State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s Cytek Biosciences CTKB Stock Holding History

State of Wisconsin Investment Board’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 		– Sell
-104,046
Closed -$455K – 2573
2026
Q1 		$455K Sell
104,046
-64,517
-38% -$305K ﹤0.01% 2054
2025
Q4 		$851K Sell
168,563
-169,655
-50% -$788K ﹤0.01% 1739
2025
Q3 		$1.17M Buy
338,218
+21,542
+7% +$80.9K ﹤0.01% 1554
2025
Q2 		$1.08M Buy
316,676
+5,351
+2% +$17.8K ﹤0.01% 1542
2025
Q1 		$1.25M Buy
311,325
+51,087
+20% +$265K ﹤0.01% 1412
2024
Q4 		$1.69M Sell
260,238
-12,295
-5% -$73.2K ﹤0.01% 1349
2024
Q3 		$1.51M Sell
272,533
-2,801
-1% -$15.9K ﹤0.01% 1420
2024
Q2 		$1.54M Sell
275,334
-15,474
-5% -$92.9K ﹤0.01% 1408
2024
Q1 		$1.95M Buy
290,808
+10,316
+4% +$81.6K 0.01% 1258
2023
Q4 		$2.56M Buy
280,492
+269,438
+2,437% +$1.7M 0.01% 1180
2023
Q3 		$61K Buy
+11,054
New +$88.7K ﹤0.01% 2410
2022
Q4 		– Sell
-12,568
Closed -$185K – 2533
2022
Q3 		$185K Sell
12,568
-3,623
-22% -$47.1K ﹤0.01% 2420
2022
Q2 		$174K Buy
+16,191
New +$161K ﹤0.01% 2536

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

State of Wisconsin Investment Board's CTKB Position: Q2 2026 in Review

State of Wisconsin Investment Board sold out of Cytek Biosciences (CTKB) in Q2 2026, closing a stake of 104,046 shares — an estimated $455K sold.

State of Wisconsin Investment Board first reported a position in CTKB in Q2 2022 and held it in 13 quarters. The position peaked at $2.56M in Q4 2023. 155 funds tracked by Wall St. Rank hold CTKB as of Q2 2026.

  • State of Wisconsin Investment Board reported no remaining Cytek Biosciences position as of Q2 2026 after selling out during the quarter.
  • State of Wisconsin Investment Board sold 104,046 Cytek Biosciences shares in Q2 2026, an estimated $455K.
  • State of Wisconsin Investment Board first reported a position in Cytek Biosciences in Q2 2022 and held it in 13 quarters.
  • State of Wisconsin Investment Board's Cytek Biosciences position peaked at $2.56M in Q4 2023.
  • 155 funds tracked by Wall St. Rank held Cytek Biosciences as of Q2 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q2 2026, filed 14 Aug 2026.