AllianceBernstein
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AllianceBernstein’s Castle Biosciences CSTL Stock Holding History

AllianceBernstein’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 		$665K Buy
27,100
+1,830
+7% +$40.8K ﹤0.01% 2570
2026
Q1 		$983K Hold
25,270
– – ﹤0.01% 2346
2025
Q4 		$983K Sell
25,270
-8,100
-24% -$261K ﹤0.01% 2350
2025
Q3 		$760K Hold
33,370
– – ﹤0.01% 2469
2025
Q2 		$681K Hold
33,370
– – ﹤0.01% 2485
2025
Q1 		$668K Hold
33,370
– – ﹤0.01% 2428
2024
Q4 		$889K Hold
33,370
– – ﹤0.01% 2387
2024
Q3 		$952K Hold
33,370
– – ﹤0.01% 2350
2024
Q2 		$726K Hold
33,370
– – ﹤0.01% 2464
2024
Q1 		$739K Sell
33,370
-11,320
-25% -$246K ﹤0.01% 2414
2023
Q4 		$964K Hold
44,690
– – ﹤0.01% 2288
2023
Q3 		$755K Hold
44,690
– – ﹤0.01% 2369
2023
Q2 		$613K Buy
44,690
+22,190
+99% +$450K ﹤0.01% 2527
2023
Q1 		$511K Hold
22,500
– – ﹤0.01% 2560
2022
Q4 		$530K Hold
22,500
– – ﹤0.01% 2604
2022
Q3 		$587K Sell
22,500
-21,186
-48% -$594K ﹤0.01% 2566
2022
Q2 		$959K Buy
43,686
+18,886
+76% +$439K ﹤0.01% 2370
2022
Q1 		$1.11M Buy
24,800
+100
+0.4% +$4.13K ﹤0.01% 2389
2021
Q4 		$1.06M Hold
24,700
– – ﹤0.01% 2447
2021
Q3 		$1.64M Sell
24,700
-600
-2% -$42.2K ﹤0.01% 2271
2021
Q2 		$1.85M Buy
25,300
+12,200
+93% +$806K ﹤0.01% 2241
2021
Q1 		$897K Buy
13,100
+2,300
+21% +$173K ﹤0.01% 2456
2020
Q4 		$725K Sell
10,800
-1,900
-15% -$103K ﹤0.01% 2428
2020
Q3 		$653K Sell
12,700
-800
-6% -$35.6K ﹤0.01% 2395
2020
Q2 		$509K Buy
+13,500
New +$461K ﹤0.01% 2594

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

AllianceBernstein's CSTL Position: Q2 2026 in Review

AllianceBernstein increased its Castle Biosciences (CSTL) stake by 7.2% in Q2 2026, buying an estimated $40.8K and bringing the position to 27,100 shares worth $665K. The position accounts for ﹤0.01% of the portfolio, ranked #2570.

AllianceBernstein first reported a position in CSTL in Q2 2020 and has held it in 25 quarters since. The position peaked at $1.85M in Q2 2021. 177 funds tracked by Wall St. Rank hold CSTL as of Q2 2026.

  • AllianceBernstein held 27,100 shares of Castle Biosciences worth $665K as of Q2 2026.
  • AllianceBernstein bought 1,830 Castle Biosciences shares in Q2 2026, an estimated $40.8K.
  • Castle Biosciences made up ﹤0.01% of AllianceBernstein's portfolio in Q2 2026, its #2570 holding.
  • AllianceBernstein first reported a position in Castle Biosciences in Q2 2020 and has held it in 25 quarters since.
  • AllianceBernstein's Castle Biosciences position peaked at $1.85M in Q2 2021.
  • 177 funds tracked by Wall St. Rank held Castle Biosciences as of Q2 2026.

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