Quantum-Si (QSIAW) Stock Chart & Stock Price History $0.28 -0.05 (-14.15%) As of 03:38 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisChartCompetitorsSEC FilingsShort InterestTrendsBuy This Stock Quantum-Si Stock Price Performance The Quantum-Si (QSIAW) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 224.42%, with a year-to-date return of -77.68%. In the past month, the stock has decreased 38.41%, reflecting recent market activity. As of the latest close, Quantum-Si traded at $0.33 with a market cap of and volume of 23,926 shares. Receive QSIAW Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Quantum-Si and its competitors with MarketBeat's FREE daily newsletter. 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Read our full terms of service and privacy policy. 5 Day Performance+32.10%1 Month Performance-38.41%3 Month Performance-60.14%Year-To-Date Performance-77.68%1 Year Performance+224.42% QSIAW Stock Chart for Thursday, September, 25, 2025 QSIAW Chart by TradingView Quantum-Si 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 Capitalization09/24/2025$0.31$0.33+4.87%$0.34$0.2523,926 shs$0.0009/23/2025$0.28$0.31+12.28%$0.36$0.25131,057 shs$0.0009/22/2025$0.21$0.28+30.68%$0.29$0.21154,334 shs$0.0009/19/2025$0.30$0.21-29.29%$0.32$0.19351,459 shs$0.0009/18/2025$0.21$0.30+42.44%$0.34$0.22151,839 shs$0.0009/17/2025$0.22$0.21-2.47%$0.25$0.16103,794 shs$0.0009/16/2025$0.21$0.22+1.61%$0.23$0.2047,670 shs$0.0009/15/2025$0.22$0.21-4.90%$0.23$0.16305,193 shs$0.0009/12/2025$0.21$0.22+5.95%$0.24$0.1942,867 shs$0.0009/11/2025$0.25$0.21-16.00%$0.29$0.20436,450 shs$0.00 Get the Latest News and Ratings for QSIAW and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Quantum-Si and its competitors with MarketBeat's FREE daily newsletter. 09/10/2025$0.22$0.25+16.23%$0.26$0.226,518 shs$0.0009/09/2025$0.20$0.22+7.55%$0.25$0.2096,499 shs$0.0009/08/2025$0.38$0.20-47.37%$0.35$0.11710,959 shs$0.0009/05/2025$0.40$0.38-5.02%$0.41$0.25111,388 shs$0.0009/04/2025$0.41$0.40-2.41%$0.40$0.401,153 shs$0.0009/03/2025$0.43$0.41-4.65%$0.50$0.354,704 shs$0.0009/02/2025$0.46$0.43-5.91%$0.53$0.462,530 shs$0.0009/01/2025$0.46$0.46$0.42$0.42504 shs$0.0008/29/2025$0.45$0.46+1.56%$0.42$0.42504 shs$0.0008/28/2025$0.41$0.45+9.22%$0.50$0.403,816 shs$0.0008/27/2025$0.45$0.41-8.44%$0.49$0.441,426 shs$0.0008/26/2025$0.45$0.45-0.66%$0.48$0.4013,747 shs$0.0008/25/2025$0.49$0.45-8.13%$0.50$0.416,606 shs$0.00 Related Companies HTGMQ Stock Price Chart OLITW Stock Price Chart PRENW Stock Price Chart SMAPW Stock Price Chart TT Stock Price Chart KEYS Stock Price Chart VLTO Stock Price Chart TER Stock Price Chart FTV Stock Price Chart RVTY Stock Price Chart Receive QSIAW Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Quantum-Si and its competitors with MarketBeat's FREE daily newsletter. 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