Douglas T. Dietrich is CEO & Chairman at MINERALS TECHNOLOGIES INC (MTX). They have made 11 open-market trades across 1 company since 2016, most recently 2026-05-14.
CIK 0001408736
3 open-market purchases totalling $224K since 2019, against 8 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MTX | 175,973 | $11.1M |
| KMT | 841 | $26K |
| MTX1 | 20,283 | — |
| Total | $11.1M |
Shares reported on the most recent Form 4, priced at the 2026-05-18 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MTX | SELL | 2026-05-14 | 2026-05-18 | $81.53 | $1.8M | +3.4% | +3.1% | -3.2% |
| MTX | BUY | 2025-04-30 | 2025-05-01 | $51.56 | $103K | +10.6% | +5.2% | +10.0% |
| MTX | SELL | 2024-05-28 | 2024-05-30 | $84.40 | $6.2M | -2.7% | -5.0% | -12.7% |
| MTX | SELL | 2023-12-07 | 2023-12-08 | $63.40 | $1.7M | +6.4% | +7.7% | +14.4% |
| MTX | SELL | 2022-09-08 | 2022-09-12 | $60.06 | $2.0M | -13.3% | -15.0% | -2.3% |
| MTX | SELL | 2021-02-25 | 2021-02-26 | $72.49 | $2.0M | +8.4% | +2.3% | +18.7% |
| MTX | SELL | 2020-11-09 | 2020-11-10 | $61.46 | $1.5M | -5.5% | -1.3% | +11.1% |
| MTX | BUY | 2020-03-27 | 2020-03-30 | $32.75 | $49K | +14.4% | +34.9% | +33.2% |
| MTX | BUY | 2019-08-29 | 2019-09-03 | $47.99 | $72K | +15.2% | +4.5% | +11.8% |
| MTX | SELL | 2016-08-09 | 2016-08-10 | $69.21 | $767K | +0.8% | -6.8% | -3.7% |
| MTX | SELL | 2016-08-09 | 2016-08-10 | $69.26 | $698K | +0.8% | -6.8% | -3.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.