Robert L Clark
Insider
First SEC filing: Jan. 6, 2010 · Latest: May 21, 2026
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 4, 2026 | MTX | A | 56 | · | · | 33,758 Direct | +0.17% | Acquired | (price as of 2026-10-02) |
| June 18, 2026 | MTX | A | 51 | · | · | 33,702 Direct | +0.15% | Acquired | (price as of 2026-10-02) |
| May 20, 2026 | MTX | A | 1,908 | · | · | 33,650 Direct | +6.01% | Acquired | (price as of 2026-10-02) |
| March 6, 2026 | MTX | A | 56 | · | · | 31,742 Direct | +0.18% | Acquired | (price as of 2026-10-02) |
| Dec. 4, 2025 | MTX | A | 65 | · | · | 31,686 Direct | +0.21% | Acquired | (price as of 2026-10-02) |
| Sept. 5, 2025 | MTX | A | 54 | · | · | 31,621 Direct | +0.17% | Acquired | (price as of 2026-10-02) |
| June 12, 2025 | MTX | A | 62 | · | · | 31,567 Direct | +0.20% | Acquired | (price as of 2026-10-02) |
| May 14, 2025 | MTX | A | 2,500 | · | · | 31,505 Direct | +8.62% | Acquired | (price as of 2026-10-02) |
| March 7, 2025 | MTX | A | 47 | · | · | 29,005 Direct | +0.16% | Acquired | (price as of 2026-10-02) |
| Dec. 5, 2024 | MTX | A | 40 | · | · | 28,958 Direct | +0.14% | Acquired | (price as of 2026-10-02) |
| Sept. 6, 2024 | MTX | A | 40 | · | · | 28,918 Direct | +0.14% | Acquired | (price as of 2026-10-02) |
| June 13, 2024 | MTX | A | 35 | · | · | 28,878 Direct | +0.12% | Acquired | (price as of 2026-10-02) |
| May 15, 2024 | MTX | A | 1,542 | · | · | 28,844 Direct | +5.65% | Acquired | (price as of 2026-10-02) |
| March 7, 2024 | MTX | A | 37 | · | · | 27,302 Direct | +0.14% | Acquired | (price as of 2026-10-02) |
| Dec. 7, 2023 | MTX | A | 43 | · | · | 27,264 Direct | +0.16% | Acquired | (price as of 2026-10-02) |
| Oct. 2, 2023 | MTX | A | 61 | · | · | 27,222 Direct | +0.22% | Acquired | (price as of 2026-10-02) |
| Sept. 8, 2023 | MTX | A | 25 | · | · | 27,161 Direct | +0.09% | Acquired | (price as of 2026-10-02) |
| July 3, 2023 | MTX | A | 57 | · | · | 27,136 Direct | +0.21% | Acquired | (price as of 2026-10-02) |
| June 15, 2023 | MTX | A | 24 | · | · | 27,080 Direct | +0.09% | Acquired | (price as of 2026-10-02) |
| May 17, 2023 | MTX | A | 2,067 | · | · | 27,056 Direct | +8.27% | Acquired | (price as of 2026-10-02) |
| April 3, 2023 | MTX | A | 54 | · | · | 24,989 Direct | +0.22% | Acquired | (price as of 2026-10-02) |
| March 9, 2023 | MTX | A | 21 | · | · | 24,935 Direct | +0.08% | Acquired | (price as of 2026-10-02) |
| Jan. 3, 2023 | MTX | A | 53 | · | · | 24,914 Direct | +0.21% | Acquired | (price as of 2026-10-02) |
| Dec. 8, 2022 | MTX | A | 20 | · | · | 24,861 Direct | +0.08% | Acquired | (price as of 2026-10-02) |
| Oct. 3, 2022 | MTX | A | 63 | · | · | 24,841 Direct | +0.25% | Acquired | (price as of 2026-10-02) |
| Sept. 9, 2022 | MTX | A | 20 | · | · | 24,778 Direct | +0.08% | Acquired | (price as of 2026-10-02) |
| July 1, 2022 | MTX | A | 53 | · | · | 24,758 Direct | +0.21% | Acquired | (price as of 2026-10-02) |
| June 16, 2022 | MTX | A | 21 | · | · | 24,705 Direct | +0.09% | Acquired | (price as of 2026-10-02) |
| May 18, 2022 | MTX | A | 1,759 | · | · | 24,684 Direct | +7.67% | Acquired | (price as of 2026-10-02) |
| April 1, 2022 | MTX | A | 49 | · | · | 22,925 Direct | +0.21% | Acquired | (price as of 2026-10-02) |
| March 10, 2022 | MTX | A | 18 | · | · | 22,876 Direct | +0.08% | Acquired | (price as of 2026-10-02) |
| Jan. 3, 2022 | MTX | A | 44 | · | · | 22,859 Direct | +0.19% | Acquired | (price as of 2026-10-02) |
| Dec. 9, 2021 | MTX | A | 16 | · | · | 22,814 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2021 | MTX | A | 45 | · | · | 22,798 Direct | +0.20% | Acquired | (price as of 2026-10-02) |
| Sept. 9, 2021 | MTX | A | 15 | · | · | 22,753 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
| July 1, 2021 | MTX | A | 45 | · | · | 22,738 Direct | +0.20% | Acquired | (price as of 2026-10-02) |
| June 17, 2021 | MTX | A | 14 | · | · | 22,693 Direct | +0.06% | Acquired | (price as of 2026-10-02) |
| May 19, 2021 | MTX | A | 1,318 | · | · | 22,679 Direct | +6.17% | Acquired | (price as of 2026-10-02) |
| April 1, 2021 | MTX | A | 34 | · | · | 21,360 Direct | +0.16% | Acquired | (price as of 2026-10-02) |
| March 11, 2021 | MTX | A | 14 | · | · | 21,326 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
| Jan. 4, 2021 | MTX | A | 42 | · | · | 21,313 Direct | +0.20% | Acquired | (price as of 2026-10-02) |
| Dec. 10, 2020 | MTX | A | 17 | · | · | 21,270 Direct | +0.08% | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2020 | MTX | A | 51 | · | · | 21,253 Direct | +0.24% | Acquired | (price as of 2026-10-02) |
| Sept. 3, 2020 | MTX | A | 21 | · | · | 21,202 Direct | +0.10% | Acquired | (price as of 2026-10-02) |
| July 1, 2020 | MTX | A | 58 | · | · | 21,181 Direct | +0.27% | Acquired | (price as of 2026-10-02) |
| June 11, 2020 | MTX | A | 23 | · | · | 21,123 Direct | +0.11% | Acquired | (price as of 2026-10-02) |
| May 13, 2020 | MTX | A | 2,606 | · | · | 21,100 Direct | +14.09% | Acquired | (price as of 2026-10-02) |
| April 1, 2020 | MTX | A | 80 | · | · | 18,494 Direct | +0.43% | Acquired | (price as of 2026-10-02) |
| March 5, 2020 | MTX | A | 21 | · | · | 18,414 Direct | +0.11% | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2020 | MTX | A | 46 | · | · | 18,393 Direct | +0.25% | Acquired | (price as of 2026-10-02) |
| Dec. 12, 2019 | MTX | A | 16 | · | · | 18,347 Direct | +0.09% | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2019 | MTX | A | 51 | · | · | 18,331 Direct | +0.28% | Acquired | (price as of 2026-10-02) |
| Sept. 5, 2019 | MTX | A | 18 | · | · | 18,280 Direct | +0.10% | Acquired | (price as of 2026-10-02) |
| July 1, 2019 | MTX | A | 49 | · | · | 18,261 Direct | +0.27% | Acquired | (price as of 2026-10-02) |
| June 13, 2019 | MTX | A | 16 | · | · | 18,219 Direct | +0.09% | Acquired | (price as of 2026-10-02) |
| May 15, 2019 | MTX | A | 1,902 | · | · | 18,204 Direct | +11.67% | Acquired | (price as of 2026-10-02) |
| April 1, 2019 | MTX | A | 44 | · | · | 16,295 Direct | +0.27% | Acquired | (price as of 2026-10-02) |
| April 1, 2019 | MTX | A | 47 | · | · | 16,302 Direct | +0.29% | Acquired | (price as of 2026-10-02) |
| March 14, 2019 | MTX | P | 200 | $58.64 | $11,728 | 400 Direct | +100.00% | Acquired | 13.3% (price as of 2026-10-02) |
| March 7, 2019 | MTX | A | 14 | · | · | 16,255 Direct | +0.09% | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2019 | MTX | A | 52 | · | · | 16,238 Direct | +0.32% | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2019 | MTX | A | 55 | · | · | 16,241 Direct | +0.34% | Acquired | (price as of 2026-10-02) |
| Dec. 7, 2018 | MTX | A | 16 | · | · | 16,186 Direct | +0.10% | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | MTX | A | 35 | · | · | 16,170 Direct | +0.22% | Acquired | (price as of 2026-10-02) |
| Sept. 6, 2018 | MTX | A | 12 | · | · | 16,135 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
| July 2, 2018 | MTX | A | 31 | · | · | 16,123 Direct | +0.19% | Acquired | (price as of 2026-10-02) |
| June 14, 2018 | MTX | A | 11 | · | · | 16,091 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
| May 16, 2018 | MTX | A | 1,381 | · | · | 16,081 Direct | +9.39% | Acquired | (price as of 2026-10-02) |
| May 16, 2018 | MTX | A | 1,344 | · | · | 16,044 Direct | +9.14% | Acquired | (price as of 2026-10-02) |
| April 2, 2018 | MTX | A | 36 | · | · | 14,700 Direct | +0.25% | Acquired | (price as of 2026-10-02) |
| March 8, 2018 | MTX | A | 10 | · | · | 14,663 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2018 | MTX | A | 34 | · | · | 14,653 Direct | +0.23% | Acquired | (price as of 2026-10-02) |
| Dec. 8, 2017 | MTX | A | 11 | · | · | 14,619 Direct | +0.08% | Acquired | (price as of 2026-10-02) |
| Oct. 2, 2017 | MTX | A | 33 | · | · | 14,608 Direct | +0.23% | Acquired | (price as of 2026-10-02) |
| Sept. 7, 2017 | MTX | A | 12 | · | · | 14,575 Direct | +0.08% | Acquired | (price as of 2026-10-02) |
| July 3, 2017 | MTX | A | 32 | · | · | 14,564 Direct | +0.22% | Acquired | (price as of 2026-10-02) |
| June 9, 2017 | MTX | A | 10 | · | · | 14,532 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
| May 17, 2017 | MTX | A | 1,381 | · | · | 14,522 Direct | +10.51% | Acquired | (price as of 2026-10-02) |
| April 3, 2017 | MTX | A | 31 | · | · | 13,141 Direct | +0.24% | Acquired | (price as of 2026-10-02) |
| March 9, 2017 | MTX | A | 9 | · | · | 13,109 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
| Jan. 3, 2017 | MTX | A | 31 | · | · | 13,100 Direct | +0.24% | Acquired | (price as of 2026-10-02) |
| Dec. 9, 2016 | MTX | A | 8 | · | · | 13,070 Direct | +0.06% | Acquired | (price as of 2026-10-02) |
| Oct. 3, 2016 | MTX | A | 34 | · | · | 13,062 Direct | +0.26% | Acquired | (price as of 2026-10-02) |
| Sept. 8, 2016 | MTX | A | 9 | · | · | 13,028 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
| July 1, 2016 | MTX | A | 41 | · | · | 13,018 Direct | +0.32% | Acquired | (price as of 2026-10-02) |
| June 9, 2016 | MTX | A | 11 | · | · | 12,977 Direct | +0.08% | Acquired | (price as of 2026-10-02) |
| May 11, 2016 | MTX | A | 1,496 | · | · | 12,966 Direct | +13.04% | Acquired | (price as of 2026-10-02) |
| April 1, 2016 | MTX | A | 42 | · | · | 11,470 Direct | +0.37% | Acquired | (price as of 2026-10-02) |
| March 10, 2016 | MTX | A | 11 | · | · | 11,429 Direct | +0.10% | Acquired | (price as of 2026-10-02) |
| Jan. 4, 2016 | MTX | A | 55 | · | · | 11,418 Direct | +0.48% | Acquired | (price as of 2026-10-02) |
| Dec. 10, 2015 | MTX | A | 10 | · | · | 11,363 Direct | +0.09% | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2015 | MTX | A | 49 | · | · | 11,353 Direct | +0.43% | Acquired | (price as of 2026-10-02) |
| Sept. 10, 2015 | MTX | A | 11 | · | · | 11,304 Direct | +0.10% | Acquired | (price as of 2026-10-02) |
| July 1, 2015 | MTX | A | 35 | · | · | 11,293 Direct | +0.31% | Acquired | (price as of 2026-10-02) |
| June 10, 2015 | MTX | A | 8 | · | · | 11,258 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
| May 13, 2015 | MTX | A | 1,177 | · | · | 11,250 Direct | +11.68% | Acquired | (price as of 2026-10-02) |
| April 1, 2015 | MTX | A | 32 | · | · | 10,073 Direct | +0.32% | Acquired | (price as of 2026-10-02) |
| March 11, 2015 | MTX | A | 7 | · | · | 10,041 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2015 | MTX | A | 35 | · | · | 10,034 Direct | +0.35% | Acquired | (price as of 2026-10-02) |
| Dec. 11, 2014 | MTX | A | 7 | · | · | 9,999 Direct | +0.07% | Acquired | (price as of 2026-10-02) |
Showing latest 100 of 146 transactions
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 |
|---|---|---|---|---|---|---|---|
| Sept. 4, 2026 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 56 | Acquired |
| June 18, 2026 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 51 | Acquired |
| May 20, 2026 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 1,908 | Acquired |
| March 6, 2026 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 56 | Acquired |
| Dec. 4, 2025 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 65 | Acquired |
| Sept. 5, 2025 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 54 | Acquired |
| June 12, 2025 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 62 | Acquired |
| May 14, 2025 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 2,500 | Acquired |
| March 7, 2025 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 47 | Acquired |
| Dec. 5, 2024 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 40 | Acquired |
| Sept. 6, 2024 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 40 | Acquired |
| June 13, 2024 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 35 | Acquired |
| May 15, 2024 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 1,542 | Acquired |
| March 7, 2024 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 37 | Acquired |
| Dec. 7, 2023 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 43 | Acquired |
| Oct. 2, 2023 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 61 | Acquired |
| Sept. 8, 2023 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 25 | Acquired |
| July 3, 2023 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 57 | Acquired |
| June 15, 2023 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 24 | Acquired |
| May 17, 2023 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 2,067 | Acquired |
| April 3, 2023 | MTX | PHANTOM STOCK UNITS | COMMON STOCK | · | · | 54 | Acquired |
| March 9, 2023 | MTX | Phantom Stock Units | Common Stock | · | · | 21 | Acquired |
| Jan. 3, 2023 | MTX | Phantom Stock Units | Common Stock | · | · | 53 | Acquired |
| Dec. 8, 2022 | MTX | Phantom Stock Units | Common Stock | · | · | 20 | Acquired |
| Oct. 3, 2022 | MTX | Phantom Stock Units | Common Stock | · | · | 63 | Acquired |
| Sept. 9, 2022 | MTX | Phantom Stock Units | Common Stock | · | · | 20 | Acquired |
| July 1, 2022 | MTX | Phantom Stock Units | Common Stock | · | · | 53 | Acquired |
| June 16, 2022 | MTX | Phantom Stock Units | Common Stock | · | · | 21 | Acquired |
| May 18, 2022 | MTX | Phantom Stock Units | Common Stock | · | · | 1,759 | Acquired |
| April 1, 2022 | MTX | Phantom Stock Units | Common Stock | · | · | 49 | Acquired |
| March 10, 2022 | MTX | Phantom Stock Units | Common Stock | · | · | 18 | Acquired |
| Jan. 3, 2022 | MTX | Phantom Stock Units | Common Stock | · | · | 44 | Acquired |
| Dec. 9, 2021 | MTX | Phantom Stock Units | Common Stock | · | · | 16 | Acquired |
| Oct. 1, 2021 | MTX | Phantom Stock Units | Common Stock | · | · | 45 | Acquired |
| Sept. 9, 2021 | MTX | Phantom Stock Units | Common Stock | · | · | 15 | Acquired |
| July 1, 2021 | MTX | Phantom Stock Units | Common Stock | · | · | 45 | Acquired |
| June 17, 2021 | MTX | Phantom Stock Units | Common Stock | · | · | 14 | Acquired |
| May 19, 2021 | MTX | Phantom Stock Units | Common Stock | · | · | 1,318 | Acquired |
| April 1, 2021 | MTX | Phantom Stock Units | Common Stock | · | · | 34 | Acquired |
| March 11, 2021 | MTX | Phantom Stock Units | Common Stock | · | · | 14 | Acquired |
| Jan. 4, 2021 | MTX | Phantom Stock Units | Common Stock | · | · | 42 | Acquired |
| Dec. 10, 2020 | MTX | Phantom Stock Units | Common Stock | · | · | 17 | Acquired |
| Oct. 1, 2020 | MTX | Phantom Stock Units | Common Stock | · | · | 51 | Acquired |
| Sept. 3, 2020 | MTX | Phantom Stock Units | Common Stock | · | · | 21 | Acquired |
| July 1, 2020 | MTX | Phantom Stock Units | Common Stock | · | · | 58 | Acquired |
| June 11, 2020 | MTX | Phantom Stock Units | Common Stock | · | · | 23 | Acquired |
| May 13, 2020 | MTX | Phantom Stock Units | Common Stock | · | · | 2,606 | Acquired |
| April 1, 2020 | MTX | Phantom Stock Units | Common Stock | · | · | 80 | Acquired |
| March 5, 2020 | MTX | Phantom Stock Units | Common Stock | · | · | 21 | Acquired |
| Jan. 2, 2020 | MTX | Phantom Stock Units | Common Stock | · | · | 46 | Acquired |
| Dec. 12, 2019 | MTX | Phantom Stock Units | Common Stock | · | · | 16 | Acquired |
| Oct. 1, 2019 | MTX | Phantom Stock Units | Common Stock | · | · | 51 | Acquired |
| Sept. 5, 2019 | MTX | Phantom Stock Units | Common Stock | · | · | 18 | Acquired |
| July 1, 2019 | MTX | Phantom Stock Units | Common Stock | · | · | 49 | Acquired |
| June 13, 2019 | MTX | Phantom Stock Units | Common Stock | · | · | 16 | Acquired |
| May 15, 2019 | MTX | Phantom Stock Units | Common Stock | · | · | 1,902 | Acquired |
| April 1, 2019 | MTX | Phantom Stock Units | Common Stock | · | · | 44 | Acquired |
| April 1, 2019 | MTX | Phantom Stock Units | Common Stock | · | · | 47 | Acquired |
| March 7, 2019 | MTX | Phantom Stock Units | Common Stock | · | · | 14 | Acquired |
| Jan. 2, 2019 | MTX | Phantom Stock Units | Common Stock | · | · | 52 | Acquired |
| Jan. 2, 2019 | MTX | Phantom Stock Units | Common Stock | · | · | 55 | Acquired |
| Dec. 7, 2018 | MTX | Phantom Stock Units | Common Stock | · | · | 16 | Acquired |
| Oct. 1, 2018 | MTX | Phantom Stock Units | Common Stock | · | · | 35 | Acquired |
| Sept. 6, 2018 | MTX | Phantom Stock Units | Common Stock | · | · | 12 | Acquired |
| July 2, 2018 | MTX | Phantom Stock Units | Common Stock | · | · | 31 | Acquired |
| June 14, 2018 | MTX | Phantom Stock Units | Common Stock | · | · | 11 | Acquired |
| May 16, 2018 | MTX | Phantom Stock Units | Common Stock | · | · | 1,381 | Acquired |
| May 16, 2018 | MTX | Phantom Stock Units | Common Stock | · | · | 1,344 | Acquired |
| April 2, 2018 | MTX | Phantom Stock Units | Common Stock | · | · | 36 | Acquired |
| March 8, 2018 | MTX | Phantom Stock Units | Common Stock | · | · | 10 | Acquired |
| Jan. 2, 2018 | MTX | Phantom Stock Units | Common Stock | · | · | 34 | Acquired |
| Dec. 8, 2017 | MTX | Phantom Stock Units | Common Stock | · | · | 11 | Acquired |
| Oct. 2, 2017 | MTX | Phantom Stock Units | Common Stock | · | · | 33 | Acquired |
| Sept. 7, 2017 | MTX | Phantom Stock Units | Common Stock | · | · | 12 | Acquired |
| July 3, 2017 | MTX | Phantom Stock Units | Common Stock | · | · | 32 | Acquired |
| June 9, 2017 | MTX | Phantom Stock Units | Common Stock | · | · | 10 | Acquired |
| May 17, 2017 | MTX | Phantom Stock Units | Common Stock | · | · | 1,381 | Acquired |
| April 3, 2017 | MTX | Phantom Stock Units | Common Stock | · | · | 31 | Acquired |
| March 9, 2017 | MTX | Phantom Stock Units | Common Stock | · | · | 9 | Acquired |
| Jan. 3, 2017 | MTX | Phantom Stock Units | Common Stock | · | · | 31 | Acquired |
| Dec. 9, 2016 | MTX | Phantom Stock Units | Common Stock | · | · | 8 | Acquired |
| Oct. 3, 2016 | MTX | Phantom Stock Units | Common Stock | · | · | 34 | Acquired |
| Sept. 8, 2016 | MTX | Phantom Stock Units | Common Stock | · | · | 9 | Acquired |
| July 1, 2016 | MTX | Phantom Stock Units | Common Stock | · | · | 41 | Acquired |
| June 9, 2016 | MTX | Phantom Stock Units | Common Stock | · | · | 11 | Acquired |
| May 11, 2016 | MTX | Phantom Stock Units | Common Stock | · | · | 1,496 | Acquired |
| April 1, 2016 | MTX | Phantom Stock Units | Common Stock | · | · | 42 | Acquired |
| March 10, 2016 | MTX | Phantom Stock Units | Common Stock | · | · | 11 | Acquired |
| Jan. 4, 2016 | MTX | Phantom Stock Units | Common Stock | · | · | 55 | Acquired |
| Dec. 10, 2015 | MTX | Phantom Stock Units | Common Stock | · | · | 10 | Acquired |
| Oct. 1, 2015 | MTX | Phantom Stock Units | Common Stock | · | · | 49 | Acquired |
| Sept. 10, 2015 | MTX | Phantom Stock Units | Common Stock | · | · | 11 | Acquired |
| July 1, 2015 | MTX | Phantom Stock Units | Common Stock | · | · | 35 | Acquired |
| June 10, 2015 | MTX | Phantom Stock Units | Common Stock | · | · | 8 | Acquired |
| May 13, 2015 | MTX | Phantom Stock Units | Common Stock | · | · | 1,177 | Acquired |
| April 1, 2015 | MTX | Phantom Stock Units | Common Stock | · | · | 32 | Acquired |
| March 11, 2015 | MTX | Phantom Stock Units | Common Stock | · | · | 7 | Acquired |
| Jan. 2, 2015 | MTX | Phantom Stock Units | Common Stock | · | · | 35 | Acquired |
| Dec. 11, 2014 | MTX | Phantom Stock Units | Common Stock | · | · | 7 | Acquired |
| Oct. 1, 2014 | MTX | Phantom Stock Units | Common Stock | · | · | 37 | Acquired |
Showing latest 100 of 144 transactions
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 |
|---|---|---|---|---|
| Jan. 6, 2010 | MTX | Common Stock | 0 | Direct |