Erik Aldag

CIK 1954257 · View on SEC EDGAR ↗

Insider

First SEC filing: Nov. 29, 2022 · Latest: Jan. 27, 2026

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Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 13 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

13 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
April 30, 2025 MTX P 1,000 $50.37 $50,370 4,245 Direct +30.82% Acquired 40.3% (price as of 2026-08-20)

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.

Date Ticker Security Underlying Exercise price Expiration Shares A/D
Jan. 26, 2026 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,841) — — 1,841 Disposed
Jan. 23, 2026 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (2,243) — — 2,243 Disposed
Jan. 21, 2026 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (2,245) — — 2,245 Disposed
Jan. 20, 2026 MTX Employee Stock Option (Right to Buy) Common Stock (7,349) $66.23 Jan. 20, 2036 7,349 Acquired
Jan. 20, 2026 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (8,557) — — 8,557 Acquired

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

Initial ownership (Form 3) 18 holdings

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

Date Ticker Security Shares Ownership
Nov. 29, 2022 MTX COMMON STOCK 209 Direct
Nov. 29, 2022 MTX COMMON STOCK 369 Indirect
Nov. 29, 2022 MTX Employee Stock Option (Right to Buy)→ Common Stock (1,439) 1,439 Direct
Nov. 29, 2022 MTX Employee Stock Option (Right to Buy)→ Common Stock (2,777) 2,777 Direct
Nov. 29, 2022 MTX Employee Stock Option (Right to Buy)→ Common Stock (2,860) 2,860 Direct
Nov. 29, 2022 MTX Employee Stock Option (Right to Buy)→ Common Stock (1,301) 1,301 Direct
Nov. 29, 2022 MTX Employee Stock Option (Right to Buy)→ Common Stock (1,476) 1,476 Direct
Nov. 29, 2022 MTX Deferred Restricted Stock Units (DRSUs)→ Common Stock (505) 505 Direct
Nov. 29, 2022 MTX Deferred Restricted Stock Units (DRSUs)→ Common Stock (859) 859 Direct
Nov. 17, 2022 MTX COMMON STOCK 209 Direct
Nov. 17, 2022 MTX COMMON STOCK 1,189 Indirect
Nov. 17, 2022 MTX Employee Stock Option (Right to Buy)→ Common Stock (1,439) 1,439 Direct
Nov. 17, 2022 MTX Employee Stock Option (Right to Buy)→ Common Stock (2,777) 2,777 Direct
Nov. 17, 2022 MTX Employee Stock Option (Right to Buy)→ Common Stock (2,860) 2,860 Direct
Nov. 17, 2022 MTX Employee Stock Option (Right to Buy)→ Common Stock (1,301) 1,301 Direct
Nov. 17, 2022 MTX Employee Stock Option (Right to Buy)→ Common Stock (1,476) 1,476 Direct
Nov. 17, 2022 MTX Deferred Restricted Stock Units (DRSUs)→ Common Stock (505) 505 Direct
Nov. 17, 2022 MTX Deferred Restricted Stock Units (DRSUs)→ Common Stock (859) 859 Direct

Compensation (DEF 14A)

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

MTX

CFO
Fiscal year Salary Bonus Stock awards Option awards Non-equity incentive Pension change Other Total
2023 $450,000 — $364,998 $238,271 $448,088 — $24,157 $1,525,514
2022 $288,498 — $59,967 $35,806 $150,001 — $16,166 $550,437

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