ACM Research, Inc. (ACMR) Institutional Ownership

Ownership Summary

ACM Research, Inc. (NASDAQ:ACMR) has 266 institutional investors that have filed 13F reports for the period ending December 2025.

• Their combined ownership stood at 66.9% of outstanding shares in December 2025, up from 61.7% in September 2025.
• Their total shares held in ACMR increased 12.01% from the prior quarter, while the number of investors in ACM Research increased 48.6% year over year.
• Activity in ACMR broke down as 154 buyers, 86 sellers, and 26 unchanged among 266 total holders.
• Combined, these investors held 45.74Mn shares in ACMR for December 2025, up by 4.9Mn shares quarter on quarter, and up 8.73Mn shares year over year.
• As of December 31, 2025, the biggest holder of ACM Research is BlackRock, Inc. at 7.98Mn shares, representing 11.67% of shares outstanding.
• The largest buyers of ACM Research for the quarter ending December 2025 were VANGUARD CAPITAL MANAGEMENT LLC (2.26Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (2.2Mn), WCM INVESTMENT MANAGEMENT, LLC (1.85Mn), Janus Henderson Group Plc (1.09Mn), Value Aligned Research Advisors, LLC (955.93K).
• The largest sales of ACMR for the quarter ending December 2025 came from LSV ASSET MANAGEMENT (1.84Mn), SOUTHEASTERN ASSET MANAGEMENT INC/TN/ (897.28K), Cederberg Capital Ltd (591.2K), Invesco Ltd. (555.04K), Mitsubishi UFJ Trust & Banking Corp (363.37K).
• ACM Research's 10 largest shareholders as of December 2025 include BlackRock, Inc. (7.98Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.26Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (2.2Mn), Janus Henderson Group Plc (2.17Mn), State Street Corp (2.01Mn), WCM INVESTMENT MANAGEMENT, LLC (1.86Mn), GEODE CAPITAL MANAGEMENT, LLC (1.37Mn), Morgan Stanley (1.19Mn), Value Aligned Research Advisors, LLC (955.93K), Invesco Ltd. (787.1K) per Business Quant data.