ACM RESEARCH INC-CLASS A (ACMR) Institutional Ownership and Insiders Activity

ACM RESEARCH INC-CLASS A (ACMR) is widely held by institutional investors, with 3 tracked firms reporting positions valued at approximately $40.35M based on SEC Form 13F filings for the quarter ended March 31, 2026.

Longleaf Partners is the largest disclosed holder, reporting approximately $30.81M in ACMR holdings in its latest filing.

Institutional ownership among tracked investors remains highly concentrated, with Longleaf Partners representing the majority of disclosed value.