| Hoplite Hospitality Associates Limited | London | 2022 |
| Hopping MAD Limited | Leigh On Sea | 2003 |
| Hops and Barley (Group) Limited | Merseyside | 2014 |
| Hops and Barley (UK) Limited | Merseyside | 2014 |
| Hopsbox Limited | Chichester | 2014 |
| Hopson & Co Consulting Limited | Romford | 2022 |
| Hoptimist Brewery Ltd | Wantage | 2023 |
| Hopton Property Investment Holdings Limited | Cheltenham | 2021 |
| Hopwood Research and Evaluation Limited | Harrogate | 2017 |
| Horace Dale Ltd | Huntingdon | 2024 |
| Horama Ltd | Birmingham | 2025 |
| Horatio Debt Purchase Limited | Grantham | 2026 |
| Horatio Limited | | 1999 |
| Horder Limited | Barnet | 2009 |
| Hordex Limited | Bury | 2023 |
| Horeja & Nyama Ltd | Mildenhall | 2023 |
| Horekanny Trading Co., Ltd | Cambridge | 2025 |
| Horgan Estates Ltd | Basildon | 2019 |
| Horizon 5 Coaching Ltd | London | 2020 |
| Horizon Bridge Consulting Services Ltd | Manchester | 2026 |
| Horizon BSF Limited | Huddersfield | 2009 |
| Horizon Capital (Holdings) Limited | London | 2006 |
| Horizon Capital Memberco Limited | London | 2021 |
| Horizon Coast Trading Co., Limited | London | 2024 |
| Horizon Corporate Limited | Edgware | 2019 |
| Horizon Engineering Limited | Eynsham | 2014 |
| Horizon FD Limited | Bury St. Edmunds | 2017 |
| Horizon Flooring Systems Limited | Darwen | 2002 |
| Horizon Foam Limited | Darwen | 2002 |
| Horizon for General Trading Limited | Manchester | 2026 |
| Horizon for International Services Limited | Manchester | 2026 |
| Horizon for International Trading & Services Limited | Manchester | 2026 |
| Horizon for International Trading Limited | Manchester | 2026 |
| Horizon for Investment & Trading Ltd | Manchester | 2026 |
| Horizon for Investment Limited | Manchester | 2026 |
| Horizon for Trading & Services Limited | Manchester | 2026 |
| Horizon for Trading Limited | Manchester | 2026 |
| Horizon Formwork Co., Ltd. | London | 2014 |
| Horizon Global Business Ltd | Beckenham | 2016 |
| Horizon Heat Properties Ltd | London | 2026 |
| Horizon Helicopter Services Ltd | Dover | 2024 |
| Horizon Import & Export Co., Ltd | Beckenham | 2017 |
| Horizon Outsourcing Limited | Berkhamsted | 2018 |
| Horizon Payroll Solutions Limited | Kings Langley | 2021 |
| Horizon Platform Sales Limited | Normanton | 2010 |
| Horizon Publishing (South) Ltd | Verwood | 2017 |
| Horizon RCS Europe Limited | Kings Langley | 2007 |
| Horizon Signs Limited | Huddersfield | 2012 |
| Horizon Solutions (KT) Limited | Northolt | 2014 |
| Horizon Therapy Spaces Ltd | London | 2024 |
| Horizon Tool Solutions Limited | Wareham | 2017 |
| Horizon Trade Solutions Ltd | Cambridge | 2025 |
| Horizon Wealth Asset Management Co., Ltd. | Beckenham | 2023 |
| Horizon-Mena Limited | West Drayton | 2013 |
| Horizonforge Group Ltd | South Hykeham | 2026 |
| Horizonwave Media Ltd | Doncaster | 2026 |
| Horley Green Court Management Company (Halifax) Limited | Elland | 2000 |
| Hormount Limited | Accrington | 2018 |
| Hornbill Service Management Applications Limited | London | 2010 |
| Hornbill Service Management Limited | London | 1995 |
| Hornbill Systems Limited | London | 2010 |
| Hornby Dublo 2000 Limited | Swindon | 1998 |
| Horne Brothers Funeral Directors Limited | Matlock | 2024 |
| Horne House (Management) Limited | London | 1988 |
| Hornet Vehicles Limited | Bournemouth | 2015 |
| Horngry Apparel & Accessories Limited | London | 2018 |
| Horngry Ltd | London | 2022 |
| Horns and Halo Ltd | Croydon | 2020 |
| Horns Lodge 1966 Limited | Tonbridge | 2014 |
| Horns Lodge 1968 Limited | Tonbridge | 2014 |
| Hornsby Close Shipston Management Company Limited | Great Alne | 2015 |
| Hornsea Caravan Park Limited | Bridlington | 2007 |
| Hornsey Town Hall Trust | London | 2007 |
| Hornton Street Garden Company Limited | London | 1978 |
| Horodenski Ltd | London | 2014 |
| Horrocks BUS Limited | Lydbury North | 2008 |
| Horror Limited | London | 2015 |
| Horror London Limited | London | 2015 |
| Horse & Jockey Gastro Limited | Runcorn | 2017 |
| Horse Drawn Funerals Ltd | Halstead | 2012 |
| Horse Guard Safety Ltd | Rugby | 2023 |
| Horse Mischief Limited | Whitchurch | 2017 |
| Horse Power Holding Ltd | London | 2021 |
| Horse Racing Tips Ltd | London | 2017 |
| Horsedonkey | London | 2015 |
| Horsedream UK Limited | Uckfield | 2004 |
| Horseracing Lottery Limited | Gt Leighs Chelmsford | 2001 |
| Horseshoe Drive (Macclesfield) Management Company Ltd | Macclesfield | 2008 |
| Horseshoe Garage (St.Helens) Limited | Parr | 2005 |
| Horseshoe Homes Ltd | Lymington | 2010 |
| Horseshoe Hotels Limited | Glasgow | 1998 |
| Horseware Products (UK) Limited | London | 2021 |
| Horsfall & Bickham Limited | Mitcham | 1969 |
| Horsfall Card Clothing Limited | Mitcham | 1915 |
| Horsham Creative Ltd | Horsham | 2023 |
| Horsham Motor Services Limited | Horsham | 2024 |
| Horsham Windows and Doors Ltd | Horsham | 2010 |
| Horsleydown Mansions Management Limited | Angmering | 1998 |
| Horsleys Commercial Contracts Ltd | Stafford | 2014 |
| Horslow Street 1968 Limited | Sandy | 2015 |