Quantum-Si (QSIAW) Stock Chart & Stock Price History $0.35 +0.01 (+2.06%) As of 03:43 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 157.23%, with a year-to-date return of -72.24%. In the past month, the stock has decreased 42.35%, reflecting recent market activity. As of the latest close, Quantum-Si traded at $0.34 with a market cap of and volume of 11,892 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. Email Address 5 Day Performance-12.81%1 Month Performance-42.35%3 Month Performance-29.17%Year-To-Date Performance-72.24%1 Year Performance+157.23% QSIAW Stock Chart for Friday, August, 15, 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 Capitalization08/15/2025$0.34$0.35+2.06%$0.36$0.3014,180 shs$0.0008/14/2025$0.33$0.34+3.50%$0.37$0.3111,892 shs$0.0008/13/2025$0.37$0.33-12.02%$0.37$0.3035,680 shs$0.0008/12/2025$0.39$0.37-4.26%$0.44$0.3137,918 shs$0.0008/11/2025$0.40$0.39-2.01%$0.42$0.398,163 shs$0.0008/08/2025$0.43$0.40-6.79%$0.45$0.3510,423 shs$0.0008/07/2025$0.44$0.43-2.29%$0.45$0.406,625 shs$0.0008/06/2025$0.45$0.44-3.10%$0.48$0.472,595 shs$0.0008/05/2025$0.46$0.45-1.96%$0.49$0.404,628 shs$0.0008/04/2025$0.48$0.46-4.66%$0.49$0.409,535 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. 08/01/2025$0.46$0.48+4.89%$0.49$0.432,754 shs$0.0007/31/2025$0.48$0.46-4.31%$0.49$0.463,016 shs$0.0007/30/2025$0.54$0.48-11.15%$0.51$0.3130,073 shs$0.0007/29/2025$0.58$0.54-5.91%$0.58$0.4635,068 shs$0.0007/28/2025$0.58$0.58-0.86%$0.59$0.561,023 shs$0.0007/25/2025$0.58$0.58$0.61$0.5510,748 shs$0.0007/24/2025$0.59$0.58-1.53%$0.61$0.5512,420 shs$0.0007/23/2025$0.56$0.59+5.18%$0.61$0.564,782 shs$0.0007/22/2025$0.60$0.56-5.88%$0.60$0.562,763 shs$0.0007/21/2025$0.58$0.60+2.59%$0.61$0.4525,381 shs$0.0007/18/2025$0.61$0.58-4.92%$0.61$0.5840,032 shs$0.0007/17/2025$0.56$0.61+8.37%$0.61$0.5712,542 shs$0.0007/16/2025$0.60$0.56-6.48%$0.60$0.5614,535 shs$0.0007/15/2025$0.61$0.60-0.68%$0.60$0.594,237 shs$0.0007/14/2025$0.62$0.61-1.46%$0.64$0.595,453 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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