Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 60 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

60 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
May 22, 2007 MTX S 3,414 $67.85 $231,640 0 Indirect -100.00% Disposed 95.8% (price as of 2026-10-02)
May 3, 2007 MTX S 40,000 $65.86 $2,634,400 31,674 Direct -55.81% Disposed 101.7% (price as of 2026-10-02)
Nov. 10, 2006 MTX S 15,000 $55.59 $833,850 26,770 Direct -35.91% Disposed 139.0% (price as of 2026-10-02)
Nov. 10, 2006 MTX S 15,000 $55.59 $833,850 27,070 Direct -35.65% Disposed 139.0% (price as of 2026-10-02)
May 4, 2005 MTX S 915 $67.39 $61,662 25,460 Direct -3.47% Disposed 97.2% (price as of 2026-10-02)
May 4, 2005 MTX S 4,100 $67.30 $275,930 25,460 Direct -13.87% Disposed 97.4% (price as of 2026-10-02)
May 4, 2005 MTX S 915 $67.39 $61,662 25,460 Direct -3.47% Disposed 97.2% (price as of 2026-10-02)
May 4, 2005 MTX S 4,100 $67.30 $275,930 25,460 Direct -13.87% Disposed 97.4% (price as of 2026-10-02)
Nov. 4, 2004 MTX S 12,000 $59.48 $713,760 23,960 Direct -33.37% Disposed 123.4% (price as of 2026-10-02)
April 1, 2004 MTX S 15,000 $57.96 $869,400 23,960 Direct -38.50% Disposed 129.2% (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 7, 2007 MTX Employee Stock Option (Right to Buy) Common Stock (3,550) $49.12 July 1, 2013 3,550 Disposed
May 4, 2007 MTX Employee Stock Option (Right to Buy) Common Stock (5,742) $34.83 March 16, 2011 5,742 Disposed
May 4, 2007 MTX Employee Stock Option (Right to Buy) Common Stock (1,649) $46.63 Jan. 24, 2012 1,649 Disposed
May 3, 2007 MTX Employee Stock Option (Right to Buy) Common Stock (40,000) $39.53 Jan. 28, 2009 40,000 Disposed
Feb. 22, 2007 MTX Deferred Restricted Stock Units ("DRSUs") COMMON STOCK (5,000) · · 5,000 Disposed
Feb. 22, 2007 MTX Deferred Restricted Stock Units ("DRSUs") COMMON STOCK (5,000) · · 5,000 Disposed
Nov. 10, 2006 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (6,087) $39.53 · 6,087 Disposed
Nov. 10, 2006 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (15,000) $39.53 · 15,000 Disposed
Nov. 10, 2006 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (6,087) $39.53 · 6,087 Disposed
Nov. 10, 2006 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (15,000) $39.53 · 15,000 Disposed
Feb. 22, 2006 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (23,100) · Feb. 22, 2016 23,100 Acquired
Feb. 22, 2006 MTX DEFERRED STOCK COMMON STOCK (15,000) · · 15,000 Acquired
Feb. 22, 2006 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (23,100) $53.79 Feb. 22, 2016 23,100 Acquired
May 4, 2005 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (3,000) $30.62 · 3,000 Disposed
May 4, 2005 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (915) $30.62 · 915 Disposed
May 4, 2005 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (4,100) $30.62 · 4,100 Disposed
May 4, 2005 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (915) $30.62 · 915 Disposed
May 4, 2005 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (4,100) $30.62 · 4,100 Disposed
Feb. 23, 2005 MTX DEFERRED STOCK COMMON STOCK (11,700) · · 11,700 Acquired
Feb. 23, 2005 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (17,300) $61.94 · 17,300 Acquired
Nov. 4, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (1,500) $39.53 · 1,500 Disposed
Nov. 4, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (12,000) $30.63 · 12,000 Disposed
April 1, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (18,794) $30.63 · 18,794 Disposed
Feb. 25, 2004 MTX DEFERRED STOCK COMMON STOCK (8,600) · Feb. 25, 2009 8,600 Acquired
Feb. 25, 2004 MTX EMPLOYEE STOCK OPTION (RIGHT TO BUY) COMMON STOCK (24,600) $53.89 · 24,600 Acquired
Dec. 31, 2003 MTX PHANTOM STOCK UNITS COMMON STOCK (179) · · 179 Acquired
Nov. 5, 2003 MTX DEFERRED STOCK [F1] COMMON STOCK (7,900) · July 1, 2008 7,900 Acquired

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

Compensation (DEF 14A)

08

Matched by name from proxy statements (DEF 14A) — verify against the filing.

MTX

President & CEO
Fiscal yearSalaryBonusStock awards Option awardsNon-equity incentivePension changeOtherTotal
2005 $673,750,631,712,563,456 $420,900,317,000 $723,177,462,078,427,392 · · · $435,464,179,530,541 ·
2004 $631,712,563,462,546,176 $420,900,317,000,200,064 · · · · · ·

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.