BLLN vs CAI vs CSTL Stock Comparison

BillionToOne, Caris Life Sciences and Castle Biosciences Prices as of Nov 5, 2026 Peers: Industry group
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BLLN BillionToOne, Inc.
$112.39 +12.5% 1M
Market cap
$5.35B
P/E
115.6x
Revenue (TTM)
$436.87M
Div. yield
–
Diagnostic Labs Healthcare
4 wins
CSTL Castle Biosciences Inc
$34.20 +2.5% 1M +1.9% 1Y
Market cap
$1.05B
P/E
–
Revenue (TTM)
$377.13M
Div. yield
–
Diagnostic Labs Healthcare
2 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.

QuestionBLLNCAICSTLLeader
Larger companyMarket capitalisation $5.35B $7.46B $1.05B CAI
Cheaper on earningsLower P/E, profitable companies only 115.6x 76.9x -45.5x CAI
Cheaper on forward earningsLower price / next fiscal year consensus EPS 147.9x 236.6x — BLLN
Faster revenue growthRevenue growth, trailing twelve months +71.9% +61.5% +9.8% BLLN
More profitableNet margin, trailing twelve months 10.5% 9.2% -6.1% BLLN
Better return on capitalReturn on invested capital 6.9% 13.7% -5.8% CAI
Less leveragedLower net debt / EBITDA -9.1x -2.3x 22.2x BLLN
Higher dividend yieldTrailing dividend yield — 0.00% — –
Better 1-year returnPrice return, last 12 months — -10.9% +1.9% CSTL
Better 5-year returnAnnualised price return, 5 years — — -10.5%/yr –
Less volatileAnnualised volatility, 1 year 93.3% 73.7% 55.5% CSTL
Higher overall scoreMean of the five percentile scores vs peers 57/100 65/100 47/100 CAI

Percentile Scorecard

BLLNCAICSTL

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

AxisBLLNCAICSTL
Valuation 21 #75 of 95 22 #74 of 95 42 #56 of 95
Growth 100 #1 of 88 99 #2 of 88 49 #45 of 88
Profitability 59 #36 of 87 72 #25 of 87 37 #55 of 87
Financial Health 98 #3 of 100 79 #22 of 100 86 #15 of 100
Shareholder Returns 7 #56 of 60 54 #28 of 60 22 #47 of 60
Overall 57 65 47
  • BLLN ranked among 102 companies in Healthcare Providers
  • CAI ranked among 102 companies in Healthcare Providers
  • CSTL ranked among 102 companies in Healthcare Providers

Price Performance

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

Returns

PeriodBLLNCAICSTLSPY
1 month +12.5%-5.2%+2.5% -5.9%
3 months +22.6%+30.2%+12.2% -4.6%
6 months +21.0%+31.2%+77.8% +0.2%
Year to date +37.3%-3.5%-12.1% +7.5%
1 year —-10.9%+1.9% +8.2%
3 years ——+89.4% +68.3%
3 years, per year ——+23.7% +19.0%
5 years ——-42.6% +56.5%
5 years, per year ——-10.5% +9.4%

Risk

MeasureBLLNCAICSTLSPY
Volatility, 1Y 93.3%73.7%55.5% 13.6%
Downside volatility, 1Y 106.1%77.8%62.0% 14.2%
Beta vs S&P 500, 1Y 1.491.991.14 1.00
Return / volatility, 1Y —-0.150.03 0.60
Max drawdown, 5Y -50.8%-63.0%-81.0% -25.4%
From 52-week high -25.1%-28.0%-20.5% -5.9%
52-week high $149.97$36.14$43.04 $779.14
52-week low $64.03$14.55$18.15 $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.

MultipleBLLNCAICSTL
P/E now vs peer median 115.6xmedian 24.8x 76.9xmedian 24.8x -45.5xmedian 24.8x
P/S now vs peer median 12.3xmedian 1.6x 7.1xmedian 1.6x 2.8xmedian 1.6x
EV/EBITDA now vs peer median 94.0xmedian 15.9x 42.6xmedian 15.9x -65.0xmedian 15.9x
P/FCF now vs peer median 157.9xmedian 20.9x 258.2xmedian 20.9x 265.6xmedian 20.9x
P/B now vs peer median 9.4xmedian 3.3x 11.7xmedian 3.3x 2.2xmedian 3.3x
PEG now vs peer median —median 0.88 —median 0.88 -1.28median 0.88

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 monthsBLLNCAICSTL
Revenue $436.87M $1.05B $377.13M
Gross profit $311.95M $724.14M $290.66M
Operating income $44.69M $139.94M -$28.04M
Net income $49.39M $96.06M -$23.01M
Free cash flow $33.91M $28.91M $3.96M
R&D $66.47M $129.36M $58.29M
EPS (diluted) $0.86 $0.33 $-0.75
Cash & equivalents $561.51M $665.32M $78.00M
Total debt $89.00M $393.27M $10.08M
Shares (diluted) 53.73M 295.14M 30.63M
Enterprise value $3.21B $4.28B -$53.36M

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
MetricBLLNCAICSTL
P/E 115.6x 76.9x -45.5x
P/FCF 157.9x 258.2x 265.6x
P/Operating cash flow 111.7x 89.0x 26.5x
P/S 12.3x 7.1x 2.8x
P/B 9.4x 11.7x 2.2x
P/Tangible book 9.4x 11.7x 2.2x
EV/EBITDA 94.0x 42.6x -65.0x
EV/EBIT 109.2x 50.7x -28.0x
EV/Revenue 11.2x 6.8x 2.1x
EV/FCF 143.9x 245.2x 198.0x
EV/Operating cash flow 101.9x 84.5x 19.7x
PEG (3Y EPS CAGR) – – -1.28

Growth

14 metrics
MetricBLLNCAICSTL
Revenue growth (1Y) 71.9% 61.5% 9.8%
Revenue CAGR (3Y) – – 25.2%
Gross profit growth (1Y) 88.4% 86.2% 5.8%
Gross profit CAGR (3Y) – – 24.7%
Operating income growth (1Y) 844.7% 274.2% 19.7%
Operating income CAGR (3Y) – – 30.9%
Net income growth (1Y) 593.9% 151.4% -88.1%
Net income CAGR (3Y) – – 32.7%
EPS growth (1Y) 193.7% 114.2% -78.5%
EPS CAGR (3Y) – – 35.6%
Operating cash flow growth (1Y) 794.7% 15,464% -35.7%
Operating cash flow CAGR (3Y) – – 49.1%
Free cash flow growth (1Y) 934.5% 306.4% -84.4%
Free cash flow CAGR (3Y) – – 28.0%

Profitability

14 metrics
MetricBLLNCAICSTL
Gross margin 71.4% 69.1% 77.1%
EBITDA margin 11.9% 15.9% -3.2%
Operating margin 10.2% 13.4% -7.4%
Pretax margin 11.4% 9.3% -6.0%
Net margin 10.5% 9.2% -6.1%
FCF margin 7.8% 2.8% 1.1%
Operating cash flow margin 11.0% 8.0% 10.5%
Return on equity 9.0% 15.6% -4.9%
Return on assets 6.6% 7.7% -4.0%
Return on invested capital 6.9% 13.7% -5.8%
Return on capital employed 6.5% 12.9% -5.6%
Asset turnover 0.6x 0.8x 0.7x
Cash conversion (OCF / net income) 1.0x 0.9x -1.7x
Stock comp / revenue 7.0% 6.7% 11.7%

Financial Health

11 metrics
MetricBLLNCAICSTL
Debt / assets 11.7% 31.3% 1.7%
Debt / equity 0.2x 0.6x 0.0x
Net debt / EBITDA -9.1x -2.3x 22.2x
Debt / FCF 2.6x 13.6x 2.5x
Liabilities / assets 25.5% 49.1% 17.4%
Equity / assets 74.5% 50.9% 82.6%
Interest coverage 1,655x 3.3x -51.2x
Current ratio 11.2x 6.7x 5.3x
Quick ratio 10.7x 5.7x 4.9x
Cash ratio 9.3x 4.8x 4.1x
Altman Z-score 17.88 6.51 6.75

Shareholder Returns

7 metrics
MetricBLLNCAICSTL
Dividend yield – – –
Net buyback yield -5.7% 0.0% -0.7%
Shareholder yield -5.7% 0.0% -0.7%
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.

ConsensusBLLNCAICSTL
Forward P/E 147.9xFY2026 236.6xFY2026 –
EPS, next fiscal year $0.76FY2026 $0.11FY2026 $-1.30FY2026
EPS growth, next FY +442.9%FY2026 – –
EPS growth, the year after +22.4% +236.4% –
Revenue, next fiscal year $481.76MFY2026 $1.06BFY2026 $386.63MFY2026
Revenue growth, next FY +57.9%FY2026 +30.1%FY2026 +12.3%FY2026
Revenue growth, the year after +27.1% +21.6% +3.9%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersBLLNCAICSTL
Held by institutions 32.6% 52.0% 89.6%
Institutions holding 155 246 177
Change in shares held, QoQ +34.7% -6.3% -1.0%
Institutions buying 127 174 104
Institutions selling 13 47 55
Buyers to sellers 9.77 3.70 1.89

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.

BLLNCAICSTL
BLLN 1.00 0.10 0.16
CAI 0.10 1.00 0.38
CSTL 0.16 0.38 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, BLLN, CAI and CSTL?

Caris Life Sciences (CAI) is the largest by market capitalisation: BillionToOne (BLLN) $5.35B, Caris Life Sciences (CAI) $7.46B, Castle Biosciences (CSTL) $1.05B.

Which stock is cheaper, BLLN, CAI and CSTL?

Caris Life Sciences (CAI) trades on the lowest price-to-earnings ratio (BillionToOne (BLLN) 115.6x, Caris Life Sciences (CAI) 76.9x, Castle Biosciences (CSTL) -45.5x). On next year's consensus earnings, BillionToOne (BLLN) is cheapest (BillionToOne (BLLN) 147.9x, Caris Life Sciences (CAI) 236.6x). 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: BillionToOne (BLLN) +71.9%, Caris Life Sciences (CAI) +61.5%, Castle Biosciences (CSTL) +9.8%.

Which company is more profitable?

BillionToOne (BLLN) has the highest net margin (BillionToOne (BLLN) 10.5%, Caris Life Sciences (CAI) 9.2%, Castle Biosciences (CSTL) -6.1%). On return on invested capital, Caris Life Sciences (CAI) leads (BillionToOne (BLLN) 6.9%, Caris Life Sciences (CAI) 13.7%, Castle Biosciences (CSTL) -5.8%).

Which stock has performed better?

Over the past year Castle Biosciences (CSTL) returned the most: Caris Life Sciences (CAI) -10.9%, Castle Biosciences (CSTL) +1.9%. Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Castle Biosciences (CSTL) has been the steadiest (BillionToOne (BLLN) 93.3%, Caris Life Sciences (CAI) 73.7%, Castle Biosciences (CSTL) 55.5%). Volatility measures how widely the price swings, not the risk of the business.

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

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.