10 insiders have filed at MTX since 2023Q3: names, roles, reported stakes, and each person's buying and selling record from SEC Form 3/4/5 filings.
| name | role | reported stake | % of company | buys (3y) | sells (3y) |
|---|---|---|---|---|---|
| Dietrich Douglas T | Chairman And CEO | 180.5k | 0.582% | 1 buys $103k | 3 sells $4.0M |
| Monagle Dj III | Group President | 89.9k | 0.29% | 5 sells $3.7M | |
| Hastings Jonathan J | Senior Vice President | 66.7k | 0.215% | 6 sells $4.7M | |
| Cipolla Michael | Vice President | 49.3k | 0.159% | 2 sells $1.3M | |
| Argirakis Brett | Group President | 35.5k | 0.114% | 3 sells $749k | |
| Jordan Timothy | Vice President | 10.0k | 0.032% | ||
| Cutler Erin | VP, Human Resources | 9.4k | 0.03% | 1 sells $19k | |
| Aldag Erik | SVP Finance And Treasury, CFO | 7.9k | 0.025% | 1 buys $50k | |
| Johnson Kristina M | Director | 1.4k | <0.01% | 2 buys $86k | |
| Motwani Rocky | Director | 1.2k | <0.01% | 1 buys $20k |
Full register at boothcheck.com/insiders/MTX. Stakes are the newest reported Form 3/4/5 balances (they update only when insiders file). Sales counted include pre-scheduled plan sales, labeled. A filed record, not a forecast. Nothing here is investment advice.