| Gadsby's of Southwell Limited | Manufacturing | 1985 |
| Gafi Dragons Ltd | Real estate | 2017 |
| Gaigals Limited | Other services | 2024 |
| Gainas Investments Limited | Real estate | 2011 |
| Gainsborough Home Improvements Limited | Construction | 2011 |
| Galaxy Pizza House Ltd | Hospitality | 2025 |
| Galaxyforge Ltd | Information & communication | 2024 |
| Galhealcare Ltd | Health & social care | 2016 |
| Galinis Transport Limited | Transport & logistics | 2015 |
| Gallafent-Tatam Trading Ltd | Wholesale & retail | 2024 |
| Gallant Style Ltd | Other services | 2018 |
| Gambit Software Ltd | Information & communication | 2024 |
| Game Engineering Limited | Manufacturing | 1984 |
| Game Holdings Limited | Manufacturing | 1987 |
| Game Saints Holdings Limited | Financial services | 2024 |
| Game Saints Lincoln Limited | Arts & recreation | 2024 |
| Game Saints Sheffield Limited | Arts & recreation | 2024 |
| Gamecycle Ltd | Administrative & support | 2020 |
| Gamelayer Limited | Information & communication | 2025 |
| Gamex Ltd | Wholesale & retail | 2025 |
| Ganderson Group Ltd | Professional & scientific | 2015 |
| Ganm Limited | Real estate | 2023 |
| Garden Life Ltd | Wholesale & retail | 2011 |
| Gardenfield Store Ltd | Wholesale & retail | 2016 |
| Gardner & Co Accountants Ltd | Professional & scientific | 2003 |
| Garfoot Project Services Ltd | Administrative & support | 2011 |
| Garner Property Care Limited | Administrative & support | 2013 |
| Garr Limited | Real estate | 2012 |
| Garrett Rise Residents Management Company Limited | Real estate | 2017 |
| Garriboli Paediatric Urology Limited | Health & social care | 2020 |
| Garrick Housing Limited | Real estate | 2024 |
| Garrod Electrical Services Ltd | Construction | 2020 |
| Garry Swain Professional Services Ltd | Transport & logistics | 2012 |
| Gary Fisher Bricklaying Ltd | Construction | 2024 |
| Gary IAN Phillips Ltd | Professional & scientific | 2011 |
| Gary Stans' Maintenance Services Ltd | Manufacturing | 2015 |
| Gary Taylor Tree Services Limited | Administrative & support | 2022 |
| GAS & Bone Limited | Health & social care | 2024 |
| GAS and Air Solutions Ltd | Construction | 2023 |
| GAS Turbine Efficiency Limited | Manufacturing | 2005 |
| GAS Turbine Engineering Limited | Professional & scientific | 2002 |
| GAS Turbine Resources Limited | Manufacturing | 2010 |
| Gascoigne Ltd | Wholesale & retail | 2013 |
| Gashouse Services Limited | Construction | 2002 |
| Gaskell Clarke IT Ltd | Information & communication | 2016 |
| Gastrodoc Ltd | Health & social care | 2017 |
| Gastronomico Ltd | Hospitality | 2022 |
| Gateros Plating Limited | Wholesale & retail | 2013 |
| Gates Macbain Associates Limited | Education | 2007 |
| Gateway Automation (Holdings) Limited | Financial services | 2016 |
| Gateway Automation Limited | Manufacturing | 2004 |
| Gateway of Technology Limited | Information & communication | 2009 |
| Gatton Joinery Ltd | Manufacturing | 2016 |
| Gaughan Electrical Services Ltd | Construction | 2020 |
| Gauri Ltd | Information & communication | 2007 |
| Gavo Beauty Ltd | Wholesale & retail | 2024 |
| Gayler Properties Limited | Construction | 2017 |
| GB Decorators Ltd | Construction | 2026 |
| GB HR Limited | Professional & scientific | 2014 |
| GB Wind Ltd | Professional & scientific | 2022 |
| GBB Ceramic Tilers Limited | Construction | 2019 |
| GBC Security Ltd | Administrative & support | 2020 |
| GBR Recruitment Limited | Administrative & support | 2017 |
| GC Cabs Ltd | Transport & logistics | 2023 |
| GCI Global Ltd | Information & communication | 2022 |
| GD Thermocare Limited | Construction | 2025 |
| Gdmd Ltd | Transport & logistics | 2023 |
| GDN Cleaning Ltd | Administrative & support | 2025 |
| GE4ALL Ltd | Wholesale & retail | 2025 |
| Gearcare Solutions Ltd | Wholesale & retail | 2026 |
| Gede Services Limited | Health & social care | 2023 |
| GEE Plad Plan Limited | Professional & scientific | 2025 |
| Geecee (Market Rasen) Management Company Limited | Extraterritorial | 1992 |
| Gelder Group Holdings Limited | Professional & scientific | 2010 |
| Gelder Limited | Construction | 1993 |
| GEM Cars Limited | Wholesale & retail | 2014 |
| GEM Properties (Lincoln) Limited | Households | 2026 |
| Gemini Computer Systems Limited | Information & communication | 2001 |
| Gencroft Engineers Limited | Extraterritorial | 1999 |
| General Purpose AI Ltd | Extraterritorial | 2022 |
| Genetic Experts UK Ltd | Public administration | 2021 |
| Genpro Limited | Administrative & support | 2023 |
| Gentle Bill Demolition Ltd | Construction | 2025 |
| Gentle Release Therapy Ltd | Education | 2021 |
| Genuine Needs Ltd | Public administration | 2020 |
| Geobeat Consulting Limited | Information & communication | 2017 |
| Geobuild Developments Limited | Construction | 2021 |
| Geoffrey Estates Limited | Real estate | 2019 |
| Geoffrey P Taylor Ltd | Real estate | 2011 |
| Geofresh Ltd | Hospitality | 2012 |
| George Shuttleworth Limited | Professional & scientific | 2000 |
| Georgina Gold Fine Art Ltd | Professional & scientific | 2018 |
| Gershwyn Ltd | Transport & logistics | 2024 |
| GET Fit HIT Ltd | Manufacturing | 2026 |
| GET Safe Online Limited | Information & communication | 2005 |
| Getan Global Advisory Ltd | Transport & logistics | 2025 |
| GETBACK2U Limited | Health & social care | 2022 |
| Getchiky Limited | Real estate | 2024 |
| Gfjh Properties Ltd | Real estate | 2022 |
| Gfsl Ltd | Transport & logistics | 2021 |