IO Biotech (IOBT) Stock Chart & Stock Price History $1.74 -0.03 (-1.69%) Closing price 04:00 PM EasternExtended Trading$1.76 +0.02 (+1.15%) As of 07:54 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 TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock IO Biotech Stock Price Performance The IO Biotech (IOBT) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 8.75%, with a year-to-date return of 89.13%. In the past month, the stock has decreased 10.77%, reflecting recent market activity. As of the latest close, IO Biotech traded at $1.77 with a market cap of $135.06 million and volume of 1.19 million shares. 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Email Address 5 Day Performance-19.44%1 Month Performance-10.77%3 Month Performance+45.00%Year-To-Date Performance+89.13%1 Year Performance+8.75% IOBT Stock Chart for Friday, August, 22, 2025 IOBT Chart by TradingView IO Biotech 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 Capitalization08/22/2025$1.77$1.74-1.69%$1.88$1.721.45 million shs$123.86 million08/21/2025$1.88$1.77-5.85%$1.94$1.751.19 million shs$135.06 million08/20/2025$2.05$1.88-8.29%$2.06$1.862.01 million shs$123.85 million08/19/2025$2.09$2.05-1.91%$2.43$1.962.75 million shs$142.30 million08/18/2025$2.16$2.09-3.24%$2.79$2.0513.67 million shs$142.30 million08/15/2025$1.28$2.16+68.75%$2.21$1.3337.55 million shs$86.30 million08/14/2025$1.31$1.28-2.29%$1.41$1.232.85 million shs$84.33 million08/13/2025$1.31$1.31$1.37$1.222.51 million shs$69.18 million08/12/2025$1.05$1.31+24.76%$1.57$1.0619.96 million shs$119.24 million08/11/2025$1.81$1.05-41.99%$2.04$0.9882.54 million shs$69.17 million Get the Latest News and Ratings for IOBT and Related StocksEnter your email address below to receive the latest news and analysts' ratings for IO Biotech and its competitors with MarketBeat's FREE daily newsletter. 08/08/2025$1.89$1.81-4.23%$2.03$1.80358,055 shs$119.24 million08/07/2025$1.96$1.89-3.57%$2.05$1.82360,662 shs$141.64 million08/06/2025$2.15$1.96-8.84%$2.20$1.95288,342 shs$141.64 million08/05/2025$2.15$2.15$2.20$2.09180,365 shs$141.64 million08/04/2025$2.22$2.15-3.15%$2.20$2.06406,020 shs$146.26 million08/01/2025$2.23$2.22-0.45%$2.25$2.10192,302 shs$146.25 million07/31/2025$2.12$2.23+5.19%$2.27$2.06491,302 shs$146.91 million07/30/2025$2.19$2.12-3.20%$2.35$2.10331,015 shs$139.67 million07/29/2025$2.40$2.19-8.75%$2.38$2.18868,679 shs$144.28 million07/28/2025$2.06$2.40+16.50%$2.48$2.062.18 million shs$158.11 million07/25/2025$1.93$2.06+6.74%$2.08$1.91404,943 shs$135.71 million07/24/2025$1.93$1.93$2.15$1.911.01 million shs$127.15 million07/23/2025$1.95$1.93-1.03%$2.00$1.92336,628 shs$127.15 million07/22/2025$2.02$1.95-3.47%$2.04$1.88251,219 shs$128.47 million07/21/2025$2.05$2.02-1.46%$2.24$2.00388,668 shs$133.08 million Related Companies Rezolute Stock Chart AnaptysBio Stock Chart Kodiak Sciences Stock Chart Xencor Stock Chart Sage Therapeutics Stock Chart Rapport Therapeutics Stock Chart SNDL Stock Chart Zevra Therapeutics Stock Chart Arcturus Therapeutics Stock Chart Savara Stock Chart Receive IOBT Stock News and Ratings via EmailSign-up to receive the latest news and ratings for IO Biotech and its competitors with MarketBeat's FREE daily newsletter. 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