| Thames Valley Recruitment Ltd | Professional & scientific | 2008 |
| THE Art Framing Workshop Ltd | Manufacturing | 2020 |
| THE Baptist Missionary Society | Other services | 2017 |
| THE Boddey Company Limited | Manufacturing | 2006 |
| THE Carnaudmetalbox Benevolent Fund Limited | Financial services | 1951 |
| THE Flooring Centre (Witney) Limited | Wholesale & retail | 2007 |
| THE Lighthouse Nursery School Limited | Education | 2010 |
| THE Oxford Toy Company Limited | Manufacturing | 1989 |
| THE School of ST. Helen and ST. Katharine Trust | Education | 1983 |
| THE Valspar (UK) Finco Limited Partnership | | 1999 |
| THE Warren (Thame) Management Company Limited | Households | 2002 |
| THG Hairdressing Limited | Other services | 2010 |
| Thinking Software Limited | Extraterritorial | 1992 |
| Third ACT Consultancy Limited | Professional & scientific | 2021 |
| Thomson Composite Solutions Limited | Professional & scientific | 2005 |
| TIM Davis Contracts Limited | Construction | 2003 |
| Toby Blackwell Limited | Professional & scientific | 2005 |
| Tolly Mcrae Limited | Administrative & support | 2014 |
| Tower House (Thame) Management Company Limited | Households | 1985 |
| Towerband Limited | | 1988 |
| Trails for Tails Ltd | Extraterritorial | 2010 |
| Travelodge Hotels Limited | Hospitality | 1963 |
| Upton Horse Trials Ltd | Administrative & support | 2019 |
| Urban Refugee Solutions Limited | Professional & scientific | 2013 |
| V and S Services (Abingdon) Limited | Construction | 2012 |
| Vanbrugh Management Limited | Real estate | 2005 |
| Vanbrugh Trustees Limited | Professional & scientific | 2005 |
| Vanbrugh Trustees NO. 2 Limited | Professional & scientific | 2006 |
| Venables Properties Limited | Real estate | 1997 |
| Venture Electronics Engineering Limited | Manufacturing | 2026 |
| Veraya Limited | Real estate | 2019 |
| Veronalder Limited | Wholesale & retail | 1978 |
| Veroni's Developments Limited | Construction | 1997 |
| Vertical Cabinet Company Limited | Real estate | 1965 |
| Victoria Place Administrative Company Limited | Real estate | 1988 |
| Viewteam Technologies Limited | Information & communication | 2025 |
| VN Accountancy & Bookkeeping Limited | Professional & scientific | 2021 |
| Voxmicro Limited | Information & communication | 2006 |
| Waygood Ltd | Information & communication | 1997 |
| Ways and Means Limited | Professional & scientific | 1999 |
| Wellness Plan Consultancy Ltd | Other services | 2024 |
| West Oxon Ltd | Hospitality | 2023 |
| Westwinds Solutions Ltd | Administrative & support | 2013 |
| Whitley Farms Limited | Agriculture & fishing | 1952 |
| Williams & Long Limited | Wholesale & retail | 1975 |
| Witney Barber Ltd | Other services | 2018 |
| Wootton Bros. (Contractors) Limited | | 1950 |
| Workham (Barnwood) Limited | Real estate | 2006 |
| Worton Farms Limited | Agriculture & fishing | 1992 |
| X-Net Solutions ( Oxford ) Ltd | Information & communication | 2004 |
| Zascar Limited | Professional & scientific | 2004 |