Gregg S. Piontek's most recent trade in NPK International Inc. was a trade of 40,379 Restricted Stock Units done . Disclosure was reported to the exchange on June 1, 2026.
| Stock | Client Name | Client Category | Action | Reported to Exchange | Quantity | Post Transaction Holding | Traded % | Avg. Price | Value | Security Type |
|---|---|---|---|---|---|---|---|---|---|---|
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2026 | 40,379 | 0 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2026 | 40,379 | 858,182 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 14.31 per share. | 01 Jun 2026 | 15,889 | 829,044 (0%) | 0% | 14.3 | 227,372 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 14.31 per share. | 01 Jun 2026 | 11,241 | 817,803 (0%) | 0% | 14.3 | 160,859 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 14.31 per share. | 01 Jun 2026 | 8,959 | 844,933 (0%) | 0% | 14.3 | 128,203 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 19 May 2026 | 34,566 | 853,892 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Sale of securities on an exchange or to another person at price $ 15.04 per share. | 09 Apr 2026 | 15,000 | 819,326 (0%) | 0% | 15.0 | 225,675 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Sale of securities on an exchange or to another person at price $ 14.51 per share. | 01 Apr 2026 | 35,000 | 834,326 (0%) | 0% | 14.5 | 507,864 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Sale of securities on an exchange or to another person at price $ 15.03 per share. | 25 Mar 2026 | 15,000 | 869,326 (0%) | 0% | 15.0 | 225,384 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2025 | 43,790 | 80,758 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2025 | 43,790 | 921,026 (1%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2025 | 40,379 | 40,379 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2025 | 40,379 | 919,326 (1%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 8.09 per share. | 01 Jun 2025 | 17,231 | 903,795 (1%) | 0% | 8.1 | 139,399 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 8.09 per share. | 01 Jun 2025 | 15,889 | 887,906 (0%) | 0% | 8.1 | 128,542 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 8.09 per share. | 01 Jun 2025 | 8,959 | 878,947 (0%) | 0% | 8.1 | 72,478 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 14 May 2025 | 85,706 | 877,236 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2024 | 51,181 | 760,619 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2024 | 51,181 | 208,718 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2024 | 43,790 | 164,928 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2024 | 43,790 | 804,409 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2024 | 40,380 | 124,548 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2024 | 40,380 | 844,789 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 8.48 per share. | 01 Jun 2024 | 20,139 | 791,530 (0%) | 0% | 8.5 | 170,779 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 8.48 per share. | 01 Jun 2024 | 17,231 | 811,669 (0%) | 0% | 8.5 | 146,119 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 8.48 per share. | 01 Jun 2024 | 15,889 | 828,900 (0%) | 0% | 8.5 | 134,739 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 15 May 2024 | 68,308 | 709,438 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2023 | 51,182 | 259,899 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2023 | 51,182 | 641,130 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2023 | 47,432 | 311,081 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2023 | 47,432 | 602,410 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2023 | 43,791 | 565,641 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2023 | 43,791 | 358,513 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 3.67 per share. | 01 Jun 2023 | 12,462 | 589,948 (0%) | 0% | 3.7 | 45,736 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 3.67 per share. | 01 Jun 2023 | 10,663 | 554,978 (0%) | 0% | 3.7 | 39,133 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 18 May 2023 | 121,138 | 402,304 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Purchase of securities on an exchange or from another person at price $ 2.55 per share. | 05 Aug 2022 | 10,000 | 65,000 (0%) | 0% | 2.5 | 25,487 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2022 | 51,182 | 541,990 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2022 | 51,182 | 281,166 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2022 | 50,000 | 467,706 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2022 | 50,000 | 402,877 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2022 | 47,433 | 509,472 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2022 | 47,433 | 332,348 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2022 | 23,096 | 471,127 (0%) | 0% | 0 | Common Stock | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. | 01 Jun 2022 | 23,096 | 379,781 | - | - | Restricted Stock Units | |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 4.48 per share. | 01 Jun 2022 | 20,140 | 521,850 (0%) | 0% | 4.5 | 90,227 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 4.48 per share. | 01 Jun 2022 | 19,675 | 448,031 (0%) | 0% | 4.5 | 88,144 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 4.48 per share. | 01 Jun 2022 | 18,664 | 490,808 (0%) | 0% | 4.5 | 83,615 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Payment of exercise price or tax liability using portion of securities received from the company at price $ 4.48 per share. | 01 Jun 2022 | 9,088 | 462,039 (0%) | 0% | 4.5 | 40,714 | Common Stock |
| NPK Intl Inc | Gregg S. Piontek | Senior Vice President and CFO | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 19 May 2022 | 131,371 | 452,877 | - | - | Restricted Stock Units |