Rallybio (RLYB) Stock Chart & Stock Price History $0.57 +0.01 (+1.56%) Closing price 04:00 PM EasternExtended Trading$0.56 -0.02 (-3.26%) As of 05:30 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 ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Rallybio Stock Price Performance The Rallybio (RLYB) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 48.32%, with a year-to-date return of -40.24%. In the past month, the stock has decreased 5.73%, reflecting recent market activity. As of the latest close, Rallybio traded at $0.56 with a market cap of $23.61 million and volume of 932,421 shares. 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Read our full terms of service and privacy policy. 5 Day Performance+10.56%1 Month Performance-5.73%3 Month Performance+69.73%Year-To-Date Performance-40.24%1 Year Performance-48.32% RLYB Stock Chart for Monday, October, 6, 2025 RLYB Chart by TradingView Rallybio 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 Capitalization10/03/2025$0.51$0.56+10.42%$0.60$0.54932,421 shs$23.61 million10/02/2025$0.52$0.51-1.41%$0.52$0.49376,527 shs$21.38 million10/01/2025$0.50$0.52+3.99%$0.52$0.48313,503 shs$21.69 million09/30/2025$0.56$0.50-10.41%$0.55$0.48783,564 shs$20.85 million09/29/2025$0.55$0.56+1.27%$0.58$0.55111,129 shs$23.28 million09/26/2025$0.57$0.55-2.67%$0.57$0.50741,147 shs$22.98 million09/25/2025$0.59$0.57-4.33%$0.59$0.56291,995 shs$23.62 million09/24/2025$0.59$0.59+0.78%$0.61$0.57161,034 shs$24.68 million09/23/2025$0.61$0.59-3.78%$0.64$0.58218,914 shs$24.49 million09/22/2025$0.59$0.61+3.48%$0.65$0.58546,296 shs$25.45 million Get the Latest News and Ratings for RLYB and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Rallybio and its competitors with MarketBeat's FREE daily newsletter. 09/19/2025$0.60$0.59-1.77%$0.61$0.59107,062 shs$24.60 million09/18/2025$0.57$0.60+5.40%$0.61$0.57339,971 shs$25.04 million09/17/2025$0.60$0.57-5.22%$0.60$0.57178,535 shs$25.06 million09/16/2025$0.59$0.60+1.08%$0.61$0.5872,837 shs$25.07 million09/15/2025$0.60$0.59-1.23%$0.62$0.5891,463 shs$24.80 million09/12/2025$0.59$0.60+1.56%$0.60$0.5899,112 shs$25.11 million09/11/2025$0.60$0.59-1.40%$0.61$0.59142,429 shs$24.72 million09/10/2025$0.58$0.60+2.97%$0.61$0.58220,038 shs$25.07 million09/09/2025$0.59$0.58-1.92%$0.59$0.57113,189 shs$24.35 million09/08/2025$0.61$0.59-2.38%$0.63$0.58265,502 shs$24.83 million09/05/2025$0.59$0.61+3.86%$0.62$0.58293,345 shs$25.43 million Related Companies Immunic Stock Price Chart Context Therapeutics Stock Price Chart Equillium Stock Price Chart Coeptis Therapeutics Stock Price Chart Assertio Stock Price Chart Metagenomi Stock Price Chart Applied Therapeutics Stock Price Chart Vaxart Stock Price Chart XBiotech Stock Price Chart Prelude Therapeutics Stock Price Chart Receive RLYB Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Rallybio and its competitors with MarketBeat's FREE daily newsletter. 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