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 $5.72T AUM 30.48% 1-Year Est. Return
TCM
Topline Capital Management Santa Monica, California $605M AUM 26.24% 1-Year Est. Return
HA
HHLR Advisors Grand Cayman, Cayman Islands $1.67B AUM 7.53% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $95.5B AUM 28.4% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

Jane Street's CTKB Position: Q1 2026 in Review

Jane Street sold out of Cytek Biosciences (CTKB) in Q1 2026, closing a stake of 78,758 shares — an estimated $398K sold.

Jane Street first reported a position in CTKB in Q1 2022 and held it in 15 quarters. The position peaked at $1.82M in Q4 2023. 165 funds tracked by Wall St. Rank hold CTKB as of Q1 2026.

  • Jane Street reported no remaining Cytek Biosciences position as of Q1 2026 after selling out during the quarter.
  • Jane Street sold 78,758 Cytek Biosciences shares in Q1 2026, an estimated $398K.
  • Jane Street first reported a position in Cytek Biosciences in Q1 2022 and held it in 15 quarters.
  • Jane Street's Cytek Biosciences position peaked at $1.82M in Q4 2023.
  • 165 funds tracked by Wall St. Rank held Cytek Biosciences as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.