CSTL CASTLE BIOSCIENCES INCcompanySEC Filings & Insider Trading Activity 2026
Latest CASTLE BIOSCIENCES INC (CSTL) SEC EDGAR filings in 2026 — including the most recent 10-K annual report filed on February 26, 2026, a 10-Q quarterly report filed on November 3, 2025, an 8-K current report filed on February 26, 2026. SignalX aggregates every new 10-K annual report, 10-Q quarterly report, 8-K current report, and Form 4 insider transaction for CASTLE BIOSCIENCES INC (CSTL) (SEC CIK 1447362), with AI-powered section-by-section summaries updated daily.
Latest 2026 SEC Filing Dates
AI 8-K Current Report AnalysisRecent 8-K Filings
Item 2.02: Results of Operations and Financial Condition
- • Q4 and full-year 2025 results announced Feb 26, 2026; details in Exhibit 99.1
- • Filing covers period ending Dec 31, 2025 — no financials disclosed in 8-K body itself
Item 7.01: Regulation FD Disclosure
- • Investor slide presentation published Feb 26, 2026, available as Exhibit 99.2
- • Management may reference these slides in future investor/analyst meetings, signaling ongoing strategic messaging
Recent 8-K FilingsCurrent Reports
AI-powered analysis of CASTLE BIOSCIENCES INC (CSTL) 8-K current reports disclosing material events.
Latest 2026 SEC Filings — 10-K, 10-Q, 8-K & Form 4
| Form | Filing Date | Period | Analysis | SEC |
|---|---|---|---|---|
8-K | Feb 26, 2026 | — | Analysis | — |
10-K | Feb 26, 2026 | Dec 31, 2025 | — | |
8-K | Jan 13, 2026 | — | — | |
10-Q | Nov 3, 2025 | Sep 30, 2025 | — | |
10-Q | Aug 4, 2025 | Jun 30, 2025 | — | |
10-Q | May 5, 2025 | Mar 31, 2025 | — | |
10-K | Feb 27, 2025 | Dec 31, 2024 | — | |
10-Q | Nov 4, 2024 | Sep 30, 2024 | — | |
10-Q | Aug 5, 2024 | Jun 30, 2024 | — | |
10-Q | May 2, 2024 | Mar 31, 2024 | — | |
10-K | Feb 28, 2024 | Dec 31, 2023 | — | |
10-Q | Nov 2, 2023 | Sep 30, 2023 | — | |
10-Q | Aug 2, 2023 | Jun 30, 2023 | — | |
10-Q | May 3, 2023 | Mar 31, 2023 | — | |
10-K | Feb 28, 2023 | Dec 31, 2022 | — | |
10-Q | Nov 2, 2022 | Sep 30, 2022 | — | |
10-Q | Aug 8, 2022 | Jun 30, 2022 | — | |
10-Q | May 9, 2022 | Mar 31, 2022 | — | |
10-K | Feb 28, 2022 | Dec 31, 2021 | — | |
10-Q | Nov 8, 2021 | Sep 30, 2021 | — | |
10-Q | Aug 9, 2021 | Jun 30, 2021 | — | |
10-Q | May 10, 2021 | Mar 31, 2021 | — | |
10-K | Mar 11, 2021 | Dec 31, 2020 | — | |
10-Q | Nov 9, 2020 | Sep 30, 2020 | — | |
10-Q | Aug 10, 2020 | Jun 30, 2020 | — |
Frequently Asked Questions
What are the latest CSTL SEC filings in 2026?
CASTLE BIOSCIENCES INC (CSTL) has filed a 10-K annual report on February 26, 2026, a 10-Q quarterly report on November 3, 2025, an 8-K current report on February 26, 2026 with the SEC. SignalX tracks every new SEC EDGAR filing daily, including 10-K, 10-Q, 8-K, and Form 4 insider transactions, with AI-powered summaries of key sections.
When did CSTL file its most recent 10-K annual report?
CASTLE BIOSCIENCES INC (CSTL) filed its most recent 10-K annual report on February 26, 2026. The 10-K includes audited financial statements, business overview, risk factors, and management discussion, all available on SignalX with AI-generated summaries and XBRL financial data.
How do I view CSTL 10-Q quarterly reports?
CASTLE BIOSCIENCES INC (CSTL)'s most recent 10-Q quarterly report was filed on November 3, 2025. SignalX displays every CSTL 10-Q with AI-generated summaries of the MD&A (Management Discussion & Analysis) and Risk Factors sections, plus links to the original SEC EDGAR document.
What 8-K current reports has CSTL filed recently?
CASTLE BIOSCIENCES INC (CSTL)'s most recent 8-K was filed on February 26, 2026. 8-K filings disclose material corporate events such as earnings releases, executive changes, mergers, and other significant developments. SignalX surfaces each 8-K with item-level summaries so you can quickly see what happened.
Where can I find CSTL insider trading activity (Form 4)?
SignalX aggregates every CSTL Form 4 insider transaction from SEC EDGAR. Form 4 reports show when officers, directors, and 10% shareholders buy or sell company stock, with transaction code, share count, and price per share.
How often does CSTL file with the SEC?
CASTLE BIOSCIENCES INC (CSTL) files a 10-K annual report once per year (typically within 60 days of fiscal year-end) and 10-Q quarterly reports three times per year. 8-K current reports are filed as needed when material events occur, and Form 4 insider transaction reports are due within two business days of a trade. SignalX monitors SEC EDGAR daily to surface every new CSTL filing with AI-powered analysis.
What is the difference between 10-K, 10-Q, and 8-K SEC filings?
A 10-K is a comprehensive annual report with audited financials, business overview, and risk factors. A 10-Q is a shorter quarterly report with unaudited financials and management discussion. An 8-K is a current report filed when a material event occurs — such as earnings releases, executive changes, acquisitions, or other significant developments. SignalX provides AI-generated summaries for all three filing types for CASTLE BIOSCIENCES INC (CSTL).
What is CSTL's SEC CIK number?
CASTLE BIOSCIENCES INC (CSTL)'s SEC CIK (Central Index Key) number is 1447362. The CIK is a unique identifier assigned by the SEC to every filing entity. You can use CIK 1447362 to look up all CSTL filings on SEC EDGAR, or browse them here on SignalX with AI-powered analysis.
Where can I find CSTL return on equity (ROE) and financial data?
SignalX extracts XBRL financial data from CASTLE BIOSCIENCES INC (CSTL) 10-K annual filings, including revenue, net income, gross profit, operating income, EPS, total assets, stockholders' equity, and operating cash flow. Return on equity (ROE) can be derived from net income divided by stockholders' equity. Multi-year financial trends are displayed in the Financial Summary table above.
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