| Honesty Global Trading Ltd | Wholesale & retail | 2025 |
| Honey Hill Mews (1990) Limited | Households | 1990 |
| Honey Therapeutics Ltd | Manufacturing | 2018 |
| Honey Tree Farms Ltd | Agriculture & fishing | 2025 |
| Hong DE MEI Ltd | Education | 2022 |
| Hong Kong Commander Enterprise Management Limited | Professional & scientific | 2026 |
| Hong Kong Gateway Advisory Limited | Information & communication | 2026 |
| Hong Kong Star Numbers Card Technology Co., Limited | Wholesale & retail | 2025 |
| Hong WEI Machinery Co., Limited | Manufacturing | 2015 |
| Hongfa Marine Co., Ltd | Other services | 2021 |
| Hongjin International Trading Limited | Extraterritorial | 2018 |
| Hongkang Sensheng Trading Co., Ltd. | Extraterritorial | 2019 |
| Hongkong Chamey Trading Co., Ltd | Extraterritorial | 2015 |
| Hongkong Hongjia Trading Limited | Wholesale & retail | 2024 |
| Hongkong Huafu Industrial Co., Ltd | Wholesale & retail | 2025 |
| Hongkong Keyray Consultant Limited | Professional & scientific | 2023 |
| Hongkong Sensheng International Co., Ltd. | Wholesale & retail | 2025 |
| Hongkong Sunshine Co., Limited | Extraterritorial | 2013 |
| Hongkong Yuancai Trading Co., Ltd | Wholesale & retail | 2023 |
| Hongqi Limited | Wholesale & retail | 2023 |
| Hongya Company Limited | Manufacturing | 2023 |
| Hongyuan Plastic Trading Co., Ltd | Manufacturing | 2025 |
| Honia Centro Services Co., Ltd | Information & communication | 2022 |
| Honorfoil Technologies Limited | Other services | 2021 |
| Honour Ever Import and Export Limited | Extraterritorial | 2021 |
| Honour Trading Co., Limited | Wholesale & retail | 2023 |
| Honourable World Limited | Wholesale & retail | 2024 |
| Honsit Furniture Ltd | Wholesale & retail | 2024 |
| Hooley Radio Frequency Limited | Professional & scientific | 2019 |
| Hooley Research Limited | Professional & scientific | 1999 |
| Hooray's Limited | Hospitality | 2001 |
| Hopbind Ltd | Hospitality | 2023 |
| Hope House Cambridge Ltd | Real estate | 2025 |
| Hopeful Star Trading Co., Ltd | Manufacturing | 2017 |
| Hopeteck Ltd | Manufacturing | 2025 |
| Hopkins Rooflines Ltd | Construction | 2026 |
| Hopvision Technology Limited | Wholesale & retail | 2024 |
| Horekanny Trading Co., Ltd | Extraterritorial | 2025 |
| Horigap Limited | Wholesale & retail | 2025 |
| Horitec Global Co., Ltd | Manufacturing | 2021 |
| Horizon Cambridge Ltd | Professional & scientific | 2019 |
| Horizon Curate Ltd | Construction | 2025 |
| Horizon Discovery Biosciences Limited | Professional & scientific | 2006 |
| Horizon Discovery Group Limited | Professional & scientific | 2014 |
| Horizon Global Consultancy Limited | Information & communication | 2024 |
| Horizon Matters Realty Ltd | Real estate | 2024 |
| Horizon Real Estates Ltd | Real estate | 2025 |
| Horizon Trade Solutions Ltd | Extraterritorial | 2025 |
| Hormann (Hongkong) Tradeco. Ltd | Administrative & support | 2021 |
| Horn Acoustics LAB (UK) Limited | Manufacturing | 2024 |
| Horningsea Community Interest Company | Hospitality | 2013 |
| Horrut Avionic Services UK Ltd | Manufacturing | 2024 |
| Hors Trade Ltd | Wholesale & retail | 2025 |
| Horseback Holidays Ltd | Administrative & support | 2023 |
| Horta Investments Limited | Professional & scientific | 2005 |
| Horta Properties Limited | Real estate | 1986 |
| Horton Designworks Limited | Information & communication | 2015 |
| Hospitality Active Ltd | Hospitality | 2016 |
| Hosta Group Ltd | Hospitality | 2023 |
| Hot:Haus Design Limited | Professional & scientific | 2003 |
| Hotel Reservation Service Limited | Administrative & support | 2005 |
| Hotpod Yoga Cambridge Ltd | Arts & recreation | 2026 |
| Houghton Park Limited | Wholesale & retail | 1998 |
| House of Cricket Limited | Arts & recreation | 2026 |
| House of Elan Limited | Wholesale & retail | 1989 |
| House of Four Limited | Real estate | 2026 |
| House of Goldhawk Limited | Professional & scientific | 2025 |
| House of Grace Property Limited | Real estate | 2022 |
| House of INK Stapleford Ltd | Other services | 2025 |
| House of Jamieson Limited | Real estate | 2026 |
| House of Luchini Ltd | Real estate | 2021 |
| House of Luchini Properties Limited | Real estate | 2026 |
| House of Mill Limited | Hospitality | 2025 |
| House of Peace School of Ministry (UK) Ltd | Education | 2025 |
| House of Pyaar Ltd | Wholesale & retail | 2023 |
| House of Soco Ltd | Professional & scientific | 2024 |
| House of Zaveri Ltd | Manufacturing | 2025 |
| Houseclean Industrial Limited | Extraterritorial | 2019 |
| Housesmiths Ltd | Real estate | 2019 |
| Houseweald Limited | Real estate | 2002 |
| Housing Development Consultancy Ltd | Construction | 2014 |
| Housing Insight Ltd | Information & communication | 2011 |
| Houston Crest Properties Limited | Real estate | 1962 |
| Houston Global Trade Limited | Information & communication | 2024 |
| Hover, Inc Ltd | Professional & scientific | 2022 |
| HOW DO YOU DO Illustration Agency Ltd | Professional & scientific | 2018 |
| Howard Bedford Limited | Real estate | 2014 |
| Howard Cambridge Limited | Real estate | 2015 |
| Howard Capital Limited | Financial services | 2016 |
| Howard Commercial Holdings Limited | Real estate | 2024 |
| Howard Court Limited | Real estate | 1982 |
| Howard Equity Holdings Limited | Financial services | 2014 |
| Howard Guest and Company Limited | Wholesale & retail | 2015 |
| Howard Investment Company Limited | Real estate | 2005 |
| Howard Langford Limited | Real estate | 2016 |
| Howard Management Services Limited | Real estate | 2022 |
| Howard Parks Homes Limited | Real estate | 2018 |
| Howard Regent Limited | Real estate | 2008 |
| Howard Residential Limited | Real estate | 2014 |
| Howard Sawston Ltd | Real estate | 2010 |