| Insiders | Shares | % | Avg Price | Total $ | |
|---|---|---|---|---|---|
| Buys | 2 | +16,500 | 6.6% | $7.98 | +$131,678 |
| Sells | 5 | -234,553 | 93% | $12.14 | -$2,847,307 |
| Net | -3 | -218,053 | -87% | -$2,715,630 |
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Report Date |
|---|---|---|---|---|---|
| Matthew Lanigan | President & CEO, Director | $14,938,067 | -$722,916 | -4.6% | 03 Oct 2025 |
| Gregg S. Piontek | Senior Vice President and CFO | $14,349,326 | -$1,528,056 | -9.6% | 04 Mar 2026 |
| Paul L. Howes | President & CEO, Director | $4,813,847 | 26 Aug 2021 | ||
| David Andrew Paterson | VP & President, Fluids Systems, VP & President, Fluids Systems | $3,910,637 | 01 Jun 2024 | ||
| Mary Celeste Fruge | VP, General Counsel | $3,830,643 | -$149,303 | -3.8% | 16 Mar 2026 |
| Lori Briggs | VP & President, Ind. Solutions | $3,240,797 | -$342,408 | -9.6% | 01 Oct 2025 |
| Douglas L. White | VP, CAO & Treasurer | $2,383,178 | 14 Jun 2025 | ||
| Michael A. Lewis | Director | $1,878,744 | -$91,064 | -4.6% | 23 Feb 2026 |
| Donald W. Young | Director | $1,787,905 | 15 May 2025 | ||
| Roderick A. Larson | Director | $1,430,300 | 15 May 2025 | ||
| John C. Minge | Director | $1,410,958 | 15 May 2025 | ||
| Rose M. Robeson | Director | $1,232,138 | 15 May 2025 | ||
| G. Stephen Finley | Director | $1,051,385 | 20 May 2021 | ||
| Claudia Michel Meer | Director | $935,629 | +$31,680 | +3.5% | 19 May 2025 |
| Anthony James Best | Director | $907,598 | 19 May 2022 | ||
| Edward Chipman Earle | VP, General Counsel, CAO | $878,806 | 14 Dec 2022 | ||
| Joseph A. Cutillo | Director | $158,682 | +$99,998 | +170% | 15 May 2025 |
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| M. Celeste Fruge | NPKI | Common Stock | Sale | -0.38% | $13,560 | $13.56 | -1,000 | 265,213 | 16 Mar 2026 | Direct |
| M. Celeste Fruge | NPKI | Common Stock | Options Exercise | 0.38% | 1,000 | 266,213 | 16 Mar 2026 | Direct | ||
| M. Celeste Fruge | NPKI | Non-Qualified Stock Option (right to buy) | Options Exercise | -100% | -1,000 | 0 | 16 Mar 2026 | Direct | ||
| M. Celeste Fruge | NPKI | Common Stock | Sale | -4.05% | $149,303 | $13.34 | -11,193 | 265,213 | 06 Mar 2026 | Direct |
| M. Celeste Fruge | NPKI | Common Stock | Options Exercise | 4.22% | 11,193 | 276,406 | 06 Mar 2026 | Direct | ||
| M. Celeste Fruge | NPKI | Non-Qualified Stock Option (right to buy) | Options Exercise | -91.8% | -11,193 | 1,000 | 06 Mar 2026 | Direct | ||
| Gregg S. Piontek | NPKI | Common Stock | Sale | -10.9% | $1,528,056 | $14.07 | -108,590 | 884,326 | 04 Mar 2026 | Direct |
| Gregg S. Piontek | NPKI | Common Stock | Options Exercise | 8% | 73,590 | 992,916 | 04 Mar 2026 | Direct | ||
| Gregg S. Piontek | NPKI | Non-Qualified Stock Option (right to buy) | Options Exercise | -100% | -73,590 | 0 | 04 Mar 2026 | Direct | ||
| Michael A. Lewis | NPKI | Common Stock | Sale | -1.51% | $28,796 | $14.31 | -2,013 | 131,333 | 23 Feb 2026 | Direct |
| Michael A. Lewis | NPKI | Common Stock | Sale | -1.49% | $24,156 | $12.00 | -2,013 | 133,346 | 24 Nov 2025 | Direct |
| Matthew Lanigan | NPKI | Common Stock | Gift | -70.3% | -770,249 | 325,664 | 03 Oct 2025 | Direct | ||
| Lori Briggs | NPKI | Common Stock | Sale | -4% | $116,352 | $11.51 | -10,108 | 242,513 | 01 Oct 2025 | Direct |
| Matthew Lanigan | NPKI | Common Stock | Sale | -0.09% | $10,380 | $10.38 | -1,000 | 1,095,913 | 03 Sep 2025 | Direct |
| Matthew Lanigan | NPKI | Common Stock | Options Exercise | 0.09% | 1,000 | 1,096,913 | 03 Sep 2025 | Direct | ||
| Matthew Lanigan | NPKI | Non-Qualified Stock Option (right to buy) | Options Exercise | -100% | -1,000 | 0 | 03 Sep 2025 | Direct | ||
| Michael A. Lewis | NPKI | Common Stock | Sale | -1.47% | $20,796 | $10.33 | -2,013 | 135,359 | 25 Aug 2025 | Direct |
| Matthew Lanigan | NPKI | Common Stock | Sale | -5.91% | $712,536 | $10.34 | -68,896 | 1,095,913 | 22 Aug 2025 | Direct |
| Matthew Lanigan | NPKI | Common Stock | Options Exercise | 6.29% | 68,896 | 1,164,809 | 22 Aug 2025 | Direct | ||
| Matthew Lanigan | NPKI | Non-Qualified Stock Option (right to buy) | Options Exercise | -98.6% | -68,896 | 1,000 | 22 Aug 2025 | Direct | ||
| Lori Briggs | NPKI | Common Stock | Sale | -3.07% | $76,148 | $9.51 | -8,005 | 252,621 | 11 Aug 2025 | Direct |
| Lori Briggs | NPKI | Common Stock | Sale | -2.98% | $68,584 | $8.57 | -8,005 | 260,626 | 09 Jul 2025 | Direct |
| Michael A. Lewis | NPKI | Common Stock | Sale | -1.44% | $17,315 | $8.60 | -2,013 | 137,372 | 16 Jun 2025 | Direct |
| Douglas L. White | NPKI | Common Stock | Award | 0.24% | 730 | 305,245 | 14 Jun 2025 | Direct | ||
| Lori Briggs | NPKI | Common Stock | Sale | -3.49% | $81,324 | $8.38 | -9,704 | 268,631 | 06 Jun 2025 | Direct |
| M. Celeste Fruge | NPKI | Common Stock | Options Exercise | 6.97% | 17,274 | 265,213 | 01 Jun 2025 | Direct | ||
| M. Celeste Fruge | NPKI | Restricted Stock Units | Options Exercise | -50% | -17,274 | 17,274 | 01 Jun 2025 | Direct | ||
| Douglas L. White | NPKI | Common Stock | Tax liability | -4.91% | -15,713 | 304,515 | 01 Jun 2025 | Direct | ||
| Douglas L. White | NPKI | Common Stock | Options Exercise | 11.1% | 32,000 | 320,228 | 01 Jun 2025 | Direct | ||
| Douglas L. White | NPKI | Restricted Stock Units | Options Exercise | -68.6% | -32,000 | 14,666 | 01 Jun 2025 | Direct | ||
| Lori Briggs | NPKI | Common Stock | Tax liability | -8.35% | -25,364 | 278,335 | 01 Jun 2025 | Direct | ||
| Lori Briggs | NPKI | Common Stock | Options Exercise | 20.1% | 50,736 | 303,699 | 01 Jun 2025 | Direct | ||
| Lori Briggs | NPKI | Restricted Stock Units | Options Exercise | -67.6% | -50,736 | 24,340 | 01 Jun 2025 | Direct | ||
| Matthew Lanigan | NPKI | Common Stock | Tax liability | -8.7% | -104,409 | 1,095,913 | 01 Jun 2025 | Direct | ||
| Matthew Lanigan | NPKI | Common Stock | Options Exercise | 21.1% | 208,839 | 1,200,322 | 01 Jun 2025 | Direct | ||
| Matthew Lanigan | NPKI | Restricted Stock Units | Options Exercise | -67.6% | -208,839 | 100,188 | 01 Jun 2025 | Direct | ||
| Gregg S. Piontek | NPKI | Common Stock | Tax liability | -4.57% | -42,079 | 878,947 | 01 Jun 2025 | Direct | ||
| Gregg S. Piontek | NPKI | Common Stock | Options Exercise | 10.1% | 84,169 | 921,026 | 01 Jun 2025 | Direct | ||
| Gregg S. Piontek | NPKI | Restricted Stock Units | Options Exercise | -67.6% | -84,169 | 40,379 | 01 Jun 2025 | Direct | ||
| Claudia Michel Meer | NPKI | Common Stock | Purchase | 3.5% | $31,680 | $7.92 | 4,000 | 118,135 | 19 May 2025 | Direct |
| Roderick A. Larson | NPKI | Common Stock | Award | 15,097 | 15,097 | 15 May 2025 | Direct | |||
| Donald W. Young | NPKI | Common Stock | Award | 5.1% | 15,097 | 310,940 | 15 May 2025 | Direct | ||
| Rose M. Robeson | NPKI | Common Stock | Award | 9.57% | 18,720 | 214,285 | 15 May 2025 | Direct | ||
| John C. Minge | NPKI | Common Stock | Award | 6.56% | 15,097 | 245,384 | 15 May 2025 | Direct | ||
| Claudia Michel Meer | NPKI | Common Stock | Award | 15.2% | 15,097 | 114,135 | 15 May 2025 | Direct | ||
| Michael A. Lewis | NPKI | Common Stock | Award | 12.2% | 15,097 | 139,385 | 15 May 2025 | Direct | ||
| Joseph A. Cutillo | NPKI | Common Stock | Award | 120.8% | 15,097 | 27,597 | 15 May 2025 | Direct | ||
| Douglas L. White | NPKI | Common Stock | Award | 11.6% | 29,900 | 288,228 | 14 May 2025 | Direct | ||
| Gregg S. Piontek | NPKI | Common Stock | Award | 10.8% | 85,706 | 877,236 | 14 May 2025 | Direct | ||
| Matthew Lanigan | NPKI | Common Stock | Award | 27.3% | 212,667 | 991,483 | 14 May 2025 | Direct |