{"transactions":[{"id":1007743,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":1,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Units of NET Power Operations LLC","published_at":"2025-11-05T02:03:36.000Z","date":"2025-11-02","kind":"other","planned":false,"acquired":false,"shares":22729880,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"For each Class A Unit of Net Power Operations LLC, NPEH owns one corresponding share of Class B Common Stock of the Issuer. The Class A Units of NET Power Operations LLC are exchangeable (together with the cancellation of a corresponding number of shares of the Issuer's Class B Common Stock) into shares of the Issuer's Class A Common Stock on a one-for-one basis or, at the Issuer's election, cash, and have no expiration date."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The securities reported in this Form 4 are directly held by NPEH, a limited liability company of which the Reporting Person was the indirect majority owner. On November 2, 2025, the Reporting Person sold 100% of the equity interests of 8RCH, LLC, which holds 50% of the equity interests of each of Tillandsia, Inc. (\"Tillandsia\"), Areca, Inc. (\"Areca\") and Chamaedorea, Inc. (\"Chamaedoria\"). Tillandsia, Areca and Chamaedorea own approximately 18.6%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC (\"8 Rivers\"). 8 Rivers is the manager and owns approximately 91.4% of NPEH."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The securities reported in this Form 4 are directly held by NPEH, a limited liability company of which the Reporting Person was the indirect majority owner. On November 2, 2025, the Reporting Person sold 100% of the equity interests of 8RCH, LLC, which holds 50% of the equity interests of each of Tillandsia, Inc. (\"Tillandsia\"), Areca, Inc. (\"Areca\") and Chamaedorea, Inc. (\"Chamaedoria\"). Tillandsia, Areca and Chamaedorea own approximately 18.6%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC (\"8 Rivers\"). 8 Rivers is the manager and owns approximately 91.4% of NPEH."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"For each Class A Unit of Net Power Operations LLC, NPEH owns one corresponding share of Class B Common Stock of the Issuer. The Class A Units of NET Power Operations LLC are exchangeable (together with the cancellation of a corresponding number of shares of the Issuer's Class B Common Stock) into shares of the Issuer's Class A Common Stock on a one-for-one basis or, at the Issuer's election, cash, and have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"For each Class A Unit of Net Power Operations LLC, NPEH owns one corresponding share of Class B Common Stock of the Issuer. The Class A Units of NET Power Operations LLC are exchangeable (together with the cancellation of a corresponding number of shares of the Issuer's Class B Common Stock) into shares of the Issuer's Class A Common Stock on a one-for-one basis or, at the Issuer's election, cash, and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities reported in this Form 4 are directly held by NPEH, a limited liability company of which the Reporting Person was the indirect majority owner. On November 2, 2025, the Reporting Person sold 100% of the equity interests of 8RCH, LLC, which holds 50% of the equity interests of each of Tillandsia, Inc. (\"Tillandsia\"), Areca, Inc. (\"Areca\") and Chamaedorea, Inc. (\"Chamaedoria\"). Tillandsia, Areca and Chamaedorea own approximately 18.6%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC (\"8 Rivers\"). 8 Rivers is the manager and owns approximately 91.4% of NPEH."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"For each Class A Unit of Net Power Operations LLC, NPEH owns one corresponding share of Class B Common Stock of the Issuer. The Class A Units of NET Power Operations LLC are exchangeable (together with the cancellation of a corresponding number of shares of the Issuer's Class B Common Stock) into shares of the Issuer's Class A Common Stock on a one-for-one basis or, at the Issuer's election, cash, and have no expiration date."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":22729880},"source":{"system":"sec-edgar","filing":"0001104659-25-106545","document":"tm2530009-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925106545/tm2530009-1_4seq1.xml","form_type":"4"}},{"id":1007742,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":1,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class B Common Stock","published_at":"2025-11-05T02:03:36.000Z","date":"2025-11-02","kind":"other","planned":false,"acquired":false,"shares":22729880,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The securities reported in this Form 4 are directly held by NPEH, a limited liability company of which the Reporting Person was the indirect majority owner. On November 2, 2025, the Reporting Person sold 100% of the equity interests of 8RCH, LLC, which holds 50% of the equity interests of each of Tillandsia, Inc. (\"Tillandsia\"), Areca, Inc. (\"Areca\") and Chamaedorea, Inc. (\"Chamaedoria\"). Tillandsia, Areca and Chamaedorea own approximately 18.6%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC (\"8 Rivers\"). 8 Rivers is the manager and owns approximately 91.4% of NPEH."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The securities reported in this Form 4 are directly held by NPEH, a limited liability company of which the Reporting Person was the indirect majority owner. On November 2, 2025, the Reporting Person sold 100% of the equity interests of 8RCH, LLC, which holds 50% of the equity interests of each of Tillandsia, Inc. (\"Tillandsia\"), Areca, Inc. (\"Areca\") and Chamaedorea, Inc. (\"Chamaedoria\"). Tillandsia, Areca and Chamaedorea own approximately 18.6%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC (\"8 Rivers\"). 8 Rivers is the manager and owns approximately 91.4% of NPEH."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities reported in this Form 4 are directly held by NPEH, a limited liability company of which the Reporting Person was the indirect majority owner. On November 2, 2025, the Reporting Person sold 100% of the equity interests of 8RCH, LLC, which holds 50% of the equity interests of each of Tillandsia, Inc. (\"Tillandsia\"), Areca, Inc. (\"Areca\") and Chamaedorea, Inc. (\"Chamaedoria\"). Tillandsia, Areca and Chamaedorea own approximately 18.6%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC (\"8 Rivers\"). 8 Rivers is the manager and owns approximately 91.4% of NPEH."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"For each Class A Unit of Net Power Operations LLC, NPEH owns one corresponding share of Class B Common Stock of the Issuer. The Class A Units of NET Power Operations LLC are exchangeable (together with the cancellation of a corresponding number of shares of the Issuer's Class B Common Stock) into shares of the Issuer's Class A Common Stock on a one-for-one basis or, at the Issuer's election, cash, and have no expiration date."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001104659-25-106545","document":"tm2530009-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925106545/tm2530009-1_4seq1.xml","form_type":"4"}},{"id":1007741,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":1,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-11-05T02:03:36.000Z","date":"2025-11-02","kind":"other","planned":false,"acquired":false,"shares":1847130,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The securities reported in this Form 4 are directly held by NPEH, a limited liability company of which the Reporting Person was the indirect majority owner. On November 2, 2025, the Reporting Person sold 100% of the equity interests of 8RCH, LLC, which holds 50% of the equity interests of each of Tillandsia, Inc. (\"Tillandsia\"), Areca, Inc. (\"Areca\") and Chamaedorea, Inc. (\"Chamaedoria\"). Tillandsia, Areca and Chamaedorea own approximately 18.6%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC (\"8 Rivers\"). 8 Rivers is the manager and owns approximately 91.4% of NPEH."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The securities reported in this Form 4 are directly held by NPEH, a limited liability company of which the Reporting Person was the indirect majority owner. On November 2, 2025, the Reporting Person sold 100% of the equity interests of 8RCH, LLC, which holds 50% of the equity interests of each of Tillandsia, Inc. (\"Tillandsia\"), Areca, Inc. (\"Areca\") and Chamaedorea, Inc. (\"Chamaedoria\"). Tillandsia, Areca and Chamaedorea own approximately 18.6%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC (\"8 Rivers\"). 8 Rivers is the manager and owns approximately 91.4% of NPEH."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities reported in this Form 4 are directly held by NPEH, a limited liability company of which the Reporting Person was the indirect majority owner. On November 2, 2025, the Reporting Person sold 100% of the equity interests of 8RCH, LLC, which holds 50% of the equity interests of each of Tillandsia, Inc. (\"Tillandsia\"), Areca, Inc. (\"Areca\") and Chamaedorea, Inc. (\"Chamaedoria\"). Tillandsia, Areca and Chamaedorea own approximately 18.6%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC (\"8 Rivers\"). 8 Rivers is the manager and owns approximately 91.4% of NPEH."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"For each Class A Unit of Net Power Operations LLC, NPEH owns one corresponding share of Class B Common Stock of the Issuer. The Class A Units of NET Power Operations LLC are exchangeable (together with the cancellation of a corresponding number of shares of the Issuer's Class B Common Stock) into shares of the Issuer's Class A Common Stock on a one-for-one basis or, at the Issuer's election, cash, and have no expiration date."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001104659-25-106545","document":"tm2530009-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925106545/tm2530009-1_4seq1.xml","form_type":"4"}},{"id":1007740,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":1,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-11-05T02:03:36.000Z","date":"2025-10-31","kind":"sale","planned":false,"acquired":false,"shares":18116,"price":4.0527,"value":73418.7132,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.05 to $4.06. NPEH, LLC (\"NPEH\") will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities reported in this Form 4 are directly held by NPEH, a limited liability company of which the Reporting Person was the indirect majority owner. On November 2, 2025, the Reporting Person sold 100% of the equity interests of 8RCH, LLC, which holds 50% of the equity interests of each of Tillandsia, Inc. (\"Tillandsia\"), Areca, Inc. (\"Areca\") and Chamaedorea, Inc. (\"Chamaedoria\"). Tillandsia, Areca and Chamaedorea own approximately 18.6%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC (\"8 Rivers\"). 8 Rivers is the manager and owns approximately 91.4% of NPEH."}],"balance_after":1847130,"source":{"system":"sec-edgar","filing":"0001104659-25-106545","document":"tm2530009-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925106545/tm2530009-1_4seq1.xml","form_type":"4"}},{"id":1011146,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-30T23:38:50.000Z","date":"2025-10-30","kind":"sale","planned":false,"acquired":false,"shares":107754,"price":4.0376,"value":435067.5504,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.00 to $4.105. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1865246,"source":{"system":"sec-edgar","filing":"0001104659-25-104536","document":"tm2529849-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925104536/tm2529849-1_4seq1.xml","form_type":"4"}},{"id":1011145,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-30T23:38:50.000Z","date":"2025-10-29","kind":"sale","planned":false,"acquired":false,"shares":786832,"price":4.1166,"value":3239072.6112,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.72 to $4.315. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1973000,"source":{"system":"sec-edgar","filing":"0001104659-25-104536","document":"tm2529849-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925104536/tm2529849-1_4seq1.xml","form_type":"4"}},{"id":1011144,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-30T23:38:50.000Z","date":"2025-10-28","kind":"sale","planned":false,"acquired":false,"shares":7585,"price":3.7695,"value":28591.6575,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.72 to $3.78. NPEH, LLC (\"NPEH\") will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2759832,"source":{"system":"sec-edgar","filing":"0001104659-25-104536","document":"tm2529849-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925104536/tm2529849-1_4seq1.xml","form_type":"4"}},{"id":1013057,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-27T23:54:50.000Z","date":"2025-10-27","kind":"sale","planned":false,"acquired":false,"shares":200000,"price":3.7662,"value":753240.0,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.705 to $3.85. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2767417,"source":{"system":"sec-edgar","filing":"0001104659-25-102683","document":"tm2529510-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925102683/tm2529510-1_4seq1.xml","form_type":"4"}},{"id":1013056,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-27T23:54:50.000Z","date":"2025-10-24","kind":"sale","planned":false,"acquired":false,"shares":32583,"price":3.7039,"value":120684.1737,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.70 to $3.725. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2967417,"source":{"system":"sec-edgar","filing":"0001104659-25-102683","document":"tm2529510-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925102683/tm2529510-1_4seq1.xml","form_type":"4"}},{"id":1013055,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-27T23:54:50.000Z","date":"2025-10-23","kind":"sale","planned":false,"acquired":false,"shares":284100,"price":3.6901,"value":1048357.41,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.33 to $4.05. NPEH, LLC (\"NPEH\") will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":3000000,"source":{"system":"sec-edgar","filing":"0001104659-25-102683","document":"tm2529510-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925102683/tm2529510-1_4seq1.xml","form_type":"4"}},{"id":1014481,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-23T00:55:02.000Z","date":"2025-10-22","kind":"sale","planned":false,"acquired":false,"shares":89000,"price":3.3071,"value":294331.9,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.225 to $3.365. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":3284100,"source":{"system":"sec-edgar","filing":"0001104659-25-101628","document":"tm2529224-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925101628/tm2529224-2_4seq1.xml","form_type":"4"}},{"id":1014480,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-23T00:55:02.000Z","date":"2025-10-21","kind":"sale","planned":false,"acquired":false,"shares":189300,"price":3.5307,"value":668361.51,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.51 to $3.5775. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":3373100,"source":{"system":"sec-edgar","filing":"0001104659-25-101628","document":"tm2529224-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925101628/tm2529224-2_4seq1.xml","form_type":"4"}},{"id":1014479,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-23T00:55:02.000Z","date":"2025-10-20","kind":"sale","planned":false,"acquired":false,"shares":201000,"price":3.5784,"value":719258.4,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.51 to $3.72. NPEH, LLC (\"NPEH\") will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":3562400,"source":{"system":"sec-edgar","filing":"0001104659-25-101628","document":"tm2529224-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925101628/tm2529224-2_4seq1.xml","form_type":"4"}},{"id":1017425,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Units of NET Power Operations LLC","published_at":"2025-10-17T01:01:01.000Z","date":"2025-10-14","kind":"exercise","planned":false,"acquired":false,"shares":4000000,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On October 14, 2025, NPEH, LLC (\"NPEH\") exchanged 4,000,000 Class A Units of NET Power Operations LLC for 4,000,000 shares of the Issuer's Class A Common Stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On October 14, 2025, NPEH, LLC (\"NPEH\") exchanged 4,000,000 Class A Units of NET Power Operations LLC for 4,000,000 shares of the Issuer's Class A Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On October 14, 2025, NPEH, LLC (\"NPEH\") exchanged 4,000,000 Class A Units of NET Power Operations LLC for 4,000,000 shares of the Issuer's Class A Common Stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On October 14, 2025, NPEH, LLC (\"NPEH\") exchanged 4,000,000 Class A Units of NET Power Operations LLC for 4,000,000 shares of the Issuer's Class A Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.67 to $4.93. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":22729880,"derivative":{"underlying":"Class A Common Stock","underlying_shares":4000000},"source":{"system":"sec-edgar","filing":"0001104659-25-100173","document":"tm2528899-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925100173/tm2528899-1_4seq1.xml","form_type":"4"}},{"id":1017424,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-17T01:01:01.000Z","date":"2025-10-16","kind":"sale","planned":false,"acquired":false,"shares":13959,"price":4.7061,"value":65692.4499,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.50 to $4.83. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Damian Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of these securities except to the extent of his or her pecuniary interest therein."}],"balance_after":3763400,"source":{"system":"sec-edgar","filing":"0001104659-25-100173","document":"tm2528899-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925100173/tm2528899-1_4seq1.xml","form_type":"4"}},{"id":1017423,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-17T01:01:01.000Z","date":"2025-10-15","kind":"sale","planned":false,"acquired":false,"shares":122641,"price":4.8786,"value":598316.3826,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.85 to $4.925. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Damian Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of these securities except to the extent of his or her pecuniary interest therein."}],"balance_after":3777359,"source":{"system":"sec-edgar","filing":"0001104659-25-100173","document":"tm2528899-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925100173/tm2528899-1_4seq1.xml","form_type":"4"}},{"id":1017422,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-17T01:01:01.000Z","date":"2025-10-15","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":4.8321,"value":483210.0,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.67 to $4.93. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Damian Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of these securities except to the extent of his or her pecuniary interest therein."}],"balance_after":3900000,"source":{"system":"sec-edgar","filing":"0001104659-25-100173","document":"tm2528899-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925100173/tm2528899-1_4seq1.xml","form_type":"4"}},{"id":1017421,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class B Common Stock","published_at":"2025-10-17T01:01:01.000Z","date":"2025-10-14","kind":"other","planned":false,"acquired":false,"shares":4000000,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"For each Class A Unit of Net Power Operations LLC, NPEH owns a corresponding share of Class B Common Stock of the Issuer. Upon the exchange of 4,000,000 Class A Units of Net Power Operations LLC, an equal number of shares of Class B Common Stock of the Issuer held by NPEH, which have no economic value, were cancelled."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Damian Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of these securities except to the extent of his or her pecuniary interest therein."}],"balance_after":22729880,"source":{"system":"sec-edgar","filing":"0001104659-25-100173","document":"tm2528899-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925100173/tm2528899-1_4seq1.xml","form_type":"4"}},{"id":1017420,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18959,"kind":"organization","name":"8 Rivers Capital, LLC","position":1,"cik":"0001981100","reported_name":"8 Rivers Capital, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18960,"kind":"person","name":"BEAUCHAMP DAMIAN R.","position":2,"cik":"0001973442","reported_name":"BEAUCHAMP DAMIAN R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73616,"kind":"person","name":"Beauchamp Cynda","position":3,"cik":"0002079418","reported_name":"Beauchamp Cynda","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-10-17T01:01:01.000Z","date":"2025-10-14","kind":"exercise","planned":false,"acquired":true,"shares":4000000,"ownership":{"direct":false,"nature":"By: NPEH, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On October 14, 2025, NPEH, LLC (\"NPEH\") exchanged 4,000,000 Class A Units of NET Power Operations LLC for 4,000,000 shares of the Issuer's Class A Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC (\"8 Rivers\") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Damian Beauchamp (\"Mr. Beauchamp\") and Cynda Beauchamp (\"Mrs. Beauchamp\") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of these securities except to the extent of his or her pecuniary interest therein."}],"balance_after":4000000,"source":{"system":"sec-edgar","filing":"0001104659-25-100173","document":"tm2528899-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925100173/tm2528899-1_4seq1.xml","form_type":"4"}}]}