Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 28 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

28 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
June 22, 2007 MTX S 1,975 $63.96 $126,321 0 Indirect -100.00% Disposed 107.7% (price as of 2026-10-02)
May 2, 2007 MTX S 3,200 $65.50 $209,600 703 Direct -81.99% Disposed 102.8% (price as of 2026-10-02)
March 11, 2005 MTX S 3,000 $62.87 $188,610 500 Direct -85.71% Disposed 111.3% (price as of 2026-10-02)
Aug. 30, 2004 MTX S 500 $56.29 $28,145 200 Direct -71.43% Disposed 136.0% (price as of 2026-10-02)
Aug. 30, 2004 MTX S 165 $56.29 $9,288 200 Direct -45.21% Disposed 136.0% (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.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
May 2, 2007 MTX Employee Stock Option (Right to Buy) Common Stock (3,200) $39.53 Jan. 28, 2009 3,200 Disposed
Feb. 28, 2007 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (1,300) · · 1,300 Acquired
Feb. 28, 2007 MTX Employee Stock Option (Right to Buy) Common Stock (2,100) $61.56 Feb. 28, 2017 2,100 Acquired
Feb. 22, 2007 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (334) · · 334 Disposed
Feb. 22, 2007 MTX Deferred Restricted Stock Units ("DRSUs") COMMON STOCK (334) · · 334 Disposed
Feb. 22, 2007 MTX Deferred Restricted Stock Units ("DRSUs") COMMON STOCK (334) · · 334 Disposed
Feb. 22, 2006 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (1,600) · Feb. 22, 2016 1,600 Acquired
Feb. 22, 2006 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (1,600) $53.79 Feb. 22, 2016 1,600 Acquired
Feb. 22, 2006 MTX DEFERRED STOCK COMMON STOCK (1,000) · · 1,000 Acquired
March 11, 2005 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (3,300) $39.53 · 3,300 Disposed
Feb. 23, 2005 MTX DEFERRED STOCK COMMON STOCK (800) · · 800 Acquired
Feb. 23, 2005 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (1,200) $61.94 · 1,200 Acquired
Aug. 30, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (365) $39.53 · 365 Disposed
Aug. 30, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (500) $43.38 · 500 Disposed
Feb. 25, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (1,900) $53.89 · 1,900 Acquired
Feb. 25, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (1,900) $53.89 · 1,900 Acquired
Feb. 25, 2004 MTX DEFERRED STOCK COMMON STOCK (700) · Feb. 25, 2009 700 Acquired

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

Initial ownership (Form 3) 4 holdings

07

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

DateTickerSecuritySharesOwnership
Feb. 2, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY)→ COMMON STOCK (500) 500 Direct
Feb. 2, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY)→ COMMON STOCK (6,865) 6,865 Direct
Feb. 2, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY)→ COMMON STOCK (437) 437 Direct
Feb. 2, 2004 MTX PHANTOM STOCK→ COMMON STOCK (1,488) 1,488 Direct