Castle Biosciences (CSTL) Stock Chart & Stock Price History $22.28 +0.93 (+4.36%) Closing price 08/27/2025 04:00 PM EasternExtended Trading$22.38 +0.09 (+0.43%) As of 08/27/2025 07:06 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Castle Biosciences Stock Price Performance The Castle Biosciences (CSTL) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 22.18%, with a year-to-date return of -16.40%. In the past month, the stock has increased 36.44%, reflecting recent market activity. As of the latest close, Castle Biosciences traded at $22.28 with a market cap of $646.34 million and volume of 839,158 shares. Five years ago, the stock traded at $45.56, representing a 51.10% decrease over that period. At the time, it had a market cap of $902.62 million and a volume of 291,090 shares. Receive CSTL Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Castle Biosciences and its competitors with MarketBeat's FREE daily newsletter. Subscribe Now View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. 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Read our full terms of service and privacy policy. 5 Day Performance+6.91%1 Month Performance+36.44%3 Month Performance+37.28%Year-To-Date Performance-16.40%1 Year Performance-22.18%5 Year Performance-51.10% CSTL Stock Chart for Thursday, August, 28, 2025 CSTL Chart by TradingView Castle Biosciences Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization08/27/2025$21.35$22.28+4.36%$22.35$21.24839,158 shs$646.34 million08/26/2025$20.57$21.35+3.79%$21.65$20.35490,603 shs$619.32 million08/25/2025$20.84$20.57-1.30%$21.03$20.51281,230 shs$596.74 million08/22/2025$19.97$20.84+4.36%$21.03$20.00354,984 shs$604.57 million08/21/2025$19.78$19.97+0.96%$20.22$19.59227,339 shs$579.33 million08/20/2025$19.90$19.78-0.60%$20.16$19.23343,215 shs$573.78 million08/19/2025$20.56$19.90-3.21%$20.80$19.80603,517 shs$577.30 million08/18/2025$20.09$20.56+2.34%$20.67$20.01360,777 shs$596.45 million08/15/2025$19.82$20.09+1.36%$20.21$19.45716,674 shs$582.81 million08/14/2025$19.41$19.82+2.11%$19.96$18.99646,170 shs$574.98 million Get the Latest News and Ratings for CSTL and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Castle Biosciences and its competitors with MarketBeat's FREE daily newsletter. 08/13/2025$19.34$19.41+0.36%$19.92$19.242.39 million shs$563.05 million08/12/2025$19.16$19.34+0.94%$19.66$18.96475,197 shs$561.05 million08/11/2025$19.36$19.16-1.03%$19.60$19.00452,856 shs$555.83 million08/08/2025$19.65$19.36-1.48%$20.17$19.27536,830 shs$561.63 million08/07/2025$19.76$19.65-0.56%$19.80$18.81738,044 shs$570.01 million08/06/2025$20.35$19.76-2.90%$20.76$19.141.27 million shs$570.47 million08/05/2025$15.32$20.35+32.83%$21.33$18.682.02 million shs$587.50 million08/04/2025$14.65$15.32+4.57%$15.41$14.59855,624 shs$442.32 million08/01/2025$15.15$14.65-3.30%$15.16$14.61421,590 shs$422.98 million07/31/2025$16.08$15.15-5.78%$16.20$15.11455,575 shs$437.38 million07/30/2025$16.23$16.08-0.92%$16.67$16.01346,190 shs$464.23 million07/29/2025$16.33$16.23-0.61%$16.34$16.01325,653 shs$468.59 million07/28/2025$16.07$16.33+1.62%$16.65$16.10330,865 shs$471.45 million Related Companies Addus HomeCare Stock Price Chart LifeStance Health Group Stock Price Chart Celcuity Stock Price Chart Progyny Stock Price Chart Ardent Health Stock Price Chart PACS Group Stock Price Chart National HealthCare Stock Price Chart Viridian Therapeutics Stock Price Chart Aveanna Healthcare Stock Price Chart Teladoc Health Stock Price Chart Receive CSTL Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Castle Biosciences and its competitors with MarketBeat's FREE daily newsletter. 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