Acm Research Inc. Class AACMR
13F holders, Q1 2026 (March 31)301holders +22
65new positions
43sold out
5famous investors
$39.28avg. 13F price*
At the end of Q1 2026, 301 institutions reported holding Acm Research Inc. Class A (ACMR) in their 13F filings, up 22 from Q4 2025. 65 opened new positions and 43 sold out. The largest holders were BlackRock, Inc. ($314.2M), Vanguard Capital Management LLC ($89.1M) and Vanguard Portfolio Management LLC ($86.7M). 5 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Cliff Asness (0.0% of AQR Capital Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Acm Research Inc. Class A
- CUSIP
- 00108J109
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 65 | $179.7M |
| Exits | 43 | $158.3M |
All 13F filers, Q4 2025 → Q1 2026: 9,987,731 shares bought and 10,655,204 shares sold, net −667,473 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 301 holders
| BlackRock, Inc. | 0.01% | Add +1.2% | 7,984,847 | $314.2M |
| Vanguard Capital Management LLC | 0.00% | — | 2,264,337 | $89.1M |
| Vanguard Portfolio Management LLC | 0.00% | — | 2,203,831 | $86.7M |
| State Street Corp. | 0.00% | Add +2.5% | 2,006,116 | $78.9M |
| WCM Investment Management, LLC | 0.16% | Add +16878.8% | 1,860,874 | $70.6M |
| Geode Capital Management, LLC | 0.00% | Add +2.1% | 1,371,227 | $54.0M |
| Morgan Stanley | 0.00% | Reduce -14.3% | 1,192,705 | $46.9M |
| Janus Henderson Group PLC | 0.02% | Add +0.2% | 1,085,634 | $42.7M |
| Value Aligned Research Advisors, LLC | 0.45% | New | 955,927 | $37.6M |
| Polunin Capital Partners Ltd | 8.25% | New | 763,318 | $31.8M |
| Invesco Ltd. | 0.00% | Reduce -41.4% | 787,101 | $31.0M |
| Southeastern Asset Management Inc. | 1.52% | Reduce -53.4% | 782,900 | $30.8M |
| Qube Research & Technologies Ltd | 0.04% | Add +396.0% | 724,405 | $28.5M |
| Dimensional Fund Advisors LP | 0.01% | Add +207.6% | 719,023 | $28.3M |
| Tekne Capital Management, LLC | 11.89% | No change | 715,000 | $28.1M |
| Longaeva Partners L.P. | 1.34% | New | 708,379 | $27.9M |
| FMR LLC | 0.00% | Reduce -21.7% | 629,244 | $24.8M |
| Citigroup Inc. | 0.02% | Add +1316.8% | 619,892 | $24.4M |
| Wexford Capital LP | 3.89% | Add +78.9% | 599,246 | $23.6M |
| Cederberg Capital Ltd | 12.65% | Reduce -13.7% | 599,200 | $23.6M |
| Oxbow Capital Management (HK) Ltd | 6.33% | New | 596,689 | $23.5M |
| Northern Trust Corp. | 0.00% | Add +3.4% | 562,535 | $22.1M |
| Goldman Sachs Group Inc. | 0.00% | Add +52.7% | 552,304 | $21.7M |
| LSV Asset Management | 0.05% | Reduce -77.1% | 545,307 | $21.5M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +0.6% | 481,219 | $18.9M |
| Mitsubishi UFJ Trust & Banking Corp | 0.05% | Reduce -43.8% | 465,759 | $18.3M |
| UBS Group AG | 0.00% | Reduce -20.8% | 404,109 | $15.9M |
| Bank of America Corp. | 0.00% | Add +33.4% | 402,412 | $15.8M |
| Penn Capital Management Company, LLC | 1.22% | Reduce -8.7% | 397,766 | $15.7M |
| First Trust Advisors LP | 0.01% | Add +73.7% | 373,987 | $14.7M |
| Raiffeisen Bank International AG | 0.21% | Reduce -12.6% | 380,000 | $14.4M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 341,401 | $13.4M |
| Principal Financial Group Inc. | 0.01% | Reduce -11.1% | 340,724 | $13.4M |
| Congress Asset Management Co. | 0.10% | Add +17.4% | 339,863 | $13.4M |
| AQR Capital Management | 0.01% | Reduce -5.9% | 323,412 | $12.7M |
| Bank of New York Mellon Corp | 0.00% | Reduce -3.2% | 314,609 | $12.4M |
| Tidal Investments LLC | 0.04% | Add +73.4% | 313,815 | $12.3M |
| JPMorgan Chase & Co. | 0.00% | Add +49.8% | 297,573 | $11.3M |
| Oasis Management Co Ltd. | 1.46% | Add +15.4% | 270,088 | $10.6M |
| New York State Common Retirement Fund | 0.01% | Reduce -14.5% | 259,436 | $10.2M |
| Jacobs Levy Equity Management, Inc. | 0.04% | New | 244,252 | $9.6M |
| Kerrisdale Advisers, LLC | 3.35% | Reduce -15.1% | 223,755 | $8.8M |
| Steamboat Capital Partners, LLC | 2.18% | Reduce -55.7% | 223,391 | $8.8M |
| T. Rowe Price Associates Inc. | 0.00% | Add +358.2% | 216,955 | $8.5M |
| Ameriprise Financial Inc. | 0.00% | Reduce -32.2% | 212,247 | $8.4M |
| Wells Fargo & Company | 0.00% | Add +144.2% | 204,051 | $8.0M |
| Citadel Advisors | 0.01% | Add +42.2% | 203,378 | $8.0M |
| Public Sector Pension Investment Board | 0.02% | Add +3.4% | 190,626 | $7.5M |
| Storebrand Asset Management As | 0.02% | New | 180,000 | $7.1M |
| Russell Investments Group, Ltd. | 0.01% | Reduce -2.0% | 160,933 | $6.3M |
| American Century Companies Inc. | 0.00% | Reduce -0.9% | 150,549 | $5.9M |
| Rhumbline Advisers | 0.00% | Add +2.8% | 142,011 | $5.6M |
| Matthews International Capital Management LLC | 2.22% | Reduce -25.9% | 138,815 | $5.5M |
| HRT Financial LP | 0.01% | Add +31.5% | 129,328 | $5.1M |
| Legal & General Group Plc | 0.00% | Reduce -5.8% | 126,296 | $5.0M |
| Renaissance Technologies | 0.01% | Reduce -1.5% | 122,600 | $4.8M |
| Dodge & Cox | 0.00% | Add +6.7% | 119,892 | $4.7M |
| Nuveen, LLC | 0.00% | Add +4.2% | 111,889 | $4.4M |
| Swiss National Bank | 0.00% | Add +1.5% | 106,600 | $4.2M |
| Kennedy Capital Management LLC | 0.09% | Reduce -26.0% | 103,456 | $4.1M |
| Thompson Siegel & Walmsley LLC | 0.07% | Reduce -46.4% | 101,100 | $4.0M |
| Franklin Resources Inc. | 0.00% | New | 96,422 | $3.8M |
| Nearwater Capital Markets, Ltd | 0.09% | Reduce -73.2% | 94,200 | $3.7M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +7.4% | 92,243 | $3.6M |
| Group One Trading LLC | 0.12% | Reduce -14.6% | 91,427 | $3.6M |
| RPg Family Wealth Advisory, LLC | 0.75% | Reduce -32.5% | 91,030 | $3.6M |
| Segall Bryant & Hamill, LLC | 0.05% | Reduce -17.4% | 87,964 | $3.5M |
| Sei Investments Co. | 0.00% | Add +45.4% | 85,005 | $3.3M |
| Portolan Capital Management, LLC | 0.17% | Reduce -70.8% | 83,256 | $3.3M |
| Kendall Capital Management | 0.67% | Reduce -1.3% | 83,131 | $3.3M |
| LPL Financial LLC | 0.00% | Reduce -24.9% | 83,038 | $3.3M |
| Intrinsic Edge Capital Management LLC | 0.57% | New | 80,000 | $3.1M |
| Deutsche Bank AG | 0.00% | Add +8.6% | 79,855 | $3.1M |
| Y-Intercept (Hong Kong) Ltd | 0.06% | New | 76,212 | $3.0M |
| Gilder Gagnon Howe & Co. LLC | 0.03% | Add +41.5% | 71,245 | $2.8M |
| Mackenzie Financial Corp. | 0.00% | Add +25.1% | 70,879 | $2.8M |
| Horiko Capital Management LLC | 0.60% | New | 66,000 | $2.6M |
| Millennium Management | 0.00% | Add +179.0% | 65,560 | $2.6M |
| California State Teachers Retirement System | 0.00% | Add +32.4% | 63,131 | $2.5M |
| Hussman Strategic Advisors, Inc. | 0.54% | No change | 63,000 | $2.5M |
| Inspire Investing, LLC | 0.14% | Add +16.3% | 62,712 | $2.5M |
| Victory Capital Management Inc. | 0.00% | Reduce -29.1% | 60,118 | $2.4M |
| Susquehanna International Group, LLP | 0.00% | Add +195.2% | 59,747 | $2.4M |
| Alliancebernstein L.P. | 0.00% | Add +1.8% | 58,043 | $2.3M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.00% | New | 57,148 | $2.2M |
| XTX Topco Ltd | 0.04% | New | 56,466 | $2.2M |
| Bessemer Group Inc. | 0.00% | Reduce -33.2% | 55,933 | $2.2M |
| Prudential Financial Inc. | 0.00% | Add +9.8% | 54,100 | $2.1M |
| Quantinno Capital Management LP | 0.00% | Reduce -2.5% | 53,925 | $2.1M |
| BNP Paribas Financial Markets | 0.00% | Reduce -52.8% | 53,539 | $2.1M |
| State Board of Administration of Florida Retirement System | 0.00% | Reduce -17.9% | 52,543 | $2.1M |
| Two Sigma Investments, LP | 0.00% | New | 52,416 | $2.1M |
| Barclays PLC | 0.00% | Reduce -54.0% | 49,194 | $1.9M |
| Balyasny Asset Management L.P. | 0.00% | New | 47,076 | $1.9M |
| Acadian Asset Management LLC | 0.00% | Add +289.6% | 45,500 | $1.8M |
| Informed Momentum Co LLC | 0.20% | New | 43,874 | $1.7M |
| CANADA LIFE ASSURANCE Co | 0.00% | Reduce -3.6% | 43,426 | $1.7M |
| Lazard Asset Management LLC | 0.00% | New | 43,034 | $1.7M |
| Engineers Gate Manager LP | 0.02% | New | 42,941 | $1.7M |
| Focus Partners Wealth | 0.00% | Reduce -0.3% | 42,259 | $1.7M |
"% of holder's portfolio" is ACMR's weight in each manager's 13F, not the share of Acm Research Inc. Class A the manager owns.