| Howaye Textiles Company Limited | Extraterritorial | 2016 |
| Howell Electrical Services Limited | Energy | 2019 |
| Howes Court Management Limited | Households | 2008 |
| Howling Notes Ltd | Arts & recreation | 2024 |
| Hownor 24 Limited | Financial services | 2023 |
| Howsu Limited | Wholesale & retail | 2026 |
| Hoxon Consulting Limited | Professional & scientific | 2023 |
| Hoyang International Trade Co., Ltd | Wholesale & retail | 2024 |
| Hoylake Homes Limited | Real estate | 2018 |
| Hoyle Productions Limited | Information & communication | 2003 |
| HP & KP Ltd | Education | 2011 |
| HP Carpentry Limited | Construction | 2022 |
| HP Landscapes & Construction Limited | Construction | 2026 |
| HP Pharma Consulting Limited | Professional & scientific | 2023 |
| HP3 Developments (Northampton) Limited | Construction | 2006 |
| HP3 Developments Limited | Professional & scientific | 2004 |
| HP3 Limited | Professional & scientific | 2006 |
| HP3 Swadlincote Limited | Construction | 2007 |
| HPB Specialist Services Limited | Health & social care | 2024 |
| HPG Gonville Limited | Real estate | 2017 |
| HPP Day Limited | Extraterritorial | 2018 |
| HPS Property Solutions Limited | Real estate | 2024 |
| HQ Nights Ltd | Administrative & support | 2013 |
| HRC Engineering and Resources International Limited | Administrative & support | 2018 |
| HRG Consultancy Ltd | Professional & scientific | 2018 |
| Hrnr Limited | Financial services | 2025 |
| HRP Consulting and Training Limited | Professional & scientific | 2007 |
| HS Fashion and Consultancy Ltd | Professional & scientific | 2023 |
| HS Secretarial Limited | Professional & scientific | 2000 |
| HSB Fashions Limited | Wholesale & retail | 2021 |
| Hsbc UK Enterprise Fund for East Anglia & the Home Counties | | 1997 |
| HSC Global Limited | Wholesale & retail | 2022 |
| HSE Innovations Limited | Professional & scientific | 2025 |
| HSE Technology Ltd | Information & communication | 2017 |
| HSG Intermediary Ltd | Financial services | 2020 |
| HSG Securities Ltd | Real estate | 2020 |
| Hsky Technology Limited | Wholesale & retail | 2012 |
| HT Builds Ltd | Real estate | 2026 |
| HT Legacy Ltd | Real estate | 2024 |
| HT Smart Ltd | Real estate | 2026 |
| HTC Technology Ltd | Professional & scientific | 2010 |
| HTC Welding Fit to Work Ltd | Manufacturing | 2023 |
| Htip Limited | Professional & scientific | 2006 |
| HTS Commercial Limited | Construction | 2020 |
| HTS Estates Limited | Real estate | 1976 |
| HTS Residential Limited | Real estate | 2015 |
| HUA Shang Investment Limited | Financial services | 2019 |
| HUA Tong Equipment Limited | Wholesale & retail | 2023 |
| Huagang Limited | Manufacturing | 2025 |
| Hualel Holdings Limited | Manufacturing | 2019 |
| Huamao Climatech Company Ltd | Manufacturing | 2020 |
| Huang JIA Guard (UK) Group Limited | Manufacturing | 2026 |
| Huangyiting Lighting Co., Ltd | Wholesale & retail | 2023 |
| Huansu Group Co., Limited | Manufacturing | 2018 |
| Huanuo Metal Co., Ltd | Wholesale & retail | 2021 |
| Huatao Lover Ltd | Manufacturing | 2016 |
| Huawei Refractories Co., Ltd | Extraterritorial | 2011 |
| Huawei Technologies Research & Development (UK) Limited | Information & communication | 2010 |
| Huaxin Plastic Group Co., Ltd | Manufacturing | 2025 |
| Huaya Industry Co., Ltd | Wholesale & retail | 2025 |
| Huayang Catering Ltd | Hospitality | 2026 |
| Huayang Shipping Group Co., Ltd | Wholesale & retail | 2025 |
| Huayuan Trading Group Co., Ltd | Wholesale & retail | 2023 |
| Hub Selection Ltd | Administrative & support | 2023 |
| Hubb Digital Limited | Information & communication | 2000 |
| Hubbards Plumbing & Heating Ltd | Construction | 2026 |
| Huber+Suhner Polatis Limited | Manufacturing | 2000 |
| Hubs Solutions Limited | Construction | 2017 |
| Hucasama Ltd | Manufacturing | 2025 |
| HUD Construction Limited | Construction | 2019 |
| Hudan Trading Ltd | Wholesale & retail | 2022 |
| Hudbridge Properties Ltd | Construction | 2025 |
| Hudbridge Property Ltd | Construction | 2025 |
| Hudg Ltd | Wholesale & retail | 2025 |
| Hudson Freeholds Limited | Real estate | 2007 |
| Hudson Global Consulting Limited | Professional & scientific | 2012 |
| Hudson Interiors Ltd | Manufacturing | 2017 |
| Hudson Wells Limited | Manufacturing | 1997 |
| HUG Solutions Limited | Information & communication | 2001 |
| Hugh DE Balsham Limited | Hospitality | 2018 |
| Hughes & Elmes Property Ltd | Real estate | 2026 |
| Hughes Hall Conference Company Limited | Education | 1893 |
| Hughes Hall Limited | Construction | 1996 |
| Hughes Roofing & Building Limited | Construction | 2026 |
| Hugo & Hetties's Ltd | Wholesale & retail | 2025 |
| Hugo Boudjenah Ltd | Manufacturing | 2024 |
| Huhua Plastic Flooring Co., Ltd. | Manufacturing | 2023 |
| HUI HAO Trading Co., Ltd | Extraterritorial | 2023 |
| Huiming Holdings UK Ltd | Wholesale & retail | 2024 |
| Huimu Trade Co., Limited | Extraterritorial | 2025 |
| Hull London Campus Limited | Education | 2023 |
| Hull Online Limited | Education | 2015 |
| HUM the Lights Ltd | Arts & recreation | 2026 |
| Human Lens Limited | Health & social care | 2025 |
| Human Nature Therapy CIC | Health & social care | 2024 |
| Human-Computer Interface Limited | Information & communication | 1986 |
| Humanalogue Ltd | Information & communication | 2014 |
| Humanarium Publishing Limited | Information & communication | 2018 |
| Humanloop Ltd | Information & communication | 2020 |
| Humberstone Residents Estate Management Company Limited | Households | 2006 |