Quantum-Si (QSI)
NASDAQ: QSI
· Real-Time Price · USD
1.06
-0.02 (-1.85%)
At close: Sep 08, 2025, 3:59 PM
1.05
-0.94%
After-hours: Sep 08, 2025, 04:56 PM EDT
QSI Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj Close | % Change | Volume |
|---|---|---|---|---|---|---|---|
| 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 | 0.00% | 3,698,800 |
| Sep 3, 2025 | 1.08 | 1.11 | 1.03 | 1.07 | 1.07 | -0.93% | 3,838,600 |
| Sep 2, 2025 | 1.10 | 1.13 | 1.07 | 1.08 | 1.08 | -3.57% | 4,078,700 |
| Aug 29, 2025 | 1.14 | 1.15 | 1.10 | 1.12 | 1.12 | -2.61% | 3,471,800 |
| 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% | 3,624,400 |
| Aug 25, 2025 | 1.13 | 1.17 | 1.11 | 1.14 | 1.14 | 0.00% | 3,877,413 |
| Aug 22, 2025 | 1.10 | 1.16 | 1.06 | 1.14 | 1.14 | 2.70% | 6,872,500 |
| 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% | 11,048,300 |
| 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% | 4,931,100 |
| 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% | 9,810,800 |
| Aug 13, 2025 | 1.19 | 1.21 | 1.14 | 1.17 | 1.17 | 0.86% | 7,961,100 |
| 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% | 6,536,100 |