Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 2 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

No open-market trades on record; showing all filings.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Jan. 26, 2011 MTX A 1,862 · · 1,862 Direct · Acquired (price as of 2026-10-05)
Jan. 26, 2011 MTX A 5,136 · · 5,136 Direct · Acquired (price as of 2026-10-05)

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
Jan. 26, 2011 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,862) · · 1,862 Acquired
Jan. 26, 2011 MTX Employee Stock Option (Right to Buy) Common Stock (5,136) $64.46 Jan. 26, 2021 5,136 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
Dec. 8, 2010 MTX Common Stock 0 Direct