| Escape to Oxford Limited | Administrative & support | 2021 |
| Escritoire Limited | Other services | 2012 |
| Etcembly Ltd | Professional & scientific | 2019 |
| Euro Marine Services Limited | Arts & recreation | 1986 |
| Euro Sports Limited | Wholesale & retail | 2007 |
| EVE Johnson Houghton Racing Limited | Arts & recreation | 2025 |
| Everstead Performance Ltd | Arts & recreation | 2026 |
| Everyman Advisory Limited | Professional & scientific | 2019 |
| Evolve Enabling Contractor Limited | Construction | 2024 |
| Exciting Enterprises Limited | Hospitality | 2004 |
| Executive Extinguishers Ltd | Real estate | 2003 |
| Executive Security Locksmiths Limited | Construction | 1998 |
| Experience Oxfordshire Charitable Trust | Arts & recreation | 2002 |
| F G Alden Limited | Manufacturing | 1937 |
| F. & J. Hambidge (Farms) Limited | Agriculture & fishing | 1972 |
| Fcms Accountancy Services Ltd | Professional & scientific | 2007 |
| Feha Limited | Professional & scientific | 2000 |
| Fergal Contracting Co.Limited | Construction | 1968 |
| Fiennes Court Management Company Limited | Real estate | 2003 |
| Fincham Haulage Ltd | Transport & logistics | 2014 |
| Fine Lady Management Company Limited | Real estate | 2003 |
| Fingers and Forks Limited | Hospitality | 2007 |
| Finsco Property Company Limited | Real estate | 2006 |
| Fitronics Limited | Information & communication | 2002 |
| Flex Technology Limited | Information & communication | 1990 |
| Fluid & Purpose Ltd | Other services | 2020 |
| Fluidity Limited | Wholesale & retail | 1997 |
| Fortfield Capital LLP | | 2022 |
| Frame by Frame Construction Limited | Information & communication | 2001 |
| Francis Fields LLP | | 2004 |
| Francis Trading Holdings Limited | Professional & scientific | 1997 |
| Freeland Fencing Limited | Administrative & support | 2018 |
| Freeland Group Limited | Extraterritorial | 2019 |
| Freewoods Limited | Financial services | 2006 |
| Freshname NO. 389 Limited | Financial services | 2008 |
| Freshwater Consulting Services Limited | Professional & scientific | 2006 |
| Frilford Heath Golf Club Limited(The) | Arts & recreation | 1912 |
| FSD Ltd | Real estate | 2000 |
| Fullflight Limited | Information & communication | 1999 |
| Fullmer Development Co., Limited | Construction | 1962 |
| Fundraising Training Limited | Administrative & support | 2001 |
| Funnel Archetypes Ltd | Administrative & support | 2023 |
| G & a (Oxford) Services Ltd | Information & communication | 2023 |
| G & S Woodcock Limited | Construction | 2004 |
| G&D's Oxford Limited | Hospitality | 2000 |
| G. R. Marketing Limited | Professional & scientific | 2024 |
| G.B.F. Designs Ltd. | Professional & scientific | 1997 |
| G.D. Investments (UK) Limited | Construction | 1998 |
| G.J.Brown & Sons | | 1992 |
| Galliance UK Limited | Wholesale & retail | 1991 |
| Gardiner Legge Property Limited | Professional & scientific | 2019 |
| Gbcc Limited | Information & communication | 2005 |
| GCW Accountancy Limited | Professional & scientific | 2003 |
| Geoff Bird Design Limited | Professional & scientific | 2007 |
| GEOSTEF25 Logistics Limited | Transport & logistics | 2018 |
| Ghulam Ahmed Corporation Limited | Hospitality | 2024 |
| Giovanni's Barber Shop Limited | Other services | 2002 |
| Giraffe Corner Limited | Education | 2006 |
| Gladstone MRM Limited | Information & communication | 1981 |
| Gleamteam Valeting (Oxford) Limited | Administrative & support | 2003 |
| Globe Consulting Services Limited | Real estate | 1998 |
| GMG | | 1998 |
| Gold Zone GB Limited | Manufacturing | 2003 |
| Golding CE Limited | Real estate | 2001 |
| Goodison CRM Limited | Information & communication | 2015 |
| Goodlife Gardens Limited | Professional & scientific | 2006 |
| Grafton Lodge (Banbury) Management Company Limited | Real estate | 1988 |
| Grass Harp Ltd | Real estate | 2025 |
| Great Western Society Limited | Arts & recreation | 1967 |
| Green Dog Management Limited | Construction | 2017 |
| Green Hills Software Ltd. | Information & communication | 1998 |
| Green Key (UK) Limited | Education | 2013 |
| Greigcare Limited | Health & social care | 2002 |
| GT Carpentry Limited | Construction | 2003 |
| Habitat Land Limited | Construction | 2020 |
| Haddenham Motorist Centre Limited | Wholesale & retail | 2004 |
| Hadland Manning Bullock & Partners Ltd | Professional & scientific | 2002 |
| Hadron Capital LLP | | 2004 |
| Hadron Capital UK Limited | Financial services | 2014 |
| Hambridge Electricals Ltd | Construction | 2018 |
| Hamnett Hayward (Thame) Limited | Real estate | 2002 |
| Hampden Mews Management Company Limited | Households | 1994 |
| Harri - Stone Masonry Limited | Construction | 2006 |
| Havenstar MMS Limited | Information & communication | 2014 |
| Havenstar Software Solutions Limited | Information & communication | 2013 |
| Hawkins Group of Companies Limited | Construction | 2001 |
| Hawkins Steel Limited | Manufacturing | 2005 |
| HDS Electrical Ltd | Construction | 2013 |
| HDS Solar and Electrical Ltd | Construction | 2022 |
| Heathcote Consultants Ltd | Professional & scientific | 1996 |
| Helicare Limited | Manufacturing | 2007 |
| Helm Associates Limited | Administrative & support | 1987 |
| Henley Clinic Limited | Administrative & support | 2002 |
| Henley Hockey Club | Arts & recreation | 2003 |
| Henley Royal Regatta | Arts & recreation | 2017 |
| Henley Ymca | Hospitality | 2001 |
| Higgs & Co. (Printers) Limited | Manufacturing | 1979 |
| High Street Burford PUB Limited | Hospitality | 2020 |
| Hill House Management Limited | Households | 1988 |
| Hithercroft Court Management Company Limited | Real estate | 1990 |