Sec Form 4 Filing - PATEL AKASH S. @ NET Power Inc. - 2023-06-08

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person PATEL AKASH S. 2. Issuer Name and Ticker or Trading Symbol NET Power Inc. [ NPWR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) C/O NET POWER INC., 404 HUNT STREET, SUITE 410 3. Date of Earliest Transaction (MM/DD/YY) 06/08/2023 (Street) DURHAM, NC27701 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class B Common Stock 06/08/2023 A( 1 ) 790,448 A 790,448 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Class A Units of NET Power Operations LLC ( 2 ) 06/08/2023 A( 1 ) 790,448 ( 2 ) ( 2 ) Class A common stock 790,448 ( 1 ) 790,448 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other PATEL AKASH S. C/O NET POWER INC. 404 HUNT STREET, SUITE 410 DURHAM, NC27701 Chief Financial Officer Signatures /s/ Abbey MacDonald, Attorney-in-Fact 06/12/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )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, Mr. Patel 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). ( 2 )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.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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