Form 4 Filing for Jeanne Quirk - AXCELIS TECHNOLOGIES INC

Jeanne Quirk, a director at AXCELIS TECHNOLOGIES INC, reported a sale of 1,789 shares of Common Stock on May 19, 2026, at a price of $140.22 per share. This transaction resulted in a post-transaction share ownership of 11,400 shares. A footnote indicates that 1,440 of the shares held after this sale were subject to forfeiture, having been issued upon vesting of restricted stock units granted under the 2012 Equity Incentive Plan. The filing was signed by Eileen J. Evans as Attorney-in-Fact on May 20, 2026.