| Hoxley Limited | Information & communication | 2026 |
| HP Private Limited | Wholesale & retail | 2026 |
| Hpbx Limited | Wholesale & retail | 2025 |
| HPD Risk Management Limited | Professional & scientific | 2025 |
| HR & J Cracknell Limited | Wholesale & retail | 2018 |
| HR Business Solutions Ltd | Administrative & support | 2020 |
| Hristi Limited | Professional & scientific | 2022 |
| Hristo Ltd | Other services | 2020 |
| HRP 2 Ltd | Real estate | 2020 |
| HS Rajwansi Ltd | Wholesale & retail | 2025 |
| Hsengiv Ltd | Real estate | 2019 |
| HSH Smart Garage Limited | Wholesale & retail | 2018 |
| Hspm Ltd | Wholesale & retail | 2024 |
| HSR Consultancy Ltd | Administrative & support | 2021 |
| HT Dining Limited | Hospitality | 2019 |
| HTC Electrical Solutions Ltd | Construction | 2025 |
| HTL Property Management Ltd | Real estate | 2022 |
| Hubbard Property Services Limited | Construction | 2018 |
| Hubexo South UK Limited | Information & communication | 2012 |
| Huckle Legal Accounts Limited | Administrative & support | 2012 |
| Hudson George Real Estate Limited | Real estate | 2023 |
| Hudson House RTM Company Limited | Households | 2024 |
| Hughes International Holdings Limited | Financial services | 2016 |
| Hughes International Limited | Wholesale & retail | 1985 |
| Hughes International Motors Limited | Wholesale & retail | 2002 |
| Hughes Motor Company Holdings Limited | Financial services | 2024 |
| Hughes Motor Company Limited | Wholesale & retail | 2024 |
| Hughes Power Estates Limited | Other services | 2023 |
| Hughes Surveyors (Southern) Ltd | Professional & scientific | 2012 |
| Hughes Workshop Limited | Wholesale & retail | 2002 |
| Hulakawawa Limited | Manufacturing | 2026 |
| HUM & Purry Limited | Wholesale & retail | 2008 |
| Human Potential Ltd | Professional & scientific | 2005 |
| Humble Care Services Ltd | Hospitality | 2023 |
| Hungarian Cumans CIC | Other services | 2018 |
| Hungry Frog Ltd | Manufacturing | 2023 |
| Hungry HK Ltd | Hospitality | 2022 |
| Hungry Tiger Dorset Limited | Hospitality | 2025 |
| Hunter Goldman Limited | Administrative & support | 2017 |
| Hunter International Properties Ltd | Real estate | 2017 |
| Hunter Services (UK) Limited | Other services | 2001 |
| Hunters (Midlands) Limited | Real estate | 1991 |
| Hunters Financial Services Limited | Professional & scientific | 1991 |
| Hunters Franchising Limited | Professional & scientific | 2005 |
| Hunters Home Care Ltd | Health & social care | 2023 |
| Hunters Property Group Limited | Real estate | 2000 |
| Hunters Property Limited | Real estate | 2015 |
| Hunters Survey & Valuation Limited | Professional & scientific | 1991 |
| Hurley Property Holdings Ltd | Real estate | 2025 |
| Hurley Property Ltd | Real estate | 2021 |
| Hurley Property Services Ltd | Real estate | 2024 |
| Hurley Pullan Investments Ltd | Real estate | 2020 |
| Hurleys Solicitors Limited | Professional & scientific | 2014 |
| Hurlingham Lodge Management Company Limited | Households | 1986 |
| Hurn Court Developments Limited | Real estate | 1984 |
| Hursley Estates Ltd | Financial services | 2025 |
| Hurst Court RTM Company Limited | Households | 2019 |
| Hurst Park UK Limited | Professional & scientific | 2008 |
| Husar+ Ltd | Construction | 2021 |
| Husen Developments Bournemouth Limited | Construction | 2025 |
| Hush Agency Ltd | Professional & scientific | 2022 |
| Hushyar Ltd | Wholesale & retail | 2026 |
| Husk Creative Ltd | Professional & scientific | 2022 |
| Hustech Ltd | Wholesale & retail | 2025 |
| Hutchinson & Healey Limited | Real estate | 2010 |
| Hutchinson Yacht Consulting Limited | Professional & scientific | 2013 |
| HVS Building Engineering Services Limited | Wholesale & retail | 1946 |
| HVW Paraiso Limited | Extraterritorial | 2013 |
| Hwep Ltd | Financial services | 2014 |
| HWL Contracts Limited | Construction | 2011 |
| Hybrid Developments Ltd | Construction | 2018 |
| Hybrid the Flower Company Limited | Wholesale & retail | 2004 |
| HYC International Limited | Professional & scientific | 2016 |
| HYD Holdings Ltd | Other services | 2021 |
| Hydraheat Limited | Construction | 2022 |
| Hydropool by HI Tech Limited | Wholesale & retail | 2024 |
| Hydropure Ltd | Administrative & support | 2019 |
| Hyperbrand Limited | Information & communication | 2012 |
| Hyperenergetic Ltd | Wholesale & retail | 2023 |
| Hyperhub Ltd | Administrative & support | 2014 |
| Hyson Exchange Ltd | Hospitality | 2025 |
| Hyun Properties Ltd | Administrative & support | 2019 |
| Häus of Dons Limited | Administrative & support | 2022 |
| Hi̇no Ltd | Hospitality | 2026 |
| I G Poulson Ltd | Information & communication | 2007 |
| I Paint 2 Limited | Construction | 2022 |
| I Read, YOU Learn UN- Limited | Information & communication | 2021 |
| I&C Property Limited | Households | 2023 |
| I&R Portfolio Ltd | Real estate | 2023 |
| I-Performance Limited | Professional & scientific | 2007 |
| I.B Woodworks Ltd | Construction | 2026 |
| I.T. Anonymous Ltd | Information & communication | 2007 |
| I2R Medical Limited | Administrative & support | 2009 |
| I2R Medtech Limited | Administrative & support | 2024 |
| I2S2 Technology Consultants Limited | Professional & scientific | 2012 |
| Iaam Limited | Other services | 2008 |
| IAN Campbell Ltd | Information & communication | 2018 |
| IAN Unsworth Productions Limited | Information & communication | 2007 |
| IBN Building and Landscaping Ltd | Construction | 2026 |
| Iboo Construction Ltd | Construction | 2021 |