Item 2.02 Results of Operations and Financial Condition On July 23, 2025, Solaris Energy Infrastructure, Inc. (the “ Company”) issued a press release announcing its operating and financial results for the quarter ended June 30, 2025. A copy of the press release is furnished as Exhibit 99.1 and incorporated by reference herein. Additionally, on July 23, 2025, the Company posted a new investor presentation on its website, www. solaris-energy. com. A copy of the presentation can be reviewed at the Company’s website by first selecting “ Investors Relations,” and then selecting the “ View All Events and Presentations” tab. Information on the Company’s website does not constitute a part of this Current Report on Form 8-K. The information in this Item 2.02, including Exhibit 99.1 to this Current Report on Form 8-K, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “ Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01 Financial Statements and Exhibits. (d)Exhibits. Exhibit Number Description 99.1 Solaris Energy Infrastructure, Inc. press release dated July 23, 2025 ───────────────────────────────────────────────────────────────────────────────────────────── 104 Cover Page Interactive Data File (formatted as inline XBRL) SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Date: July 23, 2025 SOLARIS ENERGY INFRASTRUCTURE, INC. By: /s/ KYLE S. RAMACHANDRAN Name: Kyle S. Ramachandran Title: President and Chief Financial Officer