DIETRICH DOUGLAS T, Chairman and CEO of Minerals Technologies Inc. ($MTX), made one open market purchase of common shares in the last year, totaling about $103 thousand. His most recent buy occurred on April 30, 2025. This places him 2,122nd among nearly 5,000 insiders for purchase value, below the average of $1.46 million across about 3.3 transactions per insider. He reported no open market sales in the period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 24, 2026 | KENNAMETAL INC | $KMT | DIETRICH DOUGLAS T | Director | A | Stock Credits | 642 | $40.10 | 10,603.4830 | 77,083,000 | 6.45% | 0.00% |
| Jan. 30, 2026 | KENNAMETAL INC | $KMT | DIETRICH DOUGLAS T | Director | F | Common Stock | 25 | $34.39 | 816.0000 | 77,083,000 | 2.97% | 0.00% |
| Jan. 30, 2026 | KENNAMETAL INC | $KMT | DIETRICH DOUGLAS T | Director | M | Restricted Stock Units | 841 | $0.00 | 1,682.0000 | 77,083,000 | 33.33% | 0.00% |
| Jan. 30, 2026 | KENNAMETAL INC | $KMT | DIETRICH DOUGLAS T | Director | M | Common Stock | 841 | $34.39 | 841.0000 | 77,083,000 | 9999.99% | 0.00% |
| Jan. 26, 2026 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | F | Common Stock | 6152 | $68.89 | 180,535.6770 | 32,299,999 | 3.30% | 0.02% |
| Jan. 26, 2026 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | M | Deferred Restricted Stock Units (DRSUs) | 11123 | $0.00 | 70,081.0000 | 32,299,999 | 13.70% | 0.03% |
| Jan. 23, 2026 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | M | Common Stock | 11016 | $0.00 | 181,656.6770 | 32,299,999 | 6.46% | 0.03% |
| Jan. 23, 2026 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | F | Common Stock | 6092 | $68.77 | 175,564.6770 | 32,299,999 | 3.35% | 0.02% |
| Jan. 26, 2026 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | M | Common Stock | 11123 | $0.00 | 186,687.6770 | 32,299,999 | 6.34% | 0.03% |
| Jan. 23, 2026 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | M | Deferred Restricted Stock Units (DRSUs) | 11016 | $0.00 | 81,204.0000 | 32,299,999 | 11.95% | 0.03% |
| Jan. 21, 2026 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | F | Common Stock | 5630 | $66.92 | 170,640.6770 | 32,299,999 | 3.19% | 0.02% |
| Jan. 21, 2026 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | M | Common Stock | 10033 | $0.00 | 176,270.6770 | 32,299,999 | 6.04% | 0.03% |
| Jan. 21, 2026 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | M | Deferred Restricted Stock Units (DRSUs) | 10033 | $0.00 | 92,220.0000 | 32,299,999 | 9.81% | 0.03% |
| Jan. 20, 2026 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | A | Employee Stock Option (Right to Buy) | 33494 | $0.00 | 33,494.0000 | 32,299,999 | 9999.99% | 0.10% |
| Jan. 20, 2026 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | A | Deferred Restricted Stock Units (DRSUs) | 39000 | $0.00 | 102,253.0000 | 32,299,999 | 61.66% | 0.12% |
| Nov. 24, 2025 | KENNAMETAL INC | $KMT | DIETRICH DOUGLAS T | Director | A | Stock Credits | 893 | $27.12 | 9,657.7920 | 76,829,000 | 10.19% | 0.00% |
| Aug. 26, 2025 | KENNAMETAL INC | $KMT | DIETRICH DOUGLAS T | Director | A | Stock Credits | 991 | $21.44 | 8,595.9520 | 77,894,000 | 13.03% | 0.00% |
| Aug. 15, 2025 | KENNAMETAL INC | $KMT | DIETRICH DOUGLAS T | Director | A | Stock Credits | 6898 | $0.00 | 6,898.0000 | 77,894,000 | 9999.99% | 0.01% |
| May 27, 2025 | KENNAMETAL INC | $KMT | DIETRICH DOUGLAS T | Director | A | Stock Credits | 977 | $21.74 | 1,618.5070 | 78,495,000 | 152.48% | 0.00% |
| April 30, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | P | COMMON STOCK | 2000 | $51.56 | 166,179.2560 | 32,299,999 | 1.22% | 0.01% |
| Feb. 25, 2025 | KENNAMETAL INC | $KMT | DIETRICH DOUGLAS T | Director | A | Stock Credits | 635 | $22.30 | 635.2020 | 78,495,000 | 9999.99% | 0.00% |
| Feb. 1, 2025 | KENNAMETAL INC | $KMT | DIETRICH DOUGLAS T | Director | A | Restricted Stock Units | 2523 | $0.00 | 2,523.0000 | 78,495,000 | 9999.99% | 0.00% |
| Jan. 27, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | F | Common Stock | 5281 | $76.19 | 164,014.8740 | 32,299,999 | 3.12% | 0.02% |
| Jan. 27, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Common Stock | 9549 | $0.00 | 169,295.8740 | 32,299,999 | 5.98% | 0.03% |
| Jan. 27, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Deferred Restricted Stock Units (DRSUs) | 9549 | $0.00 | 63,253.0000 | 32,299,999 | 13.12% | 0.03% |
| Jan. 24, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Common Stock | 11124 | $0.00 | 165,898.8740 | 32,299,999 | 7.19% | 0.03% |
| Jan. 24, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | F | Common Stock | 6152 | $75.68 | 159,746.8740 | 32,299,999 | 3.71% | 0.02% |
| Jan. 24, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Deferred Restricted Stock Units (DRSUs) | 11124 | $0.00 | 72,802.0000 | 32,299,999 | 13.25% | 0.03% |
| Jan. 23, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Deferred Restricted Stock Units (DRSUs) | 11017 | $0.00 | 83,926.0000 | 32,299,999 | 11.60% | 0.03% |
| Jan. 23, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Common Stock | 11017 | $0.00 | 160,903.8740 | 32,299,999 | 7.35% | 0.03% |
| Jan. 23, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | F | Common Stock | 6129 | $75.65 | 154,774.8740 | 32,299,999 | 3.81% | 0.02% |
| Jan. 21, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | A | Deferred Restricted Stock Units (DRSUs) | 30098 | $0.00 | 94,943.0000 | 32,299,999 | 46.42% | 0.09% |
| Jan. 21, 2025 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | A | Employee Stock Option (Right to Buy) | 25848 | $0.00 | 25,848.0000 | 32,299,999 | 9999.99% | 0.08% |
| May 28, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Employee Stock Option (Right to Buy) | 12010 | $0.00 | 2,010.0000 | 32,600,000 | 85.66% | 0.04% |
| May 29, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Employee Stock Option (Right to Buy) | 22968 | $0.00 | 0.0000 | 32,600,000 | 100.00% | 0.07% |
| May 29, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Employee Stock Option (Right to Buy) | 2010 | $0.00 | 0.0000 | 32,600,000 | 100.00% | 0.01% |
| May 29, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | S | Common Stock | 24978 | $84.18 | 149,825.4930 | 32,600,000 | 14.29% | 0.08% |
| May 29, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Common Stock | 22968 | $38.29 | 174,803.4930 | 32,600,000 | 15.13% | 0.07% |
| May 29, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Common Stock | 2010 | $60.19 | 151,835.4930 | 32,600,000 | 1.34% | 0.01% |
| May 28, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | S | Common Stock | 12010 | $84.85 | 149,825.4930 | 32,600,000 | 7.42% | 0.04% |
| May 28, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Common Stock | 12010 | $60.19 | 161,835.4930 | 32,600,000 | 8.02% | 0.04% |
| Jan. 26, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Deferred Restricted Stock Units (DRSUs) | 9697 | $0.00 | 64,845.0000 | 32,600,000 | 13.01% | 0.03% |
| Jan. 26, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | F | Common Stock | 5363 | $66.51 | 149,642.0850 | 32,600,000 | 3.46% | 0.02% |
| Jan. 26, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Common Stock | 9697 | $0.00 | 155,005.0850 | 32,600,000 | 6.67% | 0.03% |
| Jan. 25, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Common Stock | 9550 | $0.00 | 150,590.0850 | 32,600,000 | 6.77% | 0.03% |
| Jan. 25, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | F | Common Stock | 5282 | $66.09 | 145,308.0850 | 32,600,000 | 3.51% | 0.02% |
| Jan. 25, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Deferred Restricted Stock Units (DRSUs) | 9550 | $0.00 | 74,542.0000 | 32,600,000 | 11.36% | 0.03% |
| Jan. 24, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Deferred Restricted Stock Units (DRSUs) | 11124 | $0.00 | 84,092.0000 | 32,600,000 | 11.68% | 0.03% |
| Jan. 24, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | F | Common Stock | 6219 | $66.10 | 141,040.0850 | 32,600,000 | 4.22% | 0.02% |
| Jan. 24, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | M | Common Stock | 11124 | $0.00 | 147,259.0850 | 32,600,000 | 8.17% | 0.03% |
| Jan. 23, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | A | Deferred Restricted Stock Units (DRSUs) | 33049 | $0.00 | 95,216.0000 | 32,600,000 | 53.16% | 0.10% |
| Jan. 23, 2024 | MINERALS TECHNOLOGIES INC | $MTX | DIETRICH DOUGLAS T | Chairman and CEO | A | Employee Stock Option (Right to Buy) | 28382 | $0.00 | 28,382.0000 | 32,600,000 | 9999.99% | 0.09% |