| Gnix Fitness Limited | Arts & recreation | 2024 |
| GNS Associates Limited | Professional & scientific | 2012 |
| GNS Associates UK LLP | | 2019 |
| GNS Management Limited | Real estate | 2004 |
| Gnss Ruler Ltd | Administrative & support | 2023 |
| Go Car Finance Ltd | Wholesale & retail | 2025 |
| Go Car Plan Ltd | Wholesale & retail | 2020 |
| Go Kitchens Uxbridge Ltd | Real estate | 2022 |
| GOB Ltd | Health & social care | 2026 |
| GOING2PASS Ltd | Education | 2026 |
| Goju RYU Karate Kobudo Ltd | Professional & scientific | 2018 |
| Golak Construction Ltd | Construction | 2024 |
| Gold & Green UK Limited | Wholesale & retail | 2011 |
| Gold Care Developments Limited | Construction | 2017 |
| Gold Care Hotels Limited | Real estate | 2006 |
| Gold Care Management Services Ltd | Administrative & support | 2004 |
| Gold Health Ltd | Health & social care | 2026 |
| Gold Solutions Ltd | Wholesale & retail | 2018 |
| Golden AGE Group Ltd. | Information & communication | 2016 |
| Golden Care (UK) Limited | Health & social care | 2005 |
| Golden Flight Limited | Financial services | 2010 |
| Golden Horses Contractors Ltd | Construction | 2024 |
| Golden Phoenix Interactive 786 Ltd | Other services | 2022 |
| Golden Valley Homecare Agency Ltd | Administrative & support | 2022 |
| Golden WOK & FRY Ltd | Hospitality | 2026 |
| Goldhawk Bridge Restoration Limited | Construction | 2012 |
| Goldray Music Limited | Arts & recreation | 2016 |
| Goldsmith Tax Accountants Limited | Professional & scientific | 2020 |
| Goldstar Clubs Limited | Administrative & support | 2024 |
| Goldstar Express Limited | Education | 2018 |
| Golesz Holdings Limited | Administrative & support | 2024 |
| Golf Environmental (UK) Limited | Construction | 2014 |
| Golf Environmental Limited | Construction | 2013 |
| Gomms Wood House Management Limited | Households | 2003 |
| Gomunshi UK Ltd | Information & communication | 2019 |
| Good Contact Limited | Construction | 2014 |
| Good Day Property Limited | Real estate | 2024 |
| Good Funeral Guide CIC | Information & communication | 2011 |
| Good News Holidays Limited | Administrative & support | 1997 |
| Goods Galaxzee Ltd | Wholesale & retail | 2025 |
| Goose Green (Flitwick) Management Company Limited | Households | 2011 |
| Gooseacre Limited | Construction | 2022 |
| Gordons Film Services Ltd | Professional & scientific | 2024 |
| Gorse Lane Properties (Camberley) Limited | Administrative & support | 2005 |
| Gosai Automation Limited | Information & communication | 2023 |
| Goshen Consortium Limited | Construction | 2015 |
| Goshen First Limited | Health & social care | 2015 |
| GOT the Motion Ltd | Hospitality | 2022 |
| Gourgion Ltd | Arts & recreation | 2021 |
| Gouri Prestige Ltd | Wholesale & retail | 2026 |
| Gourmet Ice Cream Services Ltd | Hospitality | 2026 |
| GPT Carpentry Ltd. | Construction | 2015 |
| GQ London Ltd | Real estate | 2018 |
| GR Bottling Holdings UK Limited | Financial services | 2016 |
| Grace Films Ltd | Information & communication | 2019 |
| Gracey's Garms Ltd | Wholesale & retail | 2025 |
| Gradewell Group Ltd | Administrative & support | 2020 |
| Graduate Direct Limited | Education | 2020 |
| Grady Property Investments Ltd | Real estate | 2021 |
| Grainger Bower Windows Limited | Other services | 2007 |
| Graith Limited | Construction | 1995 |
| Grammartorial Limited | Education | 2022 |
| Grand Hospitality Tech Ltd | Information & communication | 2026 |
| Grandata Limited | Real estate | 1981 |
| Grangeglen Limited | Real estate | 1994 |
| Granitech Construction Ltd | Construction | 2025 |
| GRANITES4U Limited | Manufacturing | 2011 |
| Granny Cafe Ltd | Hospitality | 2025 |
| Grantdillo Ltd | Information & communication | 2025 |
| Granville Food to Go Limited | Hospitality | 2013 |
| Granz Ltd | Wholesale & retail | 2021 |
| Grape N Vine Ltd | Wholesale & retail | 2026 |
| Graphisoft UK Limited | Information & communication | 1978 |
| Gravitas Sales Associates Limited | Professional & scientific | 2008 |
| Gravoart Ltd | Wholesale & retail | 2016 |
| Graysmark Film Services Ltd | Information & communication | 2023 |
| Great Escapes & Beyond Limited | Other services | 2025 |
| Great Haulage Limited | Transport & logistics | 2016 |
| Great Invest Ltd | Real estate | 2021 |
| Great London Stone Ltd | Real estate | 2021 |
| Great Supply Ltd | Wholesale & retail | 2026 |
| Great Three Stars Ltd | Hospitality | 2024 |
| Greater London GAS Ltd | Construction | 2015 |
| Greek Caretta Limited | Hospitality | 2025 |
| Greek Garden Limited | Hospitality | 2025 |
| Green Building Projects Ltd | Financial services | 2021 |
| Green Cafe (Denham) Ltd | Hospitality | 2017 |
| Green Clean Electrics Limited | Construction | 2023 |
| Green Corns Ltd. | Health & social care | 2000 |
| Green GEM Ltd | Real estate | 2016 |
| Green HAT World Ltd | Wholesale & retail | 2024 |
| Green Life Buildings Ltd | Manufacturing | 2018 |
| Green Miles Chauffeurs Ltd | Transport & logistics | 2012 |
| Green Services & Solutions Ltd | Health & social care | 2020 |
| Green Soft Technologies Ltd | Information & communication | 2016 |
| Green Tiles Freehold Limited | Households | 2017 |
| Green Tiles RTM Company Limited | Households | 2004 |
| Greenbase Properties Limited | Real estate | 1989 |
| Greenfi Energy Ltd | Professional & scientific | 2025 |
| Greenfields Adolescent Development Limited | Health & social care | 2000 |