Quantum (QMCO) Stock Chart & Stock Price History $7.75 +0.72 (+10.24%) Closing price 08/22/2025 04:00 PM EasternExtended Trading$7.68 -0.07 (-0.84%) As of 08/22/2025 07:59 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 ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Quantum Stock Price Performance The Quantum (QMCO) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 84.70%, with a year-to-date return of -85.63%. In the past month, the stock has decreased 12.73%, reflecting recent market activity. As of the latest close, Quantum traded at $7.75 with a market cap of $53.86 million and volume of 562,097 shares. Five years ago, the stock traded at a split-adjusted price of $112.00, representing a 93.08% decrease over that period. At the time, it had a market cap of $223.49 million and a volume of 12,403 shares. Receive QMCO Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Quantum and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance+13.47%1 Month Performance-12.73%3 Month Performance-34.71%Year-To-Date Performance-85.63%1 Year Performance+84.70%5 Year Performance-93.08% QMCO Stock Chart for Sunday, August, 24, 2025 QMCO Chart by TradingView Quantum 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$7.03$7.75+10.24%$7.77$6.98562,097 shs$53.86 million08/21/2025$6.77$7.03+3.84%$7.03$6.68327,942 shs$48.86 million08/20/2025$6.83$6.77-0.88%$6.89$6.51417,998 shs$47.05 million08/19/2025$7.44$6.83-8.20%$7.34$6.76799,357 shs$47.47 million08/18/2025$7.55$7.44-1.46%$7.52$7.27234,386 shs$51.71 million08/15/2025$7.87$7.55-4.07%$7.83$7.47465,171 shs$52.47 million08/14/2025$8.00$7.87-1.63%$7.90$7.58327,386 shs$54.70 million08/13/2025$7.43$8.00+7.67%$8.00$7.27672,933 shs$55.60 million08/12/2025$7.66$7.43-3.00%$7.70$6.90891,732 shs$51.64 million08/11/2025$7.80$7.66-1.79%$7.99$7.61453,879 shs$53.24 million Get the Latest News and Ratings for QMCO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Quantum and its competitors with MarketBeat's FREE daily newsletter. 08/08/2025$7.92$7.80-1.52%$8.08$7.77449,876 shs$54.21 million08/07/2025$7.91$7.92+0.13%$8.08$7.81259,933 shs$55.04 million08/06/2025$8.31$7.91-4.81%$8.14$7.84376,557 shs$54.97 million08/05/2025$8.08$8.31+2.85%$8.39$7.98653,638 shs$57.75 million08/04/2025$7.53$8.08+7.30%$8.08$7.62518,761 shs$56.16 million08/01/2025$8.01$7.53-5.99%$7.81$7.45600,544 shs$52.33 million07/31/2025$7.87$8.01+1.78%$8.24$7.87438,994 shs$55.67 million07/30/2025$7.88$7.87-0.13%$8.14$7.83355,089 shs$54.70 million07/29/2025$8.28$7.88-4.83%$8.38$7.86670,810 shs$54.77 million07/28/2025$8.88$8.28-6.76%$9.05$8.121.01 million shs$57.55 million07/25/2025$8.88$8.88$9.04$8.70418,394 shs$61.72 million07/24/2025$9.15$8.88-2.95%$9.12$8.86475,327 shs$61.72 million07/23/2025$9.16$9.15-0.11%$9.34$9.00593,075 shs$63.59 million Related Companies RDCM Stock Chart LTRX Stock Chart OSS Stock Chart SILC Stock Chart INVE Stock Chart ALOT Stock Chart LINK Stock Chart FOXX Stock Chart TACT Stock Chart INTZ Stock Chart Receive QMCO Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Quantum and its competitors with MarketBeat's FREE daily newsletter. 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