SANDERSON MATTHEW 4

4 · TETRA TECHNOLOGIES INC · Filed Feb 27, 2026

AI-generated summary of this filing

Updated Feb 28, 2026

Tetra (TTI) EVP Matthew Sanderson Vests RSUs, Surrenders Shares

What Happened

Matthew Sanderson, Executive Vice President of Tetra Technologies (TTI), had restricted stock units (RSUs) vest on Feb 25, 2026. Two awards converted into a total of 31,066 shares (15,942 and 15,124 shares) at an exercise/conversion price of $0.00.
To cover tax withholding on the vesting, Sanderson surrendered 7,950 and 6,353 shares (total 14,303 shares) at $11.14 per share, producing withholding value of $88,563 and $70,772 respectively (combined ≈ $159,335). Net shares retained after withholding: 16,763.
These entries are recorded as derivative exercises/conversions (code M) and tax-withholding disposals (code F). This was a routine vesting/tax-withholding event, not an open-market sale for investment purposes.

Key Details

Transaction date: 2026-02-25; Filing date: 2026-02-27 (Form 4 filed timely).
Exercise/conversion: 15,942 and 15,124 RSUs → 31,066 shares at $0.00 (codes M).
Tax withholding: 7,950 shares ($88,563) and 6,353 shares ($70,772) surrendered at $11.14 (code F); total ≈ $159,335.
Net new shares received: 16,763.
Shares owned after transaction: Not disclosed in the provided filing excerpt.
Notable footnotes:
- F1/F3: These were vested RSUs (one grant dated Feb 22, 2023; another Feb 19, 2024).
- F2/F4: Units surrendered to issuer for tax withholding upon vesting.
- F5: The 2023 award has no remaining unvested portion.
- F6: The remaining portion of the 2024 award vests every six months, fully vesting by Feb 25, 2027.

Context

This was a vesting-and-withholding event (common for executives receiving RSUs). The RSUs converted to shares at no exercise cost; shares were withheld/surrendered to satisfy tax obligations rather than sold on the open market. Such withholding transactions are routine and typically do not signal a change in confidence or a directional bet by the insider.

Form 4

Period: 2026-02-25

Executive Vice President

Transactions

Exercise/Conversion
Common Stock
[F1]
2026-02-25+15,942→ 711,288 total
Tax Payment
Common Stock
[F2]
2026-02-25$11.14/sh−7,950$88,563→ 703,338 total
Exercise/Conversion
Common Stock
[F3]
2026-02-25+15,124→ 718,462 total
Tax Payment
Common Stock
[F4]
2026-02-25$11.14/sh−6,353$70,772→ 712,109 total
Exercise/Conversion
Restricted Stock Units
[F1][F5]
2026-02-25−15,942→ 0 total
Exercise: $0.00→ Common Stock (15,942 underlying)
Exercise/Conversion
Restricted Stock Units
[F3][F6]
2026-02-25−15,124→ 30,249 total
Exercise: $0.00→ Common Stock (15,124 underlying)

Footnotes (6)

[F1]Represents vested shares of restricted stock units granted on February 22, 2023. Restricted stock units convert into common stock on a one-for-one basis.
[F2]Reflects units surrendered to the Issuer for tax withholding purposes upon the vesting of the restricted stock unit granted on February 22, 2023.
[F3]Represents vested shares of restricted stock units granted on February 19, 2024. Restricted stock units convert into common stock on a one-for-one basis.
[F4]Reflects units surrendered to the Issuer for tax withholding purposes upon the vesting of the restricted stock unit granted on February 19, 2024.
[F5]There is no remaining unvested portion of this restricted stock unit award.
[F6]The remaining unvested portion of this restricted stock unit award will vest every six months until fully vested on February 25, 2027. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock upon vesting of the unit.

Signature

Kimberly M. O'Brien, attorney in fact|2026-02-27

1 file