| Gentlemens Bedtime Stories Ltd | Information & communication | 2024 |
| Genuine Parts Trading Limited | Wholesale & retail | 2019 |
| George Bence & Sons (Properties) Limited | Construction | 2017 |
| George Bence & Sons Limited | Wholesale & retail | 1899 |
| George Catley Limited | Wholesale & retail | 2001 |
| George Installation Services Limited | Construction | 2010 |
| George-Stone Gardens Limited | Administrative & support | 2013 |
| Georgia Entertainments Limited | Arts & recreation | 2017 |
| Georgian.T.Uk Ltd | Transport & logistics | 2018 |
| Georgina Loxley Ltd | Wholesale & retail | 2026 |
| Georgina Rose Properties Ltd | Real estate | 2025 |
| Geotech Assist Ltd | Information & communication | 2024 |
| Germanworx Limited | Wholesale & retail | 2011 |
| Gervase Instruments Limited | Professional & scientific | 1964 |
| Gestra Holdings Limited | Financial services | 2018 |
| Gestra UK Limited | Manufacturing | 2017 |
| GET AI Powers Ltd | Other services | 2025 |
| GET Coaching Limited | Arts & recreation | 2018 |
| GET in Front Ltd | Professional & scientific | 2026 |
| GET in the Pool Ltd | Information & communication | 2014 |
| GET Lucky Inc Ltd | Manufacturing | 2015 |
| GET SET Go Athletics Ltd | Education | 2022 |
| Gg's Professional Horse Transport Limited | Transport & logistics | 2014 |
| GH Imaging Limited | Health & social care | 2022 |
| GHF Consulting Ltd | Professional & scientific | 2013 |
| GHG Real Estate UK Limited | Real estate | 2018 |
| GHJ Gardiner Building Services Ltd | Construction | 2005 |
| Ghostsinthemachine Ltd | Extraterritorial | 2022 |
| Ghsm Limited | Professional & scientific | 2020 |
| Gianni Ristorante Ltd | Hospitality | 2009 |
| Giant Finance + Limited | Administrative & support | 2004 |
| Giant Finance Accounts Limited | Professional & scientific | 2024 |
| Giant Finance Holdings Limited | Professional & scientific | 2011 |
| Giant Finance Limited | Financial services | 2017 |
| Gibb Advisory Ltd | Professional & scientific | 2026 |
| Gibbs Gregory Limited | Administrative & support | 2018 |
| Gift Horse Ltd | Wholesale & retail | 2026 |
| Giga TCG Ltd | Wholesale & retail | 2026 |
| Giga Works Ltd | Construction | 2024 |
| Giggles Nursery Limited | Extraterritorial | 2010 |
| Gilbert Stirling LEE Limited | Administrative & support | 2016 |
| Gilbert's Pharma Ltd | Administrative & support | 2016 |
| Gilded Munch Luxury Food Services Ltd | Hospitality | 2025 |
| Gilders Transport Limited | Transport & logistics | 1986 |
| Giles Tedstone Limited | Agriculture & fishing | 1974 |
| Gillard Construction Ltd | Other services | 2016 |
| Gillette Minerals Ltd | Mining & quarrying | 2026 |
| Gillian Kenny Associates Ltd | Professional & scientific | 2000 |
| Gillingham and Co Limited | Construction | 2024 |
| Gills Property Group Ltd | Real estate | 2025 |
| Gilmour and Gray Limited | Information & communication | 2013 |
| Gilmour Consulting Ltd | Professional & scientific | 2023 |
| GIN Alchemy Limited | Manufacturing | 2019 |
| Ginger Project Management Limited | Information & communication | 2025 |
| Ginger Shot Limited | Professional & scientific | 2014 |
| Ginger Snap Services Ltd | Construction | 2015 |
| Gingerline Media Limited | Information & communication | 2021 |
| Gingers Hair and Beauty Ltd | Other services | 2021 |
| Girls Don'T Productions Ltd | Arts & recreation | 2024 |
| GJ Black Consulting Ltd | Professional & scientific | 2020 |
| GJD Enterprises Limited | Health & social care | 2009 |
| GJD Financial Limited | Professional & scientific | 2022 |
| GJP Solutions Limited | Financial services | 2025 |
| Gjph Consulting Limited | Professional & scientific | 2024 |
| GK Equine Ltd | Manufacturing | 2026 |
| GKA MMR Holdings Ltd | Financial services | 2021 |
| GKO IT Services Limited | Information & communication | 2017 |
| GL 52 Barber Ltd | Other services | 2026 |
| GL Mobile Tyres Ltd | Transport & logistics | 2021 |
| GL Property Maintenance Ltd | Construction | 2013 |
| GL Romeo Tango Ltd | Administrative & support | 2021 |
| GL Spraying Ltd | Construction | 2021 |
| GL1 Holiday Lettings Limited | Hospitality | 2021 |
| GL50 Nails & Spa Ltd | Other services | 2023 |
| GL53 Property Limited | Administrative & support | 2020 |
| GL54 Decorators Ltd | Construction | 2023 |
| Glacier Point Limited | Other services | 2003 |
| Gladstone Gardens Management Company Ltd | Households | 2024 |
| Gladwell IT Limited | Information & communication | 2012 |
| Glamorous Hangups Ltd | Wholesale & retail | 2020 |
| Glamour Homes Ltd | Construction | 2024 |
| Glamplaunch Ltd | Manufacturing | 2025 |
| Glanenig Ltd | Health & social care | 2022 |
| Glanua Industrial UK Limited | Construction | 2015 |
| Glass Ltd | Wholesale & retail | 2019 |
| Glass Partitioning UK Ltd | Wholesale & retail | 2023 |
| Glassmoon Services Limited | Health & social care | 2019 |
| Glassworks Media Limited | Professional & scientific | 2022 |
| GLC Protection Advice Ltd | Financial services | 2026 |
| Gleaming Limited | Administrative & support | 2012 |
| Gleanin Ltd | Real estate | 2016 |
| Gleaston Solar and Battery Storage Limited | Energy | 2023 |
| Glebe Care Ltd | Health & social care | 1984 |
| Glebe Property Services Limited | Real estate | 2016 |
| Glencairn Court Limited | Households | 1962 |
| Glennex Limited | Real estate | 2020 |
| Glenowen Management Company Limited | Households | 1996 |
| Glenthorn Bloodstock Ltd | Other services | 2020 |
| Glenure Court (Cheltenham) Limited | Households | 1985 |
| Gleren Ltd | Professional & scientific | 2025 |