| G. M. Charlesworth & SON Limited | Extraterritorial | 2008 |
| G. Smith (Wooburn) Limited | Extraterritorial | 1946 |
| G.A. Projects (UK) Limited | Manufacturing | 2005 |
| G.F. Cook (Funerals) Limited | Extraterritorial | 1992 |
| G.F. Hunt (Bath) Limited | Extraterritorial | 1953 |
| G.R. Accountancy & Business Services Ltd. | Professional & scientific | 2012 |
| G11 Capital Limited | Wholesale & retail | 2017 |
| G28 Logistics Ltd | Transport & logistics | 2026 |
| G7 Property Solutions Ltd | Real estate | 2014 |
| GA Assets Ltd | Real estate | 2018 |
| GA Construction and Design Ltd | Construction | 2015 |
| Gabajee Companies Ltd | Professional & scientific | 2025 |
| Gable Ends Limited | Real estate | 2017 |
| Gabriel Maintenance Solution Ltd | Construction | 2011 |
| Gacha Claw UK Limited | Wholesale & retail | 2026 |
| GAD Construction Limited | Construction | 2026 |
| Gadwall Investments Limited | Real estate | 2017 |
| Gaffney Consulting Limited | Administrative & support | 2017 |
| Gainsborough Software Limited | Information & communication | 1990 |
| Galaxy Electrical Contractors Limited | Construction | 2024 |
| Galaxy Maintenance Limited | Households | 2013 |
| Gallagher Media Limited | Professional & scientific | 2014 |
| Gallier's Dairy Ltd | Wholesale & retail | 2019 |
| Galvanizers Association | Other services | 1989 |
| Gambles Limited | Hospitality | 2022 |
| Game Changer MGV Ltd | Hospitality | 2020 |
| Game Shooting UK Limited | Arts & recreation | 2023 |
| Gamota Deliveries Ltd | Transport & logistics | 2021 |
| Gandhewar Ltd | Health & social care | 2011 |
| GAO Homes Limited | Real estate | 2025 |
| Garai Medico Limited | Health & social care | 2025 |
| Garcha Transport Ltd | Transport & logistics | 2002 |
| Garden and Hire Spares Limited | Wholesale & retail | 2006 |
| Gardenbuyer Limited | Wholesale & retail | 2006 |
| Gardeners World and Building Supplies Limited | Administrative & support | 1988 |
| Gardensite LLP | | 2021 |
| Garfield Stephens Ltd | Administrative & support | 2015 |
| Garfield Stephens Property Ltd | Real estate | 2021 |
| Garima Investments Limited | Real estate | 2023 |
| Garima Ltd | Health & social care | 2022 |
| Garrick/Sigma Engineering Ltd | Professional & scientific | 2018 |
| Garvey Veterinary Services Ltd | Professional & scientific | 2025 |
| Gary Phelps Communications Ltd | Professional & scientific | 2018 |
| GAS Development Management Ltd | Construction | 2025 |
| GAS Service Inspection Ltd | Construction | 2020 |
| Gasgo Limited | Construction | 2020 |
| Gaston Holding Limited | Wholesale & retail | 2019 |
| Gatland Construction Limited | Construction | 2018 |
| Gatland Holdings Limited | Professional & scientific | 2018 |
| Gattonside Ltd | Administrative & support | 2022 |
| Gayatri Ventures Ltd | Real estate | 2022 |
| GB FAB. Limited | Manufacturing | 2018 |
| GB Property Investment Fund Limited | Administrative & support | 2001 |
| GBS Aviation Limited | Transport & logistics | 2024 |
| GC Events Catering Ltd | Hospitality | 2021 |
| GC Minerals Limited | Wholesale & retail | 2026 |
| GD Tech UK Limited | Wholesale & retail | 2005 |
| GDA Travel Ltd | Administrative & support | 2025 |
| Gdc-Uk Limited | Professional & scientific | 2025 |
| GDL Displays Ltd. | Manufacturing | 2011 |
| GDW TM Ltd | Construction | 2020 |
| Gears Hub Limited | Wholesale & retail | 2025 |
| Geco Fire Systems Limited | Administrative & support | 2017 |
| Geek GOD Merchandise Ltd | Wholesale & retail | 2024 |
| GEM Order Limited | Manufacturing | 1993 |
| Gemini Asset Management Ltd | Administrative & support | 2014 |
| Gemini Legal Services Limited | Professional & scientific | 2010 |
| Gemini Telecom Solution Ltd | Construction | 2024 |
| Gemini Wealth Group Limited | Financial services | 2022 |
| Gemini Wealth Management Ltd | Financial services | 2006 |
| Gemstone Kitchens Ltd | Manufacturing | 2025 |
| Genesis Payroll Services Ltd | Professional & scientific | 2020 |
| Genie Cleaning Consumables Limited | Wholesale & retail | 2022 |
| Genie Cleaning Services Limited | Administrative & support | 2004 |
| Genie Consulting Ltd | Professional & scientific | 2026 |
| Gennea Limited | Other services | 2016 |
| Geoffrey Paul John Ingram Ltd | Extraterritorial | 2024 |
| Geomodes Consulting Ltd | Professional & scientific | 2019 |
| George and Helen Takeaway Ltd | Hospitality | 2023 |
| George and Rafael Ltd | Wholesale & retail | 2026 |
| George Griffiths Holdings Limited | Professional & scientific | 2009 |
| George Hall & SON Funeral Directors Limited | Extraterritorial | 2007 |
| George II Fish Shop Limited | Hospitality | 2010 |
| George Smalling & Associates Limited | Education | 2002 |
| George Stanton (1935) Limited | Extraterritorial | 1935 |
| George Webb Consulting Limited | Professional & scientific | 2009 |
| Georgejoy Ltd | Health & social care | 2023 |
| Georgian Table Ltd | Hospitality | 2025 |
| Georgio's Plaice Limited | Hospitality | 2013 |
| Georgio's VEG Prep Limited | Wholesale & retail | 2013 |
| Georgiou Group Limited | Wholesale & retail | 2021 |
| GES Joinery Ltd | Construction | 2024 |
| GET Back Active Ltd | Other services | 2021 |
| GET IT Together Properties Ltd | Real estate | 2005 |
| Getar Limited | Wholesale & retail | 2023 |
| Getmedco UK Ltd | Health & social care | 2025 |
| GG IT Consulting Ltd | Information & communication | 2022 |
| GG531 Limited | Financial services | 2022 |
| GH Car Sales Ltd | Wholesale & retail | 2019 |
| Ghazal Estate Limited | Real estate | 2020 |