| Head Space Stores Ltd | Manufacturing | 2024 |
| Healcore Services Ltd | Health & social care | 2025 |
| Healthy Money Mind Ltd | Education | 2021 |
| Heath Heating & Plumbing Limited | Construction | 2015 |
| Heathfield Commercial Interiors Limited | Wholesale & retail | 1988 |
| Heathfield Lessees Limited | Households | 1963 |
| Heathrow Airport Rides Limited | Transport & logistics | 2024 |
| Heating Heroes Limited | Construction | 2016 |
| Heba Investments Ltd | Real estate | 2016 |
| Heddmara Limited | Real estate | 1989 |
| Hedge Electrical Services Limited | Construction | 2005 |
| Helix Partners Limited | Professional & scientific | 2016 |
| Helmut Feder Ltd | Professional & scientific | 2023 |
| Hemming Communications Limited | Information & communication | 2014 |
| Henam Capital Limited | Financial services | 2014 |
| Hendeca Group Limited | Information & communication | 2013 |
| Hennessy Consulting Ltd | Professional & scientific | 2001 |
| Henriettas News Ltd | Wholesale & retail | 2013 |
| Hera Management Agency Limited | Professional & scientific | 2024 |
| Herd's World Ltd | Construction | 2005 |
| Hestia Surveying Services Ltd | Construction | 2024 |
| Hexpol Investments Ltd | Real estate | 2023 |
| Heyheylondon Ltd | Professional & scientific | 2020 |
| HGH Civil Engineering Limited | Construction | 2014 |
| HGH Plant Limited | Administrative & support | 2001 |
| HHA Properties Limited | Real estate | 2022 |
| Hiawatha Investments Limited | Real estate | 2016 |
| Hienergie Ltd | Professional & scientific | 2023 |
| High Beeches (Reigate) Management Limited | Real estate | 1997 |
| High House Farm Estate Management Limited | Real estate | 2024 |
| High Street Lewknor Limited | Construction | 2024 |
| Highfields RTM Company Limited | Households | 2019 |
| Highstead Investments Ltd | Hospitality | 2015 |
| Highverse Limited | Real estate | 1991 |
| Hill Clover Limited | Real estate | 2023 |
| Hill House Drive Management Company Limited | Administrative & support | 1997 |
| Hill House Property Management Limited | Households | 1997 |
| Hillbrow Garden Management Limited | Households | 1961 |
| Hillcrest Advisers Limited | Professional & scientific | 2025 |
| Hillier & Weller Limited | Administrative & support | 2014 |
| Hillview Housing Ltd | Real estate | 2011 |
| Hire to Admire Ltd | Administrative & support | 2025 |
| Historic Doors Limited | Manufacturing | 2021 |
| Historic World Homes Limited | Construction | 2001 |
| History Hospitality Group Ltd | Financial services | 2019 |
| History Office Ltd | Hospitality | 2025 |
| History Talking Limited | Arts & recreation | 2003 |
| HK Horsford Ltd | Hospitality | 2015 |
| Hmjd Consulting Limited | Professional & scientific | 2019 |
| HMR Healthcare Limited | Health & social care | 2020 |
| HN & WM Limited | Wholesale & retail | 2011 |
| Hodel Ltd | Professional & scientific | 2015 |
| Holcrest Limited | Administrative & support | 2005 |
| Holland Coaching Ltd | Professional & scientific | 2019 |
| Hollic Trading Limited | Wholesale & retail | 2019 |
| Holmesdale Aviation Limited | Professional & scientific | 2024 |
| Holmesdale Road Pizza Limited | Hospitality | 2026 |
| Holovara Limited | Manufacturing | 2026 |
| Home Diagnostic Testing Ltd | Health & social care | 2021 |
| Home James Private Hire International Ltd | Transport & logistics | 2026 |
| Home Pride Upholstery Centre Limited | Manufacturing | 1979 |
| Home Words Printing & Publishing Company Limited | Professional & scientific | 1926 |
| Homes and Jardins Limited | Administrative & support | 2011 |
| Hong Kong Fortune Limited | Hospitality | 2023 |
| Hong Konger Limited | Real estate | 2020 |
| Honniball Limited | Other services | 2006 |
| Horizon Business Process Consulting Limited | Professional & scientific | 2015 |
| Horizon Financial Solutions Limited | Financial services | 2003 |
| Horizon Funding Solutions Ltd | Financial services | 2024 |
| Horizon Scientific Limited | Administrative & support | 2024 |
| Horley Road 2 Ltd | Construction | 2024 |
| Horsham Fires & Flues Limited | Construction | 2021 |
| Horus Consulting Limited | Professional & scientific | 2010 |
| Hot Panda Limited | Hospitality | 2024 |
| Hotto Potto Ltd | Hospitality | 2022 |
| Houghton LOY Investments Limited | Real estate | 2026 |
| Houndsley Ltd | Manufacturing | 2017 |
| House of Building Group Limited | Financial services | 2022 |
| House of Building Limited | Construction | 2005 |
| House of Coco Collective Ltd | Other services | 2025 |
| House of Energy Limited | Construction | 2022 |
| House of Natural Brows Ltd | Other services | 2021 |
| HR Partnership Solutions Limited | Professional & scientific | 2026 |
| Hrfc Limited | Hospitality | 2009 |
| HTV Engineering Ltd | Information & communication | 2015 |
| Hub Acquisitions Limited | Professional & scientific | 2010 |
| Hub Digital Solutions Limited | Administrative & support | 2018 |
| Hub Financial Solutions Limited | Administrative & support | 2004 |
| Hub IT Limited | Professional & scientific | 2013 |
| Hub Pension Consulting (Holdings) Limited | Administrative & support | 2016 |
| Hub Pension Consulting Limited | Financial services | 2012 |
| Hub Pension Solutions Limited | Administrative & support | 2016 |
| Hub Transfer Solutions Limited | Administrative & support | 2018 |
| Huddle Sports Ltd | Other services | 2023 |
| Humble at Ltd | Hospitality | 2024 |
| Humblebee Agency Ltd | Wholesale & retail | 2023 |
| Hunseb Accountants Ltd | Professional & scientific | 2023 |
| Hunt Leuchars & Hepburn of London Limited | Professional & scientific | 1955 |
| Huntersfield Close Management Limited | Households | 1967 |
| Hurst-Smith Consulting Ltd | Professional & scientific | 2011 |