| Hire and Supplies Holdings Limited | Stone | 2014 |
| Hire Nationwide Limited | Birmingham | 2011 |
| Hire One (Radlett) Limited | Aylesbury | 1989 |
| Hire Plant Ltd. | East Grinstead | 2011 |
| Hire Requirements Limited | Warrington | 2023 |
| Hire Vehicles Limited | Exeter | 1997 |
| Hired OUT Ltd | Manchester | 2023 |
| Hirefleet Limited | Birmingham | 2009 |
| Hirejobsolution Ltd | Norwich | 2018 |
| Hirem Abiff Limited | Market Rasen | 2022 |
| Hiring Squad Ltd | Manchester | 2023 |
| Hiroan Shipping Co., Limited | Cambridge | 2019 |
| Hiroi Shipping Co., Limited | Cambridge | 2016 |
| Hirojun Shipping Co., Limited | Cambridge | 2015 |
| Hiromi Shipping Co., Limited | Cambridge | 2021 |
| Hirondelle (UK) Ltd | Manchester | 2008 |
| Hiroyou Shipping Co., Limited | Cambridge | 2019 |
| Hirst Sandra Ltd | Manchester | 2024 |
| HIS Future Minds Ltd | Manchester | 2023 |
| HIS Lifetime Ltd | Manchester | 2022 |
| HIS Systems Limited | Solihull | 1996 |
| Hisaily Ltd | Kington | 2024 |
| Hiscox Group Limited | Harrogate | 2025 |
| Hiscox Securities Limited | Harrogate | 2025 |
| Hisight Technology Limited | London | 2010 |
| Hisn Engineering Consulting Company Ltd | Harrogate | 2024 |
| Hispeed Tyres Limited | Wrexham | 1985 |
| Histed Engineering Ltd | Boston | 2023 |
| Histeel Limited | Kington | 2018 |
| Historic Ecosse Limited | Loanhead | 2005 |
| Historic Flying Limited | Cambridge | 2021 |
| Historic Homes Limited | Surrey | 2001 |
| Historic Racing and Sports Car Club Limited | Towcester | 2002 |
| Historic Racing Car Club Limited | Towcester | 2002 |
| Historic Sports and Racing Car Club Limited | Towcester | 2002 |
| Historical Capital Limited | Wadhurst | 2016 |
| Historical Medallions Ltd | London | 2021 |
| Historical Roofing Services Ltd | Stamford | 2023 |
| Historie Formedling OCH Guidning Invest Limited | London | 2023 |
| Historie Formedling OCH Guidning Limited | London | 2023 |
| Historika Klassik Ltd | Ipswich | 2014 |
| History Heroes Limited | Alresford | 2010 |
| History Walks Ltd | Ashford | 2012 |
| HIT Entertainment Finance Unlimited | Slough | 2001 |
| HIT Technology Ltd | Leicester | 2022 |
| HIT Ventures 5 Limited | Slough | 2002 |
| Hitch Heaven Weddings Limited | Hartlepool | 2011 |
| Hitchen Hatch Mews Management Company Limited | Angmering | 1980 |
| Hitchiker Global Ltd | Grantham | 2004 |
| Hitchin Mini and Midi Skip Hire Limited | Graveley | 2012 |
| Hitchin Recycling Limited | Graveley | 2012 |
| Hitchin Skip & Grab Hire Limited | Graveley | 2008 |
| Hitchin Storage Centre Limited | Hitchin | 2023 |
| Hitching Boxing Ltd | Petersfield | 2024 |
| Hitech Equipment Limited | Renfrewshire | 1988 |
| Hitech Industry Co., Ltd | Beckenham | 2023 |
| Hitech International Ltd | Newcastle | 2021 |
| Hitech Tronics Limited | London | 2021 |
| Hitechh Ltd | Manchester | 2022 |
| Hither Green Trading Estate Limited | Kingswinford | 2009 |
| Hithermoor Soil Treatments Limited | Canterbury | 1965 |
| Hits-Uk Consultancy Limited | Plymouth | 2010 |
| Hitte Ltd | London | 2025 |
| Hitting Targets Blackheath Limited | London | 2019 |
| Hittite Limited | Barnet | 2021 |
| Hitwave Limited | London | 2007 |
| Hiva Food Limited | London | 2018 |
| Hive Construction (Southern) Ltd | Wimborne | 2024 |
| Hixmas Co., Ltd | London | 2012 |
| Hiya Burger Invest Ltd | Dover | 2023 |
| Hiya Burger Ltd | Dover | 2023 |
| Hiya Limited | Crediton | 2011 |
| Hiyatree Limited | Tenby | 2023 |
| Hiyou Marine Machinery Limited | Beckenham | 2021 |
| Hizan Trading Co., Ltd | Weston Road,Stafford, | 2023 |
| HJ (Sheff) Limited | Sheffield | 2025 |
| HJA Metals Ltd | Worcester | 2019 |
| HJB 1 Limited | Clevedon | 2016 |
| Hjebo Allservice Invest Limited | London | 2022 |
| Hjelmtveit Investment Limited | London | 2020 |
| Hjelmtveit Limited | London | 2020 |
| Hjertemedisin Limited | London | 2010 |
| HJF2 Invest Ltd | Alton | 2004 |
| HJG Media Limited | Preston | 2013 |
| HJJ Holdings Ltd | Bromley | 2016 |
| HJM Management Services Ltd | Coventry | 2020 |
| Hjmd Limited | Carlisle | 2019 |
| Hjordis EL Limited | London | 2021 |
| HJP Konsult & Massage Limited | London | 2026 |
| HJS Company Secretarial Services Limited | Southampton | 2006 |
| HJS Marketing Consultants Ltd | Wolverhampton | 2012 |
| HJW Groundworks UK Ltd | Wisbech | 2025 |
| HK Blue Ocean Trade Limited | London | 2015 |
| HK Grand Canyon Company Ltd. | London | 2016 |
| HK Jingke Investment Trading Co., Ltd | Cambridge | 2025 |
| HK L&A Trading Co., Limited | Beckenham | 2020 |
| HK Shine Industrial Ltd. | London | 2017 |
| HK Technology Holdings Ltd | London | 2019 |
| HK Yiqiao Trade Co., Limited | Beckenham | 2018 |
| HK Yuanjin Imp&Exp Co., Limited | Stafford | 2014 |