Quick Takeaways
- DIMENSIONAL FUND ADVISORS LP filed SCHEDULE 13G/A for Castle Biosciences Inc Common Stock (CSTL).
- Disclosed ownership: 3.9%.
- Date of event: 31 Dec 2025.
DIMENSIONAL FUND ADVISORS LP - 31 Dec 2025 SCHEDULE 13G/A Report for Castle Biosciences Inc Common Stock (CSTL)
- Filing Manager
- DIMENSIONAL FUND ADVISORS LP
- Reporting Manager
- Dimensional Fund Advisors LP
- Security
- Castle Biosciences Inc Common Stock
- Symbol
- CSTL
- Shares outstanding
- 29,328,179 shares
- Disclosed Ownership
- 1,143,799 shares
- Ownership
- 3.9%
- Form type
- SCHEDULE 13G/A
- Filing time
- 21 Jan 2026, 13:21:12 UTC
- Date of event
- 31 Dec 2025
- Previous filing
- 09 Oct 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"DIMENSIONAL FUND ADVISORS LP disclosed 3.9% ownership in Castle Biosciences Inc Common Stock (CSTL) on 31 Dec 2025."
What Changed
- Previous schedule filing date: 09 Oct 2025.
- Current filing was accepted on 21 Jan 2026, 13:21.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Official SEC Source
Backed by Schedule 13D/13G
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
See Original FilingReporting Managers (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Dimensional Fund Advisors LP | 3.9% | 1,143,799 | 1,117,422 | 0 | Selwyn Notelovitz | Global Chief Compliance Officer |