| Grey Diamond Properties Ltd | Real estate | 2025 |
| Grey Rock Worldwide Ltd | Manufacturing | 2023 |
| Grey Sage Limited | Real estate | 2024 |
| Grid Lock Homes Ltd | Real estate | 2025 |
| Griffindor Limited | Transport & logistics | 2016 |
| Griffinvanguard Network Ltd | Information & communication | 2025 |
| Grill Kebabs Langley Limited | Hospitality | 2026 |
| Grill Street High ST Limited | Hospitality | 2025 |
| Grill Street Ltd | Hospitality | 2019 |
| Grillixx Ltd | Hospitality | 2025 |
| Grimaldi Concepts Ltd | Professional & scientific | 2025 |
| Grimble & SON Ltd | Construction | 2021 |
| Grip Studio Ltd | Arts & recreation | 2026 |
| Gripfit Sports Ltd | Wholesale & retail | 2025 |
| Griston Services Ltd | Construction | 2022 |
| Grizzly Homes Limited | Real estate | 2021 |
| Grnd Coffee Ltd | Manufacturing | 2025 |
| Grocery Products UK Ltd | Wholesale & retail | 2026 |
| Grooveguru Ltd | Wholesale & retail | 2021 |
| Grosvenor Property Investments Limited | Real estate | 2021 |
| Ground & UP Developments Ltd | Construction | 2025 |
| Ground Engineering Consultants Limited | Professional & scientific | 2018 |
| Ground Lizard Ltd | Transport & logistics | 2025 |
| Ground Rent Estates 5 Limited | Real estate | 2006 |
| Group Construct Ltd | Construction | 2018 |
| Group of Global Industries Limited | Wholesale & retail | 2024 |
| Groupe SEB UK Limited | Wholesale & retail | 1979 |
| Groupe SEB UK Pensions Limited | Financial services | 1987 |
| Groupsym Ltd | Administrative & support | 2013 |
| Grove BIO Consulting Ltd | Professional & scientific | 2021 |
| Grovecourt Properties Ltd | Real estate | 1997 |
| Grover Food&Wine Ltd | Wholesale & retail | 2017 |
| Grover Store Ltd | Wholesale & retail | 2013 |
| Grow Beyond Investments Ltd | Real estate | 2024 |
| Grow Properties Ltd | Real estate | 2021 |
| Growider Ltd | Real estate | 2018 |
| Growmore Construction UK Ltd | Construction | 2021 |
| Growth Cubee Ltd | Professional & scientific | 2019 |
| Growth NOW Media Ltd | Professional & scientific | 2017 |
| GRP Real Estate Management Limited | Real estate | 2024 |
| GRR Civil Construction Ltd | Construction | 2024 |
| GRS Estate Limited | Real estate | 2021 |
| Grzeszyk Top Trans Ltd | Transport & logistics | 2021 |
| GS Building Contractors Ltd | Construction | 2012 |
| GS Express Ltd | Transport & logistics | 2026 |
| GS Gill Investments Limited | Real estate | 2023 |
| GS Integrator Limited | Construction | 2021 |
| GS Platinum & Co Limited | Wholesale & retail | 2026 |
| GS Screeding Ltd | Construction | 2024 |
| GS1 Properties Ltd | Real estate | 2022 |
| GSA Enterprise Limited | Real estate | 2018 |
| Gsaf Properties Limited | Real estate | 2025 |
| GSB Brickwork Ltd | Construction | 2019 |
| GSB Building Services Limited | Construction | 2025 |
| GSB Consultancy Limited | Administrative & support | 2023 |
| GSB Group Holdings Limited | Financial services | 2025 |
| GSB OHL Rail Ltd | Construction | 2023 |
| GSB Properties & Investments Ltd | Real estate | 2021 |
| GSB Properties Ltd | Real estate | 2021 |
| GSC Top Construction Ltd | Construction | 2025 |
| GSF Construction Ltd | Construction | 2020 |
| GSF Housing Limited | Real estate | 2025 |
| GSG Autos (Bucks) Limited | Wholesale & retail | 2015 |
| GSG UK Construction Ltd | Construction | 2019 |
| GSI Building Services Ltd | Construction | 2021 |
| GSK Building Works Ltd | Construction | 2020 |
| GSK Investments Limited | Real estate | 2021 |
| Gsmile Services Ltd | Other services | 2024 |
| GSN Marketing Ltd | Professional & scientific | 2023 |
| GSN Transport Limited | Transport & logistics | 2023 |
| GSP Building Limited | Construction | 2024 |
| GSP Glazing Limited | Construction | 2022 |
| GSP Property & Investments Ltd | Real estate | 2020 |
| GSR Associates Limited | Professional & scientific | 2013 |
| GSS B.I. Consultancy Limited | Information & communication | 2011 |
| GSS Property Investment Ltd | Real estate | 2023 |
| Gstar Property Services Limited | Administrative & support | 2016 |
| GSV Partners Ltd | Professional & scientific | 2014 |
| GSX Technologies Limited | Information & communication | 2024 |
| GT Executive Cars Ltd | Transport & logistics | 2016 |
| GT Option Travel Ltd | Administrative & support | 2025 |
| GT Tuition Ltd | Education | 2022 |
| Gtax Accountants Limited | Professional & scientific | 2024 |
| GTC Courier Ltd | Transport & logistics | 2011 |
| Gtech Technologies Ltd | Information & communication | 2019 |
| GTG Solutions Limited | Professional & scientific | 2013 |
| GTG Tech Solutions (UK) Ltd | Information & communication | 2025 |
| Guardian Angels Realty Ltd | Real estate | 2024 |
| Guardian Computing Limited | Information & communication | 1990 |
| Guardian Financial Planners Limited | Financial services | 1983 |
| Guardian JEM Limited | Information & communication | 2026 |
| Guardian Partners Ltd | Financial services | 2025 |
| Guardian Property Services Limited | Professional & scientific | 1989 |
| Gudu Cars Limited | Wholesale & retail | 2025 |
| Gugan Courier Limited | Transport & logistics | 2020 |
| GUL Homes Ltd | Real estate | 2025 |
| GUL Properties Ltd | Real estate | 2022 |
| Guljar Real Estate Ltd | Real estate | 2024 |
| Gull Collection Ltd | Wholesale & retail | 2026 |
| Gull GEE Ltd | Real estate | 2026 |