ACM Research, Inc. (ACMR) Institutional Ownership

Ownership Summary

ACM Research, Inc. (NASDAQ:ACMR) currently has 15 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

• These investors collectively held 0.9% of the company's total shares outstanding in December 2025, down from 62.0% in September 2025.
• The company experienced a 50.46% quarterly change in institutional shares held, alongside a decrease of 91.57% in total owners annually.
• Of these 15 institutional investors, 10 increased their holdings in ACM Research, while 2 of them reduced positions, and 3 investors maintained their exposure.
• This class of investors increased its holdings in ACM Research to 624.29K shares for the 13F-cycle ending December 2025, up by 209.38K shares quarter on quarter, and down 35.06Mn shares year over year.
• With 289.45K shares, CONGRESS ASSET MANAGEMENT CO commands the largest institutional position in ACM Research as of December 31, 2025, equating to 0.42% of the company.
• Among the most significant buyers of ACM Research during December 2025 were SG Americas Securities, LLC (206.84K), CONGRESS ASSET MANAGEMENT CO (7.53K), CONTRAVISORY INVESTMENT MANAGEMENT, INC. (5.10K), GAMMA Investing LLC (299), NISA INVESTMENT ADVISORS, LLC (40).
• Leading sellers of ACM Research stock in December 2025 included Allspring Global Investments Holdings, LLC (6.93K), CoreCap Advisors, LLC (3.58K).
• The top 10 institutional holders of ACM Research for the quarter ending December 2025 included CONGRESS ASSET MANAGEMENT CO (289.45K), SG Americas Securities, LLC (229.48K), NorthCrest Asset Manangement, LLC (33.58K), Allspring Global Investments Holdings, LLC (24.39K), Spire Wealth Management (16.60K), CoreCap Advisors, LLC (12.63K), Pallas Capital Advisors LLC (9.60K), CONTRAVISORY INVESTMENT MANAGEMENT, INC. (5.10K), NISA INVESTMENT ADVISORS, LLC (1.95K), GAMMA Investing LLC (1.07K).