$CSTL

CASTLE BIOSCIENCES INC

Castle Biosciences is a molecular diagnostics company that offers tests to help clinicians diagnose and treat dermatologic cancers, Barrett’s esophagus, uveal melanoma and atopic dermatitis. Its portfolio includes DecisionDx-Melanoma and DecisionDx-SCC for skin cancers, MyPath Melanoma for difficult-to-diagnose melanocytic lesions, TissueCypher for risk stratification in Barrett’s esophagus, DecisionDx-UM for uveal melanoma, and AdvanceAD-Tx to guide systemic treatment selection for people aged 12 years and older with moderate-to-severe atopic dermatitis. The company discontinued its IDgenetix test in May 2025. Castle Biosciences earns money primarily through reimbursement from government and commercial third-party payors, and bills payors and patients for tests performed. Its sales and marketing efforts focus mainly on U.S. dermatology and gastroenterology markets. The company operates laboratories in Phoenix, Arizona, and Pittsburgh, Pennsylvania.

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MAETZOLD DEREK J
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Castle Biosciences presents melanoma test data at conferences

Castle Biosciences (CSTL) will present data on its DecisionDx-Melanoma test at two medical conferences. Studies linked test results to survival outcomes, showing significant differences in survival rates based on risk classifications. The test has been ordered over 260,000 times since launch.

DecisionDx®-Melanoma Data at SDPA and Dermato-Onco2026 Support the Test's Ability to Refine Risk Assessment Beyond AJCC Staging

Castle Biosciences presented data on DecisionDx-Melanoma at SDPA and Dermato-Onco2026, showing the test can identify higher-risk patients with thin melanomas and provide individualized five-year recurrence-risk estimates. The studies suggest the test refines risk assessment beyond AJCC staging, aiding personalized care. According to the company, the test has been ordered over 260,000 times and is supported by extensive research.

CSTL sentiment & insider activity

Over the past 7 days, AlphAI's AI scored 3 news stories mentioning CSTL (CASTLE BIOSCIENCES INC). Coverage has skewed bullish: 2 bullish, 1 neutral, and 0 bearish.

Recent CSTL coverage spans technology, financial news and earnings.

In the last 30 days, CSTL insiders filed 14 SEC Form 4 transactions — no purchases and 14 sales ($1.5M). The most active reporter was MAETZOLD DEREK J, Pres. & Chief Exec. Officer, with 9 filings. 100% of those filings were made under pre-arranged Rule 10b5-1 plans.

What's driving CSTL

AlphAI scores every news story that mentions CSTL with an AI model for sentiment and relevance, and aggregates insider trades from CASTLE BIOSCIENCES INC's SEC EDGAR Form 4 filings. Figures refresh continuously.

News on $CSTL

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DecisionDx®-Melanoma Data at SDPA and Dermato-Onco2026 Support the Test's Ability to Refine Risk Assessment Beyond AJCC Staging

Castle Biosciences presented data on DecisionDx-Melanoma at SDPA and Dermato-Onco2026, showing the test can identify higher-risk patients with thin melanomas and provide individualized five-year recurrence-risk estimates. The studies suggest the test refines risk assessment beyond AJCC staging, aiding personalized care. According to the company, the test has been ordered over 260,000 times and is supported by extensive research.

Castle Bio (CSTL) Q3 2026 Earnings Call Transcript

Castle Bio (CSTL) reported Q3 2026 revenue of $102.9M, up 24% YoY, driven by 47% growth in TissueCypher test volume. Net cash from operations was $19.7M, with $278M in cash and equivalents. The company raised full-year revenue guidance to $385M-$395M, up from $365M-$375M. DecisionDx-Melanoma saw 5% YoY growth, while TissueCypher is expected to grow 50%-52% for the year.

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Castle Biosciences Reports Third Quarter 2026 Results

Castle Biosciences reported Q3 2026 revenue of $102.9M, up 24% YoY. TissueCypher test volume rose 47% YoY. The company raised full-year 2026 revenue guidance to $385-395M. Q3 net loss was $4.1M, with Adjusted EBITDA of $12.7M. The company presented new data on its DecisionDx-Melanoma test at EADV Congress 2026.

Castle Biosciences presents Barrett’s esophagus test data at ACG

Castle Biosciences presented data on its Barrett’s esophagus test at the American College of Gastroenterology 2026 meeting. The studies showed the test's ability to predict disease progression and influence treatment decisions. According to the company, the test classified 83% of patients as low risk, differing from traditional methods. The data was presented in three studies, including two case reports and one multi-center study.

Late-Breaking EADV 2026 Data Support Use of DecisionDx®-Melanoma in SLNB Decision-Making and Risk-Aligned Post Surgical Management

Castle Biosciences presented data at EADV 2026 showing DecisionDx-Melanoma's ability to predict low SLN positivity and high recurrence risk in melanoma patients. The study involved 2,799 patients across 29 U.S. centers, with low-risk patients avoiding SLNB showing 99.6% five-year RFS. The test also stratified recurrence risk in early-stage, transected melanomas, supporting tailored surveillance. Castle Biosciences is a Nasdaq-listed company (CSTL).

JAAD Publication Shows Improved Performance of DecisionDx®-SCC

Castle Biosciences (CSTL) announced a study published in the Journal of the American Academy of Dermatology validating its DecisionDx-SCC test for high-risk cutaneous squamous cell carcinoma. The test integrates molecular data with clinicopathologic risk factors, demonstrating a 97.3% negative predictive value for low-risk patients and identifying those likely to benefit from adjuvant radiation therapy. The study involved 572 patients and showed the test's ability to stratify metastatic and loca

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