| Oxford Vinted Ltd | Wholesale & retail | 2025 |
| Oxford VIP Chauffeurs Ltd | Transport & logistics | 2019 |
| Oxford Virtual Education Group Ltd | Professional & scientific | 2016 |
| Oxford Virtual Reality Ltd | Information & communication | 2016 |
| Oxford VR Limited | Health & social care | 2016 |
| Oxford Walton Street Lodge Ltd | Other services | 2025 |
| Oxford Water Dispensers Ltd | Administrative & support | 2018 |
| Oxford Waterfront Management Company Limited | Households | 2005 |
| Oxford Waterside Management Company Limited | Households | 1996 |
| Oxford Wave Research Limited | Information & communication | 2011 |
| Oxford Web Builders Ltd | Information & communication | 2024 |
| Oxford Web Services Ltd | Information & communication | 2020 |
| Oxford Webworks Limited | Information & communication | 2010 |
| Oxford Wedding Hair & Makeup Ltd | Other services | 2018 |
| Oxford Wellness Doctor Ltd | Other services | 2021 |
| Oxford Wheels Project | Arts & recreation | 2012 |
| Oxford Wholefoods Ltd | Wholesale & retail | 1990 |
| Oxford Wine Wholesale Ltd | Wholesale & retail | 2025 |
| Oxford Women Community CIC | Public administration | 2026 |
| Oxford Women's Health Limited | Health & social care | 2022 |
| Oxford World Holdings Ltd | Financial services | 2024 |
| Oxford Xpress Ltd | Wholesale & retail | 2023 |
| Oxford Yarn Ltd | Wholesale & retail | 2021 |
| Oxford Yoga Pilates Limited | Arts & recreation | 2014 |
| Oxford Youth and Family Practice Limited | Administrative & support | 2014 |
| Oxford Youth Enterprise Limited | Other services | 1981 |
| Oxford's British Orchard Nursery Limited | Health & social care | 2018 |
| Oxford-Cambridge Centre for Advanced Management Experience Ltd | Professional & scientific | 2013 |
| Oxford-Ndm Overseas Limited | Extraterritorial | 2022 |
| OXFORD4U Ltd | Information & communication | 2024 |
| OXFORD5IN1 Ltd | Transport & logistics | 2024 |
| Oxfordatomic Ltd | Professional & scientific | 2019 |
| Oxfordmaxillofacial Ltd | Health & social care | 2021 |
| Oxfordpizzangrill Limited | Hospitality | 2023 |
| Oxfordpraise Limited | Health & social care | 2019 |
| Oxfords Heavenly Hair Ltd | Other services | 2024 |
| Oxfordscoliosis Limited | Health & social care | 2014 |
| Oxfordshire Association of Care Providers Community Interest Company | Administrative & support | 2014 |
| Oxfordshire Builders Limited | Extraterritorial | 2025 |
| Oxfordshire Business Awards Limited | Administrative & support | 2016 |
| Oxfordshire Care Ltd | Health & social care | 2024 |
| Oxfordshire Cars Limited | Transport & logistics | 2024 |
| Oxfordshire Chauffeurs Ltd | Transport & logistics | 2023 |
| Oxfordshire Community Churches | Education | 1996 |
| Oxfordshire Couriers Inc. Limited | Transport & logistics | 2023 |
| Oxfordshire Crossroads | Health & social care | 2009 |
| Oxfordshire Developments Limited | Real estate | 1986 |
| Oxfordshire Domestic Cleaning Services Ltd | Administrative & support | 2015 |
| Oxfordshire Electrics & Plumbing Ltd | Construction | 2021 |
| Oxfordshire Elite Private Staff Ltd. | Households | 2017 |
| Oxfordshire Funeral Support Services Ltd | Other services | 2019 |
| Oxfordshire Garden Buildings Ltd | Manufacturing | 2024 |
| Oxfordshire Group Homes | Other services | 2005 |
| Oxfordshire Homes Limited | Construction | 2018 |
| Oxfordshire Lettings Ltd | Real estate | 2021 |
| Oxfordshire Liveable Streets | Administrative & support | 2018 |
| Oxfordshire Local Enterprise Partnership Limited | Administrative & support | 2015 |
| Oxfordshire Logs Ltd | Wholesale & retail | 2016 |
| Oxfordshire Mind | Education | 2001 |
| Oxfordshire Motor Project | Education | 1992 |
| Oxfordshire Muslim College Ltd | Education | 2015 |
| Oxfordshire Oral Surgery Ltd | Health & social care | 2025 |
| Oxfordshire PAT Testing Limited | Manufacturing | 2014 |
| Oxfordshire Pest Defence Ltd | Administrative & support | 2024 |
| Oxfordshire Plant Hire Limited | Administrative & support | 2024 |
| Oxfordshire Rental Services Limited | Real estate | 2025 |
| Oxfordshire Rural Services Ltd | Construction | 2020 |
| Oxfordshire Social Care Partnership CIC | Other services | 2019 |
| Oxgen AI Limited | Administrative & support | 2023 |
| Oxgrill Bites Ltd | Hospitality | 2025 |
| Oxhealth Ltd | Financial services | 2020 |
| Oxheat Service Ltd | Construction | 2023 |
| Oxhelix Ltd | Information & communication | 2025 |
| Oxhey Lodge (Harrow) Management Company Limited | Households | 2008 |
| Oxhome Estate Agents Ltd | Real estate | 2018 |
| Oxigenuk Limited | Real estate | 2021 |
| Oximmune Therapeutics Ltd | Professional & scientific | 2026 |
| Oxisis AI Limited | Professional & scientific | 2018 |
| Oxkem Energy Limited | Professional & scientific | 2018 |
| Oxkem Limited | Manufacturing | 1986 |
| Oxlit Limited | Professional & scientific | 2007 |
| Oxlogica Limited | Information & communication | 2024 |
| Oxmove Limited | Transport & logistics | 2025 |
| Oxnaford Limited | Wholesale & retail | 2025 |
| OXO Cabs Ltd | Transport & logistics | 2021 |
| OXO Distributors Ltd | Transport & logistics | 2025 |
| OXO Hire Ltd | Transport & logistics | 2020 |
| OXO Medical Ltd | Health & social care | 2018 |
| OXO Ride Ltd | Transport & logistics | 2025 |
| Oxocom Limited | Extraterritorial | 2001 |
| Oxomedi Trading Limited | Wholesale & retail | 2026 |
| Oxon Cards Ltd | Wholesale & retail | 2026 |
| Oxon Care Cars Ltd | Transport & logistics | 2025 |
| Oxon Care Limited | Health & social care | 2019 |
| Oxon Cars Oxford Ltd | Transport & logistics | 2025 |
| Oxon Chauffeurs Ltd | Transport & logistics | 2025 |
| Oxon Cleaning Services Ltd | Water & waste | 2020 |
| Oxon Impact Limited | Professional & scientific | 2016 |
| Oxon IT Support Ltd | Information & communication | 2010 |
| Oxon Plumbing Limited | Construction | 2025 |