| Haddington Advisory Limited | Professional & scientific | 2023 |
| Haddington Homes Limited | Construction | 2014 |
| Hadi and Brothers Ltd | Hospitality | 2025 |
| Hadyana POT Ltd | Hospitality | 2026 |
| HAH Motors Ltd | Wholesale & retail | 2026 |
| Haigh Huddleston & Associates Limited | Construction | 2007 |
| Hair by JAY Parker Ltd | Other services | 2025 |
| Hair by KIM Limited | Other services | 2023 |
| Hair by Nicola W Ltd | Other services | 2022 |
| Hair Wizard HQ Limited | Other services | 2014 |
| Hairdressing With Alexandra Ltd | Other services | 2024 |
| Hale Draxon Mechanical Services Ltd | Construction | 2021 |
| Halfway Desserts Limited | Hospitality | 2025 |
| Hall and Lane Global Limited | Information & communication | 2026 |
| Hall Trading Ltd | Wholesale & retail | 2023 |
| Hallamshire Engineering Services Limited | Manufacturing | 2009 |
| Hallas Property Ltd | Real estate | 2024 |
| Hallas STL Ltd | Real estate | 2025 |
| Halliday Financial Ltd | Information & communication | 2015 |
| Halo Hair Extensions Collective Limited | Administrative & support | 2022 |
| Halzak Recruitment Group Ltd | Information & communication | 2022 |
| Hamara Capital Limited | Health & social care | 2024 |
| Hambleton Estates Limited | Real estate | 1988 |
| Hambleton Leisure Ltd | Hospitality | 2018 |
| Hambleton Outdoor Ltd | Wholesale & retail | 2018 |
| Hambling Utility Services Limited | Administrative & support | 2007 |
| Hamill Investments 1970 Ltd | Households | 2026 |
| Hamoré Official Ltd | Wholesale & retail | 2025 |
| Hampsons Property Services Ltd | Construction | 2023 |
| Hampton Investment Solutions Ltd | Wholesale & retail | 2019 |
| Hampton York Limited | Real estate | 2021 |
| Hampton York West View Limited | Real estate | 2021 |
| Hamsard 3446 Limited | Professional & scientific | 2017 |
| Hamsard 3447 Limited | Professional & scientific | 2017 |
| Hamssa Holdings Ltd | Real estate | 2023 |
| Handelsvertretung Waagen UND Maschinen Sperling Ltd. | Wholesale & retail | 2015 |
| Handling Movement & Ergonomics Limited | Health & social care | 2003 |
| Handy to Have Property Maintenance Ltd | Construction | 2026 |
| Hannah ( General) Traders Limited | Wholesale & retail | 2015 |
| Hannah Aesthetic & Health Clinic Ltd | Health & social care | 2012 |
| Hannah Alexander Aesthetics Limited | Other services | 2024 |
| Hannah Global Limited | Wholesale & retail | 2014 |
| Hanover Developments (Wakefield) Limited | Construction | 1993 |
| Hanover Walton Ltd | Construction | 2014 |
| Hanz Investments Ltd | Administrative & support | 2014 |
| Happihr Ltd | Administrative & support | 2025 |
| Happy Clean Yorkshire Ltd | Administrative & support | 2007 |
| Happy Days Limited | Real estate | 1996 |
| Happy Hounds Huddersfield Ltd | Agriculture & fishing | 2023 |
| Harchester Limited | Real estate | 2025 |
| Hardwick Power Networks Limited | Professional & scientific | 2017 |
| Harlow and Milner Limited | Wholesale & retail | 1937 |
| Harlow Property Management Limited | Real estate | 2009 |
| Harold (UK) Limited | Real estate | 2006 |
| Harper Financial Associates Ltd. | Professional & scientific | 2019 |
| Harper Trading Ltd | Information & communication | 2019 |
| Harpers Heating (Leeds) Limited | Construction | 2016 |
| Harribow Security Ltd | Administrative & support | 2013 |
| Harris & Smith Recruitment Consultancy Limited | Administrative & support | 2020 |
| Harris Automobili 365 Ltd | Wholesale & retail | 2026 |
| Harris Medical Ltd | Health & social care | 2019 |
| Harrison Architectural Heritage Ltd | Professional & scientific | 2020 |
| Harrison Blakeley Accountancy Limited | Professional & scientific | 2010 |
| Harrison Estates Selby Limited | Real estate | 2023 |
| Harrogate Investment Group Ltd | Hospitality | 2023 |
| Harry Thornton & SON Limited | Professional & scientific | 1967 |
| Harry Wilby Consultancy Limited | Professional & scientific | 2017 |
| Harrys Kitchen Wakefield Limited | Hospitality | 2026 |
| Hart Protection Ltd | Financial services | 2023 |
| Hartley Logistics Ltd | Wholesale & retail | 2024 |
| Hartwell Manufacturing Ltd | Manufacturing | 1973 |
| Harval Fitted Furniture Limited | Professional & scientific | 1996 |
| Harvest Afromart Foods Store Ltd | Wholesale & retail | 2025 |
| Harvey Inns Leicestershire Ltd | Hospitality | 2016 |
| Hasalliu Properties Ltd | Real estate | 2024 |
| Hashtag Media Ltd | Wholesale & retail | 2024 |
| Hashut Couriers Ltd | Transport & logistics | 2024 |
| Hatfield Property Management Ltd | Real estate | 2016 |
| Hathaway Clarke Ltd | Manufacturing | 2015 |
| Hatherley Consultants Ltd | Professional & scientific | 2016 |
| Hatsofa Ltd | Information & communication | 2025 |
| Haulass Ltd | Transport & logistics | 2026 |
| Haulmark Ltd | Transport & logistics | 2022 |
| Haulz-All Europe Limited | Wholesale & retail | 2016 |
| Haus of Forme Ltd | Arts & recreation | 2025 |
| Haus of Harriet Trading Limited | Wholesale & retail | 2025 |
| Haus Wakefield Ltd. | Manufacturing | 2025 |
| Hauser Developments (Meltham) Ltd | Real estate | 2025 |
| Hauser Holdings Ltd | Financial services | 2025 |
| Hauser Timber Frame Ltd | Construction | 2025 |
| Haustechnik Zilken Ltd | Professional & scientific | 2006 |
| Hauz Group Ltd | Administrative & support | 2025 |
| Havall Properties Ltd | Real estate | 2026 |
| Haven Ventures Ltd | Financial services | 2022 |
| Havens UK Property Limited | Real estate | 2017 |
| Havillah Properties Limited | Real estate | 2019 |
| Hawley Plant Hire Limited | Administrative & support | 2017 |
| Hawthorn House Aesthetics Ltd | Health & social care | 2025 |
| Hawthorn Rise Manco Limited | Households | 2026 |
| Hawthorne Estates (Northern) Limited | Professional & scientific | 2003 |