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QSI
Quantum-Si Incorporated Class A Common Stock
stock NASDAQ

At Close

Sep 29, 2026 3:59:48 PM EDT

0.9600USD+20.792%(+0.1650)22,869,241

0.9100Bid 1.00Ask 0.0900Spread

Pre-market

Sep 29, 2026 9:17:30 AM EDT

0.8154USD+2.566%(+0.0204)4,184

After-hours

Sep 29, 2026 4:59:30 PM EDT

0.9556USD-0.489%(-0.0047)64,631

OverviewOptionsHistoricalExchangesShort InterestMore

As of 2026-09-15, there were 13,046,142 shares short with a short interest of 7.67%.

Price

Price

Historical data is split-adjusted.

1) Data from Finra. Finra publishes an updated file every two weeks.

2) Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.

.dark-mode .pt01kG{ color: white; background-color: #333333; border: 2px solid white; }.light-mode .pt01kG{ color: #333333; background-color: white; border: 2px solid #333333; }QSIQuantum-Si Incorporated Class A Common Stockstock NASDAQ