Quantum-Si incorporated (QSI)
NASDAQ: QSI · Real-Time Price · USD
0.9587
+0.0091 (0.96%)
Mar 16, 2026, 12:53 PM EDT - Market open
Quantum-Si incorporated Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Mar 16, 2026 | 0.96 | 0.98 | 0.94 | 0.95 | - | 0.13% | 1,414,671 |
| Mar 13, 2026 | 0.98 | 1.01 | 0.93 | 0.95 | 0.95 | -2.70% | 2,781,700 |
| Mar 12, 2026 | 1.02 | 1.02 | 0.95 | 0.98 | 0.98 | -7.05% | 3,954,431 |
| Mar 11, 2026 | 1.05 | 1.07 | 1.00 | 1.05 | 1.05 | 0.96% | 3,526,252 |
| Mar 10, 2026 | 0.94 | 1.10 | 0.94 | 1.04 | 1.04 | 12.32% | 8,413,383 |
| Mar 9, 2026 | 0.88 | 0.93 | 0.85 | 0.93 | 0.93 | 7.44% | 4,865,887 |
| Mar 6, 2026 | 0.89 | 0.90 | 0.84 | 0.86 | 0.86 | -5.24% | 5,626,389 |
| Mar 5, 2026 | 0.90 | 0.97 | 0.89 | 0.91 | 0.91 | -0.05% | 4,158,510 |
| Mar 4, 2026 | 0.95 | 0.98 | 0.91 | 0.91 | 0.91 | -4.01% | 2,873,100 |
| Mar 3, 2026 | 0.92 | 0.97 | 0.90 | 0.95 | 0.95 | 1.56% | 3,000,391 |
| Mar 2, 2026 | 0.93 | 0.96 | 0.91 | 0.93 | 0.93 | -2.40% | 1,797,558 |
| Feb 27, 2026 | 0.98 | 1.00 | 0.95 | 0.96 | 0.96 | -5.31% | 2,566,672 |
| Feb 26, 2026 | 1.01 | 1.03 | 0.97 | 1.01 | 1.01 | 2.01% | 2,249,643 |
| Feb 25, 2026 | 0.95 | 1.02 | 0.93 | 0.99 | 0.99 | 6.44% | 3,103,335 |
| Feb 24, 2026 | 0.91 | 0.95 | 0.91 | 0.93 | 0.93 | 2.01% | 1,348,225 |
| 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% | 1,739,432 |
| Feb 19, 2026 | 0.90 | 0.98 | 0.89 | 0.96 | 0.96 | 5.99% | 3,983,365 |
| Feb 18, 2026 | 0.96 | 0.98 | 0.90 | 0.91 | 0.91 | -3.45% | 4,899,185 |
| Feb 17, 2026 | 0.99 | 0.99 | 0.94 | 0.94 | 0.94 | -5.23% | 3,529,981 |
| Feb 13, 2026 | 0.99 | 1.05 | 0.99 | 0.99 | 0.99 | 1.59% | 3,089,288 |
| Feb 12, 2026 | 1.05 | 1.06 | 0.96 | 0.98 | 0.98 | -6.24% | 5,847,448 |
| Feb 11, 2026 | 1.12 | 1.12 | 1.01 | 1.04 | 1.04 | -5.45% | 4,038,842 |
| Feb 10, 2026 | 1.10 | 1.11 | 1.06 | 1.10 | 1.10 | 2.80% | 3,593,026 |
| Feb 9, 2026 | 1.09 | 1.09 | 1.02 | 1.07 | 1.07 | 0.47% | 3,105,765 |
| Feb 6, 2026 | 1.02 | 1.09 | 0.96 | 1.07 | 1.07 | 14.26% | 7,381,004 |
| Feb 5, 2026 | 1.03 | 1.04 | 0.92 | 0.93 | 0.93 | -9.50% | 8,117,180 |
| Feb 4, 2026 | 1.10 | 1.11 | 1.00 | 1.03 | 1.03 | -5.50% | 6,304,086 |
| Feb 3, 2026 | 1.11 | 1.13 | 1.05 | 1.09 | 1.09 | -0.91% | 5,027,494 |
| Feb 2, 2026 | 1.11 | 1.13 | 1.09 | 1.10 | 1.10 | -2.65% | 3,741,410 |
| Jan 30, 2026 | 1.16 | 1.19 | 1.11 | 1.13 | 1.13 | -3.42% | 5,411,907 |
| Jan 29, 2026 | 1.20 | 1.21 | 1.13 | 1.17 | 1.17 | -2.50% | 6,121,144 |
| Jan 28, 2026 | 1.23 | 1.24 | 1.17 | 1.20 | 1.20 | -2.44% | 3,851,182 |
| Jan 27, 2026 | 1.22 | 1.26 | 1.20 | 1.23 | 1.23 | 1.65% | 2,801,259 |
| Jan 26, 2026 | 1.25 | 1.27 | 1.21 | 1.21 | 1.21 | -3.20% | 3,088,906 |
| Jan 23, 2026 | 1.31 | 1.32 | 1.24 | 1.25 | 1.25 | -4.58% | 4,036,112 |
| Jan 22, 2026 | 1.23 | 1.33 | 1.22 | 1.31 | 1.31 | 6.50% | 6,352,030 |
| Jan 21, 2026 | 1.20 | 1.24 | 1.14 | 1.23 | 1.23 | 3.36% | 4,896,116 |
| Jan 20, 2026 | 1.21 | 1.24 | 1.18 | 1.19 | 1.19 | -6.30% | 5,641,105 |
| Jan 16, 2026 | 1.25 | 1.32 | 1.23 | 1.27 | 1.27 | 3.25% | 5,377,801 |
| Jan 15, 2026 | 1.29 | 1.30 | 1.23 | 1.23 | 1.23 | -3.15% | 3,656,506 |
| Jan 14, 2026 | 1.27 | 1.31 | 1.24 | 1.27 | 1.27 | - | 4,337,857 |
| Jan 13, 2026 | 1.25 | 1.32 | 1.20 | 1.27 | 1.27 | 4.96% | 5,510,845 |
| Jan 12, 2026 | 1.21 | 1.25 | 1.18 | 1.21 | 1.21 | -0.82% | 4,684,250 |
| Jan 9, 2026 | 1.27 | 1.28 | 1.21 | 1.22 | 1.22 | -2.40% | 4,421,206 |
| Jan 8, 2026 | 1.25 | 1.31 | 1.24 | 1.25 | 1.25 | -0.79% | 4,893,077 |
| Jan 7, 2026 | 1.29 | 1.32 | 1.26 | 1.26 | 1.26 | -1.56% | 4,107,769 |
| Jan 6, 2026 | 1.26 | 1.34 | 1.26 | 1.28 | 1.28 | 1.59% | 7,655,044 |
| Jan 5, 2026 | 1.19 | 1.31 | 1.19 | 1.26 | 1.26 | 8.62% | 8,340,539 |
| Jan 2, 2026 | 1.15 | 1.16 | 1.11 | 1.16 | 1.16 | 5.45% | 4,871,648 |