NPWR

SEC source: 0001213900-23-066266 · ownership.xml · derivative · entry 3

HEFFINGER BRANDON · CIK 0001975934 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 364,559

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 9, 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 3, 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 · kind: On August 9, 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 3, 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 9, 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 3, 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 9, 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 3, 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: 0001213900-23-066266 · ownership.xml · nonDerivative · entry 2

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 9, 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 3, 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: 0001213900-23-066266 · ownership.xml · nonDerivative · entry 1

HEFFINGER BRANDON · CIK 0001975934 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 364,559

F1 · kind: On August 9, 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 3, 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: 0001213900-23-053630 · ownership.xml · derivative · entry 6

Derham Kyle · CIK 0001786795 · Director

10b5-1 filing: No plan indicated

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

Disclosed balance after: 2,424,635

Underlying: Class A Common Stock · 414,049 shares

Expires 2028-06-08

F1 · kind: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

F1 · price: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

F3 · ownership.nature: The Derham Children's Trust of 2020 (the "Trust") is the record holder of the securities reported herein and the reporting person is the trustee of 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: 0001213900-23-053630 · ownership.xml · derivative · entry 5

Derham Kyle · CIK 0001786795 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,010,586

Underlying: Class A Common Stock · 2,010,586 shares

Expires 2028-06-08

F1 · kind: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

F1 · price: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

SEC source: 0001213900-23-053630 · 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: 1,676,668

Underlying: Class A Common Stock · 286,320 shares

Expires not disclosed

F4 · derivative.exercise_price: The Class B Units of Opco are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into shares of the issuer's Class A common stock or cash, at the issuer's election, on a one-for-one basis and have no expiration date.

F1 · kind: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

F1 · price: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

F4 · derivative.exercise_date: The Class B Units of Opco are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into shares of the issuer's Class A common stock or cash, at the issuer's election, on a one-for-one basis and have no expiration date.

F4 · derivative.expiration_date: The Class B Units of Opco are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into shares of the issuer's Class A common stock or cash, at the issuer's election, on a one-for-one basis and have no expiration date.

F3 · ownership.nature: The Derham Children's Trust of 2020 (the "Trust") is the record holder of the securities reported herein and the reporting person is the trustee of 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: 0001213900-23-053630 · ownership.xml · derivative · entry 3

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

F4 · derivative.exercise_price: The Class B Units of Opco are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into shares of the issuer's Class A common stock or cash, at the issuer's election, on a one-for-one basis and have no expiration date.

F1 · kind: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

F1 · price: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

F4 · derivative.exercise_date: The Class B Units of Opco are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into shares of the issuer's Class A common stock or cash, at the issuer's election, on a one-for-one basis and have no expiration date.

F4 · derivative.expiration_date: The Class B Units of Opco are convertible into Class A Units of Opco on a one-for-one basis pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of the issuer's Class B common stock) are then exchangeable into shares of the issuer's Class A common stock or cash, at the issuer's election, on a one-for-one basis and have no expiration date.

SEC source: 0001213900-23-053630 · ownership.xml · nonDerivative · entry 2

Derham Kyle · CIK 0001786795 · Director

10b5-1 filing: No plan indicated

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

Disclosed balance after: 1,676,668

F1 · kind: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

F1 · price: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

F2 · balance_after: Prior to the distribution by Sponsor referred to in footnote 1, the reporting person was a managing member of Sponsor, and as such, the reporting person may have been deemed to have beneficial ownership of the securities held of record by Sponsor and the reporting person's prior Form 4s included transactions and direct holdings of Sponsor.

F3 · ownership.nature: The Derham Children's Trust of 2020 (the "Trust") is the record holder of the securities reported herein and the reporting person is the trustee of 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: 0001213900-23-053630 · ownership.xml · nonDerivative · entry 1

Derham Kyle · CIK 0001786795 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,390,348

F1 · kind: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

F1 · price: Received from Rice Acquisition Sponsor LLC ("Sponsor") pursuant to the pro rata distribution of all of the securities of the issuer held by Sponsor to its members.

F2 · balance_after: Prior to the distribution by Sponsor referred to in footnote 1, the reporting person was a managing member of Sponsor, and as such, the reporting person may have been deemed to have beneficial ownership of the securities held of record by Sponsor and the reporting person's prior Form 4s included transactions and direct holdings of Sponsor.

SEC source: 0001213900-23-053627 · ownership.xml · derivative · entry 5

Rice Acquisition Sponsor II LLC · CIK 0001845421 · Former Director and 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 10,900,000 shares

Expires 2028-06-08

F1 · kind: Represents the pro rata distribution of the securities of the issuer held by the reporting person to all of its members. Prior to such distribution, and as of the date hereof, no such securities have been disposed of for cash by either the reporting person or its members.

F1 · price: Represents the pro rata distribution of the securities of the issuer held by the reporting person to all of its members. Prior to such distribution, and as of the date hereof, no such securities have been disposed of for cash by either the reporting person or its members.

SEC source: 0001213900-23-053627 · ownership.xml · derivative · entry 4

Rice Acquisition Sponsor II LLC · CIK 0001845421 · Former Director and 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 7,534,900 shares

Expires not disclosed

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

F1 · kind: Represents the pro rata distribution of the securities of the issuer held by the reporting person to all of its members. Prior to such distribution, and as of the date hereof, no such securities have been disposed of for cash by either the reporting person or its members.

F1 · price: Represents the pro rata distribution of the securities of the issuer held by the reporting person to all of its members. Prior to such distribution, and as of the date hereof, no such securities have been disposed of for cash by either the reporting person or its members.

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

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

SEC source: 0001213900-23-053627 · ownership.xml · derivative · entry 3

Rice Acquisition Sponsor II LLC · CIK 0001845421 · Former Director and 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 100 shares

Expires not disclosed

F2 · derivative.exercise_price: The Class A Units of NET Power Operations LLC ("Opco") (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into shares of the issuer's Class A common stock or cash, at the issuer's election, on a one-for-one basis and have no expiration date.

F1 · kind: Represents the pro rata distribution of the securities of the issuer held by the reporting person to all of its members. Prior to such distribution, and as of the date hereof, no such securities have been disposed of for cash by either the reporting person or its members.

F1 · price: Represents the pro rata distribution of the securities of the issuer held by the reporting person to all of its members. Prior to such distribution, and as of the date hereof, no such securities have been disposed of for cash by either the reporting person or its members.

F2 · derivative.exercise_date: The Class A Units of NET Power Operations LLC ("Opco") (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into shares of the issuer's Class A common stock or cash, at the issuer's election, on a one-for-one basis and have no expiration date.

F2 · derivative.expiration_date: The Class A Units of NET Power Operations LLC ("Opco") (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into shares of the issuer's Class A common stock or cash, at the issuer's election, on a one-for-one basis and have no expiration date.

SEC source: 0001213900-23-053627 · ownership.xml · nonDerivative · entry 2

Rice Acquisition Sponsor II LLC · CIK 0001845421 · Former Director and 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · kind: Represents the pro rata distribution of the securities of the issuer held by the reporting person to all of its members. Prior to such distribution, and as of the date hereof, no such securities have been disposed of for cash by either the reporting person or its members.

F1 · price: Represents the pro rata distribution of the securities of the issuer held by the reporting person to all of its members. Prior to such distribution, and as of the date hereof, no such securities have been disposed of for cash by either the reporting person or its members.

SEC source: 0001213900-23-053627 · ownership.xml · nonDerivative · entry 1

Rice Acquisition Sponsor II LLC · CIK 0001845421 · Former Director and 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · kind: Represents the pro rata distribution of the securities of the issuer held by the reporting person to all of its members. Prior to such distribution, and as of the date hereof, no such securities have been disposed of for cash by either the reporting person or its members.

F1 · price: Represents the pro rata distribution of the securities of the issuer held by the reporting person to all of its members. Prior to such distribution, and as of the date hereof, no such securities have been disposed of for cash by either the reporting person or its members.

SEC source: 0001213900-23-048310 · ownership.xml · derivative · entry 2

FORREST BROCK · CIK 0001980281 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Forrest Family Capital, LLC

Disclosed balance after: 596,917

Underlying: Class A common stock · 596,917 shares

Expires not disclosed

F2 · derivative.exercise_price: The Opco 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, at the issuer's election, on a one-for-one basis and have no expiration date.

F1 · kind: On June 8, 2023, as a result of the consummation of the transactions (the "Business Combination") contemplated by that certain Business Combination Agreement, dated December 13, 2022 and subsequently amended on April 23, 2023, by and among the issuer, NET Power Operations LLC (f/k/a Rice Acquisition Holdings II LLC) ("Opco"), Topo Buyer Co, LLC, Topo Merger Sub, LLC and NET Power, LLC ("Old NET Power"), in exchange for the equity interests of Old NET Power, which were cancelled, Forrest Family Capital, LLC received Class A units of Opco (the "Opco Units") and a corresponding number of shares of the issuer's Class B common stock (which together are exchangeable into shares of the issuer's Class A Common Stock on a one-for-one basis).

F1 · price: On June 8, 2023, as a result of the consummation of the transactions (the "Business Combination") contemplated by that certain Business Combination Agreement, dated December 13, 2022 and subsequently amended on April 23, 2023, by and among the issuer, NET Power Operations LLC (f/k/a Rice Acquisition Holdings II LLC) ("Opco"), Topo Buyer Co, LLC, Topo Merger Sub, LLC and NET Power, LLC ("Old NET Power"), in exchange for the equity interests of Old NET Power, which were cancelled, Forrest Family Capital, LLC received Class A units of Opco (the "Opco Units") and a corresponding number of shares of the issuer's Class B common stock (which together are exchangeable into shares of the issuer's Class A Common Stock on a one-for-one basis).

F2 · derivative.exercise_date: The Opco 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, at the issuer's election, on a one-for-one basis and have no expiration date.

F2 · derivative.expiration_date: The Opco 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, at the issuer's election, on a one-for-one basis and have no expiration date.

SEC source: 0001213900-23-048310 · ownership.xml · nonDerivative · entry 1

FORREST BROCK · CIK 0001980281 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Forrest Family Capital, LLC

Disclosed balance after: 596,917

F1 · kind: On June 8, 2023, as a result of the consummation of the transactions (the "Business Combination") contemplated by that certain Business Combination Agreement, dated December 13, 2022 and subsequently amended on April 23, 2023, by and among the issuer, NET Power Operations LLC (f/k/a Rice Acquisition Holdings II LLC) ("Opco"), Topo Buyer Co, LLC, Topo Merger Sub, LLC and NET Power, LLC ("Old NET Power"), in exchange for the equity interests of Old NET Power, which were cancelled, Forrest Family Capital, LLC received Class A units of Opco (the "Opco Units") and a corresponding number of shares of the issuer's Class B common stock (which together are exchangeable into shares of the issuer's Class A Common Stock on a one-for-one basis).

F1 · price: On June 8, 2023, as a result of the consummation of the transactions (the "Business Combination") contemplated by that certain Business Combination Agreement, dated December 13, 2022 and subsequently amended on April 23, 2023, by and among the issuer, NET Power Operations LLC (f/k/a Rice Acquisition Holdings II LLC) ("Opco"), Topo Buyer Co, LLC, Topo Merger Sub, LLC and NET Power, LLC ("Old NET Power"), in exchange for the equity interests of Old NET Power, which were cancelled, Forrest Family Capital, LLC received Class A units of Opco (the "Opco Units") and a corresponding number of shares of the issuer's Class B common stock (which together are exchangeable into shares of the issuer's Class A Common Stock on a one-for-one basis).

SEC source: 0001213900-23-048018 · ownership.xml · derivative · entry 4

LYTAL JAMES H · CIK 0001006299 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Class A Common Stock · 30,000 shares

Expires not disclosed

F4 · derivative.exercise_price: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock") and (c) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F4 · price: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F4 · derivative.exercise_date: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F4 · derivative.expiration_date: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

SEC source: 0001213900-23-048018 · ownership.xml · derivative · entry 3

LYTAL JAMES H · CIK 0001006299 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 30,000 shares

Expires not disclosed

F3 · derivative.exercise_price: For each Class B Unit of RONI Opco, the reporting person owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock") and (c) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · price: For each Class B Unit of RONI Opco, the reporting person owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F3 · derivative.exercise_date: For each Class B Unit of RONI Opco, the reporting person owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F3 · derivative.expiration_date: For each Class B Unit of RONI Opco, the reporting person owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

SEC source: 0001213900-23-048018 · ownership.xml · nonDerivative · entry 2

LYTAL JAMES H · CIK 0001006299 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock") and (c) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

SEC source: 0001213900-23-048018 · ownership.xml · nonDerivative · entry 1

LYTAL JAMES H · CIK 0001006299 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock") and (c) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

SEC source: 0001213900-23-048020 · ownership.xml · derivative · entry 4

Famuagun Jide · CIK 0001865522 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Class A Common Stock · 30,000 shares

Expires not disclosed

F4 · derivative.exercise_price: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock") and (c) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F4 · price: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F4 · derivative.exercise_date: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F4 · derivative.expiration_date: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

SEC source: 0001213900-23-048020 · ownership.xml · derivative · entry 3

Famuagun Jide · CIK 0001865522 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 30,000 shares

Expires not disclosed

F3 · derivative.exercise_price: For each Class B Unit of RONI Opco, the reporting person owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock") and (c) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · price: For each Class B Unit of RONI Opco, the reporting person owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F3 · derivative.exercise_date: For each Class B Unit of RONI Opco, the reporting person owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F3 · derivative.expiration_date: For each Class B Unit of RONI Opco, the reporting person owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

SEC source: 0001213900-23-048020 · ownership.xml · nonDerivative · entry 2

Famuagun Jide · CIK 0001865522 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock") and (c) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

SEC source: 0001213900-23-048020 · ownership.xml · nonDerivative · entry 1

Famuagun Jide · CIK 0001865522 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock") and (c) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

SEC source: 0001213900-23-048267 · ownership.xml · derivative · entry 12

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 10,900,000

Underlying: Class A Common Stock · 10,900,000 shares

Expires 2028-06-08

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048267 · ownership.xml · derivative · entry 11

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 10,900,000 shares

Expires 2028-06-08

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048267 · ownership.xml · derivative · entry 10

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 7,534,900

Underlying: Class A Common Stock · 1,000,000 shares

Expires not disclosed

F8 · derivative.exercise_price: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F4 · kind: Immediately upon the consummation of the Business Combination, pursuant to the Sponsor Letter Agreement, dated as of December 13, 2022, by and among RONI, the Sponsor, RONI Opco, NET Power, LLC and the other parties thereto, 1,000,000 shares of Class B Common Stock and 1,000,000 Class B Units of Opco held by the Sponsor were forfeited to NET Power and Opco, respectively, for no consideration and automatically canceled.

F4 · price: Immediately upon the consummation of the Business Combination, pursuant to the Sponsor Letter Agreement, dated as of December 13, 2022, by and among RONI, the Sponsor, RONI Opco, NET Power, LLC and the other parties thereto, 1,000,000 shares of Class B Common Stock and 1,000,000 Class B Units of Opco held by the Sponsor were forfeited to NET Power and Opco, respectively, for no consideration and automatically canceled.

F8 · derivative.exercise_date: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F8 · derivative.expiration_date: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048267 · ownership.xml · derivative · entry 9

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 8,534,900

Underlying: Class A Common Stock · 8,534,900 shares

Expires not disclosed

F8 · derivative.exercise_price: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F8 · derivative.exercise_date: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F8 · derivative.expiration_date: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048267 · ownership.xml · derivative · entry 8

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 8,534,900 shares

Expires not disclosed

F7 · derivative.exercise_price: For each Class B Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F7 · derivative.exercise_date: For each Class B Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F7 · derivative.expiration_date: For each Class B Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048267 · ownership.xml · derivative · entry 7

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 100

Underlying: Class A Common Stock · 100 shares

Expires not disclosed

F6 · derivative.exercise_price: For each Class A Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class A Units of Opco (together with the corresponding share of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F6 · derivative.exercise_date: For each Class A Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class A Units of Opco (together with the corresponding share of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F6 · derivative.expiration_date: For each Class A Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class A Units of Opco (together with the corresponding share of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048267 · ownership.xml · derivative · entry 6

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 100 shares

Expires not disclosed

F5 · derivative.exercise_price: For each Class A Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F5 · derivative.exercise_date: For each Class A Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F5 · derivative.expiration_date: For each Class A Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048267 · ownership.xml · nonDerivative · entry 5

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 7,535,000

F4 · price: Immediately upon the consummation of the Business Combination, pursuant to the Sponsor Letter Agreement, dated as of December 13, 2022, by and among RONI, the Sponsor, RONI Opco, NET Power, LLC and the other parties thereto, 1,000,000 shares of Class B Common Stock and 1,000,000 Class B Units of Opco held by the Sponsor were forfeited to NET Power and Opco, respectively, for no consideration and automatically canceled.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048267 · ownership.xml · nonDerivative · entry 4

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 8,535,000

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048267 · ownership.xml · nonDerivative · entry 3

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 0

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048267 · ownership.xml · nonDerivative · entry 2

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 2,500

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048267 · ownership.xml · nonDerivative · entry 1

Rice Daniel J. IV · CIK 0001597380 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 0

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · derivative · entry 13

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 10,900,000

Underlying: Class A Common Stock · 10,900,000 shares

Expires 2028-06-08

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · derivative · entry 12

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 10,900,000 shares

Expires 2028-06-08

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · derivative · entry 11

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 7,534,900

Underlying: Class A Common Stock · 1,000,000 shares

Expires not disclosed

F9 · derivative.exercise_price: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F5 · kind: Immediately upon the consummation of the Business Combination, pursuant to the Sponsor Letter Agreement, dated as of December 13, 2022, by and among RONI, the Sponsor, RONI Opco, NET Power, LLC and the other parties thereto, 1,000,000 shares of Class B Common Stock and 1,000,000 Class B Units of Opco held by the Sponsor were forfeited to NET Power and Opco, respectively, for no consideration and automatically canceled.

F5 · price: Immediately upon the consummation of the Business Combination, pursuant to the Sponsor Letter Agreement, dated as of December 13, 2022, by and among RONI, the Sponsor, RONI Opco, NET Power, LLC and the other parties thereto, 1,000,000 shares of Class B Common Stock and 1,000,000 Class B Units of Opco held by the Sponsor were forfeited to NET Power and Opco, respectively, for no consideration and automatically canceled.

F9 · derivative.exercise_date: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F9 · derivative.expiration_date: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · derivative · entry 10

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 8,534,900

Underlying: Class A Common Stock · 8,534,900 shares

Expires not disclosed

F9 · derivative.exercise_price: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F9 · derivative.exercise_date: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F9 · derivative.expiration_date: For each Class B Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · derivative · entry 9

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 8,534,900 shares

Expires not disclosed

F8 · derivative.exercise_price: For each Class B Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F8 · derivative.exercise_date: For each Class B Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F8 · derivative.expiration_date: For each Class B Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class B Units of RONI Opco were convertible into Class A Units of RONI Opco pursuant to the terms of the limited liability agreement of RONI Opco. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · derivative · entry 8

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 100

Underlying: Class A Common Stock · 100 shares

Expires not disclosed

F7 · derivative.exercise_price: For each Class A Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class A Units of Opco (together with the corresponding share of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F7 · derivative.exercise_date: For each Class A Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class A Units of Opco (together with the corresponding share of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F7 · derivative.expiration_date: For each Class A Unit of Opco, the Sponsor owns a corresponding share of Class B Common Stock. The Class A Units of Opco (together with the corresponding share of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · derivative · entry 7

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 100 shares

Expires not disclosed

F6 · derivative.exercise_price: For each Class A Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F6 · derivative.exercise_date: For each Class A Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F6 · derivative.expiration_date: For each Class A Unit of RONI Opco, the Sponsor owned a corresponding Class B Ordinary Share. The Class A Units of RONI Opco (together with the corresponding Class B Ordinary Shares) were exchangeable into Class A Ordinary Shares or cash, at RONI's election, after the time of RONI's initial business combination on a one-for-one basis and had no expiration date.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · nonDerivative · entry 6

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 7,535,000

F5 · price: Immediately upon the consummation of the Business Combination, pursuant to the Sponsor Letter Agreement, dated as of December 13, 2022, by and among RONI, the Sponsor, RONI Opco, NET Power, LLC and the other parties thereto, 1,000,000 shares of Class B Common Stock and 1,000,000 Class B Units of Opco held by the Sponsor were forfeited to NET Power and Opco, respectively, for no consideration and automatically canceled.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · nonDerivative · entry 5

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 8,535,000

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · nonDerivative · entry 4

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 0

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · nonDerivative · entry 3

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 502,500

F4 · price: On December 13, 2022, RONI entered into subscription agreements with certain investors (the "PIPE Investors") pursuant to which the PIPE Investors agreed to purchase shares of Class A Common Stock for $10.00 per share in connection with, and conditioned upon, the substantially concurrent consummation of the Business Combination. As one of the PIPE Investors, on June 8, 2023, the reporting person acquired 500,000 shares of Class A Common Stock for $10.00 per share.

SEC source: 0001213900-23-048268 · ownership.xml · nonDerivative · entry 2

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 2,500

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048268 · ownership.xml · nonDerivative · entry 1

Derham Kyle · CIK 0001786795 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rice Acquisition Sponsor II LLC

Disclosed balance after: 0

F1 · price: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · price: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock"), (c) each issued and outstanding warrant of RONI (which were exercisable for a Class A Ordinary Share) automatically converted into a warrant to purchase one share of Class A Common Stock, and (d) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F3 · ownership.nature: The reporting person is a managing member of Rice Acquisition Sponsor II LLC (the "Sponsor"). As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by the Sponsor. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-23-048017 · ownership.xml · derivative · entry 4

Fox Carrie M · CIK 0001840838 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Class A Common Stock · 30,000 shares

Expires not disclosed

F4 · derivative.exercise_price: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F1 · kind: Pursuant to that certain Business Combination Agreement, dated December 13, 2022, and subsequently amended on April 23, 2023, by and among Rice Acquisition Corp. II ("RONI"), Rice Acquisition Holdings II LLC ("RONI Opco"), NET Power, LLC and the other parties thereto, the parties effected a business combination transaction (the "Business Combination") on June 8, 2023. In connection with the Business Combination, on June 8, 2023, RONI domesticated as a Delaware corporation (the "RONI Domestication") and changed its name to "NET Power Inc." ("NET Power") and RONI Opco domesticated as a Delaware limited liability company (together with the RONI Domestication, the "Domestication") and changed its name to "NET Power Operations LLC" ("Opco").

F2 · kind: As a result of the Domestication on June 8, 2023, (a) each issued and outstanding Class A ordinary share, par value $0.0001 per share, of RONI ("Class A Ordinary Share") automatically converted on a one-for-one basis into a share of Class A common stock, par value $0.0001 per share, of NET Power ("Class A Common Stock"), (b) each issued and outstanding Class B ordinary shares, par value $0.0001 per share, of RONI ("Class B Ordinary Share") automatically converted on a one-for-one basis into a share of Class B common stock, par value $0.0001 per share, of NET Power ("Class B Common Stock") and (c) each issued and outstanding Class A Unit and Class B Unit of RONI Opco automatically converted on a one-for-one basis into a Class A or Class B Unit of Opco, respectively.

F4 · price: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F4 · derivative.exercise_date: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.

F4 · derivative.expiration_date: For each Class B Unit of Opco, the reporting person owns a corresponding share of Class B Common Stock. The Class B Units of Opco are convertible into Class A Units of Opco pursuant to the terms of the limited liability agreement of Opco. The Class A Units of Opco (together with the corresponding shares of Class B Common Stock) are exchangeable into shares of Class A Common Stock or cash, at NET Power's election, on a one-for-one basis and have no expiration date.