ACMR ACM Research, Inc.

NASDAQ
$72.00

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 June 30, 2026.

Managers compared
409
filed both this quarter and last
Managers holding
371
+76 on the quarter
Buyers
240
114 opened new
Sellers
131
38 sold out entirely
Buyer share
64.7%
of managers who traded it
Breadth
+29.4
net buyers, as a share of those trading

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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Ownership map

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.

Cut Unchanged Added Color saturates at ±50%.

Largest holders

Manager Shares % of reported
BlackRock, Inc. 8.7M 17.8%
VANGUARD PORTFOLIO MANAGEMENT LLC 3.3M 6.9%
VANGUARD CAPITAL MANAGEMENT LLC 2.5M 5.1%
Capital World Investors 2.4M 4.9%
STATE STREET CORP 2.2M 4.5%
GEODE CAPITAL MANAGEMENT, LLC 1.5M 3.1%
Invesco Ltd. 1.2M 2.4%
Value Aligned Research Advisors, LLC 1.1M 2.2%
WFM ASIA (BVI) Ltd 969.2K 2.0%
DIMENSIONAL FUND ADVISORS LP 954.5K 2.0%
WCM INVESTMENT MANAGEMENT, LLC 917.7K 1.9%
Polunin Capital Partners Ltd 748.5K 1.5%
Tekne Capital Management, LLC 737.5K 1.5%
MORGAN STANLEY 700.2K 1.4%
FMR LLC 672.2K 1.4%
FULLER & THALER ASSET MANAGEMENT, INC. 639.4K 1.3%
GILDER GAGNON HOWE & CO LLC 637.1K 1.3%
CITADEL ADVISORS LLC 636.8K 1.3%
Capital International Investors 623.4K 1.3%
PRICE T ROWE ASSOCIATES INC /MD/ 591.6K 1.2%
NORTHERN TRUST CORP 569.1K 1.2%
Jupiter Topco LLC 553.8K 1.1%
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 526.8K 1.1%
BANK OF AMERICA CORP /DE/ 479.7K 1.0%
Tidal Investments LLC 470.9K 1.0%

Largest changes

Manager Action Previous Current Change
Capital World Investors New 0 2.4M +2.4M
VANGUARD PORTFOLIO MANAGEMENT LLC Increased 2.2M 3.3M +1.1M
WFM ASIA (BVI) Ltd New 0 969.2K +969.2K
WCM INVESTMENT MANAGEMENT, LLC Reduced 1.9M 917.7K -943.2K
Longaeva Partners L.P. Reduced 708.4K 17.7K -690.6K
BlackRock, Inc. Increased 8.0M 8.7M +676.0K
SOUTHEASTERN ASSET MANAGEMENT INC/TN/ Reduced 782.9K 139.5K -643.4K
FULLER & THALER ASSET MANAGEMENT, INC. New 0 639.4K +639.4K
Capital International Investors New 0 623.4K +623.4K
Oxbow Capital Management (HK) Ltd Sold Out 596.7K 0 -596.7K
GILDER GAGNON HOWE & CO LLC Increased 71.2K 637.1K +565.8K
LSV ASSET MANAGEMENT Reduced 545.3K 12.1K -533.2K
MORGAN STANLEY Reduced 1.2M 700.2K -492.5K
Qube Research & Technologies Ltd Reduced 724.4K 280.0K -444.4K
CITADEL ADVISORS LLC Increased 203.4K 636.8K +433.5K
CITIGROUP INC Reduced 619.9K 209.8K -410.0K
Invesco Ltd. Increased 787.1K 1.2M +383.0K
PRICE T ROWE ASSOCIATES INC /MD/ Increased 217.0K 591.6K +374.6K
Cederberg Capital Ltd Reduced 599.2K 254.7K -344.5K
MY.Alpha Management HK Advisors Ltd New 0 249.5K +249.5K
WEXFORD CAPITAL LP Reduced 599.2K 355.4K -243.8K
DIMENSIONAL FUND ADVISORS LP Increased 719.0K 954.5K +235.5K
12 West Capital Management LP Increased 6.1K 225.0K +218.9K
VANGUARD CAPITAL MANAGEMENT LLC Increased 2.3M 2.5M +198.4K
MACKENZIE FINANCIAL CORP Increased 70.9K 268.0K +197.1K
SUSQUEHANNA INTERNATIONAL GROUP, LLP Increased 59.7K 253.7K +193.9K
STATE STREET CORP Increased 2.0M 2.2M +182.1K
WELLINGTON MANAGEMENT GROUP LLP New 0 175.0K +175.0K
Kerrisdale Advisers, LLC Reduced 223.8K 62.6K -161.2K
TWO SIGMA INVESTMENTS, LP Increased 52.4K 212.5K +160.1K
Tidal Investments LLC Increased 313.8K 470.9K +157.1K
NOMURA ASSET MANAGEMENT INTERNATIONAL INC. Increased 16.8K 169.3K +152.5K
WELLS FARGO & COMPANY/MN Reduced 204.1K 58.6K -145.4K
GOLDMAN SACHS GROUP INC Reduced 552.3K 426.2K -126.1K
BRIGHT VALLEY CAPITAL Ltd New 0 118.0K +118.0K
GEODE CAPITAL MANAGEMENT, LLC Increased 1.4M 1.5M +116.6K
CONGRESS ASSET MANAGEMENT CO Reduced 339.9K 223.9K -116.0K
Mitsubishi UFJ Trust & Banking Corp Reduced 465.8K 351.2K -114.6K
Penn Capital Management Company, LLC Reduced 397.8K 285.8K -112.0K
RENAISSANCE TECHNOLOGIES LLC Increased 122.6K 229.8K +107.2K
RPg Family Wealth Advisory, LLC Increased 91.0K 196.3K +105.3K
STOREBRAND ASSET MANAGEMENT AS Reduced 180.0K 80.5K -99.5K
Value Aligned Research Advisors, LLC Increased 955.9K 1.1M +98.0K
AMERIPRISE FINANCIAL INC Reduced 212.2K 115.2K -97.1K
Nearwater Capital Markets, Ltd Sold Out 94.2K 0 -94.2K
Portolan Capital Management, LLC Increased 83.3K 177.4K +94.2K
HRT FINANCIAL LP Reduced 129.3K 35.2K -94.1K
SEGALL BRYANT & HAMILL, LLC Sold Out 88.0K 0 -88.0K
JPMORGAN CHASE & CO Reduced 297.6K 214.9K -82.7K
BANK OF AMERICA CORP /DE/ Increased 402.4K 479.7K +77.3K
Y-Intercept (Hong Kong) Ltd Sold Out 76.2K 0 -76.2K
KENNEDY CAPITAL MANAGEMENT LLC Reduced 103.5K 28.5K -74.9K
MILLENNIUM MANAGEMENT LLC Increased 65.6K 140.5K +74.9K
FIRST TRUST ADVISORS LP Reduced 374.0K 306.0K -68.0K
NEW YORK STATE COMMON RETIREMENT FUND Reduced 259.4K 191.5K -67.9K
GROUP ONE TRADING LLC Increased 91.4K 157.1K +65.6K
Atika Capital Management LLC New 0 63.0K +63.0K
HUSSMAN STRATEGIC ADVISORS, INC. Sold Out 63.0K 0 -63.0K
VANGUARD FIDUCIARY TRUST CO Increased 341.4K 404.1K +62.7K
Russell Investments Group, Ltd. Increased 160.9K 221.8K +60.8K

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.