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QSI — Quantum-Si Incorporated Class A Common Stock
NasdaqQuantum-Si Incorporated Class A Common Stock
$1.43
+0.36(+33.64%)
- O
- 1.20
- H
- 1.48
- L
- 1.15
- V
- 32.31M
⏱️ End-of-day dataAs of Oct 1, 2026
Latest Close$1.43
Period Return+31.19%
Period High$3.10
Period Low$0.69
Avg Daily Volume6.67M
Total Trading Days365
QSI — Historical OHLCV Price & Volume Table
Apr 21, 2025 — Oct 1, 2026| Date▼ | Open⇅ | High⇅ | Low⇅ | Close⇅ | Change ($)⇅ | Change (%)⇅ | Volume⇅ | VWAP⇅ | Day Range (L - H) |
|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2026 | $1.20 | $1.48 | $1.15 | $1.43 | +$0.36 | +33.64% | 32,305,820 | $1.34 | $1.15 $1.48 |
| Sep 30, 2026 | $0.96 | $1.12 | $0.96 | $1.07 | +$0.11 | +11.68% | 13,838,833 | $1.09 | $0.96 $1.12 |
| Sep 29, 2026 | $0.81 | $1.03 | $0.81 | $0.96 | +$0.16 | +20.52% | 23,007,124 | $0.96 | $0.81 $1.03 |
| Sep 28, 2026 | $0.83 | $0.83 | $0.80 | $0.80 | $-0.04 | -4.71% | 1,567,027 | $0.82 | $0.80 $0.83 |
| Sep 25, 2026 | $0.79 | $0.84 | $0.78 | $0.83 | +$0.05 | +6.28% | 2,593,483 | $0.81 | $0.78 $0.84 |
| Sep 24, 2026 | $0.75 | $0.80 | $0.74 | $0.79 | +$0.03 | +3.47% | 1,593,305 | $0.77 | $0.74 $0.80 |
| Sep 23, 2026 | $0.79 | $0.81 | $0.75 | $0.76 | $-0.03 | -3.31% | 1,476,525 | $0.77 | $0.75 $0.81 |
| Sep 22, 2026 | $0.76 | $0.79 | $0.75 | $0.78 | +$0.03 | +3.81% | 2,429,915 | $0.77 | $0.75 $0.79 |
| Sep 21, 2026 | $0.76 | $0.77 | $0.75 | $0.76 | +$0.01 | +1.45% | 1,126,539 | $0.76 | $0.75 $0.77 |
| Sep 18, 2026 | $0.79 | $0.80 | $0.74 | $0.75 | $-0.02 | -3.23% | 1,713,327 | $0.76 | $0.74 $0.80 |
| Sep 17, 2026 | $0.75 | $0.80 | $0.75 | $0.77 | +$0.04 | +5.47% | 2,824,984 | $0.78 | $0.75 $0.80 |
| Sep 16, 2026 | $0.72 | $0.75 | $0.72 | $0.73 | +$0.01 | +1.40% | 915,220 | $0.74 | $0.72 $0.75 |
| Sep 15, 2026 | $0.72 | $0.74 | $0.72 | $0.72 | $-0.01 | -0.69% | 1,154,899 | $0.73 | $0.72 $0.74 |
| Sep 14, 2026 | $0.73 | $0.75 | $0.72 | $0.73 | $-0.02 | -2.03% | 1,385,634 | $0.73 | $0.72 $0.75 |
| Sep 11, 2026 | $0.74 | $0.76 | $0.74 | $0.74 | +$0.00 | +0.12% | 1,074,255 | $0.75 | $0.74 $0.76 |
| Sep 10, 2026 | $0.75 | $0.76 | $0.73 | $0.74 | $-0.01 | -1.45% | 1,715,326 | $0.74 | $0.73 $0.76 |
| Sep 9, 2026 | $0.76 | $0.77 | $0.75 | $0.75 | $-0.01 | -1.32% | 1,449,017 | $0.75 | $0.75 $0.77 |
| Sep 8, 2026 | $0.77 | $0.79 | $0.76 | $0.76 | $-0.01 | -0.78% | 1,054,362 | $0.78 | $0.76 $0.79 |
| Sep 4, 2026 | $0.76 | $0.77 | $0.76 | $0.77 | +$0.01 | +0.66% | 898,781 | $0.77 | $0.76 $0.77 |
| Sep 3, 2026 | $0.77 | $0.79 | $0.76 | $0.76 | +$0.00 | +0.00% | 979,997 | $0.77 | $0.76 $0.79 |
| Sep 2, 2026 | $0.76 | $0.79 | $0.75 | $0.76 | +$0.00 | +0.49% | 1,603,827 | $0.76 | $0.75 $0.79 |
| Sep 1, 2026 | $0.75 | $0.78 | $0.75 | $0.76 | $-0.01 | -1.12% | 1,504,027 | $0.76 | $0.75 $0.78 |
| Aug 31, 2026 | $0.78 | $0.78 | $0.76 | $0.77 | $-0.01 | -1.81% | 1,130,895 | $0.77 | $0.76 $0.78 |
| Aug 28, 2026 | $0.82 | $0.82 | $0.77 | $0.78 | $-0.02 | -2.88% | 2,417,640 | $0.78 | $0.77 $0.82 |
| Aug 27, 2026 | $0.79 | $0.83 | $0.79 | $0.80 | +$0.01 | +1.58% | 1,375,317 | $0.82 | $0.79 $0.83 |
| Aug 26, 2026 | $0.85 | $0.86 | $0.79 | $0.79 | $-0.06 | -6.69% | 2,662,929 | $0.81 | $0.79 $0.86 |
| Aug 25, 2026 | $0.79 | $0.86 | $0.78 | $0.85 | +$0.08 | +10.14% | 4,371,715 | $0.84 | $0.78 $0.86 |
| Aug 24, 2026 | $0.80 | $0.83 | $0.75 | $0.77 | $-0.07 | -7.87% | 3,853,818 | $0.78 | $0.75 $0.83 |
| Aug 21, 2026 | $0.78 | $0.93 | $0.78 | $0.84 | +$0.06 | +7.05% | 7,825,143 | $0.88 | $0.78 $0.93 |
| Aug 20, 2026 | $0.77 | $0.81 | $0.77 | $0.78 | +$0.01 | +1.29% | 3,226,576 | $0.79 | $0.77 $0.81 |