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8 Rivers Capital, LLC

Disclosed activity across 1 company

Tapewire entity
18959
SEC CIK
0001981100

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Net Power Inc.NPWR · Entity 650010% ownerSeptember 08, 2026September 10, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Net Power Inc.

Report date September 08, 2026 · Filed September 10, 2026

Jointly reported with BEAUCHAMP DAMIAN R.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Class A Common StockSEC Table I · non-derivativeIndirectBy: NPEH, LLC750,000 Last balance in matching sequence After 2026-09-09 transaction · row 2 Source-order balances reconcile. Account continuity and personal attribution are not independently verified.
2 source rows

Row 1 · 2026-09-08 · Sale · Disposed 100,000 · Balance 900,000

F1: 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.

F3: 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.

F4: 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.

Row 2 · 2026-09-09 · Sale · Disposed 150,000 · Balance 750,000

F2: 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.

F3: 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.

F4: 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.

Filing footnotes · ownership attribution and instrument terms

F1: 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.

F2: 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.

F3: 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.

F4: 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.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
December 05, 2025 Filed Dec 8, 2025 22:14 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 105,000 $2.91 $305,172.00
Disclosure

SEC source: 0001104659-25-119359 · tm2532961-1_4seq1.xml · nonDerivative · entry 2

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 2,730,000

F2 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $2.85 to $2.98. 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.

F4 · ownership.nature: 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.

F5 · ownership.nature: 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.

Read SEC document
December 04, 2025 Filed Dec 8, 2025 22:14 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 65,000 $2.94 $191,256.00
Disclosure

SEC source: 0001104659-25-119359 · tm2532961-1_4seq1.xml · nonDerivative · entry 1

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 2,835,000

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $2.885 to $3.00. 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.

F4 · ownership.nature: 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.

F5 · ownership.nature: 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.

Read SEC document
November 28, 2025 Filed Dec 2, 2025 22:22 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 200,000 $2.94 $587,080.00
Disclosure

SEC source: 0001104659-25-117793 · tm2532523-2_4seq1.xml · nonDerivative · entry 1

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 2,900,000

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $2.885 to $3.015. 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.

F2 · ownership.nature: 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.

F3 · ownership.nature: 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.

Read SEC document
November 21, 2025 Filed Nov 24, 2025 23:36 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 17,163 $2.50 $42,928.10
Disclosure

SEC source: 0001104659-25-115527 · tm2531990-1_4seq1.xml · nonDerivative · entry 2

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,100,000

F2 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $2.50 to $2.505. 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.

F3 · ownership.nature: 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.

F4 · ownership.nature: 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.

Read SEC document
November 20, 2025 Filed Nov 24, 2025 23:36 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 132,837 $2.60 $344,990.97
Disclosure

SEC source: 0001104659-25-115527 · tm2531990-1_4seq1.xml · nonDerivative · entry 1

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,117,163

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $2.50 to $2.7406. 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.

F3 · ownership.nature: 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.

F4 · ownership.nature: 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.

Read SEC document
November 19, 2025 Filed Nov 19, 2025 22:44 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 250,000 $2.57 $642,000.00
Disclosure

SEC source: 0001104659-25-114213 · tm2531645-1_4seq1.xml · nonDerivative · entry 2

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,250,000

F2 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $2.505 to $2.715. 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.

F3 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F4 · ownership.nature: 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.

Read SEC document
November 17, 2025 Filed Nov 19, 2025 22:44 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 338,653 $2.81 $951,479.47
Disclosure

SEC source: 0001104659-25-114213 · tm2531645-1_4seq1.xml · nonDerivative · entry 1

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,500,000

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $2.76 to $2.885. 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.

F3 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F4 · ownership.nature: 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.

Read SEC document
November 03, 2025 Filed Nov 5, 2025 02:17 UTC Net Power Inc. NPWR · Entity 6500 ConversionClass A Units of NET Power Operations LLC · Derivative 2,000,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-25-106553 · tm2530190-2_4seq1.xml · derivative · entry 5

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 20,729,880

Underlying: Class A Common Stock · 2,000,000 shares

Expires not disclosed

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

F3 · derivative.exercise_price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On November 03, 2025, NPEH exchanged 2,000,000 Class A Units of NET Power Operations LLC for 2,000,000 shares of the Issuer's Class A Common Stock.

F3 · price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On November 03, 2025, NPEH exchanged 2,000,000 Class A Units of NET Power Operations LLC for 2,000,000 shares of the Issuer's Class A Common Stock.

F3 · derivative.exercise_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On November 03, 2025, NPEH exchanged 2,000,000 Class A Units of NET Power Operations LLC for 2,000,000 shares of the Issuer's Class A Common Stock.

F3 · derivative.expiration_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On November 03, 2025, NPEH exchanged 2,000,000 Class A Units of NET Power Operations LLC for 2,000,000 shares of the Issuer's Class A Common Stock.

F5 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F6 · ownership.nature: 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 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.

Read SEC document
November 03, 2025 Filed Nov 5, 2025 02:17 UTC Net Power Inc. NPWR · Entity 6500 OtherClass B Common Stock 2,000,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-25-106553 · tm2530190-2_4seq1.xml · nonDerivative · entry 4

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 20,729,880

F4 · price: For each Class A Unit of Net Power Operations LLC, NPEH owns a corresponding share of Class B Common Stock of the Issuer. Upon the exchange of 2,000,000 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.

F5 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F6 · ownership.nature: 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 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.

Read SEC document
November 03, 2025 Filed Nov 5, 2025 02:17 UTC Net Power Inc. NPWR · Entity 6500 ConversionClass A Common Stock 2,000,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-25-106553 · tm2530190-2_4seq1.xml · nonDerivative · entry 3

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,838,653

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

F3 · price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On November 03, 2025, NPEH exchanged 2,000,000 Class A Units of NET Power Operations LLC for 2,000,000 shares of the Issuer's Class A Common Stock.

F5 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F6 · ownership.nature: 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 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.

Read SEC document
November 03, 2025 Filed Nov 5, 2025 02:17 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 8,477 $4.00 $33,929.19
Disclosure

SEC source: 0001104659-25-106553 · tm2530190-2_4seq1.xml · nonDerivative · entry 2

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 1,838,653

F2 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.00 to $4.01. 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.

F5 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F6 · ownership.nature: 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 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.

Read SEC document
October 31, 2025 Filed Nov 5, 2025 02:17 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 18,116 $4.05 $73,418.71
Disclosure

SEC source: 0001104659-25-106553 · tm2530190-2_4seq1.xml · nonDerivative · entry 1

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 1,847,130

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.05 to $4.06. NPEH, LLC ("NPEH") will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F5 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F6 · ownership.nature: 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 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.

Read SEC document
October 30, 2025 Filed Oct 30, 2025 23:38 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 107,754 $4.04 $435,067.55
Disclosure

SEC source: 0001104659-25-104536 · tm2529849-1_4seq1.xml · nonDerivative · entry 3

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 1,865,246

F3 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.00 to $4.105. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F4 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F5 · ownership.nature: Damian R. Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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October 29, 2025 Filed Oct 30, 2025 23:38 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 786,832 $4.12 $3,239,072.61
Disclosure

SEC source: 0001104659-25-104536 · tm2529849-1_4seq1.xml · nonDerivative · entry 2

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 1,973,000

F2 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.72 to $4.315. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F4 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F5 · ownership.nature: Damian R. Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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October 28, 2025 Filed Oct 30, 2025 23:38 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 7,585 $3.77 $28,591.66
Disclosure

SEC source: 0001104659-25-104536 · tm2529849-1_4seq1.xml · nonDerivative · entry 1

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 2,759,832

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.72 to $3.78. NPEH, LLC ("NPEH") will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F4 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F5 · ownership.nature: Damian R. Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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October 27, 2025 Filed Oct 27, 2025 23:54 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 200,000 $3.77 $753,240.00
Disclosure

SEC source: 0001104659-25-102683 · tm2529510-1_4seq1.xml · nonDerivative · entry 3

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 2,767,417

F3 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.705 to $3.85. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F4 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F5 · ownership.nature: Damian R. Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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October 24, 2025 Filed Oct 27, 2025 23:54 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 32,583 $3.70 $120,684.17
Disclosure

SEC source: 0001104659-25-102683 · tm2529510-1_4seq1.xml · nonDerivative · entry 2

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 2,967,417

F2 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.70 to $3.725. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F4 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F5 · ownership.nature: Damian R. Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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October 23, 2025 Filed Oct 27, 2025 23:54 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 284,100 $3.69 $1,048,357.41
Disclosure

SEC source: 0001104659-25-102683 · tm2529510-1_4seq1.xml · nonDerivative · entry 1

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,000,000

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.33 to $4.05. NPEH, LLC ("NPEH") will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F4 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F5 · ownership.nature: Damian R. Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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October 22, 2025 Filed Oct 23, 2025 00:55 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 89,000 $3.31 $294,331.90
Disclosure

SEC source: 0001104659-25-101628 · tm2529224-2_4seq1.xml · nonDerivative · entry 3

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,284,100

F3 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.225 to $3.365. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F4 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F5 · ownership.nature: Damian R. Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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October 21, 2025 Filed Oct 23, 2025 00:55 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 189,300 $3.53 $668,361.51
Disclosure

SEC source: 0001104659-25-101628 · tm2529224-2_4seq1.xml · nonDerivative · entry 2

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,373,100

F2 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.51 to $3.5775. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F4 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F5 · ownership.nature: Damian R. Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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October 20, 2025 Filed Oct 23, 2025 00:55 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 201,000 $3.58 $719,258.40
Disclosure

SEC source: 0001104659-25-101628 · tm2529224-2_4seq1.xml · nonDerivative · entry 1

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,562,400

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.51 to $3.72. NPEH, LLC ("NPEH") will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F4 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F5 · ownership.nature: Damian R. Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. or Mrs. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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October 16, 2025 Filed Oct 17, 2025 01:01 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 13,959 $4.71 $65,692.45
Disclosure

SEC source: 0001104659-25-100173 · tm2528899-1_4seq1.xml · nonDerivative · entry 5

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,763,400

F5 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.50 to $4.83. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

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

F7 · ownership.nature: Damian Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of these securities except to the extent of his or her pecuniary interest therein.

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October 15, 2025 Filed Oct 17, 2025 01:01 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 122,641 $4.88 $598,316.38
Disclosure

SEC source: 0001104659-25-100173 · tm2528899-1_4seq1.xml · nonDerivative · entry 4

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,777,359

F4 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.85 to $4.925. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

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

F7 · ownership.nature: Damian Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of these securities except to the extent of his or her pecuniary interest therein.

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October 15, 2025 Filed Oct 17, 2025 01:01 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 100,000 $4.83 $483,210.00
Disclosure

SEC source: 0001104659-25-100173 · tm2528899-1_4seq1.xml · nonDerivative · entry 3

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 3,900,000

F3 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.67 to $4.93. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

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

F7 · ownership.nature: Damian Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of these securities except to the extent of his or her pecuniary interest therein.

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October 14, 2025 Filed Oct 17, 2025 01:01 UTC Net Power Inc. NPWR · Entity 6500 ConversionClass A Units of NET Power Operations LLC · Derivative 4,000,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-25-100173 · tm2528899-1_4seq1.xml · derivative · entry 6

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 22,729,880

Underlying: Class A Common Stock · 4,000,000 shares

Expires not disclosed

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

F1 · derivative.exercise_price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On October 14, 2025, NPEH, LLC ("NPEH") exchanged 4,000,000 Class A Units of NET Power Operations LLC for 4,000,000 shares of the Issuer's Class A Common Stock.

F1 · price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On October 14, 2025, NPEH, LLC ("NPEH") exchanged 4,000,000 Class A Units of NET Power Operations LLC for 4,000,000 shares of the Issuer's Class A Common Stock.

F1 · derivative.exercise_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On October 14, 2025, NPEH, LLC ("NPEH") exchanged 4,000,000 Class A Units of NET Power Operations LLC for 4,000,000 shares of the Issuer's Class A Common Stock.

F1 · derivative.expiration_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On October 14, 2025, NPEH, LLC ("NPEH") exchanged 4,000,000 Class A Units of NET Power Operations LLC for 4,000,000 shares of the Issuer's Class A Common Stock.

F3 · ownership.nature: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $4.67 to $4.93. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

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October 14, 2025 Filed Oct 17, 2025 01:01 UTC Net Power Inc. NPWR · Entity 6500 OtherClass B Common Stock 4,000,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-25-100173 · tm2528899-1_4seq1.xml · nonDerivative · entry 2

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 22,729,880

F2 · price: For each Class A Unit of Net Power Operations LLC, NPEH owns a corresponding share of Class B Common Stock of the Issuer. Upon the exchange of 4,000,000 Class A Units of Net Power Operations LLC, an equal number of shares of Class B Common Stock of the Issuer held by NPEH, which have no economic value, were cancelled.

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

F7 · ownership.nature: Damian Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of these securities except to the extent of his or her pecuniary interest therein.

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October 14, 2025 Filed Oct 17, 2025 01:01 UTC Net Power Inc. NPWR · Entity 6500 ConversionClass A Common Stock 4,000,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-25-100173 · tm2528899-1_4seq1.xml · nonDerivative · entry 1

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

BEAUCHAMP DAMIAN R. · CIK 0001973442 · 10% owner

Beauchamp Cynda · CIK 0002079418 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 4,000,000

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

F1 · price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On October 14, 2025, NPEH, LLC ("NPEH") exchanged 4,000,000 Class A Units of NET Power Operations LLC for 4,000,000 shares of the Issuer's Class A Common Stock.

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

F7 · ownership.nature: Damian Beauchamp ("Mr. Beauchamp") and Cynda Beauchamp ("Mrs. Beauchamp") are married and each independently indirectly owns approximately 34.2% of 8 Rivers. Accordingly, each may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his or her pecuniary interest therein. Mr. and Mrs. Beauchamp disclaim beneficial ownership of these securities except to the extent of his or her pecuniary interest therein.

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November 22, 2024 Filed Nov 27, 2024 02:00 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 431,009 $12.76 $5,499,243.83
Disclosure

SEC source: 0001104659-24-123261 · tm2429528-2_4seq1.xml · nonDerivative · entry 1

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 0

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $12.50 to $13.46. 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.

F2 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F3 · ownership.nature: SK Inc. ("SK") directly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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November 21, 2024 Filed Nov 22, 2024 01:37 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 509,040 $12.72 $6,473,105.35
Disclosure

SEC source: 0001104659-24-121693 · tm2429117-2_4seq1.xml · nonDerivative · entry 4

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 431,009

F4 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $12.55 to $13.04. 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.

F5 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F6 · ownership.nature: SK Inc. ("SK") directly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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November 20, 2024 Filed Nov 22, 2024 01:37 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 320,371 $12.60 $4,035,649.41
Disclosure

SEC source: 0001104659-24-121693 · tm2429117-2_4seq1.xml · nonDerivative · entry 3

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 940,049

F3 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $12.315 to $12.93. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F5 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F6 · ownership.nature: SK Inc. ("SK") directly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
November 19, 2024 Filed Nov 22, 2024 01:37 UTC Net Power Inc. NPWR · Entity 6500 ConversionClass A Units of NET Power Operations LLC · Derivative 1,260,420 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-24-121693 · tm2429117-2_4seq1.xml · derivative · entry 5

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 26,729,880

Underlying: Class A Common Stock · 1,260,420 shares

Expires not disclosed

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

F1 · derivative.exercise_price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On November 19, 2024, NPEH, LLC ("NPEH") exchanged 1,260,420 Class A Units of NET Power Operations LLC for 1,260,420 shares of the Issuer's Class A Common Stock.

F1 · price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On November 19, 2024, NPEH, LLC ("NPEH") exchanged 1,260,420 Class A Units of NET Power Operations LLC for 1,260,420 shares of the Issuer's Class A Common Stock.

F1 · derivative.exercise_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On November 19, 2024, NPEH, LLC ("NPEH") exchanged 1,260,420 Class A Units of NET Power Operations LLC for 1,260,420 shares of the Issuer's Class A Common Stock.

F1 · derivative.expiration_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On November 19, 2024, NPEH, LLC ("NPEH") exchanged 1,260,420 Class A Units of NET Power Operations LLC for 1,260,420 shares of the Issuer's Class A Common Stock.

F5 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F6 · ownership.nature: SK Inc. ("SK") directly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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November 19, 2024 Filed Nov 22, 2024 01:37 UTC Net Power Inc. NPWR · Entity 6500 OtherClass B Common Stock 1,260,420 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-24-121693 · tm2429117-2_4seq1.xml · nonDerivative · entry 2

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 26,729,880

F2 · price: For each Class A Unit of Net Power Operations LLC, NPEH owns a corresponding share of Class B Common Stock of the Issuer. Upon the exchange of 1,260,420 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.

F5 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F6 · ownership.nature: SK Inc. ("SK") directly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
November 19, 2024 Filed Nov 22, 2024 01:37 UTC Net Power Inc. NPWR · Entity 6500 ConversionClass A Common Stock 1,260,420 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-24-121693 · tm2429117-2_4seq1.xml · nonDerivative · entry 1

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 1,260,420

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

F1 · price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On November 19, 2024, NPEH, LLC ("NPEH") exchanged 1,260,420 Class A Units of NET Power Operations LLC for 1,260,420 shares of the Issuer's Class A Common Stock.

F5 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F6 · ownership.nature: SK Inc. ("SK") directly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
October 17, 2024 Filed Oct 19, 2024 00:00 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 199,369 $7.33 $1,460,736.79
Disclosure

SEC source: 0001104659-24-109959 · tm2426503-1_4seq1.xml · nonDerivative · entry 2

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 0

F2 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.10 to $7.555. 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.

F3 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F4 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
October 16, 2024 Filed Oct 19, 2024 00:00 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 517,618 $7.12 $3,685,595.45
Disclosure

SEC source: 0001104659-24-109959 · tm2426503-1_4seq1.xml · nonDerivative · entry 1

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 199,369

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.00 to $7.175. 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.

F3 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F4 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
October 11, 2024 Filed Oct 11, 2024 22:32 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 120,500 $6.92 $833,414.15
Disclosure

SEC source: 0001104659-24-108148 · tm2426102-1_4seq1.xml · nonDerivative · entry 2

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 716,987

F2 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $6.90 to $7.00. 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.

F3 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F4 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
October 09, 2024 Filed Oct 11, 2024 22:32 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 122,591 $6.95 $851,725.49
Disclosure

SEC source: 0001104659-24-108148 · tm2426102-1_4seq1.xml · nonDerivative · entry 1

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 837,487

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $6.90 to $7.04. 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.

F3 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F4 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
October 07, 2024 Filed Oct 7, 2024 22:47 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 54,922 $7.00 $384,536.38
Disclosure

SEC source: 0001104659-24-106772 · tm2425771-2_4seq1.xml · nonDerivative · entry 6

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 960,078

F8 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.00 to $7.02. 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

F3 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F4 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
October 07, 2024 Filed Oct 7, 2024 22:47 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 8,871 $7.01 $62,147.56
Disclosure

SEC source: 0001104659-24-106772 · tm2425771-2_4seq1.xml · nonDerivative · entry 5

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F7 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.00 to $7.04. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
October 04, 2024 Filed Oct 7, 2024 22:47 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 5,419 $7.01 $37,966.60
Disclosure

SEC source: 0001104659-24-106772 · tm2425771-2_4seq1.xml · nonDerivative · entry 4

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,871

F6 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.00 to $7.04. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
October 03, 2024 Filed Oct 7, 2024 22:47 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 10,433 $7.00 $73,052.91
Disclosure

SEC source: 0001104659-24-106772 · tm2425771-2_4seq1.xml · nonDerivative · entry 3

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,290

F5 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.00 to $7.03. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
September 30, 2024 Filed Oct 2, 2024 21:28 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 46,585 $7.07 $329,286.07
Disclosure

SEC source: 0001104659-24-105501 · tm2425478-1_4seq1.xml · nonDerivative · entry 1

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,723

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.00 to $7.20. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
September 25, 2024 Filed Oct 7, 2024 22:47 UTC Net Power Inc. NPWR · Entity 6500 ConversionClass A Units of Net Power Operations LLC · Derivative 1,015,000 $0.00 $0.00
Disclosure

SEC source: 0001104659-24-106772 · tm2425771-2_4seq1.xml · derivative · entry 7

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 27,990,300

Underlying: Class A Common Stock · 1,015,000 shares

Expires not disclosed

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

F1 · derivative.exercise_price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 25, 2024, NPEH, LLC ("NPEH") exchanged 1,015,000 Class A Units of NET Power Operations LLC for 1,015,000 shares of the Issuer's Class A Common Stock.

F1 · derivative.exercise_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 25, 2024, NPEH, LLC ("NPEH") exchanged 1,015,000 Class A Units of NET Power Operations LLC for 1,015,000 shares of the Issuer's Class A Common Stock.

F1 · derivative.expiration_date: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 25, 2024, NPEH, LLC ("NPEH") exchanged 1,015,000 Class A Units of NET Power Operations LLC for 1,015,000 shares of the Issuer's Class A Common Stock.

F3 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F4 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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September 25, 2024 Filed Oct 7, 2024 22:47 UTC Net Power Inc. NPWR · Entity 6500 OtherClass B Common Stock 1,015,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-24-106772 · tm2425771-2_4seq1.xml · nonDerivative · entry 2

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 27,990,300

F2 · price: For each Class A Unit of Net Power Operations LLC, NPEH owns a corresponding share of Class B Common Stock of the Issuer. Upon the exchange of 1,015,000 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.

F3 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F4 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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September 25, 2024 Filed Oct 7, 2024 22:47 UTC Net Power Inc. NPWR · Entity 6500 ConversionClass A Common Stock 1,015,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-24-106772 · tm2425771-2_4seq1.xml · nonDerivative · entry 1

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By: NPEH, LLC

Disclosed balance after: 1,015,000

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

F1 · price: The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On September 25, 2024, NPEH, LLC ("NPEH") exchanged 1,015,000 Class A Units of NET Power Operations LLC for 1,015,000 shares of the Issuer's Class A Common Stock.

F3 · ownership.nature: As manager and holder of approximately 91.4% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

F4 · ownership.nature: SK Inc. ("SK") indirectly beneficially owns 100.0% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedorea"). Each of Tillandsia, Areca and Chamaedorea beneficially owns approximately 18.06%, 25.02% and 23.41%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the securities beneficially owned by 8 Rivers and NPEH. SK disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that SK is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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September 23, 2024 Filed Sep 24, 2024 21:58 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 1,764 $7.00 $12,351.53
Disclosure

SEC source: 0001104659-24-102501 · tm2424666-1_4seq1.xml · nonDerivative · entry 2

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,310

F2 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.00 to $7.05. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

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September 23, 2024 Filed Oct 2, 2024 21:27 UTC Amendment Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 1,764 $7.00 $12,351.53
Disclosure

SEC source: 0001104659-24-105497 · tm2425478-2_4aseq1.xml · nonDerivative · entry 2

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,308

F3 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.00 to $7.05. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F1 · balance_after: This amendment is being filed to correct an administrative error in reporting the number of shares of Class A Common Stock sold by the Reporting Person on September 20, 2024 and the resulting errors in the number of shares of Class A Common Stock beneficially owned following the reported transactions.

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September 20, 2024 Filed Sep 24, 2024 21:58 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 26,926 $7.00 $188,578.93
Disclosure

SEC source: 0001104659-24-102501 · tm2424666-1_4seq1.xml · nonDerivative · entry 1

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,074

F1 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.00 to $7.03. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

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September 20, 2024 Filed Oct 2, 2024 21:27 UTC Amendment Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 26,928 $7.00 $188,592.94
Disclosure

SEC source: 0001104659-24-105497 · tm2425478-2_4aseq1.xml · nonDerivative · entry 1

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,072

F1 · shares: This amendment is being filed to correct an administrative error in reporting the number of shares of Class A Common Stock sold by the Reporting Person on September 20, 2024 and the resulting errors in the number of shares of Class A Common Stock beneficially owned following the reported transactions.

F2 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.00 to $7.03. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

F1 · balance_after: This amendment is being filed to correct an administrative error in reporting the number of shares of Class A Common Stock sold by the Reporting Person on September 20, 2024 and the resulting errors in the number of shares of Class A Common Stock beneficially owned following the reported transactions.

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September 19, 2024 Filed Sep 19, 2024 23:15 UTC Net Power Inc. NPWR · Entity 6500 SaleClass A Common Stock 400,000 $7.05 $2,820,360.00
Disclosure

SEC source: 0001104659-24-101442 · tm2424426-2_4seq1.xml · nonDerivative · entry 4

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

SK INC. · CIK 0001947998 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,000

F4 · price: The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $7.005 to $7.16. The Reporting Persons 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.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.