13F Insight
DOSSIER · 13F Holders · Q1 2026High-convictionMulti-bagger
ACMR

ACM Research

319 institutions still hold ACM Research as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 00108j109·319 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 4.8%
vs prior quarter
13F value held
$1.2B
78.0% inst. owned
of float
Holders
319
-1 QoQ
filers reporting
Activity
+16 / −107
+902 added · −916 reduced
this quarter
Concentration
26.88%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

319 institutions reported ACMR in Q1 2026. BlackRock, Inc. leads at 26.9% of the visible book. -1 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$314M8.0M0.01%Q1 202602
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$89M2.3M0.00%Q1 202603
Vanguard Portfolio Management
CIK 0002100121
$87M2.2M0.00%Q1 202604
STATE STREET CORP
CIK 0000093751
$79M2.0M0.00%Q1 202605
WCM INVESTMENT MANAGEMENT, LLC
CIK 0001061186
$71M1.9M0.16%Q1 202606
CITIGROUP INC
CIK 0000831001
$63M1.6M0.03%Q1 202607
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$54M1.4M0.00%Q1 202608
MORGAN STANLEY
CIK 0000895421
$47M1.2M0.00%Q1 202609
JANUS HENDERSON GROUP PLC
CIK 0001274173
$43M1.1M0.02%Q1 202610
Value Aligned Research Advisors, LLC
CIK 0001963565
$38M956K0.18%Q1 202611
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$36M926K0.00%Q1 202612
Invesco Ltd.
CIK 0000914208
$31M787K0.00%Q1 202613
SOUTHEASTERN ASSET MANAGEMENT INC/TN/
CIK 0000807985
$31M783K1.52%Q1 202614
Qube Research & Technologies Ltd
CIK 0001729829
$29M724K0.03%Q1 202615
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$28M719K0.01%Q1 202616
Tekne Capital Management, LLC
CIK 0001558971
$28M715K11.89%Q1 202617
Longaeva Partners L.P.
CIK 0002054122
$28M708K1.03%Q1 202618
CITADEL ADVISORS LLC
CIK 0001423053
$25M632K0.00%Q4 202519
FMR LLC
CIK 0000315066
$25M629K0.00%Q1 202620
Tidal Investments LLC
CIK 0001600064
$25M628K0.05%Q1 2026
Page 1 of 16
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