| Harmim | Financial services | 2022 |
| Harpwood House Limited | Health & social care | 2015 |
| Harrison Data Networks Limited | Information & communication | 2025 |
| Harrison Real Estate Limited | Real estate | 2014 |
| Harriwills Hire Ltd | Administrative & support | 2020 |
| Harry Birrell Scholarship Trust Limited | Education | 1997 |
| Hartfield Scaffolding Ltd | Construction | 2014 |
| Hartland Marketing Limited | Public administration | 2023 |
| Hartwell Classic Cars Limited | Wholesale & retail | 1999 |
| Harvey Boyd Trading Limited | Wholesale & retail | 2013 |
| Harvey's Plumbing & Heating (Domestic) Ltd | Construction | 2015 |
| Harveys Services Limited | Construction | 1999 |
| Hatch Broadcast Limited | Information & communication | 2016 |
| Haus & Home Property Limited | Real estate | 2025 |
| Haven Consultants Ltd | Professional & scientific | 2019 |
| Havensilver Estates Limited | Real estate | 1981 |
| Havensilver Investments (Seal) Limited | Real estate | 2020 |
| Havensilver Investments (Sevenoaks) Limited | Real estate | 2014 |
| Havensilver Investments Limited | Real estate | 1980 |
| Havills Consultancy Limited | Professional & scientific | 2014 |
| Hawk Solutions Limited | Transport & logistics | 2002 |
| Hawkins Windows & Glazing Ltd | Construction | 2026 |
| Hawkwell Construction and Warranty Ltd | Professional & scientific | 2013 |
| Hawthorn Business Limited | Education | 2016 |
| Haywards Catering Services Ltd | Wholesale & retail | 2017 |
| Haywards Farmshop Ltd | Wholesale & retail | 2016 |
| Hazel General Builders Ltd | Construction | 2017 |
| Hazelbrook Homes Limited | Construction | 2007 |
| Hazlett Wood Farm Ltd | Agriculture & fishing | 2024 |
| HCL Consultancy and Recruitment Ltd | Professional & scientific | 2012 |
| Hdhs Walled Garden Limited | Arts & recreation | 2016 |
| Head First Consultancy Ltd | Health & social care | 2023 |
| Head High (Kent) Limited | Other services | 2014 |
| Head of the Hounds Ltd | Other services | 2018 |
| Headfort London Ltd | Professional & scientific | 2025 |
| Headland Weald Freehold Limited | Construction | 1994 |
| Headland Weald Limited | Construction | 1989 |
| Headland Weald Sienna Limited | Construction | 1996 |
| Headlands (Thorpeness) Limited | Real estate | 1995 |
| Headlands NO 2 (Thorpeness) Ltd. | Real estate | 2010 |
| Headline Developments Limited | Real estate | 1987 |
| Health Admin Services Ltd | Administrative & support | 2025 |
| Health Source International Limited | Extraterritorial | 1999 |
| Healthcare Investment Group Limited | Financial services | 2021 |
| Healthy YOU Healthy Communities Limited | Education | 2015 |
| Heartimaging Digital Ltd | Information & communication | 2026 |
| Heartwood Holmes Ltd | Real estate | 2021 |
| Heaver Trading Co Limited | Real estate | 1998 |
| Heavy Music Artwork Limited | Arts & recreation | 2017 |
| HEI (Sevenoaks) Ltd | Hospitality | 2022 |
| Heidi and BEA Limited | Extraterritorial | 2020 |
| Heis Fish Bar Ltd | Hospitality | 2026 |
| Helen Breeze Property Management LLP | | 2012 |
| Helioglyph Partners Ltd | Professional & scientific | 2017 |
| Hello Person Ltd | Professional & scientific | 2020 |
| Help! VA Limited | Administrative & support | 2016 |
| Helvetica Tutors Limited | Education | 2024 |
| Hemlow Holdings Limited | Professional & scientific | 2002 |
| Hemlow Limited | Real estate | 1996 |
| Hemlow Projects Ltd | Construction | 2019 |
| Hemsley Conservation Centre Ltd. | Agriculture & fishing | 2015 |
| Henden Manor Estates Limited | Agriculture & fishing | 1997 |
| Hendon Hall Hotel Limited | Professional & scientific | 2007 |
| Hendrik Brickwork Limited | Construction | 1997 |
| Henriksson Storage East Midlands Limited | Transport & logistics | 2024 |
| Henriksson Storage North West Limited | Transport & logistics | 2024 |
| Henriksson Storage South East Limited | Transport & logistics | 2025 |
| Henriksson Storage South West Limited | Transport & logistics | 2026 |
| Henriksson Storage UK Ltd | Transport & logistics | 2024 |
| Henry Desmond Production Limited | Manufacturing | 2018 |
| Henry Rollin House Management Company Limited | Households | 2020 |
| Henward Property Ltd | Real estate | 2025 |
| Hepburn and Hughes Ltd | Manufacturing | 2018 |
| HER Hair My Head Ltd | Other services | 2021 |
| Herbert Court Management Company Limited | Households | 2000 |
| Herbmarr Consulting Limited | Professional & scientific | 2026 |
| Heritage Brickwork Contracts Ltd | Construction | 2025 |
| Hermes Media Ltd | Professional & scientific | 2023 |
| Heron Wood Management Company Ltd | Households | 2020 |
| Herself Supplements Ltd | Wholesale & retail | 2024 |
| HES Holdings Limited | Financial services | 2023 |
| Hettie Hunter Psychotherapy Limited | Health & social care | 2024 |
| Hever Estates Ltd | Extraterritorial | 2022 |
| Hexagon Consulting Services Ltd | Professional & scientific | 2023 |
| HG15 Ltd | Information & communication | 2016 |
| Hhsrs Compliance Solutions Ltd | Construction | 2025 |
| Hicksfield Ltd | Real estate | 2025 |
| Hide in the Downs LLP | | 2026 |
| High Class Scaffolding Limited | Construction | 2014 |
| High Growth Ventures Limited | Professional & scientific | 2026 |
| High Impact Graphics Limited | Professional & scientific | 2026 |
| High Tracks Adventure Learning Limited | Education | 2010 |
| Highbar Fitness Limited | Arts & recreation | 2019 |
| Higher Frequency Lift Solutions Ltd | Construction | 2025 |
| Highland Interiors Limited | Professional & scientific | 2016 |
| Highlands Care Solutions Ltd | Health & social care | 2019 |
| Highway Plumbing & Drainage Limited | Construction | 2010 |
| Highways Training & Consultancy Services Ltd | Professional & scientific | 2021 |
| Higl Property Ltd | Extraterritorial | 2025 |
| Hila Property Solutions Ltd | Construction | 2025 |