Quantum (QMCO) News Today $12.69 +0.89 (+7.54%) Closing price 04:00 PM EasternExtended Trading$12.71 +0.02 (+0.16%) As of 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 Headlines Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Why Is Quantum Up Today?Toggle Visibility of Why Is Quantum Up Today?Quantum Corporation (QMCO) shares moved higher today on heavy volume amid broad “quantum” sector strength and headline activity around shareholder litigation. Investors are likely weighing upbeat sector momentum against fresh legal risk tied specifically to QMCO. Positive Sentiment: Broad sector rally: U.S. quantum-computing names surged again on renewed investor interest, supporting higher prices for smaller quantum-related stocks. Quantum computing stocks soared again yesterday Positive Sentiment: JPMorgan/strategic-investing headlines: Coverage noted large financial players increasing strategic tech exposure, which helped lift investor appetite for quantum-related and adjacent tech names. Quantum stocks surge after JPMorgan investing push into strategic tech Neutral Sentiment: Ecosystem and infrastructure developments (industry-level): New initiatives such as D‑Wave’s Q‑Alliance quantum hub and partnerships focused on quantum‑secure energy systems expand the industry narrative but do not directly involve QMCO. These items support long-term sector interest rather than immediate company-specific moves. The Birth of the World's Most Powerful Quantum Hub Energy Plug and Malahat Battery Technology Announce Strategic Alliance with Quantum eMotion Negative Sentiment: Multiple securities‑fraud class actions and solicitations: Several law firms have filed suits or are soliciting QMCO investors (class period cited Nov 15, 2024–Aug 18, 2025) and are recruiting lead plaintiffs ahead of November deadlines. That litigation cloud is an immediate negative for QMCO’s outlook and could increase legal costs, management distraction, and share volatility. Pomerantz investor alert re: QMCO class action PR Newswire: Opportunity to lead securities fraud lawsuit Posted 4h agoAI Generated. May Contain Errors. QMCO Latest News All Sources Trusted Sources MarketBeat Barchart Benzinga Bloomberg GlobeNewswire GuruFocus MarketWatch Motley Fool NASDAQ PR Newswire Reuters Seeking Alpha TalkMarkets The Street TipRanks The Wall Street Journal Wall Street Zen Yahoo Finance Source Sentiment refers to the positivity or negativity of each headline according to our language processing algorithm. Sentiment All Sentiments Very Positive Positive Neutral Negative Very Negative Most Recent October 2025 September 2025 August 2025 July 2025 June 2025 May 2025 April 2025 March 2025 February 2025 January 2025 December 2024 November 2024 October 2024 September 2024 August 2024 July 2024 June 2024 May 2024 April 2024 March 2024 February 2024 January 2024 December 2023 November 2023 October 2023 September 2023 August 2023 July 2023 June 2023 May 2023 April 2023 March 2023 February 2023 January 2023 December 2022 November 2022 Time Period INVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Quantum Corporation of Class Action Lawsuit and Upcoming Deadlines - QMCOOctober 14 at 5:28 PM | globenewswire.comQuantum Corporation (QMCO) Shareholders Who Lost Money Have Opportunity to Lead Securities Fraud LawsuitOctober 14 at 4:16 PM | prnewswire.comThe Birth of the World's Most Powerful Quantum HubOctober 14 at 7:00 AM | businesswire.comQMCO Investors Have Opportunity to Lead Quantum Corporation Securities Fraud Lawsuit with the Schall Law FirmOctober 13 at 4:57 PM | prnewswire.comQuantum Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - QMCOOctober 13 at 4:56 PM | prnewswire.comROSEN, THE FIRST FILING FIRM, Encourages Quantum Corporation Investors to Secure Counsel Before Important Deadline in Securities Class Action First Filed by the Firm - QMCOOctober 13 at 4:13 PM | globenewswire.comINVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Quantum Corporation of Class Action Lawsuit and Upcoming Deadlines - QMCOOctober 13 at 2:34 PM | prnewswire.comQuantum stocks surge after JPMorgan investing push into strategic techOctober 13 at 2:03 PM | cnbc.comQuantum-Si to Report Third Quarter 2025 Financial Results on November 5, 2025October 13 at 8:20 AM | businesswire.comROSEN, GLOBAL INVESTOR COUNSEL, Encourages Quantum Corporation Investors to Secure Counsel Before Important Deadline in Securities Class Action First Filed by the Firm - QMCOOctober 12 at 11:02 PM | globenewswire.comQMCO INVESTOR NOTICE: Faruqi & Faruqi, LLP Investigates Claims on Behalf of Investors of QuantumOctober 12 at 8:32 AM | globenewswire.comQUANTUM DEADLINE REMINDER: Bragar Eagel & Squire, P.C. Urges Quantum Corporation Investors to Contact the Firm Before the November 3rd DeadlineOctober 11 at 11:18 AM | globenewswire.comWhy Quantum-Si Stock Flopped on FridayOctober 10, 2025 | fool.comQMCO INVESTOR ALERT: Bronstein, Gewirtz & Grossman LLC Announces that Quantum Corporation Investors with Substantial Losses Have Opportunity to Lead Class Action LawsuitOctober 10, 2025 | globenewswire.comWeiss Ratings Reaffirms "Sell (D-)" Rating for Quantum (NASDAQ:QMCO)October 10, 2025 | marketbeat.comSHAREHOLDER ACTION REMINDER: Faruqi & Faruqi, LLP Investigates Claims on Behalf of Investors of QuantumOctober 9, 2025 | prnewswire.comROSEN, GLOBAL INVESTOR COUNSEL, Encourages Quantum Corporation Investors to Secure Counsel Before Important Deadline in Securities Class Action First Filed by the Firm - QMCOOctober 9, 2025 | globenewswire.comDeadline Alert: Quantum Corporation (QMCO) Shareholders Who Lost Money Urged To Contact Glancy Prongay & Murray LLP About Securities Fraud LawsuitOctober 9, 2025 | globenewswire.comQuantum (QMCO): Valuation Insights Following Accounting Irregularities and Executive DeparturesOctober 9, 2025 | finance.yahoo.comQuantum Leap: Quantum Computing shares sputter following $750M private placementOctober 8, 2025 | msn.comINVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Quantum Corporation of Class Action Lawsuit and Upcoming Deadlines - QMCOOctober 8, 2025 | prnewswire.comQuantum Appoints Geoff Barrall as Chief Product Officer to Accelerate Innovation and Product StrategyOctober 8, 2025 | theglobeandmail.comQMCO DEADLINE ALERT: Faruqi & Faruqi, LLP Investigates Claims on Behalf of Investors of QuantumOctober 8, 2025 | globenewswire.comQuantum Corporation (QMCO) Shareholders Who Lost Money Have Opportunity to Lead Securities Fraud LawsuitOctober 7, 2025 | prnewswire.comQUANTUM CLASS ACTION ALERT: Bragar Eagel & Squire, P.C. Reminds Quantum Corporation Investors a Class Action Lawsuit Has Been Filed and Encourages Investors to Contact the FirmOctober 7, 2025 | globenewswire.comQMCO Investors Have Opportunity to Lead Quantum Corporation Securities Fraud Lawsuit with the Schall Law FirmOctober 7, 2025 | prnewswire.comQuantum Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - QMCOOctober 7, 2025 | prnewswire.comQuantum (NASDAQ:QMCO) Shares Up 1.3% - Should You Buy?October 7, 2025 | marketbeat.comQuantum (NASDAQ:QMCO) & Storage Computer (OTCMKTS:SOSO) Financial ReviewOctober 7, 2025 | americanbankingnews.comROSEN, A LEADING LAW FIRM, Encourages Quantum Corporation Investors to Secure Counsel Before Important Deadline in Securities Class Action First Filed by the Firm - QMCOOctober 6, 2025 | globenewswire.comCan Quantum’s (QMCO) Leadership Shakeup Undermine Trust in Its Data Protection Strategy?October 6, 2025 | finance.yahoo.comQMCO INVESTOR NOTICE: Faruqi & Faruqi, LLP Investigates Claims on Behalf of Investors of Quantum CorporationOctober 5, 2025 | globenewswire.comQMCO Investors Have Opportunity to Lead Quantum Corporation Securities Fraud Lawsuit First Filed by The Rosen Law FirmOctober 5, 2025 | prnewswire.comStock-Split Watch: Is Quantum Computing Next?October 5, 2025 | fool.comThese Quantum Computing Stocks Could Be the Secret Winners of the AI BoomOctober 4, 2025 | fool.comThese Quantum Computing Stocks Could Be the Secret Winners of the AI BoomOctober 4, 2025 | fool.comQuantum Corporation (NASDAQ:QMCO) Receives Consensus Rating of "Moderate Buy" from AnalystsOctober 3, 2025 | marketbeat.comQuantum Corporation (QMCO) Shareholders Who Lost Money Have Opportunity to Lead Securities Fraud LawsuitOctober 3, 2025 | prnewswire.comROSEN, THE FIRST FILING FIRM, Encourages Quantum Corporation Investors to Secure Counsel Before Important Deadline in Securities Class Action First Filed by the Firm - QMCOOctober 3, 2025 | globenewswire.comQMCO INVESTOR ALERT: Bronstein, Gewirtz & Grossman LLC Announces that Quantum Corporation Investors with Substantial Losses Have Opportunity to Lead Class Action LawsuitOctober 3, 2025 | globenewswire.comINVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Quantum Corporation of Class Action Lawsuit and Upcoming Deadlines - QMCOOctober 3, 2025 | prnewswire.comSHAREHOLDER ACTION REMINDER: Faruqi & Faruqi, LLP Investigates Claims on Behalf of Investors of QuantumOctober 2, 2025 | prnewswire.comQMCO Investors Have Opportunity to Lead Quantum Corporation Securities Fraud Lawsuit with the Schall Law FirmOctober 2, 2025 | prnewswire.comQuantum Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - QMCOOctober 2, 2025 | prnewswire.comROSEN, NATIONALLY REGARDED INVESTOR RIGHTS COUNSEL, Encourages Quantum Corporation Investors to Secure Counsel Before Important Deadline in Securities Class Action First Filed by the Firm - QMCOOctober 1, 2025 | globenewswire.comDeadline Alert: Quantum Corporation (QMCO) Shareholders Who Lost Money Urged To Contact Glancy Prongay & Murray LLP About Securities Fraud LawsuitOctober 1, 2025 | globenewswire.comQuantum BioPharma Welcomes World-Renowned Multiple Sclerosis Expert Dr. Jack Antel as Clinical Development Advisor For Lucid-MS TrialsOctober 1, 2025 | globenewswire.comQMCO Investors Have Opportunity to Lead Quantum Corporation Securities Fraud Lawsuit First Filed by The Rosen Law FirmSeptember 30, 2025 | prnewswire.comQuantum’s Scalar i7 RAPTOR Wins TV Tech Best of Show Award at IBC 2025September 30, 2025 | finance.yahoo.comQuantum (QMCO) Price Target Decreased by 30.30% to 11.73September 30, 2025 | msn.com Get Quantum News Delivered to You Automatically Sign up to receive the latest news and ratings for QMCO and its competitors with MarketBeat's FREE daily newsletter. 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Our company news sentiment scores track the average news sentiment of articles about each company over the most recent 7 days in order to identify companies that are receiving positive press. QMCO News Sentiment▼0.390.72▲Average Computer and Technology News Sentiment QMCO News Coverage Learn about the media coverage comparison. We track news headlines from hundreds of news outlets and tag them by company. This chart compares the number of articles about this company in the last seven days compared with the average number of articles about this company on a typical week. QMCO Articles This Week▼259▲QMCO Articles Average Week Get the Latest News and Ratings for QMCO and Related Stocks Enter your email address to receive the latest news and analysts' ratings for Quantum and its competitors. 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