We are live on ! Find out more
CTKB icon

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
Citadel Advisors
26
Citadel Advisors
Florida
$2.06M +$1.44M +304,638 +183%
HF
27
HRT Financial
New York
$1.81M -$111K -23,601 -5%
Acadian Asset Management
28
Acadian Asset Management
Massachusetts
$1.74M -$1.3M -275,487 -41%
Public Sector Pension Investment Board (PSP Investments)
29
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$1.72M +$72.9K +15,444 +4%
Invesco
30
Invesco
Georgia
$1.7M -$49.9K -10,564 -3%
Tudor Investment Corp
31
Tudor Investment Corp
Connecticut
$1.4M +$1.51M +320,715 New
Arrowstreet Capital
32
Arrowstreet Capital
Massachusetts
$1.4M -$197K -41,768 -12%
JP Morgan Chase
33
JP Morgan Chase
New York
$1.29M -$141K -29,763 -9%
Fidelity Investments
34
Fidelity Investments
Massachusetts
$1.24M +$233K +49,314 +21%
American Century Companies
35
American Century Companies
Missouri
$1.23M -$14K -2,963 -1%
D.E. Shaw & Co
36
D.E. Shaw & Co
New York
$1.14M -$14.2K -3,001 -1%
Jacobs Levy Equity Management
37
Jacobs Levy Equity Management
New Jersey
$1.12M -$32.5K -6,885 -3%
RhumbLine Advisers
38
RhumbLine Advisers
Massachusetts
$1.11M +$21.9K +4,649 +2%
N
39
Nuveen
North Carolina
$1.07M -$39.1K -8,287 -3%
Connor, Clark & Lunn Investment Management (CC&L)
40
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$1.06M -$256K -54,132 -18%
Ameriprise
41
Ameriprise
Minnesota
$818K -$71K -15,046 -7%
UBS Group
42
UBS Group
Switzerland
$817K -$1.29M -273,166 -59%
Legal & General Group
43
Legal & General Group
United Kingdom
$799K -$26.5K -5,608 -3%
AllianceBernstein
44
AllianceBernstein
Tennessee
$712K – – –
IC
45
IEQ Capital
California
$631K +$96.3K +20,401 +16%
VOYA Investment Management
46
VOYA Investment Management
Georgia
$618K +$206K +43,555 +45%
Prudential Financial
47
Prudential Financial
New Jersey
$514K +$50.7K +10,740 +10%
Franklin Resources
48
Franklin Resources
California
$498K +$489K +103,616 +1,000%
N
49
Numerai
California
$491K -$351K -74,304 -40%
GCP
50
GSA Capital Partners
United Kingdom
$477K +$515K +109,116 New
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.