Kurtzweil John T. - 19 May 2026 Form 4 Insider Report for AXCELIS TECHNOLOGIES INC (ACLS)

Reporting relationship: Director
Issuer ticker: ACLS
Reported as of: 19 May 2026
Net transaction value: -$485,771
SEC form: 4
Accepted by SEC: 20 May 2026, 17:05:19 UTC
Prior SEC filing: 18 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Eileen J. Evans, Attorney-in-Fact

Key filing fact

Kurtzweil John T. filed Form 4 for AXCELIS TECHNOLOGIES INC (ACLS) on 20 May 2026.

Key facts

This page summarizes Kurtzweil John T.'s Form 4 filing for AXCELIS TECHNOLOGIES INC (ACLS).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 20 May 2026, 17:05.

Change

Previous filing in this sequence was filed on 18 May 2026.
Current net transaction value: -$485,771.

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 0001184588 Primary reporting owner

KURTZWEIL JOHN T

Relationship: Director
Address: C/O AXCELIS TECHNOLOGIES, INC., 108 CHERRY HILL DRIVE, BEVERLY
Signature: /s/ Eileen J. Evans, Attorney-in-Fact
Signature date: 20 May 2026

Reported non-derivative transactions

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

ACLS transaction

Common Stock

Sale

Transaction value: $485,771
Shares: -3,500
Change %: -9.6%
Price: $138.79
Shares after: 32,990
Date: 19 May 2026
Ownership: Direct
Footnotes: F1, F2

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $138.7600 to $139.1300, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Footnote F2

Of the shares held after this sale on May 19, 2026, 1,440 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.