D'Antilio Derek 4

What Happened
Derek D'Antilio, EVP, CFO & Treasurer of Allegro Microsystems (ALGM), had 37,840 shares withheld on May 16, 2026 to satisfy tax withholding obligations related to the vesting of restricted stock units (RSUs). The shares were valued at $43.10 each, for a notional amount of $1,630,904. This is a routine tax-withholding disposition (not an open-market sale or new purchase).

Key Details

• Transaction date: 2026-05-16; Filing date (Form 4): 2026-05-19 (appears timely under the 2-business-day rule).
• Disposed/withheld: 37,840 shares at $43.10 per share; total value ≈ $1,630,904.
• Shares owned after transaction: Not specified in the provided filing excerpt.
• Transaction code: F — shares withheld to cover tax liability on vested RSUs. Footnote: "Represents shares withheld to cover taxes due upon the vesting of restricted stock units and performance-vesting restricted stock units that were previously granted by the Issuer."
• This was a withholding to satisfy taxes (cashless tax withholding), not an indication of a discretionary sale.

Context
Tax-withholding when RSUs vest is common for executives and is generally administrative: the company retains (or sells) a portion of shares to cover tax obligations. Such transactions are routine and do not necessarily reflect the insider’s view on the company’s stock.