# EDGAR Filing Document

**Accession Number:** 0000844965
**File Stem:** 0000844965-25-000067
**Filing Date:** 2025-10
**Character Count:** 12335
**Document Hash:** 1884c57d29e63cfe4225889341c12c33
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000844965-25-000067.hdr.sgml**: 20251027

**ACCESSION NUMBER**: 0000844965-25-000067

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 15

**CONFORMED PERIOD OF REPORT**: 20251024

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251027

**DATE AS OF CHANGE**: 20251027

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TETRA TECHNOLOGIES INC
- **CENTRAL INDEX KEY:** 0000844965
- **STANDARD INDUSTRIAL CLASSIFICATION:** CRUDE PETROLEUM & NATURAL GAS [1311]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 742148293
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-13455
- **FILM NUMBER:** 251417527

**BUSINESS ADDRESS:**
- **STREET 1:** 24955 INTERSTATE 45 NORTH
- **CITY:** THE WOODLANDS
- **STATE:** TX
- **ZIP:** 77380
- **BUSINESS PHONE:** 2813671983

**MAIL ADDRESS:**
- **STREET 1:** 24955 INTERSTATE 45 NORTH
- **CITY:** THE WOODLANDS
- **STATE:** TX
- **ZIP:** 77380

?xml version='1.0' encoding='ASCII'? tti-20251024

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, DC 20549** 

**FORM 8-K** 

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the**

**Securities Exchange Act of 1934**

**Date of report (Date of earliest event reported): October 24, 2025**

**TETRA Technologies, Inc.**

**(Exact Name of Registrant as Specified in Charter)** 

---

| | | |
|:---|:---|:---|
| **Delaware** | **1-13455** | **74-2148293** |
| **(State or Other Jurisdiction of Incorporation)** | **(Commission File Number)** | **(I.R.S. Employer Identification No.)** |

---

**24955 Interstate 45 North**

**The Woodlands, Texas 77380** 

**(Address of Principal Executive Offices, and Zip Code)**

**(281) 367-1983**

**Registrant's Telephone Number, Including Area Code**

<u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u>

 **(Former Name or Former Address, if Changed Since Last Report)** 

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (*see* General Instruction A.2. below):

 ☐ Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

 ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

 ☐ Pre-commencement communication pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

 ☐ Pre-commencement communication pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

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| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered |
| **Common Stock** | **TTI** | **New York Stock Exchange** |
| **Preferred Share Purchase Right** | **NA** | **New York Stock Exchange** |

---

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| | | |
|:---|:---|:---|
| Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). | Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). | Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). |
| | Emerging growth company | ☐ |
| If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  | If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  | ☐ |

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**Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.**

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 intends to retire from his position as Senior Vice President, Chief Financial Officer (principal financial officer) of TETRA, effective March 31, 2026. It is anticipated that Mr. Serrano will be retained as an advisor to Brady Murphy, CEO and President, on terms to be agreed upon. The Company will file an amendment to this Current Report on Form 8-K after the terms of Mr. Serrano's continuing compensation arrangements are determined.

TETRA also announced that its board of directors has 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.

Matthew J. Sanderson, 52, has served as our Executive Vice President and Chief Commercial Officer since September 2022. From December 2016 until September 2022, he served as our Senior Vice President responsible for our Water and Flowback Services division and our global Completion Fluids and Products division. Prior to joining TETRA, Mr. Sanderson spent over 19 years working at Schlumberger in various operational and functional leadership roles in North America and internationally. He earned a Bachelor of Applied Science in Civil Engineering (Environmental Option) from Queen's University in Kingston, Canada and a Master of Science in Oil and Gas Industry Management from Heriot-Watt University in Edinburgh, Scotland.

At this time, any changes to Mr. Sanderson's compensatory arrangements in connection with his appointment as Executive Vice President and Chief Financial Officer have not been determined. The Company will file an amendment to this Current Report on Form 8-K after such arrangements are determined. There are no arrangements or understandings between Mr. Sanderson and any other person pursuant to which he was appointed. There are no family relationships, as defined in Item 401 of SEC Regulation S-K, between Mr. Sanderson and any of TETRA's executive officers or directors or persons nominated or chosen to become a director or executive officer. There is no transaction in which Mr. Sanderson has an interest requiring disclosure under Item 404(a) of SEC Regulation S-K.

A copy of TETRA's news release relating to the foregoing is attached to this Current Report on Form 8-K and is incorporated by reference.

**Item 9.01 Financial Statements and Exhibits.**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;d) Exhibits.

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| | |
|:---|:---|
| <u>Exhibit Number</u> | <u>Description</u> |
| 99.1 | <u>[News Release dated October 27, 2025 issued by TETRA Technologies, Inc.](ex991.htm)</u> |
| 104 | Cover Page Interactive Data File (embedded within the inline XBRL document) |

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | |
|:---|:---|
| **TETRA Technologies, Inc.** | **TETRA Technologies, Inc.** |
| By: | /s/Brady M. Murphy |
|  | Brady M. Murphy |
|  | President and |
|  | Chief Executive Officer |

---

Date: October 27, 2025

## Exhibit 99.1

**<u>Exhibit 99.1</u>**

![image_0.jpg](image_0.jpg)

**TETRA TECHNOLOGIES, INC. ANNOUNCES CFO TRANSITION**

**WITH PLANNED RETIREMENT OF ELIJIO SERRANO AND**

**APPOINTMENT OF MATT SANDERSON**

*CHANGES REFLECT TETRA'S SUCCESSION PLANNING PROCESS*

THE WOODLANDS, TEXAS, October 27, 2025 / PR Newswire / - TETRA Technologies, Inc. ("TETRA" or the "Company") (NYSE:TTI) announced today that Elijio Serrano has notified the Company of his intention to retire as Senior Vice-President and Chief Financial Officer, effective March 31, 2026. Upon his retirement, Mr. Serrano will be retained as an advisor to Brady Murphy, CEO and President.

As part of TETRA's succession planning process, the Company will appoint Matt Sanderson as Executive Vice-President ("EVP") and Chief Financial Officer to take effect upon Mr. Serrano's retirement. Mr. Sanderson is currently EVP and Chief Commercial Officer, having joined TETRA in November 2016. Until Mr. Serrano's retirement becomes effective and Mr. Sanderson officially assumes the role of Chief Financial Officer, both executives will continue with their existing duties and responsibilities to deliver and execute on the Company's ONE TETRA 2030 objectives.

Brady Murphy expressed appreciation to Mr. Serrano for his significant contributions during his time with the Company. Mr. Murphy stated, "The Board and I would like to thank Elijio for his invaluable contributions throughout his years at TETRA. He has played a key role in guiding the company through some of the industry's most challenging times, including the COVID-19 pandemic in 2020. Additionally, Elijio has contributed greatly to shaping our transformational ONE TETRA 2030 strategy, which we recently presented at our Investor Day at the NYSE in New York City. Thanks to his efforts, we believe TETRA is well-positioned for future growth and value creation. It has been a genuine pleasure working with Elijio, and we are glad that he will continue to be involved with TETRA in a non-executive role. We want to congratulate Elijio on his outstanding career and his planned retirement."

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Mr. Murphy continued, "I am also very pleased to announce that upon Elijio's retirement, Matt will assume the responsibilities of Chief Financial Officer. Matt joined TETRA in 2016 after a successful 19-year career at SLB and has been a key contributor to the Company ever since. Before his current role as Chief Commercial Officer, he served as Senior Vice President of Energy Services from 2016 to 2022, where he played a vital role in establishing the company's leadership in the Water Management and Flowback and Completion Fluids and Products segments. Since becoming Chief Commercial Officer, he has contributed significantly to the Company's much improved financial performance over the past three years as well as to the ONE TETRA 2030 strategy and the enabling fluid chemistry technology development. I expect a very smooth transition, as Matt will continue to oversee some of his current responsibilities in his role as Chief Commercial Officer."

&nbsp;&nbsp;&nbsp;&nbsp;

**<u>Investor Contact</u>**

For further information, please contact Elijio Serrano, CFO, TETRA Technologies, Inc. at (281) 367-1983 or via email at eserrano@onetetra.com or Kurt Hallead, Treasurer and Vice President of Investor Relations at (281) 367-1983 or via email at <u>khallead@onetetra.com</u>.

**<u>Company Overview</u>**

TETRA Technologies, Inc. is an energy services and solutions company focused on developing environmentally conscious services and solutions that help make people's lives better. With operations on six continents, the Company's portfolio consists of Energy Services, Industrial Chemicals, and Critical Minerals. In addition to providing products and services to the oil and gas industry and calcium chloride for diverse applications, TETRA is expanding into the low-carbon energy market with chemistry expertise, key mineral acreage, and global infrastructure, helping to meet the demand for sustainable energy in the twenty-first century. Visit the Company's website at <u>www.onetetra.com</u> for more information or connect with us on <u>LinkedIn.</u>

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