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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
AAP
151
Arax Advisory Partners
Colorado
$1.67K +$987 +209 +1,742%
SHIM
152
Stone House Investment Management
Pennsylvania
$1.39K +$1.5K +318 New
Jones Financial Companies
153
Jones Financial Companies
Missouri
$1.1K – – –
PWMG
154
Prestige Wealth Management Group
New Jersey
$1.05K – – –
FFA
155
Farther Finance Advisors
California
$788 +$382 +81 +85%
WPA
156
Wealth Preservation Advisors
Tennessee
$476 +$515 +109 New
KFAS
157
Keating Financial Advisory Services
Kansas
$376 +$397 +84 +4,200%
MCM
158
MAI Capital Management
Ohio
$341 +$368 +78 New
PFBT
159
Parkside Financial Bank & Trust
Missouri
$289 -$600 -127 -66%
FMII
160
Farmers & Merchants Investments Inc
Nebraska
$262 – – –
AW
161
Ankerstar Wealth
Texas
$262 +$217 +46 +329%
RFP
162
Root Financial Partners
California
$184 +$198 +42 New
GWM
163
Gilpin Wealth Management
Colorado
$57 +$19 +4 +44%
SIC
164
SJS Investment Consulting
Ohio
$27 +$28 +6 New
Wellington Management Group
165
Wellington Management Group
Massachusetts
– -$3.86M -764,279 Closed
Point72 Asset Management
166
Point72 Asset Management
Connecticut
– -$577K -114,256 Closed
Jane Street
167
Jane Street
New York
– -$398K -78,758 Closed
CAU
168
Caxton Associates (UK)
– -$229K -45,376 Closed
QT
169
Quantbot Technologies
New York
– -$195K -38,533 Closed
XT
170
XTX Topco
Cayman Islands
– -$175K -34,565 Closed
Los Angeles Capital Management
171
Los Angeles Capital Management
California
– -$105K -27,420 Closed
ACM
172
Aquatic Capital Management
Illinois
– -$1.54K -306 Closed
SAM
173
Smartleaf Asset Management
Massachusetts
– -$640 -127 Closed
CA
174
Clearstead Advisors
Ohio
– -$122 -24 Closed
CMA
175
Cedar Mountain Advisors
Oregon
– -$106 -21 Closed
3 4 5 6
7

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.