ACM RESEARCH INC-CLASS A (ACMR) Institutional Ownership Changes & 13F Activity
ACM RESEARCH INC-CLASS A (ACMR). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include California State Teachers Retirement System, Citadel Advisors Llc, Longaeva Partners L.P., Longleaf Partners, and Gilder Gagnon Howe & Co Llc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Manufacturers Life Insurance Company, The | Buy | +32,483 | +131.1% | 57,268 | $7.27M | Q2 2026 | Sep 09, 2026 |
| Integrated Wealth Concepts Llc | Buy | +5,454 | — | 5,454 | $692.06K | Q2 2026 | Sep 09, 2026 |
| Parkside Financial Bank & Trust | Buy | +10 | +11.2% | 99 | $12.56K | Q2 2026 | Sep 04, 2026 |
| Citadel Advisors Llc | Buy | +1,070,294 | +526.3% | 1,273,672 | $161.62M | Q2 2026 | Sep 02, 2026 |
| California State Teachers Retirement System | Buy | +7,572,158 | +11994.4% | 7,635,289 | $7.64M | Q2 2026 | Aug 24, 2026 |
| Spx Gestao De Recursos Ltda | Buy | +27,630 | — | 27,630 | $3.51M | Q2 2026 | Aug 19, 2026 |
| Mercer Global Advisors Inc | Buy | +10,698 | — | 10,698 | $1.36M | Q2 2026 | Aug 19, 2026 |
| Value Aligned Research Advisors, Llc | Buy | +98,022 | +10.3% | 1,053,949 | $133.74M | Q2 2026 | Aug 17, 2026 |
| Empowered Funds, Llc | Buy | +1,802 | — | 1,802 | $228.66K | Q2 2026 | Aug 17, 2026 |
| Longaeva Partners L.P. | Sell | -690,647 | -97.5% | 17,732 | $2.25M | Q2 2026 | Aug 14, 2026 |
| Longleaf Partners | Sell | -643,422 | -82.2% | 139,478 | $17.70M | Q2 2026 | Aug 14, 2026 |
| Gilder Gagnon Howe & Co Llc | Buy | +565,813 | +794.2% | 637,058 | $80.84M | Q2 2026 | Aug 14, 2026 |
| Sixth Street Partners Management Company, L.P. | Buy | +526,760 | — | 526,760 | $66.84M | Q2 2026 | Aug 14, 2026 |
| Qube Research & Technologies Ltd | Sell | -444,390 | -61.3% | 280,015 | $35.53M | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +382,979 | +48.7% | 1,170,080 | $148.47M | Q2 2026 | Aug 14, 2026 |
| Price T Rowe Associates Inc | Buy | +374,618 | +172.7% | 591,573 | $75.07M | Q2 2026 | Aug 14, 2026 |
| Wells Fargo & Company/Mn | Sell | -349,475 | -85.6% | 58,627 | $7.44M | Q2 2026 | Aug 14, 2026 |
| Cederberg Capital Ltd | Sell | -344,531 | -57.5% | 254,669 | $32.31M | Q2 2026 | Aug 14, 2026 |
| Ameriprise Financial Inc | Sell | -309,316 | -72.9% | 115,178 | $14.61M | Q2 2026 | Aug 14, 2026 |
| My.Alpha Management Hk Advisors Ltd | Buy | +249,500 | — | 249,500 | $31.66M | Q2 2026 | Aug 14, 2026 |
| Wexford Capital Lp | Sell | -243,846 | -40.7% | 355,400 | $45.10M | Q2 2026 | Aug 14, 2026 |
| 12 West Capital Management Lp | Buy | +218,900 | +3588.5% | 225,000 | $28.55M | Q2 2026 | Aug 14, 2026 |
| Susquehanna International Group, Llp | Buy | +193,924 | +324.6% | 253,671 | $32.19M | Q2 2026 | Aug 14, 2026 |
| Wellington Management Group Llp | Buy | +174,987 | — | 174,987 | $22.20M | Q2 2026 | Aug 14, 2026 |
| Kerrisdale Advisers, Llc | Sell | -161,185 | -72.0% | 62,570 | $7.94M | Q2 2026 | Aug 14, 2026 |
| Two Sigma Investments, Lp | Buy | +160,128 | +305.5% | 212,544 | $26.97M | Q2 2026 | Aug 14, 2026 |
| Nomura Asset Management International Inc. | Buy | +152,522 | +907.9% | 169,322 | $21.48M | Q2 2026 | Aug 14, 2026 |
| Goldman Sachs Group Inc | Sell | -126,061 | -22.8% | 426,243 | $54.09M | Q2 2026 | Aug 14, 2026 |
| Portolan Capital Management, Llc | Buy | +94,176 | +113.1% | 177,432 | $22.51M | Q2 2026 | Aug 14, 2026 |
| Bank Of America Corp | Buy | +77,294 | +19.2% | 479,706 | $60.87M | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about ACMR activity
Which institutional owners are buying ACMR?
Institutional owners buying ACMR include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in ACMR activity?
"Buy" means an investor increased their reported position in ACMR compared to the prior reporting period. This reflects growing exposure to ACM RESEARCH INC-CLASS A (ACMR) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in ACMR increasing?
Institutional interest in ACMR can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related ACMR Institutional Insights
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