DIETRICH DOUGLAS T (CIK 1408736) reported 17 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-05-18). Recent activity: Buy MTX (21,568 shares), Sell MTX (21,568 shares), Buy KMT (841 shares), Sell KMT (25 shares), Buy MTX (11,016 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-18 | MINERALS TECHNOLOGIES INC (MTX) | CHAIRMAN AND CEO | Buy | 21,568 | $1.7M |
| 2026-05-18 | MINERALS TECHNOLOGIES INC (MTX) | CHAIRMAN AND CEO | Sell | 21,568 | $1.8M |
| 2026-02-03 | KENNAMETAL INC (KMT) | Director | Buy | 841 | $28,922 |
| 2026-02-03 | KENNAMETAL INC (KMT) | Director | Sell | 25 | $860 |
| 2026-01-27 | MINERALS TECHNOLOGIES INC (MTX) | CHAIRMAN AND CEO | Buy | 11,016 | $0 |
| 2026-01-27 | MINERALS TECHNOLOGIES INC (MTX) | CHAIRMAN AND CEO | Sell | 6,092 | $418,947 |
| 2026-01-27 | MINERALS TECHNOLOGIES INC (MTX) | CHAIRMAN AND CEO | Buy | 11,123 | $0 |
| 2026-01-27 | MINERALS TECHNOLOGIES INC (MTX) | CHAIRMAN AND CEO | Sell | 6,152 | $423,811 |
| 2026-01-23 | MINERALS TECHNOLOGIES INC (MTX) | CHAIRMAN AND CEO | Buy | 10,033 | $0 |
| 2026-01-23 | MINERALS TECHNOLOGIES INC (MTX) | CHAIRMAN AND CEO | Sell | 5,630 | $376,760 |
| 2025-05-01 | MINERALS TECHNOLOGIES INC (MTX) | CHAIRMAN AND CEO | Buy | 2,000 | $103,120 |
| 2025-01-29 | MINERALS TECHNOLOGIES INC (MTX) | Chairman and CEO | Buy | 9,549 | $0 |
| 2025-01-29 | MINERALS TECHNOLOGIES INC (MTX) | Chairman and CEO | Sell | 5,281 | $402,359 |
| 2025-01-28 | MINERALS TECHNOLOGIES INC (MTX) | Chairman and CEO | Buy | 11,124 | $0 |
| 2025-01-28 | MINERALS TECHNOLOGIES INC (MTX) | Chairman and CEO | Sell | 6,152 | $465,583 |
| 2025-01-27 | MINERALS TECHNOLOGIES INC (MTX) | Chairman and CEO | Buy | 11,017 | $0 |
| 2025-01-27 | MINERALS TECHNOLOGIES INC (MTX) | Chairman and CEO | Sell | 6,129 | $463,659 |
Source: SEC Form 4 filings · as of 2026-05-18