NPK International Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Lewis Michael A | — | Sale | 2,013 | $12.00 | $24,156 | 133,346 | Nov 24, 2025 |
| LANIGAN MATTHEW | President & CEO | Gift | 770,249 | — | — | 325,664 | Oct 3, 2025 |
| Briggs Lori | VP & President, Ind. Solutions | Sale | 10,108 | $11.51 | $116,343 | 242,513 | Oct 1, 2025 |
| LANIGAN MATTHEW | President & CEO | Sale | 1,000 | $10.38 | $10,380 | 1,095,913 | Sep 3, 2025 |
| Lewis Michael A | — | Sale | 2,013 | $10.33 | $20,794 | 135,359 | Aug 25, 2025 |
| LANIGAN MATTHEW | President & CEO | Option Exercise | 68,896 | $4.32 | $297,631 | 1,164,809 | Aug 22, 2025 |
| Briggs Lori | VP & President, Ind. Solutions | Sale | 8,005 | $9.51 | $76,128 | 252,621 | Aug 11, 2025 |
| Briggs Lori | VP & President, Ind. Solutions | Sale | 8,005 | $8.57 | $68,603 | 260,626 | Jul 9, 2025 |
| Lewis Michael A | — | Sale | 2,013 | $8.60 | $17,312 | 137,372 | Jun 16, 2025 |
| WHITE DOUGLAS L | VP, CAO & Treasurer | Award / Grant | 730 | $6.51 | $4,752 | 305,245 | Jun 14, 2025 |
| Briggs Lori | VP & President, Ind. Solutions | Sale | 9,704 | $8.38 | $81,320 | 268,631 | Jun 6, 2025 |
| WHITE DOUGLAS L | VP, CAO & Treasurer | Tax Withholding | 3,122 | $8.09 | $25,257 | 317,106 | Jun 1, 2025 |
| Briggs Lori | VP & President, Ind. Solutions | Tax Withholding | 10,386 | $8.09 | $84,023 | 278,335 | Jun 1, 2025 |
| LANIGAN MATTHEW | President & CEO | Option Exercise | 108,651 | — | — | 1,100,134 | Jun 1, 2025 |
| Piontek Gregg | Senior Vice President and CFO | Tax Withholding | 17,231 | $8.09 | $139,399 | 903,795 | Jun 1, 2025 |
| Fruge Mary Celeste | VP, General Counsel | Tax Withholding | 6,820 | $8.09 | $55,174 | 251,772 | Jun 1, 2025 |
| Meer Claudia Michel | — | Purchase | 4,000 | $7.92 | $31,680 | 118,135 | May 19, 2025 |
| LARSON RODERICK A. | — | Award / Grant | 15,097 | — | — | 15,097 | May 15, 2025 |
| Young Donald Win | — | Award / Grant | 15,097 | — | — | 310,940 | May 15, 2025 |
| ROBESON ROSE M | — | Award / Grant | 18,720 | — | — | 214,285 | May 15, 2025 |
| MINGE JOHN C | — | Award / Grant | 15,097 | — | — | 245,384 | May 15, 2025 |
| Meer Claudia Michel | — | Award / Grant | 15,097 | — | — | 114,135 | May 15, 2025 |
| Lewis Michael A | — | Award / Grant | 15,097 | — | — | 139,385 | May 15, 2025 |
| CUTILLO JOSEPH A | — | Award / Grant | 15,097 | — | — | 27,597 | May 15, 2025 |
| WHITE DOUGLAS L | VP, CAO & Treasurer | Award / Grant | 29,900 | — | — | 288,228 | May 14, 2025 |
| Piontek Gregg | Senior Vice President and CFO | Award / Grant | 85,706 | — | — | 877,236 | May 14, 2025 |
| LANIGAN MATTHEW | President & CEO | Award / Grant | 212,667 | — | — | 991,483 | May 14, 2025 |
| Fruge Mary Celeste | VP, General Counsel | Award / Grant | 39,783 | — | — | 265,389 | May 14, 2025 |
| Briggs Lori | VP & President, Ind. Solutions | Award / Grant | 51,667 | — | — | 252,963 | May 14, 2025 |
| CUTILLO JOSEPH A | — | Purchase | 12,500 | $8.00 | $100,000 | 12,500 | May 8, 2025 |
| MINGE JOHN C | — | Purchase | 10,000 | $5.38 | $53,800 | 230,287 | Mar 5, 2025 |
| WHITE DOUGLAS L | VP, CAO & Treasurer | Award / Grant | 722 | $6.58 | $4,751 | 258,328 | Dec 13, 2024 |
| LANIGAN MATTHEW | President & CEO | Option Exercise | 33,333 | — | — | 791,932 | Sep 1, 2024 |
| Briggs Lori | VP & President, Ind. Solutions | Option Exercise | 16,666 | — | — | 207,854 | Sep 1, 2024 |
| WHITE DOUGLAS L | VP, CAO & Treasurer | Award / Grant | 841 | $5.98 | $5,029 | 257,606 | Jun 14, 2024 |
| Briggs Lori | VP & President, Ind. Solutions | Award / Grant | 1,378 | $5.98 | $8,240 | 191,188 | Jun 14, 2024 |
| Piontek Gregg | Senior Vice President and CFO | Option Exercise | 51,181 | — | — | 760,619 | Jun 1, 2024 |
| PATERSON DAVID A | VP & President, Fluids Systems | Option Exercise | 35,788 | — | — | 351,567 | Jun 1, 2024 |
| WHITE DOUGLAS L | VP, CAO & Treasurer | Tax Withholding | 3,571 | $8.48 | $30,282 | 265,530 | Jun 1, 2024 |
| LANIGAN MATTHEW | President & CEO | Option Exercise | 37,090 | — | — | 646,531 | Jun 1, 2024 |
| Fruge Mary Celeste | VP, General Counsel | Tax Withholding | 6,820 | $8.48 | $57,834 | 238,699 | Jun 1, 2024 |
| Briggs Lori | VP & President, Ind. Solutions | Tax Withholding | 10,386 | $8.48 | $88,073 | 189,810 | Jun 1, 2024 |
| LARSON RODERICK A. | — | Award / Grant | 16,108 | — | — | 16,108 | May 16, 2024 |
| Young Donald Win | — | Award / Grant | 16,108 | — | — | 295,843 | May 16, 2024 |
| ROBESON ROSE M | — | Award / Grant | 19,974 | — | — | 195,565 | May 16, 2024 |
| MINGE JOHN C | — | Award / Grant | 16,108 | — | — | 220,287 | May 16, 2024 |
| Meer Claudia Michel | — | Award / Grant | 16,108 | — | — | 99,038 | May 16, 2024 |
| Lewis Michael A | — | Award / Grant | 16,108 | — | — | 124,288 | May 16, 2024 |
| WHITE DOUGLAS L | VP, CAO & Treasurer | Award / Grant | 23,800 | — | — | 218,435 | May 15, 2024 |
| Piontek Gregg | Senior Vice President and CFO | Award / Grant | 68,308 | — | — | 709,438 | May 15, 2024 |