| Hindocha Pandit & Co Ltd | Professional & scientific | 2024 |
| Hindocha Properties LLP | | 2020 |
| Hinton Cyber Systems Ltd | Information & communication | 2020 |
| Hippie Wear Ltd | Wholesale & retail | 2021 |
| Hirani Consultants Limited | Construction | 2012 |
| Hirani Enterprises Ltd | Wholesale & retail | 2021 |
| Hirani Heating & Plumbing Limited | Construction | 2017 |
| Hire Two Hire Limited | Administrative & support | 2015 |
| Hireonel Ltd | Administrative & support | 2018 |
| Hiring Buddy Limited | Administrative & support | 2019 |
| Hisbo Limited | Professional & scientific | 2011 |
| Hisync Technologies Ltd | Professional & scientific | 2015 |
| Hitchco Limited | Households | 1976 |
| Hitchin Consulting Management Limited | Information & communication | 2014 |
| Hive 1 Ltd | Construction | 2015 |
| Hive Corporation Limited | Education | 2020 |
| Hive Group Holdings Limited | Financial services | 2022 |
| Hive UK Homes Limited | Real estate | 2023 |
| Hivello Holdings Ltd | Information & communication | 2022 |
| HJ Investment Limited | Real estate | 2025 |
| HJV Actuarial Limited | Professional & scientific | 2022 |
| HK & Sons Property Limited | Real estate | 2025 |
| Hkpetcare Ltd | Wholesale & retail | 2025 |
| HKS Plumbing Heating & Electrical (2006) Ltd | Construction | 2026 |
| Hlbs Group Limited | Real estate | 2015 |
| Hlbs Properties Limited | Real estate | 2014 |
| Hlbs Property Services Limited | Real estate | 2015 |
| HMD Handyman Plus Ltd | Construction | 2026 |
| HNG Property Limited | Construction | 2026 |
| HNM Engineering Ltd | Construction | 2018 |
| HNV Parts UK Ltd | Wholesale & retail | 2025 |
| HOD Vhodor Ltd | Wholesale & retail | 2024 |
| Hodford Holdings Ltd | Manufacturing | 2024 |
| Hodge Security Limited | Administrative & support | 2018 |
| Hodges Enterprises Limited | Other services | 2008 |
| Hodkins Equipment Ltd | Construction | 2025 |
| Hofenung Foundation | Education | 2020 |
| Hogarth Developments Limited | Construction | 1980 |
| Hoh&Chen Limited | Wholesale & retail | 2025 |
| Holbein House Management Company Limited | Households | 2019 |
| Hold Studio London Ltd. | Professional & scientific | 2020 |
| Holders Hill Road Hendon Management Limited | Households | 1988 |
| Holding Ventures Ltd | Real estate | 2026 |
| Holidaybnb Limited | Hospitality | 2026 |
| Holkham Capital Limited | Professional & scientific | 2014 |
| Holland House School | Education | 1974 |
| Hollas Real Estate Ltd | Real estate | 2020 |
| Hollyfield Management Limited | Administrative & support | 2020 |
| Hollywood & Co Services Ltd | Hospitality | 2016 |
| Holmdale Terrace Limited | Real estate | 2018 |
| Holmwood Engineering Services Ltd | Professional & scientific | 2025 |
| Holywel Ltd | Wholesale & retail | 2018 |
| HOM Catering and Refrigeration Engineers Limited | Manufacturing | 2024 |
| Home & Soul Ltd | Wholesale & retail | 2025 |
| Home Canvas AI Ltd | Information & communication | 2024 |
| Home Edge London Ltd | Real estate | 2016 |
| Home Future Constructions Ltd | Construction | 2018 |
| Home Heating Scheme Limited | Construction | 2014 |
| Home Needs Appliances Repair Ltd | Manufacturing | 2021 |
| Home Pizza Original Ltd | Hospitality | 2020 |
| Home Pride Floor Ltd | Manufacturing | 2024 |
| Home&Bath Construction Ltd | Construction | 2026 |
| Homecom Ltd | Financial services | 2023 |
| Homedunes Ltd | Hospitality | 2021 |
| Homeguard Properties Limited | Real estate | 1998 |
| Homehapp Limited | Information & communication | 2015 |
| Homehurst Residents Co. Limited | Real estate | 1989 |
| Homelight Square Limited | Construction | 2025 |
| Homeopathic Podiatry Limited | Health & social care | 2008 |
| Homepoint (GB) Limited | Real estate | 1996 |
| Homes Sweet Homes Ltd | Real estate | 2022 |
| Homeserve 4 Care Limited | Administrative & support | 2017 |
| Homeside Construction Ltd | Construction | 2024 |
| Homestead Property Hub Ltd | Real estate | 2026 |
| Homestyle Repair Services Limited | Administrative & support | 2021 |
| Homstruct Ltd | Professional & scientific | 2015 |
| Honpat Property Solutions Ltd | Real estate | 2023 |
| Hooch Professionals Limited | Professional & scientific | 2010 |
| Hoopoe Advisors Limited | Professional & scientific | 2025 |
| Hooyoswithoutborders Ltd | Public administration | 2023 |
| Hope Developers (London) Ltd | Construction | 2021 |
| Hope Present Limited | Wholesale & retail | 2025 |
| Hope Residence Ltd | Health & social care | 2023 |
| Hope Rising Resources Ltd | Administrative & support | 2019 |
| Hopkele Productions Limited | Arts & recreation | 2007 |
| Hopkirk Jones Ltd | Administrative & support | 2010 |
| Horizon Corporate Limited | Extraterritorial | 2019 |
| Horizon Digital AC Limited | Professional & scientific | 2024 |
| Horizon Formwork Ltd | Construction | 2024 |
| Horizon Homes Limited | Real estate | 2000 |
| Horn Property Holdings Ltd | Administrative & support | 2014 |
| Hospitality Ordering Solutions Limited | Information & communication | 2026 |
| Hospitality Services London Ltd | Wholesale & retail | 2008 |
| Hot Food & Drink LA NEA Marin Ltd | Wholesale & retail | 2022 |
| Hot Hatches Ltd | Wholesale & retail | 2018 |
| Hot Slice Pizza Limited | Hospitality | 2026 |
| Hot Spot Online Ltd | Hospitality | 2025 |
| Hotel Sophia Ltd | Hospitality | 2004 |
| Hotmark Software Limited | Information & communication | 2014 |
| Houfu Ventures Limited | Financial services | 2002 |