Quantum-Si incorporated (QSI)
NASDAQ: QSI · Real-Time Price · USD
0.8224
+0.0031 (0.38%)
At close: Jul 17, 2026, 4:00 PM EDT
0.8225
+0.0001 (0.01%)
After-hours: Jul 17, 2026, 7:57 PM EDT
Quantum-Si incorporated Stock Price History
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Jul 17, 2026 | 0.82 | 0.85 | 0.80 | 0.82 | 0.82 | 0.38% | 2,280,948 |
| Jul 16, 2026 | 0.85 | 0.86 | 0.81 | 0.82 | 0.82 | -4.95% | 3,698,316 |
| Jul 15, 2026 | 0.87 | 0.90 | 0.86 | 0.86 | 0.86 | -0.48% | 2,243,427 |
| Jul 14, 2026 | 0.87 | 0.90 | 0.86 | 0.87 | 0.87 | -0.36% | 1,206,085 |
| Jul 13, 2026 | 0.88 | 0.88 | 0.85 | 0.87 | 0.87 | -1.52% | 3,514,120 |
| Jul 10, 2026 | 0.95 | 0.95 | 0.88 | 0.88 | 0.88 | -8.28% | 2,870,582 |
| Jul 9, 2026 | 0.91 | 0.97 | 0.90 | 0.96 | 0.96 | 5.45% | 2,553,281 |
| Jul 8, 2026 | 0.89 | 0.93 | 0.89 | 0.91 | 0.91 | -0.74% | 3,396,625 |
| Jul 7, 2026 | 0.94 | 0.95 | 0.90 | 0.92 | 0.92 | -3.38% | 3,710,303 |
| Jul 6, 2026 | 0.93 | 0.98 | 0.93 | 0.95 | 0.95 | 2.29% | 2,626,554 |
| Jul 2, 2026 | 0.93 | 1.01 | 0.92 | 0.93 | 0.93 | 0.68% | 6,037,313 |
| Jul 1, 2026 | 0.88 | 0.96 | 0.88 | 0.92 | 0.92 | 4.42% | 5,506,506 |
| Jun 30, 2026 | 0.88 | 0.92 | 0.87 | 0.89 | 0.89 | -0.44% | 3,187,245 |
| Jun 29, 2026 | 0.86 | 0.91 | 0.85 | 0.89 | 0.89 | 3.99% | 3,989,704 |
| Jun 26, 2026 | 0.84 | 0.89 | 0.80 | 0.85 | 0.85 | -0.29% | 18,909,693 |
| Jun 25, 2026 | 0.85 | 0.89 | 0.78 | 0.86 | 0.86 | 3.64% | 8,412,380 |
| Jun 24, 2026 | 0.90 | 0.92 | 0.83 | 0.83 | 0.83 | -6.00% | 5,134,233 |
| Jun 23, 2026 | 0.91 | 0.93 | 0.88 | 0.88 | 0.88 | -4.47% | 5,546,420 |
| Jun 22, 2026 | 1.00 | 1.07 | 0.92 | 0.92 | 0.92 | -7.79% | 5,934,924 |
| Jun 18, 2026 | 0.96 | 1.03 | 0.96 | 1.00 | 1.00 | 5.79% | 6,343,780 |
| Jun 17, 2026 | 0.97 | 1.00 | 0.93 | 0.94 | 0.94 | -1.02% | 3,473,136 |
| Jun 16, 2026 | 1.00 | 1.00 | 0.94 | 0.95 | 0.95 | -3.49% | 3,727,901 |
| Jun 15, 2026 | 1.01 | 1.05 | 0.98 | 0.99 | 0.99 | 4.42% | 9,422,150 |
| Jun 12, 2026 | 0.98 | 1.01 | 0.93 | 0.95 | 0.95 | -2.70% | 3,328,009 |
| Jun 11, 2026 | 0.95 | 0.98 | 0.92 | 0.97 | 0.97 | 2.80% | 3,444,732 |
| Jun 10, 2026 | 0.98 | 1.02 | 0.95 | 0.95 | 0.95 | -4.11% | 3,451,896 |
| Jun 9, 2026 | 1.06 | 1.08 | 0.94 | 0.99 | 0.99 | -6.88% | 8,116,900 |
| Jun 8, 2026 | 1.09 | 1.10 | 1.03 | 1.06 | 1.06 | 0.95% | 4,310,428 |
| Jun 5, 2026 | 1.25 | 1.25 | 1.01 | 1.05 | 1.05 | -17.97% | 8,905,019 |
| Jun 4, 2026 | 1.19 | 1.30 | 1.17 | 1.28 | 1.28 | 7.56% | 9,559,236 |
| Jun 3, 2026 | 1.22 | 1.22 | 1.16 | 1.19 | 1.19 | -4.03% | 7,952,203 |
| Jun 2, 2026 | 1.17 | 1.26 | 1.16 | 1.24 | 1.24 | 5.08% | 7,380,077 |
| Jun 1, 2026 | 1.17 | 1.25 | 1.12 | 1.18 | 1.18 | -0.84% | 7,407,284 |
| May 29, 2026 | 1.21 | 1.21 | 1.11 | 1.19 | 1.19 | -0.83% | 7,289,734 |
| May 28, 2026 | 1.11 | 1.21 | 1.08 | 1.20 | 1.20 | 6.19% | 7,411,582 |
| May 27, 2026 | 1.06 | 1.19 | 1.03 | 1.13 | 1.13 | 4.63% | 8,573,709 |
| May 26, 2026 | 1.08 | 1.09 | 1.01 | 1.08 | 1.08 | 1.89% | 7,550,891 |
| May 22, 2026 | 1.00 | 1.09 | 1.00 | 1.06 | 1.06 | 7.07% | 8,816,195 |
| May 21, 2026 | 0.87 | 0.99 | 0.87 | 0.99 | 0.99 | 13.05% | 11,368,930 |
| May 20, 2026 | 0.87 | 0.88 | 0.84 | 0.88 | 0.88 | 1.71% | 4,706,237 |
| May 19, 2026 | 0.85 | 0.87 | 0.82 | 0.86 | 0.86 | 0.83% | 3,116,017 |
| May 18, 2026 | 0.90 | 0.90 | 0.83 | 0.85 | 0.85 | -4.07% | 4,577,467 |
| May 15, 2026 | 0.91 | 0.91 | 0.88 | 0.89 | 0.89 | -4.59% | 3,706,076 |
| May 14, 2026 | 0.93 | 0.96 | 0.91 | 0.93 | 0.93 | 0.38% | 4,436,223 |
| May 13, 2026 | 0.93 | 0.96 | 0.90 | 0.93 | 0.93 | -1.60% | 4,868,987 |
| May 12, 2026 | 0.92 | 1.03 | 0.90 | 0.94 | 0.94 | 2.42% | 10,063,496 |
| May 11, 2026 | 0.90 | 0.95 | 0.89 | 0.92 | 0.92 | 1.72% | 5,786,596 |
| May 8, 2026 | 0.95 | 0.97 | 0.88 | 0.91 | 0.91 | -7.55% | 13,192,853 |
| May 7, 2026 | 1.03 | 1.03 | 0.96 | 0.98 | 0.98 | -4.80% | 7,220,967 |
| May 6, 2026 | 0.97 | 1.04 | 0.96 | 1.03 | 1.03 | 7.15% | 8,075,250 |