| HOLIDAY2TEE Limited | Administrative & support | 2026 |
| Holistic Body Online Ltd | Arts & recreation | 2022 |
| Hollands & Hollands Holdings Limited | Financial services | 2016 |
| Hollistic Care Ltd | Health & social care | 2019 |
| Holmes Property Capital Ltd | Real estate | 2026 |
| Holos Care Developments (Kent) Limited | Construction | 2016 |
| Home & Hearth Investments Limited | Real estate | 2020 |
| Home Grown Fruits Limited | Wholesale & retail | 1994 |
| Home Meadow Limited | Financial services | 2019 |
| Home Visiting Physios Ltd | Health & social care | 2022 |
| Homes of Golf Limited | Information & communication | 2019 |
| Homestay Limited | Education | 1999 |
| Homestyle Renovation Limited | Construction | 2025 |
| Hometech Property Solutions Ltd | Construction | 2025 |
| Homeway Mortgages Ltd | Financial services | 2025 |
| Homo Silvaticus Limited | Agriculture & fishing | 2024 |
| Honey Brunch Limited | Hospitality | 2018 |
| Honey HQ Academy Ltd | Education | 2024 |
| Honeybridge Limited | Agriculture & fishing | 2011 |
| Hoolley Ltd | Manufacturing | 2021 |
| Hope Villas Limited | Households | 2002 |
| Hoppers Holidays Ltd | Administrative & support | 2024 |
| Hoppers Independent Trading Ltd | Wholesale & retail | 2024 |
| Horizon Environmental Ltd | Water & waste | 2011 |
| Horizon Holdings Kent Ltd | Financial services | 2023 |
| Horizon Outlet Ltd | Wholesale & retail | 2024 |
| Horizons Advisory Limited | Professional & scientific | 2019 |
| Horkan Consulting Services Ltd | Professional & scientific | 2024 |
| Horton Hills LLP | | 2018 |
| Hortus Management Ltd | Professional & scientific | 2016 |
| Horus Lighting Ltd | Construction | 2018 |
| Hosman Electrical Services Limited | Construction | 2005 |
| Hotel Vacancies International Limited | Administrative & support | 1963 |
| Houghbury Properties Ltd | Real estate | 2020 |
| House and Home Workshops Ltd | Construction | 2015 |
| House LT Ltd | Construction | 2014 |
| House of Farid Ltd | Real estate | 2025 |
| House of Secrets Limited | Wholesale & retail | 2021 |
| Howf Ltd | Professional & scientific | 2014 |
| Howitt Investment Properties Ltd | Real estate | 2017 |
| Howley Consulting Limited | Professional & scientific | 2025 |
| Hoya Catering Ltd | Wholesale & retail | 2025 |
| HP Global Trade Ltd | Wholesale & retail | 2026 |
| HR Revolution Limited | Administrative & support | 2010 |
| Hraf Advanced Research Centres | Professional & scientific | 2014 |
| HRR Solutions Limited | Professional & scientific | 2000 |
| HS Innovbizz Ltd | Wholesale & retail | 2025 |
| HUA Properties Ltd | Real estate | 2018 |
| Hudsuk Limited | Wholesale & retail | 2024 |
| Hugo Hotels Limited | Hospitality | 2018 |
| Hugo's FUN Dog Field Limited | Arts & recreation | 2019 |
| Hullabaloo Creative Market C.I.C. | Arts & recreation | 2024 |
| Human Habitat Limited | Construction | 2019 |
| Human Risk Limited | Professional & scientific | 2019 |
| Humphreys Garden Ltd | Wholesale & retail | 2014 |
| Hundo Foundation Ltd | Administrative & support | 2016 |
| Hundreds Farm Investments Limited | Real estate | 2005 |
| Hunt Horse Trailers Limited | Extraterritorial | 2015 |
| Hunter Avenue (Ashford) Management Company Limited | Households | 2010 |
| Hunters SPV Group Ltd | Real estate | 2026 |
| Huracan Ltd | Information & communication | 2020 |
| Huskie Homes Limited | Construction | 2004 |
| Huwess Limited | Information & communication | 2014 |
| Hven Holdco Ltd | Financial services | 2023 |
| HW Publishing Limited | Information & communication | 2012 |
| Hydropeptide Limited | Wholesale & retail | 2022 |
| Hygeia Solutions Limited | Administrative & support | 2020 |
| Hyperpol Ltd | Information & communication | 2025 |
| Hyperscaleceo Limited | Administrative & support | 2022 |
| Hypersystems Holdings Limited | Financial services | 2025 |
| Hypnos Holdings Limited | Financial services | 2026 |
| Hyssop Project Limited | Construction | 2008 |
| Hythe Garden Landscapes Ltd | Administrative & support | 2014 |
| Hythe Tree Care Ltd | Administrative & support | 2021 |
| Héloïse Press Ltd | Information & communication | 2021 |
| I & D Turner Investments Ltd | Real estate | 2024 |
| I & G GAS Holdings Ltd | Professional & scientific | 2019 |
| I & G Management Group Ltd | Construction | 2021 |
| I I Capital Ltd | Hospitality | 2025 |
| I Will Video Limited | Information & communication | 2017 |
| I&Apartnership Ltd | Wholesale & retail | 2026 |
| Ianvs Consulting Ltd | Administrative & support | 2024 |
| Iarc Limited | Extraterritorial | 2009 |
| Iator Services Limited | Health & social care | 2018 |
| IAV (UK) Limited | Administrative & support | 2020 |
| Ibaim Technical Services Ltd | Administrative & support | 2026 |
| Ibogrup Ltd | Transport & logistics | 2019 |
| IC Investors LLP | | 2019 |
| IC Investors Member Ltd | Professional & scientific | 2019 |
| IC Oxbridge Ltd | Education | 2022 |
| IC Property Development Ltd | Real estate | 2023 |
| ICB Garden Maintenance Ltd | Agriculture & fishing | 2019 |
| Icbig Ltd | Information & communication | 2020 |
| Icbusiness Ltd | Extraterritorial | 2025 |
| Icbusiness Solutions Ltd | Extraterritorial | 2015 |
| ICOLL8 Limited | Professional & scientific | 1997 |
| Iconic Jewellery Store Limited | Wholesale & retail | 2020 |
| Iconicui Ltd | Professional & scientific | 2025 |
| Icrack Phones Centre Ltd | Wholesale & retail | 2023 |
| Icrash Mobiles Ltd | Wholesale & retail | 2022 |