Robert John Mahoney - 02 Jun 2026 Form 4 Insider Report for AXCELIS TECHNOLOGIES INC (ACLS)

Reporting relationship: EVP Global Operations
Issuer ticker: ACLS
Reported as of: 02 Jun 2026
Net transaction value: -$179,302
SEC form: 4
Accepted by SEC: 03 Jun 2026, 17:05:05 UTC
Prior SEC filing: 20 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Eileen J. Evans, Attorney-in-Fact

Key filing fact

Robert John Mahoney filed Form 4 for AXCELIS TECHNOLOGIES INC (ACLS) on 03 Jun 2026.

Key facts

This page summarizes Robert John Mahoney's Form 4 filing for AXCELIS TECHNOLOGIES INC (ACLS).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 03 Jun 2026, 17:05.

Change

Previous filing in this sequence was filed on 20 May 2026.
Current net transaction value: -$179,302.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002101601 Primary reporting owner

Mahoney Robert John

Relationship: EVP Global Operations
Address: 108 CHERRY HILL DRIVE, BEVERLY
Signature: /s/ Eileen J. Evans, Attorney-in-Fact
Signature date: 03 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ACLS transaction

Common Stock

Sale

Transaction value: $179,302
Shares: -1,155
Change %: -7.4%
Price: $155.24
Shares after: 14,410
Date: 02 Jun 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Of the shares held after this sale on June 2, 2026, 12,578 shares were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.