Castle Biosciences, Inc. (CSTL) Stock

Castle Biosciences, Inc. (CSTL) is a Healthcare stock trading at $21.12 (as of 2026-06-18), with a market capitalization of $639.36M and a trailing P/E of -49.3. Figures are sourced from first-party U.S. SEC EDGAR filings and market data.

Castle Biosciences, Inc. is a diagnostics company offering prognostic and diagnostic testing services using gene expression profile assays for cancers including invasive cutaneous melanoma, uveal melanoma, and squamous cell carcinoma. Its tests are provided through physicians for use with their patients.

Valuation — source: SEC EDGAR (first-party)
Price$21.12
Market Cap$639.36M
P/E Ratio-49.3
EV / EBITDA-31.3
Price / Book1.36
Price / Sales1.85
DCF Value (model)$19.81
DCF Upside vs Price-6.2%
Profitability & Growth — source: SEC EDGAR
Revenue (TTM)$344.23M
Net Margin-7.0%
Return on Equity-2.8%
Debt / Equity0.02
Current Ratio6.75
Revenue Growth (YoY)3.7%
EPS Growth (YoY)-225.8%
FCF Growth (YoY)-22.5%
Financial Health — source: SEC EDGAR
Altman Z-Score3.91 (safe)
Piotroski F-Score3/9 (weak)
Valuation vs Sector & Industry
Stock P/E-49.3
Sector P/E (Healthcare)21.0
Industry P/E (Healthcare Services)23.0
vs Sector-335.1%
vs Industry-314.0%
Smart-Money Activity — SEC Form 4 / 13F / Congressional disclosures
Top Institutional HolderVANGUARD GROUP INC ($85.57M)
Institutional Holders Tracked10
Congressional Trades (recent)3
Company
SectorHealthcare
IndustryHealthcare Services
CEODerek J. Maetzold
Employees784
CountryUS
IPO Date2019-07-25

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CSTL earnings history · CSTL institutional & insider holders · Congress trades · Insider trades · Short interest · Stock screener

Data as of 2026-06-18.

Figures sourced from U.S. Securities and Exchange Commission (SEC EDGAR) filings and market data. Not personalized investment advice.