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NASDAQ · CSTL

Castle Biosciences, Inc.

Healthcare · Medical - Diagnostics & Research

$38.51

Down-$1.35 (-3.51%)

Updated Oct 31, 2026, 1:24 AM

SID Score

6.0/10

Composite research score

Smart Money

—

Institutional and insider signal

Market cap
1.11B
P/E ratio
-115.98
Dividend yield
0.00%
52-week range
$17.72 – $38.73
Volume
723.82K
Avg. volume
400.7K

Price performance · CSTL

CSTL price history

1M range · 21 trading sessions · Daily adjusted prices

Prices through Oct 30, 2026

CSTL closed at $37.16 after 21 trading sessions, up 4.50% for the selected period.

Last close
$37.16
Period change
+4.50%
Period low
$31.96
Period high
$38.51
Daily close
View OHLC price history
CSTL OHLC price history, latest 40 sessions
DateOpenHighLowCloseVolume
Oct 30, 2026$38.03$38.43$36.73$37.16334.26K
Oct 29, 2026$37.57$38.725$36.08$38.51723.82K
Oct 28, 2026$34.51$37.3799$34.51$36.68431.24K
Oct 27, 2026$33.55$34.66$33.19$34.51295.21K
Oct 26, 2026$33.20$33.785$32.84$33.30235.84K
Oct 23, 2026$33.41$33.62$32.69$33.08203.02K
Oct 22, 2026$34.13$34.55$33.06$33.19335.42K
Oct 21, 2026$33.15$34.72$32.93$34.37336.59K
Oct 20, 2026$32.65$33.55$32.09$33.15272.49K
Oct 19, 2026$32.44$32.74$31.67$32.165347.23K
Oct 16, 2026$33.82$34.15$31.795$31.96381.93K
Oct 15, 2026$33.13$34.06$32.48$33.80381.94K
Oct 14, 2026$32.47$33.77$32.47$33.11243.28K
Oct 13, 2026$32.79$33.35$32.23$32.88241.7K
Oct 12, 2026$34.42$34.42$32.31$32.76238.98K
Oct 9, 2026$33.52$34.52$33.39$34.42249.08K
Oct 8, 2026$32.54$33.76$32.25$33.71373.8K
Oct 7, 2026$33.15$33.72$32.77$33.00351.53K
Oct 6, 2026$36.65$37.99$33.10$33.36609.15K
Oct 5, 2026$35.45$36.76$35.10$36.65377.26K
Oct 2, 2026$35.56$35.92$34.75$35.56167.72K

Latest CSTL news

The latest Smart Investors Daily articles mentioning CSTL.

Stock researchCompany · Overview

CSTL research

Overview

Company profile and research snapshot.

Company profile

Castle Biosciences Inc is a molecular diagnostics company. The group provides test solutions for the diagnosis and treatment of dermatologic cancers, Barrett's esophagus (BE), and uveal melanoma. The product portfolio of the company includes DecisionDx-Melanoma, a risk stratification gene expression profile (GEP) test; DecisionDx-SCC, a risk stratification test for cutaneous squamous cell carcinoma; MyPath Melanoma, a diagnostic GEP test for use in patients with difficult-to-diagnose melanocytic lesions; and TissueCypher, a test to predict future development of progression of high-grade dysplasia and/or esophageal cancer. It also provides DecisionDx-UM, a risk stratification GEP test. The company also offers its products to the skin cancer and gastroenterology markets.

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Analyst outlook

Consensus and target data currently published for this company.

Consensus
—
Average target
$38.00
Implied upside
—
Analysts
—
CSTL recent ratings
DateFirmRatingTarget
Aug 3, 2026BTIGBuy—
Jun 25, 2026Roth CapitalBuy—
May 13, 2026BTIGBuy—
May 7, 2026BairdOutperform—
Apr 20, 2026Canaccord GenuityBuy—
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News briefing

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Benzinga · Feb 19, 2026

Castle Biosciences Publishes A Prospective, Multicenter Clinical Validation Study In The Journal Of The American Academy Of Dermatology Demonstrating That Its AdvanceAD-Tx Test Can Identify Patients With Moderate-To-Severe Atopic Dermatitis Who Are More Likely To Achieve Greater And Faster Clinical Responses When Treated With A Janus Kinase Inhibitor Compared To T Helper Type 2 Targeted Therapies

Castle Biosciences, Inc. (NASDAQ:CSTL), a company improving health through innovative tests that guide patient care, today announced the publication of a prospective, multicenter clinical validation study in

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