Assembly Biosciences (ASMB) Stock Chart & Stock Price History $24.67 -0.86 (-3.37%) Closing price 09/26/2025 04:00 PM EasternExtended Trading$24.67 0.00 (0.00%) As of 09/26/2025 05:30 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 InterestSustainabilityTrendsBuy This Stock Assembly Biosciences Stock Price Performance The Assembly Biosciences (ASMB) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 56.24%, with a year-to-date return of 56.34%. In the past month, the stock has decreased 4.71%, reflecting recent market activity. As of the latest close, Assembly Biosciences traded at $24.67 with a market cap of $189.22 million and volume of 68,044 shares. Five years ago, the stock traded at a split-adjusted price of $194.88, representing a 87.34% decrease over that period. At the time, it had a market cap of $533.57 million and a volume of 22,565 shares. Receive ASMB Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Assembly Biosciences 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. 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Read our full terms of service and privacy policy. 5 Day Performance-0.44%1 Month Performance-4.71%3 Month Performance+42.52%Year-To-Date Performance+56.34%1 Year Performance+56.24%5 Year Performance-87.34% ASMB Stock Chart for Saturday, September, 27, 2025 ASMB Chart by TradingView Assembly Biosciences 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 Capitalization09/26/2025$25.53$24.67-3.37%$25.60$24.3468,044 shs$189.22 million09/25/2025$25.66$25.53-0.51%$27.10$24.84111,862 shs$195.82 million09/24/2025$25.99$25.66-1.27%$26.84$25.6186,454 shs$196.86 million09/23/2025$24.78$25.99+4.88%$26.16$24.84249,050 shs$199.34 million09/22/2025$24.46$24.78+1.31%$25.14$23.70236,421 shs$190.06 million09/19/2025$22.27$24.46+9.83%$24.76$21.91753,068 shs$187.61 million09/18/2025$20.62$22.27+8.00%$22.29$20.75144,308 shs$170.86 million09/17/2025$20.55$20.62+0.34%$20.98$20.23144,489 shs$158.16 million09/16/2025$21.19$20.55-3.02%$21.34$20.4455,530 shs$157.62 million09/15/2025$21.85$21.19-3.02%$21.96$21.1179,788 shs$162.57 million Get the Latest News and Ratings for ASMB and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Assembly Biosciences and its competitors with MarketBeat's FREE daily newsletter. 09/12/2025$22.59$21.85-3.28%$22.93$21.6767,503 shs$167.63 million09/11/2025$22.26$22.59+1.48%$22.85$22.01109,840 shs$173.27 million09/10/2025$23.15$22.26-3.84%$23.61$22.2067,871 shs$170.73 million09/09/2025$23.32$23.15-0.73%$23.52$22.60106,795 shs$177.56 million09/08/2025$23.82$23.32-2.10%$25.32$22.36289,261 shs$178.86 million09/05/2025$23.31$23.82+2.19%$24.17$22.85235,569 shs$182.70 million09/04/2025$23.90$23.31-2.47%$23.82$22.50172,480 shs$178.79 million09/03/2025$24.13$23.90-0.95%$24.29$23.54130,276 shs$183.31 million09/02/2025$24.70$24.13-2.31%$24.89$23.43135,229 shs$185.13 million09/01/2025$24.70$24.70$25.43$24.00122,376 shs$189.45 million08/29/2025$25.50$24.70-3.14%$25.43$24.00122,376 shs$189.45 million08/28/2025$25.89$25.50-1.51%$26.14$25.25147,675 shs$195.59 million08/27/2025$25.62$25.89+1.05%$26.13$25.20227,378 shs$198.63 million08/26/2025$26.62$25.62-3.76%$26.74$24.98154,775 shs$196.51 million Related Companies Omeros Stock Price Chart Cumberland Pharmaceuticals Stock Price Chart Eli Lilly and Company Stock Price Chart Johnson & Johnson Stock Price Chart AbbVie Stock Price Chart Merck & Co., Inc. Stock Price Chart Pfizer Stock Price Chart Bristol Myers Squibb Stock Price Chart Zoetis Stock Price Chart Royalty Pharma Stock Price Chart Receive ASMB Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Assembly Biosciences and its competitors with MarketBeat's FREE daily newsletter. This page (NASDAQ:ASMB) was last updated on 9/27/2025 by MarketBeat.com Staff From Our PartnersTrump’s national nightmare is herePorter Stansberry and Jeff Brown say a new U.S. national emergency is already underway — and it could trigger ...Porter & Company | SponsoredHe Called Nvidia at $1.10. Now, He Says THIS Stock Will…The original Magnificent Seven returned 16,894%—turning $7K into $1.18 million. 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