Citigroup
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Citigroup’s Cytek Biosciences CTKB Stock Holding History

Citigroup’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 		$54.4K Sell
12,454
-9,709
-44% -$45.8K ﹤0.01% 4493
2025
Q4 		$112K Sell
22,163
-27,810
-56% -$129K ﹤0.01% 4271
2025
Q3 		$173K Sell
49,973
-59,670
-54% -$224K ﹤0.01% 4052
2025
Q2 		$373K Sell
109,643
-46,501
-30% -$155K ﹤0.01% 3784
2025
Q1 		$626K Sell
156,144
-4,051
-3% -$21K ﹤0.01% 3554
2024
Q4 		$1.04M Buy
160,195
+18,576
+13% +$111K ﹤0.01% 3338
2024
Q3 		$785K Buy
141,619
+64,563
+84% +$366K ﹤0.01% 3450
2024
Q2 		$430K Buy
77,056
+12,927
+20% +$77.6K ﹤0.01% 3488
2024
Q1 		$430K Buy
64,129
+3,075
+5% +$24.3K ﹤0.01% 3666
2023
Q4 		$557K Buy
61,054
+22,883
+60% +$144K ﹤0.01% 3328
2023
Q3 		$211K Sell
38,171
-31,805
-45% -$255K ﹤0.01% 3638
2023
Q2 		$598K Buy
69,976
+60,074
+607% +$539K ﹤0.01% 3243
2023
Q1 		$91K Buy
9,902
+7,384
+293% +$79.4K ﹤0.01% 4055
2022
Q4 		$25.7K Sell
2,518
-978
-28% -$13.1K ﹤0.01% 4504
2022
Q3 		$52K Sell
3,496
-5,603
-62% -$72.8K ﹤0.01% 4362
2022
Q2 		$97K Buy
9,099
+4,653
+105% +$46.3K ﹤0.01% 4237
2022
Q1 		$48K Buy
4,446
+275
+7% +$3.71K ﹤0.01% 4741
2021
Q4 		$68K Buy
4,171
+1,944
+87% +$40.7K ﹤0.01% 4929
2021
Q3 		$48K Buy
+2,227
New +$52.4K ﹤0.01% 4753

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

Citigroup's CTKB Position: Q1 2026 in Review

Citigroup reduced its Cytek Biosciences (CTKB) stake by 44% in Q1 2026, selling an estimated $45.8K and leaving 12,454 shares worth $54.4K. The position accounts for ﹤0.01% of the portfolio, ranked #4493.

Citigroup first reported a position in CTKB in Q3 2021 and has held it in 19 quarters since. The position peaked at $1.04M in Q4 2024. 165 funds tracked by Wall St. Rank hold CTKB as of Q1 2026.

  • Citigroup held 12,454 shares of Cytek Biosciences worth $54.4K as of Q1 2026.
  • Citigroup sold 9,709 Cytek Biosciences shares in Q1 2026, an estimated $45.8K.
  • Cytek Biosciences made up ﹤0.01% of Citigroup's portfolio in Q1 2026, its #4493 holding.
  • Citigroup first reported a position in Cytek Biosciences in Q3 2021 and has held it in 19 quarters since.
  • Citigroup's Cytek Biosciences position peaked at $1.04M in Q4 2024.
  • 165 funds tracked by Wall St. Rank held Cytek Biosciences as of Q1 2026.

Based on Citigroup's 13F filing for Q1 2026, filed 11 May 2026.