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AXCELIS TECHNOLOGIES INC

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Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

AXCELIS TECHNOLOGIES INC

CIK 0001113232ACLS· quarter ending 2026-06-30
Shares outstanding
30,881,489
as of 2026-08-03 · 10-Q cover page, filed 2026-08-06
Held by 13F filers
26
selection includes debt or preferreds — no % of shares outstanding
Holders
2
+1 vs 2026-03-31 · 1 new, 0 exited
Value
$4K
shares +2500.0% vs prior quarter
13F holdings exceed the share count. This is normal for heavily shorted stocks: shares lent to short sellers are reported by the lender and again by whoever bought them. Related filers occasionally report the same position twice as well.

Share classes (cover page of the 10-Q filed 2026-08-06, as of 2026-08-03)

ClassListedShares outstandingHeld by 13F filers% of classHoldersCUSIP
Common stockACLS · NASDAQ30,881,48931,024,032100.5%442054540208

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine
CountCUSIPClass (as filers write it)HoldersShares heldClass shares% of classValueOptionsMapped via
054540208Stock44231,024,03230,881,489100.5%$5.9B10 call / 9 put13DGholders →
054540109COMnot common226——$4K—prefixholders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (2 of 2 · 054540109)

change vs 2026-03-31
#FilerShares / principal% of classValueChange
1MANNING & NAPIER ADVISORS LLC25—$4KNEW
2HUNTINGTON NATIONAL BANK1—$3—

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting personFormFiledEventShares% of class
Abigail P. JohnsonSCHEDULE 13G/A2026-08-062026-06-304,122,402.0813.4%
FMR LLCSCHEDULE 13G/A2026-08-062026-06-304,122,402.0813.4%
REINHART PARTNERS, LLC.SCHEDULE 13G/A2026-07-142026-06-30928,6603%
Vanguard Capital ManagementSCHEDULE 13G2026-04-292026-03-311,617,3215.26%
Vanguard Portfolio ManagementSCHEDULE 13G2026-04-282026-03-312,501,3598.14%
The Vanguard GroupSCHEDULE 13G/A2026-03-262026-03-1300%
American Century Companies, Inc.SCHEDULE 13G/A2025-11-142025-09-301,345,7614.3%
American Century Investment Management, Inc.SCHEDULE 13G/A2025-11-142025-09-301,345,7614.3%
Stowers Institute for Medical ResearchSCHEDULE 13G/A2025-11-142025-09-301,345,7614.3%
BlackRock, Inc.SCHEDULE 13G/A2025-04-292025-03-314,911,04215.3%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.