Axcelis Technologies Interim CFO David Ryzhik's Restricted Stock Vesting and Tax Withholding

David Ryzhik, SVP and Interim CFO of Axcelis Technologies Inc (ACLS), filed a Form 4 reporting a transaction on June 16, 2026. The filing discloses the vesting of service-based restricted stock units granted in June 2025, resulting in a forfeiture of 76 shares for tax withholding purposes. The shares were disposed of at $176.845 per share, which represents the closing price of ACLS common stock on that date. Following this transaction, Ryzhik holds 9,955 shares of common stock, of which 8,439 shares are issuable upon vesting of restricted stock units and remain subject to forfeiture under the company's 2012 Equity Incentive Plan. The transaction is a routine tax withholding event related to equity compensation vesting rather than a discretionary sale by the executive.