| Hela Properties Ltd | Real estate | 2025 |
| Hele & NA Limited | Wholesale & retail | 2025 |
| Helen New Communications Ltd | Professional & scientific | 2012 |
| Helix Strategy Limited | Administrative & support | 2025 |
| Hellequin Electrical Ltd | Construction | 2024 |
| Hello Freak Limited | Information & communication | 2012 |
| Helo Insurance Services Ltd | Financial services | 2009 |
| Heloves Consult Ltd | Administrative & support | 2023 |
| Help to Build Services Ltd | Construction | 2024 |
| Help Young People Thrive Ltd | Health & social care | 2023 |
| Helperton Limited | Wholesale & retail | 1985 |
| Helping Hands DOT UK Ltd | Health & social care | 2024 |
| Helping Hands Health Care Limited | Health & social care | 2023 |
| Helping Youth Ltd | Health & social care | 2024 |
| Helyy Ltd | Wholesale & retail | 2025 |
| Henbie House Ltd | Wholesale & retail | 2012 |
| Henbie Limited | Professional & scientific | 2016 |
| Hendon Development London Limited | Construction | 2023 |
| Henley Building Services Limited | Construction | 2003 |
| Hense Films Ltd | Information & communication | 2022 |
| Hephzibah Care Services Ltd | Administrative & support | 2022 |
| HER Rightful Place Limited | Other services | 2025 |
| Hera Invest Limited | Real estate | 2020 |
| Heramba Estates Limited | Real estate | 2025 |
| Heran Ltd | Hospitality | 2024 |
| Here Domestic Repairs Ltd | Construction | 2021 |
| Heretothere Ltd | Transport & logistics | 2026 |
| Heritage London (Ilford) Limited | Real estate | 2019 |
| Heritage Plaster Services Limited | Construction | 2013 |
| Hermen Services Limited | Information & communication | 2022 |
| Hertford Realty Ltd | Real estate | 2014 |
| Hesed Investments Limited | Real estate | 2022 |
| Hesson Motors Ltd | Wholesale & retail | 2021 |
| Hetal Shah Limited | Real estate | 2021 |
| HEV Solutions Ltd | Wholesale & retail | 2025 |
| Hexa Traders Ltd | Wholesale & retail | 2021 |
| Hexad LLP | | 2021 |
| Hexasoft Ltd | Information & communication | 2015 |
| Heybridge Pharma Limited | Wholesale & retail | 2024 |
| Heylux Limo Ltd | Transport & logistics | 2023 |
| HF Publishing Ltd | Information & communication | 2016 |
| HFA Online Ltd | Hospitality | 2025 |
| HFA Support Services Ltd | Administrative & support | 2012 |
| HG & Partners Ltd | Wholesale & retail | 2024 |
| HG Health Limited | Health & social care | 2013 |
| HG4K Limited | Financial services | 2023 |
| HGA Accountants Ltd | Professional & scientific | 2012 |
| HGA Group Ltd | Real estate | 2022 |
| HGC Projects Limited | Construction | 2026 |
| HGJ Foods Group Ltd | Hospitality | 2024 |
| HGJ Foods Ltd | Hospitality | 2020 |
| Hgrv Ltd | Professional & scientific | 2024 |
| HGW Builders Ltd | Construction | 2026 |
| HH Consruction Ltd | Construction | 2018 |
| Hh&T Properties Ltd | Real estate | 2026 |
| HHA Courier Ltd | Transport & logistics | 2025 |
| HI (Farnborough) Limited | Hospitality | 2003 |
| HI (Hemel Hempstead) Limited | Hospitality | 2003 |
| HI (London Gatwick) Limited | Hospitality | 2003 |
| HI (Reading South) Limited | Hospitality | 2003 |
| HI (Southampton) Limited | Hospitality | 2003 |
| HI Consultants Ltd | Information & communication | 2013 |
| HI Fresh Box Ltd | Wholesale & retail | 2020 |
| HI Fresh Limited | Wholesale & retail | 2016 |
| HI Peptides Ltd | Health & social care | 2025 |
| Hi-Stanford Scaffolding Limited | Construction | 2018 |
| Hi-Um Ltd | Wholesale & retail | 2024 |
| HIA Medical Ltd | Health & social care | 2023 |
| HIA Property Management Ltd | Real estate | 2025 |
| Hicp Holdings Limited | Hospitality | 2015 |
| Hicp Limited | Hospitality | 2015 |
| Hidden Assets Limited | Construction | 2016 |
| Hidden-Talented Services Ltd | Health & social care | 2024 |
| Higgins Proviso Ltd | Construction | 1998 |
| High END Motors Ltd | Wholesale & retail | 2021 |
| High Point Services Ltd | Real estate | 2023 |
| High Sky Care Limited | Health & social care | 2025 |
| High Street Kebabish Ltd | Hospitality | 2023 |
| High Ticket Enterprises Ltd | Professional & scientific | 2026 |
| Highams Park Construction Ltd | Construction | 2017 |
| Highbridge International Trading Company Limited | Wholesale & retail | 2006 |
| Highgrove Heritage Ltd | Real estate | 2025 |
| Highlands Consultancy Limited | Professional & scientific | 2023 |
| Highwall Projects Limited | Construction | 2024 |
| Highway Property Developments Ltd | Real estate | 2024 |
| Highway Vehicle Maintenance Limited | Manufacturing | 1983 |
| Highways Business Development Solutions Ltd | Professional & scientific | 2024 |
| Highwood Optom Limited | Wholesale & retail | 2022 |
| Hiki Solutions Limited | Information & communication | 2007 |
| Hilands Property Partners LLP | | 2007 |
| Hilde Anvik EEC Limited | Wholesale & retail | 2025 |
| Hill More Group Limited | Hospitality | 2025 |
| Hill Park Property Holdings Limited | Financial services | 2022 |
| Hill Services Ltd | Construction | 2025 |
| Hill Supplies Ltd | Wholesale & retail | 2024 |
| Hill's Safety Compliance Group Ltd | Construction | 2025 |
| Hillcrest Court (Collier ROW) Management Limited | Households | 1993 |
| Hillcrestkak Limited | Health & social care | 2016 |
| Hilldene Laundrette & DRY Cleaners Ltd | Other services | 2006 |
| Hillmar Homes Ltd | Real estate | 2016 |