13F Insight
DOSSIER · 13F Holders · Q1 2026Mega-capCrowded
CTKB

Cytek Biosciences Inc

167 institutions still hold Cytek Biosciences Inc as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 23285d109·167 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 8.2%
vs prior quarter
13F value held
$319M
45.0% inst. owned
of float
Holders
167
+84 QoQ
filers reporting
Activity
+28 / −16
+838 added · −695 reduced
this quarter
Concentration
23.30%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

167 institutions reported CTKB in Q1 2026. BlackRock, Inc. leads at 23.3% of the visible book. +84 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$74M17.0M0.00%Q1 202602
Topline Capital Management, LLC
CIK 0001792549
$31M7.1M5.10%Q1 202603
HHLR ADVISORS, LTD.
CIK 0001762304
$29M6.7M1.74%Q1 202604
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$27M6.3M0.01%Q1 202605
Boston Partners
CIK 0001386060
$25M5.8M0.03%Q1 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$21M4.8M0.00%Q1 202607
STATE STREET CORP
CIK 0000093751
$18M4.1M0.00%Q1 202608
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$12M2.8M0.00%Q1 202609
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$12M2.7M0.00%Q1 202610
GOLDMAN SACHS GROUP INC
CIK 0000886982
$10M2.3M0.00%Q1 202611
Vanguard Portfolio Management
CIK 0002100121
$10M2.3M0.00%Q1 202612
MORGAN STANLEY
CIK 0000895421
$8M1.7M0.00%Q1 202613
ROYCE & ASSOCIATES LP
CIK 0000906304
$7M1.6M0.07%Q1 202614
BROWN CAPITAL MANAGEMENT LLC
CIK 0000885062
$6M1.5M0.92%Q1 202615
Russell Investments Group, Ltd.
CIK 0001692234
$6M1.4M0.01%Q1 202616
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$5M1.1M0.00%Q1 202617
BANK OF AMERICA CORP /DE/
CIK 0000070858
$4M1.0M0.00%Q1 202618
NORTHERN TRUST CORP
CIK 0000073124· Index
$4M1.0M0.00%Q1 202619
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$4M912K0.00%Q1 202620
Simcoe Capital LLC
CIK 0002109203
$4M882K3.54%Q1 2026
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