| Green Shoot Media Ltd | Information & communication | 2020 |
| Green Vibe Ltd | Real estate | 2018 |
| Green World Property Invest Ltd | Real estate | 2021 |
| Green World Property Trade Ltd | Financial services | 2018 |
| Greencheck Assure Limited | Professional & scientific | 2023 |
| Greenfield Neighbours Ltd | Real estate | 2022 |
| Greybridge Media Ltd | Professional & scientific | 2025 |
| Groundworks 95 Ltd | Construction | 2010 |
| Groundworks 95 Property Limited | Real estate | 2014 |
| Grovehurst Holdings Ltd | Real estate | 2024 |
| Grow High Academy Ltd | Professional & scientific | 2026 |
| Growing Green Tree Ltd | Financial services | 2021 |
| Growth Consulting Group Ltd | Hospitality | 2023 |
| Growthforge Management LLP | | 2025 |
| GRT Global Ltd | Wholesale & retail | 2024 |
| Grubhub LT Ltd | Hospitality | 2025 |
| GSL-24 Ltd | Construction | 2024 |
| GTM Property Invest Ltd | Real estate | 2023 |
| GU Green Union Ltd | Agriculture & fishing | 2022 |
| Guards Polo Club Holdings Limited | Arts & recreation | 2002 |
| Gulistan Charcoal Grill Ltd | Hospitality | 2016 |
| GW Lighting Ltd | Manufacturing | 2021 |
| GX Pet Help Ltd | Other services | 2024 |
| GZ Charge Ltd | Manufacturing | 2022 |
| GZ Travel Ltd | Transport & logistics | 2022 |
| H F Hill Enterprises Limited | Administrative & support | 2009 |
| H G Refurbishments Ltd | Real estate | 2025 |
| H Hobbs Construction Ltd | Construction | 2014 |
| H&W REALESTATE2024 Ltd | Real estate | 2024 |
| H. Baramo & E. Darwich Ltd | Real estate | 2019 |
| H2 Consulting Limited | Professional & scientific | 2004 |
| Hagley Care Home Holdings Limited | Financial services | 2019 |
| Hagley Care Home Limited | Construction | 2016 |
| Hagley Care Limited | Health & social care | 2019 |
| Hags-Smp Limited | Construction | 1967 |
| Hajan Ltd | Professional & scientific | 2025 |
| Hala Engineering Ltd | Manufacturing | 2026 |
| Half a Car Limited | Real estate | 2008 |
| Halfway House Limited Partnership | | 1993 |
| Hallmark Auditing & Accounting Ltd | Professional & scientific | 2019 |
| Hamble Foods Limited | Other services | 2019 |
| Hammer House Forge Limited | Administrative & support | 2013 |
| Hampton Care Home Holdings Limited | Financial services | 2019 |
| Hampton Care Home Limited | Real estate | 2018 |
| Hampton Care Services Limited | Health & social care | 2019 |
| Hampton Heath Ltd | Real estate | 2017 |
| Hamswood Management Ltd | Professional & scientific | 2024 |
| Hannah Furrer Ltd | Professional & scientific | 2023 |
| Hanslink Ltd | Real estate | 2020 |
| Hanson Hoarding Ltd | Construction | 2024 |
| Hants and Surrey Garden Rooms Ltd | Manufacturing | 2024 |
| Happily Ever TV Ltd | Information & communication | 2023 |
| Happy & Healthy Environment Ltd | Professional & scientific | 2022 |
| Hardwick Court Fishburn Ltd | Construction | 2024 |
| Harlequin Housing Ltd | Real estate | 2017 |
| Harpay Development Limited | Construction | 2018 |
| Hart Software Limited | Information & communication | 2025 |
| Hartco Property Company Limited | Real estate | 2018 |
| Hartwood Care (2) Limited | Real estate | 2013 |
| Hartwood Care (2) Subco Limited | Professional & scientific | 2025 |
| Hartwood Care (3) Limited | Real estate | 2013 |
| Hartwood Care (3) Subco Limited | Professional & scientific | 2025 |
| Hartwood Care (4) Limited | Real estate | 2014 |
| Hartwood Care (4) Subco Limited | Professional & scientific | 2025 |
| Hartwood Care Limited | Real estate | 2010 |
| Hartwood Care Subco Limited | Professional & scientific | 2025 |
| Harvard Park Day Nursery Limited | Education | 2008 |
| Harvey Higher Ltd | Administrative & support | 2024 |
| Hasaroo Ltd | Construction | 2020 |
| Hastr Property Ltd | Real estate | 2026 |
| Haus Investments Ltd | Real estate | 2018 |
| Hawthorne Close Management Company Ltd | Households | 2021 |
| HCE Medical Group Limited | Financial services | 2013 |
| HCLO6 Limited | Hospitality | 2025 |
| Hcloe Limited | Hospitality | 2025 |
| Health and ED Limited | Administrative & support | 2012 |
| Health Media 24 Ltd | Information & communication | 2023 |
| Health Point Media Ltd | Professional & scientific | 2025 |
| Health-Care Equipment and Supplies Co Ltd | Wholesale & retail | 2001 |
| Healthcare Diagnostics Limited | Professional & scientific | 2012 |
| Healthspan Media Ltd | Professional & scientific | 2024 |
| Healthwise Ltd | Professional & scientific | 2026 |
| Healthy & Wellthy Motion Sports Ltd | Financial services | 2020 |
| Heartguard Limited | Health & social care | 2025 |
| Heartsforgood Ltd | Other services | 2024 |
| Heat-Pro Limited | Construction | 2011 |
| Heathrow Logistics Private Limited | Transport & logistics | 2021 |
| Heaven Beauty Boutique Staines Limited | Extraterritorial | 2016 |
| Heaven Beauty Boutique Virginia Water Limited | Other services | 2016 |
| Heaven Beauty Boutiques Limited | Other services | 2012 |
| Heca Capital Management Ltd | Professional & scientific | 2022 |
| Heel Real Estate Ltd | Real estate | 2023 |
| Hekron Estates Ltd | Real estate | 2024 |
| Heldalie LLP | | 2020 |
| Helros LLP | | 2020 |
| Helsing Housing Ltd | Real estate | 2020 |
| Hendor LLP | | 2020 |
| Herbavedalab Ltd | Professional & scientific | 2024 |
| Heroes for Hire Ltd | Extraterritorial | 2011 |
| Herts and Essex Garden Rooms Ltd | Construction | 2023 |