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    24Haymarket

    London, United KingdomFounded 2012
    24haymarket.comLinkedIn
    Climate & EnergyHealthcareCybersecurityEnterprise Software

    24Haymarket is a London-based venture capital and growth equity firm that leverages a network of over 100 experienced private investors to back high-growth UK companies with initial commercial traction. Founded in 2012, it typically invests £1-5m per company across sectors including climate tech, digital healthcare, and cyber security.

    Average disclosed round size is $14.4M (across 15 rounds with reported amounts).

    Find people at 24Haymarket on Goldilocks AI

    Portfolio

    26

    Fund Size

    —

    Top Stage

    Unknown

    Last 12 Mo

    0

    Team

    Jamie Dunnett

    Jamie Dunnett

    Partner

    Tom Haywood

    Tom Haywood

    Partner

    BL

    Bruno Lucas

    Investment Analyst

    Lindsay Stuart

    Lindsay Stuart

    Board Member

    Lucie Mazankova

    Lucie Mazankova

    Head of Operations and Compliance

    Marek Gumienny

    Marek Gumienny

    Board Member

    Paul Tselentis

    Paul Tselentis

    CEO and Board Member

    Simon Leefe

    Simon Leefe

    Board Member

    Portfolio Breakdown

    Stage Distribution

    Sector Distribution

    Investment Activity

    DealsAvg Round Size

    Portfolio

    34 investments
    CompanyRoundAmountDate
    Osprey Flight Solutions logoOsprey Flight SolutionsUnknown—Sep 2025
    DrDoctor logoDrDoctorUnknown—Jan 2023
    HHypetexUnknown—Jul 2022
    Circulor logoCirculorSeries B$25MJun 2022
    Spoke logoSpokeSeries B—Jun 2022
    Monterosa logoMonterosaUnknown—Mar 2022
    Respoke Limited logoRespoke LimitedUnknown—Mar 2022
    Smartia logoSmartiaUnknown—Jan 2022
    Cyber Owl logoCyber OwlUnknown$5.1MJan 2022
    Monterosa logoMonterosaGrowth$3.5MJan 2022
    Aegiq logoAegiqSeed—Jan 2022
    MMediSieveUnknown—Jun 2021
    MMogrifyUnknown$33MMay 2021
    ProSapient logoProSapientSeries A$10MJan 2021
    MMogrifySeries A$33MJan 2021
    MmyGworkSeries A—Jan 2021
    MmyGworkPre-Seed—Dec 2020
    DefiniGEN logoDefiniGENGrowth$3.3MJan 2020
    Sphere Fluidics logoSphere FluidicsUnknown$7MJun 2019
    MMogrifySeries A$16MJan 2019
    MMogrifySeed$3.7MJan 2019
    Privitar logoPrivitarSeries B$40MJan 2019
    TTickXSeries A—Mar 2018
    Interface Polymers logoInterface PolymersUnknown$2MSep 2017
    Privitar logoPrivitarSeries A$16MJan 2017
    Page 1 of 2

    Top Co-Investors

    BGF4 shared
    Parkwalk Advisors4 shared
    Salesforce Ventures4 shared
    Ahren Innovation Capital3 shared
    IQ Capital3 shared
    Warburg Pincus LLC3 shared
    Guinness Ventures2 shared
    Oxford Capital2 shared
    Seedrs2 shared
    Forward Partners2 shared
    Astellas Venture Management2 shared
    ACF Investors2 shared
    Cambridge Angels2 shared
    Salesforce2 shared
    Illuminate Financial2 shared
    Triple Point Ventures1 shared
    Interplay Ventures1 shared
    Techstars1 shared
    YFM Equity Partners1 shared
    Ananda Impact Ventures1 shared

    Last updated: 20 October 2026