SEC Form 4 · Updated Daily
NPKI
— NPK INTERNATIONAL INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Howes Paul L | Director · Officer | 1,236,325 | 2021-08-26 | P |
| KAUFMAN ALAN J | Director | 905,292 | 2006-12-13 | S |
| Piontek Gregg | Officer | 858,182 | 2026-06-01 | M |
| COLE JAMES D | Director · Officer | 655,363 | 2005-12-12 | G |
| PATERSON DAVID A | Officer | 410,422 | 2024-06-01 | M |
| Smith Bruce Campbell | Officer | 409,830 | 2019-07-02 | M |
| AIROLA MARK J | Officer | 398,491 | 2018-08-14 | M |
| Young Donald Win | Director | 310,940 | 2025-05-15 | A |
| WHITE DOUGLAS L | Officer | 305,245 | 2025-06-14 | A |
| Fruge Mary Celeste | Officer | 284,641 | 2026-06-01 | M |
| FINLEY G STEPHEN | Director | 275,484 | 2021-05-20 | A |
| LANIGAN MATTHEW | Director · Officer | 254,699 | 2026-06-03 | S |
| MINGE JOHN C | Director | 253,942 | 2026-05-20 | A |
| Briggs Lori | Officer | 247,165 | 2026-06-08 | S |
| McFarland James | Director | 237,928 | 2016-12-08 | M |
| BEST ANTHONY JAMES | Director | 237,809 | 2022-05-19 | A |
| Earle Edward Chipman | Officer | 230,265 | 2022-12-14 | A |
| WARREN GARY L | Director | 226,706 | 2018-05-17 | A |
| Juergens Jeffery L | Officer | 219,365 | 2015-12-21 | F |
| ROBESON ROSE M | Director | 215,147 | 2026-08-27 | S |
| Anderson David C | Director | 150,841 | 2018-05-03 | S |
| Braun James E | Officer | 143,984 | 2011-06-13 | F |
| Lewis Michael A | Director | 135,865 | 2026-08-17 | S |
| Meer Claudia Michel | Director | 126,693 | 2026-05-20 | A |
| BOX JERRY | Director | 125,045 | 2014-04-29 | G |
| Moss William D | Officer | 75,877 | 2011-06-13 | F |
| VOLLANDS PHILLIP T | Officer | 74,833 | 2018-06-01 | M |
| Kendrick Lee Ann | Officer | 59,680 | 2014-06-09 | F |
| Warren Matthew James | Officer | 51,439 | 2026-09-09 | S |
| TUCEI F WALKER JR | Director | 47,000 | 2008-06-11 | A |
| HUNT DAVID P | Director | 46,000 | 2007-03-16 | P |
| BALLANTINE WILLIAM THOMAS | Director · Officer | 36,895 | 2006-02-24 | M |
| CUTILLO JOSEPH A | Director · Officer | 36,155 | 2026-05-20 | A |
| LARSON RODERICK A. | Director · Officer | 23,655 | 2026-05-20 | A |
| Cooper Samuel Lee | Officer | 16,777 | 2009-03-05 | A |
| Barton III Alvin James | Officer | 12,850 | 2026-09-22 | A |
| Pederson Kristen J. | Director | 6,614 | 2026-07-28 | A |
| Wingerter Eric Martin | Officer | 4,243 | 2006-06-07 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-22 | Barton III Alvin James | Grant / award | 12,850 | $0.00 | 12,850 |
| 2026-09-09 | Warren Matthew James | Open-market sale | 2,991 | $13.41 | 51,439 |
| 2026-08-31 | Warren Matthew James | — | — | — | 54,430 |
| 2026-08-27 | ROBESON ROSE M | Open-market sale | 10,000 | $13.49 | 215,147 |
| 2026-08-17 | Lewis Michael A | Open-market sale | 2,013 | $14.26 | 135,865 |
| 2026-07-28 | Pederson Kristen J. | Grant / award | 6,614 | $0.00 | 6,614 |
| 2026-06-08 | Briggs Lori | Open-market sale | 8,325 | $14.75 | 247,165 |
| 2026-06-03 | LANIGAN MATTHEW | Open-market sale | 167,375 | $14.43 | 254,699 |
| 2026-06-02 | Briggs Lori | Open-market sale | 10,446 | $14.58 | 255,490 |
| 2026-06-01 | Briggs Lori | Option exercise (derivative) | 24,340 | $0.00 | 0 |
| 2026-06-01 | Briggs Lori | Option exercise | 24,340 | $0.00 | 265,936 |
| 2026-06-01 | Briggs Lori | Tax withholding | 6,777 | $14.31 | 241,596 |
| 2026-06-01 | Briggs Lori | Tax withholding | 9,577 | $14.31 | 248,373 |
| 2026-06-01 | Briggs Lori | Tax withholding | 5,401 | $14.31 | 257,950 |
| 2026-06-01 | Piontek Gregg | Option exercise (derivative) | 40,379 | $0.00 | 0 |
| 2026-06-01 | Piontek Gregg | Option exercise | 40,379 | $0.00 | 858,182 |
| 2026-06-01 | Piontek Gregg | Tax withholding | 11,241 | $14.31 | 817,803 |
| 2026-06-01 | Piontek Gregg | Tax withholding | 15,889 | $14.31 | 829,044 |
| 2026-06-01 | Piontek Gregg | Tax withholding | 8,959 | $14.31 | 844,933 |
| 2026-06-01 | LANIGAN MATTHEW | Option exercise (derivative) | 100,188 | $0.00 | 0 |
| 2026-06-01 | LANIGAN MATTHEW | Option exercise | 100,188 | $0.00 | 422,074 |
| 2026-06-01 | LANIGAN MATTHEW | Tax withholding | 39,423 | $14.31 | 321,886 |
| 2026-06-01 | LANIGAN MATTHEW | Tax withholding | 27,894 | $14.31 | 361,309 |
| 2026-06-01 | LANIGAN MATTHEW | Tax withholding | 22,232 | $14.31 | 389,203 |
| 2026-06-01 | Fruge Mary Celeste | Option exercise (derivative) | 17,274 | $0.00 | 0 |
| 2026-06-01 | Fruge Mary Celeste | Option exercise | 17,274 | $0.00 | 284,641 |
| 2026-06-01 | Fruge Mary Celeste | Tax withholding | 6,797 | $14.31 | 267,367 |
| 2026-06-01 | Fruge Mary Celeste | Tax withholding | 5,218 | $14.31 | 274,164 |
| 2026-06-01 | Fruge Mary Celeste | Tax withholding | 3,833 | $14.31 | 279,382 |
| 2026-05-20 | CUTILLO JOSEPH A | Grant / award | 8,558 | $0.00 | 36,155 |
| 2026-05-20 | LARSON RODERICK A. | Grant / award | 8,558 | $0.00 | 23,655 |
| 2026-05-20 | Lewis Michael A | Grant / award | 8,558 | $0.00 | 137,878 |
| 2026-05-20 | Meer Claudia Michel | Grant / award | 8,558 | $0.00 | 126,693 |
| 2026-05-20 | MINGE JOHN C | Grant / award | 8,558 | $0.00 | 253,942 |
| 2026-05-20 | ROBESON ROSE M | Grant / award | 10,862 | $0.00 | 225,147 |
| 2026-05-19 | Briggs Lori | Grant / award | 20,838 | $0.00 | 263,351 |
| 2026-05-19 | Fruge Mary Celeste | Grant / award | 18,002 | $0.00 | 283,215 |
| 2026-05-19 | LANIGAN MATTHEW | Grant / award | 85,771 | $0.00 | 411,435 |
| 2026-05-19 | Piontek Gregg | Grant / award | 34,566 | $0.00 | 853,892 |
| 2026-05-15 | Lewis Michael A | Open-market sale | 2,013 | $15.30 | 129,320 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.