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Quantum-Si incorporated

QSINASDAQHealthcareMedical Devices

$1.46Today:- (-)1Y −47.73%

As of Oct 26, 2026 close

Market cap
$317.99M
P/E (TTM)
-
Forward P/E
-
Dividend yield
-
52-week range
$0.69$2.52
Volume (live)
-
Avg. volume (3M)
8.90M

Quantum-Si incorporated (QSI) Historical Stock Prices

Analyze Quantum-Si incorporated (QSI) historical stock prices with comprehensive OHLC data, adjusted close prices, and daily trading volume. Access interactive price charts and detailed historical price data across multiple timeframes including daily, weekly, monthly, and yearly intervals for complete price history analysis.

Quantum-Si incorporated (QSI) Interactive Price Chart

Interactive historical price chart showing Quantum-Si incorporated stock price movements and trends across multiple time periods.

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QSI Historical Price Data Table

Complete historical stock price data with OHLC prices, adjusted close, and daily trading volume. Filter by time interval and date range for detailed price history analysis.

Filter Historical Data

Active filters: 6 Months · Daily127 records
Showing 1-50 of 127
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QSI historical price data table with daily, weekly, monthly, quarterly, and yearly trading intervals. Track Open, High, Low, Close, Adjusted Close prices, and trading volume to analyze price trends, technical patterns, and market activity for comprehensive price history analysis.
DateOpenHighLowCloseAdj CloseVolume
Oct 26, 20261.431.481.361.461.4610.35M
Oct 23, 20261.161.421.151.401.4011.46M
Oct 22, 20261.171.211.151.151.153.57M
Oct 21, 20261.161.231.161.231.233.42M
Oct 20, 20261.061.201.041.161.166.18M
Oct 19, 20261.151.151.011.091.098.71M
Oct 16, 20261.331.331.101.121.127.59M
Oct 15, 20261.351.391.241.311.319.22M
Oct 14, 20261.341.441.331.391.395.28M
Oct 13, 20261.341.461.311.411.416.20M
Oct 12, 20261.481.481.341.361.3610.21M
Oct 9, 20261.261.661.261.531.5340.54M
Oct 8, 20261.291.301.201.221.225.70M
Oct 7, 20261.171.311.091.281.287.95M
Oct 6, 20261.291.411.191.221.228.60M
Oct 5, 20261.521.531.261.281.2819.08M
Oct 2, 20261.391.551.171.551.5518.56M
Oct 1, 20261.201.481.151.431.4332.39M
Sep 30, 20260.961.120.961.071.0711.68M
Sep 29, 20260.811.030.810.960.9622.96M
Sep 28, 20260.820.830.800.800.801.57M
Sep 25, 20260.790.840.780.830.832.59M
Sep 24, 20260.750.800.740.790.791.59M
Sep 23, 20260.790.810.750.760.761.48M
Sep 22, 20260.760.790.750.780.782.43M
Sep 21, 20260.760.770.750.760.761.13M
Sep 18, 20260.790.800.740.750.751.71M
Sep 17, 20260.750.800.750.770.772.83M
Sep 16, 20260.720.750.720.730.73915.22K
Sep 15, 20260.720.740.720.720.721.17M
Sep 14, 20260.730.750.720.720.721.39M
Sep 11, 20260.740.760.740.740.741.07M
Sep 10, 20260.750.760.730.740.741.72M
Sep 9, 20260.760.770.750.750.751.45M
Sep 8, 20260.770.790.760.760.761.05M
Sep 4, 20260.760.770.760.770.77898.78K
Sep 3, 20260.770.790.760.760.76980.00K
Sep 2, 20260.760.790.750.760.761.62M
Sep 1, 20260.750.780.750.760.761.50M
Aug 31, 20260.780.780.760.770.771.13M
Aug 28, 20260.820.820.770.780.782.42M
Aug 27, 20260.790.830.790.800.801.38M
Aug 26, 20260.850.850.790.790.792.66M
Aug 25, 20260.790.860.780.850.854.37M
Aug 24, 20260.800.830.750.770.773.85M
Aug 21, 20260.780.930.780.830.837.83M
Aug 20, 20260.770.810.770.780.783.23M
Aug 19, 20260.720.780.720.770.772.86M
Aug 18, 20260.730.740.720.730.731.52M
Aug 17, 20260.740.800.740.740.742.43M
Show:
of 127

Source: Daily price history (open, high, low, close and volume). Data as of Oct 26, 2026. Data sources and methodology

Understanding Historical Stock Price Data & OHLC Metrics

Open Price
The price at which the stock opened for trading at the start of the trading session.
High Price
The highest price at which the stock traded during the trading session.
Low Price
The lowest price at which the stock traded during the trading session.
Close Price
The final price when trading closed for the session.
Adjusted Close Price
The closing price adjusted for corporate actions such as dividends, stock splits, and rights offerings. Used for accurate long-term historical price analysis and return calculations.
Volume
The total number of shares traded during the session, indicating trading activity and liquidity.