NPK INTERNATIONAL INC (NPKI) — insider trading
Industrials · NYSE
NPK INTERNATIONAL INC (NPKI) has 39 reported SEC Form 4 insider transactions in our data, including 7 open-market sales among the most recent 39 (latest 2026-09-22).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-22 | Barton III Alvin James | Officer (EVP Commercial Growth & Ops.) | Grant / award / vesting | 12,850 | — | $0 | Form 4 |
| 2026-09-09 | Warren Matthew James | Officer (Chief Accounting Officer) | Open-market sale | 2,991 | $13.41 | $40.1K | Form 4 |
| 2026-08-27 | ROBESON ROSE M | Director | Open-market sale | 10,000 | $13.49 | $134.9K | Form 4 |
| 2026-08-17 | Lewis Michael A | Director | Open-market sale | 2,013 | $14.26 | $28.7K | Form 4 |
| 2026-07-28 | Pederson Kristen J. | Director | Grant / award / vesting | 6,614 | — | $0 | Form 4 |
| 2026-06-08 | Briggs Lori | Officer (VP & President, Ind. Solutions) | Open-market sale | 8,325 | $14.75 | $122.8K | Form 4 |
| 2026-06-03 | LANIGAN MATTHEW | Director, Officer (President & CEO) | Open-market sale | 167,375 | $14.43 | $2.42M | Form 4 |
| 2026-06-02 | Briggs Lori | Officer (VP & President, Ind. Solutions) | Open-market sale | 10,446 | $14.58 | $152.3K | Form 4 |
| 2026-06-01 | Briggs Lori | Officer (VP & President, Ind. Solutions) | Option exercise / conversion (derivative) | 24,340 | — | $0 | Form 4 |
| 2026-06-01 | Briggs Lori | Officer (VP & President, Ind. Solutions) | Option exercise / conversion | 24,340 | — | $0 | Form 4 |
| 2026-06-01 | Briggs Lori | Officer (VP & President, Ind. Solutions) | Shares withheld for taxes / exercise cost | 6,777 | $14.31 | $97.0K | Form 4 |
| 2026-06-01 | Briggs Lori | Officer (VP & President, Ind. Solutions) | Shares withheld for taxes / exercise cost | 9,577 | $14.31 | $137.0K | Form 4 |
| 2026-06-01 | Briggs Lori | Officer (VP & President, Ind. Solutions) | Shares withheld for taxes / exercise cost | 5,401 | $14.31 | $77.3K | Form 4 |
| 2026-06-01 | Piontek Gregg | Officer (Senior Vice President and CFO) | Option exercise / conversion (derivative) | 40,379 | — | $0 | Form 4 |
| 2026-06-01 | Piontek Gregg | Officer (Senior Vice President and CFO) | Option exercise / conversion | 40,379 | — | $0 | Form 4 |
| 2026-06-01 | Piontek Gregg | Officer (Senior Vice President and CFO) | Shares withheld for taxes / exercise cost | 11,241 | $14.31 | $160.9K | Form 4 |
| 2026-06-01 | Piontek Gregg | Officer (Senior Vice President and CFO) | Shares withheld for taxes / exercise cost | 15,889 | $14.31 | $227.4K | Form 4 |
| 2026-06-01 | Piontek Gregg | Officer (Senior Vice President and CFO) | Shares withheld for taxes / exercise cost | 8,959 | $14.31 | $128.2K | Form 4 |
| 2026-06-01 | LANIGAN MATTHEW | Director, Officer (President & CEO) | Option exercise / conversion (derivative) | 100,188 | — | $0 | Form 4 |
| 2026-06-01 | LANIGAN MATTHEW | Director, Officer (President & CEO) | Option exercise / conversion | 100,188 | — | $0 | Form 4 |
| 2026-06-01 | LANIGAN MATTHEW | Director, Officer (President & CEO) | Shares withheld for taxes / exercise cost | 39,423 | $14.31 | $564.1K | Form 4 |
| 2026-06-01 | LANIGAN MATTHEW | Director, Officer (President & CEO) | Shares withheld for taxes / exercise cost | 27,894 | $14.31 | $399.2K | Form 4 |
| 2026-06-01 | LANIGAN MATTHEW | Director, Officer (President & CEO) | Shares withheld for taxes / exercise cost | 22,232 | $14.31 | $318.1K | Form 4 |
| 2026-06-01 | Fruge Mary Celeste | Officer (VP, General Counsel) | Option exercise / conversion (derivative) | 17,274 | — | $0 | Form 4 |
| 2026-06-01 | Fruge Mary Celeste | Officer (VP, General Counsel) | Option exercise / conversion | 17,274 | — | $0 | Form 4 |
| 2026-06-01 | Fruge Mary Celeste | Officer (VP, General Counsel) | Shares withheld for taxes / exercise cost | 6,797 | $14.31 | $97.3K | Form 4 |
| 2026-06-01 | Fruge Mary Celeste | Officer (VP, General Counsel) | Shares withheld for taxes / exercise cost | 5,218 | $14.31 | $74.7K | Form 4 |
| 2026-06-01 | Fruge Mary Celeste | Officer (VP, General Counsel) | Shares withheld for taxes / exercise cost | 3,833 | $14.31 | $54.9K | Form 4 |
| 2026-05-20 | CUTILLO JOSEPH A | Director | Grant / award / vesting | 8,558 | — | $0 | Form 4 |
| 2026-05-20 | LARSON RODERICK A. | Director | Grant / award / vesting | 8,558 | — | $0 | Form 4 |
| 2026-05-20 | Lewis Michael A | Director | Grant / award / vesting | 8,558 | — | $0 | Form 4 |
| 2026-05-20 | Meer Claudia Michel | Director | Grant / award / vesting | 8,558 | — | $0 | Form 4 |
| 2026-05-20 | MINGE JOHN C | Director | Grant / award / vesting | 8,558 | — | $0 | Form 4 |
| 2026-05-20 | ROBESON ROSE M | Director | Grant / award / vesting | 10,862 | — | $0 | Form 4 |
| 2026-05-19 | Briggs Lori | Officer (VP & President, Ind. Solutions) | Grant / award / vesting | 20,838 | — | $0 | Form 4 |
| 2026-05-19 | Fruge Mary Celeste | Officer (VP, General Counsel) | Grant / award / vesting | 18,002 | — | $0 | Form 4 |
| 2026-05-19 | LANIGAN MATTHEW | Director, Officer (President & CEO) | Grant / award / vesting | 85,771 | — | $0 | Form 4 |
| 2026-05-19 | Piontek Gregg | Officer (Senior Vice President and CFO) | Grant / award / vesting | 34,566 | — | $0 | Form 4 |
| 2026-05-15 | Lewis Michael A | Director | Open-market sale | 2,013 | $15.30 | $30.8K | Form 4 |
Ask the chat about NPKI's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: NPK INTERNATIONAL INC (NPKI).
Last updated 2026-09-22 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.