| G Kidd RGN Limited | Health & social care | 2017 |
| G M Rollerskating Limited | Arts & recreation | 2005 |
| G M Treble Holdings Limited | Professional & scientific | 2012 |
| G N Concrete Flooring Ltd | Construction | 2023 |
| G N G Holdings Limited | Professional & scientific | 2009 |
| G N Hart Flooring Limited | Construction | 2024 |
| G P Brookes Consultancy Services Ltd. | Administrative & support | 2010 |
| G P Consultants Limited | Professional & scientific | 2002 |
| G P Group Holdings Ltd | Manufacturing | 2025 |
| G P Salads Limited | Wholesale & retail | 2008 |
| G R 8 Building Solutions Ltd | Construction | 2017 |
| G S and a Chaggar Limited | Construction | 2013 |
| G S BAL Transport Ltd | Transport & logistics | 2021 |
| G S Chadha Vision Clinic Ltd | Health & social care | 2012 |
| G S Construction (Midlands) Limited | Construction | 2013 |
| G S News Express Ltd | Wholesale & retail | 2020 |
| G S Tucker Ltd | Construction | 2018 |
| G Singh Property Investments Limited | Real estate | 2021 |
| G T Railway Maintenance Limited | Transport & logistics | 1994 |
| G Walker Electrical Ltd | Construction | 2023 |
| G&B Transport Limited | Transport & logistics | 2024 |
| G&D Real Estates Ltd | Real estate | 2025 |
| G&G Group Ltd | Real estate | 2021 |
| G&G Housing Ltd | Real estate | 2021 |
| G&G Residential Park Group Ltd | Construction | 2023 |
| G&H Kaur Limited | Real estate | 2023 |
| G&H Property Solutions Ltd | Real estate | 2024 |
| G&K Transport Ltd | Transport & logistics | 2023 |
| G&L Glow Limited | Wholesale & retail | 2026 |
| G&W Property Ltd | Real estate | 2023 |
| G-Thoms Services Limited | Wholesale & retail | 2024 |
| G-Thoms Support Services Limited | Information & communication | 2024 |
| G. Brady & Company (Scotland) Limited | Professional & scientific | 1921 |
| G. Horton Limited | Wholesale & retail | 1967 |
| G.B Vantage Ltd | Wholesale & retail | 2023 |
| G.E.T. Training Limited | Construction | 2005 |
| G.F. Roberts (Farms) Limited | Agriculture & fishing | 1953 |
| G.G. Cade Technologies Limited | Other services | 2002 |
| G.K. Transport Limited | Transport & logistics | 1992 |
| G.M. Treble Limited | Wholesale & retail | 1966 |
| G.M.T Holdings Ltd | Real estate | 2023 |
| G.Mann Estates Ltd | Real estate | 2026 |
| G.N. Grosvenor Limited | Wholesale & retail | 1979 |
| G.P.B. Associates Limited | Professional & scientific | 1997 |
| G.S. Express Couriers Ltd | Transport & logistics | 2023 |
| G.S.G Brothers Limited | Households | 2021 |
| G.Sb Courier Limited | Transport & logistics | 2023 |
| G.V. Estates Limited | Real estate | 2002 |
| G1 Investments Ltd | Real estate | 2024 |
| G13 Construction Ltd | Construction | 2010 |
| G2 Service and Maintenance Limited | Administrative & support | 2016 |
| G50.20 Ltd | Information & communication | 2024 |
| G9 Realty Ltd | Households | 2025 |
| GA Clinics Ltd | Health & social care | 2024 |
| GAB Engineering Ltd | Construction | 2026 |
| Gab-Ella Care Limited | Wholesale & retail | 2024 |
| Gabitie Fabricated Solutions Limited | Manufacturing | 2017 |
| Gabitie Group Limited | Manufacturing | 2012 |
| Gabriel Automotive Ltd | Transport & logistics | 2015 |
| Gabz Executive Travel Limited | Administrative & support | 2024 |
| GAD Real Estate Ltd | Real estate | 2024 |
| Gadgethowler Ltd | Administrative & support | 2019 |
| Gadgetronics Limited | Wholesale & retail | 2021 |
| GAF Marchand Properties Limited | Real estate | 2024 |
| Gaflo Solutions Limited | Professional & scientific | 2014 |
| Gaforzic Ltd | Administrative & support | 2024 |
| GAG Empire Ltd | Public administration | 2023 |
| Gagandeep Uppal Limited | Health & social care | 2020 |
| Gait Subsidiary Ltd | Extraterritorial | 2025 |
| GAJ Records Ltd | Information & communication | 2023 |
| Galaxy Estate Ltd | Real estate | 2009 |
| Galaxy Nova Pro Ltd | Wholesale & retail | 2026 |
| Galaxy of Books Limited | Wholesale & retail | 2024 |
| Gallagher Consultants Limited | Construction | 2025 |
| Gallant Group Limited | Administrative & support | 2017 |
| Galleria Wanda Limited | Wholesale & retail | 2003 |
| Gallones Events Limited | Manufacturing | 2025 |
| Gallones Limited | Manufacturing | 2025 |
| Gambell Investments Limited | Real estate | 2018 |
| Gaming Dynamics Limited | Wholesale & retail | 2020 |
| Gamuur Limited | Health & social care | 2025 |
| Gana House Limited | Real estate | 2024 |
| Ganapathi Ltd | Real estate | 2025 |
| Gandonou Group Ltd | Wholesale & retail | 2025 |
| Gannahs Farm (Oak Hayes) Management Company Limited | Households | 1983 |
| GAP Learning Ltd | Education | 2025 |
| Gapeless Ltd | Wholesale & retail | 2018 |
| Garage 55 Ltd | Wholesale & retail | 2025 |
| Garage Equipment (Nationwide) Limited | Wholesale & retail | 2012 |
| Garage Equipment UK Limited | Other services | 2003 |
| Garages 2 LET Limited | Real estate | 2014 |
| Garandam Limited | Hospitality | 2006 |
| Garanday Limited | Hospitality | 1999 |
| Garcha Entertainments Ltd | Real estate | 2017 |
| Gardiner Family Properties Limited | Real estate | 2025 |
| Garibs Barber Ltd | Other services | 2024 |
| Garikai Homes Ltd | Real estate | 2025 |
| Garland Investment Holdings Ltd | Financial services | 2025 |
| Garlands Properties Ltd | Real estate | 2025 |
| Garpeer Ltd | Transport & logistics | 2021 |