ODONNELL JOHN A 4

What Happened

• John A. O'Donnell, a director of Cactus, Inc. (WHD), reported RSU activity on March 10, 2026. A prior grant of 2,524 restricted stock units vested and converted into 2,524 shares; those 2,524 shares were immediately disposed of (reported at $0.00), consistent with share withholding to cover taxes. On the same day he received a new grant of 2,559 restricted stock units (reported at $0.00) that will vest on the first anniversary of the grant.

Key Details

• Transaction date: 2026-03-10.
• Vesting/conversion: 2,524 RSUs converted to 2,524 shares and 2,524 shares were immediately withheld/disposed (reported at $0.00).
• New grant: 2,559 RSUs granted on 2026-03-10, vesting one year later (reported at $0.00).
• Shares owned after the transaction: not specified in this filing.
• Footnotes: F1 explains RSUs convert 1-for-1 into Class A common stock upon vesting; F2 documents the new 2,559 RSU grant with one-year vest; F3 documents the original 2,524 RSU grant from 3/10/2025 that vested.
• Filing timeliness: Reported on 2026-03-12 for a 2026-03-10 transaction — filed within the typical 2-business-day reporting window.

Context

• These entries reflect RSU vesting and a routine tax-withholding action (not an open-market sale). The disposition at $0.00 indicates shares were withheld rather than sold for cash proceeds. The new RSU grant is a forward-looking award that will only convert to shares if it vests in one year.