| Holland Neurosurgical Services Ltd | Health & social care | 2019 |
| Hollies END Investments Limited | Real estate | 2022 |
| Hollin Financial Limited | Professional & scientific | 2015 |
| Holly Moore Events Limited | Arts & recreation | 2018 |
| Hollychase Property Management Limited | Households | 2006 |
| Holm Oak Therapy Limited | Health & social care | 2019 |
| Holme Health Ltd | Health & social care | 2025 |
| Holmes & Holmes Homes Ltd | Construction | 2017 |
| Holmes Freehold Limited | Real estate | 2022 |
| Holmes Medical Supplies Limited | Health & social care | 2017 |
| Holmes Practice Limited | Health & social care | 2019 |
| Holtbeck Construction Ltd | Construction | 2018 |
| Holtbeck Ltd | Real estate | 2018 |
| Holy Family Private Limited | Wholesale & retail | 2025 |
| Home Building Company (Cheshire) Limited | Construction | 2013 |
| Homebird Furniture & Home Accessories Limited | Wholesale & retail | 2008 |
| Homebird Group Ltd | Wholesale & retail | 2013 |
| Homebird Interiors Ltd | Wholesale & retail | 2008 |
| Homebird Online Ltd | Wholesale & retail | 2019 |
| Homebird ST Annes Ltd | Wholesale & retail | 2021 |
| Homed Exile Ltd | Administrative & support | 2026 |
| Homelyme House RTM Company Limited | Households | 2025 |
| Homepen Company Ltd | Real estate | 2023 |
| Homes for Support Ltd | Health & social care | 2010 |
| Homeshareuk Property Management Ltd | Real estate | 2021 |
| Homespring House RTM Company Ltd | Professional & scientific | 2020 |
| Homestyle Property and Lifestyle Limited | Real estate | 2019 |
| Hopecrest Holdings Limited | Professional & scientific | 1988 |
| Hopecrest Investments (Crewe) Limited | Financial services | 2020 |
| Hopper Anaesthesia Ltd | Health & social care | 2018 |
| Hopwood Enterprises Limited | Real estate | 2000 |
| Horizon BLU Ltd | Real estate | 2022 |
| Hormonal Harmony Clinic London Limited | Education | 2024 |
| Horse Riders Union Ltd | Other services | 2018 |
| Horseracing Analytics Ltd | Other services | 2024 |
| Horticon Holdings Ltd | Real estate | 2020 |
| Horticultural Services Limited | Other services | 2003 |
| Horton Consultancy Ltd | Professional & scientific | 2020 |
| Hough Hall Properties Limited | Real estate | 2011 |
| Houghton Grange Management Company Limited | Households | 2022 |
| Hous of Paws Ltd | Other services | 2025 |
| House of Cans Ltd | Hospitality | 2019 |
| House of Pomerania Ltd | Extraterritorial | 2022 |
| Houseofrompa Limited | Extraterritorial | 2013 |
| Houseworks Limited | Real estate | 2018 |
| Housing Freedom LLP | | 2017 |
| Howel Ltd | Health & social care | 2022 |
| HQ Solutions Group Ltd | Construction | 2020 |
| HR Solutions (Hospitality) Ltd | Professional & scientific | 2022 |
| Hrwg Ltd | Real estate | 2025 |
| HS 346 Limited | Information & communication | 2004 |
| HS Direct Limited | Information & communication | 2004 |
| HS Tareen Ltd | Real estate | 2023 |
| Hsda Consulting Ltd | Professional & scientific | 2026 |
| Htec Solutions Ltd | Information & communication | 2018 |
| HTM Authorising Services Limited | Professional & scientific | 2014 |
| Huark Scheduling Ltd | Professional & scientific | 2025 |
| Hub & Health at 27 Ltd | Hospitality | 2025 |
| Hucosa Medical Services Limited | Health & social care | 2015 |
| Hugglescote Grange (Coalville) Management Company Limited | Households | 2023 |
| Hugohire Limited | Administrative & support | 2024 |
| Hugr Homes Limited | Construction | 2018 |
| Humilitas Limited | Financial services | 2025 |
| Huneo Consulting Limited | Administrative & support | 2026 |
| Hunstons Limited | Financial services | 2019 |
| Hunter Orthopaedics Limited | Health & social care | 2021 |
| Hurst Contracts Ltd | Construction | 2009 |
| Hutchings Engineering Support Limited | Professional & scientific | 2009 |
| Hutchinson 74 Holding Limited | Professional & scientific | 2019 |
| HW Digital Consulting Limited | Professional & scientific | 2024 |
| Hydracaddie Limited | Wholesale & retail | 2024 |
| Hydrants Direct Limited | Public administration | 2018 |
| Hydraulic Equipment Supermarkets Limited | Professional & scientific | 1965 |
| Hydravalve UK Limited | Extraterritorial | 2017 |
| Hyknusa Medical Solutions Ltd | Health & social care | 2020 |
| Hypercars Limited | Extraterritorial | 2005 |
| Hyphen Studio Limited | Manufacturing | 2023 |
| HYS Medical Limited | Health & social care | 2022 |
| I & M Partners Limited | Hospitality | 2024 |
| I & V Homes Ltd | Real estate | 2022 |
| I H Syed Limited | Health & social care | 2024 |
| I Lewis Holdings Limited | Financial services | 2018 |
| I Need a Prescription Ltd | Health & social care | 2024 |
| I T Redmond Limited | Health & social care | 2014 |
| I-Ent Limited | Health & social care | 2016 |
| I-Metering Ltd | Information & communication | 2011 |
| I.C.E.Arch Limited | Professional & scientific | 2009 |
| I.D.D.E.A. Ltd | Construction | 2007 |
| Iamhemp Ltd | Water & waste | 2019 |
| IAN James Limited | Real estate | 2025 |
| IAN M Smith Plastic Surgery Limited | Health & social care | 2020 |
| IAN Park Consulting Ltd | Professional & scientific | 2023 |
| IAN Taylor Occupational Health Limited | Health & social care | 2023 |
| Iasset Ltd | Professional & scientific | 2022 |
| Ice Galleries Limited | Wholesale & retail | 2020 |
| Icis Design Limited | Professional & scientific | 2013 |
| Icon Marketing Communications Ltd | Professional & scientific | 2019 |
| Iconicdent Ltd | Health & social care | 2025 |
| ICR Futures Limited | Transport & logistics | 2021 |
| Icreft Ltd | Administrative & support | 2023 |