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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13D/A 0002036326 XXXXXXXX LIVE 2 Class A Common Stock, par value $0.01 per share 07/28/2025 false 0001697500 83418M103 Solaris Energy Infrastructure, Inc. 9651 Katy Freeway Suite 300 Houston TX 77024 John A. Johnson (713) 254-9299 2929 Buffalo Speedway A1204 Houston TX 77098 0002036326 N J Turbines, Inc. b OO N DE 0.00 2114783.00 0.00 2114783.00 2114783.00 N 3.1 CO (1) Represents 2,114,783 shares of Class B common stock, par value $0.00 per share ("Class B common stock"), of Solaris Energy Infrastructure, Inc., a Delaware corporation (the "Issuer"), and an equal number of units ("Solaris LLC Units") of Solaris Energy Infrastructure, LLC, a Delaware limited liability company ("Solaris LLC") and operating subsidiary of the Issuer, held by J Turbines, Inc., a Delaware corporation ("J Turbines"). Shares of the Issuer's Class B common stock (together with a corresponding number of Solaris LLC Units) are exchangeable for shares of the Issuer's Class A common stock, par value $0.01 per share ("Class A common stock," and together with the Class B common stock, "Common Stock"), on a one-for-one basis. (2) The percentage calculation is based on an aggregate of 67,542,700 shares of Common Stock, which is comprised of (a) 40,403,557 shares of the Class A common stock and (b) 27,139,143 shares of the Class B common stock as of May 6, 2025, as reported in the Issuer's most recent Quarterly Report on Form 10-Q, filed with the U.S. Securities and Exchange Commission (the "SEC") on May 7, 2025. 0002036656 N John A. Johnson b OO N X1 0.00 2114783.00 0.00 2114783.00 2114783.00 N 3.1 IN (1) Represents 2,114,783 shares of Class B common stock, par value $0.00 per share ("Class B common stock") of Solaris Energy Infrastructure, Inc., a Delaware corporation (the "Issuer"), and an equal number of units ("Solaris LLC Units") of Solaris Energy Infrastructure, LLC, a Delaware limited liability company and operating subsidiary of the Issuer ("Solaris LLC"), held by J Turbines, Inc., a Delaware corporation ("J Turbines"). Shares of Class B common stock (together with a corresponding number of Solaris LLC Units) are exchangeable for shares of the Issuer's Class A Common Stock, par value $0.01 per share ("Class A common stock," and together with shares of Class B common stock, the "Common Stock"), on a one-for-one basis. (2) The percentage calculation is based on an aggregate of 67,542,700 shares of Common Stock, which is comprised of (a) 40,403,557 shares of the Class A common stock and (b) 27,139,143 shares of the Class B common stock as of May 6, 2025, as reported in the Issuer's most recent Quarterly Report on Form 10-Q, filed with the U.S. Securities and Exchange Commission (the "SEC") on May 7, 2025. Class A Common Stock, par value $0.01 per share Solaris Energy Infrastructure, Inc. 9651 Katy Freeway Suite 300 Houston TX 77024 On May 5, 2025, J Turbines (i) converted 1,850,000 shares of the Issuer's Class B common stock and an equal number of Solaris LLC Units into 1,850,000 shares of the Issuer's Class A common stock in accordance with the terms of the Second Amended and Restated Limited Liability Company Agreement of Solaris LLC, dated as of May 11, 2017, as amended from time to time (the "LLC Agreement"), pursuant to which Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock, and (ii) sold 1,850,000 shares of the Issuer's Class A common stock at a price per share of $20.60. On June 3 and 4, 2025, J Turbines (i) converted 150,000 shares of the Issuer's Class B common stock and an equal number of Solaris LLC Units into 150,000 shares of the Issuer's Class A common stock in accordance with the terms of the LLC Agreement, pursuant to which Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock, and (ii) sold 150,000 shares of the Issuer's Class A common stock at a weighted average price per share of $27.83. On July 28, 2025, J Turbines (i) converted 4,000,000 shares of the Issuer's Class B common stock and an equal number of Solaris LLC Units into 4,000,000 shares of the Issuer's Class A common stock in accordance with the terms of the LLC Agreement, pursuant to which Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock, and (ii) sold 4,000,000 shares of the Issuer's Class A common stock at a price per share of $30.30. (a) - (b) The aggregate number and percentage of shares of Common Stock beneficially owned by each of the Reporting Persons and, for such Reporting Persons, the number of shares as to which there is sole power to vote or to direct the vote, shared power to vote or to direct the vote, sole power to dispose or to direct the disposition, or shared power to dispose or to direct the disposition are set forth on rows 7 through 11 and row 13 of the cover pages of this Schedule 13D/A and are incorporated herein by reference. Except as set forth in this Schedule 13D/A, the Reporting Persons have not effected any transactions in the Common Stock during the past 60 days. No person other than the Reporting Persons is known to have the right to receive, or the power to direct the receipt of dividends from, or proceeds from the sale of, the Issuer's securities beneficially owned by the Reporting Persons. Not applicable. J Turbines, Inc. /s/ John A. Johnson John A. Johnson/President 07/30/2025 John A. Johnson /s/ John A. Johnson John A. Johnson 07/30/2025