Optiver Holding
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Optiver Holding’s Cytek Biosciences CTKB Stock Holding History

Optiver Holding’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
Q1 		$13.9K Buy
+3,175
New +$15K ﹤0.01% 1164
2025
Q4 		– Sell
-1,036
Closed -$3.6K – 2588
2025
Q3 		$3.6K Buy
+1,036
New +$3.89K ﹤0.01% 2050

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

Optiver Holding's CTKB Position: Q1 2026 in Review

Optiver Holding opened a new position in Cytek Biosciences (CTKB) in Q1 2026: 3,175 shares worth $13.9K. The stake represents ﹤0.01% of the portfolio and ranks #1164 among its holdings. This is a return to the name: Optiver Holding previously reported a position in CTKB as recently as Q3 2025.

Optiver Holding first reported a position in CTKB in Q3 2025 and has held it in 2 quarters since. 165 funds tracked by Wall St. Rank hold CTKB as of Q1 2026.

  • Optiver Holding held 3,175 shares of Cytek Biosciences worth $13.9K as of Q1 2026.
  • Cytek Biosciences was a new Optiver Holding position in Q1 2026.
  • Cytek Biosciences made up ﹤0.01% of Optiver Holding's portfolio in Q1 2026, its #1164 holding.
  • Optiver Holding first reported a position in Cytek Biosciences in Q3 2025 and has held it in 2 quarters since.
  • 165 funds tracked by Wall St. Rank held Cytek Biosciences as of Q1 2026.

Based on Optiver Holding's 13F filing for Q1 2026, filed 15 May 2026.