| Hard at Work Tuition Limited | Education | 2026 |
| Harley's Draught Limited | Manufacturing | 2020 |
| Harrison Swindon Limited | Hospitality | 2024 |
| Hashtag Bigsmile Community Interest Company | Other services | 2019 |
| Hashtag Creative Media Ltd | Professional & scientific | 2020 |
| Hashtag Travel Group Limited | Administrative & support | 2017 |
| HDS Consultancy Services Ltd | Administrative & support | 2022 |
| Heddon Valley Mill Limited | Real estate | 2024 |
| Heyhill Limited | Real estate | 2016 |
| Heyhill Property Limited | Real estate | 2017 |
| Highwood Partnership LLP | | 2013 |
| Hobart Accrington Limited | Real estate | 2026 |
| Hobart Bradford Limited | Professional & scientific | 2024 |
| Hobart Cannock Limited | Professional & scientific | 2024 |
| Hobart Capital Partners Limited | Administrative & support | 2025 |
| Hobart CP1 Limited | Real estate | 2026 |
| Hobart Investment Management Limited | Administrative & support | 2024 |
| Hobart Partners Limited | Other services | 2012 |
| Hobart RP 1 Holdco Limited | Real estate | 2024 |
| Hobart Ventures Limited | Real estate | 2025 |
| Hogan Property Collective Limited | Real estate | 2026 |
| Holistic Guru Ltd | Other services | 2024 |
| HP3 Property Services Limited | Construction | 2022 |
| Ifms Europe Limited | Professional & scientific | 2013 |
| Ihccg Properties Limited | Real estate | 2022 |
| Integral International Group Ltd | Other services | 2019 |
| ITS Souk Limited | Wholesale & retail | 2023 |
| J D Wallis Limited | Construction | 2011 |
| Jacks Outdoor Wear Ltd | Wholesale & retail | 2007 |
| Jacob Films Limited | Professional & scientific | 2025 |
| Jacobs & Jacobs Interior Finishes Limited | Professional & scientific | 2020 |
| Jacobs Contracting Limited | Construction | 2021 |
| Jadco Building Materials Ltd | Wholesale & retail | 2022 |
| JAG Contracts Limited | Administrative & support | 2024 |
| JAH & Partners Limited | Professional & scientific | 2024 |
| James Edwin & Co | Financial services | 2022 |
| Jamie Franks Property Group Ltd | Real estate | 2024 |
| JBL Grounds Care Limited | Administrative & support | 2023 |
| JBP Partners Limited | Professional & scientific | 2021 |
| JD Wood Flooring Limited | Construction | 2014 |
| Jenn.Ex Limited | Administrative & support | 2023 |
| JM & TM Limited | Professional & scientific | 2017 |
| JO Mulchrone Hypnotherapy Limited | Health & social care | 2024 |
| Journey Holdings Limited | Financial services | 2021 |
| Journey Trading Limited | Professional & scientific | 2026 |
| Joy Airline Ltd | Transport & logistics | 2021 |
| JP Merchandise Limited | Wholesale & retail | 2015 |
| Justine Addison UN- Limited | Administrative & support | 2024 |
| K Park Property LLP | | 2015 |
| Kings Park Fulfillment Ltd | Transport & logistics | 2020 |
| Kings Park Rangers Football Club Limited | Arts & recreation | 2023 |
| KJ Sapper Consulting Limited | Professional & scientific | 2026 |
| KRW & KJW Limited | Real estate | 2022 |
| LA Bumpa Limited | Manufacturing | 1999 |
| Laboratory Air Services Ltd | Construction | 2021 |
| Ladysmith Leisure Limited | Real estate | 2016 |
| Ladytrady Limited | Professional & scientific | 2023 |
| Landvista Ltd | Professional & scientific | 2019 |
| Landvista Properties Limited | Administrative & support | 2025 |
| LAO Ltd | Real estate | 2011 |
| Leed Trading Limited | Financial services | 2015 |
| Lemar Property Investments Ltd | Real estate | 2025 |
| Lemniscate Investments Ltd | Financial services | 2016 |
| Lifetime Adaptations & Design Solutions Ltd | Construction | 2018 |
| Loampit Vale Limited | Real estate | 2017 |
| Lodge Farm Trading Limited | Manufacturing | 2018 |
| London City Taverns Limited | Extraterritorial | 2019 |
| Lucky Mile Productions Limited | Arts & recreation | 2017 |
| Luco Group Limited | Construction | 2015 |
| Lunare Limited | Wholesale & retail | 2025 |
| Luxury Toilet Hire (UK) Limited | Water & waste | 2007 |
| LW Surveys Limited | Professional & scientific | 2022 |
| M & M Motorhomes Limited | Wholesale & retail | 2020 |
| M Brown Professional Services Ltd | Health & social care | 2011 |
| M Leech Services Limited | Construction | 2021 |
| Maloney Law Limited | Professional & scientific | 2024 |
| Marks Hall Farms Limited | Agriculture & fishing | 1959 |
| Matese Holdings Limited | Financial services | 2026 |
| Matthews Trading Limited | Financial services | 2024 |
| Mazers Court Limited | Real estate | 2004 |
| Mbs.Uk Properties Ltd | Construction | 2021 |
| MCM Electrical Solutions Limited | Construction | 2018 |
| MHG Engineering Limited | Professional & scientific | 2005 |
| Mindpin Limited | Financial services | 2020 |
| MJW Power Limited | Professional & scientific | 2013 |
| MK Aero Support Limited | Professional & scientific | 1994 |
| Mobius Jewellery Ltd | Wholesale & retail | 2011 |
| Mond of London Ltd | Wholesale & retail | 2023 |
| Monk & Crook Holdings Limited | Financial services | 1995 |
| Morton Mills Ltd | Wholesale & retail | 2020 |
| Motion Picture Vehicles Limited | Transport & logistics | 2019 |
| Mpar Limited | Real estate | 2026 |
| Mscluk Ltd | Wholesale & retail | 2019 |
| MSG Contracts Limited | Administrative & support | 1999 |
| MTS Calibration Limited | Professional & scientific | 2008 |
| Multitech Site Holdings Limited | Financial services | 2014 |
| Mutlows Property Limited | Real estate | 2020 |
| Mybrewpub Limited | Manufacturing | 2015 |
| Nash Dance Academy Limited | Education | 2017 |
| Natura Carbon Limited | Other services | 2021 |