Castle Biosciences

CSTLNasdaq United States Health Care Medical Specialities

Market cap

$1.069 B

$34.99 -0.99%

Close of 21 Sept 2026

Revenue

$344.2M

#2076 by revenue

Earnings

-$24.2M

Loss-making

Shares outstanding

30,549,507

Latest filing cover page

P/E ratio

—

Cap ÷ net income

Medical Specialities, ranked by market cap

All 44 →

#27Alignment HealthcareALHC$1.73B
#28TrupanionTRUP$1.10B
#29Castle BiosciencesCSTL$1.07B
#30Lumexa ImagingLMRI$1.03B
#31Fulgent GeneticsFLGT$592.7M

What if Castle Biosciences were worth as much as…

Open the what-if tool →

Gold $30.3T

$990,983.39

Per share 28,322× higher

Bitcoin $1.72T

$56,295.63

Per share 1,609× higher

Nvidia $5.48T

$179,376.32

Per share 5,127× higher

Or at a round number

$2.00B $5.00B $10.0B $20.0B

Where these numbers come from

Share counts and financials for Castle Biosciences are taken from its own SEC filings via EDGAR: public record, not an estimate. Market cap is shares outstanding multiplied by the latest close. Last updated 22 Sept 2026. Read the methodology.