| Havenly Home Care Ltd | Health & social care | 2023 |
| Havensmith Properties Ltd | Real estate | 2020 |
| Hawken Consultants Ltd | Professional & scientific | 2025 |
| Hawkeye Films Ltd | Information & communication | 2016 |
| Hawthorn Support Limited | Administrative & support | 2022 |
| Hayat 73 Ltd | Hospitality | 2026 |
| HB Sports Surrey Ltd | Arts & recreation | 2019 |
| HBE Consulting Ltd | Construction | 2022 |
| Hccl Limited | Construction | 2015 |
| HCP Automotive Limited | Professional & scientific | 2021 |
| HCP Group Limited | Professional & scientific | 2018 |
| HCP International Limited | Administrative & support | 2007 |
| HCP Support Services Limited | Administrative & support | 2018 |
| HDK Advisory Ltd | Financial services | 2025 |
| HDL Holdings Limited | Hospitality | 2024 |
| Health Clarity UK Limited | Health & social care | 2026 |
| Health Tourism UK Ltd | Administrative & support | 2018 |
| Healthier Supplements Limited | Hospitality | 2025 |
| Healthy Green Homes Limited | Construction | 2021 |
| Heart & Needle Ltd | Wholesale & retail | 2025 |
| Heart Team Ltd | Health & social care | 2021 |
| Heathwest Systems Limited | Information & communication | 2007 |
| Heavenly Foodie Limited | Hospitality | 2024 |
| Hedgiehealthcare Ltd | Public administration | 2020 |
| Heidleigh Property Services Limited | Construction | 2013 |
| Heisel Property Ltd | Construction | 2022 |
| Helin Fastfood Ltd | Hospitality | 2026 |
| Helin Label Ltd | Manufacturing | 2019 |
| Hellene School Travel Limited | Administrative & support | 2020 |
| Hemera Properties Ltd | Real estate | 2024 |
| Hengest Farm Services Limited | Agriculture & fishing | 2018 |
| Herald Finance Limited | Real estate | 2020 |
| Heritage Surveys Limited | Administrative & support | 2009 |
| Heron Park Limited | Wholesale & retail | 2020 |
| Hertfordshire Security Installations Limited | Administrative & support | 2003 |
| Hessian Empdt Limited | Information & communication | 2002 |
| Heurism Technologies Ltd | Wholesale & retail | 2024 |
| Heycloud Ltd | Information & communication | 2022 |
| Highdata Limited | Information & communication | 2023 |
| Highland Realty Limited | Real estate | 2024 |
| Highsaints Limited | Wholesale & retail | 2025 |
| Highway and Drainage Construction Ltd | Construction | 2017 |
| Hikmat Limited | Information & communication | 2021 |
| Hill Rise (Croydon) Management Company Limited | Real estate | 1962 |
| Hill Textiles Europe Ltd | Wholesale & retail | 2020 |
| Himan Fast Food Ltd | Hospitality | 2023 |
| Hindu Security Group (UK) Ltd | Other services | 2023 |
| Hindu Security Group Ltd | Other services | 2020 |
| Hippo and Monkey Property Limited | Real estate | 2025 |
| Hiraya Ltd | Health & social care | 2022 |
| Hitchin Priory Development Limited | Construction | 2025 |
| Hive and Seek Ltd | Professional & scientific | 2020 |
| Hive Design Studio & Events Limited | Wholesale & retail | 2024 |
| HJD Investments Limited | Construction | 2022 |
| HJS Transformation Limited | Professional & scientific | 2018 |
| HM Change Consult Ltd | Information & communication | 2015 |
| Hockley Holdings Limited | Real estate | 1983 |
| HOD Perfumes Limited | Manufacturing | 2014 |
| Hoffman Gardens Management Limited | Hospitality | 2005 |
| Hogarth Associates Ltd | Professional & scientific | 2016 |
| Holda Kebab Limited | Hospitality | 2024 |
| Holiday Venture Limited | Administrative & support | 2025 |
| Holistic Consulting Limited | Professional & scientific | 2005 |
| Holistic Group Holdings Ltd | Financial services | 2021 |
| Holly Gillian Brown Ltd | Other services | 2025 |
| Holme Stuff Ltd | Education | 2026 |
| Holmesdale Developments Ltd | Construction | 2025 |
| Holmesdale Electrical Services Ltd | Administrative & support | 2016 |
| Home County Fire Caterham Limited | Manufacturing | 2013 |
| Home Exposure Limited | Professional & scientific | 2011 |
| Home Regen Limited | Construction | 2017 |
| Home&Warm Limited | Real estate | 2014 |
| Homecare That Matters Ltd | Health & social care | 2025 |
| Homefree Ltd | Real estate | 2019 |
| Homeleigh Care Limited | Health & social care | 2002 |
| Homesstar Ltd | Real estate | 2024 |
| Honestas Bookkeeping & Financial Consultancy Ltd | Professional & scientific | 2021 |
| Honey Blush PMU Ltd | Other services | 2026 |
| Hooked Theatre Limited | Arts & recreation | 2018 |
| Hoopstar Theatrical Ltd | Arts & recreation | 2023 |
| Hoot Creative Limited | Information & communication | 2017 |
| Hopespring Care Ltd | Health & social care | 2026 |
| Hornbeam Express Limited | Hospitality | 2025 |
| Horsch Project Management Ltd | Professional & scientific | 2009 |
| Horseman Homes Ltd | Construction | 2006 |
| Hosttronics Limited | Information & communication | 2017 |
| Hot Leads Ltd | Administrative & support | 2017 |
| Hour Shop Limited | Hospitality | 2025 |
| House of Horsa Ltd | Wholesale & retail | 2013 |
| House Radiology Limited | Health & social care | 2012 |
| House Removal Services Limited | Transport & logistics | 2025 |
| Housebuilding Limited | Construction | 2017 |
| Howard Hall Consulting Limited | Administrative & support | 2012 |
| Howes Builders Limited | Construction | 2009 |
| Howlett Health & Safety Services Limited | Professional & scientific | 2010 |
| HQ Access Ltd | Construction | 2025 |
| HQ Cutz (UK) Ltd | Other services | 2019 |
| HRK Lakaz Properties Ltd | Real estate | 2025 |
| HS Accountants and Consultants Limited | Professional & scientific | 2021 |
| HS North Oxford Limited | Real estate | 2022 |