| Global Survey Specialist Ltd | Information & communication | 2022 |
| Global Window Systems Limited | Construction | 2023 |
| Globalization Partners Ltd. | Professional & scientific | 2013 |
| Gloomies Ltd | Wholesale & retail | 2025 |
| Glory BEE UK Ltd | Wholesale & retail | 2021 |
| Gluche Lodge Ltd | Wholesale & retail | 2017 |
| GM Business Solutions Ltd | Construction | 2007 |
| GN Hearing UK Ltd | Wholesale & retail | 1994 |
| Go 2 Beverages Ltd | Manufacturing | 2024 |
| Go to People Limited | Professional & scientific | 2013 |
| GO2TAN Ltd | Other services | 2022 |
| Godington Residential Limited | Real estate | 2017 |
| Gold Tanning Studio Ltd | Other services | 2023 |
| Golden Red Asian Store Ltd | Wholesale & retail | 2024 |
| Goldstar Care Limited | Health & social care | 2016 |
| Golf Albania LLP | | 2020 |
| Good Honest Change Ltd. | Professional & scientific | 2018 |
| Good Wine Limited | Information & communication | 2023 |
| Goodhead Converters Limited | Manufacturing | 1985 |
| Goose Cannon Ltd | Professional & scientific | 2023 |
| Gordon AL Ltd | Professional & scientific | 2018 |
| Goshawk Newco 1 Limited | Financial services | 2023 |
| Goshen Private Limited | Real estate | 2025 |
| GPD Plumbing and Heating Ltd | Construction | 2026 |
| GPF Automation & Services Ltd | Manufacturing | 2009 |
| Gpuk Health Limited | Health & social care | 2026 |
| GPW Training and Security Consultants Ltd | Other services | 2024 |
| Gr&Ro Property Ltd | Real estate | 2025 |
| Graham Caulfield Ltd | Manufacturing | 2013 |
| Grand Illusions Limited | Wholesale & retail | 1996 |
| Grange Farm (Godington) Ltd | Agriculture & fishing | 2014 |
| Grange Farm Cottages Limited | Administrative & support | 2016 |
| Granite Star Aerial Ltd | Professional & scientific | 2021 |
| Granite Star Consultancy Limited | Financial services | 2019 |
| Grant Construction (Oxfordshire) Ltd | Construction | 2021 |
| Grants International Information & Security Services Limited | Professional & scientific | 1989 |
| Grassroots Training and Recruitment Limited | Administrative & support | 2012 |
| Graven Hill Management Company Block H Limited | Households | 2025 |
| Graven Hill Village Development Company Limited | Administrative & support | 2014 |
| Graven Hill Village Holdings Limited | Administrative & support | 2014 |
| Graven Hill Village Lease Company Limited | Real estate | 2021 |
| Graven Hill Village Management Block C Limited | Households | 2021 |
| Graven Hill Village Management Company 431 Limited | Households | 2026 |
| Graven Hill Village Management Company 438 Limited | Households | 2026 |
| Graven Hill Village Management Company Block a Limited | Households | 2018 |
| Graven Hill Village Management Company Block E Limited | Households | 2018 |
| Graven Hill Village Management Company Block F Limited | Households | 2022 |
| Graven Hill Village Management Company Limited | Households | 2018 |
| Gravitas Land & Development Ltd | Financial services | 2026 |
| Grayling Thomas Architects Limited | Professional & scientific | 2010 |
| Grayswood Construction Group Ltd | Construction | 2022 |
| Great British Investments Ltd | Extraterritorial | 2015 |
| Great Furniture Solutions Ltd | Construction | 2022 |
| Greclo Limited | Real estate | 2012 |
| Green and Gray Audio LLP | | 2020 |
| Green Data Solutions Limited | Extraterritorial | 2008 |
| Green Farm Shop Limited | Wholesale & retail | 2026 |
| Green Meadow Holdings Ltd | Real estate | 2016 |
| Green Mint Limited | Wholesale & retail | 2019 |
| Green Paws Limited | Agriculture & fishing | 2010 |
| Green Roost Limited | Real estate | 2023 |
| Green Stripes Lawn Services Ltd | Administrative & support | 2026 |
| Greencore (Milton) Ltd | Real estate | 2024 |
| Greencore (Shipton) Ltd | Real estate | 2024 |
| Greencore (Waddesdon) Ltd | Real estate | 2024 |
| Greencore Homes (Haddenham) Ltd | Construction | 2020 |
| Greencore Homes (Puckeridge) Ltd | Real estate | 2025 |
| Greencore Homes (SPV NO1) Ltd | Real estate | 2025 |
| Greencore Homes (SPV NO2) Ltd | Real estate | 2025 |
| Greencore Homes Ltd | Construction | 2013 |
| Greener Logic Ltd | Professional & scientific | 2011 |
| Greenfield (Midlands) Limited | Real estate | 2004 |
| Greenstone Partners Ltd | Wholesale & retail | 2024 |
| Greenwood Software Company Ltd. | Professional & scientific | 2016 |
| Green’S Global Rail Training Services Ltd | Transport & logistics | 2023 |
| Gregg Lancaster Design Ltd | Professional & scientific | 2025 |
| Grey Method Ltd | Information & communication | 2014 |
| Greyhound LSR Limited | Other services | 2025 |
| Greytown Dental Practice Limited | Health & social care | 2009 |
| Gridsupport Limited | Construction | 2015 |
| Grimsdale Law Limited | Professional & scientific | 2003 |
| Grinolic Limited | Professional & scientific | 2018 |
| Grip Tyre Bicester Limited | Wholesale & retail | 2020 |
| Grooming Marvellous Limited | Other services | 2012 |
| Groovyglutes Ltd | Administrative & support | 2018 |
| Ground Coffee Roasters Limited | Manufacturing | 2014 |
| Group C/Gtp Racing Ltd | Other services | 2003 |
| Group Genie Limited | Financial services | 2017 |
| Growth Compass Limited | Professional & scientific | 2014 |
| GS985 Ltd | Transport & logistics | 2025 |
| Gsat Real Estate Ltd | Real estate | 2020 |
| GTS Bicester Limited | Information & communication | 2020 |
| Guardian House Offices Ltd | Real estate | 2022 |
| Guardian Knight Ltd | Financial services | 2021 |
| Gujjushop Ltd | Wholesale & retail | 2024 |
| Gula Consultancy Limited | Health & social care | 2024 |
| Gurkha DEN Oxford Limited | Hospitality | 2026 |
| Gutter Maintenance (Oxford) Limited | Construction | 1978 |
| Guttersoul Limited | Professional & scientific | 2022 |
| GUY Rowles Composites Limited | Manufacturing | 2025 |