| Gamble Trading Ltd | Other services | 2019 |
| GAO GAO GAO Limited | Agriculture & fishing | 2007 |
| Garden Revolution Ltd | Administrative & support | 2010 |
| Gary Downie Ltd | Construction | 2016 |
| GDH Car Sales Ltd | Wholesale & retail | 2025 |
| Gemlog Controls Limited | Wholesale & retail | 1994 |
| Genesoft Limited | Wholesale & retail | 1999 |
| Gentleway Community Care Limited | Health & social care | 2020 |
| Gentleway Global Immigration Ltd | Administrative & support | 2026 |
| George Hannah Ltd | Construction | 2014 |
| Geoscience Group Ltd | Professional & scientific | 2020 |
| Gibson Gammon Residential Lettings Ltd. | Real estate | 2002 |
| Gjones Plastering Limited | Other services | 2013 |
| Glazed Expressions Limited | Extraterritorial | 1983 |
| Glenhart Properties Limited | Real estate | 1989 |
| Global Aviation Network Limited | Professional & scientific | 2025 |
| Global Aviation People Limited | Professional & scientific | 2025 |
| Global Botanical Sciences Ltd | Manufacturing | 2025 |
| Goalive Ltd | Administrative & support | 2019 |
| Godberry Landscapes Ltd | Administrative & support | 2023 |
| Goldlane Limited | Professional & scientific | 2003 |
| Good Intentions Pictures Ltd | Information & communication | 2025 |
| GPH Construction Limited | Construction | 2005 |
| Gpheating Ltd | Construction | 2020 |
| Graham Amphlett Ltd | Professional & scientific | 2019 |
| Graham Curtis and Company Ltd | Financial services | 2026 |
| Grant Race Consulting Ltd | Professional & scientific | 2022 |
| Grant's Window Cleaning Ltd | Administrative & support | 2024 |
| GRANT44 Limited | Professional & scientific | 2018 |
| Gravenor Trucking Company Limited | Transport & logistics | 2025 |
| Gravitas Ground Screws Limited | Administrative & support | 2017 |
| Green Dene Nutrition Ltd | Health & social care | 2020 |
| Green's Environmental Health and Safety Ltd | Professional & scientific | 2022 |
| Green-Arc Fabrications Limited | Manufacturing | 1981 |
| Greenacre Close Residents Association Limited | Real estate | 2005 |
| Greencrowd Investing Limited | Financial services | 2015 |
| Greenslade Scenery Limited | Information & communication | 2023 |
| Greenwich Watch Company Limited | Professional & scientific | 1965 |
| Grewals Consulting Ltd | Administrative & support | 2020 |
| Groves Wooden Worlds Ltd | Manufacturing | 2022 |
| Gullton Crest Ltd | Other services | 2021 |
| Gyron Digital Ltd | Professional & scientific | 2026 |
| H & GC Villas and Apartments Limited | Hospitality | 2007 |
| H5 Solutions Limited | Information & communication | 2026 |
| Hadford Avenue Limited | Wholesale & retail | 2014 |
| Hailey Beauty Ltd | Other services | 2025 |
| Halfpenny Limited | Professional & scientific | 2016 |
| Hands That Help Limited | Households | 2015 |
| Harlequin Accounting and Financial Services Limited | Professional & scientific | 2015 |
| Harris-Dunkley Ltd | Professional & scientific | 2011 |
| Harry's Yard Ltd | Other services | 2016 |
| Harveys Traffic Management Ltd | Construction | 2025 |
| Harwood Self Winding Watch Company Ltd | Manufacturing | 2025 |
| Harwoods Direct Limited | Wholesale & retail | 2020 |
| Harwoods Land Limited | Real estate | 2016 |
| Harwoods Limited | Wholesale & retail | 1941 |
| Harwoods TPS Limited | Wholesale & retail | 2007 |
| Havant Park Estates Limited | Extraterritorial | 1959 |
| HD Group Ltd | Professional & scientific | 2014 |
| Hennings Investment Holdings Limited | Professional & scientific | 2010 |
| Hennings Wine Merchants Limited | Wholesale & retail | 1960 |
| Henry Adams Lettings (Holdings) Limited | Financial services | 2013 |
| Henry Adams Midhurst Limited | Real estate | 2012 |
| Henry Williams Design Limited | Arts & recreation | 2011 |
| Hepworth & Company Brewers Limited | Manufacturing | 2000 |
| HER Healing Haven Ltd | Health & social care | 2023 |
| Herbal Science Limited | Health & social care | 2022 |
| Hero Strategic Communications Limited | Professional & scientific | 2022 |
| Heuristik Capital Ltd | Financial services | 2024 |
| Hexagon Finance and Advisory Limited | Financial services | 2012 |
| Highden Estate Limited | Other services | 2018 |
| Hillcrest Park Residents Association Limited | Households | 1997 |
| HLH Property Developments Ltd | Real estate | 2025 |
| HLM Consulting Ltd | Information & communication | 2000 |
| Hogan Developments Limited | Real estate | 2023 |
| Holdsworth PR Ltd | Professional & scientific | 2019 |
| Holiday Hero Ltd | Administrative & support | 2025 |
| Holistic Solutions Worldwide Limited | Information & communication | 2021 |
| Holistic Tutoring Limited | Education | 2022 |
| Holm Oak (Management Company) Limited | Households | 2004 |
| Holos London Ltd | Manufacturing | 2018 |
| Holos Sussex Ltd | Manufacturing | 2021 |
| Homeserv Roof Repairs Limited | Construction | 2025 |
| Hoot Digital Limited | Information & communication | 2023 |
| Hormiguitas Limited | Wholesale & retail | 2026 |
| Horsham Driveways Ltd | Administrative & support | 2016 |
| Hortisystems U.K. Ltd. | Wholesale & retail | 1991 |
| HRB Trade Ltd | Wholesale & retail | 2025 |
| Hubbard Aviation Consulting Ltd | Professional & scientific | 2022 |
| Hugg Insulation Ltd | Construction | 2021 |
| Hughes Aqua Energy Limited | Manufacturing | 2020 |
| Hunter Howe Commercial Property Limited | Real estate | 2024 |
| Hunter Howe Estates Limited | Financial services | 2024 |
| Hunter Howe Global Property Limited | Real estate | 2024 |
| Hunter Howe Investment Property Limited | Real estate | 2024 |
| Hunter Howe Investments Limited | Financial services | 2024 |
| Hunter Howe Residential Property Limited | Real estate | 2024 |
| Hydrolec Limited | Professional & scientific | 2022 |
| I.T. Direction Limited | Information & communication | 1999 |
| Icecourt Limited | Real estate | 1980 |