| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Counted by filing, the last 12 months brought no open-market purchases and 4 sales by 4 insiders worth about $4.1M. The 12 months before that brought 4 open-market purchases by 4 insiders worth about $227K and no sales.
None of the 4 sales in the last 12 months was marked as made under a Rule 10b5-1 trading plan.
The largest open-market purchase in the last two years was 2,000 shares by Douglas T Dietrich (Chairman and CEO) at an average $51.56 on April 30, 2025, about $103K. Twelve months later MTX was up 39%.
The most recent purchase was by Rocky Motwani on June 16, 2025.
| Role | Insider | Shares | Value | 30d |
|---|---|---|---|---|
| CEO | 176.0K | $11.16M | - | |
| Pres | 89.1K | $5.65M | - | |
| VP | 63.8K | $4.05M | - | |
| VP | 39.5K | $2.51M | - | |
| Pres | 32.6K | $2.07M | - |
Buys and sells only
| Date | Insider | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| May 14, 2026 | Douglas T Dietrich64 | Chairman and CEO | Sale+OE | 21,568 | $81.53 | $1,758,421.79 | -10.9% | -10.3% | - | |
| May 11, 2026 | Timothy Jordan | Vice President | Sell | 6,000 | $80.27 | $481,648.20 | -82.4% | -7.3% | - | |
| Dec 29, 2025 | Dj Monagle III65 | Group President | Sale+OE | 23,093 | $61.90 | $1,429,523.67 | -21.5% | +12.9% | - | |
| Nov 21, 2025 | Brett Argirakis | Group President | Sale+OE | 6,501 | $58.68 | $381,458.53 | -19.1% | +23.0% | - | |
| Jun 16, 2025 | Rocky Motwani | - | Buy | 370 | $54.31 | $20,094.26 | +45.0% | +15.7% | +42.9% | |
| May 2, 2025 | Kristina M Johnson54 | - | Buy | 1,000 | $53.79 | $53,785.40 | +250.0% | +9.7% | +43.3% | |
| Apr 30, 2025 | Erik Aldag | SVP Finance and Treasury, CFO | Buy | 1,000 | $50.37 | $50,370.00 | +30.8% | +16.2% | +39.4% | |
| Apr 30, 2025 | Douglas T Dietrich64 | Chairman and CEO | Buy | 2,000 | $51.56 | $103,120.00 | +1.3% | +16.2% | +39.4% | |
| Jun 24, 2024 | Dj Monagle III65 | Group President | Sale+OE | 14,229 | $83.63 | $1,189,910.09 | -15.1% | -11.2% | -34.2% | |
| Jun 18, 2024 | Jonathan J Hastings64 | Senior Vice President | Sale+OE | 21,543 | $84.35 | $1,817,197.29 | -28.6% | -14.1% | -36.3% |