Openbookopenbook
Equity
StockUS listing USCSTLNASDAQHealthcareGrowth Machine

Castle Biosciences Inc(CSTL) Stock Analysis | Healthcare

USD --+0.00%
Reward58Moderate
Risk43Moderate
75%Data
Thin -5% profit margin · Revenue growing 20% YoY
USD —+0.00 (+0.00%) Previous close · NASDAQ
Market cap 1.09Bn
Reward Ratingⓘ58 Moderate reward assessment · 75% data coverage
Top 50% of stocksView factors
Risk Ratingⓘ43 Moderate risk assessment
Risk factors availableUnlock details

Educational tool only – Scores are based on historical data and financial metrics for informational purposes. This is not financial advice or a recommendation to buy or sell any security. Always conduct your own research or consult a qualified financial adviser.

Educational tool only · More
Limited data coverage
We don't have enough public data on CSTL to score it reliably yet — Reward, Risk, Forecasts and Dividends tabs aren't available for this stock. The price chart and basic profile are still shown.
OTC / ADR stock — scores and fundamentals use data tagged in USD by our provider. The issuer may report in a different home currency (e.g. JPY), so treat figures as directional rather than precise.
Not available yet for this stock
The overview tab requires data we don't have for this stock yet. The price chart is the most reliable view we have — try the Chart tab.
Earnings Ex-dividend

Market Performance

Stock returned +10.0% over the past year, broadly in line with market conditions.

What is Castle Biosciences Inc?

, a molecular diagnostics company, provides test solutions for the diagnosis and treatment of dermatologic cancers, Barrett's esophagus (BE), atopic dermatitis (AD), and uveal melanoma.

AI Brief Pro

The brief on Castle Biosciences Inc

The story behind the price, the case for and against, and what could go wrong. Open a part to read it.

What is Castle Biosciences Inc?

, a molecular diagnostics company, provides test solutions for the diagnosis and treatment of dermatologic cancers, Barrett's esophagus (BE), atopic dermatitis (AD), and uveal melanoma. The company offers DecisionDx-Melanoma, a risk stratification gene expression profile (GEP) test that predicts the likelihood of a positive sentinel lymph node and the risk of metastasis for patients with invasive cutaneous melanoma; TissueCypher, a risk stratification spatialomics test to predict future development of high-grade dysplasia and/or esophageal cancer in patients with non-dysplastic, indefinite dysplasia, and low-grade dysplasia BE; AdvanceAD-Tx, a non-invasive GEP test which is designed to guide systemic treatment selection for patients aged 12 years and older with moderateto-severe AD; DecisionDx-SCC, a GEP test for cutaneous squamous cell carcinoma; and MyPath Melanoma, a diagnostic GEP test for use in patients with difficult-to-diagnose melanocytic lesions. The company is listed on the NASDAQ in USA, operating in the Healthcare sector, with a market capitalisation of 1.09B.

Financial Highlights

Investment Breakdown

Growth
Revenue and earnings growing steadily, indicating improving operating performance.
Profitability
Profitability metrics are mixed — margins may be under pressure.
Risk
Risk profile appears balanced versus broad market conditions.
Valuation
Valuation is less clear with a negative earnings base.

OpenBook Logo Analysis

Reward: Moderate (58)

Similar stocks to compare

A short list of Diagnostics & Research names that are close enough in size to make side-by-side comparison useful.

MRCHFSmall Cap / 1.1B market cap
H.U. Group Holdings Inc
Compare
OPKSmall Cap / 1.2B market cap
Opko Health Inc
Compare
BMLKFSmall Cap / 945M market cap
BML, Inc.
Compare
Company Information
SectorHealthcare
IndustryDiagnostics & Research
Market Cap1.09B
P/E RatioN/A
Dividend YieldN/A
Beta0.996
Insider Activity
12M windowBearish
Shares soldShares bought
0-3months
0
0
3-6months
24,172 shares
$105k
0
6-9months
1178,437 shares
$2.2M
0
9-12months
726,698 shares
$1.1M
0
openbook

Stock research for UK and US investors. Make smarter decisions, faster.

Questions? Email us at contact@openbookanalytics.com

© 2026 Openbook Analytics Ltd · Company No. SC843579 · Registered in Scotland

256-bit encryption GDPR compliant UK data centres

Openbook Analytics Ltd (Company No. SC843579) is registered in Scotland. Registered office: Strathclyde Inspire Hub, University of Strathclyde, Graham Hills Building (Level 6), 50 Richmond Street, Glasgow, G1 1XP. Openbook Analytics is not authorised or regulated by the Financial Conduct Authority (FCA). The content on this platform is provided for general informational and educational purposes only and does not constitute financial advice, investment advice, trading advice, or any other form of advice. You should not treat any content on this platform as a recommendation to buy, sell, or hold any financial instrument. Past performance is not a reliable indicator of future results. The value of investments and the income from them can go down as well as up, and you may get back less than you invest. User-generated content, including community posts and commentary, reflects the personal opinions of individual users, is not verified for accuracy, and does not represent the views of Openbook Analytics Ltd. You should always conduct your own research or consult a qualified, FCA-regulated financial adviser before making investment decisions. Data displayed on this platform may be delayed or inaccurate and is provided "as is" without warranty. Openbook Analytics Ltd accepts no liability for any loss arising from reliance on the information provided.