| Heart Healthcare Solutions Ltd | Health & social care | 2025 |
| Heart Hub Limited | Professional & scientific | 2024 |
| Heart in Craft Ltd | Wholesale & retail | 2018 |
| Heart of Sicily Ltd | Hospitality | 2019 |
| Heartview Limited | Health & social care | 2025 |
| Heason Events Limited | Administrative & support | 2008 |
| Heat Pumps Sheffield Limited | Extraterritorial | 2022 |
| Heath Kitchen Cardiff Limited | Hospitality | 2023 |
| Heather Dixon T/A NXT Level Hair Ltd | Other services | 2017 |
| Heather J Creative Ltd | Arts & recreation | 2026 |
| Heather Moffat Fitness Ltd | Education | 2025 |
| Heatherfield Conservative Club Limited | Hospitality | 1971 |
| Heathers Painting & Decorating Limited | Construction | 2025 |
| Heather’S Nails & Beauty Limited | Other services | 2023 |
| Heathfield Property Ltd | Real estate | 2021 |
| Heathrow Coach Hire Holdings Limited | Financial services | 2025 |
| Heathrow Coach Hire Ltd | Transport & logistics | 2023 |
| Heating Installations Limited | Construction | 2020 |
| Heating Spares Controls Limited | Wholesale & retail | 2009 |
| Heatparts Limited | Manufacturing | 2007 |
| Heavenly Nights Ltd | Hospitality | 2011 |
| Heavy Everywhere Limited | Administrative & support | 2005 |
| Heavy Reverb Limited | Arts & recreation | 2022 |
| Heavygate Investments Limited | Real estate | 2018 |
| HEB Group Ltd | Professional & scientific | 2019 |
| HEB Group UK Ltd | Construction | 1993 |
| Hebblethwaite & Co Limited | Professional & scientific | 1991 |
| Hebden Investments Ltd | Real estate | 2025 |
| Hebe Anna Limited | Health & social care | 2017 |
| HEC Property Services (Holdings) Ltd | Financial services | 2021 |
| HEC Property Services Limited | Administrative & support | 2002 |
| Hecate Fitness Limited | Arts & recreation | 2025 |
| Hecla Propulsion Ltd | Manufacturing | 2026 |
| Hector and Cedric Limited | Construction | 2006 |
| Hector Creative Limited | Professional & scientific | 2017 |
| Hedehjem Limited | Financial services | 2005 |
| Hedgehog Electrical Services Ltd | Construction | 2017 |
| Hedgehog Homes Limited | Real estate | 2025 |
| Hedgehog Media Ltd | Information & communication | 2010 |
| Hedgeology Limited | Real estate | 2023 |
| Hedgerow Preserves Ltd | Manufacturing | 2016 |
| Hedgerow Publishing Limited | Manufacturing | 1988 |
| Hedley and Partners Ltd | Professional & scientific | 2019 |
| Hedley Consulting Limited | Professional & scientific | 2005 |
| Heel 11 Limited | Real estate | 2014 |
| Heel in Pier Limited | Real estate | 2020 |
| Heeley & Russell Limited | Construction | 2007 |
| Heeley Car Wash Limited | Administrative & support | 2022 |
| Heeley Green Fish Limited | Hospitality | 2024 |
| Heeley Lofts Limited | Construction | 2015 |
| Heeley Surgical Limited | Wholesale & retail | 2008 |
| Heeley Trust | Administrative & support | 1996 |
| Heer BBY Mahno Limited | Wholesale & retail | 2024 |
| Heer by Mann Ltd | Wholesale & retail | 2026 |
| Hefty BOY Limited | Hospitality | 2025 |
| Hegde Solutions Limited | Information & communication | 2024 |
| Hegeman AVE Productions Limited | Professional & scientific | 2022 |
| Hegstrordinary Events Ltd | Hospitality | 2019 |
| Heiberg Investments Limited | Extraterritorial | 2006 |
| Height Safety Essentials Ltd. | Other services | 2018 |
| Heightworx (UK) Ltd | Construction | 2021 |
| Heirloom JMC Holdings Ltd | Real estate | 2020 |
| Heisenberg Capital Limited | Administrative & support | 2007 |
| Heist Craft Ltd. | Wholesale & retail | 2017 |
| Hekla Power Limited | Manufacturing | 2025 |
| Helen Davis Pharmaceutical Services Limited | Health & social care | 2003 |
| Helen Endean Ltd | Health & social care | 2016 |
| Helen Macdonald Limited | Health & social care | 2007 |
| Helen Round Holidays and Travel Ltd | Administrative & support | 2023 |
| Helen Team Ltd | Financial services | 2021 |
| Helen Wallace Ltd | Arts & recreation | 2021 |
| Helen Westmancoat Locums Limited | Health & social care | 2021 |
| Helen’S Mirror Ltd | Other services | 2025 |
| Heli Soloutions Ltd | Transport & logistics | 2025 |
| Helios Pharma Limited | Wholesale & retail | 2012 |
| Helios Tech Ltd | Information & communication | 2016 |
| Heliva Care Ltd | Health & social care | 2026 |
| Helix Energy Ltd | Construction | 2021 |
| Helix Medical Group Ltd | Health & social care | 2022 |
| Hellas Estates Limited | Real estate | 2017 |
| Heller Productions Limited | Arts & recreation | 2022 |
| HELLSDINER666 Limited | Hospitality | 2025 |
| Hellstorm Events Ltd | Administrative & support | 2023 |
| Hellstorm Wargaming Ltd | Wholesale & retail | 2019 |
| Helmway Limited | Real estate | 2002 |
| Helpful Consulting Limited | Information & communication | 2012 |
| Helping Hands 4 YOU Limited | Health & social care | 2024 |
| Helpmehelpmychild.Com Limited | Health & social care | 2015 |
| Helrob Limited | Hospitality | 2004 |
| Helsinki Solutions Limited | Information & communication | 2013 |
| Helvadere Cafe Ltd | Hospitality | 2025 |
| HEM Architects Limited | Professional & scientific | 2015 |
| HEM Lettings Ltd | Real estate | 2025 |
| Hemingway Corporation Limited | Transport & logistics | 2020 |
| Hemingway Property Services Ltd | Construction | 2016 |
| Hemingways Solicitors Limited | Professional & scientific | 2010 |
| Hemming Logistics Ltd | Transport & logistics | 2022 |
| Hemmingham Systems Ltd | Wholesale & retail | 2023 |
| HEN & Chicken Limited | Hospitality | 2019 |
| HEN House (Yorkshire) Limited | Real estate | 2018 |