Alison Ann Deans
CIK 1457249 · View on SEC EDGAR ↗
Insider
First SEC filing: March 14, 2019 · Latest: March 10, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 15 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| March 6, 2026 | MTX | A | 27 | — | — | 15,439 Direct | +0.18% | Acquired | (price as of 2026-08-20) |
| Dec. 4, 2025 | MTX | A | 31 | — | — | 15,412 Direct | +0.20% | Acquired | (price as of 2026-08-20) |
| Sept. 5, 2025 | MTX | A | 26 | — | — | 15,380 Direct | +0.17% | Acquired | (price as of 2026-08-20) |
| June 12, 2025 | MTX | A | 30 | — | — | 15,354 Direct | +0.20% | Acquired | (price as of 2026-08-20) |
| May 14, 2025 | MTX | A | 2,500 | — | — | 15,324 Direct | +19.49% | Acquired | (price as of 2026-08-20) |
| March 7, 2025 | MTX | A | 21 | — | — | 12,824 Direct | +0.16% | Acquired | (price as of 2026-08-20) |
| Dec. 5, 2024 | MTX | A | 18 | — | — | 12,803 Direct | +0.14% | Acquired | (price as of 2026-08-20) |
| Sept. 6, 2024 | MTX | A | 18 | — | — | 12,785 Direct | +0.14% | Acquired | (price as of 2026-08-20) |
| June 13, 2024 | MTX | A | 15 | — | — | 12,768 Direct | +0.12% | Acquired | (price as of 2026-08-20) |
| May 15, 2024 | MTX | A | 1,542 | — | — | 12,752 Direct | +13.76% | Acquired | (price as of 2026-08-20) |
| March 7, 2024 | MTX | A | 15 | — | — | 11,211 Direct | +0.13% | Acquired | (price as of 2026-08-20) |
| Dec. 7, 2023 | MTX | A | 17 | — | — | 11,195 Direct | +0.15% | Acquired | (price as of 2026-08-20) |
| Sept. 8, 2023 | MTX | A | 10 | — | — | 11,178 Direct | +0.09% | Acquired | (price as of 2026-08-20) |
| June 15, 2023 | MTX | A | 10 | — | — | 11,168 Direct | +0.09% | Acquired | (price as of 2026-08-20) |
| May 17, 2023 | MTX | A | 2,067 | — | — | 11,158 Direct | +22.74% | Acquired | (price as of 2026-08-20) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| March 6, 2026 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (27) | — | — | 27 | Acquired |
| Dec. 4, 2025 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (31) | — | — | 31 | Acquired |
| Sept. 5, 2025 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (26) | — | — | 26 | Acquired |
| June 12, 2025 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (30) | — | — | 30 | Acquired |
| May 14, 2025 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (2,500) | — | — | 2,500 | Acquired |
| March 7, 2025 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (21) | — | — | 21 | Acquired |
| Dec. 5, 2024 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (18) | — | — | 18 | Acquired |
| Sept. 6, 2024 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (18) | — | — | 18 | Acquired |
| June 13, 2024 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (15) | — | — | 15 | Acquired |
| May 15, 2024 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (1,542) | — | — | 1,542 | Acquired |
| March 7, 2024 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (15) | — | — | 15 | Acquired |
| Dec. 7, 2023 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (17) | — | — | 17 | Acquired |
| Sept. 8, 2023 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (10) | — | — | 10 | Acquired |
| June 15, 2023 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (10) | — | — | 10 | Acquired |
| May 17, 2023 | MTX | PHANTOM STOCK UNITS | COMMON STOCK (2,067) | — | — | 2,067 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 14, 2019 | MTX | COMMON STOCK | 0 | Direct |