and in Exhibit 99.1 to this Current Report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Entry into a Material Definitive Agreement. On June 12, 2026, TETRA Bromine Project LLC (“TBP”), a Delaware limited liability company and a wholly owned subsidiary of TETRA Technologies, Inc., a Delaware corporation (the “Company”), entered into a Master Services Agreement (the “Agreement”) with Diversified Construction & Design, L.L.C. (“Contractor”). The Agreement establishes the contractual framework under which the Contractor will provide construction, commissioning, and related services…

Regulation FD Disclosure On June 2, 2026, TETRA Technologies, Inc., a Delaware corporation (the “Company”), announced the pricing of an underwritten public offering (the “Offering”) of 10,810,811 shares of its common stock, par value $0.01 per share (“Common Stock”), at a price to the public of $9.25 per share, pursuant to a registration statement on Form S-3 (File No. 333-287210) (the “Registration Statement”) filed with the U.S. Securities and Exchange Commission (the “SEC”) on May 12, 2025…

Other Events On June 2, 2026, the Company and J.P. Morgan Securities LLC, as representative of the several underwriters named in Schedule 1 thereto (collectively, the “Underwriters”), entered into an underwriting agreement (the “Underwriting Agreement”), pursuant to which the Company agreed to sell to the Underwriters, and the Underwriters agreed to purchase from the Company, subject to and upon the terms and conditions set forth therein, 10,810,811 shares of Common Stock at the public offeri…

Other Events On June 2, 2026, the Company provided certain operational updates to potential investors, the relevant excerpts of which are set forth below. ******** Critical Minerals and Our Arkansas Bromine Project On May 28, 2026, we announced that our board of directors approved a final investment decision for the Arkansas Bromine Project, subject to securing necessary financing. Since commencement of the project in 2022 through March 31, 2026, we have invested approximately $49 million in…

and in Exhibit 99.1 to this Current Report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Chief Financial Officer (principal financial officer) — Elijio V. Serrano: Mr. Elijio V. Serrano is retiring as CFO, and Mr. Matthew J. Sanderson has been appointed to succeed him.

and in Exhibit 99.1 to this Current Report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

and in Exhibit 99.1 to this Current Report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Chief Financial Officer (principal financial officer) — Elijio V. Serrano: Senior Vice President and Chief Financial Officer Elijio V. Serrano is retiring, and Matthew J. Sanderson has been appointed as the new Executive Vice President and Chief Financial Officer.

and in Exhibit 99.1 to this Current Report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

The filing is about an equity plan amendment, not a management change.

and in Exhibit 99.1 to this Current Report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Director — Mark E. Baldwin: Mr. Baldwin decided to retire from the Board and not stand for re-election at the 2025 Annual Meeting.

and in Exhibit 99.1 to this Current Report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

and in Exhibit 99.1 to this Current Report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Vice President-Finance, Global Controller, Assistant Treasurer, and Principal Accounting Officer — Richard D. O’Brien: Richard D. O'Brien resigned to pursue another career opportunity.

Results of Operations and Financial Condition. On July 31, 2024 , TETRA Technologies, Inc., a Delaware corporation (the “Company”), issued a news release announcing its financial results for the second quarter of 2024 and a three-well deepwater TETRA CS Neptune fluids project in the Gulf of Mexico. The news release is furnished herewith as Exhibit 99.1 and is incorporated herein by reference. The information furnished in this

Entry into a Material Definitive Agreement. On May 13, 2024, TETRA Technologies, Inc., a Delaware corporation (“TETRA”), and certain of its subsidiaries entered into (i) an Agency Resignation, Appointment and Acceptance Agreement (the “Agency Resignation Agreement”) with JPMorgan Chase Bank, N.A., as resigning administrative agent (“JPM”), Bank of America, N.A., as successor administrative agent (“BofA”) and the lenders party thereto and (ii) an amendment (the “ABL Credit Agreement Amendment”…

and in Exhibit 99.1 to this Current Report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Director — Angela D. John: Ms. Angela D. John was appointed as a new director and joined the Audit Committee and Nominating, Governance and Sustainability Committee.

and in Exhibit 99.1 to this Current Report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Entry into a Material Definitive Agreement. New Term Loan Credit Agreement On January 12, 2024, the Company, as borrower, entered into that certain Credit Agreement (the “Term Loan Credit Agreement”) with Silver Point Finance, LLC, as administrative agent, and the lenders party thereto (collectively, the “Term Lenders”). The Term Loan Credit Agreement provides an initial term loan on the date of closing in the principal amount of $190 million (the “Initial Term Loan”) and the availability of…

Other Matters. On January 15, 2024, the Company issued a press release announcing the entry into the Term Loan Credit Agreement and the Fifth Amendment. A copy of the press release is attached as Exhibit 99.1 and incorporated herein by reference.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The disclosure set forth above in