| Househunter Ltd | Real estate | 2009 |
| Housenda Ltd | Construction | 2026 |
| Houseract Ltd | Construction | 2020 |
| Housify Limited | Real estate | 2018 |
| Housing Management Solutions Limited | Professional & scientific | 2022 |
| HOW Much? Limited | | 1992 |
| Howard G Ltd | Professional & scientific | 2020 |
| Howard Walters Ltd | Professional & scientific | 2017 |
| Hoxha Construction (UK) Limited | Construction | 2007 |
| Hoxton Props Limited | Information & communication | 2026 |
| Hozifz London Limited | Other services | 2020 |
| HP Associates Limited | Construction | 2015 |
| HP Industries Limited | Wholesale & retail | 2022 |
| HP Tech Limited | Information & communication | 2015 |
| HP Trade Hub Ltd | Wholesale & retail | 2025 |
| Hpil SPV 01 Limited | Real estate | 2017 |
| Hpil SPV 02 Limited | Real estate | 2017 |
| Hpizza Ltd | Hospitality | 2023 |
| HPK Accountancy Services Limited | Professional & scientific | 2017 |
| HPM Properties Limited | Professional & scientific | 2005 |
| Hprr Limited | Real estate | 2023 |
| HPS Services (London) Ltd | Transport & logistics | 2019 |
| HQ Event Management Ltd | Hospitality | 2024 |
| HQ4 Investments Ltd | Real estate | 2025 |
| HR Best Tradings Ltd | Wholesale & retail | 2023 |
| HR Directline Ltd | Health & social care | 2024 |
| HR Facilities 4U Ltd | Information & communication | 2018 |
| HR Facility 4U Ltd | Administrative & support | 2023 |
| HR Grewal Limited | Wholesale & retail | 2022 |
| HR Hanif Ltd | Professional & scientific | 2025 |
| HR Homecare Services Ltd | Health & social care | 2026 |
| HR International Investment Ltd | Real estate | 2020 |
| HR Kapital Ltd | Other services | 2020 |
| HR London Investment Limited | Real estate | 2021 |
| HR Management U.K Ltd | Real estate | 2021 |
| HR Medico Ltd | Health & social care | 2017 |
| HR Propery Services Ltd | Real estate | 2026 |
| HR Real Estate Group Limited | Real estate | 2026 |
| HR Recruitment and Consultancy Services Ltd | Administrative & support | 2014 |
| HRA Healthcare Ltd | Health & social care | 2020 |
| HRA Investment One Ltd | Real estate | 2023 |
| Hras Property Limited | Real estate | 2023 |
| HRD Construction Ltd | Construction | 2025 |
| Hrdsolutions Limited | Information & communication | 2010 |
| Hrforcesolution Ltd | Administrative & support | 2025 |
| Hris Solutions Ltd | Information & communication | 2017 |
| Hristo & Danaya 63 Ltd | Administrative & support | 2015 |
| Hristo Drive Ltd | Administrative & support | 2016 |
| Hristov Staffing Solutions Limited | Hospitality | 2024 |
| HRJ Connsulting Ltd | Professional & scientific | 2019 |
| HRJ Property Management Ltd | Real estate | 2026 |
| HRL 200 Ltd | Real estate | 2022 |
| HRM Pro Limited | Information & communication | 2024 |
| HRM Recruitment London Ltd | Administrative & support | 2019 |
| Hrmani Kitchen & Bedroom Ltd | Construction | 2018 |
| Hrmax Group Limited | Professional & scientific | 2021 |
| Hrqglow Ltd | Wholesale & retail | 2025 |
| HRS Electrical Ltd | Wholesale & retail | 2017 |
| HRS Estates Ltd | Real estate | 2022 |
| Hrsecurity&Fm Ltd | Construction | 2025 |
| Hrusca Utilities Limited | Other services | 2018 |
| HRV Holdings Ltd | Financial services | 2023 |
| HRZ Enterprise Trading Ltd | Wholesale & retail | 2020 |
| HRZ Tech Ltd | Information & communication | 2023 |
| HS - Mini Mentors, Mega Minds Ltd | Arts & recreation | 2025 |
| HS 57 Ltd | Wholesale & retail | 2024 |
| HS Beauty Ltd | Other services | 2024 |
| HS Constructions Ltd | Construction | 2014 |
| HS Electrical & Installation Ltd | Construction | 2024 |
| HS Facilities Management Ltd | Administrative & support | 2024 |
| HS Global Trade Ltd | Wholesale & retail | 2025 |
| HS Graphic Machinery Limited | Wholesale & retail | 2021 |
| HS London Construction Ltd | Construction | 2025 |
| HS Olive Properties Ltd | Real estate | 2021 |
| HS Technical Services Limited | Professional & scientific | 2019 |
| HSA Buildings Ltd | Construction | 2023 |
| HSA Partnership Limited | Other services | 2022 |
| Hsaff Holdings Limited | Real estate | 2020 |
| Hsan Food Limited | Hospitality | 2025 |
| HSB Care Ltd | Health & social care | 2023 |
| HSB Construction Ltd | Construction | 2018 |
| HSB Windows & Doors Limited | Households | 2023 |
| HSD Real Estate Ltd | Real estate | 2024 |
| Hsga 66 Ltd | Real estate | 2023 |
| Hsga Holdings Ltd | Financial services | 2023 |
| Hsgh Ltd | Hospitality | 2025 |
| Hshpl Limited | Health & social care | 2017 |
| HSJ Engineering Ltd | Construction | 2013 |
| HSK Cleaning Limited | Administrative & support | 2024 |
| Hsuk Ltd | Transport & logistics | 2017 |
| HSV Consulting Limited | Information & communication | 2015 |
| HSY Systems Limited | Other services | 2022 |
| HT Construction & Maintenance Ltd | Manufacturing | 2021 |
| HT Consultancy Services Ltd | Professional & scientific | 2022 |
| HT Dwellings Limited | Real estate | 2026 |
| HT Traders Ltd | Wholesale & retail | 2024 |
| HT Trading Ltd | Other services | 2023 |
| HTECH1 Solutions Limited | Real estate | 2018 |
| HTS Investments Ltd | Manufacturing | 2019 |
| Htyz Properties Ltd | Real estate | 2026 |