Changes in Beneficial Ownership · 4
Axcelis Technologies, Inc.
ACLSNASDAQEQUITYCurrent
Changes in Beneficial Ownership
Structured filing — 4
form4-06162026_050601.xml
Filing details
- Report period
- 2026-06-15
- Issuer
- AXCELIS TECHNOLOGIES INC
- Issuer CIK
- 0001113232
- Trading symbol
- ACLS
Reporting owner 1
- Name
- Blumenstock Gerald M
- Reporting owner CIK
- 0001979418
- Relationship
- Officer
- Officer title
- EVP, Research, Dev. & Eng.
- Address
- C/O AXCELIS TECHNOLOGIES, INC., 108 CHERRY HILL DRIVE, BEVERLY, MA, 01915
Non-derivative transactions
| Security | Transaction date | Code | Amount | A / D | Price (USD) | Owned after | Ownership |
|---|---|---|---|---|---|---|---|
| Common Stock | 2026-06-15 | F · Form 4 | 506 | D[F1] | 191.60[F2] | 19,987[F3] | D |
Table key
- F · Form 4
- Securities delivered or withheld for exercise price or tax liability under Rule 16b-3
- D
- Direct
Footnotes
- F1
- This 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.↩ 1
- F2
- Represents the closing price of the common stock on the date of the tax withholding.↩ 1
- F3
- Of 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.↩ 1
Signature 1
- Signed
- /s/ Eileen J. Evans, Attorney-in-Fact
- Date
- 2026-06-16
Company context
Axcelis (Nasdaq: ACLS), headquartered in Beverly, Mass., has been providing innovative, high-productivity solutions for the semiconductor industry for over 45 years. Axcelis is dedicated to developing enabling process applications through the design, manufacture and complete life cycle support of ion implantation systems, one of the most critical and enabling steps in the IC manufacturing process. Learn more about Axcelis at www.axcelis.com.