| Hometown Nails Ltd | Other services | 2025 |
| Honace Developments (Brightlingsea) Limited | Professional & scientific | 2015 |
| Honace Developments Limited | Professional & scientific | 2015 |
| Honace Limited | Professional & scientific | 2014 |
| Honey BEE N Nest Consult Ltd | Other services | 2022 |
| Honey&Bamse Limited | Transport & logistics | 2025 |
| Hooked by HM Ltd | Wholesale & retail | 2024 |
| Hooper & Co (Financial Management) Limited | Professional & scientific | 2005 |
| Hooper Installations Ltd | Construction | 2015 |
| Hoopes Ltd | Wholesale & retail | 2021 |
| Hope and Faith Victory Ltd | Administrative & support | 2018 |
| Hope Assist Limited | Real estate | 2023 |
| Hope Cleaning Ltd | Administrative & support | 2025 |
| Hope Haven CIC | Education | 2024 |
| Hope Learning Community | Education | 2016 |
| Hophouse Partnership Limited | Professional & scientific | 2009 |
| Hopkins & SON (Electrical) Limited | Construction | 1990 |
| Horizon Construction (East Anglia) Limited | Construction | 1999 |
| Horizon Construction (London) Ltd | Construction | 2016 |
| Horizon Construction Group Limited | Financial services | 2025 |
| Horizon Self Drive Ltd | Administrative & support | 2022 |
| Horizons Residents Company Limited | Households | 2004 |
| Horkesley Hamlet Management Company Limited | Households | 2018 |
| Horkesley Heath Ltd | Construction | 2020 |
| Horkesley Structural Consulting LLP | | 2026 |
| Hornestreet Limited | Arts & recreation | 2019 |
| Horsebox Sales (UK) Limited | Wholesale & retail | 2020 |
| Horsell Lodge Limited | Health & social care | 1999 |
| Horsley House (Felixstowe) Limited | Hospitality | 1987 |
| Horton Homes 3 Ltd | Construction | 2019 |
| Horton Hospitality Limited | Hospitality | 2026 |
| Hosequip Ltd | Manufacturing | 2009 |
| Hosparts Limited | Extraterritorial | 2015 |
| Hospitality Management International Ltd | Professional & scientific | 2001 |
| Hospitality Partners Limited | Professional & scientific | 2025 |
| Hosplant Sales Limited | Other services | 2004 |
| Hotel Systems Online.Com Limited | | 2000 |
| Hotel York Limited(The) | Hospitality | 1906 |
| Hotlizard Limited | Information & communication | 1999 |
| Hotpod Yoga Colchester Ltd | Arts & recreation | 2023 |
| Houchins Enterprises LLP | | 2011 |
| Houndabout Limited | Professional & scientific | 2020 |
| Hounds & Co. Dog Behaviour Training Ltd | Other services | 2020 |
| Housden Music Ltd | Arts & recreation | 2020 |
| House & Homes Trading Ltd | Manufacturing | 2015 |
| House and Home Renovations Ltd | Construction | 2017 |
| House of Aemlie Limited | Manufacturing | 2024 |
| House of Carney Ltd | Arts & recreation | 2025 |
| House of Falcon Ltd | Manufacturing | 2025 |
| House of Gulliver Limited | Arts & recreation | 1998 |
| House of Hyggeness Limited | Wholesale & retail | 2021 |
| House of Joy Ltd | Wholesale & retail | 2025 |
| House of Niram Ltd | Wholesale & retail | 2025 |
| House of Panda Ltd | Other services | 2020 |
| House of Peluca Limited | Wholesale & retail | 2020 |
| House Rent Ltd | Real estate | 2024 |
| Houser & Marsh Ltd | Professional & scientific | 2019 |
| Housevale Ltd | Construction | 2026 |
| Housing Communities (Old Dagenham) Limited | Construction | 2020 |
| Housing Communities (Winchester) Limited | Construction | 2020 |
| Housingcare Limited | Real estate | 2024 |
| Hove&Family Ltd | Real estate | 2022 |
| Hoverclub of Great Britain Limited (the) | Arts & recreation | 1967 |
| HOW 2 Entertainment Ltd | Administrative & support | 2012 |
| HOW Groundworks Ltd | Construction | 2026 |
| Howard Brothers Construction Limited | Construction | 2015 |
| Howard Franchise Ltd | Education | 2023 |
| Howard James Construction Consultants Ltd | Professional & scientific | 2019 |
| Howard Scofield I.F.A Limited | Professional & scientific | 2000 |
| Howards (Estate Agents) Limited | Real estate | 1994 |
| Howdale Magna Limited | Professional & scientific | 1992 |
| Howe Homes (East Anglia) Ltd | Construction | 2022 |
| Howell & Lone Limited | Manufacturing | 2018 |
| Howell Edwards Limited | Professional & scientific | 2014 |
| Howerty Construction Ltd | Construction | 2026 |
| Howlett & Sons Ltd | Manufacturing | 2025 |
| Howlett Accounts Limited | Professional & scientific | 2008 |
| Howzit Mortgages Limited | Financial services | 2023 |
| Hoysteg Ltd | Professional & scientific | 2017 |
| HP Projects Essex Ltd | Construction | 2024 |
| HPH Sailplanes UK Limited | Administrative & support | 2018 |
| HR Solutions (Anglia) Ltd | Administrative & support | 2015 |
| HRH Services Ltd | Wholesale & retail | 2022 |
| HRM People Consultancy Ltd | Administrative & support | 2022 |
| Hrprandhrpr Limited | Professional & scientific | 2015 |
| HS Legal Solicitors Ltd | Professional & scientific | 2015 |
| HS Property Improvements Limited | Construction | 2024 |
| Hs.Connect Ltd | Energy | 2026 |
| HT Technology Limited | Information & communication | 2010 |
| Ht-Ch Holdings Ltd | Financial services | 2021 |
| Htec Holdings Ltd | Wholesale & retail | 2021 |
| Huahua Limited | Wholesale & retail | 2025 |
| Huang Gong Limited | Hospitality | 2018 |
| Hubb Group Maintenance Ltd | Construction | 2025 |
| Hubb Group Property Care Ltd | Construction | 2026 |
| Huberts Holdings North Ltd | Real estate | 2026 |
| Huberts Holdings South Ltd | Real estate | 2026 |
| Hubflow Marketing Ltd | Professional & scientific | 2024 |
| Hubki Marketing Solutions Ltd | Professional & scientific | 2023 |
| Hubland Properties Ltd | Real estate | 2023 |