Castle Biosciences (CSTL) Stock Chart & Stock Price History $19.63 -0.72 (-3.55%) As of 01:34 PM Eastern This is a fair market value 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 21.18%, with a year-to-date return of -26.35%. In the past month, the stock has decreased 3.24%, reflecting recent market activity. As of the latest close, Castle Biosciences traded at $20.35 with a market cap of $587.50 million and volume of 2.02 million shares. Five years ago, the stock traded at $41.65, representing a 52.88% decrease over that period. At the time, it had a market cap of $712.22 million and a volume of 94,658 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. Email Address 5 Day Performance+33.97%1 Month Performance-3.24%3 Month Performance+18.09%Year-To-Date Performance-26.35%1 Year Performance-21.18%5 Year Performance-52.88% CSTL Stock Chart for Wednesday, August, 6, 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 Capitalization08/05/2025$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 million07/25/2025$16.43$16.07-2.19%$16.57$16.00288,409 shs$463.94 million07/24/2025$16.80$16.43-2.20%$16.82$16.34308,618 shs$474.33 million07/23/2025$16.32$16.80+2.94%$17.31$16.47399,235 shs$485.05 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. 07/22/2025$16.72$16.32-2.39%$16.93$16.16457,398 shs$471.16 million07/21/2025$16.54$16.72+1.09%$16.95$16.25543,371 shs$482.71 million07/18/2025$17.39$16.54-4.89%$17.72$16.41463,655 shs$477.51 million07/17/2025$18.68$17.39-6.91%$18.92$17.32482,351 shs$502.05 million07/16/2025$18.87$18.68-1.01%$19.16$18.36256,726 shs$539.33 million07/15/2025$19.50$18.87-3.23%$19.70$18.65300,475 shs$544.78 million07/14/2025$19.66$19.50-0.81%$19.82$19.31231,094 shs$562.97 million07/11/2025$19.84$19.66-0.91%$19.90$19.29284,050 shs$567.58 million07/10/2025$20.12$19.84-1.39%$20.26$19.68282,935 shs$572.82 million07/09/2025$19.76$20.12+1.82%$20.22$19.57415,214 shs$580.86 million07/08/2025$19.46$19.76+1.54%$19.86$19.21400,644 shs$570.47 million07/07/2025$20.29$19.46-4.07%$20.32$19.44576,172 shs$561.81 million Related Companies PACS Group Stock Price Chart Celcuity Stock Price Chart LifeStance Health Group Stock Price Chart National HealthCare Stock Price Chart Ardent Health Stock Price Chart Viridian Therapeutics Stock Price Chart Teladoc Health Stock Price Chart AdaptHealth Stock Price Chart GRAIL Stock Price Chart The Pennant Group 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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