Jane Street
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Jane Street’s Cytek Biosciences CTKB Stock Holding History

Jane Street’s Portfolio CTKB Stock Details CTKB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2023
Q4 		– Sell
-20,000
Closed -$110K – 9251
2023
Q3 		$110K Sell
20,000
-41,100
-67% -$330K ﹤0.01% 7911
2023
Q2 		$522K Buy
61,100
+21,000
+52% +$188K ﹤0.01% 6256
2023
Q1 		$369K Sell
40,100
-4,200
-9% -$45.2K ﹤0.01% 6844
2022
Q4 		$452K Sell
44,300
-70,700
-61% -$950K ﹤0.01% 6309
2022
Q3 		$1.69M Buy
+115,000
New +$1.49M ﹤0.01% 4492

Other funds holding CTKB

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
HA
HHLR Advisors Grand Cayman, Cayman Islands $832M AUM 32.38% 1-Year Est. Return
TCM
Topline Capital Management Santa Monica, California $386M AUM 2.37% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

Jane Street's CTKB Position: Q2 2026 in Review

Jane Street opened a new position in Cytek Biosciences (CTKB) in Q2 2026: 906,162 shares worth $4.01M. The stake represents ﹤0.01% of the portfolio and ranks #4032 among its holdings. This is a return to the name: Jane Street previously reported a position in CTKB as recently as Q4 2025.

Jane Street first reported a position in CTKB in Q1 2022 and has held it in 16 quarters since. 155 funds tracked by Wall St. Rank hold CTKB as of Q2 2026.

  • Jane Street held 906,162 shares of Cytek Biosciences worth $4.01M as of Q2 2026.
  • Cytek Biosciences was a new Jane Street position in Q2 2026.
  • Cytek Biosciences made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #4032 holding.
  • Jane Street first reported a position in Cytek Biosciences in Q1 2022 and has held it in 16 quarters since.
  • 155 funds tracked by Wall St. Rank held Cytek Biosciences as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.