X0508 4 2025-10-31 0 0001845437 NET Power Inc. NPWR 0001981772 NPEH, LLC 406 BLACKWELL STREET, 4TH FLOOR DURHAM NC 27701 0 0 1 0 0 Class A Common Stock 2025-10-31 4 S 0 18116 4.0527 D 1847130 D Class A Common Stock 2025-11-03 4 S 0 8477 4.0025 D 1838653 D Class A Common Stock 2025-11-03 4 C 0 2000000 A 3838653 D Class B Common Stock 2025-11-03 4 J 0 2000000 D 20729880 D Class A Units of NET Power Operations LLC 2025-11-03 4 C 0 2000000 D Class A Common Stock 2000000 20729880 D 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. 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. 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. 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. By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC, its Manager 2025-11-04