NPWR

SEC source: 0001104659-24-097889 · tm2423525-1_4seq1.xml · nonDerivative · entry 4

8 Rivers Capital, LLC · CIK 0001981100 · 10% owner

SK INC. · CIK 0001947998 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 256,154

F4 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.86 to $8.05. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F6 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F7 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

SEC source: 0001104659-24-097891 · tm2423525-2_4seq1.xml · nonDerivative · entry 3

NPEH, LLC · CIK 0001981772 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 416,675

F3 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.97 to $8.20. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0001104659-24-097889 · tm2423525-1_4seq1.xml · nonDerivative · entry 3

8 Rivers Capital, LLC · CIK 0001981100 · 10% owner

SK INC. · CIK 0001947998 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 416,675

F3 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.97 to $8.20. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F6 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F7 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

SEC source: 0001104659-24-097891 · tm2423525-2_4seq1.xml · derivative · entry 6

NPEH, LLC · CIK 0001981772 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,505,300

Underlying: Class A Common Stock · 500,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 3, 2024, the Reporting Person exchanged 500,000 Class A Units of NET Power Operations LLC for 500,000 shares of the Issuer's Class A Common Stock.

F1 · derivative.exercise_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 3, 2024, the Reporting Person exchanged 500,000 Class A Units of NET Power Operations LLC for 500,000 shares of the Issuer's Class A Common Stock.

F1 · derivative.expiration_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 3, 2024, the Reporting Person exchanged 500,000 Class A Units of NET Power Operations LLC for 500,000 shares of the Issuer's Class A Common Stock.

SEC source: 0001104659-24-097891 · tm2423525-2_4seq1.xml · nonDerivative · entry 2

NPEH, LLC · CIK 0001981772 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,505,300

F2 · price: For each Class A Unit of Net Power Operations LLC, the Reporting Person owns a corresponding share of Class B Common Stock of the Issuer. Upon the exchange of 500,000 Class A Units of Net Power Operations LLC, an equal number of shares of Class B Common Stock of the Issuer held by the Reporting Person, which have no economic value, were cancelled.

SEC source: 0001104659-24-097891 · tm2423525-2_4seq1.xml · nonDerivative · entry 1

NPEH, LLC · CIK 0001981772 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 500,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 3, 2024, the Reporting Person exchanged 500,000 Class A Units of NET Power Operations LLC for 500,000 shares of the Issuer's Class A Common Stock.

SEC source: 0001104659-24-097889 · tm2423525-1_4seq1.xml · derivative · entry 6

8 Rivers Capital, LLC · CIK 0001981100 · 10% owner

SK INC. · CIK 0001947998 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 29,505,300

Underlying: Class A Common Stock · 500,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 3, 2024, NPEH, LLC ("NPEH") exchanged 500,000 Class A Units of NET Power Operations LLC for 500,000 shares of the Issuer's Class A Common Stock.

F1 · derivative.exercise_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 3, 2024, NPEH, LLC ("NPEH") exchanged 500,000 Class A Units of NET Power Operations LLC for 500,000 shares of the Issuer's Class A Common Stock.

F1 · derivative.expiration_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 3, 2024, NPEH, LLC ("NPEH") exchanged 500,000 Class A Units of NET Power Operations LLC for 500,000 shares of the Issuer's Class A Common Stock.

F6 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F7 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

SEC source: 0001104659-24-097889 · tm2423525-1_4seq1.xml · nonDerivative · entry 2

8 Rivers Capital, LLC · CIK 0001981100 · 10% owner

SK INC. · CIK 0001947998 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 29,505,300

F2 · price: For each Class A Unit of Net Power Operations LLC, NPEH owns a corresponding share of Class B Common Stock of the Issuer. Upon the exchange of 500,000 Class A Units of Net Power Operations LLC, an equal number of shares of Class B Common Stock of the Issuer held by NPEH, which have no economic value, were cancelled.

F6 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F7 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

SEC source: 0001104659-24-097889 · tm2423525-1_4seq1.xml · nonDerivative · entry 1

8 Rivers Capital, LLC · CIK 0001981100 · 10% owner

SK INC. · CIK 0001947998 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 500,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 3, 2024, NPEH, LLC ("NPEH") exchanged 500,000 Class A Units of NET Power Operations LLC for 500,000 shares of the Issuer's Class A Common Stock.

F6 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F7 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

SEC source: 0001845437-24-000034 · wk-form4_1720036816.xml · nonDerivative · entry 1

Kelliher Joseph T · CIK 0001464551 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,294

F1 · shares: The reporting person received shares of Class A common stock in lieu of cash as payment for his services as a director of NET Power Inc.

SEC source: 0001845437-24-000027 · wk-form4_1717704735.xml · nonDerivative · entry 1

Kelliher Joseph T · CIK 0001464551 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,813

F1 · shares: Restricted stock units that vest on June 4, 2025, subject to continued service as a director.

SEC source: 0001845437-24-000028 · wk-form4_1717704836.xml · nonDerivative · entry 1

Alexander Ralph · CIK 0001358507 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,813

F1 · shares: Restricted stock units that vest on June 4, 2025, subject to continued service as a director.

SEC source: 0001845437-24-000025 · wk-form4_1717704423.xml · nonDerivative · entry 1

Veltmann Alejandra · CIK 0001564633 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,813

F1 · shares: Restricted stock units that vest on June 4, 2025, subject to continued service as a director.

SEC source: 0001845437-24-000026 · wk-form4_1717704526.xml · nonDerivative · entry 1

PETERSON CAROL R. · CIK 0001973456 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,813

F1 · shares: Restricted stock units that vest on June 4, 2025, subject to continued service as a director.

SEC source: 0001104659-24-065503 · tm2415415-2_4seq1.xml · nonDerivative · entry 1

SK INC. · CIK 0001947998 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By: Tillandsia

Disclosed balance after: 2,500,000

F1 · shares: On May 23, 2024, Tillandsia, Inc ("Tillandsia") sold 2,500,000 shares of Class A Common Stock pursuant to a block trade through its placement manager, Citigroup Global Markets Limited, at a price of $10.04 per share.

F2 · shares: As holder of 100.0% of the outstanding equity in Tillandsia, SK Inc. ("SK") may be deemed to be a beneficial owner of the securities directly owned by Tillandsia. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F2 · balance_after: As holder of 100.0% of the outstanding equity in Tillandsia, SK Inc. ("SK") may be deemed to be a beneficial owner of the securities directly owned by Tillandsia. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F2 · ownership.nature: As holder of 100.0% of the outstanding equity in Tillandsia, SK Inc. ("SK") may be deemed to be a beneficial owner of the securities directly owned by Tillandsia. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

SEC source: 0001845437-24-000012 · wk-form4_1712261508.xml · derivative · entry 3

PATEL AKASH S. · CIK 0001979780 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,451

Underlying: Class A Common Stock · 33,451 shares

Expires not disclosed

F3 · derivative.exercise_price: The Reporting Person will receive a number of shares of Class A common stock equal to 50% of the number of PSUs upon attainment of a 10% compound annual growth rate ("CAGR") of the 30-day volume weighted average price ("VWAP") of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 100% of the number of PSUs upon attainment of a 12% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 200% of the number of PSUs upon attainment of a 15% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024.

F3 · derivative.exercise_date: The Reporting Person will receive a number of shares of Class A common stock equal to 50% of the number of PSUs upon attainment of a 10% compound annual growth rate ("CAGR") of the 30-day volume weighted average price ("VWAP") of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 100% of the number of PSUs upon attainment of a 12% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 200% of the number of PSUs upon attainment of a 15% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024.

F3 · derivative.expiration_date: The Reporting Person will receive a number of shares of Class A common stock equal to 50% of the number of PSUs upon attainment of a 10% compound annual growth rate ("CAGR") of the 30-day volume weighted average price ("VWAP") of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 100% of the number of PSUs upon attainment of a 12% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 200% of the number of PSUs upon attainment of a 15% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024.

SEC source: 0001845437-24-000012 · wk-form4_1712261508.xml · nonDerivative · entry 2

PATEL AKASH S. · CIK 0001979780 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 351,184

F2 · shares: Restricted stock units that vest upon the latest to occur of the following three events: (1) The date that is 12 months after the date on which natural gas is first ignited at NET Power's first utility-scale plant; (2) The date of execution by all parties to an agreement related to the first sale by NET Power and its subsidiaries of a license to construct, operate, and maintain a second power plant utilizing the "NET Power Cycle" (the "License Agreement"); and (3) The date of documentation of a final investment decision by the licensee under the above-referenced License Agreement to proceed with constructing the second power plant utilizing the "NET Power Cycle."

SEC source: 0001845437-24-000012 · wk-form4_1712261508.xml · nonDerivative · entry 1

PATEL AKASH S. · CIK 0001979780 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,451

F1 · shares: Restricted stock units that vest in three equal installments on each anniversary of April 2, 2024, subject to continued employment.

SEC source: 0001845437-24-000011 · wk-form4_1712261457.xml · derivative · entry 3

ALLEN BRIAN F. · CIK 0001975816 · COO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,610

Underlying: Class A Common Stock · 37,610 shares

Expires not disclosed

F3 · derivative.exercise_price: The Reporting Person will receive a number of shares of Class A common stock equal to 50% of the number of PSUs upon attainment of a 10% compound annual growth rate ("CAGR") of the 30-day volume weighted average price ("VWAP") of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 100% of the number of PSUs upon attainment of a 12% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 200% of the number of PSUs upon attainment of a 15% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024.

F3 · derivative.exercise_date: The Reporting Person will receive a number of shares of Class A common stock equal to 50% of the number of PSUs upon attainment of a 10% compound annual growth rate ("CAGR") of the 30-day volume weighted average price ("VWAP") of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 100% of the number of PSUs upon attainment of a 12% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 200% of the number of PSUs upon attainment of a 15% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024.

F3 · derivative.expiration_date: The Reporting Person will receive a number of shares of Class A common stock equal to 50% of the number of PSUs upon attainment of a 10% compound annual growth rate ("CAGR") of the 30-day volume weighted average price ("VWAP") of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 100% of the number of PSUs upon attainment of a 12% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024. The Reporting Person will receive a number of shares of Class A common stock equal to 200% of the number of PSUs upon attainment of a 15% CAGR of the VWAP of a share of Class A common stock on April 2, 2027 as compared to the VWAP of a share of Class A common stock on April 2, 2024.

SEC source: 0001845437-24-000011 · wk-form4_1712261457.xml · nonDerivative · entry 2

ALLEN BRIAN F. · CIK 0001975816 · COO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 449,077

F2 · shares: Restricted stock units that vest upon the latest to occur of the following three events: (1) The date that is 12 months after the date on which natural gas is first ignited at NET Power's first utility-scale plant; (2) The date of execution by all parties to an agreement related to the first sale by NET Power and its subsidiaries of a license to construct, operate, and maintain a second power plant utilizing the "NET Power Cycle" (the "License Agreement"); and (3) The date of documentation of a final investment decision by the licensee under the above-referenced License Agreement to proceed with constructing the second power plant utilizing the "NET Power Cycle."

SEC source: 0001845437-24-000011 · wk-form4_1712261457.xml · nonDerivative · entry 1

ALLEN BRIAN F. · CIK 0001975816 · COO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,610

F1 · shares: Restricted stock units that vest in three equal installments on each anniversary of April 2, 2024, subject to continued employment.

SEC source: 0001845437-24-000008 · wk-form4_1712176452.xml · nonDerivative · entry 1

Kelliher Joseph T · CIK 0001464551 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,636

F1 · shares: The reporting person received shares of Class A common stock in lieu of cash as payment for his services as a director of NET Power Inc.

SEC source: 0001845437-24-000002 · wk-form4_1704403412.xml · nonDerivative · entry 1

Kelliher Joseph T · CIK 0001464551 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,342

F1 · shares: The reporting person received shares of Class A common stock in lieu of cash as payment for his services as a director of NET Power Inc.

SEC source: 0001845437-23-000038 · wk-form4_1696450198.xml · nonDerivative · entry 1

Kelliher Joseph T · CIK 0001464551 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,755

F1 · shares: The reporting person received shares of Class A common stock in lieu of cash as payment for his services as a director of NET Power Inc.

SEC source: 0001845437-23-000036 · wk-form4_1694723800.xml · nonDerivative · entry 2

MAHON JAMES · CIK 0001975868 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.00 to $15.24, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001845437-23-000036 · wk-form4_1694723800.xml · nonDerivative · entry 1

MAHON JAMES · CIK 0001975868 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,126

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.00 to $15.13, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001845437-23-000034 · wf-form4_169454973580624.xml · nonDerivative · entry 2

MAHON JAMES · CIK 0001975868 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,394

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.00 to $15.44, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001845437-23-000034 · wf-form4_169454973580624.xml · nonDerivative · entry 1

MAHON JAMES · CIK 0001975868 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,394

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.56 to $15.91, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001845437-23-000032 · wf-form4_169420581311687.xml · nonDerivative · entry 2

MAHON JAMES · CIK 0001975868 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,394

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.00 to $15.60, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001845437-23-000032 · wf-form4_169420581311687.xml · nonDerivative · entry 1

MAHON JAMES · CIK 0001975868 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 91,394

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.00 to $15.63, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001845437-23-000026 · wf-form4_169394493121198.xml · nonDerivative · entry 1

Kelliher Joseph T · CIK 0001464551 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,444

F1 · shares: Restricted stock units that vest in three equal installments on each of September 1, 2024, September 1, 2025, and September 1, 2026, subject to continued service as a director.

SEC source: 0001845437-23-000029 · wf-form4_169394520091992.xml · nonDerivative · entry 1

Alexander Ralph · CIK 0001358507 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,444

F1 · shares: Restricted stock units that vest in three equal installments on each of September 1, 2024, September 1, 2025, and September 1, 2026, subject to continued service as a director.

SEC source: 0001845437-23-000030 · wf-form4_169394524327112.xml · nonDerivative · entry 1

Veltmann Alejandra · CIK 0001564633 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,444

F1 · shares: Restricted stock units that vest three equal installments on each of September 1, 2024, September 1, 2025, and September 1, 2026, subject to continued service as a director.

SEC source: 0001845437-23-000028 · wf-form4_169394504765802.xml · nonDerivative · entry 1

PETERSON CAROL R. · CIK 0001973456 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,444

F1 · shares: Restricted stock units that vest in three equal installments on each of September 1, 2024, September 1, 2025, and September 1, 2026, subject to continued service as a director.

SEC source: 0001845437-23-000027 · wf-form4_169394499204649.xml · nonDerivative · entry 1

HEFFINGER BRANDON · CIK 0001975934 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $13.89 to $14.41, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001845437-23-000020 · wf-form4_169359915470179.xml · nonDerivative · entry 2

HEFFINGER BRANDON · CIK 0001975934 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,858

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $13.75 to $14.20, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001845437-23-000020 · wf-form4_169359915470179.xml · nonDerivative · entry 1

HEFFINGER BRANDON · CIK 0001975934 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,858

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $14.08 to $14.83, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001845437-23-000018 · wf-form4_169351386901911.xml · derivative · entry 3

MAHON JAMES · CIK 0001975868 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 593,028

Underlying: Class A Common Stock · 100,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On August 29, 2023, 100,000 Class A Units of NET Power Operations LLC (a subsidiary of the issuer) held by the reporting person were redeemed in exchange for an equal number of shares of the issuer's Class A Common Stock pursuant to a redemption notice from the reporting person dated August 28, 2023, and upon such redemption, 100,000 shares of the issuer's Class B Common Stock held by the reporting person were surrendered to the issuer and canceled.

F1 · derivative.exercise_date: On August 29, 2023, 100,000 Class A Units of NET Power Operations LLC (a subsidiary of the issuer) held by the reporting person were redeemed in exchange for an equal number of shares of the issuer's Class A Common Stock pursuant to a redemption notice from the reporting person dated August 28, 2023, and upon such redemption, 100,000 shares of the issuer's Class B Common Stock held by the reporting person were surrendered to the issuer and canceled.

F1 · derivative.expiration_date: On August 29, 2023, 100,000 Class A Units of NET Power Operations LLC (a subsidiary of the issuer) held by the reporting person were redeemed in exchange for an equal number of shares of the issuer's Class A Common Stock pursuant to a redemption notice from the reporting person dated August 28, 2023, and upon such redemption, 100,000 shares of the issuer's Class B Common Stock held by the reporting person were surrendered to the issuer and canceled.

SEC source: 0001845437-23-000018 · wf-form4_169351386901911.xml · nonDerivative · entry 2

MAHON JAMES · CIK 0001975868 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 593,028

SEC source: 0001845437-23-000018 · wf-form4_169351386901911.xml · nonDerivative · entry 1

MAHON JAMES · CIK 0001975868 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001845437-23-000016 · wf-form4_169342579229557.xml · derivative · entry 3

HEFFINGER BRANDON · CIK 0001975934 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 214,559

Underlying: Class A Common Stock · 150,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On August 28, 2023, 150,000 Class A Units of NET Power Operations LLC (a subsidiary of the issuer) held by the reporting person were redeemed in exchange for an equal number of shares of the issuer's Class A Common Stock pursuant to a redemption notice from the reporting person dated August 23, 2023, and upon such redemption, 150,000 shares of the issuer's Class B Common Stock held by the reporting person were surrendered to the issuer and canceled.

F1 · derivative.exercise_date: On August 28, 2023, 150,000 Class A Units of NET Power Operations LLC (a subsidiary of the issuer) held by the reporting person were redeemed in exchange for an equal number of shares of the issuer's Class A Common Stock pursuant to a redemption notice from the reporting person dated August 23, 2023, and upon such redemption, 150,000 shares of the issuer's Class B Common Stock held by the reporting person were surrendered to the issuer and canceled.

F1 · derivative.expiration_date: On August 28, 2023, 150,000 Class A Units of NET Power Operations LLC (a subsidiary of the issuer) held by the reporting person were redeemed in exchange for an equal number of shares of the issuer's Class A Common Stock pursuant to a redemption notice from the reporting person dated August 23, 2023, and upon such redemption, 150,000 shares of the issuer's Class B Common Stock held by the reporting person were surrendered to the issuer and canceled.

SEC source: 0001845437-23-000016 · wf-form4_169342579229557.xml · nonDerivative · entry 2

HEFFINGER BRANDON · CIK 0001975934 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 214,559

F1 · kind: On August 28, 2023, 150,000 Class A Units of NET Power Operations LLC (a subsidiary of the issuer) held by the reporting person were redeemed in exchange for an equal number of shares of the issuer's Class A Common Stock pursuant to a redemption notice from the reporting person dated August 23, 2023, and upon such redemption, 150,000 shares of the issuer's Class B Common Stock held by the reporting person were surrendered to the issuer and canceled.

SEC source: 0001845437-23-000016 · wf-form4_169342579229557.xml · nonDerivative · entry 1

HEFFINGER BRANDON · CIK 0001975934 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: On August 28, 2023, 150,000 Class A Units of NET Power Operations LLC (a subsidiary of the issuer) held by the reporting person were redeemed in exchange for an equal number of shares of the issuer's Class A Common Stock pursuant to a redemption notice from the reporting person dated August 23, 2023, and upon such redemption, 150,000 shares of the issuer's Class B Common Stock held by the reporting person were surrendered to the issuer and canceled.

SEC source: 0001845437-23-000012 · wf-form4_169282104432205.xml · nonDerivative · entry 1

HEFFINGER BRANDON · CIK 0001975934 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $14.86 to $15.64, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001213900-23-069500 · ownership.xml · nonDerivative · entry 2

HEFFINGER BRANDON · CIK 0001975934 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,771

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $14.90 to $15.60, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001213900-23-069500 · ownership.xml · nonDerivative · entry 1

HEFFINGER BRANDON · CIK 0001975934 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 95,056

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $14.60 to $15.49, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

SEC source: 0001213900-23-068983 · ownership.xml · derivative · entry 4

Derham Kyle · CIK 0001786795 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · The Derham Children's Trust of 2020

Disclosed balance after: 286,320

Underlying: Class A Common Stock · 286,320 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The Opco Class A Units (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F2 · kind: On August 16, 2023, pursuant to the Opco LLCA, all Class B Units of Opco converted into Class A Units of Opco on a one-for-one basis due to the exercise on such date by a member of Opco of its Class B Conversion Right (as defined in the Opco LLCA).

F3 · price: The Opco Class A Units (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F3 · derivative.exercise_date: The Opco Class A Units (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F3 · derivative.expiration_date: The Opco Class A Units (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F4 · ownership.nature: The reporting person is the trustee of The Derham Children's Trust of 2020 (the "Trust"). By virtue of the relationship, the reporting person may be deemed to have or share beneficial ownership of the securities held of record by the Trust, but the reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-068983 · ownership.xml · derivative · entry 3

Derham Kyle · CIK 0001786795 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · The Derham Children's Trust of 2020

Disclosed balance after: 0

Underlying: Class A Common Stock · 286,320 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The Class B Units of NET Power Operations LLC ("Opco") are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability company agreement of Opco (the "Opco LLCA"). The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F2 · kind: On August 16, 2023, pursuant to the Opco LLCA, all Class B Units of Opco converted into Class A Units of Opco on a one-for-one basis due to the exercise on such date by a member of Opco of its Class B Conversion Right (as defined in the Opco LLCA).

F1 · price: The Class B Units of NET Power Operations LLC ("Opco") are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability company agreement of Opco (the "Opco LLCA"). The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F1 · derivative.exercise_date: The Class B Units of NET Power Operations LLC ("Opco") are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability company agreement of Opco (the "Opco LLCA"). The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F1 · derivative.expiration_date: The Class B Units of NET Power Operations LLC ("Opco") are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability company agreement of Opco (the "Opco LLCA"). The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F4 · ownership.nature: The reporting person is the trustee of The Derham Children's Trust of 2020 (the "Trust"). By virtue of the relationship, the reporting person may be deemed to have or share beneficial ownership of the securities held of record by the Trust, but the reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-068983 · ownership.xml · derivative · entry 2

Derham Kyle · CIK 0001786795 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,390,348

Underlying: Class A Common Stock · 1,390,348 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The Opco Class A Units (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F2 · kind: On August 16, 2023, pursuant to the Opco LLCA, all Class B Units of Opco converted into Class A Units of Opco on a one-for-one basis due to the exercise on such date by a member of Opco of its Class B Conversion Right (as defined in the Opco LLCA).

F3 · price: The Opco Class A Units (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F3 · derivative.exercise_date: The Opco Class A Units (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F3 · derivative.expiration_date: The Opco Class A Units (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

SEC source: 0001213900-23-068983 · ownership.xml · derivative · entry 1

Derham Kyle · CIK 0001786795 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 1,390,348 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The Class B Units of NET Power Operations LLC ("Opco") are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability company agreement of Opco (the "Opco LLCA"). The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F2 · kind: On August 16, 2023, pursuant to the Opco LLCA, all Class B Units of Opco converted into Class A Units of Opco on a one-for-one basis due to the exercise on such date by a member of Opco of its Class B Conversion Right (as defined in the Opco LLCA).

F1 · price: The Class B Units of NET Power Operations LLC ("Opco") are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability company agreement of Opco (the "Opco LLCA"). The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F1 · derivative.exercise_date: The Class B Units of NET Power Operations LLC ("Opco") are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability company agreement of Opco (the "Opco LLCA"). The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.

F1 · derivative.expiration_date: The Class B Units of NET Power Operations LLC ("Opco") are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability company agreement of Opco (the "Opco LLCA"). The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into cash or shares of the issuer's Class A common stock on a one-for-one basis, at the issuer's election, and have no expiration date.