| GA Automotive Ltd | Wholesale & retail | 2025 |
| GA Furnace Engineering Ltd | Manufacturing | 2017 |
| GA Robertson Limited | Information & communication | 2020 |
| GA Sound Limited | Information & communication | 2017 |
| GA Trading Limited | Wholesale & retail | 2016 |
| Gaac Consultancy Ltd | Information & communication | 2013 |
| Gaard Coffee Hide Limited | Hospitality | 2018 |
| Gabco Transport Limited | Transport & logistics | 2025 |
| Gables Property Solutions Limited | Construction | 2022 |
| Gables Surveying Limited | Construction | 2004 |
| Gabos Industrial Limited | Wholesale & retail | 2026 |
| Gabriel Construction Services Ltd | Construction | 2016 |
| Gabrielle Spanswick Ltd | Arts & recreation | 2019 |
| Gaddon Limited | Administrative & support | 2009 |
| Gadef International UK Ltd | Professional & scientific | 2024 |
| Gaden House Ltd | Real estate | 2019 |
| Gadf Holdings Limited | Professional & scientific | 2008 |
| Gadget Expert Limited | Wholesale & retail | 2016 |
| Gadget Tech Limited | Wholesale & retail | 2012 |
| Gadgets Repair Center Limited | Other services | 2024 |
| Gadgetstop Ltd | Wholesale & retail | 2024 |
| Gadoll Consulting Services Limited | Information & communication | 2026 |
| Gadoll Limited | Information & communication | 2019 |
| Gaff Hospitality Consulting Ltd | Professional & scientific | 2025 |
| Gage Sporting Services Ltd | Professional & scientific | 2025 |
| Gags for Good CIC | Education | 2025 |
| Gahl Holdings Limited | Construction | 2018 |
| Gaia Innovation Limited | Professional & scientific | 2015 |
| Gail Oxley Limited | Professional & scientific | 2015 |
| Gaildrew Trading Ltd | Hospitality | 2017 |
| Gain and Phase Ltd | Professional & scientific | 2026 |
| Gainsborough Health Care Limited | Health & social care | 2006 |
| Gainspace Solutions Ltd | Extraterritorial | 2013 |
| Gaishi Heroes Limited | Hospitality | 2024 |
| GAJ Consultancy Limited | Professional & scientific | 2025 |
| Galactic Group Ltd | Wholesale & retail | 2025 |
| Galahad Enterprises Limited | Real estate | 2019 |
| Galahad Promotions Limited | Arts & recreation | 2022 |
| Galanthus Lacfree Limited | Administrative & support | 2026 |
| Galasphere Limited | Wholesale & retail | 2025 |
| Galaxy Access Ltd | Construction | 2021 |
| Galaxy Construction Products Ltd | Financial services | 2016 |
| Galaxy Construction Solutions Ltd | Professional & scientific | 2018 |
| Galaxy Insulation and DRY Lining Limited | Wholesale & retail | 2009 |
| Galaxy Trustees Limited | Professional & scientific | 2022 |
| Galaxypod House Limited | Wholesale & retail | 2025 |
| Galayd Bashe Ltd | Transport & logistics | 2026 |
| Galbraith Property Ltd | Real estate | 2018 |
| Galebest Contracting Limited | Construction | 2012 |
| Galebest Limited | Administrative & support | 1985 |
| Galemain (Engineering Services) Limited | Manufacturing | 1983 |
| Gallaghers Building Contractors Ltd | Administrative & support | 2021 |
| Gallaghers of Sheffield Limited | Hospitality | 2019 |
| Galleys Holdings Ltd | Real estate | 2023 |
| Gallfield Limited | Financial services | 2021 |
| Gallop Couriers Ltd | Transport & logistics | 2024 |
| Galloway Tree Services Limited | Administrative & support | 2002 |
| Galloway's Cleaning Services Limited | Administrative & support | 2004 |
| Gallows Pole Ltd | Financial services | 2021 |
| Galtees Care Limited | Health & social care | 2025 |
| Galvanizeuk Limited | Manufacturing | 2018 |
| Galvuk Prop Co Limited | Real estate | 2025 |
| Galvyn Training & HR Consultancy Limited | Professional & scientific | 2005 |
| Game & Movie Ltd | Wholesale & retail | 2024 |
| Game Changer Sports Ltd | Education | 2024 |
| Game Futures Ltd | Professional & scientific | 2017 |
| Game Show All-Stars Ltd | Arts & recreation | 2023 |
| Gamers Forge Ltd | Wholesale & retail | 2025 |
| Gamesdrop Ltd | Information & communication | 2009 |
| Gameshow All-Stars Leeds Ltd | Arts & recreation | 2025 |
| Gameshow All-Stars Nottingham Ltd | Arts & recreation | 2026 |
| Gamoom Limited | Wholesale & retail | 2026 |
| Gams Networks Limited | Wholesale & retail | 2023 |
| Gana Club Limited | Wholesale & retail | 2025 |
| Gandalf’S Beacon Limited | Information & communication | 2025 |
| Gandhahome Limited | Wholesale & retail | 2025 |
| Ganumbra.Com Ltd | Information & communication | 2016 |
| Gao's Ceramics Ltd | Wholesale & retail | 2025 |
| Gaom Ltd | Wholesale & retail | 2025 |
| Garbell Aviation Ltd | Transport & logistics | 2021 |
| Garcha Cardiac Specialist Limited | Health & social care | 2024 |
| Garcom Limited | Information & communication | 2005 |
| Garden Hues Ltd | Administrative & support | 2025 |
| Garden Partners Stocksbridge Community Interest Company | Education | 2011 |
| Gardenstyle Limited | Other services | 2000 |
| Gardner Capital Limited | Real estate | 2021 |
| Garfitts (International) Limited | Manufacturing | 1991 |
| Garibaldi (1865) Consultancies Ltd | Professional & scientific | 2014 |
| Garifuna Enterprises Ltd | Wholesale & retail | 2025 |
| Garinger Middle East for Trading (Gmet Global) Ltd | Wholesale & retail | 2025 |
| Garland Rentals Ltd | Real estate | 2024 |
| Garmentec Group Ltd | Wholesale & retail | 2014 |
| Garo Properties Limited | Households | 2026 |
| Garrandale Engineering Limited | Professional & scientific | 2020 |
| Garrington Chase Limited | Professional & scientific | 2017 |
| Garrison Investment Group Ltd | Construction | 2021 |
| Garside Surgery Limited | Health & social care | 2010 |
| Gartenland UK Ltd. | Wholesale & retail | 2021 |
| Gary Boon Ltd | Manufacturing | 2017 |
| Gary Bradbury Builder Ltd | Construction | 2026 |