Tickr
Home Explore Daily Brief Market Watchlists Portfolio
Research
Catalysts Signal Factory Screener Market News Event Calendar Valuation Plot Heat Map Top Investors Industry Trends Options
AI Assistant Notifications Account
Castle Biosciences, Inc. logo

Castle Biosciences, Inc. (CSTL) Stock Ticker

NASDAQ: CSTL · Healthcare · Medical - Diagnostics & Research
$35.81+1.76%
USD · as of 2026-09-28 · market cap $1.1B
Open CSTL in TickrDownload for iPhone

CSTL right now

Options expect by Oct 6±7.4%
Options expect by Oct 29±15.3%
Priced in for Nov 2 earnings±16.3%
IV rank (30-day)20% · cheap
From Tickr's live models · 2026-09-29. Not investment advice.

Market factors today

Tickr 500 vs S&P 500+0.49%+1.0% MTD
Momentum L/S+1.35%+15.1% MTD
High-beta momo L/S+1.46%+22.2% MTD
Rate sensitivity L/S+1.91%+6.9% MTD
Oil sensitivity L/S-2.54%-5.3% MTD
Unprofitable tech-1.43%+3.7% MTD

Unlock the full CSTL picture

🔒 Implied move chart & probabilities
🔒 Live options flow
🔒 AI analysis & chat on CSTL
🔒 Catalysts & earnings
🔒 Strategy Lab
🔒 Financials & estimates
Start your 7-day free trial

About Castle Biosciences, Inc.

Castle Biosciences, Inc. functions as a commercial-stage diagnostics firm, with its primary objective being the provision of both diagnostic and prognostic testing services, specifically targeting various dermatological cancers. Their flagship product, DecisionDx-Melanoma, represents an advanced multi-gene expression profile (GEP) assay engineered to assess the probability of metastasis in patients afflicted with invasive cutaneous melanoma. In addition to their leading solution, the company has created several other specialized, proprietary tests. Among these is DecisionDx-UM, a GEP test tailored to forecast the risk of metastasis for individuals with uveal melanoma, a less common malignancy of the eye. Another key offering is DecisionDx-SCC, a distinctive 40-gene expression profile test that utilizes a patient's unique tumor biology to predict their specific risk of squamous cell carcinoma metastasis, particularly for those presenting with recognized risk factors. Moreover, they offer DecisionDx DiffDx-Melanoma and myPath Melanoma, both proprietary GEP tests employed to assist in the accurate diagnosis of ambiguous pigmented lesions. These specialized testing services are provided by Castle Biosciences to patients predominantly through their healthcare providers. The organization commenced operations in 2007 and maintains its corporate headquarters in Friendswood, Texas.

CSTL stock facts

Ticker symbolCSTL
ExchangeNASDAQ Global Market
SectorHealthcare
IndustryMedical - Diagnostics & Research
Market cap$1.1B
CEODerek J. Maetzold
Employees1,002
HeadquartersFriendswood, TX, US
IPO date2019-07-25
Websitecastlebiosciences.com

What you can see for CSTL on Tickr

Live CSTL price chart with overlays, the options chain, implied move, IV rank, options flow and Strategy Lab, financial statements and consensus estimates, analyst ratings, catalysts, news with AI scoring, and an AI chat that has read the CSTL report.

Rankings

Largest Healthcare companiesLargest companies by market cap

FAQ

What is the ticker symbol for Castle Biosciences, Inc.?

The ticker symbol for Castle Biosciences, Inc. is CSTL, listed on the NASDAQ Global Market.

What is CSTL?

Castle Biosciences, Inc. functions as a commercial-stage diagnostics firm, with its primary objective being the provision of both diagnostic and prognostic testing services, specifically targeting various dermatological cancers. Their flagship product, DecisionDx-Melanoma, represents an advanced multi-gene expression profile (GEP) assay engineered to assess the probability of metastasis in…

HomeExploreMarketLists
All pages