| Horoz Ltd | Hospitality | 2020 |
| Horsham Specsavers Hearcare Limited | Wholesale & retail | 2005 |
| Horsham Specsavers Limited | Wholesale & retail | 1993 |
| Horsham Visionplus Limited | Wholesale & retail | 1993 |
| Hospitality Coach Ltd | Hospitality | 2025 |
| Hosted Business Limited | Information & communication | 2017 |
| Hosted Network Services Limited | Information & communication | 2010 |
| Hosted Services Limited | Professional & scientific | 2003 |
| Hot African Productions Limited | Arts & recreation | 2022 |
| Hotelna Ltd | Professional & scientific | 2025 |
| Hound Manor (Netley) Management Limited | Households | 1995 |
| Hounds Maintenance Solutions Ltd | Wholesale & retail | 2026 |
| Hounslow Specsavers Hearcare Limited | Wholesale & retail | 2017 |
| House Martin Heating Limited | Construction | 2007 |
| House of Cards Event Management Limited | Administrative & support | 2026 |
| House of G Limited | Other services | 2026 |
| House of Henna Ltd | Arts & recreation | 2020 |
| House of Riley Ltd | Financial services | 2025 |
| Houses DD Ltd | Real estate | 2024 |
| Houses for Homes Limited | Real estate | 2002 |
| Hove Specsavers Limited | Wholesale & retail | 1995 |
| Hove Visionplus Limited | Wholesale & retail | 1995 |
| HOW2GROOM Ltd | Education | 2025 |
| Howard Health Hampshire Limited | Health & social care | 2017 |
| Howard Wealth Management Limited | Financial services | 2003 |
| Howarth Management Ltd | Households | 2023 |
| Howarth Street Solutions Ltd | Other services | 2023 |
| Howe Cafe Ltd | Hospitality | 2026 |
| Howes Precision Access Solutions Limited | Manufacturing | 2024 |
| Howes Precision Hydraulics Limited | Manufacturing | 1995 |
| Hoxton Lane Market Ltd | Real estate | 2026 |
| HP Flooring Ltd | Construction | 2024 |
| HPG Bidco Limited | Financial services | 2025 |
| HPG Holdco Limited | Financial services | 2025 |
| HPG Midco Limited | Financial services | 2025 |
| Hpref II Conrad UK Investments Limited | Financial services | 2021 |
| Hpref II UK Minority Holdings Limited | Financial services | 2021 |
| HPS Hampshire Ltd | Other services | 2021 |
| Hpsr Ltd | Real estate | 2023 |
| HPW Contracting Ltd | Construction | 2025 |
| HPW Property Legal Services Limited | Professional & scientific | 2020 |
| HR Transformation & Employment Consultancy Ltd | Professional & scientific | 2025 |
| HRP Architects Ltd | Professional & scientific | 2015 |
| HS Windows and Doors Ltd | Construction | 2018 |
| Hsbm Southsea Ltd | Construction | 2023 |
| HSE Cloud Ltd | Professional & scientific | 2025 |
| HSE National Limited | Hospitality | 2019 |
| HSM Property Management Ltd | Real estate | 2026 |
| HSP Tronix Limited | Other services | 2024 |
| HTL Projects Ltd | Construction | 2025 |
| HTP Property Ltd | Real estate | 2020 |
| HTP Property Solutions Ltd | Real estate | 2020 |
| HTS Engineering Ltd | Manufacturing | 2025 |
| Hub Jvco (Elephant) Limited | Financial services | 2024 |
| Hub Jvco Limited | Financial services | 2024 |
| Hub Propco (Elephant) Limited | Real estate | 2024 |
| Hub Propco (Finsgate House) Limited | Real estate | 2024 |
| Huckleberry Developments Ltd | Real estate | 2016 |
| Hucknall Specsavers Limited | Wholesale & retail | 2004 |
| Hucknall Visionplus Limited | Wholesale & retail | 2004 |
| Hudd TV Ltd | Information & communication | 2021 |
| Huddersfield Specsavers Hearcare Limited | Wholesale & retail | 2006 |
| Hugg Music Limited | Arts & recreation | 1972 |
| Hugh Symons Audio Visual Limited | Information & communication | 2014 |
| Hughes & Salvidge Demolition Limited | Financial services | 2018 |
| Hughes and Salvidge (Portsmouth) Limited | Extraterritorial | 1964 |
| Hughes and Salvidge Limited | Water & waste | 2007 |
| Hughes and Salvidge Newco Limited | Professional & scientific | 1977 |
| Hughes Carne Independent Financial Advisers Limited | Financial services | 1995 |
| Hughes Data Forge Ltd | Information & communication | 2024 |
| Hughes Ellard Limited | Real estate | 2000 |
| Hughes House Liverpool GP Limited | Financial services | 2021 |
| Hughes House Liverpool LP | | 2021 |
| Huis Technologies Ltd | Information & communication | 2018 |
| Hull Hampshire Estates PLC | Financial services | 1988 |
| Hull Hampshire Estates Services Limited | Real estate | 1971 |
| Hull Specsavers Hearcare Limited | Wholesale & retail | 2006 |
| Hull Specsavers Limited | Wholesale & retail | 1991 |
| Hull Trading Co Ltd | Wholesale & retail | 2026 |
| Hull Visionplus Limited | Wholesale & retail | 2001 |
| Humly Hampshire Limited | Administrative & support | 2009 |
| Humphreys Baker Ltd | Professional & scientific | 2018 |
| Humphreys Real Estate Ltd | Real estate | 2022 |
| Humphreys Yacht Design Ltd | Administrative & support | 2003 |
| Hunky Dory Play Ltd | Arts & recreation | 2021 |
| Hunstanton Specsavers Limited | Wholesale & retail | 2018 |
| Hunter Collective Limited | Other services | 2017 |
| Hunter Phoenix Training Ltd | Other services | 2022 |
| Hunters Lodge Care Homes Limited | Health & social care | 2009 |
| Hunthouse Marine Limited | Transport & logistics | 2012 |
| Huntingdon Specsavers Hearcare Limited | Wholesale & retail | 2017 |
| Huntingdon Specsavers Limited | Wholesale & retail | 2000 |
| Hunts Pond Road Management Company Limited | Households | 2010 |
| Hurren Ltd | Construction | 2023 |
| Hursley Investments Limited | Other services | 2016 |
| Hurst & Hurst Estates Limited | Construction | 2014 |
| Hutchinson Drainage Limited | Extraterritorial | 2005 |
| Hutchinson Environmental Solutions Limited | Water & waste | 1973 |
| Huyton Specsavers Hearcare Limited | Wholesale & retail | 2026 |
| Huyton Specsavers Limited | Wholesale & retail | 2000 |