Quantum-Si incorporated (QSI)
NASDAQ: QSI · Real-Time Price · USD
1.220
-0.030 (-2.40%)
At close: Jan 9, 2026, 4:00 PM EST
1.202
-0.018 (-1.51%)
After-hours: Jan 9, 2026, 7:59 PM EST
Quantum-Si incorporated Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| 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 |
| Dec 31, 2025 | 1.11 | 1.15 | 1.07 | 1.10 | 1.10 | -0.90% | 5,902,294 |
| Dec 30, 2025 | 1.16 | 1.17 | 1.10 | 1.11 | 1.11 | -5.93% | 7,955,380 |
| Dec 29, 2025 | 1.21 | 1.26 | 1.17 | 1.18 | 1.18 | -4.07% | 8,021,451 |
| Dec 26, 2025 | 1.31 | 1.31 | 1.22 | 1.23 | 1.23 | -6.11% | 4,175,380 |
| Dec 24, 2025 | 1.24 | 1.33 | 1.24 | 1.31 | 1.31 | 6.50% | 4,344,521 |
| Dec 23, 2025 | 1.25 | 1.26 | 1.20 | 1.23 | 1.23 | -3.15% | 4,209,448 |
| Dec 22, 2025 | 1.28 | 1.32 | 1.25 | 1.27 | 1.27 | - | 5,156,059 |
| Dec 19, 2025 | 1.22 | 1.29 | 1.21 | 1.27 | 1.27 | 4.10% | 6,700,084 |
| Dec 18, 2025 | 1.24 | 1.31 | 1.21 | 1.22 | 1.22 | 1.67% | 3,418,947 |
| Dec 17, 2025 | 1.24 | 1.28 | 1.20 | 1.20 | 1.20 | -1.64% | 3,826,984 |
| Dec 16, 2025 | 1.21 | 1.26 | 1.18 | 1.22 | 1.22 | -0.81% | 4,898,602 |
| Dec 15, 2025 | 1.31 | 1.32 | 1.22 | 1.23 | 1.23 | -4.65% | 4,129,140 |
| Dec 12, 2025 | 1.40 | 1.43 | 1.29 | 1.29 | 1.29 | -7.86% | 5,641,030 |
| Dec 11, 2025 | 1.44 | 1.44 | 1.35 | 1.40 | 1.40 | -2.78% | 4,342,003 |
| Dec 10, 2025 | 1.42 | 1.45 | 1.39 | 1.44 | 1.44 | 1.41% | 3,567,291 |
| Dec 9, 2025 | 1.44 | 1.46 | 1.39 | 1.42 | 1.42 | -2.07% | 3,710,382 |
| Dec 8, 2025 | 1.47 | 1.54 | 1.41 | 1.45 | 1.45 | 0.69% | 3,170,964 |
| Dec 5, 2025 | 1.48 | 1.49 | 1.41 | 1.44 | 1.44 | -2.04% | 3,673,275 |
| Dec 4, 2025 | 1.34 | 1.49 | 1.34 | 1.47 | 1.47 | 8.09% | 5,885,608 |
| Dec 3, 2025 | 1.28 | 1.36 | 1.26 | 1.36 | 1.36 | 7.09% | 4,068,880 |
| Dec 2, 2025 | 1.30 | 1.34 | 1.27 | 1.27 | 1.27 | -1.55% | 3,326,862 |
| Dec 1, 2025 | 1.36 | 1.36 | 1.28 | 1.29 | 1.29 | -8.51% | 3,490,419 |
| Nov 28, 2025 | 1.36 | 1.43 | 1.36 | 1.41 | 1.41 | 4.44% | 2,455,624 |
| Nov 26, 2025 | 1.36 | 1.39 | 1.31 | 1.35 | 1.35 | - | 4,590,912 |
| Nov 25, 2025 | 1.36 | 1.37 | 1.29 | 1.35 | 1.35 | - | 3,544,906 |
| Nov 24, 2025 | 1.27 | 1.35 | 1.26 | 1.35 | 1.35 | 6.30% | 4,733,966 |
| Nov 21, 2025 | 1.22 | 1.28 | 1.19 | 1.27 | 1.27 | 2.42% | 5,215,927 |
| Nov 20, 2025 | 1.37 | 1.40 | 1.23 | 1.24 | 1.24 | -3.13% | 6,779,598 |
| Nov 19, 2025 | 1.27 | 1.38 | 1.25 | 1.28 | 1.28 | 0.79% | 5,939,770 |
| Nov 18, 2025 | 1.28 | 1.35 | 1.23 | 1.27 | 1.27 | -2.31% | 5,006,762 |
| Nov 17, 2025 | 1.37 | 1.41 | 1.26 | 1.30 | 1.30 | -5.11% | 4,656,763 |
| Nov 14, 2025 | 1.27 | 1.45 | 1.27 | 1.37 | 1.37 | -1.44% | 7,297,913 |
| Nov 13, 2025 | 1.50 | 1.52 | 1.38 | 1.39 | 1.39 | -8.55% | 7,063,552 |
| Nov 12, 2025 | 1.58 | 1.62 | 1.52 | 1.52 | 1.52 | -3.80% | 5,462,113 |
| Nov 11, 2025 | 1.59 | 1.65 | 1.55 | 1.58 | 1.58 | -0.94% | 4,498,553 |
| Nov 10, 2025 | 1.73 | 1.74 | 1.59 | 1.60 | 1.60 | 1.27% | 5,590,422 |
| Nov 7, 2025 | 1.55 | 1.62 | 1.46 | 1.58 | 1.58 | -4.55% | 9,690,597 |
| Nov 6, 2025 | 1.77 | 1.77 | 1.59 | 1.65 | 1.65 | -8.33% | 9,785,114 |
| Nov 5, 2025 | 1.85 | 1.89 | 1.77 | 1.80 | 1.80 | -2.17% | 8,577,197 |
| Nov 4, 2025 | 1.86 | 1.95 | 1.82 | 1.84 | 1.84 | -8.00% | 7,175,474 |
| Nov 3, 2025 | 2.15 | 2.19 | 1.95 | 2.00 | 2.00 | -6.98% | 9,521,727 |
| Oct 31, 2025 | 2.04 | 2.16 | 2.03 | 2.15 | 2.15 | 5.91% | 6,172,895 |
| Oct 30, 2025 | 2.05 | 2.12 | 2.02 | 2.03 | 2.03 | -5.14% | 6,739,675 |
| Oct 29, 2025 | 2.14 | 2.23 | 2.09 | 2.14 | 2.14 | -1.83% | 7,171,252 |