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 September 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 |
|---|---|---|
| DIMENSIONAL FUND ADVISORS LP | 1.1M | 20.3% |
| Polunin Capital Partners Ltd | 731.4K | 14.1% |
| PRINCIPAL FINANCIAL GROUP INC | 380.3K | 7.3% |
| Bank of New York Mellon Corp | 328.8K | 6.3% |
| Raiffeisen Bank International AG | 291.1K | 5.6% |
| CONGRESS ASSET MANAGEMENT CO | 277.2K | 5.3% |
| MACKENZIE FINANCIAL CORP | 247.7K | 4.8% |
| CITIGROUP INC | 245.8K | 4.7% |
| Penn Capital Management Company, LLC | 227.9K | 4.4% |
| MATTHEWS INTERNATIONAL CAPITAL MANAGEMENT LLC | 132.4K | 2.5% |
| THOMPSON SIEGEL & WALMSLEY LLC | 105.4K | 2.0% |
| Inspire Investing, LLC | 68.2K | 1.3% |
| Kendall Capital Management | 65.5K | 1.3% |
| BARCLAYS PLC | 65.4K | 1.3% |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | 49.5K | 1.0% |
| HUSSMAN STRATEGIC ADVISORS, INC. | 42.0K | 0.8% |
| SIMPLEX TRADING, LLC | 37.5K | 0.7% |
| Thrivent Financial for Lutherans | 37.4K | 0.7% |
| JAMES INVESTMENT RESEARCH, INC. | 32.4K | 0.6% |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 31.4K | 0.6% |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM | 29.1K | 0.6% |
| Illinois Municipal Retirement Fund | 28.9K | 0.6% |
| WASATCH ADVISORS LP | 28.9K | 0.6% |
| NorthCrest Asset Manangement, LLC | 25.4K | 0.5% |
| Louisiana State Employees Retirement System | 25.1K | 0.5% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| DIMENSIONAL FUND ADVISORS LP | Increased | 954.5K | 1.1M | +100.6K |
| Raiffeisen Bank International AG | Reduced | 360.0K | 291.1K | -68.9K |
| Penn Capital Management Company, LLC | Reduced | 285.8K | 227.9K | -57.9K |
| CONGRESS ASSET MANAGEMENT CO | Increased | 223.9K | 277.2K | +53.3K |
| HUSSMAN STRATEGIC ADVISORS, INC. | New | 0 | 42.0K | +42.0K |
| CITIGROUP INC | Increased | 209.8K | 245.8K | +35.9K |
| WASATCH ADVISORS LP | New | 0 | 28.9K | +28.9K |
| BARCLAYS PLC | Increased | 40.3K | 65.4K | +25.1K |
| CenterBook Partners LP | Reduced | 41.4K | 18.4K | -23.0K |
| Empirical Financial Services, LLC d.b.a. Empirical Wealth Management | Reduced | 33.2K | 11.9K | -21.3K |
| MACKENZIE FINANCIAL CORP | Reduced | 268.0K | 247.7K | -20.3K |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | Increased | 13.5K | 31.4K | +17.9K |
| Polunin Capital Partners Ltd | Reduced | 748.5K | 731.4K | -17.1K |
| IMC-Chicago, LLC | New | 0 | 12.0K | +12.0K |
| Savant Capital, LLC | Increased | 2.5K | 14.2K | +11.7K |
| Candriam S.C.A. | New | 0 | 10.0K | +10.0K |
| Capelight Capital Asset Management LP | New | 0 | 10.0K | +10.0K |
| PRINCIPAL FINANCIAL GROUP INC | Increased | 370.9K | 380.3K | +9.4K |
| Kendall Capital Management | Reduced | 72.8K | 65.5K | -7.3K |
| Fideuram Asset Management (Ireland) dac | New | 0 | 7.0K | +7.0K |
| FNY Investment Advisers, LLC | Sold Out | 7.0K | 0 | -7.0K |
| DYMON ASIA CAPITAL (SINGAPORE) PTE. LTD. | New | 0 | 7.0K | +7.0K |
| SIMPLEX TRADING, LLC | Reduced | 44.3K | 37.5K | -6.8K |
| Creative Planning | Increased | 17.9K | 24.7K | +6.8K |
| AMI ASSET MANAGEMENT CORP | New | 0 | 6.4K | +6.4K |
| State of Alaska, Department of Revenue | Reduced | 20.6K | 14.6K | -6.0K |
| Prescott Group Capital Management, L.L.C. | New | 0 | 6.0K | +6.0K |
| VICTORY FINANCIAL GROUP, LLC | Sold Out | 5.3K | 0 | -5.3K |
| Inspire Investing, LLC | Increased | 63.0K | 68.2K | +5.2K |
| INTEGRITY ALLIANCE, LLC. | New | 0 | 5.2K | +5.2K |
| Pekin Hardy Strauss, Inc. | New | 0 | 5.0K | +5.0K |
| Cambridge Investment Research Advisors, Inc. | Reduced | 9.8K | 5.0K | -4.8K |
| Maryland State Retirement & Pension System | Increased | 8.3K | 13.1K | +4.8K |
| KESTRA PRIVATE WEALTH SERVICES, LLC | New | 0 | 4.8K | +4.8K |
| QP WEALTH MANAGEMENT, LLC | Sold Out | 4.5K | 0 | -4.5K |
| Cypress Capital Group | Reduced | 28.4K | 24.2K | -4.2K |
| Perigon Wealth Management, LLC | Sold Out | 3.7K | 0 | -3.7K |
| State of Wyoming | Sold Out | 3.4K | 0 | -3.4K |
| CoreCap Advisors, LLC | Reduced | 5.4K | 2.1K | -3.3K |
| DAYMARK WEALTH PARTNERS, LLC | Sold Out | 3.2K | 0 | -3.2K |
| Capstone Capital Management Ltd | Increased | 16.6K | 19.6K | +2.9K |
| Caitong International Asset Management Co., Ltd | Reduced | 6.1K | 3.3K | -2.8K |
| JAMES INVESTMENT RESEARCH, INC. | Increased | 29.7K | 32.4K | +2.8K |
| Allspring Global Investments Holdings, LLC | Increased | 15.4K | 17.9K | +2.6K |
| Bank of New York Mellon Corp | Increased | 326.3K | 328.8K | +2.6K |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | Reduced | 51.9K | 49.5K | -2.4K |
| VIRGINIA RETIREMENT SYSTEMS ET Al | Increased | 4.9K | 7.3K | +2.4K |
| KINGSWOOD WEALTH ADVISORS, LLC | Sold Out | 2.3K | 0 | -2.3K |
| Vise Technologies, Inc. | Sold Out | 2.2K | 0 | -2.2K |
| Visionary Wealth Advisors | Sold Out | 2.0K | 0 | -2.0K |
| STRS OHIO | Reduced | 16.4K | 14.4K | -2.0K |
| Key Client Fiduciary Advisors, LLC | Sold Out | 2.0K | 0 | -2.0K |
| Colonial River Investments, LLC | Sold Out | 1.9K | 0 | -1.9K |
| DekaBank Deutsche Girozentrale | New | 0 | 1.9K | +1.9K |
| CIBC Asset Management Inc | Sold Out | 1.9K | 0 | -1.9K |
| NorthCrest Asset Manangement, LLC | Reduced | 27.2K | 25.4K | -1.8K |
| AlphaCore Capital LLC | Sold Out | 1.7K | 0 | -1.7K |
| Sterling Capital Management LLC | Increased | 189 | 1.9K | +1.7K |
| Spire Wealth Management | Reduced | 14.7K | 13.0K | -1.6K |
| OPPENHEIMER ASSET MANAGEMENT INC. | Sold Out | 1.6K | 0 | -1.6K |
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.