SEI Investments
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SEI Investments’s Castle Biosciences CSTL Stock Holding History

SEI Investments’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 		$1.78M Buy
74,433
+39,387
+112% +$877K ﹤0.01% 2011
2026
Q1 		$860K Sell
35,046
-4,681
-12% -$153K ﹤0.01% 2421
2025
Q4 		$1.55M Buy
39,727
+12,956
+48% +$418K ﹤0.01% 1986
2025
Q3 		$610K Sell
26,771
-4,359
-14% -$88.5K ﹤0.01% 2151
2025
Q2 		$636K Sell
31,130
-41,929
-57% -$776K ﹤0.01% 2085
2025
Q1 		$1.46M Buy
73,059
+31,568
+76% +$782K ﹤0.01% 1760
2024
Q4 		$1.11M Buy
41,491
+3,617
+10% +$110K ﹤0.01% 1902
2024
Q3 		$1.08M Buy
+37,874
New +$964K ﹤0.01% 1921
2023
Q3 		– Sell
-109,995
Closed -$1.51M – 2636
2023
Q2 		$1.51M Buy
109,995
+13,668
+14% +$277K ﹤0.01% 1737
2023
Q1 		$2.19M Buy
+96,327
New +$2.35M ﹤0.01% 1584
2022
Q4 		– Sell
-88,625
Closed -$2.31M – 2561
2022
Q3 		$2.31M Sell
88,625
-17,759
-17% -$498K 0.01% 1478
2022
Q2 		$2.33M Buy
+106,384
New +$2.47M 0.01% 1471
2021
Q4 		– Sell
-9,374
Closed -$624K – 2603
2021
Q3 		$624K Sell
9,374
-1,675
-15% -$118K ﹤0.01% 1970
2021
Q2 		$838K Sell
11,049
-852
-7% -$56.3K ﹤0.01% 1884
2021
Q1 		$816K Buy
11,901
+3,203
+37% +$241K ﹤0.01% 1839
2020
Q4 		$588K Sell
8,698
-8,373
-49% -$454K ﹤0.01% 1910
2020
Q3 		$879K Buy
17,071
+4,199
+33% +$187K ﹤0.01% 1654
2020
Q2 		$485K Sell
12,872
-3,694
-22% -$126K ﹤0.01% 1863
2020
Q1 		$494K Buy
16,566
+8,657
+109% +$261K ﹤0.01% 1743
2019
Q4 		$272K Buy
+7,909
New +$193K ﹤0.01% 2174

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

SEI Investments's CSTL Position: Q2 2026 in Review

SEI Investments increased its Castle Biosciences (CSTL) stake by 112% in Q2 2026, buying an estimated $877K and bringing the position to 74,433 shares worth $1.78M. The position accounts for ﹤0.01% of the portfolio, ranked #2011.

SEI Investments first reported a position in CSTL in Q4 2019 and has held it in 20 quarters since. The position peaked at $2.33M in Q2 2022. 177 funds tracked by Wall St. Rank hold CSTL as of Q2 2026.

  • SEI Investments held 74,433 shares of Castle Biosciences worth $1.78M as of Q2 2026.
  • SEI Investments bought 39,387 Castle Biosciences shares in Q2 2026, an estimated $877K.
  • Castle Biosciences made up ﹤0.01% of SEI Investments's portfolio in Q2 2026, its #2011 holding.
  • SEI Investments first reported a position in Castle Biosciences in Q4 2019 and has held it in 20 quarters since.
  • SEI Investments's Castle Biosciences position peaked at $2.33M in Q2 2022.
  • 177 funds tracked by Wall St. Rank held Castle Biosciences as of Q2 2026.

Based on SEI Investments's 13F filing for Q2 2026, filed 14 Aug 2026.