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Castle Biosciences Announces Preliminary Unaudited Fourth Quarter and Full-Year 2025 Results

Castle Biosciences (CSTL) | Jan. 11, 2026

By Nina King

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Castle Biosciences, Inc. (Nasdaq: CSTL) announced unaudited preliminary performance results for Q4 and full-year 2025.

Q4 2025 total revenue expected to exceed $340 million.

Year-end 2025 cash, cash equivalents, and marketable investment securities expected to be approximately $300 million.

Total Revenue Exceeds Expectations

2025 total revenue projected to surpass $340 million, exceeding the guided range of $327-335 million.

Core Revenue Drivers Growth

Total test reports for core revenue drivers (DecisionDx-Melanoma, TissueCypher) up by 37% in 2025 compared to 2024.

New Test Launch Success

AdvanceAD-Tx™ new test launched in Nov. 2025 showing strong adoption with over 50% of granted clinician offices ordering within the first five weeks.

  • Strong Q4 and full-year 2025 results indicate successful execution and leadership in dermatologic and gastrointestinal franchises.
  • Company positioned well with a strong balance sheet to capitalize on growth opportunities in 2026.
  • Limited access launch of AdvanceAD-Tx™ expands the total addressable market for Castle Biosciences.

Castle Biosciences achieved remarkable results in Q4 and full-year 2025, showcasing growth and innovation in their test portfolio. Their strong position and successful launches set the stage for continued success in 2026 and beyond.