Castle Biosciences

CSTLNasdaq United States Health Care Medical Specialities

Market cap

$978.501 M

$32.03 +5.12%

Close of 7 Aug 2026

Revenue

$344.2M

#2083 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 →

#28TrupanionTRUP$1.18B
#29Lumexa ImagingLMRI$1.11B
#30Castle BiosciencesCSTL$978.5M
#31Fulgent GeneticsFLGT$526.6M
#32TriSalus Life SciencesTLSI$344.5M

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 9 Aug 2026. Read the methodology.