| Hillrise Property Developers Limited | Real estate | 2021 |
| Hillside Enterprises Ltd | Administrative & support | 2007 |
| Hillsing Developments Ltd | Construction | 2021 |
| Hillvale Transport Limited | Transport & logistics | 2015 |
| Hilton House Productions Ltd | Professional & scientific | 2016 |
| Hinchy Professional Services Ltd | Professional & scientific | 2008 |
| Hind & Associates Limited | Professional & scientific | 2026 |
| Hindhead CPP Investment Limited | Construction | 2023 |
| Hingston Group Limited | Professional & scientific | 2011 |
| Hips (Trustees) Limited | Professional & scientific | 2000 |
| Hishani Kirby Associates Limited | Professional & scientific | 2015 |
| Hixan Ltd | Information & communication | 2017 |
| HJB Consulting Ltd | Professional & scientific | 2010 |
| HK Holdings (NO.1) Limited | Financial services | 1987 |
| HK Holdings (NO.2) Limited | Financial services | 1987 |
| Hkgh Properties Ltd | Real estate | 2022 |
| HKT Services Ltd | Transport & logistics | 2024 |
| HL Communications Ltd | Information & communication | 2018 |
| HLT Asset Ltd | Hospitality | 2025 |
| HMT Assurance LLP | | 2008 |
| Hobbs Roofing Limited | Construction | 2021 |
| Hockett Hawthorn Holdings Limited | Financial services | 2021 |
| Hodie Limited | Real estate | 2000 |
| Hoff Productions Limited | Information & communication | 2006 |
| Hold on Ltd | Arts & recreation | 2024 |
| Holden Jones Financial Resourcing Limited | Administrative & support | 2016 |
| Holdford Landscapes Ltd | Administrative & support | 2023 |
| Holdway Services Limited | Construction | 2011 |
| Holistic Gain Ltd | Wholesale & retail | 2021 |
| Holistic Health TCM Limited | Health & social care | 2026 |
| Holistic Property Limited | Real estate | 2023 |
| Hollaroo Limited | Administrative & support | 2006 |
| Holloway and Holloway Architects Ltd | Professional & scientific | 2021 |
| Holloway Capital Holdings Limited | Real estate | 2025 |
| Holly Tree Cottages Limited | Real estate | 2000 |
| Hollywood Nails CH Ltd | Other services | 2022 |
| Holms Sand & Gravel Company (1985)(THE) | Professional & scientific | 1924 |
| Holms Sand & Gravel Company Limited(The) | Financial services | 1985 |
| Holyport Autos Limited | Wholesale & retail | 2025 |
| Holyport College | Education | 2012 |
| Holyport College Foundation | Administrative & support | 2023 |
| Holyport Community Football Club Limited | Arts & recreation | 2022 |
| Holyport Developments Limited | Construction | 2018 |
| Holyport Limited | Wholesale & retail | 2003 |
| Holyport Properties Ltd | Construction | 2019 |
| Holyportal Limited | Extraterritorial | 2012 |
| Home Clean Garden Clean Ltd | Manufacturing | 2026 |
| Home for a Night Ltd | Hospitality | 2022 |
| Home Network Solutions Berkshire Ltd. | Information & communication | 2019 |
| Homecomfort Residents Co. Limited | Other services | 1988 |
| Homefeed AI Limited | Information & communication | 2026 |
| Homelife Warehouse Ltd | Wholesale & retail | 2016 |
| Homes (East Anglia) Limited | Professional & scientific | 1961 |
| Hometoschool Ltd | Transport & logistics | 2024 |
| Honar Holdings Ltd | Other services | 2015 |
| Honey Parkes Consulting Limited | Professional & scientific | 2014 |
| Honeyspoon Limited | Manufacturing | 2016 |
| Honor & Olivier French Vintage Furniture Ltd | Wholesale & retail | 2017 |
| Hoopla Digital Ltd | Information & communication | 2014 |
| Hoopla Property Ltd | Real estate | 2023 |
| Hope Eco Ltd | Extraterritorial | 2020 |
| Hopewell Housing Developments Limited | Construction | 2021 |
| Horand Limited | Construction | 2023 |
| Horizon Express Limited | Transport & logistics | 2002 |
| Horizon Simulation Limited | Wholesale & retail | 2003 |
| Hormonehappycult Ltd | Wholesale & retail | 2025 |
| Hornbuckle Livery Limited Liability Partnership | | 2002 |
| Horona Investments Limited | Financial services | 2015 |
| Horsell Childcare Limited | Education | 2023 |
| Horsell Educational Support Limited | Education | 2026 |
| Hortisolis City Limited | Real estate | 2016 |
| Hortisolis Limited | Financial services | 2015 |
| Hot Kettle Ltd | Hospitality | 2018 |
| Hot Rock Stone Cleaning Ltd | Administrative & support | 2025 |
| Hought Homes Limited | Real estate | 2018 |
| HOUGHTHMO2 Limited | Real estate | 2023 |
| House of Aeiou Ltd | Manufacturing | 2022 |
| House of Jaxx Ltd | Hospitality | 2023 |
| House of Kane Limited | Construction | 2020 |
| House of London Limited | Extraterritorial | 2007 |
| Housemotor Limited | Professional & scientific | 1995 |
| Houseofl Limited | Real estate | 2022 |
| Houseprice Limited | Professional & scientific | 1995 |
| Houserate Limited | Financial services | 1995 |
| Housestars Tech Ltd | Information & communication | 2021 |
| Housing Solutions Capital PLC | Real estate | 2012 |
| Housing Solutions Development Ltd | Construction | 2016 |
| Howard Holdings Limited | Other services | 2023 |
| HOX Properties Limited | Real estate | 2025 |
| HP Design Ltd | Professional & scientific | 2025 |
| HPL Albany House Developments Limited | Professional & scientific | 1988 |
| HPL Investments Limited | Professional & scientific | 1990 |
| HPL Properties Limited | Financial services | 1992 |
| HPL Property Limited | Financial services | 1984 |
| HPL West London Developments Limited | Professional & scientific | 1988 |
| Hptt Limited | Real estate | 2019 |
| HQ Inns Ltd | Hospitality | 2024 |
| HR Gibbs Ltd | Information & communication | 2018 |
| HRH Buchey Investments Limited | Real estate | 2019 |
| Hrprs Ltd | Wholesale & retail | 2023 |