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

    0.9541 -0.0759 (-7.37%)
    Streaming Delayed Price Updated: 2:17 PM EST, Feb 5, 2026 Add to My Watchlist
    Quote
    Overview Detailed Quote Charting Historical Prices
    News
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    Quarterly Reports Insider Filings Other Filings

    Price and Volume

    Detailed Quote
    Volume 6,015,929
    Open 1.030
    Bid (Size) 0.9540 (1,300)
    Ask (Size) 0.9541 (300)
    Prev. Close 1.030
    Today's Range 0.9400 - 1.040
    52wk Range 0.9499 - 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 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

    Performance

    YTD
    -17.7%
    -17.7%
    1 Month
    -24.3%
    -24.3%
    3 Month
    -47.0%
    -47.0%
    6 Month
    -30.4%
    -30.4%
    1 Year
    -50.6%
    -50.6%

    More News

    Read More
    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
    Earnings Scheduled For August 5, 2025 ↗
    Via Benzinga
    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
    News headline image
    Quantum-Si to Participate in the UBS Precision Medicine Frontiers Summit
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si (QSI) Q2 Revenue Falls 47% ↗
    Via The Motley Fool
    News headline image
    Quantum-Si Reports Second Quarter 2025 Financial Results
    From Quantum-Si Incorporated
    Via Business Wire
    News headline image
    Quantum-Si to Participate in the Canaccord Genuity 45th Annual Growth Conference
    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 0.9541
    When was Quantum-Si Incorporated - Class A Common Stock last traded?
    The last trade of Quantum-Si Incorporated - Class A Common Stock was at 02/05/26 02:17 PM ET
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