McMahon Robert W. 4

What Happened

• Robert W. McMahon, CFO of West Pharmaceutical Services (WST), had 4,230.525 restricted stock units (RSUs) convert into common shares on Feb 11, 2026. To cover tax withholding, 1,250.034 of those shares were surrendered at an average withholding price of $246.16 per share, for a tax liability of $307,708. Net shares delivered to McMahon were about 2,980.491 shares.
• This was a routine vesting/tax-withholding event (not an open-market purchase or directional sale).

Key Details

• Transaction date: 2026-02-11 (reported on Form 4 filed 2026-02-12).
• Conversion/vesting: 4,230.525 RSUs converted to common stock (transaction code M).
• Tax withholding: 1,250.034 shares withheld (transaction code F) at $246.16 = $307,708.
• Net shares received: ~2,980.491 shares.
• Footnotes: F1 — RSUs convert one-for-one into common stock. F2 — These RSUs were part of a 12,670-RSU grant on Aug 11, 2025 that vests in installments (4,223; 6,335; 2,112).
• Filing timeliness: Reported the next day (timely under Form 4 rules). No 10b5-1 plan or late filing indicated.

Context

• This is a standard vesting event with shares withheld to satisfy tax obligations (common practice). The M codes reflect conversion/exercise of the derivative (RSU) into shares; the F code reflects shares surrendered/withheld for taxes. Such transactions typically do not by themselves indicate an insider buying or selling for investment reasons.