🕵️ Minerals Technologies Inc ($MTX)
SEC insider & ownership activity, last 12 months · CIK 891014 · every row links its SEC filing
Over the last 12 months insiders sold $4.1M with no open-market buying against it. Douglas T. Dietrich sold $1.8M in discretionary trades (May). 2 planned sales are pending, the largest $3.7M (Jonathan J. Hastings). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 4 sellers, $4.1M (4 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Douglas T. Dietrich | 0 | – | 1 | $1.8M | May 14, 2026 |
| Monagle Dj III | 0 | – | 1 | $1.4M | Dec 29, 2025 |
| Jordan Timothy | 0 | – | 1 | $482K | May 11, 2026 |
| Argirakis Brett | 0 | – | 1 | $381K | Nov 21, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Blackrock, Inc. | 15.2% | 13G | Apr 28, 2025 | filing ↗ | |
| FMR LLC | 13.7% | 13G | May 6, 2026 | filing ↗ | |
| Abigail P. Johnson | 13.7% | 13G | May 6, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 6.2% | 13G | Apr 29, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.2% | 13G | Apr 30, 2026 | filing ↗ | |
| Nomura Asset Management International Inc. | 5.0% | 13G | Feb 17, 2026 | filing ↗ | |
| Nomura Investment Management Business Trust | 5.0% | 13G | Feb 17, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Douglas T. Dietrich | $1.8M | May 14, 2026 | filing ↗ |
| Jordan Timothy | $482K | May 11, 2026 | filing ↗ |
| Jonathan J. Hastings | $1.4M | May 6, 2026 | filing ↗ |
| Jonathan J. Hastings | $3.7M | May 6, 2026 | filing ↗ |
| Monagle Dj III | $1.4M | Dec 29, 2025 | filing ↗ |
| Argirakis Brett | $381K | Nov 21, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Other events (8.01) | Jul 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 22, 2026 | filing ↗ |
| Other events (8.01) | Jun 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 29, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 19, 2026 | filing ↗ |
| Other events (8.01) | May 19, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 19, 2026 | filing ↗ |
| Earnings (2.02) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 5, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 18, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 29, 2026 | filing ↗ |
| Other events (8.01) | Jan 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 21, 2026 | filing ↗ |
| Earnings (2.02) | Oct 23, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 23, 2025 | filing ↗ |
| Other events (8.01) | Oct 15, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 15, 2025 | filing ↗ |