| G8 Payroll Consulting Ltd | Professional & scientific | 2021 |
| Gabbi Edmunds Ltd | Arts & recreation | 2019 |
| GAC & SJC Consultants Limited | Financial services | 2014 |
| GAC Capital Ltd | Extraterritorial | 2022 |
| Gachi Tech Ltd | Information & communication | 2015 |
| Gaia Newton Associates Limited | Administrative & support | 2015 |
| Gailliard Limited | Wholesale & retail | 1997 |
| GAINSBOROUGH2 Ltd | Information & communication | 2026 |
| Gainswood Limited | Real estate | 2023 |
| Gala Court (Croydon) Management Company Limited | Households | 2023 |
| Gala Yachting Ltd | Extraterritorial | 2026 |
| Galamast Limited | Construction | 1991 |
| Galina Holding Ltd | Professional & scientific | 2024 |
| Galleon Asset Management Limited | Real estate | 2016 |
| Galleon Court (Chafford Hundred) Management Limited | Households | 2000 |
| Gallia RAE Limited | Wholesale & retail | 2025 |
| Gallus ET Mulier Limited | Manufacturing | 2011 |
| Galorebeauti Ltd | Other services | 2023 |
| Gals Studio Ltd | Wholesale & retail | 2025 |
| Gama Capital Limited | Financial services | 2015 |
| GAMESPOINT4U Limited | Wholesale & retail | 2021 |
| Ganesha Bromley Ltd | Hospitality | 2019 |
| Ganesha RM Ltd | Wholesale & retail | 2016 |
| Garden Care Holdings Limited | Financial services | 2025 |
| Garden Care Properties Limited | Real estate | 2025 |
| Garden in Mind CIC | Public administration | 2024 |
| Gardenia Management Limited | Administrative & support | 2012 |
| Gareth John Ltd | Professional & scientific | 2018 |
| Garratt Green NO.2 Residents Company Limited | Real estate | 1993 |
| Garry Brooks Limited | Administrative & support | 2006 |
| Garto Ltd | Manufacturing | 2018 |
| Gary's Island Kitchen Ltd | Hospitality | 2022 |
| GAS Boiler & Heating Repair Ltd | Construction | 2020 |
| GAS Electronic Systems Limited | Information & communication | 2001 |
| GAS Safe Heating and Plumbing Limited | Manufacturing | 2007 |
| Gatcombe Court and Highgrove Court Management Company Limited | Households | 1990 |
| Gate 359 Ltd | Wholesale & retail | 2025 |
| Gatehouse Capital Ltd | Real estate | 2020 |
| Gatehouse Technology Limited | Administrative & support | 2015 |
| Gatemill Limited | Information & communication | 1981 |
| Gator Shipping Limited | Transport & logistics | 2021 |
| Gavin Byrne Consulting Limited | Real estate | 2003 |
| Gavino Services Limited | Other services | 2023 |
| GAY Men's Therapy Limited | Health & social care | 2019 |
| Gayathri Consulting Ltd | Information & communication | 2022 |
| Gayzpacho Ltd | Hospitality | 2019 |
| GB Books Limited | Professional & scientific | 2011 |
| Gbcc Safety Consultancy Ltd | Arts & recreation | 2015 |
| GBG Electrical Limited | Professional & scientific | 1978 |
| GBO Enterprises Ltd | Professional & scientific | 2022 |
| GBS & Associates Limited | Professional & scientific | 2017 |
| GBT Property Ltd | Real estate | 2025 |
| GC Medicare Services Ltd | Health & social care | 2010 |
| GC Safety Ltd | Professional & scientific | 2022 |
| GCE Cleaning Services Limited | Administrative & support | 2016 |
| GDC Electrical Limited | Construction | 2024 |
| GDR Property Services Ltd | Households | 2024 |
| GDT (Kent) Limited | Administrative & support | 2024 |
| GDT (Sussex) Limited | Administrative & support | 2024 |
| GEC Solutions Limited | Professional & scientific | 2012 |
| Geda Services Limited | Administrative & support | 2023 |
| Geddy Court RTM Company Limited | Households | 2016 |
| Geek School Tutoring Ltd | Administrative & support | 2014 |
| Geekygain Ltd | Wholesale & retail | 2021 |
| GEL Systems Limited | Other services | 1982 |
| Gemeter Limited | Transport & logistics | 2018 |
| Gemma Bishop London Limited | Professional & scientific | 2021 |
| Gemma Quirke Limited | Health & social care | 2024 |
| GENER8 Connections Ltd | Information & communication | 2023 |
| GENER8 Estates Ltd | Real estate | 2024 |
| General Air Services Limited | Transport & logistics | 2004 |
| General Bureau Limited | Real estate | 1989 |
| Generation 3D Ltd | Manufacturing | 2025 |
| Genesis Acquisitions Limited | Real estate | 2022 |
| Genesis Health Ltd | Health & social care | 2018 |
| Genet Developments Limited | Real estate | 2015 |
| Genius Plaza Int'L Co., Ltd. | Extraterritorial | 2014 |
| Genixus Labs Ltd | Information & communication | 2025 |
| Genuine Care Services Limited | Public administration | 2025 |
| GEO Property Services Ltd | Construction | 2022 |
| Geodesic Consulting Services Limited | Professional & scientific | 2019 |
| Geoffrey Wallis Limited | Financial services | 1972 |
| George & Anna UK Limited | Transport & logistics | 2023 |
| George E Construction Ltd | Administrative & support | 2017 |
| George Proctor & Partners (Bromley) Limited | Real estate | 2012 |
| George Shaef Consulting Ltd | Professional & scientific | 2012 |
| Georges Cafe Limited | Hospitality | 2022 |
| Georges Cycles Ltd | Wholesale & retail | 2021 |
| Georgina House Limited | Households | 1998 |
| Georgios Vardakis Piano Ltd | Education | 2025 |
| Gero Biundo Limited | Professional & scientific | 2023 |
| Gerrard Court Management Company Limited | Households | 2003 |
| GET Licensed Driving School Limited | Education | 2018 |
| GET Licensed Limited | Information & communication | 2010 |
| GET Van & MAN Ltd | Transport & logistics | 2022 |
| GET Xtended by LD Limited | Other services | 2020 |
| Getech Electrical & Associated Services Limited | Construction | 2004 |
| GFC Hair Studio Limited | Other services | 2022 |
| GFM Heating Ltd | Construction | 2026 |
| GH Cute Alloys Ltd | Wholesale & retail | 2019 |