| Harrogate Traders Ltd | Administrative & support | 2025 |
| HARROGATE12 Limited | Real estate | 2016 |
| HARROGATE14 Limited | Real estate | 2016 |
| HARROGATE456 Limited | Real estate | 2015 |
| Harroley Limited | Wholesale & retail | 2025 |
| Harron Group Limited | Financial services | 2002 |
| Harron Homes (Midlands) Limited | Extraterritorial | 2004 |
| Harron Homes (North West) Limited | Extraterritorial | 2002 |
| Harron Homes Limited | Construction | 1995 |
| Harrop Court LLP | | 2017 |
| Harrow Medical Services Ltd | Health & social care | 2026 |
| Harrowby Street Property Limited | Real estate | 2023 |
| Harrower Ventilation Limited | Administrative & support | 2017 |
| Harry & MAC Ltd | Wholesale & retail | 2024 |
| Harry Adcock Limited | Extraterritorial | 2015 |
| Harry Brook Promotions Ltd | Administrative & support | 2022 |
| Harry Flintoft Ltd | Transport & logistics | 2025 |
| Harry Sanders Limited | Real estate | 1955 |
| Harry ST Limited | Construction | 2022 |
| Harry's Store Limited | Wholesale & retail | 2018 |
| Hart & Sumpner Holdings Limited | Financial services | 2026 |
| Hart & Sumpner Limited | Construction | 2005 |
| Hart Asset Management Ltd | Administrative & support | 2021 |
| Hart Landscapes Ltd | Administrative & support | 2002 |
| Hart Living FH Ltd | Real estate | 2025 |
| Hart Living LH Ltd | Real estate | 2025 |
| Hart Living Ltd | Real estate | 2023 |
| Hart of Yorkshire Limited | Other services | 2002 |
| Hartburn Plumbing and Bathrooms Ltd | Construction | 2018 |
| Hartez Corporation Limited | Professional & scientific | 2003 |
| Hartlepool Park Road Properties Limited | Hospitality | 2014 |
| Hartley Decorators Ltd | Construction | 2021 |
| Hartley Directors Limited | Real estate | 2020 |
| Hartley Partitioning Limited | Construction | 2007 |
| Hartley Plant Hire Limited | Construction | 2005 |
| Hartley Sanderson Ltd | Administrative & support | 2025 |
| Hartman HR and Mediation Ltd | Administrative & support | 2024 |
| Hartmann Young Limited | Administrative & support | 2016 |
| Hartney Communications Ltd | Professional & scientific | 2025 |
| Harton Works Limited | Information & communication | 2020 |
| Hartrigg Properties Limited | Real estate | 1965 |
| Hartserver Ltd | Extraterritorial | 2018 |
| Haruspex Ltd | Information & communication | 2020 |
| Harvale Consulting Ltd | Professional & scientific | 2018 |
| Harvest Island Limited | Information & communication | 2009 |
| Harvey Burns & Co. Limited | Professional & scientific | 1995 |
| Harvey Herbert Limited | Financial services | 2026 |
| Harvey Isaacs & Sons Limited | Real estate | 2017 |
| Harvey Precision Limited | Manufacturing | 2009 |
| Harvey Propert Ltd | Real estate | 2025 |
| Harvey Property Services Limited | Real estate | 2022 |
| Harvey S.E. Ltd | Professional & scientific | 2021 |
| Harvey Tabitha Limited | Real estate | 2020 |
| Harveyjames International Limited | Wholesale & retail | 2015 |
| Harvey’S Consultancy Services Ltd | Information & communication | 2023 |
| Harvie Tyres Limited | Wholesale & retail | 2004 |
| Harvion Ltd | Real estate | 2026 |
| Harwan Property Developments Ltd | Construction | 2025 |
| Harwood Global Ltd | Administrative & support | 2019 |
| Harwood Holiday Lets Ltd | Hospitality | 2024 |
| Harwood Roofing Contractors Limited | Construction | 2018 |
| Harwoods Law Limited | Professional & scientific | 2017 |
| Harworth House RTM Company Limited | Households | 2022 |
| Harworth Plant & Equipment Ltd | Mining & quarrying | 1991 |
| HAS 5AR Ltd | Hospitality | 2020 |
| Hasaank Ltd | Transport & logistics | 2025 |
| Hasan Fast Food Ltd | Hospitality | 2012 |
| Hasgas Ltd | Construction | 2023 |
| Hash Define Electronics Ltd | Professional & scientific | 2014 |
| Hash Foods Ltd | Hospitality | 2019 |
| Hashcaffe Limited | Hospitality | 2025 |
| Hashcommerce Ltd | Wholesale & retail | 2026 |
| Hashmi Limited | Other services | 2022 |
| Hashmi Parmar Ltd | Wholesale & retail | 2011 |
| Hasib Habib Limited | Administrative & support | 2025 |
| Hasmmat Cleaning Service Ltd | Administrative & support | 2024 |
| Hasnain Fast Foods Ltd | Hospitality | 2025 |
| Hass Corp Limited | Hospitality | 2026 |
| Hassaan Imtiaz Trading Ltd | Wholesale & retail | 2022 |
| Hassan and Hashim Properties Limited | Real estate | 2025 |
| Hassan Online Limited | Wholesale & retail | 2026 |
| Hasselfeldt Bird and BAT Boxes Limited | Wholesale & retail | 2025 |
| Hassiet Meley Ltd | Real estate | 2023 |
| Hasti Holdings Ltd | Real estate | 2025 |
| Hastiar Ltd | Administrative & support | 2024 |
| Hastings Management Group Ltd | Real estate | 2017 |
| Haston Property Ltd | Real estate | 2026 |
| Hatch & Home Ltd | Real estate | 2025 |
| Hatch Communications Limited | Professional & scientific | 2008 |
| Hatch Haus Limited | Information & communication | 2025 |
| Hatched Group Limited | Financial services | 2022 |
| Hatchhatch Ltd | Hospitality | 2024 |
| Hatchwood Associates Ltd | Professional & scientific | 2018 |
| Hateema ZIA Ltd | Real estate | 2026 |
| Hatfield Oncology Ltd | Health & social care | 2015 |
| Hattersley Homes Limited | Real estate | 2020 |
| Hattons Legal Services Limited | Other services | 2015 |
| Haul About US Limited | Transport & logistics | 2011 |
| Haus Advisory Ltd | Financial services | 2021 |
| Haus Bloc Ltd | Real estate | 2019 |