Ionis Pharmaceuticals (IONS) Stock Chart & Stock Price History $33.79 -0.68 (-1.97%) As of 01:02 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Ionis Pharmaceuticals Stock Price Performance The Ionis Pharmaceuticals (IONS) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 9.59%, with a year-to-date return of -3.36%. In the past month, the stock has increased 18.50%, reflecting recent market activity. As of the latest close, Ionis Pharmaceuticals traded at $34.47 with a market cap of $5.49 billion and volume of 1.17 million shares. Five years ago, the stock traded at $54.30, representing a 37.78% decrease over that period. At the time, it had a market cap of $7.45 billion and a volume of 521,275 shares. Receive IONS Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Ionis Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance+0.67%1 Month Performance+18.50%3 Month Performance+4.51%Year-To-Date Performance-3.36%1 Year Performance-9.59%5 Year Performance-37.78% IONS Stock Chart for Wednesday, May, 21, 2025 IONS Chart by TradingView Ionis Pharmaceuticals 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 Capitalization05/20/2025$34.03$34.47+1.29%$34.71$33.721.17 million shs$5.49 billion05/19/2025$33.56$34.03+1.40%$34.38$33.20811,293 shs$5.42 billion05/16/2025$32.99$33.56+1.73%$33.66$32.71893,963 shs$5.34 billion05/15/2025$32.60$32.99+1.20%$33.00$32.131.11 million shs$5.25 billion05/14/2025$32.53$32.60+0.22%$33.20$32.29693,256 shs$5.19 billion05/13/2025$33.53$32.53-2.98%$33.82$32.381.36 million shs$5.18 billion05/12/2025$32.26$33.53+3.94%$33.94$32.601.44 million shs$5.34 billion05/09/2025$32.75$32.26-1.50%$33.64$32.26946,934 shs$5.13 billion05/08/2025$33.07$32.75-0.97%$33.33$31.661.92 million shs$5.21 billion05/07/2025$31.86$33.07+3.80%$33.36$31.702.16 million shs$5.26 billion Get the Latest News and Ratings for IONS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Ionis Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 05/06/2025$33.65$31.86-5.32%$33.67$31.801.96 million shs$5.06 billion05/05/2025$32.78$33.65+2.65%$33.98$32.972.00 million shs$5.35 billion05/02/2025$31.71$32.78+3.37%$33.20$32.011.89 million shs$5.21 billion05/01/2025$30.71$31.71+3.26%$32.20$30.012.69 million shs$5.04 billion04/30/2025$29.81$30.71+3.02%$31.82$29.852.40 million shs$4.88 billion04/29/2025$29.74$29.81+0.24%$30.21$29.421.69 million shs$4.74 billion04/28/2025$29.70$29.74+0.13%$30.09$29.481.65 million shs$4.73 billion04/25/2025$29.57$29.70+0.44%$29.90$28.871.02 million shs$4.72 billion04/24/2025$29.10$29.57+1.62%$29.78$28.791.80 million shs$4.70 billion04/23/2025$29.03$29.10+0.24%$30.12$29.071.09 million shs$4.63 billion04/22/2025$28.51$29.03+1.82%$29.31$28.461.20 million shs$4.61 billion04/21/2025$28.40$28.51+0.39%$29.06$27.90950,543 shs$4.53 billion Related Companies BIIB Stock Chart UTHR Stock Chart NBIX Stock Chart INCY Stock Chart BMRN Stock Chart EXEL Stock Chart EXAS Stock Chart HALO Stock Chart RGEN Stock Chart MDGL Stock Chart Receive IONS Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Ionis Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 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