NPKI insider transaction filings
NPK International Inc. — 50 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-09-10. Screen NPKI transaction legs live →
Insider transaction summary — last 90 days
2026-06-24 to 2026-09-22, from the filings listed below: 4 Form 4 filings. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 3 legs across 3 filings by 3 insiders — 15,004 shares, $203,735 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 1.
- Largest priced transaction: sale of 10,000 shares @ $13.49 ($134,917) by ROBESON ROSE M, filed 2026-08-31.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Insider | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|
| ROBESON ROSE M — Director | 1 | — | 1 leg · 10,000 sh · $134,917 | — |
| Warren Matthew James — Chief Accounting Officer | 1 | — | 1 leg · 2,991 sh · $40,113 | — |
| Lewis Michael A — Director | 1 | — | 1 leg · 2,013 sh · $28,705 | — |
| Pederson Kristen J. — Director | 1 | — | — | 1 |
Recent Form 4 filings — NPK International Inc.
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-10 | 4 | Warren Matthew James — Chief Accounting Officer | Sale (S): 2,991 @ $13.41 | EDGAR |
| 2026-08-31 | 4 | ROBESON ROSE M — Director | Sale (S): 10,000 @ $13.49 | EDGAR |
| 2026-08-19 | 4 | Lewis Michael A — Director | Sale (S): 2,013 @ $14.26 | EDGAR |
| 2026-07-29 | 4 | Pederson Kristen J. — Director | Grant/award (A): 6,614 @ $0 | EDGAR |
| 2026-06-09 | 4 | Briggs Lori — VP & President, Ind. Solutions | Sale (S): 8,325 @ $14.75 | EDGAR |
| 2026-06-05 | 4 | LANIGAN MATTHEW — President & CEO, Director | Sale (S): 167,375 @ $14.43 | EDGAR |
| 2026-06-03 | 4 | Fruge Mary Celeste — VP, General Counsel | Tax withholding (F): 3,833 @ $14.31 · Tax withholding (F): 5,218 @ $14.31 · Tax withholding (F): 6,797 @ $14.31 · Option exercise (M): 17,274 @ $0 · Option exercise (M): 17,274 (derivative) @ $0 | EDGAR |
| 2026-06-03 | 4 | Briggs Lori — VP & President, Ind. Solutions | Tax withholding (F): 5,401 @ $14.31 · Tax withholding (F): 9,577 @ $14.31 · Tax withholding (F): 6,777 @ $14.31 · Option exercise (M): 24,340 @ $0 · Sale (S): 10,446 @ $14.58 · Option exercise (M): 24,340 (derivative) @ $0 | EDGAR |
| 2026-06-03 | 4 | LANIGAN MATTHEW — President & CEO, Director | Tax withholding (F): 22,232 @ $14.31 · Tax withholding (F): 27,894 @ $14.31 · Tax withholding (F): 39,423 @ $14.31 · Option exercise (M): 100,188 @ $0 · Option exercise (M): 100,188 (derivative) @ $0 | EDGAR |
| 2026-06-03 | 4 | Piontek Gregg — Senior Vice President and CFO | Tax withholding (F): 8,959 @ $14.31 · Tax withholding (F): 15,889 @ $14.31 · Tax withholding (F): 11,241 @ $14.31 · Option exercise (M): 40,379 @ $0 · Option exercise (M): 40,379 (derivative) @ $0 | EDGAR |
| 2026-05-21 | 4 | Fruge Mary Celeste — VP, General Counsel | Grant/award (A): 18,002 @ $0 | EDGAR |
| 2026-05-21 | 4 | Briggs Lori — VP & President, Ind. Solutions | Grant/award (A): 20,838 @ $0 | EDGAR |
| 2026-05-21 | 4 | Meer Claudia Michel — Director | Grant/award (A): 8,558 @ $0 | EDGAR |
| 2026-05-21 | 4 | MINGE JOHN C — Director | Grant/award (A): 8,558 @ $0 | EDGAR |
| 2026-05-21 | 4 | LANIGAN MATTHEW — President & CEO, Director | Grant/award (A): 85,771 @ $0 | EDGAR |
| 2026-05-21 | 4 | CUTILLO JOSEPH A — Director | Grant/award (A): 8,558 @ $0 | EDGAR |
| 2026-05-21 | 4 | LARSON RODERICK A. — Director | Grant/award (A): 8,558 @ $0 | EDGAR |
| 2026-05-21 | 4 | Lewis Michael A — Director | Grant/award (A): 8,558 @ $0 | EDGAR |
| 2026-05-21 | 4 | Piontek Gregg — Senior Vice President and CFO | Grant/award (A): 34,566 @ $0 | EDGAR |
| 2026-05-21 | 4 | ROBESON ROSE M — Director | Grant/award (A): 10,862 @ $0 | EDGAR |
| 2026-05-19 | 4 | Lewis Michael A — Director | Sale (S): 2,013 @ $15.30 | EDGAR |
| 2026-04-10 | 4 | Piontek Gregg — Senior Vice President and CFO | Sale (S): 15,000 @ $15.04 | EDGAR |
| 2026-04-03 | 4 | Piontek Gregg — Senior Vice President and CFO | Sale (S): 35,000 @ $14.51 | EDGAR |
| 2026-03-26 | 4 | Piontek Gregg — Senior Vice President and CFO | Sale (S): 15,000 @ $15.03 | EDGAR |
| 2026-03-18 | 4 | Fruge Mary Celeste — VP, General Counsel | Option exercise (M): 1,000 @ $4.32 · Sale (S): 1,000 @ $13.56 · Option exercise (M): 1,000 (derivative) @ $0 | EDGAR |
| 2026-03-10 | 4 | Fruge Mary Celeste — VP, General Counsel | Option exercise (M): 11,193 @ $4.32 · Sale (S): 11,193 @ $13.34 · Option exercise (M): 11,193 (derivative) @ $0 | EDGAR |
| 2026-03-05 | 4 | Piontek Gregg — Senior Vice President and CFO | Option exercise (M): 73,590 @ $4.32 · Sale (S): 73,590 @ $14.10 · Sale (S): 35,000 @ $14.02 · Option exercise (M): 73,590 (derivative) @ $0 | EDGAR |
| 2026-02-25 | 4 | Lewis Michael A — Director | Sale (S): 2,013 @ $14.31 | EDGAR |
| 2026-01-21 | 4/A | Fruge Mary Celeste — VP, General Counsel | Option exercise (M): 17,274 @ $0 · Option exercise (M): 17,274 (derivative) @ $0 | EDGAR |
| 2025-11-25 | 4 | Lewis Michael A — Director | Sale (S): 2,013 @ $12.00 | EDGAR |
| 2025-10-06 | 4 | LANIGAN MATTHEW — President & CEO, Director | Gift (G): 770,249 @ $0 | EDGAR |
| 2025-10-03 | 4 | Briggs Lori — VP & President, Ind. Solutions | Sale (S): 10,108 @ $11.51 | EDGAR |
| 2025-09-04 | 4 | LANIGAN MATTHEW — President & CEO, Director | Option exercise (M): 1,000 @ $4.32 · Sale (S): 1,000 @ $10.38 · Option exercise (M): 1,000 (derivative) @ $10.38 | EDGAR |
| 2025-08-26 | 4 | LANIGAN MATTHEW — President & CEO, Director | Option exercise (M): 68,896 @ $4.32 · Sale (S): 68,896 @ $10.34 · Option exercise (M): 68,896 (derivative) @ $10.34 | EDGAR |
| 2025-08-26 | 4 | Lewis Michael A — Director | Sale (S): 2,013 @ $10.33 | EDGAR |
| 2025-08-12 | 4 | Briggs Lori — VP & President, Ind. Solutions | Sale (S): 8,005 @ $9.51 | EDGAR |
| 2025-07-10 | 4 | Briggs Lori — VP & President, Ind. Solutions | Sale (S): 8,005 @ $8.57 | EDGAR |
| 2025-06-17 | 4 | WHITE DOUGLAS L — VP, CAO & Treasurer | Grant/award (A): 730 @ $6.51 | EDGAR |
| 2025-06-17 | 4 | Lewis Michael A — Director | Sale (S): 2,013 @ $8.60 | EDGAR |
| 2025-06-10 | 4 | Briggs Lori — VP & President, Ind. Solutions | Sale (S): 9,704 @ $8.38 | EDGAR |
| 2025-06-03 | 4 | Fruge Mary Celeste — VP, General Counsel | Tax withholding (F): 6,797 @ $8.09 · Tax withholding (F): 6,820 @ $8.09 · Tax withholding (F): 3,833 @ $8.09 · Option exercise (M): 17,247 @ $0 · Option exercise (M): 17,247 (derivative) @ $0 | EDGAR |
| 2025-06-03 | 4 | Briggs Lori — VP & President, Ind. Solutions | Option exercise (M): 26,396 @ $0 · Option exercise (M): 24,340 @ $0 · Tax withholding (F): 5,401 @ $8.09 · Tax withholding (F): 9,577 @ $8.09 · Tax withholding (F): 10,386 @ $8.09 · Option exercise (M): 26,396 (derivative) @ $0 · +1 more | EDGAR |
| 2025-06-03 | 4 | LANIGAN MATTHEW — President & CEO, Director | Option exercise (M): 108,651 @ $0 · Option exercise (M): 100,188 @ $0 · Tax withholding (F): 22,232 @ $8.09 · Tax withholding (F): 39,423 @ $8.09 · Tax withholding (F): 42,754 @ $8.09 · Option exercise (M): 108,651 (derivative) @ $0 · +1 more | EDGAR |
| 2025-06-03 | 4 | WHITE DOUGLAS L — VP, CAO & Treasurer | Option exercise (M): 17,333 @ $0 · Option exercise (M): 14,667 @ $0 · Tax withholding (F): 3,122 @ $8.09 · Tax withholding (F): 6,820 @ $8.09 · Tax withholding (F): 5,771 @ $8.09 · Option exercise (M): 17,333 (derivative) @ $0 · +1 more | EDGAR |
| 2025-06-03 | 4 | Piontek Gregg — Senior Vice President and CFO | Option exercise (M): 43,790 @ $0 · Tax withholding (F): 17,231 @ $8.09 · Tax withholding (F): 15,889 @ $8.09 · Tax withholding (F): 8,959 @ $8.09 · Option exercise (M): 40,379 @ $0 · Option exercise (M): 43,790 (derivative) @ $0 · +1 more | EDGAR |
| 2025-05-20 | 4 | Meer Claudia Michel — Director | Purchase (P): 4,000 @ $7.92 | EDGAR |
| 2025-05-19 | 4 | CUTILLO JOSEPH A — Director | Grant/award (A): 15,097 @ $0 | EDGAR |
| 2025-05-19 | 4 | LARSON RODERICK A. — Director | Grant/award (A): 15,097 @ $0 | EDGAR |
| 2025-05-19 | 4 | Lewis Michael A — Director | Grant/award (A): 15,097 @ $0 | EDGAR |
| 2025-05-19 | 4 | ROBESON ROSE M — Director | Grant/award (A): 18,720 @ $0 | EDGAR |
Recent 8-K events — NPK International Inc.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-09-14 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-09-02 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-07-30 | 8-K | 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-07-29 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-07-28 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-20 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-01 | 8-K | 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-04-30 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-02-26 | 8-K | 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-02-25 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
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