| HG Home Solutions Ltd | Construction | 2021 |
| HH Barakah Limited | Real estate | 2023 |
| HHP Investments Limited | Construction | 2024 |
| HHP Residential Investments Limited | Real estate | 2025 |
| HI Heels Limited | Other services | 2002 |
| HI-BIKE4U Ltd | Wholesale & retail | 2021 |
| Hi-Speed Towing Limited | Transport & logistics | 2025 |
| Hickman Transport Limited | Extraterritorial | 2006 |
| Hideaway Cottages (Surrey) Ltd | Real estate | 2022 |
| High Quality Care.Co.Uk Limited | Administrative & support | 2015 |
| High Quality Education Ltd | Education | 2023 |
| Highfield Lawns,Limited | Other services | 1913 |
| Highier Level Accountants Limited | Professional & scientific | 2025 |
| Highland Wheat Ltd | Wholesale & retail | 2017 |
| Highlands Energy Limited | Energy | 2009 |
| Highway Developments Limited | Real estate | 1960 |
| Hillard House Ltd | Arts & recreation | 2026 |
| Hillbury (Warlingham) Developments Limited | Construction | 2017 |
| Hillcroft CC Ltd | Wholesale & retail | 2016 |
| Hillman Design Limited | Professional & scientific | 2004 |
| Hills Plastering Services Ltd | Construction | 2020 |
| Hillview Properties (UK) Ltd | Real estate | 2003 |
| Himba Luxury Fragrances London Ltd | Wholesale & retail | 2023 |
| Hirani RAX Ltd | Information & communication | 2022 |
| Hire a Student Limited | Information & communication | 2021 |
| Hirsen Limited | Construction | 2015 |
| HIS Consulting Limited | Information & communication | 2025 |
| Hitech Powersystems Limited | Wholesale & retail | 1995 |
| HJW Therapy Ltd | Other services | 2025 |
| HK Architecture Ltd | Professional & scientific | 2024 |
| HM Beaute Ltd | Other services | 2024 |
| HMB Consulting Services Limited | Administrative & support | 2024 |
| HMH Business Development & Management Company Limited | Other services | 2019 |
| Hmhy Investment Ltd | Real estate | 2023 |
| Hmlm Trading Limited | Wholesale & retail | 2024 |
| HMR 6 Ltd | Construction | 2025 |
| HMR Services Ltd | Construction | 2021 |
| HNM Motors Ltd | Wholesale & retail | 2020 |
| HNS Electrical Limited | Construction | 2021 |
| HNS Housing Limited | Real estate | 2025 |
| HNS Property Solutions Ltd | Construction | 2024 |
| Hoads Farm Track Limited | Households | 2023 |
| Hobbes Mcginty Media Ltd | Financial services | 2018 |
| HOC Theatre Ltd | Administrative & support | 2024 |
| Hoff Beards Limited | Manufacturing | 2018 |
| Hoiho Engineering Ltd | Administrative & support | 2009 |
| Holden Brickwork Ltd | Construction | 2016 |
| Holden Ward Property Limited | Real estate | 2019 |
| Hole in the Sleeve Game Studios Limited | Information & communication | 2021 |
| Holfam Ltd | Health & social care | 2015 |
| Holigays Central Ltd | Information & communication | 2020 |
| Holistic Nutrition Limited | Health & social care | 2022 |
| Holistic Psychology Practice Limited | Health & social care | 2024 |
| Holistica London Ltd | Health & social care | 2025 |
| Hollands Heating & Plumbing Limited | Construction | 2007 |
| Holmes CR Electrics Limited | Manufacturing | 2018 |
| Home Care & Rehab Limited | Health & social care | 2016 |
| Home Care Home Limited | Health & social care | 2007 |
| Home Cool Ltd. | Real estate | 1997 |
| Home House Interiors Limited | Wholesale & retail | 2025 |
| Home Reach Developments Ltd. | Real estate | 2003 |
| Home Republic Limited | Construction | 2012 |
| Home Residential EPC Ltd | Professional & scientific | 2024 |
| Homefield Preparatory School Trust Limited | Education | 1966 |
| Homegrown Properties Ltd | Real estate | 2021 |
| Homes Forever Ltd | Real estate | 2017 |
| HOMES4LET Property Services Ltd | Administrative & support | 2015 |
| Homestay Direct Limited | Hospitality | 2014 |
| Homeunit Group Ltd | Hospitality | 2021 |
| Homeunit Sourcing & Management Ltd | Real estate | 2022 |
| Homeunit Training & Consulting Ltd | Professional & scientific | 2022 |
| Homewood Delights Limited | Wholesale & retail | 2020 |
| Honeyliver Group Ltd | Other services | 2025 |
| Honeysuckle Enterprises Limited | Real estate | 1987 |
| Hong Kong Arts UK CIC | Arts & recreation | 2025 |
| Hong Kong Tea Company Ltd | Manufacturing | 2021 |
| Hope Alive Ltd | Other services | 2024 |
| Hope and Dreams Beauty Limited | Other services | 2021 |
| Hopestead Management Ltd | Information & communication | 2010 |
| Horizon Court (Cheam) Management Company Limited | Households | 2006 |
| Horizon Financial Solutions Holdings Ltd | Financial services | 2025 |
| Horizon Leadership Consulting Ltd | Professional & scientific | 2025 |
| Hornbil Ltd | Wholesale & retail | 2021 |
| Horox Communications Limited | Administrative & support | 2009 |
| Horox Properties Limited | Real estate | 2023 |
| Horton Electrical Wholesale Limited | Wholesale & retail | 1950 |
| Horton Lighting Limited | Wholesale & retail | 2007 |
| Hosecastle Limited | Real estate | 2012 |
| Hoshi House Ltd | Manufacturing | 2026 |
| Hospitalist Ltd | Health & social care | 2018 |
| Hot Melt Roofing Specialists Ltd | Construction | 2017 |
| Hourly Solutions Ltd | Information & communication | 2017 |
| House Base Construction Limited | Construction | 2015 |
| House Full of Trendz Limited | Wholesale & retail | 2024 |
| House of Healthcare Limited | Information & communication | 2023 |
| House of Kaila's Ltd | Hospitality | 2021 |
| House Pamper Ltd | Construction | 2024 |
| House Rescue Limited | Real estate | 2024 |
| HOUSE4YOU Ltd | Real estate | 2022 |
| Housebrands Limited | Administrative & support | 2007 |