Cyclerion Therapeutics (CYCN) Stock Chart & Stock Price History $2.52 -0.05 (-1.75%) Closing price 08/29/2025 03:58 PM EasternExtended Trading$2.46 -0.07 (-2.77%) As of 08/29/2025 04:10 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 AnalysisChartCompetitorsEarningsInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Cyclerion Therapeutics Stock Price Performance The Cyclerion Therapeutics (CYCN) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 6.83%, with a year-to-date return of -21.58%. In the past month, the stock has decreased 4.36%, reflecting recent market activity. As of the latest close, Cyclerion Therapeutics traded at $2.53 with a market cap of $8.43 million and volume of 8,061 shares. Five years ago, the stock traded at a split-adjusted price of $133.80, representing a 98.11% decrease over that period. At the time, it had a market cap of $227.60 million and a volume of 9,006 shares. Receive CYCN Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Cyclerion Therapeutics and its competitors with MarketBeat's FREE daily newsletter. Subscribe Now View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. 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Read our full terms of service and privacy policy. 5 Day Performance-0.98%1 Month Performance-4.36%3 Month Performance-14.41%Year-To-Date Performance-21.58%1 Year Performance-6.83%5 Year Performance-98.11% CYCN Stock Chart for Saturday, August, 30, 2025 CYCN Chart by TradingView Cyclerion Therapeutics 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 Capitalization08/29/2025$2.57$2.53-1.75%$2.72$2.458,061 shs$8.43 million08/28/2025$2.57$2.57$2.74$2.5065,277 shs$8.58 million08/27/2025$2.76$2.57-6.88%$2.88$2.4536,616 shs$8.58 million08/26/2025$2.55$2.76+8.24%$2.90$2.6151,561 shs$9.21 million08/25/2025$2.49$2.55+2.57%$2.59$2.3412,816 shs$8.52 million08/22/2025$2.38$2.49+4.45%$2.55$2.339,342 shs$8.30 million08/21/2025$2.38$2.38$2.52$2.3318,540 shs$7.95 million08/20/2025$2.34$2.38+1.71%$2.40$2.309,902 shs$7.95 million08/19/2025$2.54$2.34-7.87%$2.59$2.3217,044 shs$7.82 million08/18/2025$2.36$2.54+7.63%$2.55$2.3614,931 shs$8.48 million Get the Latest News and Ratings for CYCN and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Cyclerion Therapeutics and its competitors with MarketBeat's FREE daily newsletter. 08/15/2025$2.33$2.36+1.29%$2.44$2.3029,793 shs$7.88 million08/14/2025$2.45$2.33-4.74%$2.56$2.2820,595 shs$7.78 million08/13/2025$2.40$2.45+1.92%$2.56$2.3725,117 shs$8.16 million08/12/2025$2.17$2.40+10.60%$2.43$2.1649,311 shs$8.02 million08/11/2025$2.29$2.17-5.24%$2.37$2.1013,339 shs$7.25 million08/08/2025$2.36$2.29-2.97%$2.41$2.2911,514 shs$7.65 million08/07/2025$2.39$2.36-1.26%$2.39$2.3224,364 shs$7.58 million08/06/2025$2.79$2.39-14.37%$2.70$2.3659,547 shs$7.67 million08/05/2025$2.79$2.79+0.22%$2.89$2.5170,795 shs$8.96 million08/04/2025$2.57$2.79+8.58%$2.89$2.5536,218 shs$8.94 million08/01/2025$2.65$2.57-3.21%$2.75$2.5521,239 shs$8.23 million07/31/2025$2.64$2.65+0.38%$2.75$2.5180,003 shs$8.51 million07/30/2025$2.73$2.64-3.30%$2.78$2.5739,863 shs$8.47 million07/29/2025$2.78$2.73-1.80%$2.95$2.6043,943 shs$8.76 million Related Companies CLSD Stock Chart AKTX Stock Chart MURA Stock Chart SNYR Stock Chart BTAI Stock Chart MAAQ Stock Chart DYAI Stock Chart JATT Stock Chart KZR Stock Chart TRIB Stock Chart Receive CYCN Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Cyclerion Therapeutics and its competitors with MarketBeat's FREE daily newsletter. 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