X0407 4 2023-06-08 0 0001845437 NET Power Inc. NPWR 0001980281 FORREST BROCK C/O NET POWER INC. 404 HUNT STREET, SUITE 410 DURHAM NC 27701 0 1 0 0 Chief Technology Officer 0 Class B Common Stock 2023-06-08 4 A 0 596917 A 596917 I By Forrest Family Capital, LLC Class A Units of NET Power Operations LLC 2023-06-08 4 A 0 596917 A Class A common stock 596917 596917 I By Forrest Family Capital, LLC On June 8, 2023, as a result of the consummation of the transactions (the "Business Combination") contemplated by that certain Business Combination Agreement, dated December 13, 2022 and subsequently amended on April 23, 2023, by and among the issuer, NET Power Operations LLC (f/k/a Rice Acquisition Holdings II LLC) ("Opco"), Topo Buyer Co, LLC, Topo Merger Sub, LLC and NET Power, LLC ("Old NET Power"), in exchange for the equity interests of Old NET Power, which were cancelled, Forrest Family Capital, LLC received Class A units of Opco (the "Opco Units") and a corresponding number of shares of the issuer's Class B common stock (which together are exchangeable into shares of the issuer's Class A Common Stock on a one-for-one basis). The Opco Units (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into cash or shares of the issuer's Class A common stock, at the issuer's election, on a one-for-one basis and have no expiration date. /s/ Abbey MacDonald, Attorney-in-Fact 2023-06-12