American Superconductor (AMSC) Stock Chart & Stock Price History $66.52 +0.98 (+1.49%) Closing price 03:59 PM EasternExtended Trading$66.67 +0.15 (+0.22%) As of 04:02 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock American Superconductor Stock Price Performance The American Superconductor (AMSC) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 185.85%, with a year-to-date return of 170.06%. In the past month, the stock has increased 17.54%, reflecting recent market activity. As of the latest close, American Superconductor traded at $65.54 with a market cap of $2.96 billion and volume of 1.91 million shares. Five years ago, the stock traded at $18.25, representing a 264.48% increase over that period. At the time, it had a market cap of $420.39 million and a volume of 375,802 shares. Receive AMSC Stock News and Ratings via EmailSign-up to receive the latest news and ratings for American Superconductor 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+18.27%1 Month Performance+17.54%3 Month Performance+62.40%Year-To-Date Performance+170.06%1 Year Performance+185.85%5 Year Performance+264.48% AMSC Stock Chart for Wednesday, October, 15, 2025 AMSC Chart by TradingView American Superconductor 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 Capitalization10/14/2025$61.57$65.54+6.45%$66.55$57.011.91 million shs$2.96 billion10/13/2025$56.24$61.57+9.48%$62.22$58.281.11 million shs$2.78 billion10/10/2025$59.79$56.24-5.94%$63.01$56.071.25 million shs$2.54 billion10/09/2025$60.70$59.79-1.50%$61.61$59.19830,959 shs$2.70 billion10/08/2025$56.55$60.70+7.34%$61.04$57.291.11 million shs$2.74 billion10/07/2025$60.98$56.55-7.26%$62.79$55.511.79 million shs$2.55 billion10/06/2025$59.30$60.98+2.83%$63.64$58.711.05 million shs$2.75 billion10/03/2025$59.25$59.30+0.08%$62.16$58.381.56 million shs$2.68 billion10/02/2025$59.17$59.25+0.14%$60.99$58.26808,347 shs$2.68 billion10/01/2025$59.39$59.17-0.37%$60.08$57.62661,335 shs$2.67 billion Get the Latest News and Ratings for AMSC and Related StocksEnter your email address below to receive the latest news and analysts' ratings for American Superconductor and its competitors with MarketBeat's FREE daily newsletter. 09/30/2025$60.84$59.39-2.38%$61.50$57.801.03 million shs$2.68 billion09/29/2025$58.57$60.84+3.88%$62.00$59.501.23 million shs$2.75 billion09/26/2025$57.96$58.57+1.05%$59.75$57.49710,179 shs$2.65 billion09/25/2025$59.61$57.96-2.77%$58.98$54.131.04 million shs$2.62 billion09/24/2025$61.34$59.61-2.82%$62.41$58.131.22 million shs$2.69 billion09/23/2025$64.63$61.34-5.09%$64.53$60.061.22 million shs$2.77 billion09/22/2025$61.55$64.63+5.00%$65.12$60.311.49 million shs$2.92 billion09/19/2025$64.49$61.55-4.56%$65.70$60.652.87 million shs$2.78 billion09/18/2025$60.49$64.49+6.61%$65.58$60.052.38 million shs$2.91 billion09/17/2025$56.51$60.49+7.04%$61.11$55.392.11 million shs$2.73 billion09/16/2025$56.59$56.51-0.14%$56.60$54.89644,184 shs$2.55 billion09/15/2025$56.32$56.59+0.48%$57.25$55.30795,647 shs$2.56 billion Related Companies Acuity Stock Chart Generac Stock Chart Enphase Energy Stock Chart Belden Stock Chart Enersys Stock Chart Franklin Electric Stock Chart Powell Industries Stock Chart Brady Stock Chart Vicor Stock Chart Preformed Line Products Stock Chart Receive AMSC Stock News and Ratings via EmailSign-up to receive the latest news and ratings for American Superconductor and its competitors with MarketBeat's FREE daily newsletter. 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