| GW Property Maintenance Ltd | Construction | 2024 |
| GW Restoration Ltd | Construction | 2018 |
| H Q Cabling Services Limited | Information & communication | 2019 |
| H S Medical Ltd | Health & social care | 2019 |
| H&F & Kent Commercial Services LLP | | 2026 |
| H&G Engineers Limited | Professional & scientific | 2015 |
| H&J 1 Limited | Professional & scientific | 2026 |
| H.G. Brunner Limited | Wholesale & retail | 1977 |
| H.Newbury & Son(Builders)Limited | Professional & scientific | 1946 |
| Hadlow Dental Practice Ltd | Health & social care | 2018 |
| Haggai Project Services Ltd | Professional & scientific | 2015 |
| Hakuhana Academy Limited | Manufacturing | 2020 |
| Hakuhana Business Lifeboat Limited | Administrative & support | 2020 |
| Hakuhana Cargo and Shipping Limited | Wholesale & retail | 2020 |
| Hakuhana Consultants Limited | Extraterritorial | 2022 |
| Hakuhana Contact Centre Limited | Extraterritorial | 2021 |
| Hakuhana Contract Temps Limited | Administrative & support | 2021 |
| Hakuhana Digital Services Limited | Information & communication | 2020 |
| Hakuhana Domestic Services Limited | Extraterritorial | 2019 |
| Hakuhana Employer of Record Limited | Administrative & support | 2020 |
| Hakuhana Enterprise Limited | Extraterritorial | 2023 |
| Hakuhana Estate Services Limited | Real estate | 2020 |
| Hakuhana Limited | Administrative & support | 2020 |
| Hakuhana Linen Service Limited | Wholesale & retail | 2022 |
| Hakuhana Manufacturing Limited | Other services | 2020 |
| Hakuhana Media Services Limited | Extraterritorial | 2021 |
| Hakuhana Mercantile Ltd | Extraterritorial | 2021 |
| Hakuhana Networking Ltd | Extraterritorial | 2022 |
| Hakuhana PAY & Salary Benchmarking Limited | Wholesale & retail | 2021 |
| Hakuhana Production Limited | Manufacturing | 2022 |
| Hakuhana Project Management Services Limited | Administrative & support | 2021 |
| Hakuhana Properties Limited | Extraterritorial | 2022 |
| Hakuhana Research and Development Limited | Professional & scientific | 2022 |
| Hakuhana Retail Limited | Extraterritorial | 2021 |
| Hakuhana Risk Management Limited | Professional & scientific | 2022 |
| Hakuhana Security Services Limited | Extraterritorial | 2022 |
| Hakuhana Service Wash Collection Limited | Households | 2020 |
| Hakuhana Technology Limited | Extraterritorial | 2022 |
| Hakuhana Transportation Services Limited | Extraterritorial | 2021 |
| Hakuhana Travel Ltd | Extraterritorial | 2023 |
| Hakuhana Work Records Limited | Information & communication | 2022 |
| Hales Marshall Design Architects Limited | Construction | 2009 |
| Hall Road Elsenham Estate Management Company Limited | Households | 2023 |
| Halloper Limited | Real estate | 1972 |
| Hammond Brickwork Ltd | Construction | 2012 |
| Hampshire & Kent Commercial Services LLP | | 2018 |
| Hannon Harmony Limited | Other services | 2021 |
| Happy Feet Management Limited | Information & communication | 2010 |
| Hardys Wine Store Limited | Wholesale & retail | 2023 |
| Harmony Consultants UK Ltd | Administrative & support | 2025 |
| Harmony Variety Clubs Limited | Arts & recreation | 2006 |
| Harrison Asset Management Limited | Households | 2025 |
| Harrison Jack Investments Ltd | Real estate | 2020 |
| Harrison James Construction Ltd | Extraterritorial | 2024 |
| Hart & Co Holdings Limited | Financial services | 2023 |
| Hartco Consultancy Ltd | Professional & scientific | 2024 |
| Hartshead View Management Company Limited | Households | 2024 |
| Haven Farm Residential Management Company Limited | Households | 2024 |
| Hawk Control Solutions Limited | Information & communication | 2015 |
| Hawksmoor Wren Limited | Real estate | 2006 |
| Hazard X 24/7 Ltd | Administrative & support | 2026 |
| HC MEP Ltd | Professional & scientific | 2025 |
| Headcorn Optical Ltd | Wholesale & retail | 2016 |
| Heartlink Limited | Professional & scientific | 2020 |
| Heat on London Limited | Construction | 2022 |
| Heath Farm Lane LLP | | 2016 |
| Heathlands Court Management Limited | Households | 1987 |
| Heavenly Floral Design Limited | Wholesale & retail | 2026 |
| Hedge Fund Consulting Ltd | Information & communication | 1998 |
| Henderstone Holdings Ltd | Real estate | 2023 |
| Heritage Cleaning Group Ltd | Administrative & support | 2025 |
| Hermitage Granary Limited | Households | 2003 |
| Hermod Retail Limited | Information & communication | 2024 |
| Hevicon Limited | Information & communication | 2011 |
| Hexacath Limited | Wholesale & retail | 2005 |
| Hhjmb Limited | Information & communication | 2026 |
| Highbank House Ltd | Professional & scientific | 2008 |
| Highland Views Limited | Real estate | 2023 |
| Hill Place Farm Developments Limited | Administrative & support | 2002 |
| Hillesden Securities Limited | Administrative & support | 1979 |
| Hillston Ltd | Manufacturing | 2021 |
| Hippo Estates Ltd | Real estate | 2026 |
| Hitzinger UK Limited | Administrative & support | 2000 |
| Hive Bespoke Carpentry Ltd | Manufacturing | 2024 |
| Hive Home Properties Limited | Construction | 2024 |
| Hjmb Limited | Education | 2020 |
| HMS Independent Limited | Wholesale & retail | 2022 |
| Hoem Ltd | Construction | 2021 |
| Hogwood Park Estate Management Company Limited | Households | 2022 |
| Holistic Health Community CIC | Health & social care | 2025 |
| Holloway Bros Mechanical Services Ltd | Construction | 2026 |
| Home Interiors Writer Limited | Arts & recreation | 2021 |
| Homeglow Limited | Construction | 2014 |
| Homeland Building Services Limited | Construction | 2009 |
| Homelands (Bishops Cleeve) Management Company Limited | Households | 2013 |
| Homelee Investments Ltd | Real estate | 2019 |
| Honee Boutique Limited | Wholesale & retail | 2021 |
| Hopfields JV LLP | | 2025 |
| Horseshoe Court (Manchester Road) Management Limited | Households | 1985 |
| Horsmonden Brenchley Road Management Company Limited | Households | 2026 |