NPKI insider buying and SEC filings, explained
NPK International Inc. · CIK 71829
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$139K
Insiders who bought
1
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$5.6M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Nov 2, 2026 | Open-market purchase | John C. Minge (Director) bought 15,000 shares at about $9.24 ($139K) in an open-market purchase. Holdings up 6% to 268,942 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 3, 2026, 7:55 PM ET |
| Sep 9, 2026 | Planned (10b5-1) | Matthew James Warren (Chief Accounting Officer) sold 2,991 shares at about $13.41 ($40K), marked as a 10b5-1 plan trade. Holdings down 5% to 51,439 shares. | SEC filing Filed Sep 10, 2026 |
| Aug 27, 2026 | Planned (10b5-1) | Rose M. Robeson (Director) sold 10,000 shares at about $13.49 ($135K), marked as a 10b5-1 plan trade. Holdings down 4% to 215,147 shares. | SEC filing Filed Aug 31, 2026 |
| Aug 17, 2026 | Planned (10b5-1) | Michael A Lewis (Director) sold 2,013 shares at about $14.26 ($29K), marked as a 10b5-1 plan trade. Holdings down 1% to 135,865 shares. | SEC filing Filed Aug 19, 2026 |
| Jun 8, 2026 | Planned (10b5-1) | Lori Briggs (President / COO) sold 8,325 shares at about $14.75 ($123K), marked as a 10b5-1 plan trade. Holdings down 3% to 247,165 shares. | SEC filing Filed Jun 9, 2026 |
| Jun 3, 2026 | Planned (10b5-1) | Matthew Lanigan (CEO and Director) sold 167,375 shares at about $14.43 ($2.4M), marked as a 10b5-1 plan trade. Holdings down 40% to 254,699 shares. | SEC filing Filed Jun 5, 2026 |
| Jun 2, 2026 | Planned (10b5-1) | Lori Briggs (President / COO) sold 10,446 shares at about $14.58 ($152K), marked as a 10b5-1 plan trade. Holdings down 4% to 255,490 shares. | SEC filing Filed Jun 3, 2026 |
| May 15, 2026 | Planned (10b5-1) | Michael A Lewis (Director) sold 2,013 shares at about $15.30 ($31K), marked as a 10b5-1 plan trade. Holdings down 2% to 129,320 shares. | SEC filing Filed May 19, 2026 |
| Apr 9, 2026 | Planned (10b5-1) | Gregg Piontek (CFO) sold 15,000 shares at about $15.05 ($226K), marked as a 10b5-1 plan trade. Holdings down 2% to 819,326 shares. | SEC filing Filed Apr 10, 2026 |
| Apr 1, 2026 | Planned (10b5-1) | Gregg Piontek (CFO) sold 35,000 shares at about $14.51 ($508K), marked as a 10b5-1 plan trade. Holdings down 4% to 834,326 shares. | SEC filing Filed Apr 3, 2026 |
| Mar 25, 2026 | Planned (10b5-1) | Gregg Piontek (CFO) sold 15,000 shares at about $15.03 ($225K), marked as a 10b5-1 plan trade. Holdings down 2% to 869,326 shares. | SEC filing Filed Mar 26, 2026 |
| Mar 16, 2026 | Planned (10b5-1) | Mary Celeste Fruge (VP, General Counsel) sold 1,000 shares at $13.56 ($14K), marked as a 10b5-1 plan trade. Holdings down <1% to 265,213 shares. | SEC filing Filed Mar 18, 2026 |
| Mar 6, 2026 | Planned (10b5-1) | Mary Celeste Fruge (VP, General Counsel) sold 11,193 shares at about $13.34 ($149K), marked as a 10b5-1 plan trade. Holdings down 4% to 265,213 shares. | SEC filing Filed Mar 10, 2026 |
| Mar 4, 2026 | Planned (10b5-1) | Gregg Piontek (CFO) sold 108,590 shares at about $14.07 ($1.5M), marked as a 10b5-1 plan trade. Holdings down 11% to 884,326 shares. | SEC filing Filed Mar 5, 2026 |
| Feb 23, 2026 | Planned (10b5-1) | Michael A Lewis (Director) sold 2,013 shares at about $14.31 ($29K), marked as a 10b5-1 plan trade. Holdings down 2% to 131,333 shares. | SEC filing Filed Feb 25, 2026 |
| Nov 24, 2025 | Planned (10b5-1) | Michael A Lewis (Director) sold 2,013 shares at about $12.00 ($24K), marked as a 10b5-1 plan trade. Holdings down 1% to 133,346 shares. | SEC filing Filed Nov 25, 2025 |
20 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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