| Headstocks Cinema CIC | Arts & recreation | 2024 |
| Headway (Hair Salon) Limited | Other services | 2002 |
| Healing Hearts Residential Ltd | Health & social care | 2025 |
| Healthbridgeuk Ltd | Professional & scientific | 2026 |
| Heat Exchanger Services ( Midlands) Limited | Professional & scientific | 2005 |
| Heat Guard Windows Limited | Construction | 2006 |
| Heat Pumps Made Easy Ltd | Construction | 2024 |
| Heath Electrical Services Limited | Construction | 2013 |
| Heath One Ltd | Real estate | 2025 |
| Heath Village PUB Company Limited | Hospitality | 2004 |
| Heathcote Future Connections Limited | Extraterritorial | 2010 |
| Heathcotes (Southern) Limited | Health & social care | 2016 |
| Heathcotes Care (Head Office) Limited | Professional & scientific | 2022 |
| Heathcotes Care Limited | Health & social care | 2004 |
| Heathcotes CS Limited | Health & social care | 2017 |
| Heathcotes Head Office Limited | Professional & scientific | 2020 |
| Heathcotes Limited | Health & social care | 2008 |
| Heathcotes M Limited | Health & social care | 2013 |
| Heathcotes PD Limited | Health & social care | 2014 |
| Heathcote’S Property Development Ltd | Construction | 2026 |
| Heather Kemp Limited | Extraterritorial | 2024 |
| Heathrow Minibus Ltd | Transport & logistics | 2020 |
| Heathwells Legal Services Limited | Professional & scientific | 2026 |
| Heaven’S Edge Properties Ltd | Real estate | 2025 |
| Heeley Construction Ltd | Construction | 2021 |
| Hegenscheidt MFD (UK) Limited | Administrative & support | 2007 |
| Helen Othen Fire Safety Limited | Professional & scientific | 2024 |
| Helios 7 Energy Systems UK Limited | Manufacturing | 2018 |
| Helios Trade Services Limited | Administrative & support | 2015 |
| Hellesveor ST Ives Holidays Limited | Hospitality | 2023 |
| Hello Social Avenue Ltd | Information & communication | 2022 |
| HELPINGU2SAVE Ltd | Wholesale & retail | 2011 |
| HEN RBS Trustees Ltd. | Professional & scientific | 2016 |
| Henley Capital Ltd | Administrative & support | 2010 |
| Henmoor Court Management Company Limited | Households | 2016 |
| Henry Homes Investments Ltd | Real estate | 2025 |
| Henry Pumps Limited | Wholesale & retail | 2022 |
| Henry Thomas Limited | Arts & recreation | 2013 |
| Henry's Estate Agents Limited | Construction | 2016 |
| Henson & SON Scaffolding Ltd | Administrative & support | 2019 |
| Henson Civils Ltd | Extraterritorial | 2018 |
| Henton Contractors Ltd | Construction | 2013 |
| Henton Hire Ltd | Administrative & support | 2023 |
| HER Soul Limited | Wholesale & retail | 2025 |
| Heraeus Electro-Nite (UK) Ltd | Manufacturing | 1989 |
| Heritage Hot Tubs Ltd | Other services | 2025 |
| Herleva Maintenance (South) Limited | Real estate | 2021 |
| Hermes Care Ltd | Health & social care | 2010 |
| Hero Pubs Ltd | Hospitality | 2023 |
| Heronbrook Estate Limited | Extraterritorial | 2024 |
| Herondale Homes Ltd | Real estate | 2020 |
| Herrington Property Limited | Construction | 1997 |
| Hewkin Interiors Ltd | Construction | 2011 |
| Heyday Clinic Ltd | Health & social care | 2024 |
| Heywood Estates Ltd | Real estate | 2010 |
| Heywood Plant Hire Co.Limited | Agriculture & fishing | 1952 |
| Hhw+G Limited | Extraterritorial | 2017 |
| HI Blackpool Ltd | Real estate | 2017 |
| Hi-Tech Welding & Fabrication Limited | Manufacturing | 2001 |
| Hickey Holdings Ltd | Real estate | 2025 |
| Hickey Property Holdings Ltd | Real estate | 2022 |
| Hidden Horizons MX Ltd | Administrative & support | 2022 |
| Higg Engineering Services Ltd | Professional & scientific | 2024 |
| High Ashes Haven Ltd | Hospitality | 2021 |
| High Ashes Rural Project C.I.C. | Health & social care | 2014 |
| High Care Medical Ltd | Health & social care | 2022 |
| High Court (Matlock) Limited | Households | 1982 |
| High Growth Playbooks Limited | Professional & scientific | 2025 |
| High Spirit Ceilings Limited | Construction | 1999 |
| High Street Garage (Bolsover) Limited | Wholesale & retail | 2003 |
| High Street Town House Limited | Hospitality | 2022 |
| High Tech Greens Ltd | Manufacturing | 2022 |
| High TOR Hotel Limited | Hospitality | 2019 |
| Highbury Grove (Chesterfield) Management Company Limited | Real estate | 2011 |
| Highfield Farm MC 2 Limited | Households | 2022 |
| Highfield Farm MC Limited | Households | 2022 |
| Highfield Mortgages Ltd | Financial services | 2019 |
| Highfield Property Ltd | Real estate | 2016 |
| Highlightley Investments Limited | Financial services | 2023 |
| Highticketboss (HTB) Consult Ltd | Information & communication | 2022 |
| Hightopp Creations Ltd | Administrative & support | 2025 |
| Highway Design & Build Ltd | Construction | 2015 |
| Highway Property Ltd | Real estate | 2020 |
| Highwire Testing Services Limited | Administrative & support | 2002 |
| Hill and Hill Design Ltd | Wholesale & retail | 2010 |
| Hill Care 1 Limited | Health & social care | 2010 |
| Hill Care 2 Limited | Professional & scientific | 2011 |
| Hill Care 3 Limited | Health & social care | 2011 |
| Hill Care Holdings Limited | Financial services | 2014 |
| Hill Care Limited | Health & social care | 2001 |
| Hill Care Services Limited | Health & social care | 2019 |
| Hill Group Solar Limited | Financial services | 2026 |
| Hill House Mansfield Ltd | Real estate | 2014 |
| Hill Speed Racing Limited | Wholesale & retail | 1996 |
| Hillhouse Property Lettings Ltd | Real estate | 2020 |
| Hilltop Engineers Ltd | Professional & scientific | 2019 |
| Hilton Driving Services Ltd | Transport & logistics | 2023 |
| Hind Feet Resourcing Limited | Administrative & support | 2025 |
| Hind Feets Resourcing Limited | Administrative & support | 2025 |
| Hind Michael 0965 Limited | Transport & logistics | 2014 |