| Hoot With ME Community Interest Company | Education | 2017 |
| Hopgoods (Drapers) Limited | Real estate | 1973 |
| Hopkins Ecology Ltd | Professional & scientific | 2016 |
| Hopkinslefevre Ltd | Other services | 2023 |
| Hopsack Road (Leasehold) Management Company Limited | Real estate | 2018 |
| Hopwood Holdings (East) Ltd | Financial services | 2025 |
| Hopwood Property (East) Ltd | Real estate | 2025 |
| Horace Blue Ltd | Professional & scientific | 2025 |
| Horatii Consulting Limited | Professional & scientific | 2018 |
| Horatio Risk Consulting LLP | | 2016 |
| Horatio Terrace Limited | Households | 2017 |
| Horgan Housing Ltd | Real estate | 2016 |
| Horizon Ceremonies Limited | Other services | 2015 |
| Horizon Cremation (Banstead) Limited | Other services | 2019 |
| Horizon Cremation (Hooton) Limited | Other services | 2019 |
| Horizon Cremation (Newton Abbot) Limited | Other services | 2025 |
| Horizon Cremation (Oulton) Limited | Other services | 2024 |
| Horizon Cremation (Oxted) Limited | Other services | 2019 |
| Horizon Cremation Limited | Administrative & support | 2020 |
| Horizon Deals Ltd | Wholesale & retail | 2023 |
| Horizon GOS Ltd | Hospitality | 2023 |
| Horizon Healthcare Solutions Limited | Health & social care | 2023 |
| Horizon Joinery (East Anglia) Limited | Manufacturing | 2002 |
| Horizon Payroll Services Limited | Administrative & support | 2007 |
| Horizon Properties Ltd | Real estate | 2025 |
| Hornbeam Accountancy Services Ltd | Professional & scientific | 2001 |
| Hornby Enterprises Limited | Agriculture & fishing | 2016 |
| Horning Pleasurecraft Limited | Administrative & support | 2020 |
| Horse Barns Amenity Land Company Limited | Households | 2004 |
| Horseshoe Road Limited | Information & communication | 2015 |
| Horsey GAP Ltd | Arts & recreation | 2020 |
| Horseymoore Investments Limited | Financial services | 2025 |
| Horsford Car Wash Ltd | Other services | 2024 |
| Horsford Chef Limited | Hospitality | 2009 |
| Horsford Development Company Limited | Construction | 1963 |
| Horsford Firewood Company Ltd | Manufacturing | 2025 |
| Horsford Fish Bar Limited | Hospitality | 2006 |
| Horsford Kebab Limited | Hospitality | 2019 |
| Horsford Social Club C.I.C. | Hospitality | 2024 |
| Horsham Properties Limited | Real estate | 2012 |
| Horstead Garage (Norfolk) Limited | Wholesale & retail | 2006 |
| Hort-Francis Consultancy Ltd | Information & communication | 2026 |
| Hortconsult Ltd | Administrative & support | 2010 |
| Hosanna Fish Ltd | Agriculture & fishing | 2020 |
| Host Design Studio Ltd | Information & communication | 2015 |
| Hostess Caterers Limited | Hospitality | 1987 |
| Hosting.Com UK Services Ltd | Information & communication | 2019 |
| Hostweekly Ltd | Professional & scientific | 2026 |
| Hot & Sour Pizza Ltd | Hospitality | 2016 |
| Hot & Spicy (Spalding) Ltd | Hospitality | 2019 |
| Hot Comps Holdings Limited | Wholesale & retail | 2023 |
| Hot Comps Ltd | Wholesale & retail | 2018 |
| Hot Popcorn Holdings Ltd | Financial services | 2023 |
| Hot Star Honey Ltd | Manufacturing | 2017 |
| Hot to Trot School of Equitation Ltd | Arts & recreation | 2014 |
| Hot Yoga Berkshire Ltd | Arts & recreation | 2008 |
| Hota Events Ltd | Other services | 2025 |
| Hotcakes Limited | Wholesale & retail | 1985 |
| Hotel Catering Supplies Ltd | Wholesale & retail | 2016 |
| Hotel Leisure Breaks Ltd | Hospitality | 2018 |
| Hothouse Therapeutics Limited | Professional & scientific | 2020 |
| Hotpod Yoga Norwich Limited | Arts & recreation | 2021 |
| Hotworx Waterproofing Limited | Construction | 2025 |
| Houchell Limited | Construction | 2005 |
| Houdini Marine Windows Limited | Extraterritorial | 2023 |
| Hound Envelopes Limited | Wholesale & retail | 2003 |
| Hound&Co Limited | Other services | 2022 |
| Hounslow Glass Company Limited | Construction | 1984 |
| House 2 Home Developments Limited | Real estate | 2003 |
| House Catering Ltd | Hospitality | 2022 |
| House Heritage Ltd | Real estate | 2024 |
| House Iron Ltd | Real estate | 2017 |
| House of Audacity Ltd | Administrative & support | 2022 |
| House of G&G Ltd | Manufacturing | 2023 |
| House of Moira Ltd | Real estate | 2021 |
| House Select Ltd | Real estate | 2022 |
| Houseago Properties Ltd | Real estate | 2021 |
| Housecheckr Services Limited | Information & communication | 2018 |
| Househive Ltd | Wholesale & retail | 2023 |
| Houses of Nile Limited | Real estate | 2022 |
| Housing Expectations Ltd | Real estate | 2005 |
| Housing Ladder (Breckland) Ltd | Construction | 2017 |
| Hout Property Limited | Real estate | 2021 |
| Hover Hawk Property Ltd | Real estate | 2024 |
| Hoveton Car Boot Sales Ltd | Wholesale & retail | 2019 |
| HOW 2 Thrive Ltd | Health & social care | 2023 |
| HOW NOW Films Limited | Other services | 2011 |
| HOW Solutions Ltd | Real estate | 2025 |
| Howard Edwards Limited | Real estate | 2001 |
| Howard Property Solutions Group Ltd | Hospitality | 2025 |
| Howard-Howells Holdings Ltd | Financial services | 2025 |
| Howards Housing Developments Ltd | Real estate | 2025 |
| Howcani Ltd | Professional & scientific | 2015 |
| Howdy Hounds Limited | Administrative & support | 2024 |
| Howe (Investments) Ltd | Extraterritorial | 2015 |
| Howe and Boosey Architectural Services Ltd | Professional & scientific | 2021 |
| Howe Holdings Ltd | Real estate | 2015 |
| Howe Locums Limited | Professional & scientific | 2022 |
| Howe to Train Ltd | Education | 2014 |
| Howe's Carpentry and Kitchens Limited | Construction | 2023 |