SANDERSON MATTHEW 4

What Happened

• Matthew Sanderson, Executive Vice President of Tetra Technologies (TTI), had 29,141 restricted stock units (RSUs) convert into common shares on February 28, 2026. Of those, 12,925 shares were surrendered to the company to cover tax withholding at $8.66 per share for a withholding value of $111,931. The net shares added to his position were 16,216.

Key Details

• Transaction date: February 28, 2026.
• Conversion: 29,141 RSUs converted into common stock (code M — derivative exercise/conversion).
• Tax withholding: 12,925 shares surrendered at $8.66 per share for $111,931 (code F).
• Net shares received: 16,216 (29,141 converted − 12,925 surrendered).
• Shares owned after transaction: Not specified in this filing.
• Relevant footnotes:
  • F1: These were vested RSUs granted on February 28, 2025 and convert one-for-one to common stock.
  • F2: Units were surrendered to the issuer for tax withholding upon vesting.
  • F3: Remaining unvested RSUs vest every six months and are scheduled to be fully vested by February 25, 2028.
• Filing date: March 2, 2026 — appears to be filed within the usual Form 4 reporting window.

Context

• This was a standard RSU vesting and tax-withholding event, not an open-market sale or purchase. Surrendering shares to cover taxes is routine and does not necessarily indicate a change in the insider’s view of the company. The filing shows conversion of RSUs (a derivative event) and shares withheld for taxes (cashless withholding).