Quantum-Si incorporated (QSI)
NASDAQ: QSI · Real-Time Price · USD
0.7600
-0.0060 (-0.78%)
At close: Sep 8, 2026, 4:00 PM EDT
0.7725
+0.0125 (1.64%)
After-hours: Sep 8, 2026, 7:54 PM EDT

Quantum-Si incorporated Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Sep 8, 20260.770.790.760.760.76-0.78%1,046,463
Sep 4, 20260.760.770.760.770.770.66%893,464
Sep 3, 20260.770.790.760.760.76-956,505
Sep 2, 20260.760.790.750.760.760.49%1,603,826
Sep 1, 20260.750.780.750.760.76-1.12%1,499,347
Aug 31, 20260.780.780.760.770.77-1.81%1,126,970
Aug 28, 20260.820.820.770.780.78-2.88%2,411,752
Aug 27, 20260.790.830.790.800.801.58%1,370,158
Aug 26, 20260.850.860.790.790.79-6.69%2,633,598
Aug 25, 20260.790.860.780.850.8510.14%4,325,292
Aug 24, 20260.800.830.750.770.77-7.87%3,808,634
Aug 21, 20260.780.930.780.840.847.05%7,724,359
Aug 20, 20260.770.810.770.780.781.29%3,226,576
Aug 19, 20260.720.780.720.770.775.78%2,854,279
Aug 18, 20260.730.740.720.730.73-2.18%1,504,758
Aug 17, 20260.740.800.740.740.740.59%2,423,934
Aug 14, 20260.750.770.710.740.74-6.35%6,958,558
Aug 13, 20260.860.910.790.790.79-5.66%4,107,477
Aug 12, 20260.830.870.830.840.842.10%1,469,484
Aug 11, 20260.800.850.800.820.823.81%2,026,474
Aug 10, 20260.820.840.790.790.79-2.98%2,422,839
Aug 7, 20260.760.830.760.810.817.87%2,708,369
Aug 6, 20260.750.780.750.760.76-0.20%1,451,230
Aug 5, 20260.780.790.760.760.76-1.16%2,466,598
Aug 4, 20260.760.800.760.770.772.60%3,984,739
Aug 3, 20260.720.760.710.750.754.72%2,706,253
Jul 31, 20260.730.750.710.710.71-1.06%1,840,507
Jul 30, 20260.730.740.690.720.722.52%3,557,133
Jul 29, 20260.760.780.700.700.70-7.67%4,102,774
Jul 28, 20260.780.780.740.760.76-2.91%3,268,923
Jul 27, 20260.790.810.770.780.781.73%1,086,514
Jul 24, 20260.790.800.760.770.77-2.52%2,588,776
Jul 23, 20260.790.830.780.790.79-1.25%3,288,670
Jul 22, 20260.810.850.800.800.80-4.31%2,843,612
Jul 21, 20260.820.850.820.840.842.33%1,470,894
Jul 20, 20260.830.840.810.820.82-0.66%1,502,339
Jul 17, 20260.820.850.800.820.820.38%2,295,009
Jul 16, 20260.850.860.810.820.82-4.95%3,743,406
Jul 15, 20260.870.900.860.860.86-0.48%2,255,407
Jul 14, 20260.870.900.860.870.87-0.36%1,213,247
Jul 13, 20260.880.880.850.870.87-1.52%3,532,949
Jul 10, 20260.950.950.880.880.88-8.28%2,906,641
Jul 9, 20260.910.970.900.960.965.45%2,575,863
Jul 8, 20260.890.930.890.910.91-0.74%3,422,649
Jul 7, 20260.940.950.900.920.92-3.38%3,710,303
Jul 6, 20260.930.980.930.950.952.29%2,626,554
Jul 2, 20260.931.010.920.930.930.68%6,037,313
Jul 1, 20260.880.960.880.920.924.42%5,506,506
Jun 30, 20260.880.920.870.890.89-0.44%3,187,245
Jun 29, 20260.860.910.850.890.893.99%3,989,704