Castle Biosciences, Inc. (CSTL) Stock Chart
CSTL price chart
Daily prices adjusted for splits and dividends. 1D and 5D show delayed intraday prices. Markers: E earnings, D dividend, S split.
Technical snapshot
Key levels & statistics
CSTL performance vs the market
Total return, dividends reinvestedCSTL monthly returns
CSTL historical prices
CSTL dividends & splits
About the CSTL chart
Castle Biosciences (CSTL) closed at $31.96 on October 16, 2026, down 17.8% so far this year. The stock is trading 11.1% above its 200-day moving average of $28.78, which technical analysts usually read as a long-term uptrend. Over the past year CSTL returned +41.9% including dividends, ahead of the S&P 500 (+16.8%).
This page charts the full trading history of Castle Biosciences, Inc. stock. Daily prices come from EODHD and are adjusted for stock splits and dividends, so returns over long periods are comparable. For the latest quote, company profile, earnings and news, see the CSTL stock overview.
CSTL chart FAQ
What is Castle Biosciences's all-time high stock price?
The highest closing price for CSTL was $97.33 on February 9, 2021 (adjusted for stock splits). As of the October 16, 2026 close it traded 67.2% below that level.
What is the 52-week range of CSTL stock?
Over the 52 weeks to October 16, 2026, CSTL traded between an intraday low of $17.72 on May 14, 2026 and an intraday high of $44.28 on January 26, 2026.
Is CSTL above its 200-day moving average?
Yes. On October 16, 2026 CSTL closed at $31.96, 11.1% above its 200-day simple moving average of $28.78. The 50-day average was $33.54.
How has CSTL stock performed compared with the S&P 500?
Including reinvested dividends, CSTL returned +41.9% over the past year, compared with +16.8% for the S&P 500 (SPY). Over five years the figures were −49.7% and +83.0%.
Does Castle Biosciences pay a dividend?
Castle Biosciences has not paid a dividend in the past 12 months.
How do I read the CSTL chart?
Pick a time range above the chart and choose candlesticks, a line or an area chart. Moving averages, Bollinger Bands, volume, RSI and MACD can be switched on with the indicator buttons, and "Compare" plots CSTL against the S&P 500, its sector or a competitor as a percentage change. Chart prices are adjusted for splits and dividends.