March 4, 2026 · Form 4 insider transaction
Piontek Gregg bought 73,590 shares of NPK INTERNATIONAL INC at $4.32 per share, a transaction worth $317.9K. The trade was recorded as option exercise under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 1 day after the transaction.
The reported exercise of 73,590 options and subsequent sale of the shares acquired upon exercise occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 3, 2025.