D'Alterio Gennaro A. 4

What Happened

• Gennaro A. D'Alterio, EVP & Chief Commercial Officer of Mistras Group, had 184 shares withheld to satisfy tax obligations when restricted stock units vested. The withholding is reported as a disposition at $15.68 per share, totaling approximately $2,885. This was a tax-withholding event, not an open-market sale or purchase.

Key Details

• Transaction date: 2026-03-04; reported filing date: 2026-03-10 (filed 6 days after the transaction — outside the standard 2-business-day Form 4 window).
• Price: $15.68 per share; Shares withheld/disposed: 184; Reported value: $2,885.
• Shares owned after transaction: not specified in the provided filing.
• Footnote: F1 — shares were withheld to pay taxes upon vesting of restricted stock units (routine tax withholding).
• Transaction code: F (tax withholding), a disposition for tax purposes rather than an economic sale.

Context

• Tax-withholding on vested RSUs is a common administrative action and does not necessarily signal insider buying or selling intent; it simply covers tax withholding obligations when equity awards vest.