AXCELIS TECHNOLOGIES INC (ACLS) Institutional Ownership and Insiders Activity

AXCELIS TECHNOLOGIES INC (ACLS) is widely held by institutional investors, with 421 firms reporting positions valued at approximately $5.81B based on SEC Form 13F filings for the quarter ended June 30, 2026.

Blackrock, Inc. is the largest disclosed holder, reporting approximately $952.83M in ACLS holdings in its latest filing.

Recent insider activity includes 4 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.