TTI CFO Serrano logs RSU vesting and tax share surrender in Form 4

Rhea-AI Filing Summary

TETRA Technologies Sr. Vice President & CFO Elijio V. Serrano reported equity award activity involving restricted stock units and common shares. On February 28, 2026, 38,854 restricted stock units vested and converted into 38,854 shares of common stock at a price of $0.0000 per share, reflecting an exercise or conversion of derivative securities granted on February 28, 2025.

To cover related tax withholding on this vesting, 9,461 common shares were surrendered back to the issuer at $8.6600 per share as a tax-withholding disposition, rather than an open-market sale. Following these transactions, Serrano directly owned 1,552,408 shares of common stock and 77,710 restricted stock units. The remaining unvested portion of this restricted stock unit award is scheduled to vest every six months until fully vested on February 25, 2028, with each unit representing the contingent right to receive one share of common stock upon vesting.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SERRANO ELIJIO V

(Last) (First) (Middle)

10000 ENERGY DRIVE

SUITE 600

(Street)

SPRING TX 77389

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
TETRA TECHNOLOGIES INC [ TTI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Sr. Vice President & CFO

3. Date of Earliest Transaction (Month/Day/Year)
02/28/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/28/2026		M(1)		38,854	A	$0.00	1,561,869	D
Common Stock	02/28/2026		F(2)		9,461	D	$8.66	1,552,408	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	$0.00	02/28/2026		M(1)			38,854	(3)	(3)	Common Stock	38,854	$0.00	77,710	D

Explanation of Responses:

1. Represents vested shares of restricted stock units granted on February 28, 2025. Restricted stock units convert into common stock on a one-for-one basis.

2. Reflects units surrendered to the Issuer for tax withholding purposes upon the vesting of the restricted stock unit granted on February 28, 2025.

3. The remaining unvested portion of this restricted stock unit award will vest every six months until fully vested on February 25, 2028. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock upon vesting of the unit.

Remarks:

	Kimberly M. O'Brien, attorney in fact	03/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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FAQ

What insider transactions did TETRA Technologies (TTI) CFO Elijio V. Serrano report?

Elijio V. Serrano reported vesting of restricted stock units and related share movements. On February 28, 2026, 38,854 RSUs converted into common stock, and 9,461 shares were surrendered to TETRA Technologies for tax withholding tied to that vesting event.

How many restricted stock units vested for TTI’s CFO on February 28, 2026?

On February 28, 2026, 38,854 restricted stock units vested for TTI’s CFO. These RSUs were granted on February 28, 2025 and converted into 38,854 shares of common stock on a one-for-one basis, reflecting an exercise or conversion of derivative securities.

Did the TTI CFO sell shares on the open market in this Form 4 filing?

The filing shows no open-market sale; it shows tax withholding. Serrano surrendered 9,461 common shares to the issuer at $8.6600 per share to satisfy tax withholding obligations arising from the vesting of restricted stock units granted on February 28, 2025.

What are Elijio V. Serrano’s TTI common stock and RSU holdings after these transactions?

After the reported transactions, Serrano directly held 1,552,408 shares of TTI common stock and 77,710 restricted stock units. Each RSU represents the contingent right to receive one share of common stock when it vests under the award’s schedule.

When will the remaining TTI restricted stock units held by the CFO fully vest?

The remaining unvested portion of this restricted stock unit award will vest every six months. According to the filing, the award is scheduled to be fully vested on February 25, 2028, with each vested unit converting into one share of common stock.

What does transaction code M mean in the TTI CFO’s Form 4 filing?

Transaction code M in this filing indicates an exercise or conversion of a derivative security. Here, it reflects restricted stock units converting into common stock on a one-for-one basis as they vested, rather than an open-market purchase of TTI shares by the CFO.