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CSTL

Castle Biosciences INC

COMMON STOCK · NASDAQ

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Price and daily change

Earnings5 Nov 2026

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Market cap: Sign in
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Short interest: 6.47%
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Price chart (1D to 10Y)

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Trading information

Beta: Sign in
Shares outstandingAs of 2026-07-23 · filed common shares: 30.54M
Shares float: Sign in
Float %: Sign in
Insider ownershipDirectors and officers, from their latest Form 3/4/5 holding: 0.85%
Institutional ownership: Sign in
Short interestShare of shares outstanding, at settlement: 6.47%
Short ratioDays to cover, as published by FINRA: 5.05
Short volume (5D)Share of FINRA reporting-facility volume sold short, daily flow: 44.20%
Short volume (20D)Share of FINRA reporting-facility volume sold short, daily flow: 46.10%
Avg volume (10D)

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Source: SEC filings. Information and analytics, not investment advice.

Rev growth (fwd)

Avg volume (3 months)

Profitability

Gross marginTTM to Jun 26: 77.26%
Operating marginTTM to Jun 26: -8.99%
Net margin: —
EBITDA marginTTM to Jun 26: -4.62%
Return on equityNet income (TTM to Jun 26) ÷ average shareholders equity: -4.20%
Return on assetsNet income (TTM to Jun 26) ÷ average total assets: -3.51%

Growth

Revenue growth (annual YoY): 3.66%
Revenue growth (latest qtr YoY): 20.14%
Revenue growth (fwd): Sign in
Net income growth (annual YoY)FY Dec 25 vs FY Dec 24: -232.41%
Net income growth (latest qtr YoY): -145.54%
EPS growth (fwd): Sign in
Net income growth (QoQ): —

Valuation

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Price / sales

Price / operating cash flow

P/FCF

EV / revenue

EV / EBITDA

EPSDiluted, TTM to Jun 26

-0.64

EPS (fwd)

Financial health

Cash & equivalentsas of Jun 26: $62.11M
Total cash: Sign in
Total debtBorrowings + finance and operating lease liabilities, as of Jun 26: $36.65M
Debt / equityas of Jun 26: 7.80%
Current ratioas of Jun 26: 6.04
Quick ratio(Cash + marketable securities + receivables) ÷ current liabilities, as of Jun 26: 5.58
Operating cash flowTTM to Jun 26: $42.63M
Free cash flowUnadjusted FCF = CFO − capex · TTM to Jun 26: -$489.00K
TTM revenue / diluted shareDiluted, TTM to Jun 26: 12.10

CSTL stock Statistics — Castle Biosciences INC filings, insiders & smart money · Instaport