Generation Bio (GBIO) Stock Chart & Stock Price History $4.15 -0.13 (-3.04%) Closing price 08/7/2025 04:00 PM EasternExtended Trading$4.20 +0.04 (+1.08%) As of 08/7/2025 07:55 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 EventsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Generation Bio Stock Price Performance The Generation Bio (GBIO) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 82.71%, with a year-to-date return of -60.85%. In the past month, the stock has increased 17.60%, reflecting recent market activity. As of the latest close, Generation Bio traded at $4.15 with a market cap of $27.82 million and volume of 53,283 shares. Five years ago, the stock traded at a split-adjusted price of $202.50, representing a 97.95% decrease over that period. At the time, it had a market cap of $928.30 million and a volume of 3,874 shares. Receive GBIO Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Generation Bio and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance-1.43%1 Month Performance+17.60%3 Month Performance+13.39%Year-To-Date Performance-60.85%1 Year Performance-82.71%5 Year Performance-97.95% GBIO Stock Chart for Friday, August, 8, 2025 GBIO Chart by TradingView Generation Bio 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 Capitalization08/07/2025$4.28$4.15-3.04%$4.29$4.1453,283 shs$27.82 million08/06/2025$4.56$4.28-6.14%$4.57$4.2827,857 shs$28.68 million08/05/2025$4.58$4.56-0.44%$4.83$4.4956,009 shs$30.55 million08/04/2025$4.21$4.58+8.79%$4.63$4.25106,370 shs$30.70 million08/01/2025$4.44$4.21-5.18%$4.40$4.11143,807 shs$28.22 million07/31/2025$4.51$4.44-1.55%$4.52$4.3379,601 shs$29.75 million07/30/2025$4.41$4.51+2.27%$4.64$4.2298,104 shs$30.22 million07/29/2025$4.70$4.41-6.17%$4.90$4.28145,660 shs$29.56 million07/28/2025$4.61$4.70+1.95%$5.10$4.61195,852 shs$31.49 million07/25/2025$4.20$4.61+9.76%$4.80$4.15179,814 shs$30.89 million Get the Latest News and Ratings for GBIO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Generation Bio and its competitors with MarketBeat's FREE daily newsletter. 07/24/2025$4.33$4.20-3.00%$4.61$4.05359,980 shs$28.14 million07/23/2025$4.27$4.33+1.41%$5.00$4.14273,104 shs$290.26 million07/22/2025$4.21$4.27+1.43%$4.44$3.88282,142 shs$286.26 million07/21/2025$4.06$4.21+3.62%$4.29$4.00176,819 shs$28.22 million07/18/2025$5.21$4.06-22.08%$4.50$3.81456,537 shs$27.24 million07/17/2025$5.65$5.21-7.72%$5.78$5.02190,691 shs$34.96 million07/16/2025$4.26$5.65+32.63%$5.90$4.40962,724 shs$37.88 million07/15/2025$4.40$4.26-3.18%$4.60$4.06108,442 shs$28.56 million07/14/2025$3.86$4.40+13.87%$4.50$3.94199,989 shs$29.50 million07/11/2025$3.73$3.86+3.62%$4.00$3.74109,055 shs$25.90 million07/10/2025$3.78$3.73-1.45%$3.80$3.6557,826 shs$25.00 million07/09/2025$3.53$3.78+7.23%$3.80$3.50107,636 shs$25.37 million07/08/2025$3.30$3.53+6.94%$3.56$3.3083,179 shs$23.66 million07/07/2025$3.48$3.30-5.17%$3.43$3.2250,787 shs$22.12 million Related Companies CNTB Stock Price Chart ALTS Stock Price Chart TNYA Stock Price Chart ATOS Stock Price Chart SKYE Stock Price Chart HURA Stock Price Chart ZURA Stock Price Chart SAVA Stock Price Chart HLVX Stock Price Chart COYA Stock Price Chart Receive GBIO Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Generation Bio and its competitors with MarketBeat's FREE daily newsletter. 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