CSTL - NASDAQ
Castle Biosciences, Inc.
$20.39
+3.4%Castle Biosciences, Inc., a commercial-stage diagnostics company, focuses to provide diagnostic and prognostic testing services for dermatological cancers. Its lead product is DecisionDx-Melanoma, a multi-gene expression profile (GEP) test to identify the risk of metastasis for patients diagnosed with invasive cutaneous melanoma. The company also offers DecisionDx-UM test, a proprietary GEP test that predicts the risk of metastasis for patients with uveal melanoma, a rare eye cancer; DecisionDx-SCC, a proprietary 40-gene expression profile test that uses an individual patient's tumor biology to predict individual risk of squamous cell carcinoma metastasis for patients with one or more risk factors; and DecisionDx DiffDx-Melanoma and myPath Melanoma, a proprietary GEP test to diagnose suspicious pigmented lesions. It offers test services through physicians and their patients. The company was founded in 2007 and is headquartered in Friendswood, Texas.
At a Glance
Live SnapshotSEC Filings
CSTL - Filing history and reports
| Filing Type | Filing Date | Period Ending | Fiscal Year | Actions |
|---|---|---|---|---|
8-K 8-K 2026 N/A | May 29, 2026 | May 28, 2026 | 2026 | |
10-Q 10-Q 2026 Q1 Q1 | May 06, 2026 | March 31, 2026 | 2026 | |
8-K 8-K 2026 N/A | May 06, 2026 | May 06, 2026 | 2026 | |
DEF 14A DEF 14A 2026 N/A | April 08, 2026 | May 28, 2026 | 2026 | |
10-K 10-K 2025 FY FY | February 26, 2026 | December 31, 2025 | 2025 | |
8-K 8-K 2026 N/A | February 26, 2026 | February 26, 2026 | 2026 | |
8-K 8-K 2026 N/A | January 13, 2026 | January 11, 2026 | 2026 | |
10-Q 10-Q 2025 Q3 Q3 | November 03, 2025 | September 30, 2025 | 2025 | |
8-K 8-K 2025 N/A | November 03, 2025 | November 03, 2025 | 2025 | |
8-K 8-K 2025 N/A | August 08, 2025 | August 05, 2025 | 2025 |
Understanding SEC Filings
Essential regulatory documents for investors
SEC filings are mandatory documents that publicly traded companies must submit to the Securities and Exchange Commission. These reports provide critical insights into a company's financial health, operations, risks, and strategic direction. For investors conducting due diligence, these filings are the most authoritative source of company information.
Annual Report
Comprehensive annual financial report filed within 60-90 days of fiscal year-end. Includes audited financial statements, management discussion & analysis (MD&A), risk factors, and detailed business operations. The most thorough financial disclosure of the year.
Quarterly Report
Unaudited quarterly financial report filed within 40-45 days after each of the first three fiscal quarters. Provides updates on financial position, results of operations, and significant events. Essential for tracking quarterly performance trends.
Current Report
Event-driven filing for material events that shareholders should know about, filed within 4 business days. Includes acquisitions, executive changes, bankruptcy, earnings releases, and other significant developments. Critical for staying informed about breaking news.
Proxy Statement
Definitive proxy statement sent to shareholders before annual meetings. Contains executive compensation details, board member information, voting matters, and corporate governance policies. Key for understanding management incentives and board composition.
Registration Statement
Initial registration for securities offerings, including IPOs. Provides detailed company history, business model, financial statements, risk factors, and use of proceeds. Essential for evaluating new investment opportunities and understanding company fundamentals.
Foreign Annual Report
Annual report for foreign private issuers, equivalent to Form 10-K for non-U.S. companies. Filed within 4-6 months of fiscal year-end. Contains audited financials, business description, and regulatory disclosures adapted for international companies.
Why SEC Filings Matter
- Regulatory Accuracy: Filings are subject to SEC review and legal penalties for misstatements, ensuring high data quality
- Management Insights: MD&A sections reveal management's perspective on trends, challenges, and future outlook
- Risk Assessment: Detailed risk factor disclosures help investors understand potential threats to business operations
- Competitive Analysis: Business descriptions and segment data enable comparison with industry peers
- Historical Context: Years of filings provide trend analysis and context for current performance
Research Paths
Snapshot
Start with context, operating signals, and key market metrics.
Value Model
Stress test fair value across bear, base, and bull assumptions.
Statements
Validate revenue quality, margins, and balance sheet durability.
Earnings Call
Read management commentary and compare it with reported outcomes.
Dividends
Check payout sustainability and long-term distribution behavior.
Analyst Expectations
Review consensus spread and where estimate risk is concentrated.