NPK International's top three insider shareholders as of April 22, 2026 are Paul L Howes (President Ceo, 1.24Mn shares), Gregg Piontek (Senior Vice President And Cfo, 834.33K shares), Gregg Piontek (Senior Vice President And Cfo, 819.33K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Paul L Howes | President Ceo | 1,236,325 | 0 | 27 Aug, 2021 |
| Gregg Piontek | Senior Vice President And Cfo | 834,326 | 0 | 03 Apr, 2026 |
| Gregg Piontek | Senior Vice President And Cfo | 819,326 | 0 | 10 Apr, 2026 |
| David A Paterson | Vp President, Fluids Systems | 386,245 | 0 | 04 Jun, 2024 |
| David A Paterson | Vp President, Fluids Systems | 386,245 | 0 | 04 Jun, 2024 |
| Matthew Lanigan | President Ceo | 325,664 | 0 | 06 Oct, 2025 |
| Donald Win Young | - | 310,940 | 0 | 19 May, 2025 |
| Donald Win Young | - | 310,940 | 0 | 19 May, 2025 |
| Douglas L White | Vp, Cao Treasurer | 305,245 | 0 | 17 Jun, 2025 |
| Douglas L White | Vp, Cao Treasurer | 305,245 | 0 | 17 Jun, 2025 |
| Mary Celeste Fruge | Vp, General Counsel | 265,213 | 0 | 18 Mar, 2026 |
| John C Minge | - | 245,384 | 0 | 19 May, 2025 |
| Lori Briggs | Vp President, Ind. Solutions | 242,513 | 0 | 03 Oct, 2025 |
| Anthony James Best | - | 237,809 | 0 | 20 May, 2022 |
| Edward Chipman Earle | Vp, General Counsel, Cao | 230,265 | 0 | 16 Dec, 2022 |
| Rose M Robeson | - | 214,285 | 0 | 19 May, 2025 |
| Michael A Lewis | - | 131,333 | 0 | 25 Feb, 2026 |
| Claudia Michel Meer | - | 118,135 | 0 | 20 May, 2025 |
| Gregg Piontek | Senior Vice President And Cfo | 0 | 65,000 | 09 Aug, 2022 |
| Gregg Piontek | Senior Vice President And Cfo | 0 | 65,000 | 09 Aug, 2022 |
| Joseph A Cutillo | - | 27,597 | 0 | 19 May, 2025 |
| Roderick A. Larson | - | 15,097 | 0 | 19 May, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 09 Apr, 2026 | Gregg Piontek | Common Stock | D | 15,000 | $15.05 | 819,326 | D | S |
| 01 Apr, 2026 | Gregg Piontek | Common Stock | D | 35,000 | $14.51 | 834,326 | D | S |
| 01 Apr, 2026 | Gregg Piontek | Common Stock | D | 35,000 | $14.51 | 834,326 | D | S |
| 25 Mar, 2026 | Gregg Piontek | Common Stock | D | 15,000 | $15.03 | 869,326 | D | S |
| 25 Mar, 2026 | Gregg Piontek | Common Stock | D | 15,000 | $15.03 | 869,326 | D | S |
| 16 Mar, 2026 | Mary Celeste Fruge | Common Stock | A | 1,000 | $4.32 | 266,213 | D | M |
| 16 Mar, 2026 | Mary Celeste Fruge | Common Stock | D | 1,000 | $13.56 | 265,213 | D | S |
| 16 Mar, 2026 | Mary Celeste Fruge | Non-Qualified Stock Option (right to buy) | D | 1,000 | $0.00 | 0 | D | M |
| 06 Mar, 2026 | Mary Celeste Fruge | Common Stock | A | 11,193 | $4.32 | 276,406 | D | M |
| 06 Mar, 2026 | Mary Celeste Fruge | Common Stock | D | 11,193 | $13.34 | 265,213 | D | S |
| 06 Mar, 2026 | Mary Celeste Fruge | Non-Qualified Stock Option (right to buy) | D | 11,193 | $0.00 | 1,000 | D | M |
| 04 Mar, 2026 | Gregg Piontek | Common Stock | A | 73,590 | $4.32 | 992,916 | D | M |
| 04 Mar, 2026 | Gregg Piontek | Common Stock | A | 73,590 | $4.32 | 992,916 | D | M |
| 04 Mar, 2026 | Gregg Piontek | Common Stock | D | 73,590 | $14.10 | 919,326 | D | S |
| 04 Mar, 2026 | Gregg Piontek | Common Stock | D | 73,590 | $14.10 | 919,326 | D | S |
| 04 Mar, 2026 | Gregg Piontek | Common Stock | D | 35,000 | $14.02 | 884,326 | D | S |
| 04 Mar, 2026 | Gregg Piontek | Common Stock | D | 35,000 | $14.02 | 884,326 | D | S |
| 04 Mar, 2026 | Gregg Piontek | Non-Qualified Stock Option (right to buy) | D | 73,590 | $0.00 | 0 | D | M |
| 04 Mar, 2026 | Gregg Piontek | Non-Qualified Stock Option (right to buy) | D | 73,590 | $0.00 | 0 | D | M |
| 23 Feb, 2026 | Michael A Lewis | Common Stock | D | 2,013 | $14.31 | 131,333 | D | S |