| G&R Essentials Ltd | Wholesale & retail | 2026 |
| G-Force Europe.Com Ltd | Administrative & support | 2013 |
| G. Reuthe Limited | Wholesale & retail | 1930 |
| G.D Renovations Ltd | Construction | 2025 |
| G.H. Frecknall & Company Limited | Wholesale & retail | 1998 |
| G.O Chimney Services Ltd | Administrative & support | 2025 |
| GA Access Ltd | Extraterritorial | 2024 |
| GA Accountants Ltd | Professional & scientific | 2021 |
| Gaby&Sons Ltd | Construction | 2022 |
| Gadjora Trans International Ltd | Transport & logistics | 2018 |
| Gafe Transport Ltd | Transport & logistics | 2023 |
| Gakecuru Ltd | Health & social care | 2021 |
| Galactic Salmon Limited | Professional & scientific | 2023 |
| Gales Plumbing Ltd | Construction | 2023 |
| Gallarwood Catering Ltd | Hospitality | 2018 |
| Gallay Limited | Manufacturing | 1997 |
| Ganatra & Co Ltd | Information & communication | 2010 |
| Ganatra Holdings Ltd | Financial services | 2022 |
| Ganatra Property Investments Limited | Hospitality | 2022 |
| Gapa Events Ltd | Hospitality | 2023 |
| Gardiner Motors Limited | Wholesale & retail | 2006 |
| Gareth W Limited | Construction | 2014 |
| Garimella Physio Limited | Health & social care | 2021 |
| Garry Dearman Ltd | Construction | 2014 |
| Gary Osborne Studio & Consulting Limited | Professional & scientific | 2025 |
| GAS MEC Ltd | Construction | 2025 |
| Gastro Glide Limited | Hospitality | 2024 |
| Gateway Logistics International (GLI) Ltd | Transport & logistics | 2025 |
| Gazelle Investments Limited | Financial services | 1992 |
| GB Access Platforms Ltd | Administrative & support | 2002 |
| GB Automotive Products Limited | Wholesale & retail | 2016 |
| GCK Treeworks Ltd | Agriculture & fishing | 2015 |
| GDF Contracts Limited | Construction | 2026 |
| GDF Roofing Limited | Construction | 2020 |
| GDP Foods Ltd | Hospitality | 2015 |
| GEB Trans Limited | Transport & logistics | 2024 |
| Gecone Ltd | Transport & logistics | 2023 |
| Gee-Taverns Ltd | Hospitality | 2017 |
| Geeky FOX CRM Solutions Ltd | Professional & scientific | 2024 |
| Geemac Global Ltd | Financial services | 2026 |
| GEM MED Aesthetics Ltd | Other services | 2025 |
| Gemini Design & Build Ltd | Construction | 2023 |
| Gemini Management Ltd | Financial services | 2021 |
| Geneva Lights Ltd | Health & social care | 2019 |
| Genius Drylining Ltd | Construction | 2024 |
| Genki Holdings Ltd | Financial services | 2023 |
| Gentle Sleep Pet Services Ltd | Professional & scientific | 2024 |
| Geometra Limited | Other services | 2004 |
| George James Business Systems Limited | Information & communication | 2000 |
| George'A Ltd | Agriculture & fishing | 2022 |
| Georgiana Luxury Florist Ltd | Wholesale & retail | 2017 |
| Geovaly Ltd | Construction | 2015 |
| Geraughty Resources Limited | Financial services | 2014 |
| GEV Transport Ltd | Transport & logistics | 2024 |
| GF Books Ltd | Information & communication | 2011 |
| GFL Consulting Limited | Professional & scientific | 2024 |
| GFM (UK) Limited | Manufacturing | 1992 |
| GG Chituri Ltd. | Transport & logistics | 2014 |
| GG-157-970 Limited | Real estate | 2022 |
| GGK Property Investment Ltd | Real estate | 2026 |
| GHT Specialist Solutions Ltd | Financial services | 2015 |
| Giant Booker Limited | Extraterritorial | 1900 |
| Giant Midco Limited | Extraterritorial | 2004 |
| Gibsons Haulage Limited | Transport & logistics | 2000 |
| Giftshubstore Ltd | Wholesale & retail | 2023 |
| Gifty's Childcare Limited | Health & social care | 2019 |
| Gigabit Group Ltd | Administrative & support | 2019 |
| Gilbert + Crick Ltd | Professional & scientific | 2014 |
| Gilbertn Ltd | Transport & logistics | 2025 |
| Ginger Tree Marketing Limited | Professional & scientific | 2014 |
| Giraffe Property Services Ltd | Real estate | 2025 |
| Giraffinarium Ltd | Real estate | 2024 |
| GJS Fencing Contractors Limited | Construction | 2026 |
| Gladix Ltd | Health & social care | 2023 |
| Glamour Divine Ltd | Wholesale & retail | 2021 |
| Glass Showcases Limited | Wholesale & retail | 2025 |
| Glazereach Marketing Ltd | Professional & scientific | 2026 |
| Glazerite (Northwest) Ltd | Manufacturing | 2015 |
| Glazerite (South) Ltd | Manufacturing | 2015 |
| Glazerite (Southwest) Ltd | Manufacturing | 2015 |
| Glazerite Windows Limited | Manufacturing | 2000 |
| Glebeland Developments Limited | Construction | 1997 |
| Gleneagle Solutions Limited | Information & communication | 2005 |
| Gleneagles Domestic Appliances Limited | Construction | 2021 |
| Glenfield Investments Limited | Wholesale & retail | 2010 |
| Glenmore Business Support Limited | Administrative & support | 2008 |
| Glenmore Estates Limited | Real estate | 2019 |
| Glenvale Care Limited | Health & social care | 2025 |
| Glenview Harrison Ltd | Professional & scientific | 2026 |
| Glideinn Ltd | Real estate | 2024 |
| Global Cutting Technologies (Service) Limited | Wholesale & retail | 2002 |
| Global Cutting Technologies Limited | Wholesale & retail | 1998 |
| Global Delivery Solutions Ltd | Wholesale & retail | 2009 |
| Global Installs Limited | Construction | 2016 |
| Globe Xtra UK Ltd | Construction | 2020 |
| Glory Global Trading Ltd | Wholesale & retail | 2026 |
| Glue Dots International Limited | Manufacturing | 2000 |
| GM Polishing & Linishing Limited | Professional & scientific | 2007 |
| GMC Groundworks Ltd | Construction | 2016 |
| Go Auto Limited | Wholesale & retail | 2025 |