CASTLE BIOSCIENCES INC - CSTL
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| May 15, 2026 | SCHEDULE 13G/A | Portolan Capital Management, LLC | 4.45% | 1,350,283 | View |
| May 15, 2026 | SCHEDULE 13G/A | George McCabe | 4.45% | 1,350,283 | View |
| May 15, 2026 | SCHEDULE 13G/A | RTW Investments, LP | 9.3% | 2,758,335 | View |
| May 15, 2026 | SCHEDULE 13G/A | Roderick Wong | 9.3% | 2,758,335 | View |
| Mar 26, 2026 | SCHEDULE 13G/A | The Vanguard Group | 0.0% | 0 | View |
| Feb 17, 2026 | SCHEDULE 13G | RTW Investments, LP | 7.2% | 2,115,237 | View |
| Feb 17, 2026 | SCHEDULE 13G | Roderick Wong | 7.2% | 2,115,237 | View |
| Jan 21, 2026 | SCHEDULE 13G/A | Dimensional Fund Advisors LP | 3.9% | 1,143,799 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.