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Castle Biosciences Inc

CSTL
Exchange
Nasdaq
Industry
Services-Medical Laboratories
SEC CIK
0001447362

In the last 90 days, Castle Biosciences Inc insiders filed 0 open-market purchases and 21 sales; 176 institutions reported holding it in 13F filings for Q2 2026, worth $653.8M in total; no superinvestor holds it.

Q2 2025 vs. Q1 2025

How the institutions holding Castle Biosciences Inc changed between Q1 2025 and Q2 2025.

All holders in Q2 2025All holders in Q1 2025

13F holders of CSTL: Q1 2025 compared with Q2 2025
MeasureQ1 2025Of which not filed for Q2 2025Q2 2025Change
Holders1802152−26
Shares25.9M78.6K26.5M+744.7K (+2.9%)
Value$516.3M$1.57M$541.8M+$27.1M (+5.3%)

2 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (16)

Institutions that held Castle Biosciences Inc at the end of Q2 2025 but not at the end of Q1 2025.

Institutions new to CSTL in Q2 2025
InstitutionSharesValue% of portfolio
Y-Intercept (Hong Kong) Ltd78,938$1.61M0.04%
Bridgeway Capital Management, LLC40,750$832.1K0.02%
Empowered Funds, LLC40,750$832.1K0.01%
Jump Financial, LLC21,858$446.3K0.01%
Aquatic Capital Management LLC19,280$393.7K0.01%
Manufacturers Life Insurance Company, The10,316$210.7K0.00%
Mount Yale Investment Advisors, LLC8,362$170.8K0.01%
Global Retirement Partners, LLC1,163$23.7K0.00%
Raymond James Financial Inc662$13.5K0.00%
BNP PARIBAS ASSET MANAGEMENT Holding S.A.428$9.00K0.00%
Versant Capital Management, Inc126$2.57K0.00%
IFP Advisors, Inc36$1.27K0.00%
Signaturefd, LLC45$9190.00%
Allworth Financial LP5$1030.00%
Stephens Consulting, LLC2$410.00%
Twin Peaks Wealth Advisors, LLC1$190.00%

Sold out (42)

Institutions that held Castle Biosciences Inc at the end of Q1 2025 and filed for Q2 2025 without it.

Institutions that sold out of CSTL in Q2 2025
InstitutionShares, Q1 2025Value, Q1 2025
Park West Asset Management LLC556,485$11.1M
Bellevue Group AG301,103$6.03M
Cubist Systematic Strategies, LLC237,698$4.76M
Point72 Asset Management, L.P.236,218$4.73M
Shelton Capital Management164,008$3.28M
ExodusPoint Capital Management, LP77,563$1.55M
Gsa Capital Partners LLP67,143$1.34M
Jackson Creek Investment Advisors LLC57,094$1.14M
Dark Forest Capital Management LP51,855$1.04M
Campbell & CO Investment Adviser LLC45,849$917.9K
ABG Innovation Capital Partners III GP Ltd36,747$735.7K
Los Angeles Capital Management LLC33,970$680.1K
Jane Street Group, LLC30,676$614.1K
TownSquare Capital, LLC23,772$475.9K
Fan Yu22,503$450.5K
Jacobs Levy Equity Management, Inc21,299$426.4K
Dynamic Technology Lab Private Ltd21,235$425.0K
Cerity Partners LLC21,138$423.2K
Hussman Strategic Advisors, Inc.21,000$420.4K
EntryPoint Capital, LLC20,432$409.0K
Balyasny Asset Management LLC19,730$395.0K
Sherbrooke Park Advisers LLC19,439$389.2K
Centiva Capital, LP16,802$336.4K
Caxton Associates LLP16,440$329.1K
Quantbot Technologies LP15,287$306.0K
Man Group plc14,514$290.6K
Mach-1 Financial Group, Inc.13,313$266.5K
Winton Group Ltd12,869$257.6K
Corebridge Financial, Inc.12,866$257.6K
Magnetar Financial LLC11,226$224.7K
Teacher Retirement System of Texas10,383$207.9K
Amundi4,137$79.4K
C M Bidwell & Associates Ltd3,180$63.7K
Canada Pension Plan Investment Board2,400$48.0K
Point72 (DIFC) Ltd1,773$35.5K
Arcadia Investment Management Corp904$18.1K
Coldstream Capital Management Inc342$6.85K
True Wealth Design, LLC201$4.03K
Massmutual Trust Co FSB51$1.02K
Simplex Trading, LLC97$1.00K
Steward Partners Investment Advisory, LLC31$621
US Bancorp24$480

Not filed for Q2 2025 yet (2)

Institutions that held Castle Biosciences Inc at the end of Q1 2025 and haven't filed a 13F for Q2 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding CSTL in Q1 2025 that haven't filed for Q2 2025
InstitutionShares, Q1 2025Value, Q1 2025
Orion Portfolio Solutions, LLC78,409$1.57M
Lindbrook Capital, LLC179$3.58K