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Cytek Biosciences
CTKB

165 hedge funds and large institutions have $372M invested in Cytek Biosciences in 2026 Q1 according to their latest regulatory filings, with 24 funds opening new positions, 68 increasing their positions, 51 reducing their positions, and 11 closing their positions.

New
Increased
Maintained
Reduced
Closed

196% more call options, than puts

Call options by funds: $71K | Put options by funds: $24K

118% more first-time investments, than exits

New positions opened: 24 | Existing positions closed: 11

33% more repeat investments, than reductions

Existing positions increased: 68 | Existing positions reduced: 51

6% more funds holding

Funds holding: 155 → 165 (+10)

2.37% more ownership

Funds ownership: 64.15% → 66.53% (+2.4%)

0% more funds holding in top 10

Funds holding in top 10: 2 → 2 (0)

10% less capital invested

Capital invested by funds: $414M → $372M (-$42.5M)

Holders
165
Holders Change
+10
Holders Change %
+6.45%
% of All Funds
2.03%
Holding in Top 10
2
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.02%
New
24
Increased
68
Reduced
51
Closed
11
Calls
$71K
Puts
$24K
Net Calls
+$47K
Net Calls Change
+$37K

Top Buyers

1
Millennium Management
Millennium Management
New York
+$7.27M
2
Boston Partners
Boston Partners
Massachusetts
+$3.75M
3
CP
CenterBook Partners
Connecticut
+$3.45M
4
SC
Simcoe Capital
Washington
+$2.76M
5
Goldman Sachs
Goldman Sachs
New York
+$2.62M

Top Sellers

1
Wellington Management Group
Wellington Management Group
Massachusetts
-$3.86M
2
BCM
Brown Capital Management
Maryland
-$2.8M
3
TCM
Topline Capital Management
California
-$1.78M
4
Acadian Asset Management
Acadian Asset Management
Massachusetts
-$1.3M
5
UBS Group
UBS Group
Switzerland
-$1.29M
Name Holding Trade Value Shares
Change 		Change in
Stake
Deutsche Bank
51
Deutsche Bank
Germany
$456K +$53.3K +11,298 +12%
State of Wisconsin Investment Board
52
State of Wisconsin Investment Board
Wisconsin
$455K -$305K -64,517 -38%
Creative Planning
53
Creative Planning
Kansas
$393K -$148K -31,272 -26%
PP
54
PDT Partners
New York
$380K -$23.6K -5,000 -5%
T. Rowe Price Associates
55
T. Rowe Price Associates
Maryland
$351K +$48.9K +10,349 +15%
BNP Paribas Financial Markets
56
BNP Paribas Financial Markets
France
$341K -$133K -28,238 -27%
Thrivent Financial for Lutherans
57
Thrivent Financial for Lutherans
Minnesota
$321K -$10.2K -2,161 -3%
MIM
58
MetLife Investment Management
New Jersey
$282K +$31.9K +6,759 +12%
SOADOR
59
State of Alaska Department of Revenue
Alaska
$267K – – –
IMRF
60
Illinois Municipal Retirement Fund
Illinois
$266K +$287K +60,877 New
Carson Wealth (CWM LLC)
61
Carson Wealth (CWM LLC)
Nebraska
$265K +$38.3K +8,110 +15%
Wealth Enhancement Advisory Services
62
Wealth Enhancement Advisory Services
Minnesota
$260K +$175K +36,975 +103%
Cerity Partners
63
Cerity Partners
New York
$254K +$40.6K +8,595 +17%
Susquehanna International Group
64
Susquehanna International Group
Pennsylvania
$245K +$37.3K +7,907 +16%
Mirae Asset Global ETFs Holdings
65
Mirae Asset Global ETFs Holdings
Hong Kong
$241K +$2.52K +534 +1%
PAM
66
Panagora Asset Management
Massachusetts
$225K – – –
QCM
67
Quantinno Capital Management
New York
$224K +$102K +21,564 +73%
LSERS
68
Louisiana State Employees Retirement System
Louisiana
$213K -$7.55K -1,600 -3%
Wells Fargo
69
Wells Fargo
California
$198K -$413K -87,398 -66%
VGA
70
Vanguard Global Advisers
Pennsylvania
$198K +$213K +45,212 New
New York State Teachers Retirement System (NYSTRS)
71
New York State Teachers Retirement System (NYSTRS)
New York
$196K -$17.2K -3,634 -7%
AG
72
Algert Global
California
$186K +$201K +42,560 New
Canada Pension Plan Investment Board
73
Canada Pension Plan Investment Board
Ontario, Canada
$180K +$195K +41,300 New
NC
74
nVerses Capital
Florida
$167K +$181K +38,319 New
New York State Common Retirement Fund
75
New York State Common Retirement Fund
New York
$153K – – –
1 2
3
4 5

CTKB Hedge Fund Activity: Q1 2026 in Review

165 of the 8,125 institutional investors tracked by Wall St. Rank reported a position in Cytek Biosciences (CTKB) for Q1 2026, worth a combined $372M — down 10% from $414M a quarter earlier.

Buyers outnumbered sellers: 24 funds opened new CTKB positions and 11 closed out — a net gain of 13 holders — while 68 added to existing stakes and 51 trimmed.

The largest buyer was Millennium Management, adding an estimated $7.27M. The largest seller was Wellington Management Group, exiting entirely with an estimated $3.86M sold.

  • 165 institutional investors held Cytek Biosciences (CTKB) as of Q1 2026, up from 155 in Q4 2025.
  • Funds reported $372M of Cytek Biosciences stock for Q1 2026, down 10% quarter-over-quarter.
  • 24 funds opened new Cytek Biosciences positions in Q1 2026 and 11 closed out, a net change of +13 holders.
  • The largest Cytek Biosciences buyer in Q1 2026 was Millennium Management, an estimated $7.27M added.
  • The largest Cytek Biosciences seller in Q1 2026 was Wellington Management Group, an estimated $3.86M sold.

Based on aggregated 13F filings for Q1 2026.