| Gentian Special Projects Limited | Real estate | 2012 |
| Gentian Trafalgar Limited | Real estate | 2016 |
| Gents T CUT Ltd | Other services | 2026 |
| Genuine Impact Ltd | Information & communication | 2018 |
| Geoblocks Digital Assets Limited | Extraterritorial | 2025 |
| Geoblocks Global Administration Services Limited | Professional & scientific | 2019 |
| Geoblocks Gold Mines Limited | Extraterritorial | 2025 |
| Geof L Driving School Ltd | Education | 2024 |
| Geola Media Limited | Information & communication | 2024 |
| Geoquest Solutions Ltd | Real estate | 2025 |
| George Baker (Camping) Limited | Wholesale & retail | 1976 |
| George Bexley 9143 Limited | Real estate | 2024 |
| George Greening Marketing Limited | Administrative & support | 2013 |
| Georgiev Windows Ltd | Construction | 2026 |
| Georgina Mead Events Limited | Administrative & support | 2026 |
| Gepix Ltd | Transport & logistics | 2011 |
| Gepp & Sons LLP | | 2013 |
| Gepp & Sons Services Limited | Professional & scientific | 2004 |
| Gepp & Sons Solicitors LLP | | 2015 |
| Gepp Legal Services Limited | Professional & scientific | 2014 |
| Gerards Place Management Limited | Households | 2011 |
| Gestingthorpe's Limited | Other services | 2019 |
| GET in the Swim Limited | Education | 2025 |
| GET Rite Auto Services Limited | Wholesale & retail | 2003 |
| GET YOU GET Others Ltd | Health & social care | 2021 |
| GET Your BIZ Seen Limited | Administrative & support | 2024 |
| GET Your SAX Together Limited | Education | 2022 |
| GFG Management Ltd | Professional & scientific | 2025 |
| Gfms (Midlands) Limited | Construction | 1991 |
| GFX Solutions House Limited | Professional & scientific | 2024 |
| Ggcon Investment Ltd | Real estate | 2026 |
| GGG Equestrian Limited | Education | 2020 |
| Gharaonda Ltd | Real estate | 2024 |
| Ghost Enterprises Ltd | Information & communication | 2013 |
| Ghost Light Studios Ltd | Arts & recreation | 2007 |
| Ghost Limited | Other services | 2023 |
| GHS Direct Limited | Manufacturing | 1992 |
| GHT Property Ltd | Real estate | 2017 |
| GHW Property Services Limited | Construction | 2020 |
| Giant AE Limited | Health & social care | 2026 |
| Giant Chelmsford Limited | Wholesale & retail | 2007 |
| Gibbs Family Holdings Ltd | Real estate | 2024 |
| Gidkechtech Limited | Information & communication | 2017 |
| Gift Courses LLP | | 2015 |
| Gift of Sound Ltd | Wholesale & retail | 2011 |
| Giggle and Goods Limited | Wholesale & retail | 2025 |
| Giles Tuker Limited | Agriculture & fishing | 1953 |
| Gilon (Essex) Ltd | Professional & scientific | 2015 |
| Gimbiya Magic Care Ltd | Health & social care | 2026 |
| Gina Fashion and Dream Decor Events Ltd | Wholesale & retail | 2019 |
| Gina Ironing Ltd | Other services | 2024 |
| Ginette Sibley Limited | Professional & scientific | 2009 |
| Ginger Spider Limited | Real estate | 2024 |
| Giri Stones Ltd | Wholesale & retail | 2009 |
| Girls WHO Bank CIC | Education | 2024 |
| Gisborne Napier Ltd | Other services | 2015 |
| Gistramag Limited | Real estate | 2004 |
| Giv.Solutions Limited | Construction | 2019 |
| Gizmo Bars Ltd | Extraterritorial | 2024 |
| GJ Carswell Ltd | Construction | 2015 |
| GJC Consultancy Ltd | Professional & scientific | 2024 |
| GJM (UK) Holdings Limited | Financial services | 2024 |
| GJO Electrical Limited | Construction | 2016 |
| GKC Kennels Limited | Other services | 2012 |
| GKS Tree Care Ltd | Administrative & support | 2020 |
| Gksr Consult Limited | Professional & scientific | 2018 |
| GL Infotech Ltd | Information & communication | 2023 |
| Glacier Leisure Ltd | Arts & recreation | 2021 |
| Glamfern Limited | | 1985 |
| Glammed House Ltd | Wholesale & retail | 2024 |
| Glamstore Limited | Wholesale & retail | 2025 |
| Glanmor Properties Ltd | Real estate | 2022 |
| Glass Brook Holdings Limited | Financial services | 2023 |
| Glaube Consultancy Ltd | Information & communication | 2017 |
| Glaube Foods Ltd | Wholesale & retail | 2023 |
| Glaube Ltd | Wholesale & retail | 2022 |
| Glava Trans Ltd | Transport & logistics | 2017 |
| Glazeme Limited | Construction | 2011 |
| Gleamology Ltd | Administrative & support | 2026 |
| Glee Management Services Limited | Administrative & support | 2022 |
| Glenamel Healthcare Ltd | Administrative & support | 2018 |
| Glenavon Care Limited | Health & social care | 2013 |
| Glenavon Group Limited | Health & social care | 2018 |
| Glenavon Kelvedon Developments Limited | Real estate | 2018 |
| Glenavon Lodge Limited | Administrative & support | 1990 |
| Glenavon Residential Care Limited | Health & social care | 2021 |
| Glenbridge Property Company Limited | Real estate | 2002 |
| Glenco Group Limited | Transport & logistics | 2018 |
| Glendale Creative Limited | Professional & scientific | 2011 |
| Glennie’S Tree Services Ltd | Agriculture & fishing | 2025 |
| Glennleigh Commercial Limited | Real estate | 2010 |
| Glitzy Cleaning Services Ltd | Administrative & support | 2023 |
| Global Audit Platform Limited | Other services | 2015 |
| Global Bangla Ltd | Information & communication | 2025 |
| Global Clinical Research Ltd | Professional & scientific | 2019 |
| Global Clinical Services Limited | Administrative & support | 2023 |
| Global Early Careers Ltd | Administrative & support | 2025 |
| Global Environmental Consultancy Limited | Professional & scientific | 2006 |
| Global Foods Square Ltd | Wholesale & retail | 2025 |
| Global Healthcare Analytics Ltd | Professional & scientific | 2019 |