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CB

Castle Biosciences, Inc. (CSTL)

NASDAQHealthcare

$35.47
-$0.02 (-0.1%)
Market closed

Last close at September 16, 2026 at 20:00 UTC

Open$35.5
Day Range$35.26 - $36.81
Avg. Volume (3M)347.3K
Market Cap$1B
52 Week Range
$17.72$44.28
Next EarningsIn 47 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 47 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
Industry
Healthcare
Year Founded
2007
Employees
1,002

Today's Snapshot

AI-generated

CSTL closed slightly lower at 35.48, in line with a flat sector. Volume was roughly twice its usual level. Castle Biosciences' TissueCypher cancer-risk test drew fresh attention after a new study.

Trading Volume

Above 10d avg 277.4K

558.5K

vs S&P 500 Today

Outperforming Market

+0.52%

Updated: September 16, 2026 at 20:22 UTC

Technical Indicators

5 Buy3 Neutral0 Sell
CSTL is trading above its short-, medium- and long-term moving averages amid strong trend readings and clear positive momentum, showing a bullish technical profile. Momentum indicators, including an elevated commodity-channel index and a high RSI, reinforce upside strength while MACD is positive, and ADX above the mid-30s confirms a robust trend. Volume-based measures are supportive and volatility is moderate, with ATR indicating normal intraday moves. Technical takeaway: Strong Buy — robust trend and momentum with volume support and prices comfortably above key moving averages.
All signals
  • EMA (5 indicators)$28.30 - $33.71
    Buy
  • RSI (14)68.31
    Neutral
  • Stochastic %K (14, 3, 3)74.66
    Neutral
  • MACD Level (12, 26)1.19
    Neutral
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