ACM Research, Inc.: which funds bought and sold
Institutions that bought and sold ACM Research shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 240 institutions that filed 13F reports for both quarters added to or opened positions in ACM Research, and 131 cut or closed them. Together they added a net 4.8M shares, +11.0% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 2.0M shares (+26.2%); index fund managers were net buyers of 2.4M shares (+13.9%). 116 opened a new position and 39 sold out entirely.
Bought, Q2 2026 240 institutions, 116 of them new holders Sold, Q2 2026 131 institutions, 39 of them sold out
Net change, all compared +4.8M shares (+11.0%)
Net change, active managers +2.0M shares (+26.2%), 30 bought, 23 sold
Buyers versus sellers
240 bought 37 131 sold
Active managers and hedge funds 30 bought · 23 sold · +2.0M
Index fund managers 9 bought · 2 sold · +2.4M
Other institutions 201 bought · 106 sold · +349K
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Capital World Investors Active manager | +2.4M New position | 2.4M | $304M |
| Vanguard Portfolio Management LLC Index funds | +1.1M +52.0% | 3.3M | $425M |
| Wfm Asia (BVI) Ltd | +969K New position | 969K | $123M |
| Blackrock, Inc. Index funds | +676K +8.5% | 8.7M | $1.1B |
| Fuller & Thaler Asset Management, Inc. | +639K New position | 639K | $81.1M |
| Capital International Investors Active manager | +623K New position | 623K | $79.1M |
| Gilder Gagnon Howe & Co LLC Active manager | +566K +794.2% | 637K | $80.8M |
| Citadel Advisors LLC Hedge fund | +433K +213.1% | 637K | $80.8M |
| Invesco Ltd. | +383K +48.7% | 1.2M | $148M |
| Price T Rowe Associates Inc Active manager | +375K +172.7% | 592K | $75.1M |
| My.Alpha Management Hk Advisors Ltd | +250K New position | 250K | $31.7M |
| Dimensional Fund Advisors LP | +235K +32.7% | 954K | $121M |
| 12 West Capital Management LP | +219K +3588.5% | 225K | $28.6M |
| Vanguard Capital Management LLC Index funds | +198K +8.8% | 2.5M | $312M |
| Mackenzie Financial Corp | +197K +278.1% | 268K | $34M |
| Susquehanna International Group, LLP | +194K +324.6% | 254K | $32.2M |
| State Street Corp Index funds | +182K +9.1% | 2.2M | $278M |
| Wellington Management Group LLP Active manager | +175K New position | 175K | $22.2M |
| Two Sigma Investments, LP Hedge fund | +160K +305.5% | 213K | $27M |
| Tidal Investments LLC | +157K +50.1% | 471K | $59.8M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Capital World Investors Active manager | +2.4M New position | 2.4M | $304M |
| Capital International Investors Active manager | +623K New position | 623K | $79.1M |
| Gilder Gagnon Howe & Co LLC Active manager | +566K +794.2% | 637K | $80.8M |
| Citadel Advisors LLC Hedge fund | +433K +213.1% | 637K | $80.8M |
| Price T Rowe Associates Inc Active manager | +375K +172.7% | 592K | $75.1M |
| Wellington Management Group LLP Active manager | +175K New position | 175K | $22.2M |
| Two Sigma Investments, LP Hedge fund | +160K +305.5% | 213K | $27M |
| Renaissance Technologies LLC Hedge fund | +107K +87.4% | 230K | $29.2M |
| Millennium Management LLC Hedge fund | +75K +114.3% | 141K | $17.8M |
| Franklin Resources Inc Active manager | +49K +50.8% | 145K | $18.4M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| WCM Investment Management, LLC Active manager | −943K −50.7% | 918K | $109M |
| Longaeva Partners L.P. | −691K −97.5% | 18K | $2.3M |
| Southeastern Asset Management Inc Active manager | −643K −82.2% | 139K | $17.7M |
| Oxbow Capital Management (HK) Ltd | −597K Sold out | 0 | — |
| LSV Asset Management Active manager | −533K −97.8% | 12K | $1.5M |
| Morgan Stanley | −493K −41.3% | 700K | $88.8M |
| Qube Research & Technologies Ltd Hedge fund | −444K −61.3% | 280K | $35.5M |
| Citigroup Inc | −410K −66.1% | 210K | $26.6M |
| Cederberg Capital Ltd | −345K −57.5% | 255K | $32.3M |
| Wexford Capital LP | −244K −40.7% | 355K | $45.1M |
| Kerrisdale Advisers, LLC | −161K −72.0% | 63K | $7.9M |
| Wells Fargo & Company | −145K −71.3% | 59K | $7.4M |
| HRT Financial LP | −129K Sold out | 0 | — |
| Goldman Sachs Group Inc | −126K −22.8% | 426K | $54.1M |
| Congress Asset Management Co Active manager | −116K −34.1% | 224K | $28.4M |
| Mitsubishi Ufj Trust & Banking Corp | −115K −24.6% | 351K | $44.6M |
| Penn Capital Management Company, LLC Active manager | −112K −28.2% | 286K | $36.3M |
| Storebrand Asset Management As | −99K −55.3% | 81K | $10.2M |
| Ameriprise Financial Inc | −97K −45.7% | 115K | $14.6M |
| Nearwater Capital Markets, Ltd | −94K Sold out | 0 | — |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| WCM Investment Management, LLC Active manager | −943K −50.7% | 918K | $109M |
| Southeastern Asset Management Inc Active manager | −643K −82.2% | 139K | $17.7M |
| LSV Asset Management Active manager | −533K −97.8% | 12K | $1.5M |
| Qube Research & Technologies Ltd Hedge fund | −444K −61.3% | 280K | $35.5M |
| Congress Asset Management Co Active manager | −116K −34.1% | 224K | $28.4M |
| Penn Capital Management Company, LLC Active manager | −112K −28.2% | 286K | $36.3M |
| Segall Bryant & Hamill, LLC Active manager | −88K Sold out | 0 | — |
| Kennedy Capital Management LLC Active manager | −75K −72.4% | 29K | $3.6M |
| Jacobs Levy Equity Management, Inc Active manager | −52K −21.4% | 192K | $24.4M |
| American Century Companies Inc Active manager | −49K −32.8% | 101K | $12.8M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Capital World InvestorsActive manager | 2.4M | $304M |
| Wfm Asia (BVI) Ltd | 969K | $123M |
| Fuller & Thaler Asset Management, Inc. | 639K | $81.1M |
| Capital International InvestorsActive manager | 623K | $79.1M |
| My.Alpha Management Hk Advisors Ltd | 250K | $31.7M |
| Wellington Management Group LLPActive manager | 175K | $22.2M |
| Bright Valley Capital Ltd | 118K | $15M |
| Atika Capital Management LLC | 63K | $8M |
| Quadrature Capital LtdHedge fund | 49K | $6.2M |
| Centerbook Partners LPHedge fund | 41K | $5.3M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Oxbow Capital Management (HK) Ltd | 597K | $23.5M |
| HRT Financial LP | 129K | $5.1M |
| Nearwater Capital Markets, Ltd | 94K | $3.7M |
| Segall Bryant & Hamill, LLCActive manager | 88K | $3.5M |
| Y-Intercept (Hong Kong) Ltd | 76K | $3M |
| Hussman Strategic Advisors, Inc. | 63K | $2.5M |
| Balyasny Asset Management L.P.Hedge fund | 47K | $1.9M |
| Boothbay Fund Management, LLCHedge fund | 38K | $1.5M |
| Capelight Capital Asset Management LP | 30K | $1.2M |
| Gsa Capital Partners LLP | 27K | $1.1M |
Who holds the shares
- Institutions reporting
- 374
- Ten largest holders
- 50.8% of 13F-reported shares
- Index fund managers
- 40.7% of 13F-reported shares
- Active managers and hedge funds
- 19.7% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 30 | 23 | 18 | 5 | +2.0M | +26.2% |
| Index fund managers | 9 | 2 | 1 | 0 | +2.4M | +13.9% |
| Other institutions | 201 | 106 | 97 | 34 | +349K | +1.9% |