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.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Manufacturers Life Insurance Company, TheBuy+32,483+131.1%57,268$7.27MQ2 2026Sep 09, 2026
Integrated Wealth Concepts LlcBuy+5,4545,454$692.06KQ2 2026Sep 09, 2026
Parkside Financial Bank & TrustBuy+10+11.2%99$12.56KQ2 2026Sep 04, 2026
Citadel Advisors LlcBuy+1,070,294+526.3%1,273,672$161.62MQ2 2026Sep 02, 2026
California State Teachers Retirement SystemBuy+7,572,158+11994.4%7,635,289$7.64MQ2 2026Aug 24, 2026
Spx Gestao De Recursos LtdaBuy+27,63027,630$3.51MQ2 2026Aug 19, 2026
Mercer Global Advisors IncBuy+10,69810,698$1.36MQ2 2026Aug 19, 2026
Value Aligned Research Advisors, LlcBuy+98,022+10.3%1,053,949$133.74MQ2 2026Aug 17, 2026
Empowered Funds, LlcBuy+1,8021,802$228.66KQ2 2026Aug 17, 2026
Longaeva Partners L.P.Sell-690,647-97.5%17,732$2.25MQ2 2026Aug 14, 2026
Longleaf PartnersSell-643,422-82.2%139,478$17.70MQ2 2026Aug 14, 2026
Gilder Gagnon Howe & Co LlcBuy+565,813+794.2%637,058$80.84MQ2 2026Aug 14, 2026
Sixth Street Partners Management Company, L.P.Buy+526,760526,760$66.84MQ2 2026Aug 14, 2026
Qube Research & Technologies LtdSell-444,390-61.3%280,015$35.53MQ2 2026Aug 14, 2026
Invesco Ltd.Buy+382,979+48.7%1,170,080$148.47MQ2 2026Aug 14, 2026
Price T Rowe Associates IncBuy+374,618+172.7%591,573$75.07MQ2 2026Aug 14, 2026
Wells Fargo & Company/MnSell-349,475-85.6%58,627$7.44MQ2 2026Aug 14, 2026
Cederberg Capital LtdSell-344,531-57.5%254,669$32.31MQ2 2026Aug 14, 2026
Ameriprise Financial IncSell-309,316-72.9%115,178$14.61MQ2 2026Aug 14, 2026
My.Alpha Management Hk Advisors LtdBuy+249,500249,500$31.66MQ2 2026Aug 14, 2026
Wexford Capital LpSell-243,846-40.7%355,400$45.10MQ2 2026Aug 14, 2026
12 West Capital Management LpBuy+218,900+3588.5%225,000$28.55MQ2 2026Aug 14, 2026
Susquehanna International Group, LlpBuy+193,924+324.6%253,671$32.19MQ2 2026Aug 14, 2026
Wellington Management Group LlpBuy+174,987174,987$22.20MQ2 2026Aug 14, 2026
Kerrisdale Advisers, LlcSell-161,185-72.0%62,570$7.94MQ2 2026Aug 14, 2026
Two Sigma Investments, LpBuy+160,128+305.5%212,544$26.97MQ2 2026Aug 14, 2026
Nomura Asset Management International Inc.Buy+152,522+907.9%169,322$21.48MQ2 2026Aug 14, 2026
Goldman Sachs Group IncSell-126,061-22.8%426,243$54.09MQ2 2026Aug 14, 2026
Portolan Capital Management, LlcBuy+94,176+113.1%177,432$22.51MQ2 2026Aug 14, 2026
Bank Of America CorpBuy+77,294+19.2%479,706$60.87MQ2 2026Aug 14, 2026
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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.