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CB

Castle Biosciences, Inc. (CSTL)

NASDAQ • Healthcare

$32.31
-$0.44 (-1.4%)
Market open

Last close at September 9, 2026 at 20:00 UTC

Open$32.43
Previous Close$32.31
Day Range$32 - $33.03
Avg. Volume (3M)343.8K
Market Cap$987M
52 Week Range
$17.72$44.28
Next EarningsIn 53 daysNov 2, 2026

Metrics Over Time

Where the Money Goes

Q2 2026
Revenueeverything earned$103.5M100%
Gross Profitminus cost of goods$79.8M77%

In plain terms: out of every $100 in revenue, Castle Biosciences, Inc. currently loses $2.

Fundamentals & Financials

Revenue (TTM)
$357.2M
Net Income (TTM)
-$19.4M
EPS (TTM)
-$0.66
ROA (TTM)
-3.46%
Current Ratio
6.04

TTM is calculated as the sum of the four most recently completed quarters. This is a standard approach when monthly or real-time data is not available.

Earnings

+65.2%Q1 2026-$0.08
0.0%Q2 2026-$0.49
+82.8%Q3 2026-$0.07
Next

Nov 2

in 53 daysQ4 2026

% — EPS deviation from the forecast (beat / miss); quarters without a forecast show the reported EPS

Latest report — Q3 2026
Beat +82.8%

Castle Biosciences beat expectations in the second fiscal quarter of 2026, with revenue and EPS both topping consensus when results were reported July 30, 2026. Revenue rose 20.1% to about $103.5 million, and in the consensus comparison it topped expectations at $103.5 million versus the $86.2 million estimate, +20.1%, up from about $86.2 million a year ago. EPS of -$0.07 topped the -$0.41 estimate by $0.34, swinging from $0.15 a year ago. Profitability stayed high at the gross line with gross margin at roughly 77%, while operating margin was about -3% as the company posted an operating loss of roughly $3.1 million; net income was a loss of about $2.1 million versus about $4.5 million a year ago. The quarter generated operating cash flow of around $15.2 million. For the next period, consensus calls for EPS of -$0.38 on revenue of $92.1 million.

View full earnings history

About Castle Biosciences, Inc.

Castle Biosciences, Inc. trades on the NASDAQ as CSTL and operates in cancer diagnostics, with a focus on molecular tests for dermatological cancers. The company generated $344.2 million of revenue in FY2025 from commercial-stage testing services sold to healthcare providers, alongside its diagnostic and prognostic assays.

Name
Castle Biosciences, Inc.
CEO
Derek J. Maetzold
Website
castlebiosciences.com
Industry
Healthcare
Year Founded
2007
Employees
1,002

Today's Snapshot

AI-generated

CSTL opened 1.1% lower at 31.97, in line with a flat sector. Castle Biosciences' DecisionDx-SCC skin-cancer test showed improved accuracy in two new studies.

Trading Volume

Below 10d avg (236.2K)

17K

vs S&P 500 Today

Moderate Outperformance

+0.48%

Updated: September 10, 2026 at 14:42 UTC

Technical Indicators

3 Buy3 Neutral2 Sell
CSTL registers a buy bias driven by clear medium-term strength and a solid ADX reading, while momentum is mixed with a neutral RSI, a modest MACD and an oversold Williams %R that suggests short-term relief. The market price sits below near-term averages but remains above 50/100/200-day levels, indicating longer-term support. Volatility is moderate with ATR near five percent, whereas on-balance volume signals selling pressure and the pivot lies slightly above the current price. Technical takeaway: Buy — medium- and long-term trend strength with mixed short-term momentum and volume.
All signals
  • EMA (5 indicators)$27.79 - $32.76
    Buy
  • RSI (14)53.79
    Neutral
  • Stochastic %K (14, 3, 3)30.72
    Neutral
  • MACD Level (12, 26)1.05
    Neutral

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