Quantum-Si Incorporated (QSI)
Showing Closing Date Range from Jul 28 to Oct 26, 2026 compared to Apr 28 to Jul 27, 2026.
Compare Last 3 Months with Previous Period
Investor Relations:quantum-si.com
Current Period Close
$1.40
Jul 28, 2026 - Oct 26, 2026
Previous Period Close
$0.78
Apr 28, 2026 - Jul 27, 2026
Net Comparison Delta
+$0.62 (+78.80%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(63 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Oct 23, 2026 | $1.40 | - | - | - |
| Oct 22, 2026 | $1.15 | Jul 27, 2026 | $0.78 | +46.87% |
| Oct 21, 2026 | $1.23 | Jul 24, 2026 | $0.77 | +59.74% |
| Oct 20, 2026 | $1.16 | Jul 23, 2026 | $0.79 | +46.84% |
| Oct 19, 2026 | $1.09 | Jul 22, 2026 | $0.80 | +36.25% |
| Oct 16, 2026 | $1.12 | Jul 21, 2026 | $0.84 | +33.97% |
| Oct 15, 2026 | $1.31 | Jul 20, 2026 | $0.82 | +60.34% |
| Oct 14, 2026 | $1.39 | Jul 17, 2026 | $0.82 | +69.10% |
| Oct 13, 2026 | $1.41 | Jul 16, 2026 | $0.82 | +72.16% |
| Oct 12, 2026 | $1.36 | Jul 15, 2026 | $0.86 | +57.77% |
| Oct 09, 2026 | $1.53 | Jul 14, 2026 | $0.87 | +76.67% |
| Oct 08, 2026 | $1.22 | Jul 13, 2026 | $0.87 | +40.39% |
| Oct 07, 2026 | $1.28 | Jul 10, 2026 | $0.88 | +44.96% |
| Oct 06, 2026 | $1.22 | Jul 09, 2026 | $0.96 | +26.82% |
| Oct 05, 2026 | $1.28 | Jul 08, 2026 | $0.91 | +40.20% |
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