| Fuge Productions Ltd | Arts & recreation | 2026 |
| Full Force Tours Limited | Arts & recreation | 2016 |
| Full Frequency Limited | Arts & recreation | 2005 |
| Fundraising Fourpawspaniels and Friends CIC | Administrative & support | 2021 |
| Funkasm Films Limited | Arts & recreation | 2023 |
| Funkyviva Partnership Limited | Arts & recreation | 2006 |
| Funsani Health Care Services Ltd | Professional & scientific | 2014 |
| Fusion Energy Partners Limited | Professional & scientific | 2024 |
| Future Labs Project Limited | Professional & scientific | 2026 |
| Future Wireless Investment Limited | Real estate | 2020 |
| Future Wireless Limited | Professional & scientific | 2016 |
| Fuzzy Dog Pictures Ltd | Information & communication | 2019 |
| Fyfield (WJO) Limited | Extraterritorial | 1977 |
| Fyfield Design Limited | Professional & scientific | 2023 |
| G & M Comms Ltd | Information & communication | 1996 |
| G J Luke Services Ltd | Construction | 2018 |
| G Raman Ltd | Manufacturing | 2018 |
| G.S.O Taxi's Abingdon Ltd | Transport & logistics | 2026 |
| Gabriel General Services Ltd | Transport & logistics | 2016 |
| Gacek Contractors Ltd | Transport & logistics | 2017 |
| Gainlabs Ltd | Wholesale & retail | 2025 |
| Galaxytechno Ltd | Information & communication | 2012 |
| Gale Estates (APL) Ltd | Agriculture & fishing | 2013 |
| Gale Estates (Oxfordshire) Ltd | Agriculture & fishing | 2017 |
| Galley Field Private Residents Management Company Limited | Households | 2013 |
| Gamidor Technical Services Limited | Manufacturing | 1996 |
| Garden Games Limited | Manufacturing | 1993 |
| Gardin Ltd | Agriculture & fishing | 2020 |
| Gardiner & Gregory Ltd | Construction | 2023 |
| Gardner Garages Limited | Wholesale & retail | 2006 |
| Gardner Garages Properties Limited | Professional & scientific | 2013 |
| Gardner Properties (Trowbridge) Ltd | Real estate | 2021 |
| Gardner Retail Ltd | Wholesale & retail | 2019 |
| Gargantua Productions Limited | Arts & recreation | 2018 |
| Garland Court Management Company Limited | Households | 1975 |
| Garland Crest Online Limited | Wholesale & retail | 2014 |
| Garpa Management Limited | Extraterritorial | 2011 |
| Gary Newman Ltd | Construction | 2026 |
| Gatc Properties Limited | Real estate | 2025 |
| Gateway Educational Services (UK) Limited | Real estate | 2005 |
| Gathered Platform Ltd | Information & communication | 2025 |
| Gave Solution Ltd | Professional & scientific | 2019 |
| Gavin Sheehan Properties Ltd | Real estate | 2026 |
| Gavin Sheehan Racing Ltd | Arts & recreation | 2014 |
| GB Partitioning Limited | Construction | 2014 |
| GCM Global Limited | Professional & scientific | 2014 |
| GCN Web Services Ltd | Wholesale & retail | 2024 |
| GCW Electrical Services Limited | Manufacturing | 2015 |
| GEC Electrical Contractors Limited | Construction | 2008 |
| Genefirst Limited | Professional & scientific | 2011 |
| Geniuses Store UK Ltd | Wholesale & retail | 2023 |
| Gents CUT Oxford Ltd | Other services | 2022 |
| George & Co. Estates Ltd | Real estate | 2025 |
| George Paton Ltd | Real estate | 2024 |
| Georgios Solidakis Ltd | Arts & recreation | 2023 |
| GET Your Bearings Ltd | Wholesale & retail | 2012 |
| GFP Trading Limited | Energy | 2015 |
| GH Travel Ltd | Administrative & support | 2015 |
| Gideon Franklin Limited | Financial services | 2006 |
| Gigaclear Limited | Information & communication | 2010 |
| Gigaclear Midco Limited | Information & communication | 2023 |
| Gigaclear Topco Limited | Information & communication | 2023 |
| Gigidygigs Ltd | Arts & recreation | 2025 |
| Gill & Co (Ironmongers) Limited | Wholesale & retail | 2000 |
| Gilt & Grain Ltd | Wholesale & retail | 2021 |
| Ginge Brook Limited | Agriculture & fishing | 2020 |
| Ginger Raven Limited | Wholesale & retail | 2015 |
| GIR Records Ltd | Information & communication | 2021 |
| Giraffe Events Limited | Professional & scientific | 2006 |
| Giresun 28 Limited | Hospitality | 2019 |
| Girls I Rate Limited | Other services | 2016 |
| GJB Consultancy Oxford Limited | Professional & scientific | 2019 |
| GJS Partners Ltd | Construction | 2024 |
| Gjswilliams Limited | Financial services | 2019 |
| Gknwallshelf Ltd | Wholesale & retail | 2026 |
| GKP Building Supplies Ltd | Wholesale & retail | 2021 |
| GKP Grab Hire Limited | Water & waste | 2018 |
| Glacier Estates (Marchmont) Limited | Construction | 2010 |
| Glanville Projects Holdings Limited | Professional & scientific | 2014 |
| Glanville Projects Limited | Professional & scientific | 1987 |
| Glenmore Business Centre (Witney) Limited | Households | 2002 |
| Global GEO Solutions Ltd | Wholesale & retail | 2019 |
| Global Platin Design Limited | Wholesale & retail | 2024 |
| Global Platin Limited | Wholesale & retail | 2023 |
| Globean Limited | Wholesale & retail | 2025 |
| Gloclip Ltd | Wholesale & retail | 2025 |
| Gloucestershire Gritting Limited | Other services | 2013 |
| Glyn Research Limited | Administrative & support | 2016 |
| GMM Locum Limited | Professional & scientific | 2018 |
| GMS Abingdon Limited | Administrative & support | 2007 |
| Gnomejl Ltd | Professional & scientific | 2021 |
| Go Further Consulting Ltd | Professional & scientific | 2019 |
| Go Green Energy & Heating Limited | Construction | 2024 |
| GOD3 Publishing Limited | Arts & recreation | 2024 |
| Gold Food Store Limited | Wholesale & retail | 2024 |
| Golf Tech Systems Ltd | Wholesale & retail | 2011 |
| Gomm Developments Limited | Construction | 2001 |
| Gomp Limited | Wholesale & retail | 2019 |
| Good Guys Delivery Ltd | Transport & logistics | 2026 |
| Good Human Limited | Arts & recreation | 2012 |