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    Open Field Capital

    New York, New York, United StatesFounded 2003

    Open Field Capital is a New York-based SEC-registered investment adviser established in 2003, focused on managing emerging technology portfolios across public equity and venture investments. The firm targets high-growth disruptive technology companies through a flexible, crossover mandate.

    43% of their portfolio is in Consumer. Their most common stage is series-b (43% of deals). Average disclosed round size is $127.5M (across 4 rounds with reported amounts).

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    Portfolio

    5

    Fund Size

    —

    Top Stage

    Series B

    Last 12 Mo

    0

    Team

    James Stableford

    James Stableford

    Principal Director of Portfolios Chief Compliance Officer

    Marc Weiss

    Marc Weiss

    Principal Chief Investment Officer

    Michael Sandifer

    Michael Sandifer

    Principal

    AZ

    Aaron Zeng

    Equity Research Analyst

    Portfolio Breakdown

    Stage Distribution

    Sector Distribution

    Investment Activity

    DealsAvg Round Size

    Portfolio

    7 investments
    CompanyRoundAmountDate
    Eridu AI logoEridu AIUnknown$200MJan 2026
    Paragraf logoParagrafSeries C$55MAug 2025
    Delfi Diagnostics, Inc. logoDelfi Diagnostics, Inc.Series B—Jul 2022
    Delfi logoDelfiSeries B—Jul 2022
    Neo Cybernetica logoNeo CyberneticaSeed$30MFeb 2022
    Delfi logoDelfiSeries B$225MJan 2022
    Delfi logoDelfiGrowth——

    Top Co-Investors

    Last updated: 20 October 2026