Insider at

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Insider transactions

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0 buys (P) 0 sells (S) Net: $0 + 17 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

17 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Aug. 23, 2016 MTX S 3,648 $70.77 $258,169 0 Indirect -100.00% Disposed -6.1% (price as of 2026-10-02)
Aug. 22, 2016 MTX S 5,467 $70.57 $385,806 1,194 Direct -82.07% Disposed -5.9% (price as of 2026-10-02)

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.

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DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
Aug. 22, 2016 MTX Employee Stock Option (Right to Buy) Common Stock (2,327) $61.83 May 21, 2024 2,327 Disposed
Aug. 22, 2016 MTX Employee Stock Option (Right to Buy) Common Stock (1,947) $60.18 Jan. 20, 2025 1,947 Disposed
May 23, 2016 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (647) · · 647 Disposed
Jan. 20, 2016 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (2,355) · · 2,355 Disposed
Jan. 19, 2016 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (5,224) · · 5,224 Acquired
Jan. 19, 2016 MTX Employee Stock Option (Right to Buy) Common Stock (9,028) $38.28 Jan. 19, 2026 9,028 Acquired
May 21, 2015 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (647) · · 647 Disposed
Jan. 20, 2015 MTX Employee Stock Option (Right to Buy) Common Stock (5,841) $60.18 Jan. 20, 2025 5,841 Acquired
Jan. 20, 2015 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (7,062) · · 7,062 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 3 holdings

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Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
May 22, 2014 MTX Common Stock 0 Direct
May 22, 2014 MTX Employee Stock Option (Right to Buy)→ Common Stock (3,490) 3,490 Direct
May 22, 2014 MTX Deferred Restricted Stock Units (DRSUs)→ Common Stock (1,941) 1,941 Direct