Gerald M. Blumenstock Insider Transaction Report

This report details insider transactions by Gerald M. Blumenstock, EVP of Research, Development & Engineering at Axcelis Technologies Inc. On May 15, 2026, Blumenstock acquired 2,725 shares of common stock through the vesting of restricted stock units under the 2012 Equity Incentive Plan, with a reported transaction price of $0.0. These acquisitions increased his holdings to 20,018 and 22,743 shares, respectively, subject to forfeiture. Additionally, Blumenstock disposed of 744 shares and 345 shares of common stock due to tax withholding obligations upon vesting of restricted stock units. These dispositions occurred at a price of $155.18 per share, reducing his post-transaction holdings to 21,999 and 21,654 shares, respectively. The transactions are linked to various equity incentive plans and vesting schedules, with some shares subject to forfeiture based on continued employment and performance metrics.