Michael A Lewis sold $29K of NPKI stock

Michael A Lewis, Dir of NPK International Inc. (NPKI), sold 2,013 shares of NPKI stock worth $29K, per an SEC Form 4 filed Aug 19, 2026.

The sale was pre-arranged (a 10b5-1 plan or an option exercise), not a fresh decision.

The trade happened on Aug 17, 2026, 2 days before it was made public.

NPKI has moved -37.7% since the trade date, from $14.32 to $8.93 (Nov 9, 2026 close).