TETRA EVP vests 86,034 RSUs and withholds shares

TETRA Technologies Executive Vice President Matthew Sanderson reported the vesting of 86,034 restricted stock units on March 14, 2026, which converted into an equal number of common shares on a one-for-one basis.

Accepted by SEC EDGAR 03/17/2026 - 04:24 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

TETRA Technologies Executive Vice President Matthew Sanderson reported the vesting of 86,034 restricted stock units on March 14, 2026, which converted into an equal number of common shares on a one-for-one basis. These RSUs were originally granted on March 14, 2025 and are now fully vested with no remaining unvested portion.

Of the vested shares, 38,157 common shares were surrendered back to the company at $8.22 per share to cover tax withholding obligations tied to the vesting. After these transactions, Sanderson directly holds 776,202 shares of TETRA Technologies common stock, and there are no remaining unexercised or unvested units from this specific award.

Insider Trade Summary

86,034 shares exercised/converted

Exercise 3 txns

Insider SANDERSON MATTHEW

Role Executive Vice President

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	86,034	$0.00	$0.00
Exercise	Common Stock	86,034	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	38,157	$8.22	$314K

Holdings After Transaction: Restricted Stock Units — 0 contracts (Direct); Common Stock — 776,202 shares (Direct)

Holdings Before and After: Restricted Stock Units, 86,034 to 0 contracts (Direct); Common Stock, 728,325 to 776,202 shares (Direct)

Footnotes (3)

1. F1. Represents vested shares of restricted stock units granted on March 14, 2025. Restricted stock units convert into common stock on a one-for-one basis.
2. F2. Reflects units surrendered to the Issuer for tax withholding purposes upon the vesting of the restricted stock unit granted on March 14, 2025.
3. F3. There is no remaining unvested portion of this restricted stock unit award.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did TETRA Technologies (TTI) EVP Matthew Sanderson report?

Matthew Sanderson reported the vesting and conversion of 86,034 restricted stock units into common stock. This reflects a scheduled equity award maturing into shares, rather than an open-market purchase or sale, and updates his direct ownership position in TETRA Technologies.

How many TETRA Technologies shares were used for tax withholding in this Form 4?

Sanderson surrendered 38,157 common shares at $8.22 per share for tax withholding. This tax-withholding disposition occurs when vested equity is partially delivered back to the company to satisfy tax obligations triggered by the RSU vesting event.

How many TETRA Technologies shares does Matthew Sanderson hold after this transaction?

Following the RSU vesting and related tax withholding, Sanderson directly holds 776,202 shares of TETRA Technologies common stock. This figure represents his updated post-transaction ownership position as disclosed, giving investors a clearer picture of his ongoing equity stake.

Were the vested TETRA Technologies restricted stock units fully exhausted in this award?

Yes. The footnotes state there is no remaining unvested portion of this restricted stock unit award. All 86,034 RSUs granted on March 14, 2025 vested and converted into common stock, completing the lifecycle of this particular equity grant.

Did Matthew Sanderson buy or sell TETRA Technologies shares on the open market?

No open-market buy or sell is reported. The filing shows RSU vesting and conversion, plus shares surrendered for tax withholding. These are compensation and tax events, not discretionary market trades, and therefore carry a different informational signal than open-market purchases or sales.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

SANDERSON MATTHEW

(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)
	Executive Vice President

3. Date of Earliest Transaction (Month/Day/Year)
03/14/2026

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	03/14/2026		M(1)		86,034	A	$0.00	814,359	D
Common Stock	03/14/2026		F(2)		38,157	D	$8.22	776,202	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	03/14/2026		M(1)			86,034	(3)	(3)	Common Stock	86,034	$0.00	0.00	D

Explanation of Responses:

1. Represents vested shares of restricted stock units granted on March 14, 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 March 14, 2025.

3. There is no remaining unvested portion of this restricted stock unit award.

Remarks:

	Kimberly M. O'Brien, attorney in fact	03/17/2026
	** 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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.