broadened the scope of its business to also include the generation of power using more standard simple cycle and combined cycle natural gas turbines in combination with post-combustion carbon capture technology as a means of capturing the CO2 generated by those turbines. If we are unable to successfully execute on our broadened business strategy, which includes, among other things, developing additional technologies and generating customer interest in any resulting products, our business and results of operations could be adversely affected.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Unregistered Sales of Equity Securities

On August 5, 2025, the Company issued 1,561,723 shares of Class B Common Stock and OpCo issued 1,561,723 Class A units to BHES as payment for costs incurred pursuant to the Amended and Restated JDA during the second quarter of 2025. 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

Equipment Supply Agreement

On November 12, 2025, we, through our wholly-owned subsidiary, entered into an Equipment Supply Agreement with Relevant Power Solutions, LLC (“RPS”) to purchase two modular gas turbine generator sets with nominal gross power of approximately 30 megawatts each (“Gas Turbine Sets”) for use in our proposed project in the Permian Basin of West Texas. The purchase price for the Gas Turbine Sets is approximately $77.7 million, which amount is payable in multiple installments through June 2028. Pursuant to the Equipment Supply Agreement, RPS will design, engineer, fabricate, manufacture, and support the commissioning and performance testing of the Gas Turbine Sets at the project site.  The Equipment Supply Agreement contains customary terms, conditions, representations, and warranties.

Insider Trading Arrangements

During the three months ended September 30, 2025, none of our directors or “officers” (as such term is defined in Rule 16a-1(f) under the Exchange Act) adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement” (as each term is defined in Item 408(a) of Regulation S-K).

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Item 6. Exhibits

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).
31.1			Certification of Principal Executive Officer and 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 and 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.
0.104			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.

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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 13, 2025                        NET Power Inc.     

    

                                By:      /s/ Caleb C. Van Dolah        

                                Name:     Caleb C. Van Dolah

                                Title:    Controller

(Authorized Officer and Principal     

Accounting Officer)

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