LANIGAN MATTHEW 4

What Happened

• Matthew Lanigan, President, CEO and a director of NPK International Inc. (NPKI), had 100,188 restricted stock units (RSUs) vest and convert into 100,188 common shares on June 1, 2026. Per the filing, 22,232 + 27,894 + 39,423 = 89,549 shares were withheld to satisfy tax withholding obligations at $14.31 per share, totaling $1,281,446. After withholding, Lanigan retained 10,639 shares. This was an award/vesting event (not an open‑market sale or purchase).

Key Details

• Transaction date: 2026-06-01; Filing date: 2026-06-03 (timely filing).
• Vesting/Conversion: 100,188 RSUs converted to 100,188 shares (derivative conversion at $0.00).
• Shares withheld for taxes (disposition): 89,549 shares at $14.31, total value reported $1,281,446.
• Shares owned after transaction: 10,639.
• Footnotes: RSUs vest and convert 1:1 and settle in shares; the withheld shares reflect tax withholding upon vesting.
• No indication of a 10b5-1 plan or gift; this was a routine tax‑withholding disposition tied to vesting.

Context

• This was a vesting/award event: RSUs converted into shares and a portion was withheld to cover tax obligations (a common practice). That withholding is recorded as a disposition but does not necessarily indicate a voluntary sale for investment reasons.