MTX · Insider Trading
Minerals Technologies Inc
Every open-market purchase and sale reported by MTX officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-02 | Carolyn K Pittman | Director | A | +112 deriv. | — |
| 2026-09-09 | John J Carmola | Director | A | +46 deriv. | — |
| 2026-09-09 | Carolyn K Pittman | Director | A | +34 deriv. | — |
| 2026-09-09 | Robert L Clark | Director | A | +56 deriv. | — |
| 2026-09-09 | Kristina M Johnson | Director | A | +10 deriv. | — |
| 2026-09-09 | Joseph C. Breunig | Director | A | +36 deriv. | — |
| 2026-09-09 | Marc E Robinson | Director | A | +45 deriv. | — |
| 2026-09-09 | Rocky Motwani | Director | A | +13 deriv. | — |
| 2026-07-02 | Carolyn K Pittman | Director | A | +99 deriv. | — |
| 2026-06-22 | John J Carmola | Director | A | +42 deriv. | — |
| 2026-06-22 | Joseph C. Breunig | Director | A | +32 deriv. | — |
| 2026-06-22 | Kristina M Johnson | Director | A | +9 deriv. | — |
| 2026-06-22 | Marc E Robinson | Director | A | +40 deriv. | — |
| 2026-06-22 | Robert L Clark | Director | A | +51 deriv. | — |
| 2026-06-22 | Carolyn K Pittman | Director | A | +31 deriv. | — |
| 2026-06-22 | Rocky Motwani | Director | A | +12 deriv. | — |
| 2026-05-21 | Marc E Robinson | Director | A | +1,908 deriv. | — |
| 2026-05-21 | Carolyn K Pittman | Director | A | +1,908 deriv. | — |
| 2026-05-21 | Kristina M Johnson | Director | A | +1,908 deriv. | — |
| 2026-05-21 | Joseph C. Breunig | Director | A | +1,908 deriv. | — |
| 2026-05-21 | John J Carmola | Director | A | +1,908 deriv. | — |
| 2026-05-21 | Rocky Motwani | Director | A | +1,908 deriv. | — |
| 2026-05-21 | Robert L Clark | Director | A | +1,908 deriv. | — |
| 2026-05-18 | Douglas T Dietrich | CHAIRMAN AND CEO | MIXED | — | −$75.58K |
| 2026-05-13 | Timothy Jordan | Vice President | Sell | −6,000 | −$481.65K |
| 2026-04-03 | Franklin Feder | Director | A | +238 deriv. | — |
| 2026-04-02 | Carolyn K Pittman | Director | A | +102 deriv. | — |
| 2026-03-10 | Rocky Motwani | Director | A | +10 deriv. | — |
| 2026-03-10 | John J Carmola | Director | A | +46 deriv. | — |
| 2026-03-10 | Marc E Robinson | Director | A | +44 deriv. | — |
| 2026-03-10 | Franklin Feder | Director | A | +40 deriv. | — |
| 2026-03-10 | Alison Ann Deans | Director | A | +27 deriv. | — |
| 2026-03-10 | Robert L Clark | Director | A | +56 deriv. | — |
| 2026-03-10 | Kristina M Johnson | Director | A | +7 deriv. | — |
| 2026-03-10 | Joseph C. Breunig | Director | A | +34 deriv. | — |
| 2026-03-10 | Carolyn K Pittman | Director | A | +33 deriv. | — |
| 2026-01-27 | Timothy Jordan | Vice President | MIXED | +1,924 | −$140.34K |
| 2026-01-27 | Michael Cipolla | VICE PRESIDENT | MIXED | +1,285 | −$98.70K |
| 2026-01-27 | Douglas T Dietrich | CHAIRMAN AND CEO | MIXED | +9,895 | −$842.76K |
| 2026-01-27 | Erik Aldag | SVP FINANCE AND TREASURY, CFO | MIXED | +1,825 | −$155.47K |
| 2026-01-27 | Brett Argirakis | Group President | MIXED | +3,343 | −$177.29K |
| 2026-01-27 | Jonathan J Hastings | Senior Vice President | MIXED | +3,483 | −$184.53K |
| 2026-01-27 | Erin Cutler | VP, Human Resources | MIXED | +1,343 | −$77.63K |
| 2026-01-27 | Dj Monagle III | Group President | MIXED | +3,268 | −$278.48K |
| 2026-01-23 | Erin Cutler | VP, Human Resources | MIXED | +610 | −$39.01K |
| 2026-01-23 | Timothy Jordan | Vice President | MIXED | +826 | −$71.67K |
| 2026-01-23 | Dj Monagle III | Group President | MIXED | +1,456 | −$136.25K |
| 2026-01-23 | Douglas T Dietrich | CHAIRMAN AND CEO | MIXED | +4,403 | −$376.76K |
| 2026-01-23 | Brett Argirakis | Group President | MIXED | +1,655 | −$97.50K |
| 2026-01-23 | Michael Cipolla | VICE PRESIDENT | MIXED | +559 | −$48.92K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Douglas T Dietrich | CHAIRMAN AND CEO | 202,276 | $12.61M |
| Dj Monagle III | Group President | 88,308 | $5.51M |
| Jonathan J Hastings | Senior Vice President | 66,373 | $4.14M |
| Michael Cipolla | VICE PRESIDENT | 49,331 | $3.08M |
| Brett Argirakis | Group President | 36,613 | $2.28M |
| Erin Cutler | VP, Human Resources | 8,756 | $545.87K |
| Erik Aldag | SVP FINANCE AND TREASURY, CFO | 7,856 | $489.76K |
| Timothy Jordan | Vice President | 4,121 | $256.91K |
| Kristina M Johnson | Director | 1,400 | $87.28K |
| Joseph C. Breunig | Director | 1,200 | $74.81K |
| John J Carmola | Director | 1,200 | $74.81K |
| Rocky Motwani | Director | 1,192 | $74.31K |
| Franklin Feder | Director | 450 | $28.05K |
| Marc E Robinson | Director | 400 | $24.94K |
| Robert L Clark | Director | 400 | $24.94K |
| Carolyn K Pittman | Director | 400 | $24.94K |
| Alison Ann Deans | Director | 400 | $24.94K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the MTX quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.