CASTLE BIOSCIENCES INC (CSTL)
About CASTLE BIOSCIENCES INC
Castle Biosciences Inc is a molecular diagnostics company. The group provides test solutions for the diagnosis and treatment of dermatologic cancers, Barrett's esophagus (BE), and uveal melanoma. The product portfolio of the company includes DecisionDx-Melanoma, a risk stratification gene expression profile (GEP) test; DecisionDx-SCC, a risk stratification test for cutaneous squamous cell carcinoma; MyPath Melanoma, a diagnostic GEP test for use in patients with difficult-to-diagnose melanocytic lesions; and TissueCypher, a test to predict future development of progression of high-grade dysplasia and/or esophageal cancer. The company derives revenues through the delivery of test reports for its molecular diagnostic tests.
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Financial summary
- Revenue FY2025
- $344.2M
- Net income
- -$24.2M
- Total assets
- $578.6M
- Market cap
- $637.2M
- Gross margin
- 79.4%
- Operating margin
- -12.4%
- Net margin
- -7.0%
Source: SEC EDGAR · updated Jun 7, 2026
Revenue & profit trend
Financial statements
Income statement
- Revenue
- $344.2M
- Cost of revenue
- $71.0M
- Gross profit
- $273.2M
- Operating expenses
- $316.0M
- Operating income
- -$42.8M
- Income tax
- -$5.4M
- Net income
- -$24.2M
- EPS (basic)
- $-0.83
- EPS (diluted)
- $-0.83
Balance sheet
- Total assets
- $578.6M
- Current assets
- $361.1M
- Total liabilities
- $107.7M
- Current liabilities
- $68.7M
- Shareholders’ equity
- $470.9M
Cash flow
- Operating cash flow
- $64.3M
- Investing cash flow
- -$60.4M
- Financing cash flow
- -$7.0M
- Net cash flow
- -$3.0M
Statements via Polygon.io (SEC filings)
15-minute delayed · data by Polygon.io
Past year · hover for prices
52-week range
- Market cap
- $637.2M
- EPS (diluted)
- $-0.83
- Shares outstanding
- 25.8M
- Open
- —
- Day range
- –
- Prev close
- —
- Volume
- —
- IPO date
- Jul 25, 2019
Castle Biosciences Inc (CSTL) Stock Price
- Reported a net loss of $24.2M in FY2025.
- Revenue grew 449% from FY2020 to FY2025.
- Gross margin of 79.4%, net margin -7.0%.
- Trading 43% below its 52-week high.
Automatically generated from public filings and market data. Informational only — not investment advice or a recommendation to buy or sell any security.
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Castle Biosciences Inc: frequently asked questions
Is Castle Biosciences Inc an American company?
Castle Biosciences Inc is a US-based company headquartered in Friendswood, Texas, listed in the americancompanies.com directory of American companies. Its American-origin credentials have not yet been independently verified.
Where is Castle Biosciences Inc headquartered?
Castle Biosciences Inc is headquartered in Friendswood, Texas, United States.
Is Castle Biosciences Inc publicly traded?
Yes — Castle Biosciences Inc is a publicly traded company. Its stock trades under the ticker symbol CSTL on the NASDAQ.
What does Castle Biosciences Inc do?
Castle Biosciences Inc is an American Medical Devices company in the Health & Beauty sector.
