| Hewitt's Premier Inns Ltd | Arts & recreation | 2019 |
| Hexagon Group Limited | Financial services | 2016 |
| Hexagon Partners Ltd | Real estate | 2024 |
| Hexel Holdings Limited | Financial services | 2017 |
| HEY Buck Limited | Arts & recreation | 2018 |
| HEY Crazy Goat Ltd | Extraterritorial | 2022 |
| Heyes Project Services Limited | Construction | 2016 |
| Heysome Properties Ltd | Real estate | 2021 |
| Heythorp Limited | Information & communication | 2005 |
| Heywood Financial Solutions Ltd | Financial services | 2013 |
| HG Heating Services Ltd | Construction | 2010 |
| Hgconsultancy Ltd | Information & communication | 2007 |
| HGE Creative Limited | Information & communication | 2022 |
| HGV Transport Solutions Ltd | Transport & logistics | 2024 |
| HH Fishery Limited | Agriculture & fishing | 2025 |
| HH Pharma Consultancy Ltd | Wholesale & retail | 2022 |
| HHA Education Limited | Education | 2018 |
| HHA MBE Ltd | Real estate | 2021 |
| HHK Software Solutions Limited | Information & communication | 2012 |
| HI Q Fabrications Limited | Manufacturing | 2002 |
| Hi-Pix Photography Limited | Professional & scientific | 2004 |
| Hi-Spec Cladding and Roofing Limited | Construction | 2000 |
| Hibbah Khaleel Limited | Wholesale & retail | 2024 |
| Hibbert Advisory Ltd | Administrative & support | 2025 |
| Hibiscus Home Care Limited | Health & social care | 2024 |
| Hickman's Car Spares Limited | Wholesale & retail | 2018 |
| Hicks Technology Ltd | Professional & scientific | 2025 |
| Hicksmith Ltd | Real estate | 2026 |
| Hico Heating Ltd | Construction | 2021 |
| Hidden GEM Homes Ltd | Hospitality | 2025 |
| Hiden Analytical Limited | Manufacturing | 1981 |
| Hiden Instruments Limited | Manufacturing | 2011 |
| Hiden Isochema Limited | Manufacturing | 1993 |
| Hideout Tiki Ltd | Hospitality | 2020 |
| Higgins Electrical (NW) Ltd | Construction | 2023 |
| Higgins Solutions Ltd | Administrative & support | 2011 |
| High 5 Restaurant Ltd | Hospitality | 2026 |
| High Grade Access Ltd | Construction | 2024 |
| High Hill View Residents Management Company Ltd | Households | 2024 |
| High Lane Properties Limited | Real estate | 1995 |
| High ROW Storage Limited | Transport & logistics | 1976 |
| High Spirits Apparel Ltd | Wholesale & retail | 2025 |
| High Street Bar 83 Ltd | Hospitality | 2026 |
| High Street Jobs Ltd. | Administrative & support | 2005 |
| High Voltage 1 Limited | Professional & scientific | 2017 |
| Higham Building Maintenance Ltd | Construction | 2024 |
| Higham Media Limited | Information & communication | 2021 |
| Highbridge (Eurocentral) Contractors Limited | Extraterritorial | 2003 |
| Highbridge (Eurocentral) Industries Limited | Professional & scientific | 1995 |
| Highbridge (KD) Developments Limited | Construction | 2005 |
| Highbridge (KD) DPA Limited | Real estate | 2008 |
| Highbridge (Ockendon) Limited | Professional & scientific | 2004 |
| Highbridge (Sherwood) Developments Limited | Extraterritorial | 1996 |
| Highbridge (Wallsend) NO. 1 Limited | Extraterritorial | 2002 |
| Highbridge (Wallsend) NO. 2 Limited | Extraterritorial | 2002 |
| Highbridge (Westmoor) Securities Limited | Extraterritorial | 2003 |
| Highbridge Business Park Limited | Construction | 1998 |
| Highbridge Business Park North Limited | Construction | 2020 |
| Highbridge Cobalt Limited | Construction | 2010 |
| Highbridge Hadrian (South) Limited | Professional & scientific | 1998 |
| Highbridge Management Services Limited | Professional & scientific | 1989 |
| Highbridge North Tyneside Contractor One Limited | Construction | 2005 |
| Highbridge Properties Limited | Construction | 1988 |
| Highbridge Sherwood (North) Limited | Professional & scientific | 1998 |
| Highbridge Washington Limited | Construction | 2002 |
| Highbury Games Ltd | Information & communication | 2023 |
| Higher Folds Health Limited | Real estate | 2020 |
| Highfields Management Company Limited | Administrative & support | 1990 |
| Highgate Civils Limited | Administrative & support | 2016 |
| Highgrove (Alderley Edge) Freehold Limited | Households | 2019 |
| Highland House Consulting Ltd | Other services | 2024 |
| Highlands Consulting Ltd | Professional & scientific | 2019 |
| Highline Media Ltd | Administrative & support | 2025 |
| Highrope Limited | Construction | 2023 |
| Highvolts Consulting Limited | Administrative & support | 2010 |
| Highway Design & Construction Supervision Services Limited | Administrative & support | 2015 |
| Highways DP Ltd | Administrative & support | 2020 |
| Highways Envirotec Solutions (UK) Ltd | Financial services | 2017 |
| Hiley Financial Planning Ltd | Financial services | 2026 |
| Hill Drummond Eica Ltd | Professional & scientific | 2021 |
| Hill Farm Dutton Ltd | Hospitality | 2026 |
| Hill Management Consultancy Limited | Professional & scientific | 2007 |
| Hill Top Farm (Croft) Ltd | Real estate | 2009 |
| Hill Warren Consulting Limited | Professional & scientific | 2014 |
| HILL60 Surveying Limited | Administrative & support | 2025 |
| Hillcliffe Ltd | Real estate | 1987 |
| Hillcrest Project Management Limited | Professional & scientific | 2023 |
| Hillend Properties NW Limited | Real estate | 2026 |
| Hillside Appleton Limited | Financial services | 1999 |
| Hillside Assets Limited | Financial services | 2017 |
| Hillside Court (Administration) Limited | Households | 1990 |
| Hillside Designs Limited | Professional & scientific | 2017 |
| Hillside Road Property Limited | Extraterritorial | 1999 |
| Hilltop Products (Insulation Sleevings) Limited | Manufacturing | 2002 |
| Hilltop Products Holdings Ltd | Financial services | 2025 |
| Hilltops Consulting Limited | Information & communication | 2016 |
| Hillview Properties (NW) Limited | Real estate | 2019 |
| Hillyard Limited | Health & social care | 2014 |
| Hilton Carpets & Flooring Limited | Wholesale & retail | 2023 |
| Hilton Properties (Northwest) Ltd | Real estate | 2021 |