stockNASDAQ: QSI • 28 Days Updates
Quantum-Si Incorporated (QSI)
Showing Closing Date Range from Sep 10 to Oct 8, 2026.
Investor Relations:quantum-si.com
Price & Performance Trajectory
Quantum-Si IncorporatedNASDAQ: QSI
Latest Close
$1.28
28 Days Updates Trajectory
Showing Closing Date Range from Sep 10 to Oct 8, 2026.Loading trajectory chart...
Click metric scorecards below to toggle price, return %, range & volume curvesQSI session performance
✓ Latest Close USD
$1.28
Latest session close
+$0.54vs period start
Period Return % % GAIN
+73.21%
Net period trajectory
Cumulative ReturnNormalized
High / Low Range SPREAD
$1.55 / $0.72
Period range envelope
$0.83channel spread
Total Volume SHARES
143.97M
Period turnover
Avg: 7.20M/dLiquidity
Historical Session Ledger
Daily open, high, low, and close prices with volume and period returns.
Historical Quotes & Breakdown(20 dates)
| Date | Close (USD) | Return % | High | Low | Volume |
|---|---|---|---|---|---|
| Oct 07, 2026 | $1.28 | +4.92% | $1.31 | $1.09 | 8.00M |
| Oct 06, 2026 | $1.22 | -4.69% | $1.41 | $1.19 | 8.70M |
| Oct 05, 2026 | $1.28 | -17.42% | $1.53 | $1.26 | 19.18M |
| Oct 02, 2026 | $1.55 | +8.39% | $1.55 | $1.17 | 18.77M |
| Oct 01, 2026 | $1.43 | +33.64% | $1.48 | $1.15 | 33.06M |
| Sep 30, 2026 | $1.07 | +11.69% | $1.12 | $0.96 | 13.84M |
| Sep 29, 2026 | $0.96 | +20.50% | $1.03 | $0.81 | 23.01M |
| Sep 28, 2026 | $0.80 | -4.68% | $0.83 | $0.80 | 1.56M |
| Sep 25, 2026 | $0.79 | +0.15% | $0.80 | $0.78 | 451.7K |
| Sep 24, 2026 | $0.79 | +3.43% | $0.80 | $0.74 | 1.58M |
| Sep 23, 2026 | $0.76 | -3.31% | $0.81 | $0.75 | 1.48M |
| Sep 22, 2026 | $0.79 | +3.84% | $0.79 | $0.75 | 2.43M |
| Sep 21, 2026 | $0.76 | +1.48% | $0.77 | $0.75 | 1.12M |
| Sep 18, 2026 | $0.75 | -3.25% | $0.80 | $0.74 | 1.71M |
| Sep 17, 2026 | $0.77 | +5.48% | $0.80 | $0.75 | 2.82M |
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