Blumenstock Gerald M 4

What Happened

• Gerald M. Blumenstock, Executive Vice President, Research, Development & Engineering at Axcelis Technologies, forfeited 1,121 shares on March 2, 2026 to satisfy tax withholding obligations related to the vesting of performance-based restricted stock units (2024 PRSUs). The withholding value was $97,056, based on the closing price of $86.58 on March 2, 2026.
• This was a tax-withholding forfeiture (transaction code F), not an open-market sale or purchase.

Key Details

• Transaction date: 2026-03-02; filing date: 2026-03-03 (no late filing indicated).
• Price used for value: $86.58 (closing price on 3/2/2026).
• Shares forfeited/withheld: 1,121; value: $97,056.
• Reason: Withholding to cover tax obligations on 2024 PRSUs that vested on February 28, 2026.
• Grant background: The 2024 PRSUs were granted in May 2024 and were earned at 150% by Compensation Committee resolution (2/13/2025); half of the earned shares vested 2/28/2025 and the remainder vested 2/28/2026.
• Post-vesting note: Of the shares held after the vesting of the remaining 2024 PRSUs, 16,525 were issuable on vesting of other restricted stock units and remain subject to forfeiture.

Context

• This is a routine tax-withholding event (shares surrendered to cover taxes) rather than an intentional market sale or purchase; such transactions are common when equity awards vest and do not necessarily signal insider sentiment.