How Castle Biosciences makes money

Period

FY2025

How does Castle Biosciences make money? This Sankey traces every dollar of revenue through the income statement — into cost of revenue, R&D, SG&A, and taxes — and shows what's left as profit. Pick any fiscal year, recent quarter, or the trailing twelve months. Straight from SEC filings.

Castle Biosciences Inc. · FY2025 · year ended 2025-12-31

Revenue$344MNet loss$24M · 7%Cost of revenue$71M · 21%Gross profit$273M · 79%Operating expenses$316M · 92%Other income$19M · 5%R&D$52M · 15%SG&A$229M · 67%Other opex$35M · 10%Dermatologic$216M · 63%Non Dermatologic$128M · 37%

Each fiscal year from SEC filings. Percentages are share of revenue, so the green profit nodes read directly as gross / operating / net margin. Line items a company doesn't break out are derived from their siblings so the flows balance; small residuals show as “Other.” For informational purposes only.