| Gravity Link Limited | Wholesale & retail | 2025 |
| Gray & Sons Butchers Ltd | Wholesale & retail | 2019 |
| Gray Safe Access Limited | Administrative & support | 2011 |
| Graymoore Limited | Construction | 2021 |
| Graytree Ltd | Manufacturing | 2025 |
| Great Global Ltd | Construction | 2014 |
| Greater Homes Ltd | Real estate | 2019 |
| Green and Origin UK Limited | Wholesale & retail | 2026 |
| Green Core Design Studios Ltd | Professional & scientific | 2024 |
| Green Gene Limited | Other services | 2018 |
| Green Golf Balls Europe Ltd. | Wholesale & retail | 2009 |
| Green Harbour Venture Ltd | Real estate | 2021 |
| Green Homes Properties Limited | Real estate | 2023 |
| Green Phoenix UK Limited | Wholesale & retail | 2025 |
| Green Planet Plumbing & Heating Limited | Construction | 2007 |
| Green Rock Creek Ltd | Professional & scientific | 2020 |
| Green Shoots Logistics Ltd | Transport & logistics | 2020 |
| Green Spice Kent Ltd | Hospitality | 2015 |
| Green-It Limited | Water & waste | 2010 |
| Greenatlantic Limited | Real estate | 2020 |
| Greenaway Property Services Limited | Construction | 2014 |
| Greendell Limited | Water & waste | 2008 |
| Greenfield Risk Solutions Limited | Financial services | 2014 |
| Greenfields Property Limited | Real estate | 2005 |
| Greenhithe Drycleaners Ltd | Other services | 2016 |
| Greenhithe Electrical Services Ltd | Construction | 2020 |
| Greenland Facilities Ltd | Construction | 2025 |
| Greenlandd Ltd | Hospitality | 2021 |
| Greenlight Cars Limited | Transport & logistics | 2019 |
| Greenpoint Car Sales Ltd | Wholesale & retail | 2020 |
| Greenwich Home Care Limited | Health & social care | 2024 |
| Greenwichmums Limited | Information & communication | 2011 |
| Greer Property Management Ltd | Real estate | 2026 |
| Greer Studios Limited | Professional & scientific | 2006 |
| Gregory Stringer Ltd | Construction | 2026 |
| Grevola Limited | Wholesale & retail | 2020 |
| Grey Stripe Construction Ltd | Construction | 2011 |
| Grey Stripe Developments Limited | Real estate | 2007 |
| Grey-Water Drainage Solutions Ltd | Administrative & support | 2020 |
| Grey-Water FM Limited | Administrative & support | 2025 |
| Grfm Consultancy Ltd | Real estate | 2023 |
| Grid Box Studio Ltd | Professional & scientific | 2024 |
| Griffin Global Limited | Professional & scientific | 2015 |
| Grilliant Ltd | Hospitality | 2017 |
| Grimsby and Company Limited | Professional & scientific | 2008 |
| Grit Financials Limited | Professional & scientific | 2023 |
| GRM Developments (London) Ltd | Construction | 2004 |
| Grounds Maintenance Limited | Administrative & support | 2024 |
| Grow Funding Ltd | Financial services | 2011 |
| Grow Rise Global Ltd | Hospitality | 2026 |
| Grow to Exit Ltd | Information & communication | 2022 |
| Growler Station Limited | Extraterritorial | 2016 |
| GRR Electrical Solutions Ltd | Construction | 2014 |
| GRS Modular Limited | Construction | 2024 |
| Grupomex (UK) Ltd | Professional & scientific | 2022 |
| GS Doors Ltd | Construction | 2015 |
| GS Software Ltd | Information & communication | 2025 |
| Gsinghproperties Ltd | Real estate | 2019 |
| GSP Furniture Limited | Manufacturing | 2016 |
| GSW Quantity Surveying Services Ltd | Professional & scientific | 2024 |
| GTA Logistics Limited | Transport & logistics | 2016 |
| GTA Multi Ltd | Information & communication | 2014 |
| GTA Trade Ltd | Wholesale & retail | 2022 |
| Gteck Electronics Limited | Manufacturing | 2024 |
| GTM Maintenance Ltd | Construction | 2011 |
| Gtron Solutions Ltd | Information & communication | 2023 |
| Guard Apps Ltd | Information & communication | 2019 |
| Guardians International Limited | Other services | 2015 |
| Guardians International Support Limited | Education | 2014 |
| Guardsecure Limited | Administrative & support | 2010 |
| Guide the Child Publishing Ltd | Information & communication | 2026 |
| Gunther U.K. (Holdings) Limited | Financial services | 2003 |
| Gunther U.K. Limited | Wholesale & retail | 1988 |
| Gurkha Food & Wine Ltd | Wholesale & retail | 2018 |
| Gurvir Brickwork Ltd | Construction | 2021 |
| Guyver Heating Services Ltd | Construction | 2015 |
| Gwdm Ltd | Wholesale & retail | 2025 |
| Gym Exile Ltd | Wholesale & retail | 2009 |
| H & M Quality Meats Limited | Hospitality | 2015 |
| H & R Steel Services Ltd | Administrative & support | 2026 |
| H & S PM Limited | Professional & scientific | 2026 |
| H & Sons Wheels Limited | Wholesale & retail | 2021 |
| H Docksey (Crayford) Limited | Other services | 2013 |
| H Price Ltd. | Real estate | 2015 |
| H&E Marketing Ltd | Other services | 2015 |
| H&H Maintenences Ltd | Construction | 2021 |
| H&H Online Ltd | Wholesale & retail | 2016 |
| H&S Goods Trading Ltd | Wholesale & retail | 2025 |
| H20 Streams Ltd | Water & waste | 2018 |
| Haans Trendy Ltd | Professional & scientific | 2016 |
| Habad Limited | Professional & scientific | 2019 |
| Habib Property Ltd | Real estate | 2025 |
| Hades Venture Limited | Financial services | 2025 |
| Hagan Foods Limited | Wholesale & retail | 2022 |
| Haicare Ltd | Wholesale & retail | 2025 |
| Haider Associates Ltd | Financial services | 2011 |
| Haiders Holdings Ltd | Financial services | 2024 |
| Hail Partners Limited | Administrative & support | 2022 |
| Hailu Ltd | Wholesale & retail | 2022 |
| Hainault Catering Ltd | Hospitality | 2025 |