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| Ticker | Owner | Relationship | Date | Transaction | Cost | #Shares | Value ($) | #Shares Total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | May 14 '26 | Sale | 81.53 | 21,568 | 1,758,422 | 175,973 | May 18 |
| MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | May 14 '26 | Option Exercise | 78.03 | 21,568 | 1,682,843 | 197,541 | May 18 |
| KMT | DIETRICH DOUGLAS T | Director | Jan 30 '26 | Option Exercise | 34.39 | 841 | 28,922 | 841 | Feb 03 |
| MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | Jan 26 '26 | Option Exercise | 0.00 | 11,123 | 0 | 182,125 | Jan 27 |
| MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | Jan 23 '26 | Option Exercise | 0.00 | 11,016 | 0 | 177,094 | Jan 27 |
| MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | Jan 21 '26 | Option Exercise | 0.00 | 10,033 | 0 | 171,708 | Jan 23 |
| MTX | DIETRICH DOUGLAS T | CHAIRMAN AND CEO | Apr 30 '25 | Buy | 51.56 | 2,000 | 103,120 | 161,675 | May 01 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | Jan 27 '25 | Option Exercise | 0.00 | 9,549 | 0 | 164,956 | Jan 29 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | Jan 24 '25 | Option Exercise | 0.00 | 11,124 | 0 | 161,559 | Jan 28 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | Jan 23 '25 | Option Exercise | 0.00 | 11,017 | 0 | 156,564 | Jan 27 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | May 29 '24 | Option Exercise | 40.05 | 24,978 | 1,000,302 | 170,525 | May 30 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | May 29 '24 | Sale | 84.18 | 24,978 | 2,102,661 | 145,547 | May 30 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | May 28 '24 | Sale | 84.85 | 12,010 | 1,019,081 | 145,547 | May 30 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | May 28 '24 | Option Exercise | 60.19 | 12,010 | 722,822 | 157,557 | May 30 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | Jan 26 '24 | Option Exercise | 0.00 | 9,697 | 0 | 150,910 | Jan 29 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | Jan 25 '24 | Option Exercise | 0.00 | 9,550 | 0 | 146,495 | Jan 29 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | Jan 24 '24 | Option Exercise | 0.00 | 11,124 | 0 | 143,164 | Jan 26 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | Dec 07 '23 | Option Exercise | 57.97 | 13,936 | 807,800 | 145,702 | Dec 08 |
| MTX | DIETRICH DOUGLAS T | Chairman and CEO | Dec 07 '23 | Sale | 63.40 | 13,662 | 866,167 | 132,040 | Dec 08 |