Matthew Lanigan
President & CEO at NPK International Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 3 years
- Director since
- 2023
3 years of board service in total across 1 board, counting each seat separately. Longest: NPK International Inc., 3 years.
NPK International Inc.
Director · President & CEO
Chief executive roles
NPK International Inc.
· President & CEO
Dates unknown
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Jun 3, 2026 | NPK International Inc. | Open-market sale | −167,375 | $14.43 | $2,415,221 |
| Jun 1, 2026 | NPK International Inc. | Shares withheld for tax | −22,232 | $14.31 | $318,140 |
| Jun 1, 2026 | NPK International Inc. | Shares withheld for tax | −27,894 | $14.31 | $399,163 |
| Jun 1, 2026 | NPK International Inc. | Shares withheld for tax | −39,423 | $14.31 | $564,143 |
| Jun 1, 2026 | NPK International Inc. | Option exercise | +100,188 | — | — |
| May 19, 2026 | NPK International Inc. | Grant or award | +85,771 | — | — |
| Oct 3, 2025 | NPK International Inc. | Gift | −770,249 | — | — |
| Sep 3, 2025 | NPK International Inc. | Option exercise | +1,000 | $4.32 | $4,320 |
| Sep 3, 2025 | NPK International Inc. | Open-market sale | −1,000 | $10.38 | $10,380 |
| Aug 22, 2025 | NPK International Inc. | Option exercise | +68,896 | $4.32 | $297,631 |
| Aug 22, 2025 | NPK International Inc. | Open-market sale | −68,896 | $10.34 | $712,385 |
| Jun 1, 2025 | NPK International Inc. | Option exercise | +108,651 | — | — |
| Jun 1, 2025 | NPK International Inc. | Option exercise | +100,188 | — | — |
| Jun 1, 2025 | NPK International Inc. | Shares withheld for tax | −22,232 | $8.09 | $179,857 |
| Jun 1, 2025 | NPK International Inc. | Shares withheld for tax | −39,423 | $8.09 | $318,932 |
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