| Harrisons Lettings & Management Ltd | Real estate | 2018 |
| Harrisons MOT Centre Limited | Wholesale & retail | 2010 |
| Harriss Property Limited | Construction | 2011 |
| Harrocks Commercial Property Ltd | Real estate | 2018 |
| Harrogate Build NW Ltd | Administrative & support | 2015 |
| Harrogate Exchange LP | | 2023 |
| Harrogate GP LLP | | 2023 |
| Harrogate Holdco Limited | Real estate | 2025 |
| Harrogate LP | | 2023 |
| Harrogate Nominees 1 Limited | Real estate | 2023 |
| Harrogate Nominees 2 Limited | Real estate | 2023 |
| Harrogate Self Drive Hire Limited | Wholesale & retail | 2017 |
| Harrogate Street Properties Limited | Real estate | 2021 |
| Harrop Engineering Contractors Limited | Professional & scientific | 2026 |
| Harrop Plastering Limited | Construction | 2025 |
| Harrow Building Services & Civil Engineering Ltd | Construction | 2016 |
| Harrow Community Schools PFI Ltd | Administrative & support | 2002 |
| Harrowardandsmith Ltd | Hospitality | 2016 |
| Harry & Brothers Investments Ltd | Real estate | 2019 |
| Harry & Partners Limited | Health & social care | 2015 |
| Harry Boodhoo & Co Limited | Professional & scientific | 2018 |
| Harry Davis Ltd | Wholesale & retail | 2025 |
| Harry DOH Ltd | Transport & logistics | 2019 |
| Harry Films Ltd | Information & communication | 2019 |
| Harry Heywood (Builders) Limited | Real estate | 1956 |
| Harry Jack Sports Ltd | Extraterritorial | 2011 |
| Harry Lamb Ltd | Wholesale & retail | 2026 |
| Harry MCR Limited | Administrative & support | 2014 |
| Harry Mullan Ltd | Wholesale & retail | 2025 |
| Harry Needle Railroad Company Ltd | Manufacturing | 1999 |
| Harry Paul Medical Limited | Health & social care | 2021 |
| Harry Retailer Ltd | Wholesale & retail | 2024 |
| Harry Ross IIP Settlement 2003 Limited | Professional & scientific | 2003 |
| Harry Wilding Limited | Other services | 2024 |
| Harry Yard Group Ltd | Other services | 2023 |
| Harry's Chicken Prestwich Ltd | Hospitality | 2019 |
| Harrys Chippy Limited | Hospitality | 2015 |
| Harrys House Inns Ltd | Hospitality | 2026 |
| Harsha Kitchen Ltd | Hospitality | 2026 |
| Harshal Patel Ltd | Hospitality | 2016 |
| Harsharan Properties Ltd | Real estate | 2024 |
| Harshmeen Transport Limited | Transport & logistics | 2017 |
| Hart Care Essex Ltd | Health & social care | 2017 |
| Hart Childrens Homes Ltd | Health & social care | 2024 |
| Hart Common PRE School Ltd | Education | 2018 |
| Hart Electrical Services Northwest Ltd | Construction | 2023 |
| Hart Property Investments Northwest Ltd | Real estate | 2025 |
| Hart Psychology Ltd | Health & social care | 2024 |
| Hart Road Management Company Limited | Households | 2000 |
| Hartburn & Browns Limited | Transport & logistics | 2018 |
| Hartfield Developments Limited | Real estate | 2001 |
| Hartford Bidco Limited | Financial services | 2024 |
| Hartford Lower Midco Limited | Financial services | 2024 |
| Hartford Midco Limited | Financial services | 2024 |
| Hartford Steam Boiler UK Limited | Professional & scientific | 1992 |
| Hartford Topco Limited | Financial services | 2024 |
| Harthorpe Ltd | Wholesale & retail | 2012 |
| Hartingdon House Limited | Professional & scientific | 1981 |
| Hartley Accountancy Limited | Professional & scientific | 2010 |
| Hartley Hall of Residence Ltd | Hospitality | 2018 |
| Hartley Management Ltd | Real estate | 2016 |
| Hartley Rose Limited | Construction | 2021 |
| Hartley Safety Consultants Ltd | Professional & scientific | 2013 |
| Hartley Secure Storage Limited | Transport & logistics | 2025 |
| Hartley Thomas & Wright Limited | Professional & scientific | 2025 |
| Hartleys Heating & Plumbing Manchester Limited | Construction | 2019 |
| Hartshead Productions Limited | Information & communication | 2012 |
| Hartshead Property Group Ltd | Construction | 2025 |
| Harttron Limited | Construction | 1994 |
| Hartwood Technology Consulting Ltd | Professional & scientific | 2023 |
| Haru Cloud Studio Ltd | Manufacturing | 2026 |
| Harun Dilek Ltd | Wholesale & retail | 2025 |
| Harun Food Market Ltd | Wholesale & retail | 2024 |
| Harutya Trading Ltd | Wholesale & retail | 2020 |
| Harveland-Lee Limited | Professional & scientific | 2023 |
| Harventon Ltd | Wholesale & retail | 2025 |
| Harvest Air Limited | Manufacturing | 2021 |
| Harvest Flavours Ltd | Hospitality | 2024 |
| Harvest Land (1) Limited | Financial services | 2007 |
| Harvest Land (2) Limited | Administrative & support | 2007 |
| Harvest Land (4) Limited | Administrative & support | 2007 |
| Harvest Moon Trading Partners Ltd | Extraterritorial | 2026 |
| Harvest Restaurant Ltd | Hospitality | 2018 |
| Harvester Consultants Limited | Administrative & support | 1974 |
| Harvey & Nova Ltd | Information & communication | 2025 |
| Harvey Advisory Ltd | Professional & scientific | 2025 |
| Harvey Brothers Ltd | Administrative & support | 2008 |
| Harvey Business Ventures Ltd | Other services | 2008 |
| Harvey Doble Ltd | Wholesale & retail | 2025 |
| Harvey Knowles Ltd | Construction | 2026 |
| Harvey Lane Optical Ltd | Wholesale & retail | 2025 |
| Harvey Locations Limited | Transport & logistics | 2023 |
| Harvey Phone & Vapes Ltd | Wholesale & retail | 2023 |
| Harvey Scott Cheshire Limited | Real estate | 2015 |
| Harvey West Limited | Other services | 2021 |
| Harvey's Jewellers Limited | Wholesale & retail | 1977 |
| Harveys Homes Limited | Real estate | 2015 |
| Harwood Jackson (Builders Merchants) Limited | Wholesale & retail | 1999 |
| Harwood Thermal Insulation Limited | Construction | 2012 |
| Harwoods Holdings Ltd | Wholesale & retail | 2019 |