SEC Form 4 · accession 0001979418-26-000010
AXCELIS TECHNOLOGIES INC · ACLS
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Gerald M Blumenstock
Officer — EVP, Research, Dev. & Eng.
Period of report
Jun 15, 2026
Accepted (ET)
Jun 16, 2026 · 5:05 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001113232
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF2,F1,F3 | Jun 15, 2026 | F | 506 | $191.60 | D | 19,987 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1This forfeiture of shares for tax withholding purposes relates to the vesting on June 15, 2026 of service vesting restricted stock units granted to the executive in June 2023. The shares issued to the executive following 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.
- F2Represents the closing price of the common stock on the date of the tax withholding.
- F3Of the shares held after this vesting event on June 15, 2026, 19,447 shares are issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.