| Gents of London Products Limited | Wholesale & retail | 2015 |
| GEO Growth Media Limited | Professional & scientific | 2023 |
| GER Garden Ltd | Administrative & support | 2025 |
| Gestingthorpe Farming Company Limited | Agriculture & fishing | 1995 |
| GG Ltd | Extraterritorial | 2024 |
| Gggh Limited | Extraterritorial | 2021 |
| Ghasemi Limited | Real estate | 2023 |
| GHB Events Ltd | Other services | 2023 |
| GHB Hire Limited | Other services | 2010 |
| Gift Inspiration Ltd | Wholesale & retail | 2019 |
| Gilbey Butchers Limited | Wholesale & retail | 2019 |
| Gilbey Green Management Company Limited | Households | 1988 |
| Girl on SAX Ltd | Arts & recreation | 2019 |
| Girls That MIX Ltd | Arts & recreation | 2022 |
| GKT Properties Limited | Real estate | 2019 |
| Glamping Industries Trade Association (UK) Limited | Other services | 2024 |
| GLC Holdings Group Ltd | Financial services | 2024 |
| Gleeson & Co Ltd | Financial services | 2021 |
| Glencross Partners Limited | Professional & scientific | 2024 |
| Glitz London Ltd | Information & communication | 2018 |
| Global Integrated Group Limited | Professional & scientific | 2018 |
| Global Women Connected Ltd | Education | 2016 |
| Glow at Work Limited | Professional & scientific | 2023 |
| Glow Worldwide Limited | Administrative & support | 2026 |
| Glyn Camp Ltd | Administrative & support | 2019 |
| GM Ltd | Extraterritorial | 2008 |
| GNP Technology Ltd | Professional & scientific | 2014 |
| GNU Media Limited | Information & communication | 2010 |
| Go Motorsports Limited | Wholesale & retail | 2016 |
| Goddard Bros. LLP | | 2019 |
| Goddard's(F.H.)Limited | Wholesale & retail | 1935 |
| Goddards Interiors Limited | Wholesale & retail | 2003 |
| Gold Leaf Properties Ltd | Construction | 2015 |
| Goldfish Analytical CMC Consulting Ltd | Professional & scientific | 2025 |
| Good Emperor Limited | Administrative & support | 2021 |
| Goodhare Ltd | Other services | 2020 |
| Goose Marketing Limited | Professional & scientific | 2002 |
| Gopurpl Ltd | Education | 2023 |
| Gordion Consulting Ltd | Financial services | 2021 |
| Goshen Music Group Ltd | Arts & recreation | 2017 |
| Gostick Properties Ltd | Construction | 2002 |
| Gotoporoff LLP | | 2023 |
| Governor Limited | Manufacturing | 2012 |
| GP Limited | Extraterritorial | 2007 |
| GPW Workshop Ltd | Wholesale & retail | 2023 |
| Gracious Groundworks Ltd | Construction | 2024 |
| Grafton Motorcycles Limited | Wholesale & retail | 2005 |
| Grafton Prop Ltd | Administrative & support | 2018 |
| Grange Developments Limited | Real estate | 2002 |
| Granta Architectural Hardware Limited | Wholesale & retail | 2022 |
| Granta Computing Limited | Information & communication | 1996 |
| Granta Farming Limited | Agriculture & fishing | 2002 |
| Granta Property Consultants Limited | Real estate | 2008 |
| Graphicshow Cable Accessories (GCA) Limited | Manufacturing | 1998 |
| Gratrotech Ltd | Information & communication | 2010 |
| Gravitec Sensor Systems Ltd | Professional & scientific | 2014 |
| Gray Parikh Architects Ltd. | Professional & scientific | 2003 |
| Great Chesterford Kung FU Ltd | Education | 2024 |
| Great Eastern Designs Limited | Extraterritorial | 2008 |
| Great Oak Multi Academy Trust | Education | 2011 |
| Great Shouts Consultancy Ltd | Professional & scientific | 2025 |
| Green Avenue Consulting Ltd | Professional & scientific | 2017 |
| Green River Farm LLP | | 2011 |
| Green Technology Solutions Ltd | Financial services | 2019 |
| Greenmaps Limited | Information & communication | 2012 |
| Greenside Golf Holdings Limited | Professional & scientific | 2014 |
| Greenside Holdings Limited | Financial services | 2018 |
| Greenwood Employee Benefits Ltd | Financial services | 2013 |
| Greenwood Financial Planning LLP | | 2009 |
| Greenwood Wealth Management Limited | Professional & scientific | 2009 |
| Grer Property Services Ltd | Real estate | 2025 |
| Greybrook Limited | Information & communication | 1998 |
| Greyfield Advisory Ltd | Professional & scientific | 2025 |
| Grieves Strategy Consulting Limited | Professional & scientific | 2026 |
| Griffin & Son’S Limited | Construction | 2023 |
| Grinstead Lane Coal Yard Management Company Limited | Households | 2020 |
| Grom Agency Ltd | Information & communication | 2020 |
| Grovemore Homes Limited | Construction | 1985 |
| GS Construction (SW) Limited | Construction | 2020 |
| GS Shop Ltd | Wholesale & retail | 2024 |
| Gstaads Installations Limited | Manufacturing | 2024 |
| Gstaads Limited | Manufacturing | 2015 |
| Gtam Service Station Ltd | Wholesale & retail | 2015 |
| Gtam Shop Limited | Wholesale & retail | 2019 |
| Guru Dudu Productions UK Ltd | Arts & recreation | 2018 |
| Guster Investments Limited | Construction | 2012 |
| GUY Morrison Ltd | Administrative & support | 2018 |
| GWB Horticulture Ltd | Administrative & support | 2015 |
| Gymconvenience Ltd | Other services | 2026 |
| H Tidiman Limited | Wholesale & retail | 2011 |
| H Y Properties Management Limited | Real estate | 2004 |
| H&A Coffee Limited | Hospitality | 2025 |
| H. Woodman Limited | Real estate | 1972 |
| H.A.G.S Productions Ltd | Administrative & support | 2024 |
| H.R. Millen Ltd | Construction | 2004 |
| H.W. Bartlett & Sons Limited | Construction | 2013 |
| H.Wiseman & Son(Wimbish)Limited | Agriculture & fishing | 1964 |
| Haanuwise Technologies Ltd | Financial services | 2020 |
| Hair DEN (Newmarket) Ltd | Other services | 2020 |
| Hajaru Ltd | Professional & scientific | 2025 |