| Garrison Properties (Southern) Ltd | Construction | 2019 |
| Gary Fowler Start 2 Finish Limited | Construction | 2014 |
| Gatcombe Estate and Vineyard Ltd | Manufacturing | 2022 |
| Gatcombe Estate Vineyard LLP | | 2022 |
| Gate Post Production Limited | Information & communication | 2011 |
| Gateway Enterprises Limited | Real estate | 2023 |
| Gateway IT Solutions Limited | Information & communication | 2020 |
| Gator Ltd | Professional & scientific | 2020 |
| Gavi Homes Ltd | Professional & scientific | 2022 |
| Gayle Group Limited | Real estate | 2025 |
| Gayle Mansfield Designs Limited | Professional & scientific | 2022 |
| GB Environmental Limited | Other services | 2012 |
| GB Metecc (UK) Limited | Professional & scientific | 2024 |
| Gcds Construction Ltd | Construction | 2019 |
| GCW 4DP Limited | Hospitality | 2025 |
| GD Tetesanu Ltd | Hospitality | 2025 |
| GEAR9 Limited | Information & communication | 2024 |
| Gearing Management Services Limited | Professional & scientific | 2016 |
| Geckoheat Ltd | Construction | 2025 |
| Geko Properties Limited | Real estate | 2024 |
| GEM Ceilings and Walls Specialists Limited | Construction | 2015 |
| Gem-Uk Garage (Ferring) Ltd | Wholesale & retail | 2009 |
| Gemini Brighton Limited | Construction | 2017 |
| Gemini Woodmill Ltd | Financial services | 2025 |
| Gene Commerce Limited | Information & communication | 2013 |
| Gene Investments Limited | Real estate | 2018 |
| Generation E Ltd | Health & social care | 2005 |
| Generico 10 Limited | Financial services | 2025 |
| GEO. Collins (Engineers) Limited | Professional & scientific | 1964 |
| Geoffreypollard Limited | Education | 2013 |
| George Potter Limited | | 1925 |
| George S Hall Americas Limited | Financial services | 1981 |
| Georgia Martin Limited | Wholesale & retail | 2021 |
| Georgian Gardens Limited | Real estate | 2019 |
| Geraldo Jewellery Limited | Wholesale & retail | 2014 |
| Gerard's Cars Ltd | Wholesale & retail | 2025 |
| Gerrard Luck Electrical Services Ltd | Wholesale & retail | 2026 |
| Gery SRL Ltd | Health & social care | 2025 |
| GET IT Gone Waste Disposal and Recycling Limited | Extraterritorial | 2020 |
| GET Pristine Clean Ltd | Administrative & support | 2026 |
| Gfow Limited | Information & communication | 2024 |
| GH Property Rentals Limited | Real estate | 2023 |
| GH Reports Limited | Education | 2010 |
| Ghaem Gynaecology Limited | Health & social care | 2015 |
| GHF Advisory Ltd | Professional & scientific | 2018 |
| Ghise Ltd | Transport & logistics | 2025 |
| Ghodsi (Goring) Limited | Other services | 2011 |
| Ghorbanian Plastic & Reconstructive Surgery Ltd | Health & social care | 2025 |
| Ghost Broadband Limited | Information & communication | 2024 |
| Ghost Group Holdings LLP | | 2024 |
| Ghost Lifestyle UK Limited | Wholesale & retail | 2025 |
| Ghost Pictures Ltd | Information & communication | 2022 |
| GI Signs Limited | Construction | 2013 |
| GIA Consultants Ltd | Professional & scientific | 2022 |
| Giants Gymnastics Company Limited | Arts & recreation | 2025 |
| Gibson Construction Services Ltd | Construction | 2024 |
| Giddings Trading Limited | Construction | 2011 |
| Gigante Knits Limited | Professional & scientific | 2026 |
| Gigante Tech Ltd | Information & communication | 2026 |
| Gigglewick Creations Ltd | Arts & recreation | 2020 |
| Gilfrond Properties Limited | Real estate | 1971 |
| Giltrealm Limited | Financial services | 1990 |
| Gina Wilson Ltd | Health & social care | 2021 |
| Ging Peakin Special Cameras Limited | Information & communication | 2012 |
| Gingaroo UK Limited | Administrative & support | 2011 |
| Ginger Belle Limited | Professional & scientific | 2016 |
| Ginger Juice Creative Ltd | Professional & scientific | 2026 |
| Ginger Lily Emporium Ltd | Wholesale & retail | 2016 |
| Ginza Sushi Ltd | Hospitality | 2026 |
| Girl of Muse Ltd | Wholesale & retail | 2021 |
| Giuseppes Kitchen Limited | Hospitality | 2024 |
| Giuseppes Party Limited | Hospitality | 2024 |
| Give ME Moore Aesthetics Ltd | Other services | 2025 |
| GJR Couriers Ltd | Transport & logistics | 2025 |
| GK Investment Group Ltd | Real estate | 2021 |
| GK SON Ltd | Wholesale & retail | 2015 |
| Gkirby Collection Limited | Wholesale & retail | 2016 |
| GKJ Consultants Limited | Administrative & support | 2002 |
| GKP & P Limited | Information & communication | 2018 |
| Gkpt Ladydell Limited | Professional & scientific | 2024 |
| Gladwish Land Management Limited | Real estate | 2003 |
| Gladwish Land Sales Limited | Wholesale & retail | 2003 |
| Glam and Glitter Media Ltd | Information & communication | 2014 |
| Glamgirl Ltd | Manufacturing | 2004 |
| Glamorous YOU Ltd | Other services | 2010 |
| Glasir Carpentry Ltd | Administrative & support | 2017 |
| Glass and Glazing West Sussex Limited | Construction | 2025 |
| Glasscraft Contracting Limited | Construction | 2025 |
| Gleam Tech Auto Ltd | Wholesale & retail | 2025 |
| Glen Williams Ltd. | Transport & logistics | 2010 |
| Glenbarrie Way Residents Management Company Limited | Households | 2013 |
| Glencourt Associates Limited | Administrative & support | 1996 |
| Glenn Haulkham Groundworks Ltd | Construction | 2015 |
| Global 4 Immigration Ltd | Administrative & support | 2005 |
| Global Alliance Consulting Ltd | Professional & scientific | 2015 |
| Global E-Trade Consultancy Ltd | Wholesale & retail | 2023 |
| Global Perspectives International Ltd | Professional & scientific | 1999 |
| Global Select a JET Limited | Transport & logistics | 2012 |
| Global Shield Services Limited | Construction | 2026 |
| Global Sustainability Benchmark in Sports (Gsbs) Limited | Other services | 2020 |