| Gallagher Contractors Limited | Professional & scientific | 2001 |
| Gallagher Farms Limited | Agriculture & fishing | 2010 |
| Gallagher Group Holdings Ltd | Professional & scientific | 2016 |
| Gallagher Group Limited | Professional & scientific | 1988 |
| Gallagher Holdings (Kent) Limited | Professional & scientific | 2003 |
| Gallagher Land Limited | Real estate | 2006 |
| Gallagher Limited | Construction | 1999 |
| Gallagher Materials Limited | Professional & scientific | 2002 |
| Gallagher Plant Limited | Administrative & support | 1973 |
| Gallagher Processed Aggregates Limited | Manufacturing | 2017 |
| Gallagher Properties Limited | Real estate | 1986 |
| Gallant Property Ltd | Real estate | 2013 |
| Gallery Construction Ltd | Professional & scientific | 2020 |
| Gallery Interiors (South East) Limited | Construction | 2007 |
| Gallery Maintenance London Ltd | Extraterritorial | 2020 |
| Gallery Maintenance Ltd | Other services | 2018 |
| Game Reach ADS Ltd | Wholesale & retail | 2025 |
| Gamma Eleven Ltd | Financial services | 2023 |
| Gamma Plant Limited | Manufacturing | 2015 |
| Gammage Logistics Ltd | Transport & logistics | 2026 |
| GAP Broadcast Services Limited | Information & communication | 2020 |
| Gapfree Properties Limited | Hospitality | 2006 |
| Garagewise Ltd | Information & communication | 2025 |
| Garant Repair UK Ltd | Wholesale & retail | 2023 |
| Garden Gate Consulting Ltd | Professional & scientific | 2026 |
| Garden Identity Ltd | Administrative & support | 2018 |
| Garden Machinery Experts Limited | Other services | 2024 |
| Gardium Ltd | Administrative & support | 2022 |
| Garry Holmes Limited | Construction | 2013 |
| Gartner Global Ltd | Wholesale & retail | 2023 |
| Gary Bryan Carpentry Limited | Construction | 2008 |
| GAS Alliance Services Limited | Extraterritorial | 2009 |
| Gassons (Snodland) Management Company Limited | Households | 1981 |
| Gate One Limited | Professional & scientific | 2013 |
| Gatetracker Ltd | Wholesale & retail | 2012 |
| Gateway Investments Ltd | Construction | 2020 |
| Gatolux Limited | Construction | 2025 |
| Gatward (Maidstone) Limited | Wholesale & retail | 1974 |
| Gaul Pubs Ltd | Hospitality | 2023 |
| Gault Property Management Ltd | Real estate | 2024 |
| Gault Property Rentals Ltd | Real estate | 2025 |
| Gaussfield Ltd | Professional & scientific | 2010 |
| Gazzabash Ltd | Arts & recreation | 2008 |
| GB Carpentry Ltd | Construction | 2023 |
| GB Direct Travel Minibus Company Ltd | Transport & logistics | 2019 |
| GB Flooring Solutions Ltd | Construction | 2026 |
| GB Lift Services Ltd | Construction | 2022 |
| GB Mile Limited | Transport & logistics | 2021 |
| GB Padel Ltd | Arts & recreation | 2025 |
| Gbemisolab Limited | Hospitality | 2025 |
| GBL Build Ltd | Construction | 2019 |
| GBN Limited | Transport & logistics | 2018 |
| GC 1780 Limited | Professional & scientific | 2002 |
| GC Spencer Ltd | Professional & scientific | 2018 |
| Gconfx Ltd | Information & communication | 2007 |
| GCR Camprop Three Limited | Construction | 2017 |
| GD Roofing & Cladding Ltd | Construction | 2021 |
| GD Tweeda Ltd | Transport & logistics | 2020 |
| GDM Architects Limited | Professional & scientific | 1992 |
| GDS Construction South East Ltd | Construction | 2024 |
| GE Architects Ltd | Professional & scientific | 1998 |
| Gearing Recruitment Solutions Ltd | Administrative & support | 2021 |
| Geenstar Ltd | Wholesale & retail | 2020 |
| Geera Ltd | Construction | 2019 |
| Geering's Ventilation Services Limited | Construction | 2019 |
| Geko Developments Ltd | Real estate | 2010 |
| GEM Supplies Limited | Wholesale & retail | 2000 |
| Gema Properties Ltd | Real estate | 2023 |
| Gema Solutions Ltd | Information & communication | 2020 |
| Gemini Hire & Sales Ltd | Administrative & support | 1995 |
| Gemm Design Limited | Professional & scientific | 2011 |
| Gemma MAY Limited | Administrative & support | 2007 |
| Gemma Mizon Gynaecology Services Limited | Health & social care | 2025 |
| Gemmology Rocks Limited | Wholesale & retail | 2017 |
| Gemstone Ales Ltd. | Manufacturing | 2015 |
| GEN 2 Services Limited | Construction | 2015 |
| Gencl Ltd | Health & social care | 2017 |
| Genco Construction Services Ltd | Construction | 2006 |
| Genco Fire Safety Limited | Construction | 2025 |
| Genco Land & Properties Limited | Construction | 2020 |
| Genco Management Holdings Limited | Construction | 2025 |
| Genco Mechanical & Electrical Services Ltd | Manufacturing | 2021 |
| Genco Solutions Limited | Wholesale & retail | 2010 |
| Genco Special Projects Limited | Construction | 2024 |
| Genco UK Group Limited | Financial services | 2024 |
| Geneform Technologies Limited | Professional & scientific | 2002 |
| Generator Installations (UK) Limited | Manufacturing | 2012 |
| Generics Homes Ltd | Health & social care | 2024 |
| Generics Properties Ltd | Real estate | 2017 |
| Genesis Healthcare Ltd | Health & social care | 2017 |
| Genezis Ltd | Transport & logistics | 2019 |
| Genie Innovations Ltd | Information & communication | 2019 |
| Gentle Media Ltd | Information & communication | 2006 |
| Geodata Itms Ltd. | Professional & scientific | 2014 |
| Geoff White Limited | Construction | 2003 |
| Geoffrey Bates Limited | Agriculture & fishing | 1950 |
| Geopoint Advisory Limited | Professional & scientific | 2014 |
| George Corderoy LLP | | 2006 |
| George Humphrey Limited | Real estate | 1926 |
| George Street Mansions Limited | Real estate | 2017 |