| House of Advocacy Ltd | Professional & scientific | 2025 |
| House of Amaya Ltd | Wholesale & retail | 2023 |
| House of Bliss Limited | Wholesale & retail | 2024 |
| House of Bread Ministry | Health & social care | 2020 |
| House of DAE Ltd | Arts & recreation | 2025 |
| House of Eden Holdings Limited | Financial services | 2019 |
| House of Fateh Ltd | Manufacturing | 2018 |
| House of Hyde Ltd | Professional & scientific | 2019 |
| House of LLA Ltd | Wholesale & retail | 2024 |
| House of Marchant Limited | Manufacturing | 2015 |
| House of Rauf Limited | Real estate | 2025 |
| House of Worth Limited | Wholesale & retail | 1999 |
| Houseovgreen Ltd | Wholesale & retail | 2021 |
| Housewife Ltd | Wholesale & retail | 2025 |
| Houzecheck Limited | Information & communication | 2018 |
| Houzecheck Surveying Ltd | Professional & scientific | 2023 |
| Houzzera Ltd | Wholesale & retail | 2017 |
| Howard C RTM Company Limited | Households | 2025 |
| Howard Recovery Ltd | Wholesale & retail | 2025 |
| Howth Investments Limited | Real estate | 2016 |
| Hoxton Blocks Ltd | Manufacturing | 2016 |
| Hoysala Associates Ltd | Information & communication | 2015 |
| Hozan Fresh Fish Limited | Wholesale & retail | 2025 |
| HP Cleaning Services Ltd | Administrative & support | 2025 |
| HP Quantity Surveying Ltd | Professional & scientific | 2022 |
| HP Scaffolding and Rigging Ltd | Construction | 2022 |
| HP Technet Ltd | Information & communication | 2018 |
| HP20 Ltd | Construction | 2026 |
| HP4 Recruitment Ltd | Administrative & support | 2014 |
| Hpcleaning Ltd | Administrative & support | 2025 |
| HPJ Engineering Ltd | Professional & scientific | 2016 |
| HPK Group Ltd | Hospitality | 2021 |
| Hpos Solution Ltd | Construction | 2010 |
| Hqcglobal Limited | Professional & scientific | 2014 |
| HR and Admin Ltd | Administrative & support | 2019 |
| HR Ecom Ltd | Wholesale & retail | 2024 |
| HR Inner Circle Limited | Information & communication | 2011 |
| HR Vertex Holding Ltd | Financial services | 2026 |
| HRD Retail Limited | Wholesale & retail | 2019 |
| Hriidham Ltd | Professional & scientific | 2021 |
| Hrishan Consultancy Ltd | Professional & scientific | 2016 |
| HRK Consulting Ltd | Professional & scientific | 2026 |
| HRM Steel Ltd | Construction | 2026 |
| Hrrs Consulting Limited | Information & communication | 2023 |
| Hsam Group Ltd | Administrative & support | 2025 |
| Hseh Limited | Extraterritorial | 2020 |
| HSI Chambers Ltd | Professional & scientific | 2025 |
| HSJ Case Management Services Ltd | Health & social care | 2023 |
| Htec Consultancy Ltd | Information & communication | 2018 |
| HTF Consulting Limited | Administrative & support | 2014 |
| Htms-Ppfa (International) CIC | Education | 2023 |
| Hub 4 Careers Ltd | Administrative & support | 2021 |
| Hub Workspace 1 Ltd | Real estate | 2025 |
| Hub Workspace 2 Ltd | Real estate | 2025 |
| Hubble IT Tech Limited | Information & communication | 2015 |
| Hubeco Ltd | Construction | 2024 |
| Huck & Berry Limited | Hospitality | 2020 |
| Huckley Homes Limited | Real estate | 2019 |
| Hudson Properties Management Limited | Real estate | 2023 |
| Huebner Development Ltd | Information & communication | 2019 |
| Huggett Engineering Limited | Construction | 2017 |
| Hugh Stirling Consultancy Ltd | Information & communication | 2011 |
| Hughes Group Plumbing & Heating Limited | Construction | 2016 |
| Hughes Transport Services Ltd | Wholesale & retail | 2025 |
| Hulme Project Management Limited | Construction | 2009 |
| Humain Engineering Ltd | Information & communication | 2026 |
| Hume Enterprises Limited | Information & communication | 2005 |
| Humgor Limited | Manufacturing | 2017 |
| Humming Bird Motor Cycles (Watford) Limited | Real estate | 1962 |
| Hummingbird Airborne Data Specialists Limited | Information & communication | 2018 |
| Hummingbird Consultancy Group Limited | Real estate | 2025 |
| Hummingbird Fitness Limited | Education | 2025 |
| Humnah Abdullah Productions Ltd | Arts & recreation | 2024 |
| HUMO28 Ltd | Hospitality | 2026 |
| Hunnybun Records Limited | Arts & recreation | 2019 |
| Hunt Bros. (Oldbury) Limited | Professional & scientific | 1919 |
| Hunt Rehab Limited | Health & social care | 2025 |
| Hunter and Page Limited | Information & communication | 2019 |
| Hunters Estate Agents Limited | Real estate | 2013 |
| Hunters Estate and Property Management Ltd | Real estate | 1991 |
| Hunters Lettings Ltd | Real estate | 2000 |
| Hunzas Automation & Engineering UK Limited | Wholesale & retail | 2024 |
| Hurlingham Smith Limited | Administrative & support | 2016 |
| Hursey Installations Ltd | Construction | 2025 |
| Huskimo Ltd | Transport & logistics | 2020 |
| Huyen Head Spa Ltd | Other services | 2025 |
| HV Substation Services Ltd | Manufacturing | 2026 |
| HV Testy Bites Ltd | Hospitality | 2023 |
| Hvar Consultancy Ltd | Professional & scientific | 2015 |
| HVL Accountants Ltd | Extraterritorial | 2023 |
| HVS Group Limited | Financial services | 2026 |
| HW Accountants Ltd | Professional & scientific | 2017 |
| HWG Estates LLP | | 2025 |
| Hxll Property Group Ltd | Construction | 2025 |
| HY Medical Services Ltd | Health & social care | 2026 |
| Hybrid Reality Management Ltd | Arts & recreation | 2021 |
| Hyda Health Limited | Health & social care | 2026 |
| Hyde Affordable Homes Limited | Real estate | 2026 |
| Hydra Property Services Ltd | Real estate | 2012 |
| Hydrgn Properties Ltd | Real estate | 2025 |