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
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 $5.72T AUM 30.48% 1-Year Est. Return
RI
RTW Investments New York $10B AUM 135.35% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $187B AUM 18.48% 1-Year Est. Return
PCM
Portolan Capital Management Boston, Massachusetts $1.88B AUM 115.74% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
SPPAM
Summit Partners Public Asset Management Boston, Massachusetts $3.72B AUM 162.29% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Allianz Asset Management
Allianz Asset Management Munich, Germany $95.4B AUM 38.74% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

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

California State Teachers Retirement System (CalSTRS) reduced its Castle Biosciences (CSTL) stake by 0.76% in Q1 2026, selling an estimated $6.94K and leaving 27,513 shares worth $675K. The position accounts for ﹤0.01% of the portfolio, ranked #1953.

California State Teachers Retirement System (CalSTRS) first reported a position in CSTL in Q3 2019 and has held it in 27 quarters since. The position peaked at $2.15M in Q2 2021. 186 funds tracked by Wall St. Rank hold CSTL as of Q1 2026.

  • California State Teachers Retirement System (CalSTRS) held 27,513 shares of Castle Biosciences worth $675K as of Q1 2026.
  • California State Teachers Retirement System (CalSTRS) sold 212 Castle Biosciences shares in Q1 2026, an estimated $6.94K.
  • Castle Biosciences made up ﹤0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q1 2026, its #1953 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in Castle Biosciences in Q3 2019 and has held it in 27 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s Castle Biosciences position peaked at $2.15M in Q2 2021.
  • 186 funds tracked by Wall St. Rank held Castle Biosciences as of Q1 2026.

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