NPK International's top three insider shareholders as of July 24, 2026 are Paul L Howes (President Ceo, 1.24Mn shares), Gregg Piontek (Senior Vice President And Cfo, 819.33K shares), David A Paterson (Vp President, Fluids Systems, 386.25K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Paul L Howes | President Ceo | 1,236,325 | 0 | 27 Aug, 2021 |
| Anthony James Best | - | 237,809 | 0 | 20 May, 2022 |
| Gregg Piontek | Senior Vice President And Cfo | 819,326 | 0 | 10 Apr, 2026 |
| Michael A Lewis | - | 131,333 | 0 | 25 Feb, 2026 |
| Roderick A. Larson | - | 15,097 | 0 | 19 May, 2025 |
| Edward Chipman Earle | Vp, General Counsel, Cao | 230,265 | 0 | 16 Dec, 2022 |
| Douglas L White | Vp, Cao Treasurer | 305,245 | 0 | 17 Jun, 2025 |
| Joseph A Cutillo | - | 27,597 | 0 | 19 May, 2025 |
| Matthew Lanigan | President Ceo | 325,664 | 0 | 06 Oct, 2025 |
| John C Minge | - | 245,384 | 0 | 19 May, 2025 |
| David A Paterson | Vp President, Fluids Systems | 386,245 | 0 | 04 Jun, 2024 |
| Claudia Michel Meer | - | 118,135 | 0 | 20 May, 2025 |
| Lori Briggs | Vp President, Ind. Solutions | 242,513 | 0 | 03 Oct, 2025 |
| Donald Win Young | - | 310,940 | 0 | 19 May, 2025 |
| Mary Celeste Fruge | Vp, General Counsel | 265,213 | 0 | 18 Mar, 2026 |
* 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 |
| 09 Apr, 2026 | Gregg Piontek | Common Stock | D | 15,000 | $15.05 | 819,326 | D | S |
| 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 |
| 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 |
| 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 | A | 73,590 | $4.32 | 992,916 | D | M |