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Quantum-Si (QSI) Stock Chart & Stock Price History

Quantum-Si logo
$1.44 0.00 (0.00%)
Closing price 08/5/2025 04:00 PM Eastern
Extended Trading
$1.40 -0.03 (-2.43%)
As of 05:19 AM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.

Quantum-Si Stock Price Performance

The Quantum-Si (QSI) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 65.23%, with a year-to-date return of -46.67%. In the past month, the stock has decreased 30.77%, reflecting recent market activity.

As of the latest close, Quantum-Si traded at $1.44 with a market cap of $264.24 million and volume of 7.62 million shares.

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5 Day
Performance
-1.37%
1 Month
Performance
-30.77%
3 Month
Performance
+21.01%
Year-To-Date
Performance
-46.67%
1 Year
Performance
+65.23%

QSI Stock Chart for Wednesday, August, 6, 2025

Quantum-Si Stock Price History

DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization
08/05/2025$1.44$1.44$1.48$1.407.62 million shs$264.24 million
08/04/2025$1.46$1.44
-1.37%
$1.49$1.434.30 million shs$267.91 million
08/01/2025$1.48$1.46
-1.35%
$1.49$1.404.41 million shs$267.91 million
07/31/2025$1.62$1.48
-8.64%
$1.62$1.4711.08 million shs$271.58 million
07/30/2025$1.64$1.62
-0.92%
$1.70$1.614.36 million shs$297.27 million
07/29/2025$1.79$1.64
-8.66%
$1.80$1.609.33 million shs$300.02 million
07/28/2025$1.93$1.79
-7.25%
$1.95$1.766.72 million shs$328.47 million
07/25/2025$1.98$1.93
-2.53%
$1.98$1.857.40 million shs$354.16 million
07/24/2025$1.88$1.98
+5.32%
$1.99$1.8610.59 million shs$363.33 million
07/23/2025$1.80$1.88
+4.44%
$1.90$1.778.43 million shs$344.98 million
07/22/2025$1.72$1.80
+4.65%
$1.81$1.685.82 million shs$330.30 million
07/21/2025$1.76$1.72
-2.27%
$1.80$1.715.61 million shs$315.62 million
07/18/2025$1.82$1.76
-3.30%
$1.86$1.756.34 million shs$322.96 million
07/17/2025$1.80$1.82
+1.11%
$1.85$1.796.34 million shs$333.97 million
07/16/2025$1.72$1.80
+4.65%
$1.82$1.696.87 million shs$330.30 million
07/15/2025$1.73$1.72
-0.58%
$1.78$1.685.40 million shs$315.62 million
07/14/2025$1.73$1.73$1.75$1.675.83 million shs$317.45 million
07/11/2025$1.81$1.73
-4.42%
$1.82$1.726.12 million shs$317.46 million
07/10/2025$1.87$1.81
-3.21%
$1.89$1.805.70 million shs$332.14 million
07/09/2025$1.81$1.87
+3.31%
$1.88$1.748.50 million shs$343.15 million
07/08/2025$1.83$1.81
-1.09%
$1.88$1.809.97 million shs$332.14 million
07/07/2025$2.08$1.83
-12.02%
$1.95$1.8116.54 million shs$335.80 million

This page (NASDAQ:QSI) was last updated on 8/6/2025 by MarketBeat.com Staff
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