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 20 sales; 176 institutions reported holding it in 13F filings for Q2 2026, worth $653.8M in total; no superinvestor holds it.
13F holders, Q1 2025
Institutional positions in Castle Biosciences Inc as of Mar 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 180
- −14 vs. Q4 2024
- Shares held
- 25.9M
- −168.1K (−0.6%) vs. Q4 2024
- Total value
- $516.3M
- −$177.7M (−25.6%) vs. Q4 2024
- New holders
- 30
- 76 more added
- Sold out
- 44
- 54 more reduced
3 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting CSTL on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 176 | $653.8M |
| Q1 2026 | 186 | $677.8M |
| Q4 2025 | 195 | $1.06B |
| Q3 2025 | 173 | $608.3M |
| Q2 2025 | 152 | $541.8M |
| Q1 2025 | 180 | $516.3M |
| Q4 2024 | 197 | $706.4M |
| Q3 2024 | 185 | $736.9M |
| Q2 2024 | 159 | $549.4M |
| Q1 2024 | 151 | $553.2M |
| Q4 2023 | 153 | $515.4M |
| Q3 2023 | 135 | $391.0M |
| Q2 2023 | 130 | $316.6M |
| Q1 2023 | 148 | $501.9M |
| Q4 2022 | 153 | $522.0M |
| Q3 2022 | 157 | $569.8M |
| Q2 2022 | 146 | $495.0M |
| Q1 2022 | 160 | $1.02B |
| Q4 2021 | 159 | $918.6M |
| Q3 2021 | 188 | $1.42B |
| Q2 2021 | 182 | $1.52B |
| Q1 2021 | 175 | $1.46B |
Institutions, Q1 2025
Shares, value and share of portfolio for each institution holding Castle Biosciences Inc; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Bailard, Inc. | 0 | $0 | 0.00% | −9,900−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −9,796−100.0% | Sold out |
| Manufacturers Life Insurance Company, The | 0 | $0 | 0.00% | −9,467−100.0% | Sold out |
| Green Alpha Advisors, LLC | 0 | $0 | 0.00% | −9,327−100.0% | Sold out |
| RSM US Wealth Management LLC | 0 | $0 | 0.00% | −9,155−100.0% | Sold out |
| Petrus Trust Company, LTA | 0 | $0 | 0.00% | −9,151−100.0% | Sold out |
| Janus Henderson Group PLC | 0 | $0 | 0.00% | −9,137−100.0% | Sold out |
| Cambridge Investment Research Advisors, Inc. | 0 | $0 | 0.00% | −9,102−100.0% | Sold out |
| ProShare Advisors LLC | 0 | $0 | 0.00% | −8,613−100.0% | Sold out |
| Voya Investment Management LLC | 0 | $0 | 0.00% | −7,876−100.0% | Sold out |
| Arizona State Retirement System | 0 | $0 | 0.00% | −7,599−100.0% | Sold out |
| RiverPark Advisors, LLC | 0 | $0 | 0.00% | −3,170−100.0% | Sold out |
| Coppell Advisory Solutions LLC | 0 | $0 | 0.00% | −1,924−100.0% | Sold out |
| R Squared Ltd | 0 | $0 | 0.00% | −1,590−100.0% | Sold out |
| MCF Advisors LLC | 0 | $0 | 0.00% | −258−100.0% | Sold out |
| GWM Advisors LLC | 0 | $0 | 0.00% | −247−100.0% | Sold out |
| Comerica Bank | 0 | $0 | 0.00% | −207−100.0% | Sold out |
| IFP Advisors, Inc | 0 | $0 | 0.00% | −161−100.0% | Sold out |
| Federated Hermes, Inc. | 0 | $0 | 0.00% | −114−100.0% | Sold out |
| CIBC Private Wealth Group, LLC | 0 | $0 | 0.00% | −52−100.0% | Sold out |
| SRS Capital Advisors, Inc. | 0 | $0 | 0.00% | −31−100.0% | Sold out |
| Larson Financial Group LLC | 0 | $0 | 0.00% | −12−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −9−100.0% | Sold out |
| Nelson, Van Denburg & Campbell Wealth Management Group, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Nuveen Asset Management, LLC | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |
| Hanseatic Management Services Inc | – | – | – | – | Not filed |