Allegro Microsystems CEO Michael Doogue Sells 60,508 Shares for Tax Withholding

This Form 4 filing reports that Michael C. Doogue, President and CEO of Allegro Microsystems, Inc., sold 60,508 shares of common stock on May 16, 2026. The shares were disposed of at a price of $43.10 per share, resulting in total proceeds of approximately $2.61 million. The transaction was coded as "F" (tax withholding) and represents shares withheld to cover taxes due upon the vesting of restricted stock units and performance-vesting restricted stock units previously granted by the company. Following this transaction, Doogue directly owns 279,076 shares, while indirectly holds an additional 252,797 shares through the Michael C. Doogue Revocable Trust of 2015, bringing his total beneficial ownership to 531,873 shares. The filing was signed by Raymond Myer as Attorney-in-Fact for Michael C. Doogue on May 19, 2026.