| Glasshouse Records Limited | Extraterritorial | 2014 |
| Glassworks London Limited | Administrative & support | 2003 |
| Glebelands Apartments Management Company Limited | Real estate | 2006 |
| Glebelands Field (Developments) Ltd | Construction | 2003 |
| Glebelands Field Developments 2008 Limited | Professional & scientific | 2008 |
| Glee Communications Limited | Information & communication | 2009 |
| Glenspray Motors Limited | Transport & logistics | 2005 |
| Global Artichoke Limited | Administrative & support | 2006 |
| Global Uplink Limited | Financial services | 2023 |
| Gloh Energy Services Ltd | Construction | 2024 |
| GM Coachwork Limited | Manufacturing | 1998 |
| Go Green Engineering Ltd | Construction | 2010 |
| GO4RO Grips Ltd | Information & communication | 2022 |
| Goblin Grapple SAW & Lifting Ltd | Agriculture & fishing | 2025 |
| Goda Holdings Ltd | Financial services | 2022 |
| Going Down in History Productions Ltd | Information & communication | 2018 |
| Going Green Ltd | Real estate | 2019 |
| GOLD2POUNDS Limited | Financial services | 2009 |
| Goldmay Limited | Health & social care | 2004 |
| Gomango Limited | Professional & scientific | 2003 |
| Gone Trekking Enterprises Limited | Professional & scientific | 2003 |
| Good Day Yellow Ltd | Professional & scientific | 2011 |
| Goodwill Community Holdings 2024 C.I.C. | Wholesale & retail | 2024 |
| Googleberry Limited | Arts & recreation | 2019 |
| Goosegrass Logistics Ltd | Transport & logistics | 2021 |
| Gorman Constructions Limited | | 1974 |
| Gormans Metals Limited | Extraterritorial | 2017 |
| Gorton Ltd | Wholesale & retail | 2017 |
| Gould & Co Limited | Professional & scientific | 2005 |
| Gove Holdings Limited | Financial services | 2026 |
| Gove Marble Limited | Construction | 2001 |
| GPF Rail Limited | Construction | 2014 |
| Grab-It (SW) Limited | Water & waste | 2022 |
| Graham Audio Limited | Manufacturing | 2011 |
| Grand ARC Events Limited | Hospitality | 2026 |
| Grange Exclusive Homes Limited | Construction | 2012 |
| Grants Electrical Solutions Ltd | Construction | 2024 |
| Grap and Go Store Limited | Wholesale & retail | 2026 |
| Gray-Thompson & Company Limited | Wholesale & retail | 2014 |
| Grays Estate Administration Limited | Administrative & support | 2014 |
| Great Bengal Trading Limited | Wholesale & retail | 2025 |
| Great Rest Stays Ltd | Administrative & support | 2016 |
| Great Weeke Barns Limited | Hospitality | 1989 |
| Greatcoat Films Ltd. | Information & communication | 2011 |
| Greatcoat London Limited | Information & communication | 2019 |
| Greater Mobility Europe Limited | Wholesale & retail | 2010 |
| Greatscottcollectables Ltd | Wholesale & retail | 2020 |
| Green Agency Limited | Transport & logistics | 2019 |
| Green Contracts Limited | Transport & logistics | 2018 |
| Green Holdings (Landskerry) Limited | Real estate | 2018 |
| Green Moreton Limited | Financial services | 2021 |
| Green Star Manufacturing Company Limited | Other services | 1956 |
| Greenawell Farm Limited | Agriculture & fishing | 2023 |
| Greenawell Limited | Hospitality | 2025 |
| Greene Investment LLP | | 2023 |
| Greenhill Stone Ltd | Construction | 2020 |
| Greenleaze Properties (Bristol) Limited | Real estate | 1979 |
| Greenlight Commercial Limited | Financial services | 2019 |
| Greenlight Mortgages Limited | Professional & scientific | 2017 |
| Greenover Investments | Real estate | 1928 |
| Greenslade Blackawton Ltd | Construction | 2021 |
| Greenwood Spaces Ltd | Construction | 2021 |
| Grey Circles Limited | Extraterritorial | 2016 |
| Greyscale Insights Limited | Administrative & support | 2025 |
| Griffiths Industries Ltd | Construction | 2024 |
| Griffiths Veterinary Centre Ltd | Professional & scientific | 2023 |
| Griptrax Limited | Information & communication | 2015 |
| Grout Engineering Limited | Professional & scientific | 2024 |
| Grove Accounting Services Limited | Professional & scientific | 2025 |
| Growing Property Ltd | Real estate | 2020 |
| Grown Home Limited | Professional & scientific | 2021 |
| Grunfeld Fluid Dynamics Ltd. | Manufacturing | 2017 |
| Gryffydd John Ringe Architects Limited | Professional & scientific | 2003 |
| GS Joinery (Torquay) Ltd | Manufacturing | 2013 |
| GSD Care Limited | Administrative & support | 2010 |
| GSP Energy Solutions Limited | Professional & scientific | 2025 |
| Guest Anaesthetic Services Limited | Education | 2012 |
| Guest Business Solutions Limited | Water & waste | 2025 |
| Gunwhale Holdings Ltd | Administrative & support | 2019 |
| Gurkha Chef (Newton Abbot) Ltd | Hospitality | 2015 |
| Gurung Homes Limited | Real estate | 2020 |
| Guyer Properties Ltd | Real estate | 2023 |
| Gwenver Homes Limited | Construction | 2012 |
| Gymnasium Group Limited | Arts & recreation | 2017 |
| H & S Surveyors Limited | Real estate | 2008 |
| H Turpin Ltd | Extraterritorial | 2023 |
| H. & M. (Farmers) Limited | Agriculture & fishing | 1972 |
| H. C. Dayment & SON Services Limited | Manufacturing | 2008 |
| H.B.D. Floors Limited | Construction | 1952 |
| H.O.K. Construction (SW) Limited | Construction | 2016 |
| Haccombe Barns Limited | Households | 1998 |
| HAG Competitions Ltd | Wholesale & retail | 2025 |
| Hainoc Limited | Agriculture & fishing | 2004 |
| Hairstick Ltd | Manufacturing | 2023 |
| Hairwaves (South West) Limited | Other services | 2012 |
| Haldon Plant Limited | Administrative & support | 2009 |
| Halford Construction Ltd | Construction | 2025 |
| Hallway Ltd | Real estate | 2001 |
| Hamling Engineering Limited | Wholesale & retail | 2019 |
| Hammett Carpentry & Construction Limited | Construction | 2007 |