Quantum (QMCO) Stock Chart & Stock Price History $10.40 -0.57 (-5.20%) Closing price 06/12/2025 04:00 PM EasternExtended Trading$10.12 -0.29 (-2.74%) As of 07:10 AM 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 decreased 1.70%, with a year-to-date return of -80.71%. In the past month, the stock has decreased 2.71%, reflecting recent market activity. As of the latest close, Quantum traded at $10.40 with a market cap of $72.28 million and volume of 1.62 million shares. Five years ago, the stock traded at a split-adjusted price of $82.20, representing a 87.35% decrease over that period. At the time, it had a market cap of $164.02 million and a volume of 10,984 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-2.16%1 Month Performance-2.71%3 Month Performance-29.82%Year-To-Date Performance-80.71%1 Year Performance-1.70%5 Year Performance-87.35% QMCO Stock Chart for Friday, June, 13, 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 Capitalization06/12/2025$10.97$10.40-5.20%$10.95$10.351.62 million shs$72.28 million06/11/2025$10.61$10.97+3.39%$11.84$10.764.69 million shs$76.24 million06/10/2025$11.15$10.61-4.84%$11.32$10.581.76 million shs$73.74 million06/09/2025$10.63$11.15+4.89%$11.28$10.601.72 million shs$77.49 million06/06/2025$10.35$10.63+2.71%$10.87$10.101.52 million shs$73.88 million06/05/2025$11.94$10.35-13.32%$11.88$9.933.02 million shs$71.93 million06/04/2025$11.88$11.94+0.51%$12.05$11.69965,379 shs$82.98 million06/03/2025$11.74$11.88+1.19%$12.53$11.681.26 million shs$82.57 million06/02/2025$12.03$11.74-2.41%$11.92$11.171.24 million shs$81.59 million05/30/2025$12.50$12.03-3.76%$12.56$11.682.02 million shs$83.61 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. 05/29/2025$13.98$12.50-10.59%$14.11$12.463.57 million shs$86.88 million05/28/2025$12.26$13.98+14.03%$14.29$11.966.06 million shs$97.16 million05/27/2025$11.87$12.26+3.29%$12.69$11.842.38 million shs$85.21 million05/26/2025$11.87$11.87$12.87$11.694.09 million shs$82.50 million05/23/2025$12.88$11.87-7.84%$12.87$11.694.09 million shs$82.50 million05/22/2025$11.51$12.88+11.90%$14.40$11.067.97 million shs$89.52 million05/21/2025$12.86$11.51-10.50%$12.82$11.403.04 million shs$79.99 million05/20/2025$13.65$12.86-5.79%$14.23$12.026.39 million shs$89.38 million05/19/2025$10.94$13.65+24.77%$14.35$10.429.41 million shs$94.87 million05/16/2025$10.52$10.94+3.99%$11.47$10.501.82 million shs$76.03 million05/15/2025$11.01$10.52-4.45%$10.80$10.101.05 million shs$73.11 million05/14/2025$10.69$11.01+2.99%$11.86$10.851.56 million shs$76.52 million05/13/2025$11.13$10.69-3.95%$11.26$10.60768,488 shs$74.30 million05/12/2025$10.81$11.13+2.96%$11.40$10.901.26 million shs$77.35 million Related Companies DDD Stock Chart KOPN Stock Chart RDCM Stock Chart MKFG Stock Chart LTRX Stock Chart SILC 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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