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

Quantum-Si logo
$0.03 +0.00 (+17.72%)
Closing price 05/19/2026 03:51 PM Eastern
Extended Trading
$0.03 +0.00 (+1.34%)
As of 05/19/2026 04:09 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 Massive. Learn more.

Quantum-Si Stock Price Performance

The Quantum-Si (QSIAW) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 96.17%, with a year-to-date return of -85.09%. In the past month, the stock has decreased 67.99%, reflecting recent market activity.

As of the latest close, Quantum-Si traded at $0.03 with a market cap of and volume of 16,326 shares.

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5 Day
Performance
-35.00%
1 Month
Performance
-67.99%
3 Month
Performance
-80.07%
Year-To-Date
Performance
-85.09%
1 Year
Performance
-96.17%

QSIAW Stock Chart for Wednesday, May, 20, 2026

Quantum-Si Stock Price History

DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization
05/19/2026$0.03$0.03
+18.65%
$0.03$0.0216,326 shs$0.00
05/18/2026$0.05$0.03
-45.22%
$0.05$0.0366,836 shs$0.00
05/15/2026$0.04$0.05
+4.07%
$0.05$0.033,532 shs$0.00
05/14/2026$0.04$0.04
+10.22%
$0.05$0.0355,555 shs$0.00
05/13/2026$0.04$0.04
-2.43%
$0.04$0.043,566 shs$0.00
05/12/2026$0.05$0.04
-9.87%
$0.05$0.043,320 shs$0.00
05/11/2026$0.06$0.05
-17.24%
$0.06$0.0421,113 shs$0.00
05/08/2026$0.07$0.06
-18.97%
$0.07$0.0519,999 shs$0.00
05/07/2026$0.06$0.07
+18.47%
$0.07$0.073,972 shs$0.00
05/06/2026$0.07$0.06
-15.59%
$0.07$0.0548,571 shs$0.00
05/05/2026N/A$0.07$0.07$0.0622,623 shs$0.00
04/30/2026$0.08$0.07
-5.19%
$0.10$0.0763,697 shs$0.00
04/29/2026$0.08$0.08
-2.16%
$0.08$0.075,279 shs$0.00
04/28/2026$0.09$0.08
-11.36%
$0.09$0.077,095 shs$0.00
04/27/2026$0.09$0.09
-0.56%
$0.09$0.091,503 shs$0.00
04/24/2026$0.09$0.09
+1.13%
$0.09$0.09458 shs$0.00
04/23/2026$0.08$0.09
+10.50%
$0.09$0.083,040 shs$0.00
04/22/2026$0.08$0.08
-1.11%
$0.08$0.077,790 shs$0.00
04/21/2026$0.09$0.08
-13.38%
$0.09$0.0721,083 shs$0.00
04/20/2026$0.09$0.09
+2.98%
$0.09$0.096,360 shs$0.00

This page (NASDAQ:QSIAW) was last updated on 5/20/2026 by MarketBeat.com Staff.
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