| Homeservation Limited | Real estate | 2025 |
| Homewise Mart Limited | Wholesale & retail | 2025 |
| Homonym Production Ltd | Information & communication | 2024 |
| Honest Crumb Limited | Hospitality | 2026 |
| Honest Fine Food Limited | Wholesale & retail | 2016 |
| Honey Badger Science IT Ltd | Financial services | 2024 |
| Honey BAE Aesthetics Ltd | Other services | 2024 |
| Honeybee & Lavender Ltd | Real estate | 2023 |
| Honeycomb Catering Ltd | Hospitality | 2023 |
| Honeycomb Houses Ltd | Real estate | 2021 |
| Honeycombe Heath Management Company Limited | Households | 2004 |
| Honeymoon Croydon Limited | Wholesale & retail | 2025 |
| Honeys Food & Wine Ltd | Wholesale & retail | 2024 |
| Honeysett Consultancy Services Ltd | Professional & scientific | 2020 |
| Hong Kong Takeaway Ltd | Hospitality | 2017 |
| Hong Ying Ltd | Professional & scientific | 2025 |
| Honor Consulting UK Limited | Information & communication | 2010 |
| Hookwood Farm Limited | Administrative & support | 2006 |
| Hooper Brown Construction Limited | Construction | 2011 |
| Hoopers' Toolkit Ltd | Education | 2024 |
| Hoopoe Films Limited | Information & communication | 2014 |
| Hope Express Ltd | Wholesale & retail | 2024 |
| Hope Farm Healthcare LLP | | 2011 |
| Hope Management Company Limited | Real estate | 1999 |
| Hope Music Academy Limited | Education | 2017 |
| Hope of Glory Daycare Ltd | Health & social care | 2021 |
| Hope Park Mews (Macclesfield) Limited | Households | 2017 |
| Hope Point Support Limited | Health & social care | 2025 |
| Hope Resources Management Ltd | Administrative & support | 2022 |
| Hope to Stand UP Ltd | Health & social care | 2020 |
| Hope Yltt Property Investment Ltd | Real estate | 2024 |
| HOPE4DESPAIR Paralegal & Business Supportservices Limited | Professional & scientific | 2022 |
| Horeca Design Ltd | Manufacturing | 2016 |
| Horizon 117 Ltd | Real estate | 2017 |
| Horizon Intelligence Systems Ltd | Information & communication | 2026 |
| Horizon IT Security Limited | Information & communication | 2019 |
| Horizon Pathway Supported Living Ltd | Hospitality | 2022 |
| Horizons Consultancy Ltd | Health & social care | 2019 |
| Horns and Halo Ltd | Extraterritorial | 2020 |
| Horse and Jockey Mews (West Pinchbeck) Management Company Limited | Households | 2005 |
| Horse Shoe Security Limited | Construction | 2013 |
| Horseshoe Wharf Management Limited | Households | 1999 |
| Horsetail Ltd | Wholesale & retail | 2019 |
| Horsham Road Management Company Limited | Households | 2004 |
| Horstmann Villas Management Company Ltd | Households | 2009 |
| Hortensia Limited | Real estate | 2023 |
| Horton Hospital (Livingstone Park) Management Limited | Households | 2004 |
| Hospitality Trademarks (UK) Ltd | Hospitality | 2018 |
| Hot Data Systems Ltd | Information & communication | 2015 |
| Hot N High Ltd | Wholesale & retail | 2020 |
| Hot Pretzels Ltd | Wholesale & retail | 2019 |
| Hot Spot Xpress Ltd | Hospitality | 2023 |
| Hotfood Hornsey Limited | Hospitality | 2023 |
| Hothi Contractors Limited | Construction | 2025 |
| Hotrock Food Ltd | Hospitality | 2026 |
| Houghtons Holdings Limited | Financial services | 2017 |
| Hound Labs Ltd | Information & communication | 2026 |
| House & Keys Ltd | Real estate | 2025 |
| House of Comfort Ministries | Other services | 2006 |
| House of Fatania Ltd | Wholesale & retail | 2026 |
| House of Gold London Ltd | Wholesale & retail | 2019 |
| House of Grace Ministries (Divine Grace Centre) Limited | Education | 2025 |
| House of Judah (Praise) Ministries International | Other services | 2016 |
| House of Learning Ltd | Education | 2019 |
| House of ORI Ltd | Wholesale & retail | 2022 |
| House of Prayer (ILE Adura) Ministry Ltd | Other services | 2015 |
| House of Prayers for ALL Nations CIC | Other services | 2024 |
| House of Rosemarino Ltd | Hospitality | 2021 |
| House of Soap Ltd | Manufacturing | 2021 |
| House of Tatirè Ltd | Manufacturing | 2025 |
| House of Tropic Limited | Financial services | 2023 |
| House of Yamoah Ltd. | Manufacturing | 2019 |
| House Refurb Ltd | Construction | 2013 |
| Houseme Ltd | Real estate | 2019 |
| Housetown Limited | Real estate | 2000 |
| Hovarda Holdings Limited | Financial services | 2024 |
| Hovis Prod. Ltd | Information & communication | 2025 |
| HOW to BE a Student Nurse Ltd | Education | 2021 |
| Howard Care Solutions Ltd | Health & social care | 2020 |
| Howbury Park Management Company Limited | Households | 1995 |
| Howell Doyle Contracts Limited | Construction | 2003 |
| Howell Doyle Properties Ltd | Real estate | 2016 |
| Howie Buildings Ltd | Real estate | 2025 |
| Howie's Incorporated Ltd | Construction | 2014 |
| HP Drylining Ltd | Other services | 2019 |
| HP Grange Enterprises Limited | Wholesale & retail | 2019 |
| HPA Investment Property Ltd | Real estate | 2026 |
| HPA Properties Investment Ltd | Real estate | 2002 |
| Hpar Centre Point Clinic Ltd | Health & social care | 2014 |
| HPG Management Ltd | Households | 2014 |
| HPS Data Analytics Ltd | Information & communication | 2016 |
| Hpservices Ltd | Professional & scientific | 2012 |
| HQ Homes Limited | Real estate | 2019 |
| HQ Residence Management Company Limited | Real estate | 2006 |
| HR and J Property Limited | Real estate | 2024 |
| HR Minus Karen Limited | Administrative & support | 2021 |
| Hrieya Limited | Wholesale & retail | 2018 |
| Hrisha Limited | Health & social care | 2019 |
| HRJ Property Investment Ltd | Real estate | 2023 |
| HS Best Ltd | Construction | 2025 |