California State Teachers Retirement System (CalSTRS)
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California State Teachers Retirement System (CalSTRS)’s Cytek Biosciences CTKB Stock Holding History

California State Teachers Retirement System (CalSTRS)’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 		$27.8K Sell
6,362
-875
-12% -$4.13K ﹤0.01% 2328
2025
Q4 		$36.5K Sell
7,237
-1,564
-18% -$7.26K ﹤0.01% 2344
2025
Q3 		$30.5K Sell
8,801
-96,384
-92% -$362K ﹤0.01% 2409
2025
Q2 		$358K Hold
105,185
– – ﹤0.01% 2172
2025
Q1 		$422K Hold
105,185
– – ﹤0.01% 2120
2024
Q4 		$683K Sell
105,185
-1,017
-1% -$6.06K ﹤0.01% 1976
2024
Q3 		$588K Sell
106,202
-3,004
-3% -$17K ﹤0.01% 2047
2024
Q2 		$609K Sell
109,206
-496
-0.5% -$2.98K ﹤0.01% 2003
2024
Q1 		$736K Sell
109,702
-13,474
-11% -$107K ﹤0.01% 1963
2023
Q4 		$1.12M Buy
123,176
+18,538
+18% +$117K ﹤0.01% 1753
2023
Q3 		$578K Sell
104,638
-7,168
-6% -$57.5K ﹤0.01% 2117
2023
Q2 		$955K Buy
111,806
+10,119
+10% +$90.8K ﹤0.01% 1943
2023
Q1 		$935K Sell
101,687
-2,390
-2% -$25.7K ﹤0.01% 1935
2022
Q4 		$1.06M Buy
104,077
+1,195
+1% +$16.1K ﹤0.01% 1855
2022
Q3 		$1.51M Sell
102,882
-3,691
-3% -$47.9K ﹤0.01% 1620
2022
Q2 		$1.14M Buy
106,573
+64,806
+155% +$645K ﹤0.01% 1858
2022
Q1 		$450K Buy
41,767
+33,090
+381% +$447K ﹤0.01% 2434
2021
Q4 		$142K Hold
8,677
– – ﹤0.01% 2901
2021
Q3 		$186K Buy
+8,677
New +$204K ﹤0.01% 2774

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

California State Teachers Retirement System (CalSTRS)'s CTKB Position: Q1 2026 in Review

California State Teachers Retirement System (CalSTRS) reduced its Cytek Biosciences (CTKB) stake by 12% in Q1 2026, selling an estimated $4.13K and leaving 6,362 shares worth $27.8K. The position accounts for ﹤0.01% of the portfolio, ranked #2328.

California State Teachers Retirement System (CalSTRS) first reported a position in CTKB in Q3 2021 and has held it in 19 quarters since. The position peaked at $1.51M in Q3 2022. 165 funds tracked by Wall St. Rank hold CTKB as of Q1 2026.

  • California State Teachers Retirement System (CalSTRS) held 6,362 shares of Cytek Biosciences worth $27.8K as of Q1 2026.
  • California State Teachers Retirement System (CalSTRS) sold 875 Cytek Biosciences shares in Q1 2026, an estimated $4.13K.
  • Cytek Biosciences made up ﹤0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q1 2026, its #2328 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in Cytek Biosciences in Q3 2021 and has held it in 19 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s Cytek Biosciences position peaked at $1.51M in Q3 2022.
  • 165 funds tracked by Wall St. Rank held Cytek Biosciences as of Q1 2026.

Based on California State Teachers Retirement System (CalSTRS)'s 13F filing for Q1 2026, filed 18 May 2026.