ACMR ACM Research, Inc.: institutional ownership and insider trading
403 funds reported holding $6.90B of ACM Research, Inc. in their latest 13F filings; in Q2 2026 funds net bought $717M, with 119 new positions and 41 funds selling out; over the last 12 months insiders bought $0 and sold $51.2M on the open market.
Famous investors holding ACMR
- Mason Hawkins (Southeastern Asset Management): $17.7M, 0.9% of the portfolio
- George Soros (Soros Fund Management): $3.82M, 0.1% of the portfolio
- Renaissance Technologies (Renaissance Technologies): $29.2M, 0.0% of the portfolio
- Ken Griffin (Citadel Advisors): $136M, 0.0% of the portfolio
- Two Sigma (Two Sigma Investments): $28.7M, 0.0% of the portfolio
- Izzy Englander (Millennium Management): $21.7M, 0.0% of the portfolio
- Lee Ainslie (Maverick Capital): $674K, 0.0% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $4.25M, 0.0% of the portfolio
Largest institutional holders of ACMR
- BlackRock, Inc. (BLK) — $1.10B
- VANGUARD PORTFOLIO MANAGEMENT LLC — $425M
- VANGUARD CAPITAL MANAGEMENT LLC — $312M
- Capital World Investors — $304M
- STATE STREET CORP (STT, STT-PG) — $278M
- VANGUARD GROUP INC — $196M
- GEODE CAPITAL MANAGEMENT, LLC — $189M
- JANE STREET GROUP, LLC — $184M
- Tidal Investments LLC — $174M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP — $152M
Recent ACMR insider trades
- Sep 9, 2026: Wang David H sold 140,000 shares ($10.6M)
- Aug 20, 2026: McKechnie Mark sold 55,199 shares ($4.26M)
- Aug 18, 2026: Dun Haiping sold 5,000 shares ($406K)
- Jun 5, 2026: Cheav Sotheara sold 18,750 shares ($1.59M)
5%+ owners
- Vanguard Portfolio Management: 5.3% (Schedule 13G, filed Jul 31, 2026)