Generation Bio (GBIO) Stock Chart & Stock Price History $0.30 -0.05 (-15.40%) Closing price 06/27/2025 04:00 PM EasternExtended Trading$0.36 +0.06 (+18.51%) As of 06/27/2025 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 ForecastsChartCompetitorsEarningsHeadlinesInsider 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 89.35%, with a year-to-date return of -71.66%. In the past month, the stock has decreased 19.70%, reflecting recent market activity. As of the latest close, Generation Bio traded at $0.30 with a market cap of $20.14 million and volume of 7.36 million shares. Five years ago, the stock traded at $21.71, representing a 98.62% decrease over that period. At the time, it had a market cap of $974.81 million and a volume of 96,500 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-17.63%1 Month Performance-19.70%3 Month Performance-29.78%Year-To-Date Performance-71.66%1 Year Performance-89.35%5 Year Performance-98.62% GBIO Stock Chart for Monday, June, 30, 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 Capitalization06/27/2025$0.36$0.30-15.40%$0.37$0.307.36 million shs$20.14 million06/26/2025$0.36$0.36-2.63%$0.37$0.35372,273 shs$23.81 million06/25/2025$0.37$0.36-1.51%$0.38$0.35601,622 shs$24.45 million06/24/2025$0.36$0.37+2.89%$0.38$0.36527,297 shs$24.82 million06/23/2025$0.38$0.36-5.29%$0.38$0.35370,247 shs$24.13 million06/20/2025$0.36$0.38+5.56%$0.39$0.36522,654 shs$25.48 million06/19/2025$0.36$0.36$0.39$0.351.11 million shs$24.13 million06/18/2025$0.38$0.36-5.76%$0.39$0.351.11 million shs$24.13 million06/17/2025$0.40$0.38-4.02%$0.41$0.38289,691 shs$25.61 million06/16/2025$0.37$0.40+7.83%$0.40$0.37356,283 shs$26.68 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. 06/13/2025$0.38$0.37-3.63%$0.39$0.37333,699 shs$24.74 million06/12/2025$0.39$0.38-2.05%$0.41$0.38361,774 shs$25.67 million06/11/2025$0.43$0.39-8.02%$0.43$0.39433,057 shs$26.21 million06/10/2025$0.40$0.43+6.81%$0.45$0.41682,051 shs$28.50 million06/09/2025$0.44$0.40-8.72%$0.42$0.39782,193 shs$26.68 million06/06/2025$0.37$0.44+19.26%$0.44$0.361.70 million shs$29.23 million06/05/2025$0.39$0.37-5.63%$0.39$0.36669,626 shs$24.51 million06/04/2025$0.40$0.39-2.86%$0.41$0.38552,964 shs$25.97 million06/03/2025$0.38$0.40+3.72%$0.41$0.37518,044 shs$26.73 million06/02/2025$0.37$0.38+2.78%$0.40$0.38774,093 shs$25.78 million05/30/2025$0.39$0.37-3.63%$0.39$0.37294,477 shs$25.08 million05/29/2025$0.37$0.39+5.89%$0.41$0.37682,077 shs$26.02 million Related Companies QNTM Stock Price Chart CCCC Stock Price Chart CRBP Stock Price Chart OPTN Stock Price Chart FBRX Stock Price Chart SAVA Stock Price Chart TNYA Stock Price Chart VIRI Stock Price Chart ZNTL Stock Price Chart HLVX 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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