| Honeypot Lane Properties Ltd | Real estate | 2018 |
| Hongdae Limited | Hospitality | 2022 |
| Honorin Limited | Construction | 2020 |
| Hook 58 Ltd | Hospitality | 2025 |
| Hook JMS Ltd | Manufacturing | 2023 |
| Hoopers of Harrow Limited | Transport & logistics | 2006 |
| Hoopoe Electric Ltd | Transport & logistics | 2015 |
| Hope and Family Limited | Other services | 2024 |
| Hope Services Limited | Health & social care | 2021 |
| Hopefield Ltd | Administrative & support | 2025 |
| Hopewake Limited | Real estate | 2024 |
| Horatio Jones Collective Ltd | Professional & scientific | 2026 |
| Horb Construction Ltd | Construction | 2018 |
| Horizon Construction Design and Building Ltd | Construction | 2025 |
| Horizon Developments (1994) Limited | Real estate | 1994 |
| Horizon Digital World Ltd | Information & communication | 2026 |
| Horizon Engineers & Contractors UK Ltd | Professional & scientific | 2025 |
| Horizon Estates Properties Ltd | Households | 2026 |
| Horizon Exim Ltd | Wholesale & retail | 2024 |
| Horizon Global Partners UK Limited | Professional & scientific | 2024 |
| Horizon Remit Ltd | Professional & scientific | 2018 |
| Horizon Residential Care Ltd | Health & social care | 2005 |
| Horizon Rfid Limited | Information & communication | 2025 |
| Horizon World Cargo Ltd | Transport & logistics | 2013 |
| Horizons Legal Services Ltd | Professional & scientific | 2023 |
| Hornbeam Transactions Limited | Administrative & support | 2026 |
| Hornblower Ltd | Financial services | 2024 |
| Hornblower Property Ltd | Construction | 2018 |
| Hornblower Yachting Ltd | Transport & logistics | 2018 |
| Hornsey Research Limited | Professional & scientific | 2013 |
| Horological Atelier Ltd | Information & communication | 2024 |
| Horsepower Leasing Ltd | Financial services | 2020 |
| Horton Kirby (Dartford) Management Company Limited | Households | 2007 |
| Horton Road (West Drayton) Management Company Limited | Households | 1988 |
| Hortus Healthcare Holdco Ltd | Real estate | 2023 |
| Hortus Healthcare Midco Ltd | Real estate | 2023 |
| Hospital Connections Ltd | Transport & logistics | 2020 |
| Hospital on Dmove Ltd | Health & social care | 2019 |
| Hospitality & Entertainment Ltd | Hospitality | 2025 |
| Hospitrade Ltd | Wholesale & retail | 2023 |
| Host NPZ Ltd | Real estate | 2017 |
| Hostlelo Ltd | Information & communication | 2024 |
| Hot Mops Ltd | Administrative & support | 2023 |
| Hot Rooster Ltd | Extraterritorial | 2020 |
| Hot Squid Limited | Information & communication | 2011 |
| Hot Yoga Brixton Limited | Arts & recreation | 2014 |
| Hot Yoga Essex Limited | Administrative & support | 2012 |
| Hot Yoga Unity Ltd | Administrative & support | 2024 |
| Hotel Colessio (Castle) Limited | Hospitality | 2018 |
| Hotel Colessio (Holdings) Limited | Hospitality | 2018 |
| Hotel Colessio (Property) Limited | Real estate | 2018 |
| Hotel Investment Advisors Limited | Professional & scientific | 2008 |
| Hotelfinder Limited | Administrative & support | 1999 |
| Hotels and More Limited | Real estate | 2021 |
| Hotels R US International Limited | Hospitality | 2023 |
| Hotline Tyres Ltd | Wholesale & retail | 2011 |
| Hotspot Food Limited | Hospitality | 2016 |
| Houghton Regis Limited | Professional & scientific | 2012 |
| Houghton Street Capital Limited | Administrative & support | 2014 |
| Houlbrook Ltd | Real estate | 2026 |
| Houndsditch 33 Limited | Arts & recreation | 2022 |
| Hounslow Estates Limited | Real estate | 1999 |
| Hour House Property Limited | Construction | 2018 |
| Hour House SPV1 Ltd | Construction | 2018 |
| House of Arissa Ltd | Wholesale & retail | 2026 |
| House of Artisans Ltd | Construction | 2026 |
| House of Cakes SB Ltd | Manufacturing | 2016 |
| House of Content Ltd | Information & communication | 2018 |
| House of Devi Ltd | Wholesale & retail | 2021 |
| House of Estree Ltd | Wholesale & retail | 2007 |
| House of Ikons Global Ltd | Information & communication | 2022 |
| House of Misogi Limited | Arts & recreation | 2024 |
| House of Samarra Ltd | Manufacturing | 2023 |
| House of Unique Parfum Limited | Manufacturing | 2018 |
| House of Waha Ltd | Hospitality | 2026 |
| House of Wealth Global Estate Ltd | Information & communication | 2026 |
| House of Wondr Ltd | Manufacturing | 2025 |
| House of Xpressions Limited | Wholesale & retail | 2012 |
| House of ZED Ltd | Information & communication | 2018 |
| Housefurbs Limited | Real estate | 2025 |
| Housenest Advertising Limited | Hospitality | 2025 |
| Houx Estates Limited | Real estate | 2019 |
| Houx Holdings Ltd | Extraterritorial | 2017 |
| Hove Holdings Limited | Real estate | 2026 |
| Hove Pizza Ltd | Hospitality | 2026 |
| HOW & Sons Limited | Administrative & support | 2012 |
| HOW Exchange Works Ltd | Information & communication | 2010 |
| Howard & Patrick Limited | | 1979 |
| Howard Decorators Ltd | Construction | 2018 |
| Howard Simons Limited | Construction | 2004 |
| Howdell Construction Limited | Real estate | 2000 |
| Howset Ltd | Real estate | 2019 |
| HOX Global Limited | Administrative & support | 2009 |
| HOX Homes Limited | Construction | 2021 |
| Hoxton Peak Limited | Administrative & support | 2013 |
| HP Collective Ltd | Wholesale & retail | 2026 |
| HP Transformation Management Consultancy Ltd | Professional & scientific | 2024 |
| Hpc.G Ltd | Construction | 2023 |
| HPC24CARE Ltd | Real estate | 2021 |
| HPG International Limited | Real estate | 2025 |