Matthew Lanigan, President and CEO of NPK International Inc. ($NPKI), made two open market sales of company shares in the last year, totaling $723 thousand. His most recent sale occurred on September 3, 2025. These transactions rank fifth thousand six hundred fifty-ninth among eleven thousand six hundred seventy-eight insiders by sale value, well below the average of $8.6 million per person across nearly six point four deals. Lanigan reported no open market purchases.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct. 3, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | G | Common Stock | 770249 | $0.00 | 1,095,913.0000 | 111,669,000 | 41.27% | 0.69% |
| Sept. 3, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Non-Qualified Stock Option (right to buy) | 1000 | $10.38 | 0.0000 | 111,669,000 | 100.00% | 0.00% |
| Sept. 3, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | S | Common Stock | 1000 | $10.38 | 1,095,913.0000 | 111,669,000 | 0.09% | 0.00% |
| Sept. 3, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Common Stock | 1000 | $4.32 | 1,096,913.0000 | 111,669,000 | 0.09% | 0.00% |
| Aug. 22, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Common Stock | 68896 | $4.32 | 1,164,809.0000 | 111,669,000 | 6.29% | 0.06% |
| Aug. 22, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Non-Qualified Stock Option (right to buy) | 68896 | $10.34 | 1,000.0000 | 111,669,000 | 98.57% | 0.06% |
| Aug. 22, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | S | Common Stock | 68896 | $10.34 | 1,095,913.0000 | 111,669,000 | 5.91% | 0.06% |
| June 1, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Common Stock | 108651 | $0.00 | 1,100,134.0000 | 111,669,000 | 10.96% | 0.10% |
| June 1, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Common Stock | 100188 | $0.00 | 1,200,322.0000 | 111,669,000 | 9.11% | 0.09% |
| June 1, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | F | Common Stock | 22232 | $8.09 | 1,178,090.0000 | 111,669,000 | 1.85% | 0.02% |
| June 1, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | F | Common Stock | 39423 | $8.09 | 1,138,667.0000 | 111,669,000 | 3.35% | 0.04% |
| June 1, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | F | Common Stock | 42754 | $8.09 | 1,095,913.0000 | 111,669,000 | 3.75% | 0.04% |
| June 1, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Restricted Stock Units | 108651 | $0.00 | 200,376.0000 | 111,669,000 | 35.16% | 0.10% |
| June 1, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Restricted Stock Units | 100188 | $0.00 | 100,188.0000 | 111,669,000 | 50.00% | 0.09% |
| May 14, 2025 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | A | Common Stock | 212667 | $0.00 | 991,483.0000 | 111,669,000 | 27.31% | 0.19% |
| Sept. 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Restricted Stock Units | 33333 | $0.00 | 309,027.0000 | 111,669,000 | 9.74% | 0.03% |
| Sept. 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | F | Common Stock | 13116 | $8.23 | 778,816.0000 | 111,669,000 | 1.66% | 0.01% |
| Sept. 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Common Stock | 33333 | $0.00 | 791,932.0000 | 111,669,000 | 4.39% | 0.03% |
| June 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Restricted Stock Units | 108651 | $0.00 | 442,549.0000 | 111,669,000 | 19.71% | 0.10% |
| June 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Restricted Stock Units | 100189 | $0.00 | 342,360.0000 | 111,669,000 | 22.64% | 0.09% |
| June 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | F | Common Stock | 39424 | $8.48 | 815,947.0000 | 111,669,000 | 4.61% | 0.04% |
| June 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Common Stock | 108651 | $0.00 | 755,182.0000 | 111,669,000 | 16.81% | 0.10% |
| June 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Common Stock | 37090 | $0.00 | 646,531.0000 | 111,669,000 | 6.09% | 0.03% |
| June 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Common Stock | 100189 | $0.00 | 855,371.0000 | 111,669,000 | 13.27% | 0.09% |
| June 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | F | Common Stock | 42754 | $8.48 | 773,193.0000 | 111,669,000 | 5.24% | 0.04% |
| June 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | F | Common Stock | 14594 | $8.48 | 758,599.0000 | 111,669,000 | 1.89% | 0.01% |
| June 1, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | M | Restricted Stock Units | 37090 | $0.00 | 551,200.0000 | 111,669,000 | 6.30% | 0.03% |
| May 15, 2024 | NPK International Inc. | $NPKI | LANIGAN MATTHEW | President & CEO | A | Common Stock | 169496 | $0.00 | 609,441.0000 | 111,669,000 | 38.53% | 0.15% |