| Harriot Homes Ltd | Real estate | 2025 |
| Harriott Homes Ltd | Real estate | 2020 |
| Harris & Farris Limited | Wholesale & retail | 2021 |
| Harris Property Restoration Ltd | Real estate | 2022 |
| Harrisdent Ltd | Health & social care | 2015 |
| Harrison Innovation Holding Ltd | Wholesale & retail | 2017 |
| Harry Brook & Son(Huddersfield)Limited | Construction | 1961 |
| Harry Brook Holdings Limited | Financial services | 2022 |
| Harry's Doors Ltd | Manufacturing | 2025 |
| Hars Beauty Ltd | Wholesale & retail | 2026 |
| Hart Bar Ltd | Hospitality | 2017 |
| Hart HD12 Ltd | Hospitality | 2026 |
| Hartco UK Ltd | Wholesale & retail | 2019 |
| Harte Consulting Ltd | Administrative & support | 2022 |
| Hartford Holdings Group Limited | Financial services | 2020 |
| Hartford Holdings Limited | Administrative & support | 2010 |
| Hartley Contracts Ltd | Real estate | 2022 |
| Hartley Holdings Ltd | Financial services | 2017 |
| Hartley Homes Construction Ltd | Construction | 2025 |
| Hartley Quality Residential Developments ( NO. 1) Limited | Extraterritorial | 2007 |
| Hartley Quality Residential Developments Limited | Construction | 2006 |
| Hartmire Limited | Information & communication | 2018 |
| Harvey & Ryall Ltd | Real estate | 2017 |
| Harvey James Lifestyle Store Limited | Wholesale & retail | 2017 |
| Harvey James Properties Limited | Real estate | 2024 |
| Harvey Roofing Services Ltd | Construction | 2026 |
| Harvey's Bar/Kitchen Ltd | Hospitality | 2020 |
| Harvey's Drive-Thru Ltd | Hospitality | 2022 |
| Haryad (UK) Ltd | Wholesale & retail | 2021 |
| Hasan Optical Ltd | Health & social care | 2021 |
| Hashdent Ltd | Health & social care | 2022 |
| Hashem UK Ltd | Wholesale & retail | 2025 |
| Hashim CAB Ltd | Transport & logistics | 2026 |
| Haskell Properties Limited | Real estate | 2014 |
| Hasmos Care Services Limited | Health & social care | 2021 |
| Hass Online UK Ltd | Wholesale & retail | 2024 |
| Hassle Free Logistics Ltd | Transport & logistics | 2019 |
| Hasthetics Ltd | Health & social care | 2023 |
| Hastings of England Limited | Extraterritorial | 1983 |
| Hatton Klein Limited | Professional & scientific | 2018 |
| Haulage Helpers Ltd | Transport & logistics | 2025 |
| Haulage Yard Ltd | Transport & logistics | 2026 |
| Haunch Commercial Services Ltd | Professional & scientific | 2024 |
| Haus of Hair by AMY & Co Ltd | Other services | 2023 |
| Haus Scissett Ltd | Manufacturing | 2026 |
| Hausmo Lettings & Management Ltd | Real estate | 2026 |
| Hava Nasar Ltd | Health & social care | 2021 |
| Havago Ltd | Wholesale & retail | 2023 |
| Haval Carwash Ltd | Administrative & support | 2024 |
| Haven Adult Services Ltd | Health & social care | 2026 |
| Haven Motors Limited | Wholesale & retail | 2007 |
| Haven PVT Limited | Real estate | 2023 |
| Havenfix Home Solutions Ltd | Professional & scientific | 2026 |
| Havenfolk Ltd | Wholesale & retail | 2025 |
| Havenly Goods Ltd | Wholesale & retail | 2026 |
| Havilland Asset Management Limited | Real estate | 2022 |
| Havilland Strategic Land Limited | Real estate | 2022 |
| Hawa Skincare Ltd | Wholesale & retail | 2023 |
| Hawk Trading Ltd | Wholesale & retail | 2021 |
| Hawkbay Construction Limited | Construction | 2007 |
| Hawkguard Ltd | Administrative & support | 2024 |
| Hawkmakesfood Limited | Wholesale & retail | 2022 |
| Hawkstone Construction Limited | | 1999 |
| Haworth Electrics Limited | Construction | 2016 |
| Haworth Financial Management Limited | Administrative & support | 2020 |
| Haworth Plating & Welding Services Ltd | Construction | 2018 |
| Haworth Property Management Limited | Real estate | 2023 |
| Hawthorn Rise (Management) Limited | Households | 2015 |
| Hawwa Health Ltd | Health & social care | 2025 |
| Haya Healthcare Ltd | Health & social care | 2023 |
| Haya Trading Ltd | Wholesale & retail | 2021 |
| Hayaa the Label Ltd | Wholesale & retail | 2022 |
| Hayat & Samee Ltd | Wholesale & retail | 2023 |
| Hayat Kinship Holdings Ltd | Real estate | 2026 |
| Hayat Tech Ltd | Information & communication | 2021 |
| Hayes Construction Ltd | Construction | 2019 |
| Hayley's World Limited | Professional & scientific | 2020 |
| Hayrewood Enterprise Ltd | Real estate | 2024 |
| Hayy Ltd | Financial services | 2024 |
| Hayy Luxury Homes Ltd | Hospitality | 2024 |
| Hayyat Holdings Ltd | Real estate | 2022 |
| Hazelhead Design Limited | Wholesale & retail | 2012 |
| HB Bearings Limited | Manufacturing | 1972 |
| HB Consultancy Services Ltd | Health & social care | 2021 |
| HB Consultancy Solutions Ltd | Health & social care | 2021 |
| HB Fabs Ltd | Manufacturing | 2025 |
| HB Locum Ltd | Professional & scientific | 2010 |
| HB Media & Optics Ltd | Professional & scientific | 2025 |
| HBC Original Ltd | Wholesale & retail | 2020 |
| HBK Optics Ltd | Health & social care | 2022 |
| HCF Publishing Ltd | Information & communication | 2000 |
| HCH Medical Ltd | Health & social care | 2014 |
| HCM Developments (Huddersfield) Ltd | Construction | 2008 |
| HD Accountancy Services Ltd | Professional & scientific | 2005 |
| HD Alpacas Limited | Agriculture & fishing | 2020 |
| HD Asian Art Ltd | Wholesale & retail | 2011 |
| HD Assets Ltd | Real estate | 2018 |
| HD Builders Ltd | Construction | 2017 |
| HD Cargo & Travel Ltd | Administrative & support | 2025 |
| HD Check in Ltd | Real estate | 2020 |