| Glenwood Interiors Limited | Wholesale & retail | 2003 |
| GLF Procurement Professional Services Limited | Professional & scientific | 2012 |
| Gliss Audio Limited | Extraterritorial | 2018 |
| Global Empathy Solutions Ltd | Professional & scientific | 2026 |
| Global Physical Commodities Ltd | Financial services | 2026 |
| Global Real Estate Data Limited | Real estate | 2023 |
| Global Safety Bureau Ltd | Information & communication | 2025 |
| Global Testing Labs Limited | Extraterritorial | 2017 |
| Globe Commercial Buildings Ltd | Construction | 2023 |
| Glowworm Coaching Limited | Education | 2025 |
| GLW Feeds Limited | Manufacturing | 1952 |
| Glympton Construction Ltd | Construction | 2016 |
| Glympton Holdings Limited | Financial services | 2020 |
| Glympton Limited | Extraterritorial | 2020 |
| Glympton Plant Limited | Administrative & support | 2020 |
| Glyn Jones Racing Limited | Arts & recreation | 1999 |
| GM Data Communications Ltd | Construction | 2010 |
| GM Joinery and Building Contractor Limited | Construction | 2022 |
| GMA Property Investments Ltd | Real estate | 2022 |
| Gmth Properties Limited | Real estate | 2021 |
| GMV Holdings Ltd | Wholesale & retail | 2023 |
| GNR8 Academy C.I.C. | Arts & recreation | 2019 |
| Go Cleaning Ltd | Administrative & support | 2007 |
| Go Maintenance Limited | Construction | 2007 |
| Go Websites Limited | Information & communication | 2014 |
| Gobbies Flapjack Limited | Manufacturing | 2022 |
| Godolphin Management Group Ltd | Professional & scientific | 2023 |
| Gogocargo Ltd | Transport & logistics | 2024 |
| Gohan Food Ltd | Hospitality | 2022 |
| Gohill Holdings Limited | Financial services | 2016 |
| Gold Town Loughborough Ltd | Wholesale & retail | 2024 |
| Golden 1 Scissors Ltd | Other services | 2025 |
| Golden Kitchen KE Ltd | Hospitality | 2025 |
| Golden Thread Fire Delay Ltd | Other services | 2003 |
| Golden Thread Fire Limited | Construction | 2018 |
| Goldilocks Houses Limited | Real estate | 2020 |
| Golf Gear Ltd | Arts & recreation | 2007 |
| Good 2 Know Limited | Real estate | 2024 |
| Good Good Things Ltd | Manufacturing | 2020 |
| Good Health TCM L'Boro Clinic Ltd. | Health & social care | 2017 |
| Good News Bookshop Ltd | Wholesale & retail | 2021 |
| Good Samaritans Care Limited | Health & social care | 2016 |
| Goodwin Medical Limited | Health & social care | 2014 |
| Goodworks Ventures Ltd | Professional & scientific | 2016 |
| Googie's Flowers Limited | Wholesale & retail | 2017 |
| Goose Ashby Limited | Wholesale & retail | 2016 |
| Goosen Ventures Limited | Professional & scientific | 2021 |
| Gorse Covert Community Association Limited | Administrative & support | 2004 |
| Gorse Covert Dental Practice Ltd | Health & social care | 2009 |
| GOS Homes Ltd | Real estate | 2022 |
| Gospel Shaped Limited | Administrative & support | 2026 |
| Gossama Ltd | Information & communication | 2015 |
| Gough Road Properties Limited | Financial services | 2019 |
| Gouranga Estates Limited | Real estate | 2025 |
| Gourmy Ltd | Wholesale & retail | 2025 |
| Gova Housing Limited | Real estate | 2026 |
| Gowri Consultants Limited | Information & communication | 2012 |
| Gowrie Locomotive Co Ltd | Extraterritorial | 2018 |
| Goya (Broomhill) Limited | Construction | 2019 |
| Goya Developments (Egham) Limited | Professional & scientific | 2014 |
| Goya Developments (Orpington) Limited | Professional & scientific | 2014 |
| Goya Developments (Rutland) Ltd | Professional & scientific | 2015 |
| Goya Developments London Ltd | Professional & scientific | 2011 |
| Goya Lyddington Ltd | Construction | 2017 |
| Gozza Derby Mini Market Ltd | Wholesale & retail | 2025 |
| GR Lilley Consulting Limited | Administrative & support | 2010 |
| Grab & Go International Ltd | Wholesale & retail | 2025 |
| Grabs R US NW Ltd | Transport & logistics | 2025 |
| Graff Richardson Limited | Real estate | 2024 |
| Graffio Arts Ltd | Wholesale & retail | 2018 |
| Graham & Alison Jelley Ltd | Financial services | 2026 |
| Graham Pirt Associates Limited | Public administration | 2014 |
| Granby Lounge Ltd | Hospitality | 2026 |
| Granby Rest Ltd | Hospitality | 2025 |
| Grand Union View Management Company Limited | Households | 2018 |
| Grange Developments (Midlands) Ltd. | Construction | 1997 |
| Grange Education Ltd | Education | 2025 |
| Grange Properties (Midlands) Limited | Construction | 2004 |
| Grangewater Limited | Professional & scientific | 2011 |
| Granted Perfection Ltd | Administrative & support | 2025 |
| Grantham Karate Limited | Arts & recreation | 2014 |
| Gravity Automation Ltd | Construction | 2021 |
| Greasley Electronics Limited | Manufacturing | 1985 |
| Great Barr Cars Limited | Transport & logistics | 2024 |
| Great Britain Wheelchair Basketball Association | Arts & recreation | 2011 |
| Great Britain Wheelchair Basketball Trading Limited | Arts & recreation | 2025 |
| Great Business Matters Limited | Professional & scientific | 2017 |
| Great Central Apartments Management Company Limited | Households | 2006 |
| Great Central Hotel Management Company Limited | Extraterritorial | 2011 |
| Great Central Meats Limited | Manufacturing | 2014 |
| Great Central Railway Development Ltd | Construction | 2010 |
| Great Central Railway PLC | Transport & logistics | 1976 |
| Great Escape Games Publishing Limited | Manufacturing | 2022 |
| Greatbrisk Limited | Construction | 2003 |
| Green 4 Life Recycling Limited | Water & waste | 2008 |
| Green Bros. (Builders) Limited | Other services | 1940 |
| Green DOT Services Ltd | Construction | 2023 |
| Green Emerald Investments Ltd | Wholesale & retail | 2008 |
| Green Events LDN Ltd | Arts & recreation | 2026 |
| Green Meadow Limited | Water & waste | 1998 |