| Highfield House Redditch Limited | Real estate | 2026 |
| Highfield James Consulting Limited | Administrative & support | 2017 |
| Highfield Solicitors Limited | Professional & scientific | 2014 |
| Highgold Projects Ltd | Real estate | 2025 |
| Highline Associates Limited | Wholesale & retail | 2022 |
| Highstone Group Ltd | Construction | 2023 |
| Highstone Primrose Heights Ltd | Real estate | 2025 |
| Highstone Strategic Land Ltd | Real estate | 2025 |
| Highstone the Ings Ltd | Real estate | 2025 |
| Hikmah Youth CIC | Education | 2026 |
| Hilary Bickler Limited | Professional & scientific | 2015 |
| Hill Johnstone Limited | Extraterritorial | 2003 |
| Hill Johnstone Wealth Management Limited | Professional & scientific | 2021 |
| Hill Nursery Limited | Education | 2022 |
| Hill Print & Media Solutions Ltd | Manufacturing | 2021 |
| Hill Rise Architecture Ltd | Professional & scientific | 2024 |
| Hill Top (Huddersfield) Limited | Real estate | 1999 |
| Hillam Tyres Ltd | Wholesale & retail | 2011 |
| Hillcity Ltd | Health & social care | 2021 |
| Hillcrest Geotechnical Limited | Professional & scientific | 2023 |
| Hillcrest Golcar Management Limited | Real estate | 2019 |
| Hillglaze Limited | Real estate | 2010 |
| Hillhouse Tutoring Ltd. | Education | 2017 |
| Hillmark Ecommerce Limited | Wholesale & retail | 2025 |
| Hillsdale Limited | Real estate | 1986 |
| Hillside Engineering Services Ltd | Extraterritorial | 2024 |
| Hillside House Day Nursery Limited | Health & social care | 2003 |
| Hilltop Holdings Limited | Professional & scientific | 2015 |
| Hillvic Limited | Real estate | 2021 |
| Hilton Leigh Properties Limited | Administrative & support | 1951 |
| Hiltons Brushes EST 1841 Limited | Manufacturing | 2017 |
| Himalayan Cares Salt Traders Limited | Wholesale & retail | 2023 |
| Himaya Cybersecurity Consulting Ltd | Information & communication | 2023 |
| Himaya Energy Limited | Energy | 2024 |
| Hinchliffe Architecture & Design Ltd | Professional & scientific | 2019 |
| Hinchliffe Developments Ltd | Construction | 2020 |
| Hinchliffe Electrical Ltd | Construction | 2012 |
| Hinchliffe Homes Limited | Real estate | 2022 |
| Hinchliffe Ltd | Administrative & support | 2016 |
| Hinchliffe Mill Management Limited | Construction | 2025 |
| Hinchliffe Partnership LLP | | 2010 |
| Hindle Property Ltd | Real estate | 2025 |
| Hinesight Properties Ltd | Real estate | 2021 |
| HIP2KNEE Ltd | Health & social care | 2020 |
| Hira Design + Arch Ltd | Professional & scientific | 2025 |
| Hird Holdings Limited | Financial services | 2022 |
| Hirst Facilities Ltd | Real estate | 2018 |
| Hirst Instrument Systems Limited | Manufacturing | 2016 |
| Hirst Joinery Ltd | Construction | 2022 |
| Hirstle Fabrications Limited | Manufacturing | 2007 |
| Hisko Limited | Administrative & support | 2025 |
| Historic Military Antiques Limited | Wholesale & retail | 2013 |
| Hitchen Properties Ltd | Real estate | 2024 |
| Hitchfields Ltd | Wholesale & retail | 2021 |
| Hitech Glazing Limited | Water & waste | 2004 |
| Hitechnotech Ltd | Wholesale & retail | 2025 |
| Hive Childcare Ltd | Health & social care | 2026 |
| Hive Huddersfield CIC | Hospitality | 2021 |
| Hive Medical Group Ltd | Health & social care | 2022 |
| Hive Recovery C.I.C. | Health & social care | 2025 |
| Hiwa Estate Ltd | Real estate | 2025 |
| Hixfix Limited | Other services | 2014 |
| Hizina Limited | Information & communication | 2025 |
| Hizu Tech Limited | Wholesale & retail | 2025 |
| HJ Optical Ltd | Health & social care | 2022 |
| HJA Property Ltd | Real estate | 2019 |
| HK Sublime Ltd | Wholesale & retail | 2021 |
| HKM Ltd | Health & social care | 2017 |
| HKM Motors Limited | Wholesale & retail | 2022 |
| HKM Play Ltd | Arts & recreation | 2013 |
| HLC Projects Limited | Professional & scientific | 2023 |
| HLK Autos Ltd | Wholesale & retail | 2024 |
| Hllh Ltd | Financial services | 2020 |
| HM Fried Chicken Ltd | Hospitality | 2024 |
| HM Services Holdings Ltd | Financial services | 2026 |
| HM UK Dent Ltd | Health & social care | 2025 |
| HM Visa Consultants Ltd | Professional & scientific | 2025 |
| HMA Media Ltd | Professional & scientific | 2024 |
| HMA Optics Ltd | Health & social care | 2021 |
| HMF Equestrian Limited | Agriculture & fishing | 2018 |
| HMS Trading Ltd | Wholesale & retail | 2021 |
| HNA Products Ltd | Wholesale & retail | 2024 |
| Hnaseem Ltd | Wholesale & retail | 2024 |
| Hnba Limited | Health & social care | 2021 |
| Hngry Ltd | Wholesale & retail | 2025 |
| HO WAH Takeaway Limited | Hospitality | 2022 |
| Hoco Parts UK Ltd | Wholesale & retail | 1983 |
| Holberry Hounds Ltd | Other services | 2021 |
| Holcon Group Ltd | Construction | 2018 |
| Holcon Holdings Ltd | Construction | 2019 |
| Holda Ltd | Real estate | 2018 |
| Holden Fencing Contractors Limited | Construction | 2018 |
| Holden Smith Law Limited | Professional & scientific | 2018 |
| Holder Smith Ltd | Professional & scientific | 2026 |
| Holdfast Inc Ltd | Real estate | 2023 |
| Holdphase Property Management Limited | Real estate | 1993 |
| Holdson Limited | Manufacturing | 2021 |
| Holistic Clinics (HD) Ltd | Health & social care | 2024 |
| Holistic Occupational Therapy Limited | Health & social care | 2009 |
| Holla ME! Consultancy Limited | Professional & scientific | 2015 |