| Hijama at Home Ltd | Other services | 2024 |
| HIK Investments Ltd | Real estate | 2024 |
| Hikaya Ltd | Professional & scientific | 2025 |
| Hikma Beauty Products Limited | Wholesale & retail | 2023 |
| Hikmah Construction Limited | Real estate | 2017 |
| Hikmah Consulting Limited | Other services | 2014 |
| Hikmah Holdings Ltd | Financial services | 2025 |
| Hikvix Ltd | Wholesale & retail | 2021 |
| Hilborea Construction Ltd | Construction | 2020 |
| Hilcrest Solicitors GB Limited | Professional & scientific | 2015 |
| Hildon Energy Ltd | Construction | 2024 |
| Hildon Solutions Ltd | Construction | 2024 |
| Hill Hire Rainham Essex Ltd | Transport & logistics | 2025 |
| Hill-Tech Limited | Wholesale & retail | 2022 |
| Hillfire Enterprise Ltd | Administrative & support | 2021 |
| Hillgreen Property Ltd | Real estate | 2000 |
| Hills Consortium Limited | Real estate | 2005 |
| Hills Estate Ltd | Real estate | 2015 |
| Hillside Plumbing Ltd | Construction | 2025 |
| Hilton Building & Removals Limited | Construction | 2025 |
| Hilton Cosmetics Limited | Wholesale & retail | 2024 |
| HIM & SHE Ltd | Wholesale & retail | 2025 |
| Himalaya Care Services Ltd | Health & social care | 2023 |
| Himalyan Buildtech Limited | Construction | 2025 |
| Hinata Ltd | Wholesale & retail | 2020 |
| Hindi Shiksha Parishad UK Limited | Administrative & support | 2019 |
| Hindocha Consultancy Ltd | Administrative & support | 2013 |
| Hinson Hurst Fleet Limited | Administrative & support | 2026 |
| Hinson Hurst Group Limited | Financial services | 2026 |
| Hinson Hurst Limited | Transport & logistics | 2026 |
| Hintonwood Construction Limited | Construction | 2018 |
| HIQ Creators Ltd | Construction | 2019 |
| Hira Estates Limited | Real estate | 2025 |
| Hira Locum Ltd | Health & social care | 2022 |
| Hire Scooters Ltd | Administrative & support | 2024 |
| HIRE2CARE Limited | Hospitality | 2023 |
| Hirely Ltd | Administrative & support | 2024 |
| Hiring Manager Limited | Administrative & support | 2024 |
| Hiring Talents Ltd | Administrative & support | 2023 |
| Hirondelle Trading Ltd | Wholesale & retail | 2025 |
| Hirwaun Holdings Limited | Hospitality | 2021 |
| Hisashi Coffee Ilford Ltd | Hospitality | 2024 |
| Hisell Limited | Wholesale & retail | 2025 |
| Historical Homes Limited | Real estate | 2021 |
| Hiview Construction Ltd | Construction | 2023 |
| Hiview Solicitors Ltd | Professional & scientific | 2023 |
| Hiya Naksh Enterprises Ltd | Construction | 2019 |
| Hiyan Softtech Ltd | Information & communication | 2025 |
| HJ Cars Ltd | Wholesale & retail | 2025 |
| HJ Construction (London) Ltd | Construction | 2011 |
| HJ Properties (London) Ltd | Real estate | 2024 |
| HJC Pharma Limited | Health & social care | 2026 |
| HJK Events Ltd | Hospitality | 2012 |
| HJN Core Services Ltd | Health & social care | 2026 |
| HJR Stock Holdings Limited | Real estate | 2022 |
| HJR Stock Limited | Real estate | 2021 |
| HJT Transport Ltd | Transport & logistics | 2016 |
| HK BOW Ltd | Real estate | 2021 |
| HK Brand Ltd | Wholesale & retail | 2022 |
| HK Care Ltd | Health & social care | 2009 |
| HK Executive Transport Ltd | Transport & logistics | 2023 |
| HK International Private Ltd | Real estate | 2025 |
| HK Investments Consultancy Ltd | Professional & scientific | 2023 |
| HK Management Services Ltd | Hospitality | 2022 |
| HK Master Decorating Ltd | Construction | 2026 |
| HK Prestige Motors Limited | Wholesale & retail | 2023 |
| HK Sovereign Estates Limited | Real estate | 2025 |
| HK Store London Ltd | Wholesale & retail | 2026 |
| HKA Trading and Marketing Ltd | Professional & scientific | 2015 |
| HKC Builders Ltd | Construction | 2023 |
| HKD Real Estates LLP | | 2018 |
| Hkdm Properties Limited | Real estate | 2023 |
| Hkfm Ltd | Administrative & support | 2023 |
| HKI Taste Ltd | Hospitality | 2024 |
| HKL Accountants Limited | Professional & scientific | 2016 |
| HKL Bookkeeping Limited | Professional & scientific | 2026 |
| HKL Car Wash Ltd | Wholesale & retail | 2023 |
| HKP Property Ltd | Real estate | 2025 |
| HKQ Incorporated Limited | Administrative & support | 2019 |
| HKR Hair and Beauty Ltd | Other services | 2023 |
| Hksm Ltd | Administrative & support | 2024 |
| Hkzu Catering Ltd | Hospitality | 2026 |
| HL Law Ltd | Professional & scientific | 2025 |
| HL Online Training Limited | Education | 2017 |
| Hlcoats Ltd | Manufacturing | 2025 |
| HLH Accountants Limited | Professional & scientific | 2011 |
| HLH Services Solution Ltd | Administrative & support | 2019 |
| HLK Limited | Wholesale & retail | 2025 |
| HLM Property Ltd | Real estate | 2025 |
| HM Aquatics Ltd | Wholesale & retail | 2025 |
| HM Barber Salon Limited | Wholesale & retail | 2025 |
| HM Builders London Ltd | Construction | 2023 |
| HM Caterers Ltd | Hospitality | 2023 |
| HM Childminding Limited | Health & social care | 2023 |
| HM Developments Limited | Real estate | 2017 |
| HM Ecom Ltd | Wholesale & retail | 2025 |
| HM Education Group Ltd | Wholesale & retail | 2025 |
| HM Fruit & VEG Delivery Limited | Wholesale & retail | 2024 |
| HM Global Packaging Ltd | Administrative & support | 2021 |
| HM London Traders Ltd | Wholesale & retail | 2026 |