CSTL vs CAI vs BLLN Stock Comparison

Castle Biosciences, Caris Life Sciences and BillionToOne Prices as of Nov 4, 2026 Peers: Industry group
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CSTL Castle Biosciences Inc
$35.75 -2.5% 1M +13.0% 1Y
Market cap
$1.09B
P/E
–
Revenue (TTM)
$357.28M
Div. yield
–
Diagnostic Labs Healthcare
2 wins
BLLN BillionToOne, Inc.
$113.89 +4.4% 1M
Market cap
$5.42B
P/E
117.2x
Revenue (TTM)
$436.87M
Div. yield
–
Diagnostic Labs Healthcare
4 wins

Head to Head

10 decided of 12

Caris Life Sciences leads on 4 of the 12 questions below (Caris Life Sciences 4, BillionToOne 4, Castle Biosciences 2). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionCSTLCAIBLLNLeader
Larger companyMarket capitalisation $1.09B $9.52B $5.42B CAI
Cheaper on earningsLower P/E, profitable companies only -56.0x 98.2x 117.2x CAI
Cheaper on forward earningsLower price / next fiscal year consensus EPS — 302.0x 149.9x BLLN
Faster revenue growthRevenue growth, trailing twelve months +3.2% +61.5% +71.9% BLLN
More profitableNet margin, trailing twelve months -5.4% 9.2% 10.5% BLLN
Better return on capitalReturn on invested capital -6.7% 13.7% 6.9% CAI
Less leveragedLower net debt / EBITDA 15.5x -2.3x -9.1x BLLN
Higher dividend yieldTrailing dividend yield — 0.00% — –
Better 1-year returnPrice return, last 12 months +13.0% +6.5% — CSTL
Better 5-year returnAnnualised price return, 5 years -9.7%/yr — — –
Less volatileAnnualised volatility, 1 year 55.6% 69.8% 93.4% CSTL
Higher overall scoreMean of the five percentile scores vs peers 49/100 65/100 57/100 CAI

Percentile Scorecard

CSTLCAIBLLN

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisCSTLCAIBLLN
Valuation 45 #53 of 95 22 #74 of 95 21 #75 of 95
Growth 47 #47 of 88 99 #2 of 88 100 #1 of 88
Profitability 38 #54 of 87 71 #26 of 87 58 #37 of 87
Financial Health 91 #10 of 100 79 #22 of 100 98 #3 of 100
Shareholder Returns 23 #45 of 58 56 #26 of 58 7 #54 of 58
Overall 49 65 57
  • CSTL ranked among 102 companies in Healthcare Providers
  • CAI ranked among 102 companies in Healthcare Providers
  • BLLN ranked among 102 companies in Healthcare Providers

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodCSTLCAIBLLNSPY
1 month -2.5%+9.3%+4.4% -1.0%
3 months +17.6%+101.9%-24.1% -0.4%
6 months +44.4%+73.7%+39.9% +4.5%
Year to date -8.1%+23.1%+39.2% +12.4%
1 year +13.0%+6.5%— +13.6%
3 years +98.8%—— +76.4%
3 years, per year +25.8%—— +20.8%
5 years -40.0%—— +63.7%
5 years, per year -9.7%—— +10.4%

Risk

MeasureCSTLCAIBLLNSPY
Volatility, 1Y 55.6%69.8%93.4% 12.8%
Downside volatility, 1Y 61.9%70.3%106.5% 12.7%
Beta vs S&P 500, 1Y 1.171.551.65 1.00
Return / volatility, 1Y 0.230.09— 1.06
Max drawdown, 5Y -81.0%-63.0%-50.8% -25.4%
From 52-week high -16.9%-8.1%-24.1% -1.6%
52-week high $43.04$36.14$149.97 $779.14
52-week low $18.15$14.55$64.03 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleCSTLCAIBLLN
P/E now vs peer median -56.0xmedian 25.6x 98.2xmedian 25.6x 117.2xmedian 25.6x
P/S now vs peer median 3.1xmedian 1.6x 9.1xmedian 1.6x 12.4xmedian 1.6x
EV/EBITDA now vs peer median -50.5xmedian 16.0x 55.0xmedian 16.0x 95.4xmedian 16.0x
P/FCF now vs peer median -2,230xmedian 21.6x 329.5xmedian 21.6x 160.0xmedian 21.6x
P/B now vs peer median 2.3xmedian 3.4x 14.9xmedian 3.4x 9.6xmedian 3.4x
PEG now vs peer median -1.32median 0.74 —median 0.74 —median 0.74

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsCSTLCAIBLLN
Revenue $357.28M $1.05B $436.87M
Gross profit $276.03M $724.14M $311.95M
Operating income -$32.11M $139.94M $44.69M
Net income -$19.42M $96.06M $49.39M
Free cash flow -$489.00K $28.91M $33.91M
R&D $55.45M $129.36M $66.47M
EPS (diluted) $-0.64 $0.33 $0.86
Cash & equivalents $62.12M $665.32M $561.51M
Total debt $10.08M $393.27M $89.00M
Shares (diluted) 30.40M 295.14M 53.73M
Enterprise value -$24.96M $6.34B $3.28B

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricCSTLCAIBLLN
P/E -56.0x 98.2x 117.2x
P/FCF -2,230x 329.5x 160.0x
P/Operating cash flow 25.6x 113.5x 113.2x
P/S 3.1x 9.1x 12.4x
P/B 2.3x 14.9x 9.6x
P/Tangible book 2.3x 14.9x 9.6x
EV/EBITDA -50.5x 55.0x 95.4x
EV/EBIT -26.0x 65.4x 110.8x
EV/Revenue 2.3x 8.7x 11.3x
EV/FCF -1,705x 316.5x 146.1x
EV/Operating cash flow 19.6x 109.1x 103.4x
PEG (3Y EPS CAGR) -1.32 – –

Growth

14 metrics
MetricCSTLCAIBLLN
Revenue growth (1Y) 3.2% 61.5% 71.9%
Revenue CAGR (3Y) 28.7% – –
Gross profit growth (1Y) -1.6% 86.2% 88.4%
Gross profit CAGR (3Y) 29.2% – –
Operating income growth (1Y) -39.3% 274.2% 844.7%
Operating income CAGR (3Y) 30.8% – –
Net income growth (1Y) -105.1% 151.4% 593.9%
Net income CAGR (3Y) 39.8% – –
EPS growth (1Y) -99.3% 114.2% 193.7%
EPS CAGR (3Y) 42.3% – –
Operating cash flow growth (1Y) -31.8% 15,464% 794.7%
Operating cash flow CAGR (3Y) 45.1% – –
Free cash flow growth (1Y) -101.4% 306.4% 934.5%
Free cash flow CAGR (3Y) 78.8% – –

Profitability

14 metrics
MetricCSTLCAIBLLN
Gross margin 77.3% 69.1% 71.4%
EBITDA margin -4.6% 15.9% 11.9%
Operating margin -9.0% 13.4% 10.2%
Pretax margin -5.4% 9.3% 11.4%
Net margin -5.4% 9.2% 10.5%
FCF margin -0.1% 2.8% 7.8%
Operating cash flow margin 11.9% 8.0% 11.0%
Return on equity -4.2% 15.6% 9.0%
Return on assets -3.5% 7.7% 6.6%
Return on invested capital -6.7% 13.7% 6.9%
Return on capital employed -6.4% 12.9% 6.5%
Asset turnover 0.6x 0.8x 0.6x
Cash conversion (OCF / net income) -2.2x 0.9x 1.0x
Stock comp / revenue 12.6% 6.7% 7.0%

Financial Health

11 metrics
MetricCSTLCAIBLLN
Debt / assets 1.8% 31.3% 11.7%
Debt / equity 0.0x 0.6x 0.2x
Net debt / EBITDA 15.5x -2.3x -9.1x
Debt / FCF -20.6x 13.6x 2.6x
Liabilities / assets 16.2% 49.1% 25.5%
Equity / assets 83.8% 50.9% 74.5%
Interest coverage -85.6x 3.3x 1,655x
Current ratio 6.0x 6.7x 11.2x
Quick ratio 5.6x 5.7x 10.7x
Cash ratio 4.7x 4.8x 9.3x
Altman Z-score 7.64 8.52 18.11

Shareholder Returns

7 metrics
MetricCSTLCAIBLLN
Dividend yield – – –
Net buyback yield -0.5% 0.0% -5.6%
Shareholder yield -0.5% 0.0% -5.6%
Payout ratio (earnings) – – –
Payout ratio (FCF) – – –
Dividend growth (1Y) – – –
Dividend CAGR (3Y) – – –

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusCSTLCAIBLLN
Forward P/E – 302.0xFY2026 149.9xFY2026
EPS, next fiscal year $-1.31FY2026 $0.11FY2026 $0.76FY2026
EPS growth, next FY – – +442.9%FY2026
EPS growth, the year after – +236.4% +22.4%
Revenue, next fiscal year $385.85MFY2026 $1.06BFY2026 $481.76MFY2026
Revenue growth, next FY +12.1%FY2026 +30.1%FY2026 +57.9%FY2026
Revenue growth, the year after +2.3% +21.6% +27.1%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersCSTLCAIBLLN
Held by institutions 89.6% 52.0% 32.6%
Institutions holding 177 246 155
Change in shares held, QoQ -1.0% -6.3% +34.7%
Institutions buying 104 175 127
Institutions selling 55 47 13
Buyers to sellers 1.89 3.72 9.77

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

CSTLCAIBLLN
CSTL 1.00 0.36 0.16
CAI 0.36 1.00 0.10
BLLN 0.16 0.10 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, CSTL, CAI and BLLN?

Caris Life Sciences (CAI) is the largest by market capitalisation: Castle Biosciences (CSTL) $1.09B, Caris Life Sciences (CAI) $9.52B, BillionToOne (BLLN) $5.42B.

Which stock is cheaper, CSTL, CAI and BLLN?

Caris Life Sciences (CAI) trades on the lowest price-to-earnings ratio (Castle Biosciences (CSTL) -56.0x, Caris Life Sciences (CAI) 98.2x, BillionToOne (BLLN) 117.2x). On next year's consensus earnings, BillionToOne (BLLN) is cheapest (Caris Life Sciences (CAI) 302.0x, BillionToOne (BLLN) 149.9x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

BillionToOne (BLLN) grew revenue fastest over the trailing twelve months: Castle Biosciences (CSTL) +3.2%, Caris Life Sciences (CAI) +61.5%, BillionToOne (BLLN) +71.9%.

Which company is more profitable?

BillionToOne (BLLN) has the highest net margin (Castle Biosciences (CSTL) -5.4%, Caris Life Sciences (CAI) 9.2%, BillionToOne (BLLN) 10.5%). On return on invested capital, Caris Life Sciences (CAI) leads (Castle Biosciences (CSTL) -6.7%, Caris Life Sciences (CAI) 13.7%, BillionToOne (BLLN) 6.9%).

Which stock has performed better?

Over the past year Castle Biosciences (CSTL) returned the most: Castle Biosciences (CSTL) +13.0%, Caris Life Sciences (CAI) +6.5%. Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Castle Biosciences (CSTL) has been the steadiest (Castle Biosciences (CSTL) 55.6%, Caris Life Sciences (CAI) 69.8%, BillionToOne (BLLN) 93.4%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, CSTL, CAI and BLLN?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Caris Life Sciences (CAI) leads on 4. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.