Axcelis Technologies, Inc. (ACLS) Institutional Ownership & Insider Trading

436 institutions reported holding Axcelis Technologies, Inc. shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 23 insider trades on Form 4 since 2025-10-01.

Source: SEC EDGAR filings · figures as of 2026-06-30 · read by EquiReason

ACLSAxcelis Technologies, Inc.Follow ACLS — free

Semiconductor Equipment & Materials · Technology

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Market cap: 3.3B
P/E TTM: 35.8
Dividend yield: —
52-week: —
Next earnings: 5 Nov, in 12 days

Institutions · all 13F filers

quarter to 30 Jun 2026 · filers in both quarters

436 institutions held —% of the shares. Across filers that reported both quarters, shares held changed -4.8%.

Largest moves, shares (millions)

Institutional flow by quarter

net shares added or trimmed, millions · filers in both quarters

Quarter	Holders	Shares held, M	Change	Increased	New	Decreased	Closed
Jun 26	436	31	-4.8%	105	95	133	36
Mar 26	373	33	+4.6%	86	51	123	52
Dec 25	364	31	+2.2%	106	46	110	41
Sep 25	352	31	-3.5%	95	58	115	27
Jun 25	326	32	+1.6%	100	55	98	33
Mar 25	301	31	+1.8%	112	39	84	59
Dec 24	320	31	+1.3%	112	39	83	89
Sep 24	361	30	-2.5%	118	39	113	69

Axcelis Technologies, Inc. — questions

Who owns Axcelis Technologies, Inc. stock?: 436 institutions reported Axcelis Technologies, Inc. shares in 13F filings for the quarter ended 2026-06-30. The largest: BlackRock, Inc. (16.3%), FMR LLC (13.4%), VANGUARD PORTFOLIO MANAGEMENT LLC (8.0%).
Are Axcelis Technologies, Inc. insiders buying or selling?: 23 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.

Every figure on this page comes from Axcelis Technologies, Inc.'s own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.

How these figures are read: methodology · EquiReason.

Important information. Figures on this page are taken from filings submitted to the U.S. Securities and Exchange Commission (SEC) and processed automatically by EquiReason. They may contain errors, omissions or delays, and EquiReason makes no representation or warranty as to their accuracy, completeness or timeliness. Always verify figures against the original filing on SEC EDGAR before relying on them.

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