Castle Biosciences Inc SEC filings CSTL
Castle Biosciences Inc has 890 filings in SEC EDGAR's recent list, going back to Oct 2, 2008. Its latest annual report, Form ARS, was filed on Apr 8, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (results of operations, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| S-8 | Employee stock plan registration | Feb 26, 2026 | — |
| S-8 | Employee stock plan registration | Nov 3, 2025 | — |
| S-8 | Employee stock plan registration | Feb 27, 2025 | — |
| S-8 | Employee stock plan registration | Feb 28, 2024 | — |
| S-3 | Shelf registration | Feb 28, 2024 | — |
| S-8 | Employee stock plan registration | Dec 4, 2023 | — |
| S-8 | Employee stock plan registration | Mar 1, 2023 | — |
| S-8 | Employee stock plan registration | Feb 28, 2023 | — |
| S-3ASR | Automatic shelf registration | Jun 6, 2022 | — |
| S-8 | Employee stock plan registration | Feb 28, 2022 | — |
| S-3ASR | Automatic shelf registration | Jan 14, 2022 | — |
| S-8 | Employee stock plan registration | Mar 11, 2021 | — |
| 424B5 | Prospectus supplement | Dec 16, 2020 | — |
| 424B5 | Prospectus supplement | Dec 14, 2020 | — |
| S-3ASR | Automatic shelf registration | Dec 14, 2020 | — |
| 424B4 | Prospectus | Jun 25, 2020 | — |
| S-1MEF | Filing | Jun 24, 2020 | — |
| S-1 | Registration statement | Jun 22, 2020 | — |
| S-8 | Employee stock plan registration | Mar 10, 2020 | — |
| S-8 | Employee stock plan registration | Jul 29, 2019 | — |
| 424B4 | Prospectus | Jul 26, 2019 | — |
| S-1MEF | Filing | Jul 24, 2019 | — |
| FWP | Free writing prospectus | Jul 19, 2019 | — |
| S-1/A | Amended registration statement | Jul 19, 2019 | — |
| S-1/A | Amended registration statement | Jul 15, 2019 | — |
| S-1 | Registration statement | Jun 26, 2019 | — |
Showing 26 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Services-Medical Laboratories (SIC 8071)
- Listed as
- CSTL (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Friendswood, TX
- SEC filer status
- Accelerated filer
- SEC CIK
- 1447362
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.