JY
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Jeff Yass’s Castle Biosciences CSTL Stock Holding History

Jeff Yass’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 		– Sell
-9,520
Closed -$234K – 13539
2026
Q1 		$234K Buy
+9,520
New +$312K ﹤0.01% 11401
2025
Q4 		– Sell
-24,225
Closed -$781K – 12530
2025
Q3 		$552K Sell
24,225
-18,628
-43% -$378K ﹤0.01% 8726
2025
Q2 		$875K Buy
42,853
+6,952
+19% +$129K ﹤0.01% 7773
2025
Q1 		$719K Buy
35,901
+18,467
+106% +$457K ﹤0.01% 8084
2024
Q4 		$465K Buy
+17,434
New +$531K ﹤0.01% 8853
2024
Q3 		– Sell
-35,979
Closed -$916K – 12129
2024
Q2 		$783K Buy
+35,979
New +$802K ﹤0.01% 7164
2024
Q1 		– Sell
-26,600
Closed -$579K – 12333
2023
Q4 		$574K Buy
+26,600
New +$468K ﹤0.01% 8313
2023
Q3 		– Sell
-11,551
Closed -$202K – 12131
2023
Q2 		$158K Sell
11,551
-166
-1% -$3.36K ﹤0.01% 10520
2023
Q1 		$266K Buy
+11,717
New +$286K ﹤0.01% 9984
2022
Q1 		– Sell
-10,707
Closed -$442K – 13108
2021
Q4 		$459K Buy
+10,707
New +$559K ﹤0.01% 9435
2021
Q3 		– Sell
-14,477
Closed -$1.02M – 12823
2021
Q2 		$1.06M Sell
14,477
-29,890
-67% -$1.97M ﹤0.01% 7599
2021
Q1 		$3.04M Buy
44,367
+19,783
+80% +$1.49M ﹤0.01% 4921
2020
Q4 		$1.65M Buy
+24,584
New +$1.33M ﹤0.01% 5517
2020
Q3 		– Sell
-11,773
Closed -$524K – 10605
2020
Q2 		$444K Buy
+11,773
New +$402K ﹤0.01% 7618

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
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Allianz Asset Management
Allianz Asset Management Munich, Germany $112B AUM 36.28% 1-Year Est. Return
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

Jeff Yass's CSTL Position: Q2 2026 in Review

Jeff Yass sold out of Castle Biosciences (CSTL) in Q2 2026, closing a stake of 9,520 shares — an estimated $234K sold.

Jeff Yass first reported a position in CSTL in Q2 2020 and held it in 14 quarters. The position peaked at $3.04M in Q1 2021. 175 funds tracked by Wall St. Rank hold CSTL as of Q2 2026.

  • Jeff Yass reported no remaining Castle Biosciences position as of Q2 2026 after selling out during the quarter.
  • Jeff Yass sold 9,520 Castle Biosciences shares in Q2 2026, an estimated $234K.
  • Jeff Yass first reported a position in Castle Biosciences in Q2 2020 and held it in 14 quarters.
  • Jeff Yass's Castle Biosciences position peaked at $3.04M in Q1 2021.
  • 175 funds tracked by Wall St. Rank held Castle Biosciences as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.