California State Teachers Retirement System (CalSTRS)
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California State Teachers Retirement System (CalSTRS)’s Castle Biosciences CSTL Stock Holding History

California State Teachers Retirement System (CalSTRS)’s Portfolio CSTL Stock Details CSTL Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$902K Buy
37,802
+10,289
+37% +$229K ﹤0.01% 1972
2026
Q1 		$675K Sell
27,513
-212
-0.8% -$6.94K ﹤0.01% 1953
2025
Q4 		$1.08M Buy
27,725
+3,103
+13% +$100K ﹤0.01% 1767
2025
Q3 		$561K Buy
24,622
+2
+0% +$41 ﹤0.01% 2042
2025
Q2 		$503K Hold
24,620
– – ﹤0.01% 2050
2025
Q1 		$493K Hold
24,620
– – ﹤0.01% 2055
2024
Q4 		$656K Sell
24,620
-151
-0.6% -$4.6K ﹤0.01% 1998
2024
Q3 		$706K Sell
24,771
-657
-3% -$16.7K ﹤0.01% 1961
2024
Q2 		$554K Sell
25,428
-56
-0.2% -$1.25K ﹤0.01% 2051
2024
Q1 		$564K Sell
25,484
-1,282
-5% -$27.9K ﹤0.01% 2087
2023
Q4 		$578K Sell
26,766
-1,112
-4% -$19.6K ﹤0.01% 2136
2023
Q3 		$471K Sell
27,878
-2,687
-9% -$47K ﹤0.01% 2229
2023
Q2 		$419K Buy
30,565
+1,765
+6% +$35.8K ﹤0.01% 2385
2023
Q1 		$654K Sell
28,800
-421
-1% -$10.3K ﹤0.01% 2158
2022
Q4 		$688K Buy
29,221
+323
+1% +$7.49K ﹤0.01% 2161
2022
Q3 		$754K Sell
28,898
-160
-0.6% -$4.49K ﹤0.01% 2088
2022
Q2 		$638K Buy
29,058
+2,841
+11% +$66K ﹤0.01% 2250
2022
Q1 		$1.18M Sell
26,217
-2,377
-8% -$98.2K ﹤0.01% 1942
2021
Q4 		$1.23M Buy
28,594
+688
+2% +$36K ﹤0.01% 2033
2021
Q3 		$1.86M Sell
27,906
-1,468
-5% -$103K ﹤0.01% 1766
2021
Q2 		$2.15M Buy
29,374
+7,402
+34% +$489K ﹤0.01% 1725
2021
Q1 		$1.5M Buy
21,972
+4,073
+23% +$306K ﹤0.01% 1896
2020
Q4 		$1.2M Buy
17,899
+149
+0.8% +$8.08K ﹤0.01% 1925
2020
Q3 		$913K Buy
17,750
+2,293
+15% +$102K ﹤0.01% 1916
2020
Q2 		$583K Buy
15,457
+1,053
+7% +$36K ﹤0.01% 2172
2020
Q1 		$429K Buy
14,404
+8,794
+157% +$265K ﹤0.01% 2137
2019
Q4 		$193K Sell
5,610
-147
-3% -$3.59K ﹤0.01% 2796
2019
Q3 		$104K Buy
+5,757
New +$128K ﹤0.01% 2938

Other funds holding CSTL

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RI
RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $204B AUM 27.99% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
Allianz Asset Management
Allianz Asset Management Munich, Germany $123B AUM 45.23% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
SPPAM
Summit Partners Public Asset Management Boston, Massachusetts $5.69B AUM 259.25% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

California State Teachers Retirement System (CalSTRS)'s CSTL Position: Q2 2026 in Review

California State Teachers Retirement System (CalSTRS) increased its Castle Biosciences (CSTL) stake by 37% in Q2 2026, buying an estimated $229K and bringing the position to 37,802 shares worth $902K. The position accounts for ﹤0.01% of the portfolio, ranked #1972.

California State Teachers Retirement System (CalSTRS) first reported a position in CSTL in Q3 2019 and has held it in 28 quarters since. The position peaked at $2.15M in Q2 2021. 177 funds tracked by Wall St. Rank hold CSTL as of Q2 2026.

  • California State Teachers Retirement System (CalSTRS) held 37,802 shares of Castle Biosciences worth $902K as of Q2 2026.
  • California State Teachers Retirement System (CalSTRS) bought 10,289 Castle Biosciences shares in Q2 2026, an estimated $229K.
  • Castle Biosciences made up ﹤0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q2 2026, its #1972 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in Castle Biosciences in Q3 2019 and has held it in 28 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s Castle Biosciences position peaked at $2.15M in Q2 2021.
  • 177 funds tracked by Wall St. Rank held Castle Biosciences as of Q2 2026.

Based on California State Teachers Retirement System (CalSTRS)'s 13F filing for Q2 2026, filed 24 Aug 2026.