XT
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XTX Topco’s Cytek Biosciences CTKB Stock Holding History

XTX Topco’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 		$632K Buy
+142,723
New +$609K 0.01% 2237
2026
Q1 		– Sell
-34,565
Closed -$175K – 3916
2025
Q4 		$175K Sell
34,565
-37,981
-52% -$176K ﹤0.01% 2454
2025
Q3 		$252K Sell
72,546
-42,855
-37% -$161K 0.01% 1652
2025
Q2 		$392K Sell
115,401
-54,878
-32% -$183K 0.02% 1268
2025
Q1 		$683K Buy
170,279
+149,373
+714% +$774K 0.03% 796
2024
Q4 		$136K Sell
20,906
-5,244
-20% -$31.2K 0.01% 1697
2024
Q3 		$145K Buy
+26,150
New +$148K 0.01% 1537
2024
Q2 		– Sell
-19,844
Closed -$133K – 1974
2024
Q1 		$133K Buy
+19,844
New +$157K 0.02% 1290

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

XTX Topco's CTKB Position: Q2 2026 in Review

XTX Topco opened a new position in Cytek Biosciences (CTKB) in Q2 2026: 142,723 shares worth $632K. The stake represents 0.01% of the portfolio and ranks #2237 among its holdings. This is a return to the name: XTX Topco previously reported a position in CTKB as recently as Q4 2025.

XTX Topco first reported a position in CTKB in Q1 2024 and has held it in 8 quarters since. The position peaked at $683K in Q1 2025. 154 funds tracked by Wall St. Rank hold CTKB as of Q2 2026.

  • XTX Topco held 142,723 shares of Cytek Biosciences worth $632K as of Q2 2026.
  • Cytek Biosciences was a new XTX Topco position in Q2 2026.
  • Cytek Biosciences made up 0.01% of XTX Topco's portfolio in Q2 2026, its #2237 holding.
  • XTX Topco first reported a position in Cytek Biosciences in Q1 2024 and has held it in 8 quarters since.
  • XTX Topco's Cytek Biosciences position peaked at $683K in Q1 2025.
  • 154 funds tracked by Wall St. Rank held Cytek Biosciences as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.