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
2026
Q2 		$4.01M Buy
+906,162
New +$3.87M ﹤0.01% 4032
2026
Q1 		– Sell
-78,758
Closed -$398K – 11783
2025
Q4 		$398K Sell
78,758
-278,267
-78% -$1.29M ﹤0.01% 8205
2025
Q3 		$1.24M Buy
357,025
+72,187
+25% +$271K ﹤0.01% 5863
2025
Q2 		$968K Sell
284,838
-59,331
-17% -$198K ﹤0.01% 5677
2025
Q1 		$1.38M Buy
344,169
+276,972
+412% +$1.44M ﹤0.01% 4977
2024
Q4 		$436K Sell
67,197
-69,205
-51% -$412K ﹤0.01% 7062
2024
Q3 		$756K Sell
136,402
-55,914
-29% -$317K ﹤0.01% 6451
2024
Q2 		$1.07M Buy
192,316
+146,254
+318% +$878K ﹤0.01% 5630
2024
Q1 		$309K Sell
46,062
-153,186
-77% -$1.21M ﹤0.01% 7516
2023
Q4 		$1.82M Buy
199,248
+153,129
+332% +$964K ﹤0.01% 4497
2023
Q3 		$255K Buy
+46,119
New +$370K ﹤0.01% 7307
2023
Q2 		– Sell
-16,227
Closed -$146K – 8796
2023
Q1 		$149K Sell
16,227
-32,002
-66% -$344K ﹤0.01% 8018
2022
Q4 		$492K Buy
48,229
+26,469
+122% +$356K ﹤0.01% 6168
2022
Q3 		$320K Buy
21,760
+1,521
+8% +$19.8K ﹤0.01% 7480
2022
Q2 		$217K Sell
20,239
-57,380
-74% -$571K ﹤0.01% 8081
2022
Q1 		$837K Buy
+77,619
New +$1.05M ﹤0.01% 6487

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.