sharethestock
/

Quantum-Si Incorporated Class A Common Stock (QSI)

XNAS: QSI · USD
$1.36at end of selection
−34.62%

−$0.72 per share

Oct 13, 2025 – Oct 12, 2026

Edit dates
→

Intraday times are shown in Eastern Time.

15-min delayed · Oct 12, 2026Drag to select ↔

Quantum-Si Incorporated Class A Common Stock (QSI) price history

Quantum-Si Incorporated Class A Common Stock trades under QSI on XNAS. Over Oct 13, 2025 – Oct 12, 2026, the available closing prices moved from $2.08 to $1.36, a change of −34.62%.

Prices through . 15-min delayed. Split-adjusted price change in USD; dividends are not included. These are historical observations, not a live quote.

Select dates in the chart to measure a price change, compare other assets, or calculate a hypothetical position’s gain or loss.

Browse all stock and ETF charts →