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Stock comparison · Signal date 2026-11-06

CSTL vs XGN: stock comparison and AI forecast

Castle Biosciences Inc (CSTL) and Exagen Inc. (XGN) compared on price performance, valuation, profitability and the daily AI forecast. · Alpha · vs market

Share
Nasdaq · Services-Medical Laboratories

CSTL Castle Biosciences Inc

Price
$32.52 +69.0% · 6M
Market Cap
$993M
P/E Ratio
–
Size
small-cap
AI Forecast
Full analysis →
Nasdaq · Services-Medical Laboratories

XGN Exagen Inc.

Price
$7.60 +158.5% · 6M
Market Cap
$184M
P/E Ratio
–
Size
small-cap
AI Forecast
Full analysis →
Model output

Which one does the AI model favor?

Intratio's model scores both stocks every trading day. Sign in to see their current direction; the exact ratings and forecasts come with a plan or a free follow slot.

6M · 2026-05-07 → 2026-11-06

Six-month price performance

Closing prices rebased to 100 at the start of the window.

100150200250300
CSTL +69.0% XGN +158.5%
CSTL · XGN

Key facts

  • CSTL is 5.4 times larger than XGN by market capitalization ($993M against $184M).
  • Over the last six months XGN returned +158.5% and CSTL +69.0%.
  • CSTL turns -6.1% of its revenue into net income, against -26.6% for XGN.
  • XGN carries 3.25 times debt per unit of equity, against 0.21 times for CSTL.
  • Both companies share the SEC industry classification Services-Medical Laboratories.
Fundamentals

Fundamentals side by side

Trailing twelve months.

Valuation & Market

MetricCSTLXGN
Market Cap$993M$184M
P/B Ratio2.08x15.07x
EPS$-0.94$-0.85
Book Value/Share$15.66$0.50
Revenue/Share$12.34$2.94
FCF/Share$0.13$-0.31

Profitability & Margins

MetricCSTLXGN
ROE-4.8%-154.9%
ROA-4.0%-36.4%
ROIC-5.5%-34.3%
Gross Margin77.1%58.6%
Operating Margin-7.4%-18.6%
Net Margin-6.1%-26.6%
EBT Margin-7.4%-18.6%
Tax Rate-1.4%-0.4%

Financial Health

MetricCSTLXGN
Current Ratio5.28x3.18x
Quick Ratio5.12x–
D/E Ratio0.21x3.25x
Financial Leverage1.21x4.25x
Interest Coverage-14.4x-2.0x
Working Capital$289M$29M

Cash Flow

MetricCSTLXGN
Operating Cash Flow$40M-$6M
Free Cash Flow$4M-$8M
Capital Spending-$36M-$1M
OCF Growth YoY-35.7%–
FCF Growth YoY-84.4%–
FCF/Sales1.1%-10.7%
CapEx/Sales9.5%1.5%

Operational Efficiency

MetricCSTLXGN
Asset Turnover0.65x1.37x
Receivables Turnover7.2x5.7x
Inventory Turnover8.3x–
Fixed Assets Turnover3.4x10.8x
Days Sales Outstanding50 days64 days
Days Inventory44 days–
Payables Period56 days55 days
Cash Conversion Cycle38 days–

Income Statement

MetricCSTLXGN
Total Revenue$377M$71M
Operating Income-$28M-$13M
Net Income-$23M-$19M
R&D Expense$58M$6M
SG&A Expense$252M$48M
Cost of Goods Sold$86M$29M

Dividend & Shareholder Information

MetricCSTLXGN
Shares Outstanding31M24M
EPS Growth-280.8%–
FAQ

CSTL vs XGN: stock comparison and AI forecast

Which is bigger, CSTL or XGN?

CSTL is 5.4 times larger than XGN by market capitalization ($993M against $184M).

Which stock performed better over the last six months, CSTL or XGN?

Over the last six months XGN returned +158.5% and CSTL +69.0%.

Which one does Intratio's AI model rank higher, CSTL or XGN?

Intratio's model scores both stocks every trading day. Sign in to see their current direction; the exact ratings and forecasts come with a plan or a free follow slot.

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This analysis is generated automatically using our proprietary AI systems and should not be considered personalized investment advice. Past performance does not guarantee future results. Always conduct your own research and consider consulting a financial advisor before making investment decisions.