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Solaris Energy Infrastructure, Inc.

For the period ended May 15, 2026. Filed Apr 1, 2026.

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What shareholders are asked to vote on at a company's meeting. It is where to find what directors and top executives are paid, and who owns the most shares.

May 15, 2026 · Filed Apr 1, 2026

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SEI$57.77+14.3%Stored close · as of Nov 6, 2026
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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a)

of the Securities Exchange Act of 1934

(Amendment No. )

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐Preliminary Proxy Statement
☐Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☒Definitive Proxy Statement
☐Definitive Additional Materials
☐Soliciting Material Pursuant to §240.14a-12

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

☒No fee required.
☐Fee paid previously with preliminary materials.
☐Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

The Stockholders of Solaris Energy Infrastructure, Inc.:

Notice is hereby given that the 2026 Annual Meeting of Stockholders (the “Annual Meeting”) of Solaris Energy Infrastructure, Inc. (the “Company”) will be held on Friday, May 15, 2026, at 9:00 a.m. local time, at Solaris Energy Infrastructure, Inc., 9651 Katy Freeway, Suite 300, Houston, Texas 77024.

The Annual Meeting will be held for the following purposes:

1.To elect three Class III Directors, the names of whom are set forth in the accompanying proxy statement, to serve until the 2029 Annual Meeting of Stockholders.
2.To ratify the appointment of BDO USA, P.C. as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026.
3.Advisory, non-binding vote to approve the compensation of the Company’s Named Executive Officers for the year ended December 31, 2025.
4.To transact such other business as may properly be brought before the Annual Meeting.

Stockholders of record at the close of business on March 20, 2026 are the only stockholders entitled to notice of, and to vote at, the Annual Meeting. This list of stockholders will also be available for inspection at the Annual Meeting and may be inspected by any stockholder for any purpose germane to the Annual Meeting. If you would like to inspect the stockholder list, please call our Investor Relations department at (281) 501-3070.

It is important that your shares be represented at the Annual Meeting. Accordingly, even if you plan to attend the Annual Meeting in person, please complete, sign, date and promptly return the enclosed proxy card in the postage-prepaid envelope prior to the Annual Meeting or follow the Internet or telephone voting procedures described on the enclosed proxy card. If you attend the Annual Meeting and wish to vote in person, you may withdraw your proxy and vote in person. Your prompt consideration is greatly appreciated.

By Order of the Board of Directors,

/s/ Christopher M. Powell

Christopher M. Powell

Chief Legal Officer and Corporate Secretary

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE ANNUAL MEETING OF STOCKHOLDERS TO BE HELD ON MAY 15, 2026: We have elected to take advantage of the U.S. Securities and Exchange Commission’s rules that allow companies to furnish proxy materials to their stockholders on the Internet. The proxy materials including this Notice of Annual Meeting, the accompanying proxy statement and our Annual Report on Form 10-K for the year ended December 31, 2025 are available at www.proxyvote.com.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.