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| Date | Name | Title | Action | No Shares | Price Per Share |
|---|---|---|---|---|---|
Insider Transactions For MTX | |||||
| 2026-04-01 | Feder, Franklin | Director | Purchased | 238.87 | $0.00 |
| 2026-04-01 | Pittman, Carolyn K | Director | Purchased | 102.37 | $0.00 |
| 2026-03-06 | Deans, Alison Ann | Director | Purchased | 27.45 | $0.00 |
| 2026-03-06 | Feder, Franklin | Director | Purchased | 40.87 | $0.00 |
| 2026-03-06 | Robinson, Marc E | Director | Purchased | 44.39 | $0.00 |
| 2026-03-06 | Pittman, Carolyn K | Director | Purchased | 33.09 | $0.00 |
| 2026-03-06 | Motwani, Rocky | Director | Purchased | 11 | $0.00 |
| 2026-03-06 | Johnson, Kristina M | Director | Purchased | 7.26 | $0.00 |
| 2026-03-06 | Breunig, Joseph C. | Director | Purchased | 34.89 | $0.00 |
| 2026-03-06 | Carmola, John J | Director | Purchased | 46.24 | $0.00 |
| 2026-03-06 | Clark, Robert L | Director | Purchased | 56.44 | $0.00 |
| 2026-01-26 | Cipolla, Michael | VICE PRESIDENT | Sold | 1292 | $0.00 |
| 2026-01-26 | Cipolla, Michael | VICE PRESIDENT | Sold | 660 | $68.89 |
| 2026-01-26 | Cipolla, Michael | VICE PRESIDENT | Purchased | 1292 | $0.00 |
| 2026-01-26 | Cutler, Erin | VP, Human Resources | Sold | 1195 | $0.00 |
| 2026-01-26 | Cutler, Erin | VP, Human Resources | Sold | 520 | $68.89 |
| 2026-01-26 | Cutler, Erin | VP, Human Resources | Purchased | 1195 | $0.00 |
| 2026-01-26 | Dietrich, Douglas T | Director, CHAIRMAN AND CEO | Sold | 11123 | $0.00 |
| 2026-01-26 | Dietrich, Douglas T | Director, CHAIRMAN AND CEO | Sold | 6152 | $68.89 |
| 2026-01-26 | Monagle, Dj Iii | Group President | Sold | 3519 | $0.00 |
