Upstream Bio (UPB) Stock Chart & Stock Price History $6.81 -0.03 (-0.44%) Closing price 03/27/2025 04:00 PM EasternExtended Trading$6.80 0.00 (-0.07%) As of 03/27/2025 04:24 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOwnershipSEC FilingsTrendsBuy This Stock Upstream Bio Stock Price Performance 5 Day Performance-10.63%1 Month Performance-12.80%3 Month Performance-64.51%Year-To-Date Performance-58.58% Receive UPB Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Upstream Bio and its competitors with MarketBeat's FREE daily newsletter. Email Address UPB Stock Chart for Friday, March, 28, 2025 UPB Chart by TradingViewRemove Ads Upstream Bio Stock Price History Daily Weekly Monthly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year Time Frame * Start Date * End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization03/27/2025$6.84$6.81-0.44%$7.25$6.63340,069 shs$365.30 million03/26/2025$7.63$6.84-10.35%$7.88$6.64424,933 shs$366.90 million03/25/2025$7.70$7.63-0.91%$7.85$7.42118,134 shs$409.28 million03/24/2025$7.62$7.70+1.05%$7.84$7.37126,481 shs$413.04 million03/21/2025$8.05$7.62-5.34%$7.96$7.48742,304 shs$408.74 million03/20/2025$8.55$8.05-5.85%$8.62$7.99267,104 shs$431.81 million03/19/2025$9.04$8.55-5.42%$9.48$8.2086,792 shs$458.63 million03/18/2025$9.87$9.04-8.41%$9.70$8.99135,964 shs$484.92 million03/17/2025$9.61$9.87+2.71%$10.08$9.28136,834 shs$529.44 million03/14/2025$9.06$9.61+6.07%$9.62$9.03134,426 shs$515.07 million Get the Latest News and Ratings for UPB and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Upstream Bio and its competitors with MarketBeat's FREE daily newsletter. 03/13/2025$9.23$9.06-1.84%$9.36$8.62238,644 shs$485.59 million03/12/2025$8.56$9.23+7.83%$9.42$8.19252,493 shs$494.70 million03/11/2025$8.39$8.56+2.03%$8.64$7.94209,830 shs$458.79 million03/10/2025$8.94$8.39-6.15%$9.10$8.18157,647 shs$449.68 million03/07/2025$8.42$8.94+6.18%$9.29$8.18337,516 shs$479.16 million03/06/2025$8.47$8.42-0.59%$8.59$7.96278,706 shs$451.29 million03/05/2025$8.34$8.47+1.56%$8.58$7.94273,305 shs$453.97 million03/04/2025$7.46$8.34+11.80%$8.44$6.67211,485 shs$447.00 million03/03/2025$7.93$7.46-5.93%$8.03$7.20231,964 shs$399.83 million02/28/2025$7.81$7.93+1.54%$8.30$7.71192,920 shs$425.02 million02/27/2025$7.66$7.81+1.96%$7.99$7.33237,868 shs$418.59 million02/26/2025$7.73$7.66-0.91%$8.33$7.47235,061 shs$410.55 million Related Companies CGON Stock Price Chart HRMY Stock Price Chart ARQT Stock Price Chart JANX Stock Price Chart TVTX Stock Price Chart AGIO Stock Price Chart TARS Stock Price Chart APGE Stock Price Chart VERA Stock Price Chart IRON Stock Price Chart Receive UPB Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Upstream Bio and its competitors with MarketBeat's FREE daily newsletter. 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