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CenterBook Partners’s Cytek Biosciences CTKB Stock Holding History

CenterBook Partners’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 		$661K Sell
149,180
-580,694
-80% -$2.48M 0.03% 459
2026
Q1 		$3.19M Buy
+729,874
New +$3.45M 0.17% 160
2025
Q2 		– Sell
-845,405
Closed -$3.39M – 528
2025
Q1 		$3.39M Buy
+845,405
New +$4.38M 0.22% 130

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

CenterBook Partners's CTKB Position: Q2 2026 in Review

CenterBook Partners reduced its Cytek Biosciences (CTKB) stake by 80% in Q2 2026, selling an estimated $2.48M and leaving 149,180 shares worth $661K. The position accounts for 0.03% of the portfolio, ranked #459.

CenterBook Partners first reported a position in CTKB in Q1 2025 and has held it in 3 quarters since. The position peaked at $3.39M in Q1 2025. 155 funds tracked by Wall St. Rank hold CTKB as of Q2 2026.

  • CenterBook Partners held 149,180 shares of Cytek Biosciences worth $661K as of Q2 2026.
  • CenterBook Partners sold 580,694 Cytek Biosciences shares in Q2 2026, an estimated $2.48M.
  • Cytek Biosciences made up 0.03% of CenterBook Partners's portfolio in Q2 2026, its #459 holding.
  • CenterBook Partners first reported a position in Cytek Biosciences in Q1 2025 and has held it in 3 quarters since.
  • CenterBook Partners's Cytek Biosciences position peaked at $3.39M in Q1 2025.
  • 155 funds tracked by Wall St. Rank held Cytek Biosciences as of Q2 2026.

Based on CenterBook Partners's 13F filing for Q2 2026, filed 11 Aug 2026.