Quantum (QMCO) Stock Chart & Stock Price History $10.32 -0.08 (-0.77%) Closing price 04:00 PM EasternExtended Trading$10.42 +0.10 (+0.97%) As of 05:26 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 5 Day Performance-7.31%1 Month Performance-51.61%3 Month Performance-68.10%6 Month Performance+192.96%Year-To-Date Performance-80.71%1 Year Performance+26.83% 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 QMCO Stock Chart for Thursday, April, 17, 2025 QMCO Chart by TradingViewRemove Ads Quantum Stock Price History Daily Weekly Monthly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year Time Frame * Start Date * End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization04/16/2025$11.20$10.40-7.14%$11.13$10.28464,066 shs$67.88 million04/15/2025$12.19$11.20-8.12%$12.88$11.20547,168 shs$73.10 million04/14/2025$11.22$12.19+8.65%$12.30$11.56528,945 shs$73.23 million04/11/2025$11.08$11.22+1.26%$11.48$10.58354,385 shs$73.23 million04/10/2025$12.08$11.08-8.28%$11.86$10.60818,592 shs$72.32 million04/09/2025$10.48$12.08+15.27%$12.39$10.36749,056 shs$78.85 million04/09/2025$10.48$12.08+15.27%$12.39$10.36749,056 shs$78.85 million04/08/2025$11.25$10.48-6.84%$12.48$10.33573,785 shs$68.40 million04/08/2025$11.25$10.48-6.84%$12.48$10.33573,785 shs$68.40 million04/07/2025$11.35$11.25-0.88%$12.50$9.74740,673 shs$73.43 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. 04/04/2025$12.44$11.35-8.76%$12.00$10.82645,198 shs$66.22 million04/03/2025$13.11$12.44-5.11%$12.60$11.74522,894 shs$72.58 million04/02/2025$14.07$13.11-6.82%$13.83$12.751.00 million shs$76.48 million04/01/2025$14.38$14.07-2.16%$15.30$13.64585,232 shs$82.08 million03/31/2025$14.15$14.38+1.63%$14.58$12.85652,948 shs$83.89 million03/28/2025$15.39$14.15-8.06%$15.37$14.07567,181 shs$82.55 million03/27/2025$15.01$15.39+2.53%$16.99$14.271.16 million shs$89.79 million03/26/2025$16.22$15.01-7.46%$17.07$14.691.19 million shs$87.57 million03/25/2025$17.22$16.22-5.81%$17.64$15.92909,301 shs$94.63 million03/24/2025$16.72$17.22+2.99%$18.45$17.001.60 million shs$100.46 million03/21/2025$16.45$16.72+1.64%$18.60$15.752.63 million shs$97.54 million03/20/2025$19.63$16.45-16.20%$19.50$15.552.13 million shs$95.97 million03/19/2025$19.80$19.63-0.86%$22.84$18.803.20 million shs$114.52 million03/18/2025$21.49$19.80-7.86%$24.40$17.566.85 million shs$115.51 million03/17/2025$15.34$21.49+40.09%$21.59$15.686.70 million shs$125.37 million Related Companies DDD Stock Chart RDCM Stock Chart KOPN Stock Chart MKFG Stock Chart SILC Stock Chart LTRX Stock Chart INVE Stock Chart ALOT Stock Chart OSS Stock Chart LINK 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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