| Oxford Global Career Academy Limited | Education | 2025 |
| Oxford Global Culture Limited | Education | 2024 |
| Oxford Global Elite College Limited | Education | 2018 |
| Oxford Global English Language School Ltd | Education | 2025 |
| Oxford Global Medical Consulting Ltd | Professional & scientific | 2026 |
| Oxford Global Projects UK Limited | Professional & scientific | 2022 |
| Oxford Golf Club Limited | Arts & recreation | 1922 |
| Oxford Golf Club Visitors Limited | Arts & recreation | 2016 |
| Oxford Good Cleaning Ltd | Administrative & support | 2018 |
| Oxford Graduate College Ltd | Education | 2019 |
| Oxford Grappling Limited | Education | 2026 |
| Oxford Greek Taverna Ltd | Hospitality | 2018 |
| Oxford Green Education Limited | Education | 2026 |
| Oxford Green Innotech Limited | Professional & scientific | 2021 |
| Oxford Greenprint Limited | Information & communication | 1997 |
| Oxford Gummy LAB Ltd | Wholesale & retail | 2025 |
| Oxford Gynae Clinic Ltd | Health & social care | 2023 |
| Oxford Hair Loss Clinic Ltd | Other services | 2023 |
| Oxford Hairdressing Supplies Limited | Wholesale & retail | 2001 |
| Oxford Hand and Reconstructive Surgery Ltd | Health & social care | 2019 |
| Oxford Hand Surgery Ltd | Health & social care | 2016 |
| Oxford Hand Therapy Ltd | Health & social care | 2025 |
| Oxford Harlequins Rugby Football Club Limited | Arts & recreation | 2013 |
| Oxford Harlequins Trading Limited | Arts & recreation | 2015 |
| Oxford Hazard Management Limited | Professional & scientific | 2012 |
| Oxford Headington Holdings LLP | | 2020 |
| Oxford Health & Fitness Academy Ltd | Arts & recreation | 2011 |
| Oxford Health Policy Forum CIC | Professional & scientific | 2016 |
| Oxford Health Promotion and Education Initiative CIC | Professional & scientific | 2019 |
| Oxford Health Research Ltd. | Health & social care | 2014 |
| Oxford Health Solutions Ltd | Administrative & support | 2015 |
| Oxford Healthspan Ltd | Wholesale & retail | 2019 |
| Oxford Heart Surgery Ltd | Health & social care | 2016 |
| Oxford Heat Transfer Limited | Professional & scientific | 2017 |
| Oxford Heritage Limited | Wholesale & retail | 1996 |
| Oxford Heritage Property Management Ltd | Real estate | 2021 |
| Oxford Heritage Tours Ltd | Administrative & support | 2025 |
| Oxford Holdings Ltd | Real estate | 2024 |
| Oxford Holiday Nests Ltd | Hospitality | 2024 |
| Oxford Home Renovation Ltd | Construction | 2023 |
| Oxford Horizon Academy Ltd | Education | 2026 |
| Oxford Hormone Clinic Ltd | Health & social care | 2020 |
| Oxford Hospitality Services(Uk) Ltd | Administrative & support | 2013 |
| Oxford Hospitals Charity | Health & social care | 2017 |
| Oxford House Builders Ltd | Construction | 2025 |
| Oxford Hypernautics Ltd | Information & communication | 2024 |
| Oxford Ice Hockey Limited | Arts & recreation | 2025 |
| Oxford Igbo Union CIC | Other services | 2025 |
| Oxford Imhotep Limited | Information & communication | 2017 |
| Oxford Immaculate Cleaning Ltd | Administrative & support | 2018 |
| Oxford Imperial Fleet Ltd | Transport & logistics | 2023 |
| Oxford Independent Health Ltd. | Health & social care | 2016 |
| Oxford Indie Book Fair | Administrative & support | 2023 |
| Oxford Informatica Limited | Extraterritorial | 2006 |
| Oxford Information Labs Limited | Information & communication | 2002 |
| Oxford Information Labs Research | Information & communication | 2025 |
| Oxford Information Limited | Information & communication | 1984 |
| Oxford Infosec Ltd | Information & communication | 2022 |
| Oxford Infrastructure Analytics Limited | Professional & scientific | 2017 |
| Oxford Innovation Capital Limited | Extraterritorial | 2016 |
| Oxford Innovation for Science and Technology Limited | Professional & scientific | 2017 |
| Oxford Innovation Limited | Real estate | 1987 |
| Oxford Innovation Services Limited | Administrative & support | 2011 |
| Oxford Input Ltd | Professional & scientific | 2013 |
| Oxford Institute for Energy Studies | Professional & scientific | 1982 |
| Oxford Intellect Ltd | Education | 2015 |
| Oxford International Academy Ltd | Other services | 2017 |
| Oxford International AQA Examinations Limited | Education | 2015 |
| Oxford International Limited | Professional & scientific | 1999 |
| Oxford International School of Taekwondo Ltd | Education | 2018 |
| Oxford International Study Abroad Programme Ltd | Education | 2017 |
| Oxford International Study Centre Consulting Ltd | Education | 2025 |
| Oxford International Study Centre Limited | Education | 2006 |
| Oxford Investment Consultants LLP | | 2014 |
| Oxford Investment Ltd | Real estate | 2024 |
| Oxford Investment Opportunity Network Limited | Financial services | 2011 |
| Oxford Ionics Limited | Manufacturing | 2019 |
| Oxford Ironmongery Ltd | Wholesale & retail | 2006 |
| Oxford Islamic Finance Limited | Professional & scientific | 2003 |
| Oxford IT Support Ltd | Other services | 2012 |
| Oxford Joint Analysis Limited | Professional & scientific | 2009 |
| Oxford Jubilee Properties Limited | Real estate | 2025 |
| Oxford Kebab House & Persian Cuisine Limited | Hospitality | 2015 |
| Oxford KIT Hire Ltd | Administrative & support | 2024 |
| Oxford Knee Developments Ltd | Professional & scientific | 2021 |
| Oxford Korea Initiative Ltd | Information & communication | 2025 |
| Oxford Labs Ltd | Information & communication | 2025 |
| Oxford Land Consultants Ltd | Real estate | 2019 |
| Oxford Landscapes Ltd | Administrative & support | 2010 |
| Oxford Language Technologies Ltd | Information & communication | 2023 |
| Oxford Laser Clinic Ltd | Health & social care | 2026 |
| Oxford Lasers Group Limited | Manufacturing | 2006 |
| Oxford Lasers Limited | Manufacturing | 1977 |
| Oxford Lasers Micromachining Limited | Professional & scientific | 1998 |
| Oxford Latinitas Ltd | Education | 2021 |
| Oxford Laundrette Ltd | Other services | 2025 |
| Oxford Law Group Ltd | Professional & scientific | 2019 |
| Oxford Lbright Limited | Real estate | 2017 |
| Oxford Leadership and Management Ltd. | Professional & scientific | 2024 |
| Oxford Leak Detection Limited | Construction | 2015 |