Todd Sutton - 15 May 2026 Form 4 Insider Report for AXCELIS TECHNOLOGIES INC (ACLS)

Reporting relationship: VP Corporate Controller
Issuer ticker: ACLS
Reported as of: 15 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 19 May 2026, 17:05:18 UTC
Prior SEC filing: 15 May 2026
Next SEC filing: 20 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Eileen J. Evans, Attorney-in-Fact

Key filing fact

Todd Sutton filed Form 4 for AXCELIS TECHNOLOGIES INC (ACLS) on 19 May 2026.

Key facts

This page summarizes Todd Sutton's Form 4 filing for AXCELIS TECHNOLOGIES INC (ACLS).
4 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 19 May 2026, 17:05.

Change

Previous filing in this sequence was filed on 15 May 2026.
Current net transaction value: $0.

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 0002124265 Primary reporting owner

Sutton Todd

Relationship: VP Corporate Controller
Address: 108 CHERRY HILL DRIVE, BEVERLY
Signature: /s/ Eileen J. Evans, Attorney-in-Fact
Signature date: 19 May 2026

Reported non-derivative transactions

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

ACLS transaction

Common Stock

Award

Transaction value
Shares: +1,168
Change %: +15%
Price: $0.000000^*
Shares after: 8,985
Date: 15 May 2026
Ownership: Direct
Footnotes: F1, F2

ACLS transaction

Common Stock

Tax liability

Transaction value
Shares: -226
Change %: -2.5%
Price: $155.18^*
Shares after: 8,759
Date: 15 May 2026
Ownership: Direct
Footnotes: F3, F4, F5

ACLS transaction

Common Stock

Tax liability

Transaction value
Shares: -112
Change %: -1.3%
Price: $155.18^*
Shares after: 8,647
Date: 15 May 2026
Ownership: Direct
Footnotes: F4, F6, F7

ACLS transaction

Common Stock

Tax liability

Transaction value
Shares: -103
Change %: -1.2%
Price: $155.18^*
Shares after: 8,544
Date: 15 May 2026
Ownership: Direct
Footnotes: F4, F8, F9

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 9 footnotes

Footnote F1

These shares are issuable on vesting of restricted stock units granted under the Company's 2012 Equity Incentive Plan on May 15, 2026. Assuming continuation of employment, these restricted stock units will vest as to one-third of the shares granted on each of May 15, 2027, May 15, 2028, and May 15, 2029.

Footnote F2

Of the shares held following this grant on May 15, 2026, 6,706 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.

Footnote F3

This forfeiture of shares for tax withholding purposes relates to the vesting on May 15, 2026 of service vesting restricted stock units granted to the reporting person in May 2025. The shares issued to the reporting person on the vesting were reduced by a number of shares having a value equal to the reporting person's tax withholding obligation with respect to the vested restricted stock units.

Footnote F4

Represents the closing price of the common stock on the date of the tax withholding.

Footnote F5

Of the shares held after this vesting event on May 15, 2026, 5,937 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.

Footnote F6

This forfeiture of shares for tax withholding purposes relates to the vesting on May 15, 2026 of service vesting restricted stock units granted to the reporting person in May 2024. The shares issued to the reporting person on the vesting were reduced by a number of shares having a value equal to the reporting person's tax withholding obligation with respect to the vested restricted stock units.

Footnote F7

Of the shares held after this vesting event on May 15, 2026, 5,557 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.

Footnote F8

This forfeiture of shares for tax withholding purposes relates to the vesting on May 15, 2026 of service vesting restricted stock units granted to the reporting person in May 2023. The shares issued to the reporting person on the vesting were reduced by a number of shares having a value equal to the reporting person's tax withholding obligation with respect to the vested restricted stock units.

Footnote F9

Of the shares held after this vesting event on May 15, 2026, 5,207 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.