| Highspeed Courier Services Limited | Transport & logistics | 2019 |
| Highspen 2025 Limited | Hospitality | 2025 |
| Hightech Private Limited | Professional & scientific | 2020 |
| Hightech Women Limited | Professional & scientific | 1999 |
| Highters Heath Convenience Store Ltd | Wholesale & retail | 2018 |
| Hightex (UK) Limited | Real estate | 1995 |
| Highwaterenergy Limited | Administrative & support | 2008 |
| Highway Safety Solutions Ltd | Other services | 2016 |
| Highway Sales Ltd | Wholesale & retail | 2018 |
| Highway Spares Ltd | Wholesale & retail | 2024 |
| Highway Traffic Management Holdings Limited | Professional & scientific | 2014 |
| Highway Traffic Management Limited | Construction | 1988 |
| Highways England Company Limited | Extraterritorial | 2021 |
| Highways FIX Ltd | Construction | 2019 |
| Highwood (Horsham) Management Company Limited | Households | 2012 |
| Hiiliye Travel Ltd | Administrative & support | 2021 |
| HIJ Enterprises Ltd | Other services | 2019 |
| Hijama Al-Shifa Ltd | Health & social care | 2025 |
| Hijama Nation Limited | Education | 2013 |
| Hijama Online Academy Ltd | Education | 2024 |
| Hijaz Travel Limited | Administrative & support | 2004 |
| Hijaz World Ltd | Wholesale & retail | 2025 |
| Hijrah Housing Ltd | Real estate | 2025 |
| HIK Capital Holdings Ltd | Information & communication | 2015 |
| Hikaro Ltd | Administrative & support | 2021 |
| Hike Sports Wear Ltd | Wholesale & retail | 2021 |
| Hikma Consultants Limited | Professional & scientific | 2012 |
| Hikmah Supported Living Ltd | Real estate | 2026 |
| Hikmahgrowth Ltd | Professional & scientific | 2025 |
| Hilal Cleaning Services Ltd | Administrative & support | 2020 |
| Hilal Tours & Travel Limited | Administrative & support | 2012 |
| Hilaly Ltd | Wholesale & retail | 2020 |
| Hilary Housing Ltd | Health & social care | 2025 |
| Hildegard Beverages Ltd. | Manufacturing | 2024 |
| Hildercroft Management Company Limited | Households | 1983 |
| Hilderock Limited | Information & communication | 2023 |
| Hilib House 2 Ltd | Hospitality | 2025 |
| Hiline Foods Ltd | Wholesale & retail | 2024 |
| Hiline Motors Ltd | Wholesale & retail | 2021 |
| Hill & Co. Consulting Ltd | Other services | 2017 |
| Hill & Hall Group Ltd | Construction | 2016 |
| Hill & Parsons Property Ltd | Real estate | 2021 |
| Hill Brickwork Ltd | Construction | 2025 |
| Hill City Real Estate Ltd | Real estate | 2025 |
| Hill Construction Ltd | Construction | 2019 |
| Hill Court Management Company Limited | Households | 1983 |
| Hill Farm Lilley Green LLP | | 2019 |
| Hill Hook House RTM Company Limited | Real estate | 2006 |
| Hill Rise Properties Ltd | Real estate | 2019 |
| Hill Superior Ltd | Construction | 2026 |
| Hill Tea Ltd | Hospitality | 2025 |
| Hill View Caravan Site Limited | Hospitality | 2018 |
| Hill View Park Limited | Real estate | 2017 |
| Hill View Properties (Redditch) Limited | Real estate | 2015 |
| Hillara Ltd | Hospitality | 2025 |
| Hillary Hotel NO.1 Limited | Hospitality | 2014 |
| Hillax Limited | | 2012 |
| Hillbilly's Street Food Ltd | Hospitality | 2022 |
| Hillcourt Road Management Company Limited | Real estate | 2009 |
| Hillcress Ltd | Real estate | 2023 |
| Hillcrest Imports UK Limited | Wholesale & retail | 2024 |
| Hillcrest School and Sixth Form Centre | Education | 2011 |
| Hillcroft Right to Manage Company Limited | Households | 2010 |
| Hillfort Place MAN. Co. Ltd | Households | 2022 |
| Hillgrove Developments Group Limited | Financial services | 2022 |
| Hillhock Limited | Administrative & support | 1999 |
| Hillingdon Bilston Limited | Real estate | 2023 |
| Hillmak Property Limited | Real estate | 2024 |
| Hills Concrete Limited | Manufacturing | 2011 |
| Hills Global Ltd | Financial services | 2021 |
| Hills International Ltd | Financial services | 2021 |
| Hills Numberplates Limited | Wholesale & retail | 2013 |
| Hills Teeth Ltd | Other services | 2026 |
| Hillsborough 1899 Limited | Real estate | 2026 |
| Hillside (Great Barr) Management Limited | Real estate | 1982 |
| Hillside Bison Precision Ltd | Manufacturing | 2001 |
| Hillside Care Services Community Interest Company | Health & social care | 2008 |
| Hillside Travels Birmingham Limited | Administrative & support | 2017 |
| Hillstone Primary School | Education | 2014 |
| Hillstreet Construction Limited | Construction | 2000 |
| Hillstreet Green Research LLP | | 2009 |
| Hillstreet UK Holdings Limited | Administrative & support | 2019 |
| Hillstreet UK Limited | Construction | 2007 |
| Hilltop FIC Limited | Financial services | 2025 |
| Hilltown Properties Limited | Real estate | 2019 |
| Hillvion Hub Limited | Wholesale & retail | 2025 |
| Hillwood Property Ltd | Construction | 2026 |
| Hils Healthcare Ltd | Health & social care | 2019 |
| Hilset Solutions Ltd | Real estate | 2024 |
| Hilston Ltd | Real estate | 2023 |
| Hilston Park Limited | Real estate | 2020 |
| Hilti Industries (G.B.) Limited | Manufacturing | 1945 |
| Hilton Automation Limited | Professional & scientific | 2024 |
| Hilton Hall Entertainments Ltd | Real estate | 2017 |
| Hilton Hall Limited | Administrative & support | 2000 |
| Hilton Housing Ltd | Real estate | 2019 |
| Hilton Kitchens & Bedrooms Ltd | Manufacturing | 2015 |
| Hilton Properties.Co.Uk Limited | Real estate | 2004 |
| Hilton Property Holdings Limited | Extraterritorial | 1957 |
| Hilton Property Management Ltd | Real estate | 2018 |