Trade Summary

3 days ago, LANIGAN MATTHEW, serving as President & CEO at NPK International Inc. (NPKI), sold 167,375 shares at $14.43 per share, for a total transaction value of $2,415,907.49. Following this transaction, LANIGAN MATTHEW now holds 254,699 shares of NPKI.

This sale represents a 39.66% decrease in LANIGAN MATTHEW's stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Wednesday, June 3, 2026 and publicly disclosed via SEC Form 4 filing on Friday, June 5, 2026 at 4:22 PM ET, 2 days after the trade was made.

NPK International Inc. operates in the ENERGY sector, specifically within the OIL & GAS EQUIPMENT & SERVICES industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.