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    Quantum-Si Incorporated - Class A Common Stock (NQ:QSI)

    0.8473 +0.0780 (+10.14%)
    Streaming Delayed Price Updated: 4:00 PM EDT, Aug 25, 2026 Add to My Watchlist
    Quote
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    News
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    Quarterly Reports Insider Filings Other Filings

    Price and Volume

    Detailed Quote
    Volume 4,371,716
    Open 0.7888
    Bid (Size) 0.8452 (6,200)
    Ask (Size) 0.8459 (400)
    Prev. Close 0.7693
    Today's Range 0.7817 - 0.8590
    52wk Range 0.6900 - 3.100
    Shares Outstanding N/A
    Dividend Yield N/A
    Chart for (: )
    Intraday 1 Week 1 Month 3 Month 1 Year 3 Year 5 Year

    Top News

    More News
    News headline image
    Quantum-Si (QSI) Q2 2026 Earnings Call Transcript ↗
    Proteus launch delayed to Q2 2027 as company cuts costs and eyes $4B market opportunity. 
    Via The Motley Fool
    Topics Earnings
    News headline image
    Quantum-Si to Participate in the H.C. Wainwright 28th Annual Global Investment Conference
    From Quantum-Si Incorporated
    Via GlobeNewswire

    Performance

    YTD
    -27.0%
    -27.0%
    1 Month
    +8.2%
    +8.2%
    3 Month
    -21.5%
    -21.5%
    6 Month
    -8.9%
    -8.9%
    1 Year
    -25.7%
    -25.7%

    More News

    Read More
    News headline image
    Quantum-Si Q2 Earnings Call Highlights ↗
    Via MarketBeat
    Topics Earnings
    Quantum-Si (QSI) Reports Q1 2026 Revenue Miss but Beats EPS Amid Proteus Launch Preparations ↗
    Via Chartmill
    News headline image
    Full Transcript: Quantum-Si Q2 2026 Earnings Call ↗
    Via Benzinga
    Topics Earnings
    News headline image
    Quantum-Si Reports Second Quarter 2026 Financial Results and Provides Proteus™ Development Update
    From Quantum-Si Incorporated
    Via GlobeNewswire
    News headline image
    Quantum-Si to Report Second Quarter 2026 Financial Results on August 13, 2026
    From Quantum-Si Incorporated
    Via GlobeNewswire
    News headline image
    Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si and Cell Signaling Technology Partner to Advance Post-Translational Modification Analysis on Proteus™
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Announces the Expansion of the Proteus™ Roadshow
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Q1 Earnings Call Highlights ↗
    Via MarketBeat
    Topics Earnings
    News headline image
    Quantum-Si (QSI) Q1 2026 Earnings Transcript ↗
    Via The Motley Fool
    News headline image
    Quantum-Si Reports First Quarter 2026 Financial Results and Highlights Proteus™ Development Milestones
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si to Participate in the H.C. Wainwright 4th Annual BioConnect Investor Conference at NASDAQ
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Announces Successful Sequencing on Integrated Proteus™ Instruments
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Forget Neuralink: The Real Brain Tech Trade Has 10 Names You’ve Never Heard ↗
    Via InvestorPlace
    Topics Artificial Intelligence Economy Initial Public Offering
    News headline image
    Quantum-Si to Report First Quarter 2026 Financial Results on May 7, 2026
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Announces Two Customer Posters to be Presented at the American Association of Cancer Research Annual Meeting
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Announces New Manuscript Demonstrating the Value of Single-molecule Protein Sequencing to Aid in Identifying New Cancer Treatment Strategies
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Announces First Customer Samples Tested on the Proteus™ Prototype System
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Announces the Start of the Proteus™ Roadshow
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si (QSI) Q4 2025 Earnings Call Transcript ↗
    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 0.8473
    When was Quantum-Si Incorporated - Class A Common Stock last traded?
    The last trade of Quantum-Si Incorporated - Class A Common Stock was at 08/25/26 04:00 PM ET
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