Quantum-Si Stock Price History
NASDAQ: QSIIndustrialsIndustrial Machinery/ComponentsUSD
1.53+0.31 (+25.41%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
QSI price history at a glance
The price history for Quantum-Si (QSI) on this page begins on November 9, 2020, when the stock closed at $9.88; it most recently closed at $1.53 on October 5, 2026. The highest price in this record is $25.00, reached on February 15, 2021; the latest close is 93.9% below that peak. Across the 5 complete calendar years in the table, QSI finished higher in 2 and lower in 3. Its best year was 2024 (+113.4%) and its worst was 2022 (-76.7%).
Over roughly 6 years the share price changed -84.5%, a -27.1% compound annual price return (excluding dividends). In the last 12 months alone, QSI has lost 8.4%. Prices are split-adjusted closing prices; daily open, high, low, close and volume for the past year are listed below.
Summary generated from market data by MetaCap's automated system. Methodology
Key price levels
- High since 2020
- $25.00
- Date of high
- Feb 15, 2021
- Low since 2020
- $0.612
- Date of low
- Nov 18, 2024
- 52-week high
- $3.10
- 52-week low
- $0.69
- IPO year
- 2020
- Last close
- $1.53
QSI returns
1 week
-1.29%
1 month
+104.00%
3 months
+73.27%
6 months
+106.48%
Year to date
+39.09%
1 year
-8.38%
3 years
+14.18%
5 years
-82.21%
QSI price return, excluding dividends.
QSI annual returns
| Year | Year-end close | Return |
|---|---|---|
| 2026 | 1.53 | +31.90% |
| 2025 | 1.16 | -72.96% |
| 2024 | 4.29 | +113.43% |
| 2023 | 2.01 | +9.84% |
| 2022 | 1.83 | -76.75% |
| 2021 | 7.87 | -22.46% |
| 2020* | 10.15 | +2.73% |
* Partial year: the record begins after the start of 2020; return measured from the first available close.
2026 return is year to date.
QSI daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 1.26 | 1.66 | 1.26 | 1.53 | +25.41% | |
| 1.29 | 1.30 | 1.20 | 1.22 | -4.69% | |
| 1.17 | 1.31 | 1.09 | 1.28 | +4.92% | |
| 1.29 | 1.41 | 1.19 | 1.22 | -4.69% | |
| 1.53 | 1.53 | 1.26 | 1.28 | -17.42% | |
| 1.39 | 1.55 | 1.17 | 1.55 | +8.39% | |
| 1.20 | 1.48 | 1.15 | 1.43 | +33.64% | |
| 0.96 | 1.12 | 0.96 | 1.07 | +11.69% | |
| 0.805 | 1.03 | 0.805 | 0.958 | +20.50% | |
| 0.825 | 0.834 | 0.795 | 0.795 | -4.68% | |
| 0.794 | 0.84 | 0.776 | 0.834 | +6.24% | |
| 0.75 | 0.799 | 0.743 | 0.785 | +3.43% | |
| 0.79 | 0.805 | 0.752 | 0.759 | -3.31% | |
| 0.76 | 0.792 | 0.751 | 0.785 | +3.84% | |
| 0.759 | 0.766 | 0.75 | 0.756 | +1.48% | |
| 0.79 | 0.802 | 0.74 | 0.745 | -3.25% | |
| 0.75 | 0.796 | 0.75 | 0.77 | +5.48% | |
| 0.721 | 0.753 | 0.721 | 0.73 | +1.39% | |
| 0.72 | 0.741 | 0.72 | 0.72 | -0.69% | |
| 0.729 | 0.748 | 0.72 | 0.725 | -2.03% | |
| 0.739 | 0.755 | 0.739 | 0.74 | +0.14% | |
| 0.75 | 0.755 | 0.725 | 0.739 | -1.47% | |
| 0.76 | 0.775 | 0.746 | 0.75 | -1.32% | |
| 0.767 | 0.79 | 0.76 | 0.76 | -0.78% | |
| 0.76 | 0.774 | 0.76 | 0.766 | +0.66% | |
| 0.767 | 0.786 | 0.76 | 0.761 | 0.00% | |
| 0.759 | 0.785 | 0.75 | 0.761 | +0.53% | |
| 0.75 | 0.777 | 0.75 | 0.757 | -1.17% | |
| 0.779 | 0.78 | 0.763 | 0.766 | -1.79% | |
| 0.822 | 0.822 | 0.77 | 0.78 | -2.86% | |
| 0.791 | 0.834 | 0.79 | 0.803 | +1.52% | |
| 0.85 | 0.855 | 0.79 | 0.791 | -6.61% | |
| 0.789 | 0.859 | 0.782 | 0.847 | +10.14% | |
| 0.80 | 0.83 | 0.752 | 0.769 | -7.90% | |
| 0.785 | 0.931 | 0.78 | 0.835 | +7.05% | |
| 0.767 | 0.81 | 0.767 | 0.78 | +1.30% | |
| 0.719 | 0.785 | 0.719 | 0.77 | +5.77% | |
| 0.733 | 0.744 | 0.718 | 0.728 | -2.15% | |
| 0.74 | 0.795 | 0.739 | 0.744 | +0.54% | |
| 0.75 | 0.767 | 0.71 | 0.74 | -6.33% | |
| 0.855 | 0.914 | 0.79 | 0.79 | -5.62% | |
| 0.831 | 0.87 | 0.826 | 0.837 | +2.07% | |
| 0.795 | 0.849 | 0.795 | 0.82 | +3.80% | |
| 0.818 | 0.84 | 0.79 | 0.79 | -2.95% | |
| 0.762 | 0.829 | 0.762 | 0.814 | +7.81% | |
| 0.752 | 0.779 | 0.75 | 0.755 | -0.26% | |
| 0.775 | 0.793 | 0.757 | 0.757 | -1.05% | |
| 0.764 | 0.796 | 0.764 | 0.765 | +2.55% | |
| 0.72 | 0.76 | 0.711 | 0.746 | +4.78% | |
| 0.73 | 0.748 | 0.71 | 0.712 | -1.11% | |
| 0.726 | 0.744 | 0.69 | 0.72 | +2.56% | |
| 0.757 | 0.78 | 0.702 | 0.702 | -7.75% | |
| 0.775 | 0.78 | 0.74 | 0.761 | -2.81% | |
| 0.788 | 0.81 | 0.772 | 0.783 | +1.69% | |
| 0.794 | 0.801 | 0.761 | 0.77 | -2.53% | |
| 0.79 | 0.828 | 0.781 | 0.79 | -1.25% | |
| 0.81 | 0.845 | 0.80 | 0.80 | -4.31% | |
| 0.822 | 0.85 | 0.822 | 0.836 | +2.33% | |
| 0.83 | 0.842 | 0.81 | 0.817 | -0.61% | |
| 0.82 | 0.846 | 0.803 | 0.822 | +0.37% | |
| 0.854 | 0.856 | 0.806 | 0.819 | -4.99% | |
| 0.873 | 0.896 | 0.86 | 0.862 | -0.46% | |
| 0.87 | 0.90 | 0.861 | 0.866 | -0.35% | |
| 0.88 | 0.883 | 0.85 | 0.869 | -1.59% | |
| 0.946 | 0.954 | 0.882 | 0.883 | -8.21% | |
| 0.91 | 0.97 | 0.902 | 0.962 | +5.37% | |
| 0.886 | 0.93 | 0.886 | 0.913 | -0.76% | |
| 0.937 | 0.948 | 0.901 | 0.92 | -3.36% | |
| 0.928 | 0.98 | 0.928 | 0.952 | +2.37% | |
| 0.926 | 1.01 | 0.92 | 0.93 | +0.65% | |
| 0.88 | 0.964 | 0.879 | 0.924 | +4.41% | |
| 0.88 | 0.917 | 0.87 | 0.885 | -0.45% | |
| 0.859 | 0.914 | 0.85 | 0.889 | +3.98% | |
| 0.838 | 0.89 | 0.795 | 0.855 | -0.23% | |
| 0.85 | 0.887 | 0.78 | 0.857 | +3.63% | |
| 0.90 | 0.918 | 0.825 | 0.827 | -6.02% | |
| 0.91 | 0.93 | 0.88 | 0.88 | -4.45% | |
| 1.00 | 1.07 | 0.921 | 0.921 | -7.81% | |
| 0.964 | 1.03 | 0.96 | 0.999 | +5.83% | |
| 0.97 | 0.996 | 0.931 | 0.944 | -1.05% | |
| 0.995 | 0.995 | 0.94 | 0.954 | -3.54% | |
| 1.01 | 1.05 | 0.982 | 0.989 | +4.44% | |
| 0.985 | 1.01 | 0.933 | 0.947 | -2.67% | |
| 0.946 | 0.985 | 0.915 | 0.973 | +2.75% | |
| 0.975 | 1.02 | 0.946 | 0.947 | -4.05% | |
| 1.06 | 1.08 | 0.94 | 0.987 | -6.89% | |
| 1.09 | 1.10 | 1.03 | 1.06 | +0.95% | |
| 1.25 | 1.25 | 1.01 | 1.05 | -17.97% | |
| 1.19 | 1.30 | 1.17 | 1.28 | +7.56% | |
| 1.22 | 1.22 | 1.16 | 1.19 | -4.03% | |
| 1.17 | 1.26 | 1.16 | 1.24 | +5.08% | |
| 1.17 | 1.25 | 1.12 | 1.18 | -0.84% | |
| 1.21 | 1.21 | 1.11 | 1.19 | -0.83% | |
| 1.11 | 1.21 | 1.08 | 1.20 | +6.19% | |
| 1.06 | 1.19 | 1.03 | 1.13 | +4.63% | |
| 1.08 | 1.09 | 1.01 | 1.08 | +1.89% | |
| 0.999 | 1.09 | 0.996 | 1.06 | +7.07% | |
| 0.87 | 0.99 | 0.867 | 0.99 | +13.01% | |
| 0.872 | 0.88 | 0.841 | 0.876 | +1.74% | |
| 0.85 | 0.867 | 0.821 | 0.861 | +0.82% | |
| 0.896 | 0.896 | 0.827 | 0.854 | -4.04% | |
| 0.905 | 0.911 | 0.882 | 0.89 | -4.61% | |
| 0.933 | 0.96 | 0.905 | 0.933 | +0.43% | |
| 0.93 | 0.958 | 0.902 | 0.929 | -1.69% | |
| 0.92 | 1.03 | 0.90 | 0.945 | +2.49% | |
| 0.90 | 0.948 | 0.89 | 0.922 | +1.65% | |
| 0.95 | 0.973 | 0.88 | 0.907 | -7.54% | |
| 1.03 | 1.03 | 0.956 | 0.981 | -4.76% | |
| 0.971 | 1.04 | 0.962 | 1.03 | +7.18% | |
| 0.98 | 0.984 | 0.946 | 0.961 | -1.13% | |
| 0.95 | 0.985 | 0.94 | 0.972 | +1.46% | |
| 0.981 | 1.00 | 0.942 | 0.958 | -2.34% | |
| 0.877 | 1.02 | 0.877 | 0.981 | +13.41% | |
| 0.902 | 0.907 | 0.863 | 0.865 | -5.15% | |
| 0.89 | 0.94 | 0.885 | 0.912 | +1.33% | |
| 0.91 | 0.94 | 0.871 | 0.90 | -0.66% | |
| 0.977 | 0.977 | 0.902 | 0.906 | -3.72% | |
| 1.03 | 1.04 | 0.92 | 0.941 | -11.23% | |
| 0.991 | 1.07 | 0.961 | 1.06 | +8.50% | |
| 1.00 | 1.05 | 0.975 | 0.977 | -3.27% | |
| 1.02 | 1.06 | 0.98 | 1.01 | -5.61% | |
| 1.07 | 1.14 | 1.06 | 1.07 | +2.88% | |
| 1.08 | 1.09 | 1.00 | 1.04 | -0.95% | |
| 0.90 | 1.06 | 0.899 | 1.05 | +24.85% | |
| 0.80 | 0.863 | 0.80 | 0.841 | +6.59% | |
| 0.74 | 0.795 | 0.722 | 0.789 | +6.48% | |
| 0.75 | 0.77 | 0.732 | 0.741 | -0.80% | |
| 0.75 | 0.76 | 0.726 | 0.747 | -0.53% | |
| 0.775 | 0.783 | 0.738 | 0.751 | +5.63% | |
| 0.73 | 0.732 | 0.691 | 0.711 | -2.47% | |
| 0.74 | 0.773 | 0.728 | 0.729 | -2.54% | |
| 0.74 | 0.759 | 0.715 | 0.748 | 0.00% | |
| 0.795 | 0.796 | 0.745 | 0.748 | -3.36% | |
| 0.758 | 0.797 | 0.755 | 0.774 | +4.88% | |
| 0.759 | 0.775 | 0.725 | 0.738 | -3.40% | |
| 0.80 | 0.818 | 0.756 | 0.764 | -5.56% | |
| 0.856 | 0.859 | 0.807 | 0.809 | -6.47% | |
| 0.86 | 0.897 | 0.86 | 0.865 | +1.65% | |
| 0.89 | 0.90 | 0.83 | 0.851 | -5.23% | |
| 0.85 | 0.906 | 0.792 | 0.898 | +6.27% | |
| 0.866 | 0.875 | 0.831 | 0.845 | -1.86% | |
| 0.88 | 0.886 | 0.852 | 0.861 | -2.38% | |
| 0.929 | 0.936 | 0.881 | 0.882 | -5.16% | |
| 0.946 | 0.96 | 0.924 | 0.93 | -1.48% | |
| 0.955 | 0.98 | 0.941 | 0.944 | -0.63% | |
| 0.985 | 1.01 | 0.933 | 0.95 | -2.66% | |
| 1.02 | 1.02 | 0.95 | 0.976 | -7.05% | |
| 1.05 | 1.07 | 1.00 | 1.05 | +0.96% | |
| 0.94 | 1.10 | 0.935 | 1.04 | +12.31% | |
| 0.875 | 0.933 | 0.85 | 0.926 | +7.42% | |
| 0.89 | 0.90 | 0.842 | 0.862 | -5.27% | |
| 0.90 | 0.974 | 0.891 | 0.91 | 0.00% | |
| 0.948 | 0.975 | 0.91 | 0.91 | -4.01% | |
| 0.92 | 0.975 | 0.897 | 0.948 | +1.61% | |
| 0.93 | 0.955 | 0.91 | 0.933 | -2.41% | |
| 0.979 | 1.00 | 0.95 | 0.956 | -5.35% | |
| 1.01 | 1.03 | 0.969 | 1.01 | +2.02% | |
| 0.947 | 1.02 | 0.93 | 0.99 | +6.45% | |
| 0.91 | 0.955 | 0.91 | 0.93 | +1.97% | |
| 0.94 | 0.949 | 0.902 | 0.912 | -3.08% | |
| 0.958 | 0.963 | 0.932 | 0.941 | -2.08% | |
| 0.90 | 0.982 | 0.887 | 0.961 | +6.07% | |
| 0.962 | 0.977 | 0.90 | 0.906 | -3.51% | |
| 0.99 | 0.992 | 0.935 | 0.939 | -5.25% | |
| 0.99 | 1.05 | 0.989 | 0.991 | +1.64% | |
| 1.05 | 1.06 | 0.96 | 0.975 | -6.25% | |
| 1.12 | 1.12 | 1.01 | 1.04 | -5.45% | |
| 1.10 | 1.11 | 1.06 | 1.10 | +2.80% | |
| 1.09 | 1.09 | 1.02 | 1.07 | +0.47% | |
| 1.02 | 1.09 | 0.96 | 1.07 | +14.27% | |
| 1.03 | 1.04 | 0.925 | 0.932 | -9.51% | |
| 1.10 | 1.11 | 0.995 | 1.03 | -5.50% | |
| 1.11 | 1.13 | 1.05 | 1.09 | -0.91% | |
| 1.11 | 1.13 | 1.09 | 1.10 | -2.65% | |
| 1.16 | 1.19 | 1.11 | 1.13 | -3.42% | |
| 1.20 | 1.21 | 1.13 | 1.17 | -2.50% | |
| 1.23 | 1.24 | 1.17 | 1.20 | -2.44% | |
| 1.22 | 1.26 | 1.20 | 1.23 | +1.65% | |
| 1.25 | 1.27 | 1.21 | 1.21 | -3.20% | |
| 1.31 | 1.32 | 1.24 | 1.25 | -4.58% | |
| 1.23 | 1.33 | 1.22 | 1.31 | +6.50% | |
| 1.20 | 1.24 | 1.14 | 1.23 | +3.36% | |
| 1.21 | 1.24 | 1.18 | 1.19 | -6.30% | |
| 1.25 | 1.32 | 1.23 | 1.27 | +3.25% | |
| 1.29 | 1.30 | 1.23 | 1.23 | -3.15% | |
| 1.27 | 1.31 | 1.24 | 1.27 | 0.00% | |
| 1.25 | 1.32 | 1.20 | 1.27 | +4.96% | |
| 1.21 | 1.25 | 1.18 | 1.21 | -0.82% | |
| 1.27 | 1.28 | 1.21 | 1.22 | -2.40% | |
| 1.25 | 1.31 | 1.24 | 1.25 | -0.79% | |
| 1.29 | 1.32 | 1.26 | 1.26 | -1.56% | |
| 1.26 | 1.34 | 1.26 | 1.28 | +1.59% | |
| 1.19 | 1.31 | 1.19 | 1.26 | +8.62% | |
| 1.15 | 1.16 | 1.11 | 1.16 | +5.45% | |
| 1.11 | 1.15 | 1.07 | 1.10 | -0.90% | |
| 1.16 | 1.17 | 1.10 | 1.11 | -5.93% | |
| 1.21 | 1.26 | 1.17 | 1.18 | -4.07% | |
| 1.31 | 1.31 | 1.22 | 1.23 | -6.11% | |
| 1.24 | 1.33 | 1.24 | 1.31 | +6.50% | |
| 1.25 | 1.26 | 1.20 | 1.23 | -3.15% | |
| 1.28 | 1.32 | 1.25 | 1.27 | 0.00% | |
| 1.22 | 1.29 | 1.21 | 1.27 | +4.10% | |
| 1.24 | 1.31 | 1.21 | 1.22 | +1.67% | |
| 1.24 | 1.28 | 1.20 | 1.20 | -1.64% | |
| 1.21 | 1.26 | 1.18 | 1.22 | -0.81% | |
| 1.31 | 1.32 | 1.22 | 1.23 | -4.65% | |
| 1.40 | 1.43 | 1.29 | 1.29 | -7.86% | |
| 1.44 | 1.44 | 1.35 | 1.40 | -2.78% | |
| 1.42 | 1.45 | 1.39 | 1.44 | +1.41% | |
| 1.44 | 1.46 | 1.39 | 1.42 | -2.07% | |
| 1.47 | 1.54 | 1.41 | 1.45 | +0.69% | |
| 1.48 | 1.49 | 1.41 | 1.44 | -2.04% | |
| 1.34 | 1.49 | 1.34 | 1.47 | +8.09% | |
| 1.28 | 1.36 | 1.26 | 1.36 | +7.09% | |
| 1.30 | 1.34 | 1.27 | 1.27 | -1.55% | |
| 1.36 | 1.36 | 1.28 | 1.29 | -8.51% | |
| 1.36 | 1.43 | 1.36 | 1.41 | +4.44% | |
| 1.36 | 1.39 | 1.31 | 1.35 | 0.00% | |
| 1.36 | 1.37 | 1.29 | 1.35 | 0.00% | |
| 1.27 | 1.35 | 1.26 | 1.35 | +6.30% | |
| 1.22 | 1.28 | 1.19 | 1.27 | +2.42% | |
| 1.37 | 1.40 | 1.23 | 1.24 | -3.13% | |
| 1.27 | 1.38 | 1.25 | 1.28 | +0.79% | |
| 1.28 | 1.35 | 1.23 | 1.27 | -2.31% | |
| 1.37 | 1.41 | 1.26 | 1.30 | -5.11% | |
| 1.27 | 1.45 | 1.27 | 1.37 | -1.44% | |
| 1.50 | 1.52 | 1.38 | 1.39 | -8.55% | |
| 1.58 | 1.62 | 1.52 | 1.52 | -3.80% | |
| 1.59 | 1.65 | 1.55 | 1.58 | -0.94% | |
| 1.73 | 1.74 | 1.59 | 1.60 | +1.27% | |
| 1.55 | 1.62 | 1.46 | 1.58 | -4.55% | |
| 1.77 | 1.77 | 1.59 | 1.65 | -8.33% | |
| 1.85 | 1.89 | 1.77 | 1.80 | -2.17% | |
| 1.86 | 1.95 | 1.82 | 1.84 | -8.00% | |
| 2.15 | 2.19 | 1.95 | 2.00 | -6.98% | |
| 2.04 | 2.16 | 2.03 | 2.15 | +5.91% | |
| 2.05 | 2.12 | 2.02 | 2.03 | -5.14% | |
| 2.14 | 2.23 | 2.09 | 2.14 | -1.83% | |
| 2.31 | 2.32 | 2.14 | 2.18 | -6.84% | |
| 2.38 | 2.42 | 2.22 | 2.34 | +2.18% | |
| 2.32 | 2.44 | 2.26 | 2.29 | +4.09% | |
| 2.38 | 2.38 | 2.17 | 2.20 | 0.00% | |
| 2.22 | 2.34 | 2.00 | 2.20 | -5.98% | |
| 2.48 | 2.52 | 2.27 | 2.34 | -9.48% | |
| 2.42 | 2.73 | 2.39 | 2.59 | +13.38% | |
| 2.38 | 2.53 | 2.26 | 2.28 | -10.24% | |
| 2.81 | 3.10 | 2.50 | 2.54 | -3.42% | |
| 2.45 | 2.75 | 2.36 | 2.63 | +22.33% | |
| 2.01 | 2.26 | 1.96 | 2.15 | +3.37% | |
| 1.75 | 2.13 | 1.73 | 2.08 | +24.55% | |
| 1.81 | 1.95 | 1.66 | 1.67 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the QSI chart for longer ranges.