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CASTLE BIOSCIENCES INC CSTL

Nasdaq · stock · Services-Medical Laboratories · website · IPO 2019-07-25 · LEI

CASTLE BIOSCIENCES INC statistics & valuation

Market cap$737.0M
P / S2.1×
P / B1.6×
P / FCF26.0×
Net margin-7.0%
Return on equity-5.1%
FCF margin8.2%
Net cash$106.7M
Enterprise value USD$630.3M
Earnings yield EBIT/EV-6.8%
Return on capital-8.4%

Market cap as of 2026-06-29. Multiples are price-derived and refreshed daily; everything else from the latest financial reports.

Profitability & efficiency

Net margin (%)
-27.90% 10.20% -16.40% -33.30% -49.00% -26.10% 5.50% -7.00% 20182019202020212022202320242025
Gross margin (%)
76.80% 85.90% 84.50% 20182019202020212022202320242025
Operating margin (%)
-16.80% 14.10% -10.40% -42.60% -53.20% -30.90% 2.60% -12.40% 20182019202020212022202320242025
Return on equity (%)
6.20% -2.50% -7.60% -16.80% -14.70% 4.00% -5.10% 20182019202020212022202320242025
Shares outstanding
1.9M 17.1M 24.8M 25.4M 26.6M 27.4M 29.3M 29.7M 20182019202020212022202320242025
Net debt ($)
$20.0M -$72.2M -$409.9M -$98.8M -$109.7M -$106.7M 20182019202020212022202320242025
Share buybacks ($)
20182019202020212022202320242025
Return on assets (%)
-28.40% 4.40% -2.30% -6.80% -15.00% -12.70% 3.40% -4.20% 20182019202020212022202320242025
Free cash flow margin (%)
-55.20% 11.70% 8.20% -23.90% -34.50% -8.80% 11.00% 8.20% 20182019202020212022202320242025
Debt / equity (×)
0.31× 0.00× 0.00× 0.02× 0.02× 20182019202020212022202320242025
EPS ($)
-$5.33 -$0.21 -$0.54 -$1.24 -$2.58 -$2.14 $0.62 -$0.83 20182019202020212022202320242025

Margins and returns computed from annual filings. Falling shares outstanding = buybacks; rising = dilution. Net debt = debt − cash (negative = net cash).

Key ratios (by fiscal year)

RatioFY2025FY2024FY2023FY2022FY2021FY2020FY2019FY2018
Gross margin—————84.5%85.9%76.8%
Operating margin-12.4%2.6%-30.9%-53.2%-42.6%-10.4%14.1%-16.8%
Net margin-7.0%5.5%-26.1%-49.0%-33.3%-16.4%10.2%-27.9%
FCF margin8.2%11.0%-8.8%-34.5%-23.9%8.2%11.7%-55.2%
Return on assets-4.2%3.4%-12.7%-15.0%-6.8%-2.3%4.4%-28.4%
Return on equity-5.1%4.0%-14.7%-16.8%-7.6%-2.5%6.2%11.3%
Debt / equity0.02×0.02×0.00×——0.00×0.31×-0.43×
Current ratio5.267.296.208.0914.2120.587.632.69

Computed from company filings · US · as of 2025-12-31. Facts plus Stocktoria's own computed scores — not investment advice.