Tatnall Christopher 4
4 · AXCELIS TECHNOLOGIES INC · Filed Apr 21, 2026
Research Summary
AI-generated summary of this filing
Axcelis (ACLS) EVP Christopher Tatnall Forfeits 907 Shares for Taxes
What Happened
Christopher Tatnall, EVP Global Customer Operations at Axcelis Technologies (ACLS), had 907 shares withheld/forfeited on April 20, 2026 to satisfy tax withholding on restricted stock units that vested April 18, 2026. The withheld shares were valued at $131.02 each, totaling $118,835. This was a tax-withholding transaction (code F), not an open-market sale.
Key Details
- Transaction date: 2026-04-20; Price used for withholding: $131.02 (closing price on the withholding date).
- Shares forfeited/withheld for taxes: 907 — proceeds/value: $118,835.
- Reason: Tax withholding related to vesting of service-based RSUs granted in April 2022 (vested April 18, 2026). (Footnote F1)
- Shares/RSUs after vesting: of the shares held after the April 18 vesting, 16,463 were issuable on vesting of RSUs under the 2012 plan and remain subject to forfeiture; this includes RSUs earned at 112.5% for 2025 performance (Footnote F3).
- Filing: Report filed April 21, 2026 for a transaction on April 20, 2026 (no late filing indicated).
Context
- This was a routine tax-withholding (cashless/stock-surrender) to satisfy payroll/tax obligations on vested RSUs, not an indication of an open-market sale or directional view.
- Footnote F3 notes some of the remaining RSUs are performance-based (including an above-target payout component for 2025).
Insider Transaction Report
Form 4
Tatnall Christopher
EVP Global Customer Operations
Transactions
- Tax Payment
Common Stock
[F1][F2][F3]2026-04-20$131.02/sh−907$118,835→ 23,044 total
Footnotes (3)
- [F1]This forfeiture of shares for tax withholding purposes relates to the vesting on April 18, 2026 of service vesting restricted stock units granted to the executive in April 2022. The shares issued to the executive on the vesting were reduced by a number of shares having a value equal to the executive's tax withholding obligation with respect to the vested restricted stock units.
- [F2]Represents the closing price of the Company's common stock on the date of the tax withholding.
- [F3]Of the shares held after this vesting on April 18, 2026, 16,463 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture. This amount includes restricted stock units earned by the reporting person upon the achievement of 112.5% of the restricted stock units granted in 2025 based upon the achievement of 2025 performance goals.
Signature
/s/ Eileen J. Evans, Attorney-in-Fact|2026-04-21