| Honghu Mould Limited | Extraterritorial | 2019 |
| Hongkong Garden 2021 Ltd | Hospitality | 2021 |
| Hongkong Well Beauty Industrial Ltd | Administrative & support | 2013 |
| Hongsheng Plastic Products Co., Ltd | Administrative & support | 2024 |
| Hongsheng Trade Co., Ltd | Administrative & support | 2021 |
| Hongteng Metal Manufacture Co., Ltd | Extraterritorial | 2011 |
| Hongwang Steel Co Ltd | Administrative & support | 2022 |
| Hongwei Marine (Guangzhou) Co., Ltd | Administrative & support | 2024 |
| Hongwen Trading Co., Ltd | Administrative & support | 2022 |
| Hongwotrading Co. Ltd | Administrative & support | 2021 |
| Hongxiang Trade Limited | Wholesale & retail | 2019 |
| Honiley Estates Limited | Real estate | 1985 |
| Honiley Farms Limited | Agriculture & fishing | 1982 |
| Honwa Marine Service Co., Ltd | Administrative & support | 2024 |
| Honza Management Ltd | Transport & logistics | 2019 |
| Hookah Hardware Craft Co., Ltd | Wholesale & retail | 2021 |
| Horizon Intel Limited | Information & communication | 2025 |
| Hornbeam Securities Limited | Financial services | 2020 |
| Hornbeam Ventures Limited | Financial services | 2020 |
| Hosting Plus Ltd | Information & communication | 2019 |
| Hotspothq Ltd | Information & communication | 2021 |
| House of Beauty (Kenilworth) Ltd | Other services | 2002 |
| House of Beauty Aesthetics Ltd | Other services | 2020 |
| House Technologies Ltd | Wholesale & retail | 2024 |
| Housing and Public Policy Records Limited | Professional & scientific | 2014 |
| Howell Fortune Limited | Administrative & support | 2012 |
| Howle Engineering Ltd | Professional & scientific | 2015 |
| Hozeal Group Co., Ltd. | Wholesale & retail | 2017 |
| Hr-Zn Corp Ltd | Professional & scientific | 2025 |
| Huafeng Chemical Co., Ltd. | Administrative & support | 2026 |
| Hualin International Trading Co., Limited | Extraterritorial | 2017 |
| Hualu Trading Co., Ltd | Extraterritorial | 2017 |
| Huangda Plastic Co., Ltd | Administrative & support | 2023 |
| Huaxin Clothing Co., Ltd | Administrative & support | 2023 |
| Huayi Sanitary Ware Company Limited | Wholesale & retail | 2021 |
| Huayida International Trading Co., Ltd | Manufacturing | 2023 |
| Hubbards Florist Coventry Limited | Wholesale & retail | 2025 |
| Hubbards Florist Ltd | Wholesale & retail | 2025 |
| Hubbards Florist Services Ltd | Wholesale & retail | 2025 |
| Hudson Builds Ltd | Construction | 2023 |
| Hutton Brown Ltd | Construction | 2026 |
| Hvac Supplies Limited | Wholesale & retail | 2025 |
| HW Homes (Baslsall Common) Ltd | Construction | 2025 |
| Hyaridge Limited | Real estate | 2025 |
| Hybrid Media Interactive Ltd | Professional & scientific | 2019 |
| Hybridised Assets Ltd | Real estate | 2023 |
| Hybridised Solutions Limited | Information & communication | 2015 |
| Hyde House Management Limited | Real estate | 1990 |
| Hyfire Wireless Fire Solutions Limited | Administrative & support | 2007 |
| Hygirel Technology Co., Limited | Professional & scientific | 2014 |
| HYW UK Ltd | Wholesale & retail | 2023 |
| HZZ Trading Limited | Wholesale & retail | 2026 |
| I-Equip PTS Ltd | Wholesale & retail | 2023 |
| IAG Services Ltd | Professional & scientific | 2022 |
| Ibis Woodcraft Limited | Manufacturing | 2009 |
| Ice Productions Limited | Information & communication | 1999 |
| Icom Energy Association Limited | Administrative & support | 2003 |
| Idiagnostix Ltd | Professional & scientific | 2024 |
| IEL Investments 82 Ltd | Real estate | 2022 |
| IEM Productions Limited | Manufacturing | 2023 |
| IFL Limited | Extraterritorial | 2003 |
| Ikigaisystem Limited | Arts & recreation | 2020 |
| Iknow Ltd | Extraterritorial | 2011 |
| Illuminate VR Services Ltd | Health & social care | 2013 |
| Illustrate HER Ltd | Other services | 2023 |
| Imlpo Ltd | Professional & scientific | 2005 |
| IMP Castle Associates Limited | Professional & scientific | 2010 |
| Impenza ATP Limited | Administrative & support | 2023 |
| Impenza Investments Limited | Real estate | 2012 |
| Impenza Limited | Administrative & support | 2011 |
| Imperial Art Ltd | Arts & recreation | 2015 |
| Imperial Renovation Kenilworth Limited | Construction | 2023 |
| Impulse MVM Limited | Professional & scientific | 2019 |
| Incedendo Limited | Other services | 2017 |
| Independent Hairdressing Limited | Other services | 2008 |
| Indev Ltd | Education | 2010 |
| Indian ARK Kenilworth Ltd | Hospitality | 2020 |
| Indian ARK Restaurant Ltd | Hospitality | 2024 |
| Indianna Blue Limited | Education | 2025 |
| Indigo Computer Systems Limited | Information & communication | 2004 |
| Indonesian Smes Community UK Ltd | Hospitality | 2021 |
| Indra Solutions Limited | Information & communication | 2011 |
| Indysourcing Limited | Construction | 2010 |
| Ineco Energy Limited | Administrative & support | 2016 |
| Infee Leather Goods Co., Ltd | Administrative & support | 2015 |
| Infinity Tech Industrial Co Ltd | Extraterritorial | 2019 |
| Infration Limited | Real estate | 2018 |
| INH Consultancy Services Limited | Information & communication | 2014 |
| Innovation Event Lighting Ltd | Construction | 2014 |
| Innovation for Agriculture | Public administration | 2013 |
| Innovyance Ltd | Information & communication | 2025 |
| Inovu Lifestyle Limited | Manufacturing | 2022 |
| Inside Events Ltd | Professional & scientific | 2008 |
| Insightably Ltd | Professional & scientific | 2020 |
| Inspire Drone Media Ltd | Information & communication | 2018 |
| Inspire Pilates and Physiotherapy Limited | Extraterritorial | 2021 |
| Instant Impact Education Ltd | Education | 2025 |
| Institute of the Horse | Education | 1999 |
| Integratus Limited | Financial services | 2011 |
| Intelligent Residential Design Limited | Professional & scientific | 2011 |