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

    0.8618 -0.0477 (-5.24%)
    Official Closing Price Updated: 4:15 PM EST, Mar 6, 2026 Add to My Watchlist
    Quote
    Overview Detailed Quote Charting Historical Prices
    News
    All News News Headlines Press Releases
    Research
    Quarterly Reports Insider Filings Other Filings

    Price and Volume

    Detailed Quote
    Volume 5,612,312
    Open 0.8900
    Bid (Size) 0.8600 (200)
    Ask (Size) 0.8700 (900)
    Prev. Close 0.9095
    Today's Range 0.8420 - 0.9000
    52wk Range 0.8870 - 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) Q4 2025 Earnings Call Transcript ↗
    Quantum-Si (QSI) Q4 2025 Earnings Call Transcript 
    Via The Motley Fool
    Topics Earnings
    Quantum-Si (NASDAQ:QSI) Reports Q4 2025 Revenue Miss, Guides for Strategic Transition Year ↗
    Via Chartmill

    Performance

    YTD
    -25.7%
    -25.7%
    1 Month
    -20.9%
    -20.9%
    3 Month
    -41.4%
    -41.4%
    6 Month
    -19.5%
    -19.5%
    1 Year
    -38.4%
    -38.4%

    More News

    Read More
    News headline image
    Quantum-Si Reports Fourth Quarter and Full Year 2025 Financial Results
    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
    Earnings Scheduled For November 5, 2025 ↗
    Via Benzinga
    News headline image
    Quantum-Si to Report Fourth Quarter and Full Year 2025 Financial Results on March 3, 2026
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Announces the Release of Two New Manuscripts Demonstrating the Value of Single-Molecule Protein Sequencing in Clinical Proteomics and Pathogen & Toxin Detection
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Announces Launch of New Version 3 Library Preparation Kit and a Suite of Data Analysis Tool Enhancements
    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 Highlights Significant Development Advancements for Proteus™ and Industry Leading Technology Pipeline at Investor & Analyst Day
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si to Highlight Significant Proteus™ Platform Development Progress and Provide Insights into the Company’s Industry Leading Technology Pipeline at Investor & Analyst Day
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si Reports Third Quarter 2025 Financial Results
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si to Participate in the Canaccord Genuity MedTech, Diagnostics and Digital Health & Services Forum
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    12 Health Care Stocks Moving In Monday's Intraday Session ↗
    Via Benzinga
    News headline image
    Quantum-Si to Report Third Quarter 2025 Financial Results on November 5, 2025
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Why Quantum-Si Stock Flopped on Friday ↗
    Via The Motley Fool
    News headline image
    Inventiva, MoonLake Immunotherapeutics And Other Big Stocks Moving Lower In Monday's Pre-Market Session ↗
    Via Benzinga
    Topics Stocks
    News headline image
    Why Merus Shares Are Trading Higher By 38%; Here Are 20 Stocks Moving Premarket ↗
    Via Benzinga
    News headline image
    Quantum-Si to Host Investor & Analyst Event in New York City on November 19, 2025
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Russell 2000 Hits All-Time Highs: 8 Stocks Power Small-Cap Comeback ↗
    Via Benzinga
    Topics ETFs Economy
    News headline image
    12 Health Care Stocks Moving In Thursday's Intraday Session ↗
    Via Benzinga
    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 the Launch of V4 Sequencing Kit, Expanding Proteome Coverage and Unlocking New Applications for Protein Sequencing
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si to Participate in the H.C. Wainwright 27th Annual Global Investment Conference
    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

    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 0.8618
    When was Quantum-Si Incorporated - Class A Common Stock last traded?
    The last trade of Quantum-Si Incorporated - Class A Common Stock was at 03/06/26 04:15 PM ET
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