Solaris Energy Infrastructure, Inc.

During the three months ended March 31, 2025, no director or officer of the Company adopted orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.

On April 26, 2025, a member of our board of directors, F. Gardner Parker, passed away. The Company expresses its deepest condolences to the family of Mr. Parker and greatly appreciates his contributions and Board service since our initial public offering. On the morning of April 28, 2025, M. Max Yzaguirre was appointed to serve as a member of our Audit Committee. In connection therewith, our board of directors determined that Mr. Yzaguirre met the independence requirements under the NYSE and SEC rules and regulations applicable to audit committee members and was determined to be “financially literate” within the meaning of the applicable rules of the SEC and the listing standards of the NYSE. On May 5, 2025, we notified the NYSE, via written affirmation, the changes in our board composition and audit committee.