Elijio V. Serrano's departure as Chief Financial Officer of Tetra Technologies Inc was reported, effective March 31, 2026; the filing names no successor. As of November 6, 2026, Tetra Technologies Inc has reported one leadership change filing to the SEC under Item 5.02 of Form 8-K, on April 2, 2026, naming 1 departure (Form 8-K, April 2, 2026).
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Tetra Technologies Inc reported a change among its directors and officers to the SEC on Form 8-K, Item 5.02, on 2026-04-02. It names 1 person. Every row below is cited to the filing it comes from, and this page adds each new change as Tetra Technologies Inc files it.
Also on the record for Tetra Technologies Inc
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| October 6, 2026 | Stake report, Schedule 13G/A, by Neuberger Berman Group LLC | 4.9% of the class | 5%+ stakes | Source |
| May 15, 2026 | Stake report, Schedule 13G/A, by Ameriprise Financial, Inc. | 4.1% of the class | 5%+ stakes | Source |
| March 27, 2026 | Stake report, Schedule 13G/A, by The Vanguard Group | — | 5%+ stakes | Source |
| February 17, 2026 | Stake report, Schedule 13G, by Ameriprise Financial, Inc. | 5.2% of the class | 5%+ stakes | Source |
| February 17, 2026 | Stake report, Schedule 13G/A, by Fuller & Thaler Asset Management, Inc. | — | 5%+ stakes | Source |
| October 17, 2025 | Stake report, Schedule 13G/A, by BlackRock, Inc. | 7.6% of the class | 5%+ stakes | Source |
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More on Tetra Technologies Inc and the records around it.
Tetra Technologies Inc elsewhere on the record
Companies that share a holder
- Fuller & Thaler Asset Management, Inc. also filed stake reports on 35 other companies: COLLEGIUM PHARMACEUTICAL, INC (Aug 2026), Graphic Packaging Holding Co (Aug 2026), Primoris Services Corp (Aug 2026)
- Neuberger Berman Group LLC also filed stake reports on 37 other companies: Stock Yards Bancorp, Inc. (Nov 2026), TRANSCAT INC (Nov 2026), Hagerty Inc CLass A (Oct 2026)
- Ameriprise Financial, Inc. also filed stake reports on 65 other companies: Universal Electronics Inc. (Sep 2026), America's Car-Mart, Inc. (Aug 2026), Ampco-Pittsburgh Corporation (Aug 2026)
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Timeline
| Filed | In / out | Person | Role | Effective | Source |
|---|---|---|---|---|---|
| 2026-04-02 | Out | Chief Financial Officer | 2026-03-31 | 8-K/A, 2026-04-02 |
Who leads Tetra Technologies Inc, as last reported?
For each role that changed in the filings below, the most recent change reported. A role that did not change in these filings is not listed.
- Chief Financial Officer: Elijio V. Serrano, departure reported, effective 2026-03-31 (filed 2026-04-02). No successor is named in these filings.
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Departing: Elijio V. Serrano, Chief Financial Officer, effective 2026-03-31
As reported in the Current Report on Form 8-K filed on October 27, 2025, TETRA Technologies, Inc. ("TETRA" or the "Company") announced that on October 24, 2025 Elijio V. Serrano informed the Company that he intended to retire from his position as Senior Vice President and Chief Financial Officer (principal financial officer) of TETRA, effective March 31, 2026, and the Company's board of directors had appointed Matthew J. Sanderson as Executive Vice President and Chief Financial Officer (principal financial officer), to be effective upon Mr. Serrano's retirement from such position.
- Mr. Sanderson currently serves as the Executive Vice President and Chief Commercial Officer of TETRA and will continue to manage certain responsibilities associated with this position.
- Sanderson Compensation Arrangements Commencing upon the effectiveness of his appointment as Chief Financial Officer, Mr. Sanderson's base compensation will be increased to $490,000 per year from $467,500 per year, his target annual incentive award as a percentage of base salary will be increased to 90% (from 80%) and his total target long-term award value (i.e., the values targeted by the Human Capital Management and Compensation Committee of the Company's Board of Directors) when granting restricted stock unit and long-term performance-based cash awards) will be increased to $925,000 from $750,000.
- In addition, Mr. Sanderson's change of control agreement will be amended to increase the amount of the benefits payable thereunder to 2.5 times his annual base salary and target annual bonus amounts.
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Where this comes from
A public company must file a current report on Form 8-K with the SEC within four business days when a director leaves or is elected, or when its chief executive, chief financial, chief accounting or chief operating officer, or another named executive, departs or is appointed. That disclosure goes under Item 5.02 of the report.
Every change on this page is taken from one of those filings and quoted in the company's own words, with a link to the filing, so it can be checked at the source. Where a filing names the person, the role and the date a change takes effect, they are shown beside the quote. Where it does not, the quote stands on its own. A filing states what changed; it rarely states why, and neither does this page.