Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. As previously reported on Solaris Energy Infrastructure, Inc.’s (the “ Company”) Current Report on Form8-Kfiled with the U. S. Securities and Exchange Commission on October 7, 2024, Kelly Price, the Company’s Chief Operating Officer and principal operating officer, retired from his position, effective as of December 31, 2024. Concurrently with the effectiveness of Mr. Price’s retirement, William A. Zartler, the Company’s current Chief Executive Officer, began serving as the Company’s principal operating officer. 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