{"transactions":[{"id":4637904,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":43725,"kind":"person","name":"Shuman Ned Leland","position":1,"cik":"0002137194","reported_name":"Shuman Ned Leland","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2026-10-08T20:30:19.000Z","date":"2026-04-13","kind":"grant","planned":false,"acquired":true,"shares":529801,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units granted on April 13, 2026 under the NET Power Inc. 2023 Omnibus Incentive Plan. Each restricted stock unit represents the right to receive one share of Class A common stock of the Issuer. The restricted stock units vest in full on April 13, 2029, subject to continued employment of the reporting person through that date and to accelerated vesting in certain circumstances."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The reporting person became Chief Financial Officer of the Issuer effective April 13, 2026. The restricted stock units reported on this Form 4 are the same units reported as a holding on the Form 3 filed by the reporting person on May 27, 2026, and are not in addition to them. Due to administrative oversight, this Form 4 is being filed late."}],"balance_after":529801,"source":{"system":"sec-edgar","filing":"0001104659-26-114715","document":"tm2627289-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2137194/000110465926114715/tm2627289-1_4seq1.xml","form_type":"4"}},{"id":4615090,"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}}],"security":"Class A Common Stock","published_at":"2026-09-10T22:01:14.000Z","date":"2026-09-09","kind":"sale","planned":false,"acquired":false,"shares":150000,"price":1.8405,"value":276075.0,"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 $1.77 to $1.885. 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":750000,"source":{"system":"sec-edgar","filing":"0001104659-26-106788","document":"tm2625212-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1981100/000110465926106788/tm2625212-2_4seq1.xml","form_type":"4"}},{"id":4615089,"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}}],"security":"Class A Common Stock","published_at":"2026-09-10T22:01:14.000Z","date":"2026-09-08","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":1.9352,"value":193520.0,"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 $1.87 to $2.00. 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":900000,"source":{"system":"sec-edgar","filing":"0001104659-26-106788","document":"tm2625212-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1981100/000110465926106788/tm2625212-2_4seq1.xml","form_type":"4"}},{"id":4615085,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-09-10T22:00:13.000Z","date":"2026-09-09","kind":"sale","planned":false,"acquired":false,"shares":150000,"price":1.8405,"value":276075.0,"ownership":{"direct":true},"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 $1.77 to $1.885. 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":750000,"source":{"system":"sec-edgar","filing":"0001104659-26-106786","document":"tm2625212-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1981772/000110465926106786/tm2625212-1_4seq1.xml","form_type":"4"}},{"id":4615084,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-09-10T22:00:13.000Z","date":"2026-09-08","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":1.9352,"value":193520.0,"ownership":{"direct":true},"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 $1.87 to $2.00. 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."}],"balance_after":900000,"source":{"system":"sec-edgar","filing":"0001104659-26-106786","document":"tm2625212-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1981772/000110465926106786/tm2625212-1_4seq1.xml","form_type":"4"}},{"id":671849,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18324,"kind":"person","name":"Veltmann Alejandra","position":1,"cik":"0001564633","reported_name":"Veltmann Alejandra","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-08-31T11:34:32.000Z","date":"2026-06-03","kind":"grant","planned":false,"acquired":true,"shares":71770,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The restricted stock units reported in this Form 4 were granted effective June 3, 2026, the date of the Issuer's 2026 annual meeting of stockholders, pursuant to the Issuer's Non-Employee Director Compensation Policy, which provides, among other things, for an automatic annual grant of restricted stock units to eligible non-employee directors. Each restricted stock unit represents the right to receive one share of Class A common stock. The restricted stock units vest on the earlier of the day immediately preceding the date of the Issuer's 2027 annual meeting of stockholders and June 3, 2027, subject to continued service as a director. Settlement of the restricted stock units is deferred pursuant to the reporting person's standing deferral election. Due to administrative oversight, this Form 4 is being filed late."}],"balance_after":176151,"source":{"system":"sec-edgar","filing":"0001564633-26-000002","document":"wk-form4_1788176069.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1564633/000156463326000002/wk-form4_1788176069.xml","form_type":"4"}},{"id":671800,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18299,"kind":"person","name":"PETERSON CAROL R.","position":1,"cik":"0001973456","reported_name":"PETERSON CAROL R.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-08-31T11:34:10.000Z","date":"2026-06-03","kind":"grant","planned":false,"acquired":true,"shares":71770,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The restricted stock units reported in this Form 4 were granted effective June 3, 2026, the date of the Issuer's 2026 annual meeting of stockholders, pursuant to the Issuer's Non-Employee Director Compensation Policy, which provides, among other things, for an automatic annual grant of restricted stock units to eligible non-employee directors. Each restricted stock unit represents the right to receive one share of Class A common stock. The restricted stock units vest on the earlier of the day immediately preceding the date of the Issuer's 2027 annual meeting of stockholders and June 3, 2027, subject to continued service as a director. Settlement of the restricted stock units is deferred pursuant to the reporting person's standing deferral election. Due to administrative oversight, this Form 4 is being filed late."}],"balance_after":176151,"source":{"system":"sec-edgar","filing":"0001973456-26-000007","document":"wk-form4_1788176048.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000197345626000007/wk-form4_1788176048.xml","form_type":"4"}},{"id":671954,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":15866,"kind":"person","name":"Kelliher Joseph T","position":1,"cik":"0001464551","reported_name":"Kelliher Joseph T","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-08-31T11:33:46.000Z","date":"2026-06-03","kind":"grant","planned":false,"acquired":true,"shares":71770,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The restricted stock units reported in this Form 4 were granted effective June 3, 2026, the date of the Issuer's 2026 annual meeting of stockholders, pursuant to the Issuer's Non-Employee Director Compensation Policy, which provides, among other things, for an automatic annual grant of restricted stock units to eligible non-employee directors. Each restricted stock unit represents the right to receive one share of Class A common stock. The restricted stock units vest on the earlier of the day immediately preceding the date of the Issuer's 2027 annual meeting of stockholders and June 3, 2027, subject to continued service as a director. Settlement of the restricted stock units is deferred pursuant to the reporting person's standing deferral election. Due to administrative oversight, this Form 4 is being filed late."}],"balance_after":176151,"source":{"system":"sec-edgar","filing":"0001464551-26-000006","document":"wk-form4_1788176023.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1464551/000146455126000006/wk-form4_1788176023.xml","form_type":"4"}},{"id":671895,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18357,"kind":"person","name":"Alexander Ralph","position":1,"cik":"0001358507","reported_name":"Alexander Ralph","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-08-31T11:33:27.000Z","date":"2026-06-03","kind":"grant","planned":false,"acquired":true,"shares":71770,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The restricted stock units reported in this Form 4 were granted effective June 3, 2026, the date of the Issuer's 2026 annual meeting of stockholders, pursuant to the Issuer's Non-Employee Director Compensation Policy, which provides, among other things, for an automatic annual grant of restricted stock units to eligible non-employee directors. Each restricted stock unit represents the right to receive one share of Class A common stock. The restricted stock units vest on the earlier of the day immediately preceding the date of the Issuer's 2027 annual meeting of stockholders and June 3, 2027, subject to continued service as a director. Settlement of the restricted stock units is deferred pursuant to the reporting person's standing deferral election. Due to administrative oversight, this Form 4 is being filed late."}],"balance_after":176151,"source":{"system":"sec-edgar","filing":"0001358507-26-000003","document":"wk-form4_1788176004.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1358507/000135850726000003/wk-form4_1788176004.xml","form_type":"4"}},{"id":673478,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-08-27T22:02:36.000Z","date":"2026-08-26","kind":"sale","planned":false,"acquired":false,"shares":41350,"price":1.9124,"value":79077.74,"ownership":{"direct":true},"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 $1.82 to $1.985. 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":1000000,"source":{"system":"sec-edgar","filing":"0001104659-26-102534","document":"tm2624229-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926102534/tm2624229-2_4seq1.xml","form_type":"4"}},{"id":673477,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-08-27T22:02:36.000Z","date":"2026-08-25","kind":"sale","planned":false,"acquired":false,"shares":201550,"price":1.9065,"value":384255.075,"ownership":{"direct":true},"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 $1.84 to $2.0091. 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."}],"balance_after":1041350,"source":{"system":"sec-edgar","filing":"0001104659-26-102534","document":"tm2624229-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926102534/tm2624229-2_4seq1.xml","form_type":"4"}},{"id":673475,"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}}],"security":"Class A Common Stock","published_at":"2026-08-27T22:00:13.000Z","date":"2026-08-26","kind":"sale","planned":false,"acquired":false,"shares":41350,"price":1.9124,"value":79077.74,"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 $1.82 to $1.985. 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1000000,"source":{"system":"sec-edgar","filing":"0001104659-26-102532","document":"tm2624229-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926102532/tm2624229-1_4seq1.xml","form_type":"4"}},{"id":673474,"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}}],"security":"Class A Common Stock","published_at":"2026-08-27T22:00:13.000Z","date":"2026-08-25","kind":"sale","planned":false,"acquired":false,"shares":201550,"price":1.9065,"value":384255.075,"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 $1.84 to $2.0091. 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1041350,"source":{"system":"sec-edgar","filing":"0001104659-26-102532","document":"tm2624229-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926102532/tm2624229-1_4seq1.xml","form_type":"4"}},{"id":686406,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-08-14T22:01:35.000Z","date":"2026-08-14","kind":"sale","planned":false,"acquired":false,"shares":507100,"price":1.9533,"value":990518.43,"ownership":{"direct":true},"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 $1.85 to $2.06. 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":1242900,"source":{"system":"sec-edgar","filing":"0001104659-26-097370","document":"tm2623246-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926097370/tm2623246-2_4seq1.xml","form_type":"4"}},{"id":686405,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-08-14T22:01:35.000Z","date":"2026-08-13","kind":"sale","planned":false,"acquired":false,"shares":200000,"price":1.6192,"value":323840.0,"ownership":{"direct":true},"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 $1.585 to $1.65. 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":1750000,"source":{"system":"sec-edgar","filing":"0001104659-26-097370","document":"tm2623246-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926097370/tm2623246-2_4seq1.xml","form_type":"4"}},{"id":686404,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-08-14T22:01:35.000Z","date":"2026-08-12","kind":"sale","planned":false,"acquired":false,"shares":50000,"price":1.6315,"value":81575.0,"ownership":{"direct":true},"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 $1.62 to $1.665. 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."}],"balance_after":1950000,"source":{"system":"sec-edgar","filing":"0001104659-26-097370","document":"tm2623246-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926097370/tm2623246-2_4seq1.xml","form_type":"4"}},{"id":686409,"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}}],"security":"Class A Common Stock","published_at":"2026-08-14T22:00:09.000Z","date":"2026-08-14","kind":"sale","planned":false,"acquired":false,"shares":507100,"price":1.9533,"value":990518.43,"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 $1.85 to $2.06. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1242900,"source":{"system":"sec-edgar","filing":"0001104659-26-097369","document":"tm2623246-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926097369/tm2623246-1_4seq1.xml","form_type":"4"}},{"id":686408,"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}}],"security":"Class A Common Stock","published_at":"2026-08-14T22:00:09.000Z","date":"2026-08-13","kind":"sale","planned":false,"acquired":false,"shares":200000,"price":1.6192,"value":323840.0,"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 $1.585 to $1.65. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1750000,"source":{"system":"sec-edgar","filing":"0001104659-26-097369","document":"tm2623246-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926097369/tm2623246-1_4seq1.xml","form_type":"4"}},{"id":686407,"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}}],"security":"Class A Common Stock","published_at":"2026-08-14T22:00:09.000Z","date":"2026-08-12","kind":"sale","planned":false,"acquired":false,"shares":50000,"price":1.6315,"value":81575.0,"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 $1.62 to $1.665. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1950000,"source":{"system":"sec-edgar","filing":"0001104659-26-097369","document":"tm2623246-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926097369/tm2623246-1_4seq1.xml","form_type":"4"}},{"id":690230,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-08-11T22:00:31.000Z","date":"2026-08-11","kind":"sale","planned":false,"acquired":false,"shares":35000,"price":1.5997,"value":55989.5,"ownership":{"direct":true},"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 $1.54 to $1.625. 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":2000000,"source":{"system":"sec-edgar","filing":"0001104659-26-094207","document":"tm2622855-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926094207/tm2622855-2_4seq1.xml","form_type":"4"}},{"id":690229,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-08-11T22:00:31.000Z","date":"2026-08-10","kind":"sale","planned":false,"acquired":false,"shares":55400,"price":1.5537,"value":86074.98,"ownership":{"direct":true},"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 $1.525 to $1.57. 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":2035000,"source":{"system":"sec-edgar","filing":"0001104659-26-094207","document":"tm2622855-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926094207/tm2622855-2_4seq1.xml","form_type":"4"}},{"id":690228,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-08-11T22:00:31.000Z","date":"2026-08-07","kind":"sale","planned":false,"acquired":false,"shares":60345,"price":1.5259,"value":92080.4355,"ownership":{"direct":true},"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 $1.50 to $1.55. 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."}],"balance_after":2090400,"source":{"system":"sec-edgar","filing":"0001104659-26-094207","document":"tm2622855-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926094207/tm2622855-2_4seq1.xml","form_type":"4"}},{"id":690227,"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}}],"security":"Class A Common Stock","published_at":"2026-08-11T22:00:10.000Z","date":"2026-08-11","kind":"sale","planned":false,"acquired":false,"shares":35000,"price":1.5997,"value":55989.5,"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 $1.54 to $1.625. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2000000,"source":{"system":"sec-edgar","filing":"0001104659-26-094206","document":"tm2622855-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926094206/tm2622855-1_4seq1.xml","form_type":"4"}},{"id":690226,"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}}],"security":"Class A Common Stock","published_at":"2026-08-11T22:00:10.000Z","date":"2026-08-10","kind":"sale","planned":false,"acquired":false,"shares":55400,"price":1.5537,"value":86074.98,"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 $1.525 to $1.57. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2035000,"source":{"system":"sec-edgar","filing":"0001104659-26-094206","document":"tm2622855-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926094206/tm2622855-1_4seq1.xml","form_type":"4"}},{"id":690225,"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}}],"security":"Class A Common Stock","published_at":"2026-08-11T22:00:10.000Z","date":"2026-08-07","kind":"sale","planned":false,"acquired":false,"shares":60345,"price":1.5259,"value":92080.4355,"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 $1.50 to $1.55. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2090400,"source":{"system":"sec-edgar","filing":"0001104659-26-094206","document":"tm2622855-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926094206/tm2622855-1_4seq1.xml","form_type":"4"}},{"id":693823,"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}}],"security":"Class A Common Stock","published_at":"2026-08-06T22:02:07.000Z","date":"2026-08-06","kind":"sale","planned":false,"acquired":false,"shares":89255,"price":1.5062,"value":134435.881,"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 $1.50 to $1.52. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2150745,"source":{"system":"sec-edgar","filing":"0001104659-26-092165","document":"tm2622440-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926092165/tm2622440-2_4seq1.xml","form_type":"4"}},{"id":693822,"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}}],"security":"Class A Common Stock","published_at":"2026-08-06T22:02:07.000Z","date":"2026-08-05","kind":"sale","planned":false,"acquired":false,"shares":140000,"price":1.5104,"value":211456.0,"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 $1.50 to $1.55. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2240000,"source":{"system":"sec-edgar","filing":"0001104659-26-092165","document":"tm2622440-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926092165/tm2622440-2_4seq1.xml","form_type":"4"}},{"id":693821,"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}}],"security":"Class A Common Stock","published_at":"2026-08-06T22:02:07.000Z","date":"2026-08-04","kind":"sale","planned":false,"acquired":false,"shares":120000,"price":1.5394,"value":184728.0,"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 $1.50 to $1.55. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2380000,"source":{"system":"sec-edgar","filing":"0001104659-26-092165","document":"tm2622440-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926092165/tm2622440-2_4seq1.xml","form_type":"4"}},{"id":693826,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-08-06T22:01:11.000Z","date":"2026-08-06","kind":"sale","planned":false,"acquired":false,"shares":89255,"price":1.5062,"value":134435.881,"ownership":{"direct":true},"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 $1.50 to $1.52. 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":2150745,"source":{"system":"sec-edgar","filing":"0001104659-26-092163","document":"tm2622440-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926092163/tm2622440-1_4seq1.xml","form_type":"4"}},{"id":693825,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-08-06T22:01:11.000Z","date":"2026-08-05","kind":"sale","planned":false,"acquired":false,"shares":140000,"price":1.5104,"value":211456.0,"ownership":{"direct":true},"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 $1.50 to $1.55. 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":2240000,"source":{"system":"sec-edgar","filing":"0001104659-26-092163","document":"tm2622440-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926092163/tm2622440-1_4seq1.xml","form_type":"4"}},{"id":693824,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-08-06T22:01:11.000Z","date":"2026-08-04","kind":"sale","planned":false,"acquired":false,"shares":120000,"price":1.5394,"value":184728.0,"ownership":{"direct":true},"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 $1.50 to $1.55. 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."}],"balance_after":2380000,"source":{"system":"sec-edgar","filing":"0001104659-26-092163","document":"tm2622440-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926092163/tm2622440-1_4seq1.xml","form_type":"4"}},{"id":700451,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-07-30T22:00:57.000Z","date":"2026-07-30","kind":"sale","planned":false,"acquired":false,"shares":155000,"price":1.4284,"value":221402.0,"ownership":{"direct":true},"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 $1.40 to $1.47. 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":2500000,"source":{"system":"sec-edgar","filing":"0001104659-26-088828","document":"tm2621696-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926088828/tm2621696-2_4seq1.xml","form_type":"4"}},{"id":700450,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-07-30T22:00:57.000Z","date":"2026-07-29","kind":"sale","planned":false,"acquired":false,"shares":45000,"price":1.4073,"value":63328.5,"ownership":{"direct":true},"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 $1.40 to $1.41. 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":2655000,"source":{"system":"sec-edgar","filing":"0001104659-26-088828","document":"tm2621696-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926088828/tm2621696-2_4seq1.xml","form_type":"4"}},{"id":700449,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-07-30T22:00:57.000Z","date":"2026-07-28","kind":"sale","planned":false,"acquired":false,"shares":55858,"price":1.4721,"value":82228.5618,"ownership":{"direct":true},"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 $1.415 to $1.495. 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."}],"balance_after":2700000,"source":{"system":"sec-edgar","filing":"0001104659-26-088828","document":"tm2621696-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926088828/tm2621696-2_4seq1.xml","form_type":"4"}},{"id":700448,"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}}],"security":"Class A Common Stock","published_at":"2026-07-30T22:00:16.000Z","date":"2026-07-30","kind":"sale","planned":false,"acquired":false,"shares":155000,"price":1.4284,"value":221402.0,"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 $1.40 to $1.47. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2500000,"source":{"system":"sec-edgar","filing":"0001104659-26-088827","document":"tm2621696-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926088827/tm2621696-1_4seq1.xml","form_type":"4"}},{"id":700447,"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}}],"security":"Class A Common Stock","published_at":"2026-07-30T22:00:16.000Z","date":"2026-07-29","kind":"sale","planned":false,"acquired":false,"shares":45000,"price":1.4073,"value":63328.5,"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 $1.40 to $1.41. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2655000,"source":{"system":"sec-edgar","filing":"0001104659-26-088827","document":"tm2621696-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926088827/tm2621696-1_4seq1.xml","form_type":"4"}},{"id":700446,"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}}],"security":"Class A Common Stock","published_at":"2026-07-30T22:00:16.000Z","date":"2026-07-28","kind":"sale","planned":false,"acquired":false,"shares":55858,"price":1.4721,"value":82228.5618,"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 $1.415 to $1.495. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2700000,"source":{"system":"sec-edgar","filing":"0001104659-26-088827","document":"tm2621696-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926088827/tm2621696-1_4seq1.xml","form_type":"4"}},{"id":703878,"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}}],"security":"Class A Common Stock","published_at":"2026-07-23T23:40:22.000Z","date":"2026-07-23","kind":"sale","planned":false,"acquired":false,"shares":39142,"price":1.5066,"value":58971.3372,"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 $1.50 to $1.52. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2755858,"source":{"system":"sec-edgar","filing":"0001104659-26-086400","document":"tm2621201-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926086400/tm2621201-2_4seq1.xml","form_type":"4"}},{"id":703877,"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}}],"security":"Class A Common Stock","published_at":"2026-07-23T23:40:22.000Z","date":"2026-07-22","kind":"sale","planned":false,"acquired":false,"shares":90000,"price":1.5258,"value":137322.0,"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 $1.50 to $1.56. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2795000,"source":{"system":"sec-edgar","filing":"0001104659-26-086400","document":"tm2621201-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926086400/tm2621201-2_4seq1.xml","form_type":"4"}},{"id":703876,"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}}],"security":"Class A Common Stock","published_at":"2026-07-23T23:40:22.000Z","date":"2026-07-21","kind":"sale","planned":false,"acquired":false,"shares":80000,"price":1.53,"value":122400.0,"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 $1.50 to $1.555. 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 90.9% 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\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2885000,"source":{"system":"sec-edgar","filing":"0001104659-26-086400","document":"tm2621201-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926086400/tm2621201-2_4seq1.xml","form_type":"4"}},{"id":703874,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-07-23T23:37:52.000Z","date":"2026-07-23","kind":"sale","planned":false,"acquired":false,"shares":39142,"price":1.5066,"value":58971.3372,"ownership":{"direct":true},"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 $1.50 to $1.52. 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":2755858,"source":{"system":"sec-edgar","filing":"0001104659-26-086399","document":"tm2621201-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926086399/tm2621201-1_4seq1.xml","form_type":"4"}},{"id":703873,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-07-23T23:37:52.000Z","date":"2026-07-22","kind":"sale","planned":false,"acquired":false,"shares":90000,"price":1.5258,"value":137322.0,"ownership":{"direct":true},"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 $1.50 to $1.56. 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":2795000,"source":{"system":"sec-edgar","filing":"0001104659-26-086399","document":"tm2621201-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926086399/tm2621201-1_4seq1.xml","form_type":"4"}},{"id":703872,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-07-23T23:37:52.000Z","date":"2026-07-21","kind":"sale","planned":false,"acquired":false,"shares":80000,"price":1.53,"value":122400.0,"ownership":{"direct":true},"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 $1.50 to $1.555. 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."}],"balance_after":2885000,"source":{"system":"sec-edgar","filing":"0001104659-26-086399","document":"tm2621201-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926086399/tm2621201-1_4seq1.xml","form_type":"4"}},{"id":778551,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-05-14T22:00:58.000Z","date":"2026-05-13","kind":"sale","planned":false,"acquired":false,"shares":35000,"price":2.4329,"value":85151.5,"ownership":{"direct":true},"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 $2.405 to $2.46. 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."}],"balance_after":2965000,"source":{"system":"sec-edgar","filing":"0001104659-26-061387","document":"tm2614586-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926061387/tm2614586-2_4seq1.xml","form_type":"4"}},{"id":778550,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-05-14T22:00:58.000Z","date":"2026-05-12","kind":"sale","planned":false,"acquired":false,"shares":400000,"price":2.4389,"value":975560.0,"ownership":{"direct":true},"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 $2.35 to $2.51. 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."}],"balance_after":3000000,"source":{"system":"sec-edgar","filing":"0001104659-26-061387","document":"tm2614586-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926061387/tm2614586-2_4seq1.xml","form_type":"4"}},{"id":778549,"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}}],"security":"Class A Common Stock","published_at":"2026-05-14T22:00:17.000Z","date":"2026-05-13","kind":"sale","planned":false,"acquired":false,"shares":35000,"price":2.4329,"value":85151.5,"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 $2.405 to $2.46. 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2965000,"source":{"system":"sec-edgar","filing":"0001104659-26-061386","document":"tm2614586-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926061386/tm2614586-1_4seq1.xml","form_type":"4"}},{"id":778548,"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}}],"security":"Class A Common Stock","published_at":"2026-05-14T22:00:17.000Z","date":"2026-05-12","kind":"sale","planned":false,"acquired":false,"shares":400000,"price":2.4389,"value":975560.0,"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 $2.35 to $2.51. 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":3000000,"source":{"system":"sec-edgar","filing":"0001104659-26-061386","document":"tm2614586-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926061386/tm2614586-1_4seq1.xml","form_type":"4"}},{"id":780270,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Units of NET Power Operations LLC","published_at":"2026-05-13T20:23:25.000Z","date":"2026-03-06","kind":"exercise","planned":false,"acquired":false,"shares":3000000,"ownership":{"direct":true},"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the \"Original Form 4\") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II."},{"field":"date","element":"transactionDate","label":"F3","text":"This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the \"Original Form 4\") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II."},{"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the \"Original Form 4\") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II."},{"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the \"Original Form 4\") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II."},{"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the \"Original Form 4\") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II."}],"balance_after":17729880,"derivative":{"underlying":"Class A Common Stock","underlying_shares":3000000},"source":{"system":"sec-edgar","filing":"0001104659-26-060274","document":"tm2614507-2_4aseq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926060274/tm2614507-2_4aseq1.xml","form_type":"4/A","original_submission_date":"2026-03-10"}},{"id":780269,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class B Common Stock","published_at":"2026-05-13T20:23:25.000Z","date":"2026-03-06","kind":"other","planned":false,"acquired":false,"shares":3000000,"ownership":{"direct":true},"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 3,000,000 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."}],"balance_after":17729880,"source":{"system":"sec-edgar","filing":"0001104659-26-060274","document":"tm2614507-2_4aseq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926060274/tm2614507-2_4aseq1.xml","form_type":"4/A","original_submission_date":"2026-03-10"}},{"id":780268,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-05-13T20:23:25.000Z","date":"2026-03-06","kind":"exercise","planned":false,"acquired":true,"shares":3000000,"ownership":{"direct":true},"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."}],"balance_after":3400000,"source":{"system":"sec-edgar","filing":"0001104659-26-060274","document":"tm2614507-2_4aseq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926060274/tm2614507-2_4aseq1.xml","form_type":"4/A","original_submission_date":"2026-03-10"}},{"id":780267,"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}}],"security":"Class A Units of NET Power Operations LLC","published_at":"2026-05-13T20:22:18.000Z","date":"2026-03-06","kind":"exercise","planned":false,"acquired":false,"shares":3000000,"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the \"Original Form 4\") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II."},{"field":"date","element":"transactionDate","label":"F5","text":"This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the \"Original Form 4\") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II."},{"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the \"Original Form 4\") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II."},{"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the \"Original Form 4\") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II."},{"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the \"Original Form 4\") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":17729880,"derivative":{"underlying":"Class A Common Stock","underlying_shares":3000000},"source":{"system":"sec-edgar","filing":"0001104659-26-060272","document":"tm2614507-1_4aseq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926060272/tm2614507-1_4aseq1.xml","form_type":"4/A","original_submission_date":"2026-03-10"}},{"id":780266,"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}}],"security":"Class B Common Stock","published_at":"2026-05-13T20:22:18.000Z","date":"2026-03-06","kind":"other","planned":false,"acquired":false,"shares":3000000,"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 3,000,000 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":17729880,"source":{"system":"sec-edgar","filing":"0001104659-26-060272","document":"tm2614507-1_4aseq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926060272/tm2614507-1_4aseq1.xml","form_type":"4/A","original_submission_date":"2026-03-10"}},{"id":780265,"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}}],"security":"Class A Common Stock","published_at":"2026-05-13T20:22:18.000Z","date":"2026-03-06","kind":"exercise","planned":false,"acquired":true,"shares":3000000,"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":3400000,"source":{"system":"sec-edgar","filing":"0001104659-26-060272","document":"tm2614507-1_4aseq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926060272/tm2614507-1_4aseq1.xml","form_type":"4/A","original_submission_date":"2026-03-10"}},{"id":850104,"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}}],"security":"Class B Common Stock","published_at":"2026-03-10T22:02:02.000Z","date":"2026-03-06","kind":"other","planned":false,"acquired":false,"shares":3000000,"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 3,000,000 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":17729880,"source":{"system":"sec-edgar","filing":"0001104659-26-025970","document":"tm268392-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926025970/tm268392-2_4seq1.xml","form_type":"4"}},{"id":850103,"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}}],"security":"Class A Common Stock","published_at":"2026-03-10T22:02:02.000Z","date":"2026-03-06","kind":"exercise","planned":false,"acquired":true,"shares":3000000,"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":3400000,"source":{"system":"sec-edgar","filing":"0001104659-26-025970","document":"tm268392-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926025970/tm268392-2_4seq1.xml","form_type":"4"}},{"id":850102,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class B Common Stock","published_at":"2026-03-10T22:01:11.000Z","date":"2026-03-06","kind":"other","planned":false,"acquired":false,"shares":3000000,"ownership":{"direct":true},"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 3,000,000 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."}],"balance_after":17729880,"source":{"system":"sec-edgar","filing":"0001104659-26-025969","document":"tm268392-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926025969/tm268392-1_4seq1.xml","form_type":"4"}},{"id":850101,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-03-10T22:01:11.000Z","date":"2026-03-06","kind":"exercise","planned":false,"acquired":true,"shares":3000000,"ownership":{"direct":true},"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 March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock."}],"balance_after":3400000,"source":{"system":"sec-edgar","filing":"0001104659-26-025969","document":"tm268392-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926025969/tm268392-1_4seq1.xml","form_type":"4"}},{"id":857663,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-03-05T23:16:18.000Z","date":"2026-03-03","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":2.0425,"value":204250.0,"ownership":{"direct":true},"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 $2.01 to $2.015 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."}],"balance_after":400000,"source":{"system":"sec-edgar","filing":"0001104659-26-024242","document":"tm268112-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926024242/tm268112-2_4seq1.xml","form_type":"4"}},{"id":857662,"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}}],"security":"Class A Common Stock","published_at":"2026-03-05T23:15:41.000Z","date":"2026-03-03","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":2.0425,"value":204250.0,"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 $2.01 to $2.015. 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":"As manager and holder of approximately 90.9% 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":"F3","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":400000,"source":{"system":"sec-edgar","filing":"0001104659-26-024241","document":"tm268112-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926024241/tm268112-1_4seq1.xml","form_type":"4"}},{"id":873334,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-03-02T23:01:50.000Z","date":"2026-03-02","kind":"sale","planned":false,"acquired":false,"shares":79858,"price":2.0508,"value":163772.7864,"ownership":{"direct":true},"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 $2.00 to $2.10. 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":500000,"source":{"system":"sec-edgar","filing":"0001104659-26-022378","document":"tm267758-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926022378/tm267758-2_4seq1.xml","form_type":"4"}},{"id":873333,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-03-02T23:01:50.000Z","date":"2026-02-27","kind":"sale","planned":false,"acquired":false,"shares":4744,"price":2.0003,"value":9489.4232,"ownership":{"direct":true},"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 $2.00 to $2.005. 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":579858,"source":{"system":"sec-edgar","filing":"0001104659-26-022378","document":"tm267758-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926022378/tm267758-2_4seq1.xml","form_type":"4"}},{"id":873332,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-03-02T23:01:50.000Z","date":"2026-02-26","kind":"sale","planned":false,"acquired":false,"shares":1881,"price":2,"value":3762.0,"ownership":{"direct":true},"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 a price of $2.00. 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."}],"balance_after":584602,"source":{"system":"sec-edgar","filing":"0001104659-26-022378","document":"tm267758-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926022378/tm267758-2_4seq1.xml","form_type":"4"}},{"id":873331,"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}}],"security":"Class A Common Stock","published_at":"2026-03-02T23:00:34.000Z","date":"2026-03-02","kind":"sale","planned":false,"acquired":false,"shares":79858,"price":2.0508,"value":163772.7864,"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 $2.00 to $2.10. 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 90.9% 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\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":500000,"source":{"system":"sec-edgar","filing":"0001104659-26-022377","document":"tm267758-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926022377/tm267758-1_4seq1.xml","form_type":"4"}},{"id":873330,"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}}],"security":"Class A Common Stock","published_at":"2026-03-02T23:00:34.000Z","date":"2026-02-27","kind":"sale","planned":false,"acquired":false,"shares":4744,"price":2.0003,"value":9489.4232,"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 $2.00 to $2.005. 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 90.9% 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\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":579858,"source":{"system":"sec-edgar","filing":"0001104659-26-022377","document":"tm267758-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926022377/tm267758-1_4seq1.xml","form_type":"4"}},{"id":873329,"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}}],"security":"Class A Common Stock","published_at":"2026-03-02T23:00:34.000Z","date":"2026-02-26","kind":"sale","planned":false,"acquired":false,"shares":1881,"price":2,"value":3762.0,"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 a price of $2.00. 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 90.9% 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\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":584602,"source":{"system":"sec-edgar","filing":"0001104659-26-022377","document":"tm267758-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926022377/tm267758-1_4seq1.xml","form_type":"4"}},{"id":887416,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-02-23T23:01:10.000Z","date":"2026-02-20","kind":"sale","planned":false,"acquired":false,"shares":63517,"price":2.0346,"value":129231.6882,"ownership":{"direct":true},"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 $2.00 to $2.1175. 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":586483,"source":{"system":"sec-edgar","filing":"0001104659-26-018703","document":"tm267082-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926018703/tm267082-2_4seq1.xml","form_type":"4"}},{"id":887415,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-02-23T23:01:10.000Z","date":"2026-02-19","kind":"sale","planned":false,"acquired":false,"shares":125000,"price":2.1411,"value":267637.5,"ownership":{"direct":true},"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 $2.10 to $2.17. 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."}],"balance_after":650000,"source":{"system":"sec-edgar","filing":"0001104659-26-018703","document":"tm267082-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926018703/tm267082-2_4seq1.xml","form_type":"4"}},{"id":887414,"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}}],"security":"Class A Common Stock","published_at":"2026-02-23T23:00:25.000Z","date":"2026-02-20","kind":"sale","planned":false,"acquired":false,"shares":63517,"price":2.0346,"value":129231.6882,"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 $2.00 to $2.1175. 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":586483,"source":{"system":"sec-edgar","filing":"0001104659-26-018702","document":"tm267082-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926018702/tm267082-1_4seq1.xml","form_type":"4"}},{"id":887413,"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}}],"security":"Class A Common Stock","published_at":"2026-02-23T23:00:25.000Z","date":"2026-02-19","kind":"sale","planned":false,"acquired":false,"shares":125000,"price":2.1411,"value":267637.5,"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 $2.10 to $2.17. 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":650000,"source":{"system":"sec-edgar","filing":"0001104659-26-018702","document":"tm267082-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926018702/tm267082-1_4seq1.xml","form_type":"4"}},{"id":895493,"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}}],"security":"Class A Common Stock","published_at":"2026-02-18T23:44:52.000Z","date":"2026-02-18","kind":"sale","planned":false,"acquired":false,"shares":75000,"price":2.0692,"value":155190.0,"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 $2.045 to $2.115. 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":775000,"source":{"system":"sec-edgar","filing":"0001104659-26-017183","document":"tm266743-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926017183/tm266743-2_4seq1.xml","form_type":"4"}},{"id":895492,"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}}],"security":"Class A Common Stock","published_at":"2026-02-18T23:44:52.000Z","date":"2026-02-13","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":2.1414,"value":214140.0,"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 $2.10 to $2.215. 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":"F3","text":"As manager and holder of approximately 90.9% 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":"F4","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":850000,"source":{"system":"sec-edgar","filing":"0001104659-26-017183","document":"tm266743-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926017183/tm266743-2_4seq1.xml","form_type":"4"}},{"id":895491,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-02-18T23:43:37.000Z","date":"2026-02-18","kind":"sale","planned":false,"acquired":false,"shares":75000,"price":2.0692,"value":155190.0,"ownership":{"direct":true},"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 $2.045 to $2.115. 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":775000,"source":{"system":"sec-edgar","filing":"0001104659-26-017182","document":"tm266743-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926017182/tm266743-1_4seq1.xml","form_type":"4"}},{"id":895490,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-02-18T23:43:37.000Z","date":"2026-02-13","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":2.1414,"value":214140.0,"ownership":{"direct":true},"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 $2.10 to $2.215. 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."}],"balance_after":850000,"source":{"system":"sec-edgar","filing":"0001104659-26-017182","document":"tm266743-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926017182/tm266743-1_4seq1.xml","form_type":"4"}},{"id":907042,"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}}],"security":"Class A Common Stock","published_at":"2026-02-12T23:25:08.000Z","date":"2026-02-12","kind":"sale","planned":false,"acquired":false,"shares":150000,"price":2.0307,"value":304605.0,"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 $2.00 to $2.07. 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 90.9% 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\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":950000,"source":{"system":"sec-edgar","filing":"0001104659-26-014480","document":"tm266219-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926014480/tm266219-2_4seq1.xml","form_type":"4"}},{"id":907041,"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}}],"security":"Class A Common Stock","published_at":"2026-02-12T23:25:08.000Z","date":"2026-02-11","kind":"sale","planned":false,"acquired":false,"shares":60000,"price":2.0225,"value":121350.0,"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 $2.00 to $2.05. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"As manager and holder of approximately 90.9% 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\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1100000,"source":{"system":"sec-edgar","filing":"0001104659-26-014480","document":"tm266219-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926014480/tm266219-2_4seq1.xml","form_type":"4"}},{"id":907040,"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}}],"security":"Class A Common Stock","published_at":"2026-02-12T23:25:08.000Z","date":"2026-02-10","kind":"sale","planned":false,"acquired":false,"shares":40000,"price":2.0803,"value":83212.0,"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 $2.03 to $2.115. 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 90.9% 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\") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1160000,"source":{"system":"sec-edgar","filing":"0001104659-26-014480","document":"tm266219-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926014480/tm266219-2_4seq1.xml","form_type":"4"}},{"id":907039,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-02-12T23:24:19.000Z","date":"2026-02-12","kind":"sale","planned":false,"acquired":false,"shares":150000,"price":2.0307,"value":304605.0,"ownership":{"direct":true},"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 $2.00 to $2.07. 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":950000,"source":{"system":"sec-edgar","filing":"0001104659-26-014477","document":"tm266219-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926014477/tm266219-1_4seq1.xml","form_type":"4"}},{"id":907038,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-02-12T23:24:19.000Z","date":"2026-02-11","kind":"sale","planned":false,"acquired":false,"shares":60000,"price":2.0225,"value":121350.0,"ownership":{"direct":true},"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 $2.00 to $2.05. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":1100000,"source":{"system":"sec-edgar","filing":"0001104659-26-014477","document":"tm266219-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926014477/tm266219-1_4seq1.xml","form_type":"4"}},{"id":907037,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-02-12T23:24:19.000Z","date":"2026-02-10","kind":"sale","planned":false,"acquired":false,"shares":40000,"price":2.0803,"value":83212.0,"ownership":{"direct":true},"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 $2.03 to $2.115. 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."}],"balance_after":1160000,"source":{"system":"sec-edgar","filing":"0001104659-26-014477","document":"tm266219-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926014477/tm266219-1_4seq1.xml","form_type":"4"}},{"id":924385,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-02-02T22:10:02.000Z","date":"2026-01-29","kind":"sale","planned":false,"acquired":false,"shares":54780,"price":2.3485,"value":128650.83,"ownership":{"direct":true},"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 $2.27 to $2.42. 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."}],"balance_after":1200000,"source":{"system":"sec-edgar","filing":"0001104659-26-009308","document":"tm264813-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926009308/tm264813-2_4seq1.xml","form_type":"4"}},{"id":924384,"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}}],"security":"Class A Common Stock","published_at":"2026-02-02T22:08:53.000Z","date":"2026-01-29","kind":"sale","planned":false,"acquired":false,"shares":54780,"price":2.3485,"value":128650.83,"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 $2.27 to $2.42. 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":"As manager and holder of approximately 90.9% 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":"F3","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 68.3% of 8 Rivers, and Mr. Beauchamp directly owns approximately 0.86% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1200000,"source":{"system":"sec-edgar","filing":"0001104659-26-009305","document":"tm264813-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926009305/tm264813-1_4seq1.xml","form_type":"4"}},{"id":928636,"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}}],"security":"Class A Common Stock","published_at":"2026-01-28T23:00:56.000Z","date":"2026-01-28","kind":"sale","planned":false,"acquired":false,"shares":65220,"price":2.383,"value":155419.26,"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 $2.35 to $2.42. 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 90.9% 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\") independently indirectly owns approximately 68.5% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1254780,"source":{"system":"sec-edgar","filing":"0001104659-26-007528","document":"tm264286-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926007528/tm264286-2_4seq1.xml","form_type":"4"}},{"id":928635,"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}}],"security":"Class A Common Stock","published_at":"2026-01-28T23:00:56.000Z","date":"2026-01-27","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":2.3837,"value":238370.0,"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 $2.35 to $2.41. 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 90.9% 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\") independently indirectly owns approximately 68.5% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1320000,"source":{"system":"sec-edgar","filing":"0001104659-26-007528","document":"tm264286-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926007528/tm264286-2_4seq1.xml","form_type":"4"}},{"id":928634,"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}}],"security":"Class A Common Stock","published_at":"2026-01-28T23:00:56.000Z","date":"2026-01-26","kind":"sale","planned":false,"acquired":false,"shares":130000,"price":2.3549,"value":306137.0,"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 $2.345 to $2.385. 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 90.9% 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\") independently indirectly owns approximately 68.5% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1420000,"source":{"system":"sec-edgar","filing":"0001104659-26-007528","document":"tm264286-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926007528/tm264286-2_4seq1.xml","form_type":"4"}},{"id":928633,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-01-28T23:00:13.000Z","date":"2026-01-28","kind":"sale","planned":false,"acquired":false,"shares":65220,"price":2.383,"value":155419.26,"ownership":{"direct":true},"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 $2.35 to $2.42. 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":1254780,"source":{"system":"sec-edgar","filing":"0001104659-26-007527","document":"tm264286-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926007527/tm264286-1_4seq1.xml","form_type":"4"}},{"id":928632,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-01-28T23:00:13.000Z","date":"2026-01-27","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":2.3837,"value":238370.0,"ownership":{"direct":true},"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 $2.35 to $2.41. 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":1320000,"source":{"system":"sec-edgar","filing":"0001104659-26-007527","document":"tm264286-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926007527/tm264286-1_4seq1.xml","form_type":"4"}},{"id":928631,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-01-28T23:00:13.000Z","date":"2026-01-26","kind":"sale","planned":false,"acquired":false,"shares":130000,"price":2.3549,"value":306137.0,"ownership":{"direct":true},"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 $2.345 to $2.385. 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."}],"balance_after":1420000,"source":{"system":"sec-edgar","filing":"0001104659-26-007527","document":"tm264286-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926007527/tm264286-1_4seq1.xml","form_type":"4"}},{"id":936679,"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}}],"security":"Class A Common Stock","published_at":"2026-01-17T00:20:31.000Z","date":"2026-01-16","kind":"sale","planned":false,"acquired":false,"shares":230000,"price":2.6325,"value":605475.0,"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 $2.535 to $2.705. 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 90.9% 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\") independently indirectly owns approximately 68.5% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1550000,"source":{"system":"sec-edgar","filing":"0001104659-26-004650","document":"tm263412-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926004650/tm263412-2_4seq1.xml","form_type":"4"}},{"id":936678,"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}}],"security":"Class A Common Stock","published_at":"2026-01-17T00:20:31.000Z","date":"2026-01-15","kind":"sale","planned":false,"acquired":false,"shares":135000,"price":2.5718,"value":347193.0,"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 $2.50 to $2.77. 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 90.9% 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\") independently indirectly owns approximately 68.5% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1780000,"source":{"system":"sec-edgar","filing":"0001104659-26-004650","document":"tm263412-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926004650/tm263412-2_4seq1.xml","form_type":"4"}},{"id":936677,"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}}],"security":"Class A Common Stock","published_at":"2026-01-17T00:20:31.000Z","date":"2026-01-14","kind":"sale","planned":false,"acquired":false,"shares":135000,"price":2.7379,"value":369616.5,"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 $2.725 to $2.755. 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 90.9% 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\") independently indirectly owns approximately 68.5% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":1915000,"source":{"system":"sec-edgar","filing":"0001104659-26-004650","document":"tm263412-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926004650/tm263412-2_4seq1.xml","form_type":"4"}},{"id":936676,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-01-17T00:17:54.000Z","date":"2026-01-16","kind":"sale","planned":false,"acquired":false,"shares":230000,"price":2.6325,"value":605475.0,"ownership":{"direct":true},"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 $2.535 to $2.705. 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":1550000,"source":{"system":"sec-edgar","filing":"0001104659-26-004647","document":"tm263412-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926004647/tm263412-1_4seq1.xml","form_type":"4"}},{"id":936675,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-01-17T00:17:54.000Z","date":"2026-01-15","kind":"sale","planned":false,"acquired":false,"shares":135000,"price":2.5718,"value":347193.0,"ownership":{"direct":true},"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 $2.50 to $2.77. 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":1780000,"source":{"system":"sec-edgar","filing":"0001104659-26-004647","document":"tm263412-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926004647/tm263412-1_4seq1.xml","form_type":"4"}},{"id":936674,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-01-17T00:17:54.000Z","date":"2026-01-14","kind":"sale","planned":false,"acquired":false,"shares":135000,"price":2.7379,"value":369616.5,"ownership":{"direct":true},"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 $2.725 to $2.755. 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."}],"balance_after":1915000,"source":{"system":"sec-edgar","filing":"0001104659-26-004647","document":"tm263412-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465926004647/tm263412-1_4seq1.xml","form_type":"4"}},{"id":957813,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-12-30T00:49:54.000Z","date":"2025-12-24","kind":"sale","planned":false,"acquired":false,"shares":170000,"price":2.2096,"value":375632.0,"ownership":{"direct":true},"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 $2.18 to $2.27. 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."}],"balance_after":2050000,"source":{"system":"sec-edgar","filing":"0001104659-25-124958","document":"tm2534477-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925124958/tm2534477-2_4seq1.xml","form_type":"4"}},{"id":957812,"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}}],"security":"Class A Common Stock","published_at":"2025-12-30T00:48:27.000Z","date":"2025-12-24","kind":"sale","planned":false,"acquired":false,"shares":170000,"price":2.2096,"value":375632.0,"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 $2.18 to $2.27. 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":"As manager and holder of approximately 90.9% 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":"F3","text":"Damian R. Beauchamp (\"Mr. Beauchamp\") independently indirectly owns approximately 68.5% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2050000,"source":{"system":"sec-edgar","filing":"0001104659-25-124957","document":"tm2534477-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925124957/tm2534477-1_4seq1.xml","form_type":"4"}},{"id":959202,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-12-23T22:19:31.000Z","date":"2025-12-23","kind":"sale","planned":false,"acquired":false,"shares":130000,"price":2.1666,"value":281658.0,"ownership":{"direct":true},"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 $2.13 to $2.235. 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":2220000,"source":{"system":"sec-edgar","filing":"0001104659-25-124304","document":"tm2534242-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925124304/tm2534242-2_4seq1.xml","form_type":"4"}},{"id":959201,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-12-23T22:19:31.000Z","date":"2025-12-22","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":2.2646,"value":226460.0,"ownership":{"direct":true},"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 $2.21 to $2.35. 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":2350000,"source":{"system":"sec-edgar","filing":"0001104659-25-124304","document":"tm2534242-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925124304/tm2534242-2_4seq1.xml","form_type":"4"}},{"id":959200,"issuer":{"id":6500,"kind":"organization","name":"Net Power Inc.","symbol":"NPWR"},"owners":[{"id":18963,"kind":"organization","name":"NPEH, LLC","position":1,"cik":"0001981772","reported_name":"NPEH, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-12-23T22:19:31.000Z","date":"2025-12-19","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":2.3431,"value":234310.0,"ownership":{"direct":true},"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 $2.305 to $2.425. 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."}],"balance_after":2450000,"source":{"system":"sec-edgar","filing":"0001104659-25-124304","document":"tm2534242-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925124304/tm2534242-2_4seq1.xml","form_type":"4"}},{"id":959199,"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}}],"security":"Class A Common Stock","published_at":"2025-12-23T22:18:28.000Z","date":"2025-12-23","kind":"sale","planned":false,"acquired":false,"shares":130000,"price":2.1666,"value":281658.0,"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 $2.13 to $2.235. 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 90.9% 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\") independently indirectly owns approximately 68.5% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2220000,"source":{"system":"sec-edgar","filing":"0001104659-25-124300","document":"tm2534242-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925124300/tm2534242-1_4seq1.xml","form_type":"4"}},{"id":959198,"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}}],"security":"Class A Common Stock","published_at":"2025-12-23T22:18:28.000Z","date":"2025-12-22","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":2.2646,"value":226460.0,"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 $2.21 to $2.35. 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 90.9% 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\") independently indirectly owns approximately 68.5% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims 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. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":2350000,"source":{"system":"sec-edgar","filing":"0001104659-25-124300","document":"tm2534242-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1845437/000110465925124300/tm2534242-1_4seq1.xml","form_type":"4"}}],"next_cursor":"2025-12-23T22:18:28.000000Z,959198"}