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CSTL

Castle Biosciences, Inc.

$33.67 +0.00 (+0.00%)

1-Minute Take

TL;DR: Castle Biosciences, Inc. is a commercial-stage diagnostics company focused on providing diagnostic and prognostic testing services, primarily for dermatological cancers. Their lead product, DecisionDx-Melanoma, assesses.
What Matters:
  • Upcoming: Publication of new clinical data supporting the utility of DecisionDx
  • Ongoing: Increasing adoption of DecisionDx-Melanoma among dermatologists and onc
  • Ongoing: Expansion of the company's sales force and marketing efforts.
Key Risks:
  • Potential: Changes in reimbursement policies for diagnostic tests.
  • Potential: Competition from new entrants and disruptive technologies.
What to Watch:
  • Next earnings report and guidance
  • Analyst consensus and price targets
Medium Confidence Based on verified company data and analysis

Data sources: market data, fundamentals, news providers. Data may be delayed.

Company Overview

Key Statistics

Volume
190.9K
Market Cap
$982.78M
MoonshotScore
66.5/100
FOMO Score
6.0

MoonshotScore Breakdown: 66.5/100

Revenue Growth
8/100 51.1%
Gross Margin
10/100 79.9%
Operating Leverage
6/100 Positive
Cash Runway
8/100 $120M
R&D Intensity
7/100 15.7%
Insider Activity
3/100 -$0.16M
Short Interest
10/100 1.62%
Price Momentum
5/100 Oversold RSI, Above SMA200
News Sentiment
5/100 N/A

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Castle Biosciences offers innovative diagnostic solutions for dermatological cancers, highlighted by their DecisionDx-Melanoma test, providing critical prognostic information for personalized patient care and positioning them as a leader in molecular dermatology diagnostics with a gross margin of 79.9%.

About CSTL

Castle Biosciences, Inc. is a commercial-stage diagnostics company focused on providing diagnostic and prognostic testing services, primarily for dermatological cancers. Their lead product, DecisionDx-Melanoma, assesses metastasis risk in cutaneous melanoma patients.

📊 Healthcare 🏢 Medical - Diagnostics & Research
CEO: Derek J. Maetzold HQ: Friendswood, TX, US Employees: 784 Founded: 2019

Castle Biosciences, Inc. Company Overview

Founded in 2007 and headquartered in Friendswood, Texas, Castle Biosciences, Inc. is a commercial-stage diagnostics company dedicated to transforming patient care through innovative diagnostic and prognostic testing services. The company specializes in dermatological cancers, offering a suite of proprietary tests designed to provide critical information for treatment decisions. Castle Biosciences' flagship product, DecisionDx-Melanoma, is a multi-gene expression profile (GEP) test that predicts the risk of metastasis in patients diagnosed with invasive cutaneous melanoma. This test helps physicians tailor treatment plans based on individual patient risk profiles. Beyond melanoma, Castle Biosciences offers DecisionDx-UM, a GEP test for uveal melanoma, a rare eye cancer, predicting metastasis risk. The company also provides DecisionDx-SCC, a 40-gene expression profile test predicting squamous cell carcinoma metastasis risk, and DecisionDx DiffDx-Melanoma and myPath Melanoma, GEP tests aiding in the diagnosis of suspicious pigmented lesions. Castle Biosciences markets its tests directly to physicians, enabling them to provide personalized and informed care to their patients. The company's commitment to innovation and precision diagnostics has established it as a key player in the evolving landscape of dermatological cancer management.

Investment Thesis

Castle Biosciences presents a compelling investment opportunity due to its innovative diagnostic solutions and strong market position in dermatological cancer testing. The company's lead product, DecisionDx-Melanoma, addresses a critical need in melanoma management, driving adoption and revenue growth. With a gross margin of 79.9%, Castle Biosciences demonstrates strong profitability potential as it scales its operations. Further growth is expected from the expansion of its product portfolio, including DecisionDx-UM and DecisionDx-SCC, targeting niche but significant markets. The increasing incidence of skin cancer and the growing demand for personalized medicine create a favorable backdrop for Castle Biosciences' continued success. While the company currently has a negative P/E ratio of -67.05, strategic execution and market penetration should drive long-term value creation.

Key Financial Highlights

  • Gross margin of 79.9% demonstrates strong profitability potential in the diagnostics market.
  • Lead product, DecisionDx-Melanoma, addresses a critical need in melanoma management, driving adoption.
  • Offers a suite of proprietary tests including DecisionDx-UM and DecisionDx-SCC, expanding its market reach.
  • Focus on dermatological cancers positions the company in a high-growth area with increasing incidence rates.
  • Market Cap of $0.96B reflects investor confidence in the company's growth prospects.

Industry Context

Castle Biosciences operates within the medical diagnostics and research industry, specifically focusing on dermatological cancer diagnostics. The industry is characterized by increasing demand for personalized medicine and advanced diagnostic tools. The market for cancer diagnostics is expected to continue growing, driven by rising cancer incidence rates and technological advancements. Castle Biosciences competes with companies offering similar diagnostic services, such as AMN Healthcare Services and Exact Sciences (not listed in peers). The company's focus on gene expression profiling and its proprietary tests provide a competitive edge in this rapidly evolving landscape.

Quarterly Financial Summary

Quarter Revenue Net Income EPS
Q3 2025 $83M $-501,000 $-0.02
Q2 2025 $86M $5M $0.15
Q1 2025 $88M -$26M $-0.90
Q4 2024 $86M $10M $0.32

Source: Company filings. Data may be delayed.

Growth Opportunities

  • Expansion of DecisionDx-Melanoma Utilization: Increasing the adoption of DecisionDx-Melanoma among dermatologists and oncologists represents a significant growth opportunity. The market for melanoma diagnostics is substantial, driven by rising incidence rates. By demonstrating the clinical and economic value of DecisionDx-Melanoma, Castle Biosciences can further penetrate this market and drive revenue growth. This includes educating physicians on the test's ability to improve patient outcomes and reduce healthcare costs.
  • Penetration of the Uveal Melanoma Market with DecisionDx-UM: Uveal melanoma, while rare, represents a significant unmet need for accurate prognostic testing. DecisionDx-UM provides valuable information for managing patients with this aggressive cancer. By expanding its reach within the uveal melanoma market, Castle Biosciences can capture a larger share of this niche but high-value segment. This involves building relationships with key opinion leaders and presenting clinical data supporting the test's utility.
  • Growth in Squamous Cell Carcinoma Testing with DecisionDx-SCC: The DecisionDx-SCC test addresses the need for improved risk stratification in patients with squamous cell carcinoma. As awareness of the test grows and clinical data accumulates, Castle Biosciences can drive increased adoption of DecisionDx-SCC. The market for SCC diagnostics is substantial, given the high incidence of this skin cancer. Successful market penetration will require demonstrating the test's ability to guide treatment decisions and improve patient outcomes.
  • Geographic Expansion: Expanding its geographic reach beyond its current market represents another growth opportunity for Castle Biosciences. By entering new markets, the company can tap into previously untapped patient populations and drive revenue growth. This may involve establishing partnerships with local distributors or building a direct sales force in new regions. Careful market analysis and strategic planning will be essential for successful geographic expansion.
  • Development of New Diagnostic Tests: Investing in the development of new diagnostic tests for other dermatological conditions or cancers represents a long-term growth opportunity for Castle Biosciences. By expanding its product portfolio, the company can diversify its revenue streams and solidify its position as a leader in molecular dermatology diagnostics. This requires ongoing research and development efforts, as well as a deep understanding of unmet clinical needs.

Competitive Advantages

  • Proprietary gene expression profiling (GEP) technology.
  • Established market position in dermatological cancer diagnostics.
  • Strong clinical data supporting the utility of their tests.
  • Direct sales force targeting physicians and healthcare providers.

Strengths

  • Proprietary diagnostic tests with strong clinical utility.
  • Established market position in dermatological cancer diagnostics.
  • High gross margin (79.9%).
  • Focus on personalized medicine and gene expression profiling.

Weaknesses

  • Negative P/E ratio (-67.05) indicating current lack of profitability.
  • Reliance on a limited number of diagnostic tests.
  • Potential for reimbursement challenges from payers.
  • Competition from larger, more established diagnostic companies.

Opportunities

  • Expansion of existing test utilization.
  • Development of new diagnostic tests for other dermatological conditions.
  • Geographic expansion into new markets.
  • Partnerships with pharmaceutical companies for companion diagnostics.

Threats

  • Changes in reimbursement policies.
  • Competition from new entrants and disruptive technologies.
  • Unfavorable clinical trial results.
  • Economic downturn affecting healthcare spending.

What CSTL Does

  • Develop and commercialize diagnostic tests for dermatological cancers.
  • Offer the DecisionDx-Melanoma test to assess metastasis risk in cutaneous melanoma patients.
  • Provide the DecisionDx-UM test for predicting metastasis risk in uveal melanoma patients.
  • Offer the DecisionDx-SCC test to predict squamous cell carcinoma metastasis risk.
  • Provide DecisionDx DiffDx-Melanoma and myPath Melanoma tests to diagnose suspicious pigmented lesions.
  • Market their tests directly to physicians and their patients.
  • Focus on personalized medicine through gene expression profiling.

Business Model

  • Develop and commercialize proprietary diagnostic tests.
  • Generate revenue through the sale of these tests to physicians and healthcare providers.
  • Focus on dermatological cancers and personalized medicine.
  • Utilize gene expression profiling technology to provide prognostic information.

Key Customers

  • Dermatologists
  • Oncologists
  • Pathologists
  • Hospitals and cancer centers
  • Patients with dermatological cancers

Competitors

  • AMN Healthcare Services (AMN): Offers healthcare staffing and workforce solutions, potentially competing for healthcare resources.
  • CareDx, Inc (CDNA): Focuses on transplant diagnostics, a different area of molecular diagnostics.
  • DarioHealth Corp. (DRIO): Focuses on digital health solutions for chronic conditions, a different market segment.
  • Embecta Corp. (EMBC): Diabetes care company, unrelated to cancer diagnostics.
  • Evolent Health, Inc. (EVH): Provides healthcare management services, not direct competitor in diagnostics.

Catalysts

  • Upcoming: Publication of new clinical data supporting the utility of DecisionDx tests.
  • Ongoing: Increasing adoption of DecisionDx-Melanoma among dermatologists and oncologists.
  • Ongoing: Expansion of the company's sales force and marketing efforts.
  • Upcoming: Potential partnerships with pharmaceutical companies for companion diagnostics.

Risks

  • Potential: Changes in reimbursement policies for diagnostic tests.
  • Potential: Competition from new entrants and disruptive technologies.
  • Potential: Unfavorable clinical trial results.
  • Ongoing: Reliance on a limited number of diagnostic tests.
  • Ongoing: Negative P/E ratio indicating current lack of profitability.

FAQ

What does Castle Biosciences, Inc. (CSTL) do?

Castle Biosciences, Inc. is a commercial-stage diagnostics company focused on providing diagnostic and prognostic testing services, primarily for dermatological cancers. Their lead product, DecisionDx-Melanoma, assesses metastasis risk in cutaneous melanoma patients.

Why does CSTL move today?

Stock prices move due to earnings, news, market sentiment, and sector trends. Check the News tab for recent developments affecting CSTL.

What are the biggest risks for CSTL?

Potential: Changes in reimbursement policies for diagnostic tests.. Potential: Competition from new entrants and disruptive technologies.

How should beginners use this page?

Start with the 1-Minute Take for a quick summary. Review Key Statistics for fundamentals. Check the News tab for recent developments. Use our Portfolio Tracker to practice without real money. Never invest more than you can afford to lose.

Disclaimer: This content is for informational purposes only and does not constitute investment advice. Always do your own research and consult a financial advisor.

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Last updated: 2026-02-21T02:03:10.779Z