| Hamilton Brandon Gate Assets Limited | Real estate | 2022 |
| Hamilton Development Homes Limited | Real estate | 2019 |
| Hamilton Dixon Limited | Administrative & support | 2013 |
| Hamilton Food Limited | Hospitality | 2025 |
| Hamilton Handyman Ltd | Real estate | 2026 |
| Hamilton Hanson Limited | Construction | 2024 |
| Hamilton Heath Estates (NO. 2) Limited | Real estate | 2006 |
| Hamilton Heath Estates Limited | Real estate | 1999 |
| Hamilton Heath Group Limited | Real estate | 2012 |
| Hamilton Heath Property Company Limited | Real estate | 1997 |
| Hamilton House (Liverpool) RTM Company Limited | Households | 2024 |
| Hamilton Lansbury Limited | Other services | 2021 |
| Hamilton Locke & Co. Limited | Extraterritorial | 2007 |
| Hamilton Palace Assets Limited | Real estate | 2021 |
| Hamilton Plant U.K Limited | Construction | 2016 |
| Hamilton Portfolio 4 Ltd | Real estate | 2022 |
| Hamilton Properties Manchester Ltd | Real estate | 2024 |
| Hamilton Sudlow Systems Engineering Limited | Administrative & support | 2013 |
| Hamilton-Smith Food Services Limited | Hospitality | 2026 |
| Hamilton-Smith Motor Company Limited | Wholesale & retail | 2026 |
| Haminyan | Other services | 2026 |
| Hamira Property Limited | Real estate | 2023 |
| Hamish Creates Limited | Information & communication | 2025 |
| Hamlaoui Ltd | Wholesale & retail | 2022 |
| Hamlet Rentals Limited | Real estate | 2021 |
| Hammad Malik Ltd | Health & social care | 2009 |
| Hammad Official Ltd | Wholesale & retail | 2025 |
| Hammer Propco Limited | Financial services | 2025 |
| Hammer Property Maintenance Ltd | Construction | 2018 |
| Hammerton Property Limited | Households | 2018 |
| Hammerz Ltd | Hospitality | 2022 |
| Hammock Financial Services Ltd | Financial services | 2019 |
| Hammon Consulting Ltd | Information & communication | 2023 |
| Hammond and Heywood Limited | Construction | 2025 |
| Hammond Financial Planning Limited | Financial services | 2020 |
| Hammond House Investments International Limited | Professional & scientific | 1984 |
| Hammond House Investments Limited | Professional & scientific | 1984 |
| Hammond Raggett & Company Limited | Financial services | 2000 |
| Hammond Raggett Holdings Ltd | Financial services | 2012 |
| Hammy Look Ltd | Wholesale & retail | 2022 |
| Hamnam Limited | Wholesale & retail | 2025 |
| Hamnett Electrical Services Ltd | Construction | 2018 |
| Hampden Park Properties Limited | Real estate | 2022 |
| Hampers & Hampers Limited | Wholesale & retail | 2015 |
| Hampies Limited | Wholesale & retail | 2015 |
| Hampsey Holdings Ltd | Real estate | 2025 |
| Hampshire Property Investments Ltd | Real estate | 2018 |
| Hampshire Topco Limited | Professional & scientific | 2012 |
| Hampson Developments Limited | Information & communication | 2003 |
| Hampson Homes Planned Maintenance Limited | Administrative & support | 2019 |
| Hampsons Leisure World Limited | Extraterritorial | 1987 |
| Hampsons Plant World Limited | Manufacturing | 1990 |
| Hampstead Properties Services (NW) Limited | Real estate | 2015 |
| Hampton Homes UK Limited | Real estate | 2005 |
| Hampton House Management Co Ltd | Households | 1997 |
| Hampton House Middleton Ltd | Real estate | 2026 |
| Hampton Project Services Ltd | Professional & scientific | 2025 |
| Hampton Road Medical Services Ltd | Health & social care | 2012 |
| Hamptons Commercial Limited | Real estate | 2025 |
| Hamptons Space Ltd. | Construction | 2020 |
| Hams Fashion Ltd | Wholesale & retail | 2025 |
| Hamsai Ventures Ltd | Wholesale & retail | 2024 |
| Hamsard 3572 Limited | Financial services | 2020 |
| Hamsard 3574 Limited | Financial services | 2020 |
| Hamsard 3575 Limited | Extraterritorial | 2020 |
| Hamsard 3576 Limited | Extraterritorial | 2020 |
| Hamsard 3669 Limited | Extraterritorial | 2022 |
| Hamsard 3670 Limited | Extraterritorial | 2022 |
| Hamsard 3671 Limited | Extraterritorial | 2022 |
| Hamt Ltd | Hospitality | 2022 |
| Hamto Limited | Wholesale & retail | 2024 |
| Hamwic Homes Limited | Construction | 2021 |
| Hamwood Properties Ltd | Real estate | 2026 |
| Hamza Adamu Ltd | Health & social care | 2023 |
| Hamza Afzal Ltd | Wholesale & retail | 2025 |
| Hamza Al-Maharmah for Wholesale and Retail Trade Ltd | Wholesale & retail | 2026 |
| Hamza Car Body Limited | Wholesale & retail | 2024 |
| Hamza Convenience Ltd | Hospitality | 2017 |
| Hamza Education & Welfare Group Limited | Education | 2025 |
| Hamza Ellahi Ltd | Hospitality | 2026 |
| Hamza Engineering Services Ltd | Professional & scientific | 2026 |
| Hamza Entreprises Limited | Transport & logistics | 2017 |
| Hamza K Ltd | Wholesale & retail | 2019 |
| Hamza Ladi Limited | Real estate | 2025 |
| Hamza Private Limited | Wholesale & retail | 2025 |
| Hamza Property Services Ltd | Real estate | 2024 |
| Hamza Shakoor Ltd | Financial services | 2018 |
| Hamza Sheikh Ltd | Manufacturing | 2026 |
| Hamza Toher & Brothers Ltd | Agriculture & fishing | 2024 |
| Hamza Transport Ltd | Transport & logistics | 2019 |
| Hamzulls Limited | Administrative & support | 2024 |
| HAN Consult Limited | Construction | 2018 |
| HAN Weizhen Ltd | Wholesale & retail | 2025 |
| Han.Creative Productions Limited | Information & communication | 2024 |
| Hana Global Ltd | Wholesale & retail | 2023 |
| Hana Property Services Ltd | Construction | 2022 |
| Hana's Nails Ltd | Other services | 2018 |
| Hanad Trading Ltd | Wholesale & retail | 2026 |
| Hanako Media Ltd | Information & communication | 2023 |
| Hanam Investments (UK) Ltd | Financial services | 2025 |