Overview

Founded in 2008, Castle Biosciences is a leading molecular diagnostics company focused on improving health through innovative tests that guide patient care. Our corporate headquarters is in Friendswood, Texas with laboratory facilities located in Phoenix, Arizona and Pittsburgh, Pennsylvania.

Realizing a large unmet clinical need in disease management, we continuously strive to evolve and improve, challenging the status quo with scientific expertise, valuable insights and robust data development.

Our innovative portfolio of commercial and pipeline tests targets unmet clinical need along the patient care continuum. We currently market six proprietary tests designed to answer clinical questions and address treatment plan challenges facing clinicians, with a primary focus in dermatologic, including our recently launched AdvanceAD-Tx™ test, and gastroenterological disease.

Our two tests that currently represent our core revenue drivers are 1) DecisionDx®-Melanoma test for invasive cutaneous melanoma, which is a proprietary gene expression profile (GEP) test that uses an individual patient’s tumor biology to predict the risk of metastasis or recurrence, as well as the risk of sentinel lymph node positivity, independent of traditional staging factors, and 2) TissueCypher® Barrett’s Esophagus test, designed to predict future development of esophageal cancer in patients with Barrett’s esophagus, the only known risk factor for the development of esophageal cancer.

DecisionDx®-SCC is our GEP test that predicts the risk of metastasis in high-risk squamous cell carcinoma patients and predicts which patients are most likely to benefit from adjuvant radiation therapy. DecisionDx®-UM, the standard of care in uveal melanoma staging, is our GEP test that predicts the risk of metastasis for patients with uveal melanoma, a rare eye cancer. MyPath® Melanoma provides a highly accurate, objective result to aid dermatopathologists and dermatologists in characterizing suspicious pigmented lesions. AdvanceAD-Tx™ is our 487-GEP test designed to guide systemic treatment decision making in patients ages 12 and older with moderate-to-severe atopic dermatitis, addressing a major unmet need by providing a personalized approach, helping physicians match patients to the right treatment class and avoid the trial-and-error process.

Additionally, we have active research and development programs for tests in these and other diseases with high unmet clinical need, including ongoing initiatives to increase both our current dermatologic and gastrointestinal offerings. We also look to put the strength of our balance sheet to work through a disciplined and strategic approach to capital deployment, focusing on creating stockholder value.



Learn more about Castle Biosciences' mission to empower patients and healthcare providers by combining innovation, advanced technologies, and relevant real-world evidence to address critical unmet clinical needs and improve health outcomes.

This behind-the-scenes video offers an inside look at Castle Biosciences' TissueCypher testing process, showcasing how advanced imaging, multiplexed biomarker staining, and AI-driven analysis are utilized to assess a patient's risk of progression from Barrett’s esophagus to esophageal cancer.

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Annual Report

2024 was another year of strength for Castle. Fueled by our steadfast commitment to improving patient care, we navigated a dynamic reimbursement and regulatory landscape while delivering exceptional performance results for our stockholders. Our team's unwavering passion and collaborative spirit were instrumental in driving us forward, underscoring our strong, people-first mindset which defines our culture and powers our organization.

Continuing our track record of strong and consistent financial performance, we delivered 96,071 total test reports in 2024, an increase of 36% compared to 2023, and full-year revenue of $332 million, representing 51% growth over 2023. Importantly, we believe these exceptional results reflect the growing adoption of our tests among healthcare providers due to the meaningful impact we are making in the lives of patients through our tests that can help improve treatment pathway decisions and, ultimately, outcomes. Download PDF