BLLN vs CSTL vs TEM Stock Comparison

BillionToOne, Castle Biosciences and Tempus AI Prices as of Oct 27, 2026 Peers: Industry group
BLLN BillionToOne, Inc.
$114.07 -7.3% 1M
Market cap
$5.29B
P/E
175.9x
Revenue (TTM)
$397.41M
Div. yield
–
Diagnostic Labs Healthcare
5 wins
CSTL Castle Biosciences Inc
$34.51 -3.6% 1M +44.0% 1Y
Market cap
$1.12B
P/E
–
Revenue (TTM)
$357.28M
Div. yield
–
Diagnostic Labs Healthcare
2 wins
TEM Tempus AI, Inc.
$72.15 -15.1% 1M -21.2% 1Y
Market cap
$13.80B
P/E
–
Revenue (TTM)
$1.43B
Div. yield
–
Diagnostic Labs Healthcare
1 win

Head to Head

8 decided of 12

BillionToOne leads on 5 of the 12 questions below (BillionToOne 5, Castle Biosciences 2, Tempus AI 1). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionBLLNCSTLTEMLeader
Larger companyMarket capitalisation $5.29B $1.12B $13.80B TEM
Cheaper on earningsLower P/E, profitable companies only 175.9x -57.9x -54.2x –
Cheaper on forward earningsLower price / next fiscal year consensus EPS 150.1x — — –
Faster revenue growthRevenue growth, trailing twelve months +90.1% +3.2% +50.4% BLLN
More profitableNet margin, trailing twelve months 7.6% -5.4% -17.8% BLLN
Better return on capitalReturn on invested capital 7.0% -6.7% -52.0% BLLN
Less leveragedLower net debt / EBITDA -9.1x 15.5x — BLLN
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months — +44.0% -21.2% CSTL
Better 5-year returnAnnualised price return, 5 years — -11.6%/yr — –
Less volatileAnnualised volatility, 1 year 94.5% 58.3% 76.8% CSTL
Higher overall scoreMean of the five percentile scores vs peers 57/100 50/100 26/100 BLLN

Percentile Scorecard

BLLNCSTLTEM

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

AxisBLLNCSTLTEM
Valuation 20 #74 of 92 47 #49 of 92 9 #84 of 92
Growth 100 #1 of 87 52 #42 of 87 27 #64 of 87
Profitability 60 #35 of 86 39 #53 of 86 11 #77 of 86
Financial Health 97 #4 of 97 92 #9 of 97 57 #42 of 97
Shareholder Returns 7 #52 of 56 20 #45 of 56 –
Overall 57 50 26
  • BLLN ranked among 102 companies in Healthcare Providers
  • CSTL ranked among 102 companies in Healthcare Providers
  • TEM ranked among 102 companies in Healthcare Providers

Price Performance

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

Returns

PeriodBLLNCSTLTEMSPY
1 month -7.3%-3.6%-15.1% -0.2%
3 months -14.6%+44.5%+68.2% +3.9%
6 months +45.8%+39.8%+41.2% +8.2%
Year to date +39.4%-11.3%+22.2% +12.9%
1 year —+44.0%-21.2% +12.3%
3 years —+164.2%— +87.4%
3 years, per year —+38.3%— +23.3%
5 years —-46.0%— +67.9%
5 years, per year —-11.6%— +10.9%

Risk

MeasureBLLNCSTLTEMSPY
Volatility, 1Y 94.5%58.3%76.8% 12.7%
Downside volatility, 1Y 107.8%61.4%66.8% 12.7%
Beta vs S&P 500, 1Y 1.660.962.56 1.00
Return / volatility, 1Y —0.76-0.28 0.97
Max drawdown, 5Y -50.8%-82.1%-59.8% -25.4%
From 52-week high -23.9%-19.8%-21.2% -1.2%
52-week high $149.97$43.04$91.58 $779.14
52-week low $64.03$18.15$41.55 $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.

MultipleBLLNCSTLTEM
P/E now vs peer median 176.1xmedian 24.6x -54.0xmedian 24.6x -51.0xmedian 24.6x
P/S now vs peer median 13.4xmedian 1.6x 2.9xmedian 1.6x 8.8xmedian 1.6x
EV/EBITDA now vs peer median 97.2xmedian 14.6x -48.2xmedian 14.6x —median 14.6x
P/FCF now vs peer median 161.0xmedian 21.6x -2,153xmedian 21.6x -48.0xmedian 21.6x
P/B now vs peer median 10.0xmedian 3.2x 2.2xmedian 3.2x 28.4xmedian 3.2x
PEG now vs peer median —median 0.66 -1.28median 0.66 —median 0.66

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 monthsBLLNCSTLTEM
Revenue $397.41M $357.28M $1.43B
Gross profit $283.22M $276.03M $916.19M
Operating income $43.30M -$32.11M -$283.03M
Net income $37.71M -$19.42M -$254.43M
Free cash flow $33.18M -$489.00K -$263.22M
R&D $59.21M $55.45M $196.31M
EPS (diluted) $0.55 $-0.64 $-1.39
Cash & equivalents $548.63M $62.12M $599.61M
Total debt $91.03M $10.08M –
Shares (diluted) 54.46M 30.40M 182.40M
Enterprise value $3.51B $9.27M $10.83B

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
MetricBLLNCSTLTEM
P/E 176.1x -54.0x -51.0x
P/FCF 161.0x -2,153x -48.0x
P/Operating cash flow 117.8x 24.7x -53.2x
P/S 13.4x 2.9x 8.8x
P/B 10.0x 2.2x 28.4x
P/Tangible book 10.0x 2.2x 95.4x
EV/EBITDA 97.2x -48.2x –
EV/EBIT 112.8x -24.8x -41.8x
EV/Revenue 12.3x 2.2x 8.3x
EV/FCF 147.2x -1,628x -44.9x
EV/Operating cash flow 107.7x 18.7x -49.8x
PEG (3Y EPS CAGR) – -1.28 –

Growth

14 metrics
MetricBLLNCSTLTEM
Revenue growth (1Y) 90.1% 3.2% 50.4%
Revenue CAGR (3Y) – 28.7% –
Gross profit growth (1Y) 122.4% -1.6% 58.5%
Gross profit CAGR (3Y) – 29.2% –
Operating income growth (1Y) 253.2% -39.3% -20.6%
Operating income CAGR (3Y) – 30.8% –
Net income growth (1Y) 223.2% -105.1% -27.4%
Net income CAGR (3Y) – 39.8% –
EPS growth (1Y) 118.7% -99.3% -21.1%
EPS CAGR (3Y) – 42.3% –
Operating cash flow growth (1Y) – -31.8% -356.2%
Operating cash flow CAGR (3Y) – 45.1% –
Free cash flow growth (1Y) – -101.4% -278.0%
Free cash flow CAGR (3Y) – 78.8% –

Profitability

14 metrics
MetricBLLNCSTLTEM
Gross margin 71.3% 77.3% 64.0%
EBITDA margin 12.6% -4.6% –
Operating margin 10.9% -9.0% -19.8%
Pretax margin 9.5% -5.4% -17.6%
Net margin 7.6% -5.4% -17.8%
FCF margin 8.3% -0.1% -18.4%
Operating cash flow margin 11.4% 11.9% -16.6%
Return on equity 7.2% -4.2% -57.3%
Return on assets 5.3% -3.5% -11.0%
Return on invested capital 7.0% -6.7% -52.0%
Return on capital employed 6.6% -6.4% -15.2%
Asset turnover 0.6x 0.6x 0.6x
Cash conversion (OCF / net income) 1.2x -2.2x 0.9x
Stock comp / revenue 6.4% 12.6% 13.0%

Financial Health

11 metrics
MetricBLLNCSTLTEM
Debt / assets 12.5% 1.8% –
Debt / equity 0.2x 0.0x –
Net debt / EBITDA -9.1x 15.5x –
Debt / FCF 2.7x -20.6x –
Liabilities / assets 26.4% 16.2% 81.2%
Equity / assets 73.6% 83.8% 18.8%
Interest coverage 1,056x -85.6x -5.1x
Current ratio 11.7x 6.0x 3.3x
Quick ratio 11.2x 5.6x 3.1x
Cash ratio 9.8x 4.7x 2.1x
Altman Z-score 17.86 7.39 3.13

Shareholder Returns

7 metrics
MetricBLLNCSTLTEM
Dividend yield – – –
Net buyback yield -5.7% -0.5% –
Shareholder yield -5.7% -0.5% 0.0%
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.

ConsensusBLLNCSTLTEM
Forward P/E 150.1xFY2026 – –
EPS, next fiscal year $0.76FY2026 $-1.31FY2026 $-0.21FY2026
EPS growth, next FY +442.9%FY2026 – –
EPS growth, the year after +22.4% – –
Revenue, next fiscal year $481.76MFY2026 $385.85MFY2026 $1.64BFY2026
Revenue growth, next FY +57.9%FY2026 +12.1%FY2026 +29.0%FY2026
Revenue growth, the year after +27.1% +2.3% +24.1%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersBLLNCSTLTEM
Held by institutions 32.6% 89.6% 63.0%
Institutions holding 155 177 483
Change in shares held, QoQ +34.7% -1.0% +5.0%
Institutions buying 127 104 284
Institutions selling 13 55 118
Buyers to sellers 9.77 1.89 2.41

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.

BLLNCSTLTEM
BLLN 1.00 0.16 0.30
CSTL 0.16 1.00 0.49
TEM 0.30 0.49 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, BLLN, CSTL and TEM?

Tempus AI (TEM) is the largest by market capitalisation: BillionToOne (BLLN) $5.29B, Castle Biosciences (CSTL) $1.12B, Tempus AI (TEM) $13.80B.

Which company is growing faster?

BillionToOne (BLLN) grew revenue fastest over the trailing twelve months: BillionToOne (BLLN) +90.1%, Castle Biosciences (CSTL) +3.2%, Tempus AI (TEM) +50.4%.

Which company is more profitable?

BillionToOne (BLLN) has the highest net margin (BillionToOne (BLLN) 7.6%, Castle Biosciences (CSTL) -5.4%, Tempus AI (TEM) -17.8%). On return on invested capital, BillionToOne (BLLN) leads (BillionToOne (BLLN) 7.0%, Castle Biosciences (CSTL) -6.7%, Tempus AI (TEM) -52.0%).

Which stock has performed better?

Over the past year Castle Biosciences (CSTL) returned the most: Castle Biosciences (CSTL) +44.0%, Tempus AI (TEM) -21.2%. Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Castle Biosciences (CSTL) has been the steadiest (BillionToOne (BLLN) 94.5%, Castle Biosciences (CSTL) 58.3%, Tempus AI (TEM) 76.8%). Volatility measures how widely the price swings, not the risk of the business.

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

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, BillionToOne (BLLN) leads on 5. 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.