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

Quantum-Si logo
$1.74 +0.27 (+17.97%)
Closing price 04:00 PM Eastern
Extended Trading
$1.75 +0.01 (+0.63%)
As of 07:14 PM 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 decreased 1.14%, with a year-to-date return of -35.56%. In the past month, the stock has increased 53.98%, reflecting recent market activity.

As of the latest close, Quantum-Si traded at $1.48 with a market cap of $270.13 million and volume of 21.03 million shares.

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5 Day
Performance
+17.57%
1 Month
Performance
+53.98%
3 Month
Performance
+1.75%
Year-To-Date
Performance
-35.56%
1 Year
Performance
-1.14%

QSI Stock Chart for Thursday, May, 22, 2025

Quantum-Si Stock Price History

DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization
05/21/2025$1.68$1.48
-12.20%
$1.80$1.4521.03 million shs$270.13 million
05/20/2025$1.41$1.68
+19.15%
$1.73$1.4625.71 million shs$307.68 million
05/19/2025$1.48$1.41
-4.73%
$1.46$1.365.32 million shs$258.23 million
05/16/2025$1.48$1.48$1.52$1.408.59 million shs$271.05 million
05/15/2025$1.52$1.48
-2.63%
$1.55$1.458.69 million shs$271.05 million
05/14/2025$1.46$1.52
+4.11%
$1.60$1.449.31 million shs$278.37 million
05/13/2025$1.51$1.46
-3.31%
$1.59$1.437.00 million shs$267.38 million
05/12/2025$1.26$1.51
+19.84%
$1.52$1.329.55 million shs$276.54 million
05/09/2025$1.33$1.26
-5.26%
$1.34$1.243.62 million shs$230.76 million
05/08/2025$1.20$1.33
+10.83%
$1.35$1.246.25 million shs$243.58 million
05/07/2025$1.19$1.20
+0.84%
$1.22$1.162.31 million shs$219.77 million
05/06/2025$1.20$1.19
-0.83%
$1.20$1.151.88 million shs$217.94 million
05/05/2025$1.26$1.20
-4.76%
$1.25$1.172.98 million shs$219.77 million
05/02/2025$1.16$1.26
+8.62%
$1.28$1.184.41 million shs$230.76 million
05/01/2025$1.14$1.16
+1.75%
$1.17$1.122.09 million shs$212.44 million
04/30/2025$1.18$1.14
-3.39%
$1.15$1.102.87 million shs$208.78 million
04/29/2025$1.21$1.18
-2.48%
$1.23$1.182.56 million shs$216.11 million
04/28/2025$1.23$1.21
-1.63%
$1.27$1.172.64 million shs$221.60 million
04/25/2025$1.22$1.23
+0.82%
$1.25$1.193.20 million shs$225.26 million
04/24/2025$1.17$1.22
+4.27%
$1.24$1.182.80 million shs$223.43 million
04/23/2025$1.13$1.17
+3.54%
$1.24$1.153.39 million shs$214.27 million
04/22/2025$1.09$1.13
+3.67%
$1.15$1.101.83 million shs$206.95 million
04/21/2025$1.15$1.09
-5.22%
$1.13$1.081.71 million shs$199.62 million

This page (NASDAQ:QSI) was last updated on 5/22/2025 by MarketBeat.com Staff
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