| G & H GAS and Heating Ltd | Construction | 2026 |
| G & L Logistics Ltd | Transport & logistics | 2015 |
| G & S Traction Limited | Information & communication | 2003 |
| G C H Recycling Ltd. | Water & waste | 2018 |
| G D Partnership Limited | Professional & scientific | 2003 |
| G J B Technical Consultants Ltd | Information & communication | 2014 |
| G L Cordier Electrical Limited | Construction | 2022 |
| G Newlands Ltd | Professional & scientific | 2013 |
| G R Bradley Maintenance Limited | Construction | 2012 |
| G Russell Plumbing Ltd | Construction | 2024 |
| G&C Cargo Logistics Ltd | Transport & logistics | 2022 |
| G&J Lets LLP | | 2025 |
| G&N Kitchens Ltd | Hospitality | 2023 |
| G&T Exhibition's Limited | Administrative & support | 2025 |
| G&T Haulage Limited | Transport & logistics | 2016 |
| G- DNA UK Ltd | Health & social care | 2026 |
| G-Construct Limited | Extraterritorial | 2015 |
| G. a. Harper Ltd. | Construction | 1999 |
| G. B. Refinish Supplies Ltd | Administrative & support | 2003 |
| G. Wisdom Ltd | Construction | 2019 |
| G.C.H. Developments Limited | Construction | 2019 |
| G.F. (Furnishings) Limited | | 1986 |
| G.J.Killoughery Limited | Construction | 2012 |
| G.N.G. Properties Limited | Real estate | 2019 |
| G.N.G. Services Limited | Financial services | 2002 |
| G.R. Carpentry Ltd | Construction | 2001 |
| G.S.F.M Ltd | Construction | 2022 |
| G.W. Studio Limited | Manufacturing | 2014 |
| G.W.C Kent Ltd | Administrative & support | 2025 |
| G19 Digital Limited | Professional & scientific | 2026 |
| Gabid Realcomfort Ltd | Real estate | 2023 |
| Gabtod Ltd | Administrative & support | 2025 |
| Gaby Logistics and Distribution Limited | Transport & logistics | 2026 |
| Gadgetifyuk Ltd | Wholesale & retail | 2014 |
| Gaff Plumbing and Heating Limited | Construction | 2019 |
| Gagan Holdings Limited | Financial services | 2013 |
| Gagan Property Holdings Ltd | Real estate | 2018 |
| Gahie Holdings Ltd | Professional & scientific | 2026 |
| Gaia Environmental Limited | Construction | 2014 |
| Gain Education Ltd | Administrative & support | 2019 |
| Gajak Ltd | Hospitality | 2024 |
| Galaxy 13 Limited | Professional & scientific | 2021 |
| Galaxy 24/7 Limited | Information & communication | 2023 |
| Galaxy Capital Real Estate Ltd | Real estate | 2023 |
| Galaxy Support and Solution Ltd | Professional & scientific | 2017 |
| Galleon Fixings Limited | Manufacturing | 1999 |
| Galleon Investments (Dartford) Limited | Professional & scientific | 2014 |
| Gallop Homes Ltd | Construction | 2023 |
| Gallophomes 1 Ltd | Construction | 2025 |
| Galmark Building Services Ltd | Construction | 2020 |
| Galmark Electrical Ltd | Energy | 2020 |
| Galway Group Services Ltd | Construction | 2026 |
| Game Chique Ltd | Manufacturing | 2020 |
| Gander Letting Agent Limited | Real estate | 2020 |
| Gangsline Ltd | Information & communication | 2012 |
| GAP Lighting Limited | Wholesale & retail | 2009 |
| GAR Electrical Services Ltd | Construction | 2023 |
| GAR Enterprises Ltd | Other services | 2026 |
| Gardenia Consultancy and Design Ltd | Information & communication | 2019 |
| Gardenique Limited | Administrative & support | 2025 |
| Gareth Williams MBE Ltd | Professional & scientific | 2026 |
| Garrett Build Ltd | Construction | 2023 |
| Gary Lintorn Estate Agent Limited | Real estate | 2021 |
| Garylintorn.Com Limited | Real estate | 2020 |
| GAS Advisory Services Limited | Professional & scientific | 1997 |
| GAS Base Limited | Information & communication | 2026 |
| Gas-Jet Limited | Construction | 1995 |
| Gascom Group Ltd | Real estate | 2024 |
| Gase Marine and General Engineering Services Limited | Manufacturing | 1992 |
| Gates and Dartford ETH College Limited | Education | 2017 |
| Gateway Church - Dartford Limited | Other services | 2012 |
| Gateways of Europe Limited | Administrative & support | 2016 |
| Gator Finance Ltd | Financial services | 2012 |
| Gavaza Ltd | Health & social care | 2023 |
| Gaywood Court Residents Association Limited | Households | 1968 |
| GB Pipework Limited | Wholesale & retail | 2006 |
| Gboye Estates Limited | Real estate | 2021 |
| GBS Group of Companies Limited | Financial services | 2018 |
| GBS Property Holding Company Limited | Real estate | 2018 |
| Gcsi (Holdings) Limited | Financial services | 2011 |
| Gcsi Property Limited | Real estate | 2024 |
| GD Gym Group Limited | Arts & recreation | 2024 |
| GD Gyms Limited | Arts & recreation | 2023 |
| GDB Management Consulting Limited | Professional & scientific | 2013 |
| GDD Technology Ltd | Financial services | 2023 |
| GDW Estimating and Surveying Services Ltd | Professional & scientific | 2019 |
| Geax Solutions Ltd | Information & communication | 2012 |
| GEB Housing CIC | Health & social care | 2024 |
| Gee-Bec Holdings Limited | Real estate | 2017 |
| Geeway Ltd | Information & communication | 2014 |
| GEH Limited | Administrative & support | 2005 |
| Geli Vipa Ltd | Real estate | 2020 |
| Gelid Ltd | Manufacturing | 2017 |
| GEM Hr/Payroll Solutions Limited | Professional & scientific | 2007 |
| GEM Kreatives Limited | Arts & recreation | 2015 |
| Gemmindz Services Limited | Professional & scientific | 2020 |
| Gemologue Ltd | Arts & recreation | 2012 |
| Gems Reach and Wash Cleaning Limited | Administrative & support | 2026 |
| Gem’S Childcare Limited | Health & social care | 2023 |
| General Haulage Ltd | Transport & logistics | 2018 |