| Genese Property Group Limited | Construction | 2005 |
| Genese Property Maintenance Limited | Extraterritorial | 2012 |
| Genesis Cognition Ltd | Information & communication | 2025 |
| Genius Solutions Limited | Education | 1996 |
| George Henry Relay (Oxford) Limited | Information & communication | 2015 |
| George Henry Relay Limited | Professional & scientific | 1960 |
| Georgiana Care Ltd | Health & social care | 2019 |
| Geraint Lewis Photography and Design Limited | Professional & scientific | 2010 |
| Germination Mentoring & Advisory Ltd | Professional & scientific | 2024 |
| GET Data Protection Services Limited | Information & communication | 2023 |
| GET Radio Limited | Extraterritorial | 2021 |
| GET Support IT Services Limited | Information & communication | 2009 |
| GET Support Limited | Extraterritorial | 2018 |
| Getenergy Limited | Professional & scientific | 2014 |
| Getenergy Projects Ltd | Professional & scientific | 2019 |
| GG & C Holdings Ltd | Professional & scientific | 2026 |
| GGN Intl Ltd | Wholesale & retail | 2018 |
| GGN Properties Ltd | Real estate | 2025 |
| Gifford’S Electrical Ltd | Construction | 2019 |
| Gigley Farm Ltd | Agriculture & fishing | 2018 |
| Gigley Ltd | Agriculture & fishing | 2018 |
| Ginger Biscuit Ltd | Professional & scientific | 2023 |
| Giraffe Decorators Ltd | Construction | 2024 |
| GL GAS Ltd | Construction | 2020 |
| GL50 Properties Limited | Construction | 1997 |
| Glazebrook Associates Limited | Professional & scientific | 2002 |
| Glebe House Management Company (Northleach) Limited | Households | 2007 |
| Glebe Mews (Management Company) Limited | Households | 2023 |
| Gleeson Medical Services Limited | Health & social care | 2014 |
| Gliagenesis Limited | Professional & scientific | 2017 |
| Glint Media Ltd | Information & communication | 2018 |
| Glitch Games Ltd | Information & communication | 2012 |
| Global 360 Logistics Ltd | Transport & logistics | 2019 |
| Global IP Consulting Limited | Professional & scientific | 2012 |
| Global Litigation Limited | Financial services | 2016 |
| Global POP Procurement Ltd | Wholesale & retail | 2017 |
| Global Property Spectrum Ltd | Real estate | 2026 |
| Global Software Systems (UK) Limited | Information & communication | 2001 |
| Globali Online Ltd | Wholesale & retail | 2021 |
| Globe Real Estate Ltd | Hospitality | 2025 |
| Globetrotter Creative Limited | Professional & scientific | 2024 |
| Glotrav Limited | Information & communication | 2017 |
| Gloucester Court Management (Witney) Limited | Households | 1987 |
| Glowworm Marketing Limited | Professional & scientific | 2003 |
| Glyme Valley Productions Limited | Administrative & support | 2018 |
| Glymestone Limited | Professional & scientific | 2024 |
| Gnetwork Services Ltd | Information & communication | 2013 |
| Go Configure Limited | Professional & scientific | 2019 |
| Godson Projects Ltd | Professional & scientific | 1998 |
| Gogabuhin Limited | Health & social care | 2014 |
| Gokind Co Ltd | Wholesale & retail | 2023 |
| Gold Entertainment Ltd | Information & communication | 2016 |
| Golden Atara Ltd | Health & social care | 2022 |
| Golden Stitch Witney Ltd | Professional & scientific | 2025 |
| Goldfield-Stenson Limited | Professional & scientific | 2023 |
| Goldfinch Property Homes CIC | Real estate | 2025 |
| Goldfire Properties Limited | Other services | 2017 |
| Goldsmith House (Irving Mews) Limited | Households | 1998 |
| Goldthorpe Ltd | Real estate | 2022 |
| Gomaco International Limited | Construction | 1983 |
| Good Fortune Prosperity Peak UK Ltd. | Other services | 2021 |
| Good Life Limited | Wholesale & retail | 2026 |
| Goodbase Digital Ltd | Information & communication | 2020 |
| Goodsystem Group Ltd | Construction | 2026 |
| Goofy Shark Productions Limited | Arts & recreation | 2025 |
| Goosen Limited | Health & social care | 2025 |
| Gordon Forward Limited | Professional & scientific | 2025 |
| Goring Berry LLP | | 2006 |
| Gorselands Hall B and B Limited | Hospitality | 2017 |
| Gosford Hill Court Management Company Limited | Households | 2008 |
| Goshawk (Real Estate) Limited | Real estate | 2013 |
| Goshen Light Creations Ltd | Wholesale & retail | 2024 |
| Gosling Court (Abingdon) Management Company Limited | Households | 2004 |
| GP Residential Limited | Real estate | 2013 |
| Graceforte Support Services Ltd | Extraterritorial | 2024 |
| Graciouwana Care Ltd | Health & social care | 2019 |
| Grafeye Limited | Manufacturing | 2017 |
| Graham Smith Business Services Limited | Professional & scientific | 2004 |
| Gralyne Services Limited | Professional & scientific | 2016 |
| Granchor Ltd | Manufacturing | 2022 |
| Grant Wallis Groundworks Limited | Construction | 2002 |
| Grapes and Tomatoes Trading Company Ltd | Hospitality | 2018 |
| Graphic Advertising Limited | | 1983 |
| Graphite Analysis Limited | Information & communication | 2025 |
| Graykat Limited | Professional & scientific | 2011 |
| Great Experience Travel Limited | Administrative & support | 2007 |
| Green Axis Limited | Professional & scientific | 2015 |
| Green Escape Ltd | Administrative & support | 2007 |
| Green Gatsby's Ltd | Wholesale & retail | 2020 |
| Green Monkey PUB Co LLP | | 2021 |
| Green Oak Investments Limited | Administrative & support | 2020 |
| Green Quality Services Limited | Professional & scientific | 2015 |
| Green Rooms Entertainment Limited | Arts & recreation | 2025 |
| Green Springboard Ltd | Wholesale & retail | 2020 |
| Greena Developments Ltd | Construction | 2021 |
| Greendymond Construction Limited | Construction | 2012 |
| Greener Ohms Ltd | Construction | 2022 |
| Greener Taxis Ltd | Transport & logistics | 2014 |
| Greenfox Controls Ltd | Professional & scientific | 2026 |
| Greengage Business Solutions Ltd | Professional & scientific | 2020 |