TETRA TECHNOLOGIES INC

The 2024 Annual Meeting of Stockholders (the "Annual Meeting") of TETRA Technologies, Inc. (“TETRA” or the “Company”) will be held as follows:

At the Annual Meeting, you will be asked to consider and take action on the following:

1. Election of eight directors to serve on TETRA's Board of Directors (the "Board of Directors" or the “Board”) for one-year terms ending at the 2025 Annual Meeting of Stockholders (the "2025 Annual Meeting"), or until their respective successors have been duly elected or appointed;

2. Advisory vote to approve executive compensation;

3. Ratification of the appointment of Grant Thornton LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2024; and

4. Vote on a stockholder proposal entitled, “Proposal 4 – Shareholder Right to Act by Written Consent,” if properly presented at the Annual Meeting.

Additionally, if needed, the stockholders may act upon any other matters that may properly come before the Annual Meeting or any adjournments.

Only stockholders of record at the close of business on March 25, 2024 will be entitled to notice of and to vote at the Annual Meeting. The proxy statement, form of proxy, and voting instructions are first being made available to stockholders on or about April 8, 2024 atwww.envisionreports.com/TTI for registered holders and atwww.proxyvote.com for beneficial holders.

Your vote is important!Please promptly vote your shares by telephone, the internet, or, if the proxy statement was mailed to you, by marking, signing, dating, and returning the enclosed proxy card as soon as possible, regardless of whether you plan to attend the Annual Meeting. You may revoke your proxy at any time before it is voted.

By Order of the Board Of Directors

Kimberly M. O'Brien

Corporate Secretary

April 8, 2024

The Woodlands, Texas

PROXY STATEMENT

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PROXY STATEMENT SUMMARY

This summary provides an overview of selected information contained elsewhere in the Proxy Statement and does not contain all the information you should consider. You should refer to the remainder of the Proxy Statement for more information about us and the proposals you are being asked to consider.