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, Q4 2024
Institutional positions in Castle Biosciences Inc as of Dec 31, 2024. 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
- 197
- +13 vs. Q3 2024
- Shares held
- 26.5M
- +681.4K (+2.6%) vs. Q3 2024
- Total value
- $706.4M
- −$30.5M (−4.1%) vs. Q3 2024
- New holders
- 40
- 67 more added
- Sold out
- 27
- 65 more reduced
1 institution that held it in Q3 2024 haven't filed for Q4 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2024
Shares, value and share of portfolio for each institution holding Castle Biosciences Inc; share changes are against Q3 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −41,367−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −35,000−100.0% | Sold out |
| Thrivent Financial for Lutherans | 0 | $0 | 0.00% | −23,290−100.0% | Sold out |
| Baader Bank INC | 0 | $0 | 0.00% | −17,300−100.0% | Sold out |
| Deerfield Management Company, L.P. (Series C) | 0 | $0 | 0.00% | −16,943−100.0% | Sold out |
| State of Wisconsin Investment Board | 0 | $0 | 0.00% | −16,823−100.0% | Sold out |
| Winton Group Ltd | 0 | $0 | 0.00% | −16,526−100.0% | Sold out |
| Corton Capital Inc. | 0 | $0 | 0.00% | −11,302−100.0% | Sold out |
| Advantage Alpha Capital Partners LP | 0 | $0 | 0.00% | −10,940−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −10,622−100.0% | Sold out |
| Caxton Associates LP | 0 | $0 | 0.00% | −9,876−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −9,800−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −7,659−100.0% | Sold out |
| State Board of Administration of Florida Retirement System | 0 | $0 | 0.00% | −7,154−100.0% | Sold out |
| Cornerstone Investment Partners, LLC | 0 | $0 | 0.00% | −7,085−100.0% | Sold out |
| Ronald Blue Trust, Inc. | 0 | $0 | 0.00% | −956−100.0% | Sold out |
| Macroview Investment Management LLC | 0 | $0 | 0.00% | −450−100.0% | Sold out |
| Hillsdale Investment Management Inc. | 0 | $0 | 0.00% | −260−100.0% | Sold out |
| Financial Network Wealth Advisors LLC | 0 | $0 | 0.00% | −152−100.0% | Sold out |
| Coastline Trust Co | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Capital Performance Advisors LLP | 0 | $0 | 0.00% | −33−100.0% | Sold out |
| Continuum Advisory, LLC | 0 | $0 | 0.00% | −28−100.0% | Sold out |
| Fairman Group, LLC | 0 | $0 | 0.00% | −13−100.0% | Sold out |
| National Bank of Canada | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Planning Capital Management Corp | – | – | – | – | Not filed |