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Quantum-Si Incorporated - Class A Common Stock
(NQ:
QSI
)
0.8918
+0.1118 (+14.33%)
Streaming Delayed Price
Updated: 11:51 AM EDT, Aug 21, 2026
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Price and Volume
Detailed Quote
Volume
3,032,042
Open
0.7848
Bid (Size)
0.8916 (100)
Ask (Size)
0.8980 (900)
Prev. Close
0.7800
Today's Range
0.7800 - 0.9114
52wk Range
0.6900 - 3.100
Shares Outstanding
N/A
Dividend Yield
N/A
Intraday
1 Week
1 Month
3 Month
1 Year
3 Year
5 Year
Top News
More News
Quantum-Si (QSI) Q2 2026 Earnings Call Transcript
↗
August 20, 2026
Proteus launch delayed to Q2 2027 as company cuts costs and eyes $4B market opportunity.
Via
The Motley Fool
Topics
Earnings
Quantum-Si to Participate in the H.C. Wainwright 28th Annual Global Investment Conference
August 18, 2026
From
Quantum-Si Incorporated
Via
GlobeNewswire
Performance
YTD
-23.1%
-23.1%
1 Month
+6.7%
+6.7%
3 Month
-9.9%
-9.9%
6 Month
-7.2%
-7.2%
1 Year
-10.8%
-10.8%
More News
Read More
Quantum-Si Q2 Earnings Call Highlights
↗
August 13, 2026
Via
MarketBeat
Topics
Earnings
Quantum-Si (QSI) Reports Q1 2026 Revenue Miss but Beats EPS Amid Proteus Launch Preparations
↗
May 07, 2026
Via
Chartmill
Full Transcript: Quantum-Si Q2 2026 Earnings Call
↗
August 13, 2026
Via
Benzinga
Topics
Earnings
Quantum-Si Reports Second Quarter 2026 Financial Results and Provides Proteus™ Development Update
August 13, 2026
From
Quantum-Si Incorporated
Via
GlobeNewswire
Quantum-Si to Report Second Quarter 2026 Financial Results on August 13, 2026
July 27, 2026
From
Quantum-Si Incorporated
Via
GlobeNewswire
Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)
June 16, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si and Cell Signaling Technology Partner to Advance Post-Translational Modification Analysis on Proteus™
June 10, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si Announces the Expansion of the Proteus™ Roadshow
June 03, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)
May 13, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si Q1 Earnings Call Highlights
↗
May 08, 2026
Via
MarketBeat
Topics
Earnings
Quantum-Si (QSI) Q1 2026 Earnings Transcript
↗
May 07, 2026
Via
The Motley Fool
Quantum-Si Reports First Quarter 2026 Financial Results and Highlights Proteus™ Development Milestones
May 07, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si to Participate in the H.C. Wainwright 4th Annual BioConnect Investor Conference at NASDAQ
May 01, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si Announces Successful Sequencing on Integrated Proteus™ Instruments
April 28, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Forget Neuralink: The Real Brain Tech Trade Has 10 Names You’ve Never Heard
↗
April 25, 2026
Via
InvestorPlace
Topics
Artificial Intelligence
Economy
Initial Public Offering
Quantum-Si to Report First Quarter 2026 Financial Results on May 7, 2026
April 16, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si Announces Two Customer Posters to be Presented at the American Association of Cancer Research Annual Meeting
April 15, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si Announces New Manuscript Demonstrating the Value of Single-molecule Protein Sequencing to Aid in Identifying New Cancer Treatment Strategies
April 14, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)
April 10, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si Announces First Customer Samples Tested on the Proteus™ Prototype System
April 08, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si Announces the Start of the Proteus™ Roadshow
April 06, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)
March 13, 2026
From
Quantum-Si Incorporated
Via
Business Wire
Quantum-Si (QSI) Q4 2025 Earnings Call Transcript
↗
March 03, 2026
Via
The Motley Fool
Topics
Earnings
Frequently Asked Questions
Is Quantum-Si Incorporated - Class A Common Stock publicly traded?
Yes, Quantum-Si Incorporated - Class A Common Stock is publicly traded.
What exchange does Quantum-Si Incorporated - Class A Common Stock trade on?
Quantum-Si Incorporated - Class A Common Stock trades on the Nasdaq Stock Market
What is the ticker symbol for Quantum-Si Incorporated - Class A Common Stock?
The ticker symbol for Quantum-Si Incorporated - Class A Common Stock is QSI on the Nasdaq Stock Market
What is the current price of Quantum-Si Incorporated - Class A Common Stock?
The current price of Quantum-Si Incorporated - Class A Common Stock is 0.8918
When was Quantum-Si Incorporated - Class A Common Stock last traded?
The last trade of Quantum-Si Incorporated - Class A Common Stock was at 08/21/26 11:51 AM ET
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