CSTL

NASD Castle Biosciences, Inc.
Oct 5, 2026 · 8:22 PM ET LAST TRADE Market Closed

$36.65 ↑ +0.00 (+0.00%) Trading Up from the previous close of $36.65, $0.11 below the day’s high of $36.76

YTD change
-5.78%
vs 20-day SMA
+5.92%
vs 200-day SMA
+26.00%

Price ranges

Previous day
$34.75 $35.92
open $35.56 close $35.56
+$0.00 (+0.00%)
Today
$35.10 $36.76
open $35.45 now $36.65
+$1.20 (+3.39%)
Past week
$34.14 $36.99
from $35.81 now $36.65
+$0.84 (+2.35%)
Past month
$31.44 $36.99
from $32.65 now $36.65
+$4.00 (+12.25%)
This year
$17.72 $44.28
from $38.90 now $36.65
-$2.25 (-5.78%)

Price & Performance

+10.83 (+43.79%) / 6M

$16.66$23.86$31.07$38.27Apr 6Jul 6Oct 2

Signals & Sentiment

Momentum, market sentiment, and recent alerts

Very Good
  • The stock is 66.0% away from all-time highs of $107.69
  • CSTL is down 6% since the beginning of the year
  • CSTL is up 61% over the past 12 months
  • CSTL is up 12% over the past 1 month
  • 6% of all CSTL investors are betting against CSTL

CSTL reads very good: price sits above both the 20- and 200-day averages, the 12-month move is +52.6%.

Financial Strength

Earnings, valuation, and balance sheet

Earnings

Profitable No
EPS $-0.07
Earnings momentum +80.3% Quarterly EPS growth
Quarterly change +80.3%

Valuation

P/E ratio N/A
Enterprise value $850.8M
Beta 0.71

Balance sheet & scale

IncomeN/A
Revenue$357.3M
Cash$266.8M
Debt$36.6K
Income / Debt N/A

Company & Peers

Company profile and competitor comparison

Company profile

ExchangeNASD
Sector Manufacturing
Sub Sector Chemical Manufacturing
Market cap $1.1B

Castle Biosciences, Inc. is a molecular diagnostics company, which offers innovative test solutions to aid clinicians in the diagnosis and treatment of dermatologic cancers, barrett’s esophagus, uveal melanoma, and in the treatment of mental health conditions. The firm offers DecisionDx-Melanoma, a proprietary multi-gene expression profile (GEP) test that predicts the risk of metastasis and recurrence for patients diagnosed with invasive cutaneous melanoma. It also markets DecisionDx-UM, Decision Dx DiffDx-Melanoma, DecisonDx-CMSeq, DecisionDx-SCC, DecsionDx-UMSeq, and DecisonDX-PRAME. The company was founded by Derek J. Maetzold in September 2007 and is headquartered in Friendswood, TX.

Competitor comparison

TickerCompany PriceChange
LLY Eli Lilly and Company $1,142.85 -0.61%
JNJ Johnson & Johnson $256.03 -1.02%
ABBV AbbVie, Inc. $262.82 +1.11%
MRK Merck & Co., Inc. $144.30 +0.34%
RHHVF Roche Holding Ltd $428.22 -3.25%

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Prices and alerts are delayed by at least 20 minutes. Chart history reflects daily closing prices. Information is provided for research purposes only and is not investment advice.