Item 2.02. Results of Operations and Financial Condition. As reported in a Current Report on Form 8-K filedwith the U. S. Securities and Exchange Commission (“ SEC”) by Solaris Energy Infrastructure, Inc. (the “ Company”) on September 17, 2024, as amended on aForm 8-K/A filedwith the SEC on November 18, 2024, the Company consummated the acquisition contemplated by the Contribution Agreement, dated July 9, 2024, by and between the Company, Solaris Energy Infrastructure, LLC (f/k/a Solaris Oilfield Infrastructure, LLC), a Delaware limited liability company and a subsidiary of the Company (“ Solaris LLC”), John A. Johnson, an individual resident of the State of Florida, John Tuma, an individual resident of the State of Texas, J Turbines, Inc., a Delaware corporation (“ J Turbines”) and KTR Management Company, LLC, a Texas limited liability company (“ KTR” and together with J Turbines, the “ Contributors”), pursuant to which the Contributors agreed to contribute (the “ Contribution”) all of the issued and outstanding equity interests of Mobile Energy Rentals, LLC, a Texas limited liability company (“ MER”), to Solaris LLC (such transaction, the “ MER Acquisition”).

Item 7.01. Regulation FD Disclosure. The information contained in Item 8.01 of this Current Report on Form8-Kis incorporated into this Item 7.01 by reference. The information contained in this Item 7.01 shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, and is not incorporated by reference into any filing under the Securities Act or the Exchange Act.

Item 8.01. Other Events. This Current Report on Form8-Kprovides a pro forma statement of operations, as described in Item 9.01 below, which is incorporated into this Item 8.01 by reference.

Item 9.01. Financial Statements and Exhibits. (b)  Pro Forma Financial Information The following unaudited pro forma condensed combined financial information of the Company, giving effect to the MER Acquisition, attached as Exhibit 99.1 hereto: Unaudited Pro Forma Combined Statements of Operations for the year ended December 31, 2024; and ─────────────────────────────────────────────────────────────────────────────────────────────────── Notes to the Unaudited Pro Forma Combined Statement of Operations. (d)  Exhibits Exhibit Description No. 99.1 Unaudited Pro Forma Condensed Combined Financial Statements for the year ended December 31, 2024. ────────────────────────────────────────────────────────────────────────────────────────────────────────────────── 104 Cover Page Interactive Data File (embedded within Inline XBRL document). 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. SOLARIS ENERGY INFRASTRUCTURE, INC. By: /s/ Kyle S. Ramachandran Name: Kyle S. Ramachandran Title: President and Chief Financial Officer