Group One Trading
CSTL icon

Group One Trading’s Castle Biosciences CSTL Stock Holding History

Group One Trading’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
-5,300
Closed -$130K – 7721
2026
Q1 		$130K Buy
+5,300
New +$174K ﹤0.01% 4483
2025
Q2 		– Sell
-500
Closed -$10K – 8022
2025
Q1 		$10K Sell
500
-600
-55% -$14.9K ﹤0.01% 6262
2024
Q4 		$29.3K Buy
1,100
+900
+450% +$27.4K ﹤0.01% 5447
2024
Q3 		$5.7K Buy
+200
New +$5.09K ﹤0.01% 5827

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

Group One Trading's CSTL Position: Q2 2026 in Review

Group One Trading sold out of Castle Biosciences (CSTL) in Q2 2026, closing a stake of 292 shares — an estimated $7.17K sold.

Group One Trading first reported a position in CSTL in Q3 2021 and held it in 9 quarters. The position peaked at $261K in Q4 2024. 177 funds tracked by Wall St. Rank hold CSTL as of Q2 2026.

  • Group One Trading reported no remaining Castle Biosciences position as of Q2 2026 after selling out during the quarter.
  • Group One Trading sold 292 Castle Biosciences shares in Q2 2026, an estimated $7.17K.
  • Group One Trading first reported a position in Castle Biosciences in Q3 2021 and held it in 9 quarters.
  • Group One Trading's Castle Biosciences position peaked at $261K in Q4 2024.
  • 177 funds tracked by Wall St. Rank held Castle Biosciences as of Q2 2026.

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