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

Fidelity 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
Q1 		$1.24M Buy
50,412
+8,126
+19% +$266K ﹤0.01% 2799
2025
Q4 		$1.64M Buy
42,286
+13,744
+48% +$443K ﹤0.01% 2678
2025
Q3 		$650K Buy
28,542
+4,542
+19% +$92.3K ﹤0.01% 2944
2025
Q2 		$490K Buy
24,000
+22,844
+1,976% +$423K ﹤0.01% 2965
2025
Q1 		$23.1K Buy
1,156
+75
+7% +$1.86K ﹤0.01% 4172
2024
Q4 		$28.8K Buy
1,081
+63
+6% +$1.92K ﹤0.01% 4078
2024
Q3 		$29K Sell
1,018
-202
-17% -$5.14K ﹤0.01% 4016
2024
Q2 		$26.6K Buy
1,220
+348
+40% +$7.75K ﹤0.01% 3939
2024
Q1 		$19.3K Sell
872
-73
-8% -$1.59K ﹤0.01% 4032
2023
Q4 		$20.4K Sell
945
-65
-6% -$1.14K ﹤0.01% 3938
2023
Q3 		$17.1K Buy
1,010
+349
+53% +$6.1K ﹤0.01% 3888
2023
Q2 		$9.07K Sell
661
-52
-7% -$1.05K ﹤0.01% 4179
2023
Q1 		$16.2K Sell
713
-61
-8% -$1.49K ﹤0.01% 3932
2022
Q4 		$18.2K Sell
774
-7
-0.9% -$162 ﹤0.01% 3811
2022
Q3 		$20K Buy
781
+224
+40% +$6.28K ﹤0.01% 3851
2022
Q2 		$12K Buy
557
+106
+24% +$2.46K ﹤0.01% 4049
2022
Q1 		$20K Buy
+451
New +$18.6K ﹤0.01% 4009
2021
Q4 		– Sell
-2
Closed – – 4411
2021
Q3 		$0 Sell
2
-2
-50% -$141 ﹤0.01% 4431
2021
Q2 		$0 Sell
4
-335,241
-100% -$22.1M ﹤0.01% 4329
2021
Q1 		$23M Sell
335,245
-247,706
-42% -$18.6M ﹤0.01% 1745
2020
Q4 		$39.1M Buy
582,951
+167,027
+40% +$9.05M ﹤0.01% 1421
2020
Q3 		$21.4M Buy
415,924
+112,456
+37% +$5M ﹤0.01% 1533
2020
Q2 		$11.4M Buy
+303,468
New +$10.4M ﹤0.01% 1767

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

Fidelity Investments's CSTL Position: Q1 2026 in Review

Fidelity Investments increased its Castle Biosciences (CSTL) stake by 19% in Q1 2026, buying an estimated $266K and bringing the position to 50,412 shares worth $1.24M. The position accounts for ﹤0.01% of the portfolio, ranked #2799.

Fidelity Investments first reported a position in CSTL in Q2 2020 and has held it in 23 quarters since. The position peaked at $39.1M in Q4 2020. 186 funds tracked by Wall St. Rank hold CSTL as of Q1 2026.

  • Fidelity Investments held 50,412 shares of Castle Biosciences worth $1.24M as of Q1 2026.
  • Fidelity Investments bought 8,126 Castle Biosciences shares in Q1 2026, an estimated $266K.
  • Castle Biosciences made up ﹤0.01% of Fidelity Investments's portfolio in Q1 2026, its #2799 holding.
  • Fidelity Investments first reported a position in Castle Biosciences in Q2 2020 and has held it in 23 quarters since.
  • Fidelity Investments's Castle Biosciences position peaked at $39.1M in Q4 2020.
  • 186 funds tracked by Wall St. Rank held Castle Biosciences as of Q1 2026.

Based on Fidelity Investments's 13F filing for Q1 2026, filed 15 May 2026.