Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 91 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

91 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
May 10, 2010 MTX S 5,742 $56.44 $324,078 23,795 Direct -19.44% Disposed 134.6% (price as of 2026-10-05)
Dec. 4, 2009 MTX S 4,258 $53.10 $226,100 17,089 Direct -19.95% Disposed 149.3% (price as of 2026-10-05)
May 9, 2008 MTX S 4,990 $69.11 $344,859 9,540 Direct -34.34% Disposed 91.6% (price as of 2026-10-05)
Feb. 28, 2008 MTX S 460 $62.22 $28,621 7,526 Direct -5.76% Disposed 112.8% (price as of 2026-10-05)
May 31, 2007 MTX S 4,289 $63.61 $272,823 2,526 Indirect -62.93% Disposed 108.1% (price as of 2026-10-05)
March 16, 2007 MTX S 15,000 $60.90 $913,500 6,619 Direct -69.38% Disposed 117.4% (price as of 2026-10-05)
Nov. 11, 2004 MTX S 9,031 $62.90 $568,050 3,710 Direct -70.88% Disposed 110.5% (price as of 2026-10-05)
Nov. 11, 2004 MTX S 9,041 $62.90 $568,679 3,700 Direct -70.96% Disposed 110.5% (price as of 2026-10-05)
Nov. 11, 2004 MTX S 9,031 $62.90 $568,050 3,710 Direct -70.88% Disposed 110.5% (price as of 2026-10-05)

Showing latest 100 of 104 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.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
Feb. 27, 2011 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (2,000) · · 2,000 Disposed
Jan. 28, 2011 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (3,233) · · 3,233 Disposed
Jan. 27, 2011 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (2,600) · · 2,600 Disposed
May 10, 2010 MTX Employee Stock Option (Right to Buy) Common Stock (5,742) $34.83 · 5,742 Disposed
March 1, 2010 MTX DRSUs Common Stock (1,833) · · 1,833 Disposed
March 1, 2010 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (2,000) · · 2,000 Disposed
Feb. 23, 2010 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (3,600) · · 3,600 Disposed
Jan. 28, 2010 MTX DRSUs Common Stock (3,234) · · 3,234 Disposed
Jan. 27, 2010 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (7,800) · · 7,800 Acquired
Jan. 27, 2010 MTX Employee Stock Option (Right to Buy) Common Stock (13,325) $49.12 Jan. 27, 2020 13,325 Acquired
Dec. 4, 2009 MTX Employee Stock Option (Right to Buy) Common Stock (4,258) $34.83 March 16, 2011 4,258 Disposed
March 2, 2009 MTX DRSUs Common Stock (1,833) · · 1,833 Disposed
Feb. 27, 2009 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (2,000) · · 2,000 Disposed
Feb. 25, 2009 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (3,100) · · 3,100 Disposed
Feb. 23, 2009 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (1,366) · · 1,366 Disposed
Jan. 28, 2009 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (9,700) · · 9,700 Acquired
Jan. 28, 2009 MTX Employee Stock Option (Right to Buy) Common Stock (16,700) $39.71 Jan. 28, 2019 16,700 Acquired
July 1, 2008 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (3,100) · · 3,100 Disposed
May 9, 2008 MTX Employee Stock Option (Right to Buy) Common Stock (4,990) $39.53 Jan. 28, 2009 4,990 Disposed
May 7, 2008 MTX Employee Stock Option (Right to Buy) Common Stock (1,873) $39.53 Jan. 28, 2009 1,873 Disposed
Feb. 28, 2008 MTX DRSUs Common Stock (1,834) · · 1,834 Disposed
Feb. 27, 2008 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (6,000) · · 6,000 Acquired
Feb. 27, 2008 MTX Employee Stock Option (Right to Buy) Common Stock (10,300) $64.16 Feb. 27, 2018 10,300 Acquired
Feb. 22, 2008 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (1,367) · · 1,367 Disposed
March 16, 2007 MTX Employee Stock Option (Right to Buy) Common Stock (15,000) $39.53 Jan. 28, 2009 15,000 Disposed
March 14, 2007 MTX Employee Stock Option (Right to Buy) Common Stock (5,714) $39.53 Jan. 28, 2009 5,714 Disposed
Feb. 28, 2007 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (5,500) · · 5,500 Acquired
Feb. 28, 2007 MTX Employee Stock Option (Right to Buy) Common Stock (8,900) $61.56 Feb. 28, 2017 8,900 Acquired
Feb. 22, 2007 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (1,367) · · 1,367 Disposed
Feb. 22, 2007 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (1,367) · · 1,367 Disposed
Feb. 22, 2007 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (1,367) · · 1,367 Disposed
Feb. 22, 2006 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) Common Stock (6,300) · Feb. 22, 2016 6,300 Acquired
Feb. 22, 2006 MTX DEFERRED STOCK COMMON STOCK (4,100) · · 4,100 Acquired
Feb. 22, 2006 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (6,300) $53.79 Feb. 22, 2016 6,300 Acquired
Feb. 23, 2005 MTX DEFERRED STOCK COMMON STOCK (3,600) · · 3,600 Acquired
Feb. 23, 2005 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (5,400) $61.94 · 5,400 Acquired
Nov. 11, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (12,041) $30.62 · 12,041 Disposed
Nov. 11, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (12,041) $30.62 · 12,041 Disposed
Nov. 11, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (12,041) $30.62 · 12,041 Disposed
Feb. 25, 2004 MTX DEFERRED STOCK COMMON STOCK (3,100) · Feb. 25, 2009 3,100 Acquired
Feb. 25, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (8,800) $53.89 · 8,800 Acquired
Feb. 25, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (8,800) $53.89 · 8,800 Acquired
Feb. 25, 2004 MTX DEFERRED STOCK COMMON STOCK (3,100) · Feb. 25, 2009 3,100 Acquired
Feb. 25, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (8,200) $53.89 · 8,200 Acquired
Feb. 25, 2004 MTX DEFERRED STOCK COMMON STOCK (2,900) · Feb. 25, 2009 2,900 Acquired
Dec. 31, 2003 MTX PHANTOM STOCK UNITS COMMON STOCK (130) · · 130 Acquired
Dec. 31, 2003 MTX PHANTOM STOCK UNITS COMMON STOCK (130) · · 130 Acquired
Dec. 31, 2003 MTX PHANTOM STOCK UNITS COMMON STOCK (130) · · 130 Acquired
Nov. 5, 2003 MTX DEFERRED STOCK [F1] COMMON STOCK (3,100) · · 3,100 Acquired

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

Initial ownership (Form 3) 1 holding

07

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

DateTickerSecuritySharesOwnership
April 2, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY)→ COMMON STOCK · Direct