ACMR ACM Research, Inc.
ACM Research, Inc. (ACMR) Institutional Ownership
What the institutions did with ACMR last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 8.7M | 17.8% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3.3M | 6.9% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.5M | 5.1% |
| Capital World Investors | 2.4M | 4.9% |
| STATE STREET CORP | 2.2M | 4.5% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.5M | 3.1% |
| Invesco Ltd. | 1.2M | 2.4% |
| Value Aligned Research Advisors, LLC | 1.1M | 2.2% |
| WFM ASIA (BVI) Ltd | 969.2K | 2.0% |
| DIMENSIONAL FUND ADVISORS LP | 954.5K | 2.0% |
| WCM INVESTMENT MANAGEMENT, LLC | 917.7K | 1.9% |
| Polunin Capital Partners Ltd | 748.5K | 1.5% |
| Tekne Capital Management, LLC | 737.5K | 1.5% |
| MORGAN STANLEY | 700.2K | 1.4% |
| FMR LLC | 672.2K | 1.4% |
| FULLER & THALER ASSET MANAGEMENT, INC. | 639.4K | 1.3% |
| GILDER GAGNON HOWE & CO LLC | 637.1K | 1.3% |
| CITADEL ADVISORS LLC | 636.8K | 1.3% |
| Capital International Investors | 623.4K | 1.3% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 591.6K | 1.2% |
| NORTHERN TRUST CORP | 569.1K | 1.2% |
| Jupiter Topco LLC | 553.8K | 1.1% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 526.8K | 1.1% |
| BANK OF AMERICA CORP /DE/ | 479.7K | 1.0% |
| Tidal Investments LLC | 470.9K | 1.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Capital World Investors | New | 0 | 2.4M | +2.4M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 2.2M | 3.3M | +1.1M |
| WFM ASIA (BVI) Ltd | New | 0 | 969.2K | +969.2K |
| WCM INVESTMENT MANAGEMENT, LLC | Reduced | 1.9M | 917.7K | -943.2K |
| Longaeva Partners L.P. | Reduced | 708.4K | 17.7K | -690.6K |
| BlackRock, Inc. | Increased | 8.0M | 8.7M | +676.0K |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | Reduced | 782.9K | 139.5K | -643.4K |
| FULLER & THALER ASSET MANAGEMENT, INC. | New | 0 | 639.4K | +639.4K |
| Capital International Investors | New | 0 | 623.4K | +623.4K |
| Oxbow Capital Management (HK) Ltd | Sold Out | 596.7K | 0 | -596.7K |
| GILDER GAGNON HOWE & CO LLC | Increased | 71.2K | 637.1K | +565.8K |
| LSV ASSET MANAGEMENT | Reduced | 545.3K | 12.1K | -533.2K |
| MORGAN STANLEY | Reduced | 1.2M | 700.2K | -492.5K |
| Qube Research & Technologies Ltd | Reduced | 724.4K | 280.0K | -444.4K |
| CITADEL ADVISORS LLC | Increased | 203.4K | 636.8K | +433.5K |
| CITIGROUP INC | Reduced | 619.9K | 209.8K | -410.0K |
| Invesco Ltd. | Increased | 787.1K | 1.2M | +383.0K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 217.0K | 591.6K | +374.6K |
| Cederberg Capital Ltd | Reduced | 599.2K | 254.7K | -344.5K |
| MY.Alpha Management HK Advisors Ltd | New | 0 | 249.5K | +249.5K |
| WEXFORD CAPITAL LP | Reduced | 599.2K | 355.4K | -243.8K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 719.0K | 954.5K | +235.5K |
| 12 West Capital Management LP | Increased | 6.1K | 225.0K | +218.9K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 2.3M | 2.5M | +198.4K |
| MACKENZIE FINANCIAL CORP | Increased | 70.9K | 268.0K | +197.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 59.7K | 253.7K | +193.9K |
| STATE STREET CORP | Increased | 2.0M | 2.2M | +182.1K |
| WELLINGTON MANAGEMENT GROUP LLP | New | 0 | 175.0K | +175.0K |
| Kerrisdale Advisers, LLC | Reduced | 223.8K | 62.6K | -161.2K |
| TWO SIGMA INVESTMENTS, LP | Increased | 52.4K | 212.5K | +160.1K |
| Tidal Investments LLC | Increased | 313.8K | 470.9K | +157.1K |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | Increased | 16.8K | 169.3K | +152.5K |
| WELLS FARGO & COMPANY/MN | Reduced | 204.1K | 58.6K | -145.4K |
| GOLDMAN SACHS GROUP INC | Reduced | 552.3K | 426.2K | -126.1K |
| BRIGHT VALLEY CAPITAL Ltd | New | 0 | 118.0K | +118.0K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.4M | 1.5M | +116.6K |
| CONGRESS ASSET MANAGEMENT CO | Reduced | 339.9K | 223.9K | -116.0K |
| Mitsubishi UFJ Trust & Banking Corp | Reduced | 465.8K | 351.2K | -114.6K |
| Penn Capital Management Company, LLC | Reduced | 397.8K | 285.8K | -112.0K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 122.6K | 229.8K | +107.2K |
| RPg Family Wealth Advisory, LLC | Increased | 91.0K | 196.3K | +105.3K |
| STOREBRAND ASSET MANAGEMENT AS | Reduced | 180.0K | 80.5K | -99.5K |
| Value Aligned Research Advisors, LLC | Increased | 955.9K | 1.1M | +98.0K |
| AMERIPRISE FINANCIAL INC | Reduced | 212.2K | 115.2K | -97.1K |
| Nearwater Capital Markets, Ltd | Sold Out | 94.2K | 0 | -94.2K |
| Portolan Capital Management, LLC | Increased | 83.3K | 177.4K | +94.2K |
| HRT FINANCIAL LP | Reduced | 129.3K | 35.2K | -94.1K |
| SEGALL BRYANT & HAMILL, LLC | Sold Out | 88.0K | 0 | -88.0K |
| JPMORGAN CHASE & CO | Reduced | 297.6K | 214.9K | -82.7K |
| BANK OF AMERICA CORP /DE/ | Increased | 402.4K | 479.7K | +77.3K |
| Y-Intercept (Hong Kong) Ltd | Sold Out | 76.2K | 0 | -76.2K |
| KENNEDY CAPITAL MANAGEMENT LLC | Reduced | 103.5K | 28.5K | -74.9K |
| MILLENNIUM MANAGEMENT LLC | Increased | 65.6K | 140.5K | +74.9K |
| FIRST TRUST ADVISORS LP | Reduced | 374.0K | 306.0K | -68.0K |
| NEW YORK STATE COMMON RETIREMENT FUND | Reduced | 259.4K | 191.5K | -67.9K |
| GROUP ONE TRADING LLC | Increased | 91.4K | 157.1K | +65.6K |
| Atika Capital Management LLC | New | 0 | 63.0K | +63.0K |
| HUSSMAN STRATEGIC ADVISORS, INC. | Sold Out | 63.0K | 0 | -63.0K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 341.4K | 404.1K | +62.7K |
| Russell Investments Group, Ltd. | Increased | 160.9K | 221.8K | +60.8K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.