Quantum-Si incorporated (QSI)
NASDAQ: QSI · Real-Time Price · USD
0.8670
-0.0450 (-4.93%)
Apr 29, 2026, 3:30 PM EDT - Market open
Quantum-Si incorporated Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Apr 29, 2026 | 0.90 | 0.91 | 0.86 | 0.87 | - | -5.08% | 2,439,573 |
| Apr 28, 2026 | 0.89 | 0.94 | 0.89 | 0.91 | 0.91 | 1.30% | 3,159,350 |
| Apr 27, 2026 | 0.91 | 0.94 | 0.87 | 0.90 | 0.90 | -0.61% | 3,118,018 |
| Apr 24, 2026 | 0.98 | 0.98 | 0.90 | 0.91 | 0.91 | -3.70% | 7,282,600 |
| Apr 23, 2026 | 1.03 | 1.04 | 0.92 | 0.94 | 0.94 | -11.26% | 7,311,019 |
| Apr 22, 2026 | 0.99 | 1.07 | 0.96 | 1.06 | 1.06 | 8.50% | 11,054,678 |
| Apr 21, 2026 | 1.00 | 1.05 | 0.98 | 0.98 | 0.98 | -3.27% | 5,203,062 |
| Apr 20, 2026 | 1.02 | 1.06 | 0.98 | 1.01 | 1.01 | -5.61% | 7,820,642 |
| Apr 17, 2026 | 1.07 | 1.14 | 1.06 | 1.07 | 1.07 | 2.88% | 7,021,500 |
| Apr 16, 2026 | 1.08 | 1.09 | 1.00 | 1.04 | 1.04 | -0.95% | 7,641,472 |
| Apr 15, 2026 | 0.90 | 1.06 | 0.90 | 1.05 | 1.05 | 24.88% | 17,707,467 |
| Apr 14, 2026 | 0.80 | 0.86 | 0.80 | 0.84 | 0.84 | 6.61% | 3,070,566 |
| Apr 13, 2026 | 0.74 | 0.79 | 0.72 | 0.79 | 0.79 | 6.51% | 2,650,507 |
| Apr 10, 2026 | 0.75 | 0.77 | 0.73 | 0.74 | 0.74 | -0.86% | 1,881,862 |
| Apr 9, 2026 | 0.75 | 0.76 | 0.73 | 0.75 | 0.75 | -0.48% | 2,638,571 |
| Apr 8, 2026 | 0.78 | 0.78 | 0.74 | 0.75 | 0.75 | 5.50% | 3,188,982 |
| Apr 7, 2026 | 0.73 | 0.73 | 0.69 | 0.71 | 0.71 | -2.43% | 3,515,255 |
| Apr 6, 2026 | 0.74 | 0.77 | 0.73 | 0.73 | 0.73 | -2.50% | 1,890,500 |
| Apr 2, 2026 | 0.74 | 0.76 | 0.72 | 0.75 | 0.75 | 0.03% | 2,571,803 |
| Apr 1, 2026 | 0.79 | 0.80 | 0.75 | 0.75 | 0.75 | -3.41% | 2,354,460 |
| Mar 31, 2026 | 0.76 | 0.80 | 0.76 | 0.77 | 0.77 | 4.91% | 2,872,471 |
| Mar 30, 2026 | 0.76 | 0.78 | 0.73 | 0.74 | 0.74 | -3.44% | 3,758,169 |
| Mar 27, 2026 | 0.80 | 0.82 | 0.76 | 0.76 | 0.76 | -5.52% | 3,169,678 |
| Mar 26, 2026 | 0.86 | 0.86 | 0.81 | 0.81 | 0.81 | -6.51% | 2,619,269 |
| Mar 25, 2026 | 0.86 | 0.90 | 0.86 | 0.87 | 0.87 | 1.63% | 2,549,869 |
| Mar 24, 2026 | 0.89 | 0.90 | 0.83 | 0.85 | 0.85 | -5.22% | 2,660,281 |
| Mar 23, 2026 | 0.85 | 0.91 | 0.79 | 0.90 | 0.90 | 6.26% | 4,568,838 |
| Mar 20, 2026 | 0.87 | 0.88 | 0.83 | 0.85 | 0.85 | -1.88% | 3,813,291 |
| Mar 19, 2026 | 0.88 | 0.89 | 0.85 | 0.86 | 0.86 | -2.39% | 2,419,119 |
| Mar 18, 2026 | 0.93 | 0.94 | 0.88 | 0.88 | 0.88 | -5.14% | 3,158,802 |
| Mar 17, 2026 | 0.95 | 0.96 | 0.92 | 0.93 | 0.93 | -1.41% | 2,787,347 |
| Mar 16, 2026 | 0.96 | 0.98 | 0.94 | 0.94 | 0.94 | -0.64% | 2,701,770 |
| Mar 13, 2026 | 0.98 | 1.01 | 0.93 | 0.95 | 0.95 | -2.70% | 2,835,009 |
| Mar 12, 2026 | 1.02 | 1.02 | 0.95 | 0.98 | 0.98 | -7.05% | 3,977,826 |
| Mar 11, 2026 | 1.05 | 1.07 | 1.00 | 1.05 | 1.05 | 0.96% | 3,613,642 |
| Mar 10, 2026 | 0.94 | 1.10 | 0.94 | 1.04 | 1.04 | 12.32% | 8,474,557 |
| Mar 9, 2026 | 0.88 | 0.93 | 0.85 | 0.93 | 0.93 | 7.44% | 4,955,006 |
| Mar 6, 2026 | 0.89 | 0.90 | 0.84 | 0.86 | 0.86 | -5.24% | 5,636,902 |
| Mar 5, 2026 | 0.90 | 0.97 | 0.89 | 0.91 | 0.91 | -0.05% | 4,219,538 |
| Mar 4, 2026 | 0.95 | 0.98 | 0.91 | 0.91 | 0.91 | -4.01% | 2,970,475 |
| Mar 3, 2026 | 0.92 | 0.97 | 0.90 | 0.95 | 0.95 | 1.56% | 3,196,938 |
| Mar 2, 2026 | 0.93 | 0.96 | 0.91 | 0.93 | 0.93 | -2.40% | 1,840,206 |
| Feb 27, 2026 | 0.98 | 1.00 | 0.95 | 0.96 | 0.96 | -5.31% | 2,595,522 |
| Feb 26, 2026 | 1.01 | 1.03 | 0.97 | 1.01 | 1.01 | 2.01% | 2,267,939 |
| Feb 25, 2026 | 0.95 | 1.02 | 0.93 | 0.99 | 0.99 | 6.44% | 3,162,889 |
| Feb 24, 2026 | 0.91 | 0.95 | 0.91 | 0.93 | 0.93 | 2.01% | 1,370,156 |
| Feb 23, 2026 | 0.94 | 0.95 | 0.90 | 0.91 | 0.91 | -3.07% | 1,888,673 |
| Feb 20, 2026 | 0.96 | 0.96 | 0.93 | 0.94 | 0.94 | -2.07% | 1,754,682 |
| Feb 19, 2026 | 0.90 | 0.98 | 0.89 | 0.96 | 0.96 | 5.99% | 3,993,492 |
| Feb 18, 2026 | 0.96 | 0.98 | 0.90 | 0.91 | 0.91 | -3.45% | 4,913,424 |