NPK International
Rents and sells recyclable composite mats for temporary worksite access.
$13.17
After-hours close+0.01 (+0.08%)
At close$13.16(−2.88%)
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Breakdown13F · Form 4
Institutions —Insiders 3.55%
Shares outstanding 84.91M · Float 80.53M · 94.9% free float
Institutions13F
No 13F holders on record.
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Ameriprise Financial, Inc. | 6.20% | 5.25M | 13G | Nov 14, 2025 ↗ |
| Vanguard Capital Management | 5.01% | 4.24M | 13G | Jul 31, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Gregg Piontek | officer: Senior Vice President and CFO | 817.8K | 0.96% | Jun 3, 2026 |
| Donald Win Young | director | 310.9K | 0.37% | May 19, 2025 |
| Douglas L. White | officer: VP, CAO & Treasurer | 305.2K | 0.36% | Jun 17, 2025 |
| Mary Celeste Fruge | officer: VP, General Counsel | 267.4K | 0.31% | Jun 3, 2026 |
| Matthew Lanigan | director, officer: President & CEO | 254.7K | 0.30% | Jun 5, 2026 |
| John C. Minge | director | 253.9K | 0.30% | May 21, 2026 |
| Lori Briggs | officer: VP & President, Ind. Solutions | 247.2K | 0.29% | Jun 9, 2026 |
| Rose M. Robeson | director | 225.1K | 0.27% | May 21, 2026 |
| Michael A. Lewis | director | 135.9K | 0.16% | Aug 19, 2026 |
| Claudia Michel Meer | director | 126.7K | 0.15% | May 21, 2026 |
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 17, 2026 | Michael A. Lewisdirector | Sale | 2,013 | $14.26 | 135,865 |
| Jun 8, 2026 | Lori Briggsofficer: VP & President, Ind. Solutions | Sale | 8,325 | $14.75 | 247,165 |
| Jun 3, 2026 | Matthew Lanigandirector, officer: President & CEO | Sale | 167,375 | $14.43 | 254,699 |
| Jun 2, 2026 | Lori Briggsofficer: VP & President, Ind. Solutions | Sale | 10,446 | $14.58 | 255,490 |
| May 15, 2026 | Michael A. Lewisdirector | Sale | 2,013 | $15.30 | 129,320 |
| Apr 9, 2026 | Gregg Piontekofficer: Senior Vice President and CFO | Sale | 15,000 | $15.05 | 819,326 |
| Apr 1, 2026 | Gregg Piontekofficer: Senior Vice President and CFO | Sale | 35,000 | $14.51 | 834,326 |
| Mar 25, 2026 | Gregg Piontekofficer: Senior Vice President and CFO | Sale | 15,000 | $15.03 | 869,326 |
| Mar 16, 2026 | Mary Celeste Frugeofficer: VP, General Counsel | Sale | 1,000 | $13.56 | 265,213 |
| Mar 6, 2026 | Mary Celeste Frugeofficer: VP, General Counsel | Sale | 11,193 | $13.34 | 265,213 |
CongressHouse and Senate disclosures
Not reported.