Quantum-Si incorporated (QSI)
NASDAQ: QSI · Real-Time Price · USD
1.275
+0.095 (8.05%)
Sep 15, 2025, 3:34 PM EDT - Market open
Quantum-Si incorporated Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Sep 15, 2025 | 1.20 | 1.26 | 1.18 | 1.25 | - | 5.51% | 6,062,793 |
| Sep 12, 2025 | 1.22 | 1.26 | 1.17 | 1.18 | 1.18 | -1.67% | 6,110,612 |
| Sep 11, 2025 | 1.11 | 1.22 | 1.11 | 1.20 | 1.20 | 7.14% | 7,399,164 |
| Sep 10, 2025 | 1.15 | 1.16 | 1.08 | 1.12 | 1.12 | -2.61% | 4,230,873 |
| Sep 9, 2025 | 1.06 | 1.16 | 1.06 | 1.15 | 1.15 | 8.49% | 3,994,125 |
| Sep 8, 2025 | 1.09 | 1.10 | 1.04 | 1.06 | 1.06 | -1.85% | 4,089,700 |
| Sep 5, 2025 | 1.07 | 1.10 | 1.03 | 1.08 | 1.08 | 0.93% | 3,433,260 |
| Sep 4, 2025 | 1.07 | 1.08 | 1.03 | 1.07 | 1.07 | - | 3,698,750 |
| Sep 3, 2025 | 1.08 | 1.11 | 1.03 | 1.07 | 1.07 | -0.93% | 3,765,244 |
| Sep 2, 2025 | 1.10 | 1.13 | 1.07 | 1.08 | 1.08 | -3.57% | 4,078,682 |
| Aug 29, 2025 | 1.14 | 1.15 | 1.10 | 1.12 | 1.12 | -2.61% | 3,471,787 |
| Aug 28, 2025 | 1.19 | 1.22 | 1.13 | 1.15 | 1.15 | -0.86% | 4,261,908 |
| Aug 27, 2025 | 1.16 | 1.22 | 1.15 | 1.16 | 1.16 | -0.85% | 5,191,520 |
| Aug 26, 2025 | 1.13 | 1.18 | 1.11 | 1.17 | 1.17 | 2.63% | 3,624,365 |
| Aug 25, 2025 | 1.13 | 1.17 | 1.11 | 1.14 | 1.14 | - | 3,877,413 |
| Aug 22, 2025 | 1.10 | 1.16 | 1.06 | 1.14 | 1.14 | 2.70% | 6,872,459 |
| Aug 21, 2025 | 0.98 | 1.14 | 0.98 | 1.11 | 1.11 | 11.00% | 9,296,919 |
| Aug 20, 2025 | 1.01 | 1.02 | 0.95 | 1.00 | 1.00 | -2.91% | 11,048,277 |
| Aug 19, 2025 | 1.13 | 1.14 | 1.02 | 1.03 | 1.03 | -5.50% | 7,997,647 |
| Aug 18, 2025 | 1.11 | 1.12 | 1.09 | 1.09 | 1.09 | -0.91% | 4,931,097 |
| Aug 15, 2025 | 1.13 | 1.14 | 1.09 | 1.10 | 1.10 | -1.79% | 5,863,645 |
| Aug 14, 2025 | 1.18 | 1.19 | 1.08 | 1.12 | 1.12 | -4.27% | 9,810,755 |
| Aug 13, 2025 | 1.19 | 1.21 | 1.14 | 1.17 | 1.17 | 0.86% | 7,961,070 |
| Aug 12, 2025 | 1.20 | 1.22 | 1.14 | 1.16 | 1.16 | -3.33% | 9,882,629 |
| Aug 11, 2025 | 1.27 | 1.28 | 1.18 | 1.20 | 1.20 | -5.51% | 8,681,807 |
| Aug 8, 2025 | 1.33 | 1.35 | 1.26 | 1.27 | 1.27 | -4.51% | 6,536,088 |
| Aug 7, 2025 | 1.36 | 1.38 | 1.31 | 1.33 | 1.33 | -2.92% | 4,185,198 |
| Aug 6, 2025 | 1.36 | 1.39 | 1.27 | 1.37 | 1.37 | -4.86% | 8,481,578 |
| Aug 5, 2025 | 1.46 | 1.48 | 1.40 | 1.44 | 1.44 | - | 7,832,861 |
| Aug 4, 2025 | 1.49 | 1.49 | 1.43 | 1.44 | 1.44 | -1.37% | 4,385,133 |
| Aug 1, 2025 | 1.42 | 1.49 | 1.40 | 1.46 | 1.46 | -1.35% | 4,434,681 |
| Jul 31, 2025 | 1.62 | 1.62 | 1.47 | 1.48 | 1.48 | -8.64% | 11,156,626 |
| Jul 30, 2025 | 1.70 | 1.70 | 1.61 | 1.62 | 1.62 | -0.92% | 4,441,658 |
| Jul 29, 2025 | 1.80 | 1.80 | 1.60 | 1.64 | 1.64 | -8.66% | 9,424,027 |
| Jul 28, 2025 | 1.93 | 1.95 | 1.76 | 1.79 | 1.79 | -7.25% | 6,785,434 |
| Jul 25, 2025 | 1.97 | 1.98 | 1.85 | 1.93 | 1.93 | -2.53% | 7,424,730 |
| Jul 24, 2025 | 1.95 | 1.99 | 1.86 | 1.98 | 1.98 | 5.32% | 10,677,478 |
| Jul 23, 2025 | 1.83 | 1.90 | 1.77 | 1.88 | 1.88 | 4.44% | 8,536,946 |
| Jul 22, 2025 | 1.74 | 1.81 | 1.68 | 1.80 | 1.80 | 4.65% | 5,848,755 |
| Jul 21, 2025 | 1.78 | 1.80 | 1.71 | 1.72 | 1.72 | -2.27% | 5,667,910 |
| Jul 18, 2025 | 1.84 | 1.86 | 1.75 | 1.76 | 1.76 | -3.30% | 6,449,250 |
| Jul 17, 2025 | 1.81 | 1.85 | 1.79 | 1.82 | 1.82 | 1.11% | 6,462,155 |
| Jul 16, 2025 | 1.75 | 1.82 | 1.69 | 1.80 | 1.80 | 4.65% | 6,946,474 |
| Jul 15, 2025 | 1.78 | 1.78 | 1.68 | 1.72 | 1.72 | -0.58% | 5,424,614 |
| Jul 14, 2025 | 1.71 | 1.75 | 1.67 | 1.73 | 1.73 | - | 5,900,864 |
| Jul 11, 2025 | 1.80 | 1.82 | 1.72 | 1.73 | 1.73 | -4.42% | 6,159,729 |
| Jul 10, 2025 | 1.88 | 1.89 | 1.80 | 1.81 | 1.81 | -3.21% | 5,751,029 |
| Jul 9, 2025 | 1.82 | 1.88 | 1.74 | 1.87 | 1.87 | 3.31% | 8,557,464 |
| Jul 8, 2025 | 1.88 | 1.88 | 1.80 | 1.81 | 1.81 | -0.82% | 9,999,474 |
| Jul 7, 2025 | 1.92 | 1.95 | 1.81 | 1.83 | 1.83 | -14.72% | 16,643,756 |