| Stonor Limited | Information & communication | 2007 |
| Stoyan IT Solutions Limited | Information & communication | 2017 |
| Strategic Vision Wealth Limited | Financial services | 2009 |
| Strigissime Ltd | Professional & scientific | 2022 |
| Stulz Modular Limited | Other services | 2012 |
| Subliminal Ltd | Professional & scientific | 2025 |
| Succession Plus UK Ltd | Professional & scientific | 2019 |
| Sultana Estates Limited | Real estate | 2020 |
| Summersgate Management Company Limited | Households | 2002 |
| Summertown Garage Limited | Wholesale & retail | 2005 |
| Summit Speaking Ltd | Education | 2025 |
| Sun Rise UP Ltd | Administrative & support | 2021 |
| Sundance Confectionery Ltd | Wholesale & retail | 2019 |
| Sunmat Limited | Construction | 2019 |
| Sustainable Asset Maintenance Services Ltd | Administrative & support | 2024 |
| SVE Legacy Limited | Real estate | 2025 |
| SW Sports Coaching Ltd | Arts & recreation | 2013 |
| SYM Wear Ltd | Wholesale & retail | 2025 |
| Syncwell Ltd | Health & social care | 2024 |
| T Hunt Consulting Co Limited | Other services | 2019 |
| T.G. West & SON Limited | Construction | 1954 |
| T.H.Kingerlee & Sons Limited | Real estate | 1961 |
| TAB Commercial Property Ltd | Real estate | 2023 |
| TAB Property Limited | Real estate | 2021 |
| Tackley Village Shop C.I.C. | Wholesale & retail | 2000 |
| TAN Courier Services Ltd | Administrative & support | 2017 |
| Taurus Tiling Services Ltd | Construction | 2025 |
| Taurus Training (Oxford) Limited | Arts & recreation | 2011 |
| Taverners Place Management Limited | Households | 2013 |
| Team Recruitment (Oxford) Limited | Administrative & support | 2004 |
| Team Watson Ltd | Information & communication | 2025 |
| Techkart Ltd | Wholesale & retail | 2026 |
| Technyma Ltd | Manufacturing | 2022 |
| Tecnodata UK Limited | Information & communication | 2013 |
| Telelink System Limited | Information & communication | 2012 |
| Tellthechef.Com Ltd | Information & communication | 2011 |
| Temperate Ltd | Professional & scientific | 2024 |
| Temple Bookbinders Limited | Manufacturing | 2007 |
| Temple Heights Limited | Households | 2007 |
| Tennisox Limited | Administrative & support | 2024 |
| TER2YOU Ltd | Professional & scientific | 2023 |
| Terinex Limited | Manufacturing | 2003 |
| Terra Luma Ltd | Information & communication | 2025 |
| Thackley END Management Limited | Households | 1982 |
| Thames Valley Business Crime Reduction Partnership Limited | Information & communication | 2024 |
| THE Aviation Auction Limited | Transport & logistics | 2017 |
| THE Aylesbury Vale Academy | Education | 2008 |
| THE Bletchingdon Community Foundation | Health & social care | 2011 |
| THE Bunkers Hill Management Company Limited | Households | 1999 |
| THE Charlbury Group Limited | Information & communication | 2007 |
| THE Chilterns Management Company Limited | Households | 1989 |
| THE Clarkson Alliance Ltd | Other services | 2003 |
| THE Claydon Freehold Limited | Real estate | 2002 |
| THE Crofters Meadow Management Company Limited | Real estate | 1999 |
| THE Early Years Nursery (Kidlington) Ltd | Education | 2014 |
| THE Firs Residents Association Limited | Households | 1995 |
| THE Flooring Company (Oxford) Ltd | Construction | 2021 |
| THE Great British Puzzle Company Limited | Information & communication | 2017 |
| THE Heyes Management Company Limited | Households | 1989 |
| THE Heyford Rectory Management Company Limited | Households | 2006 |
| THE Independent Financial Advice Company(Uk) Ltd | Extraterritorial | 2013 |
| THE International Network for Delivery of Regulation Limited | Education | 2021 |
| THE Ivies (Wantage) Management Company Limited | Households | 2017 |
| THE Jinking Hares Ltd | Hospitality | 2023 |
| THE Lodge (Oxford) Residents Association Limited | Households | 2011 |
| THE Lofts Apartments Freehold Company Limited | Households | 2023 |
| THE Lovelace Square Management Company Limited | Households | 1997 |
| THE Maltings Chipping Norton Management Company Limited | Households | 2025 |
| THE Marlborough Arms Ltd | Hospitality | 2010 |
| THE Mgroup (Oxford) Limited | Extraterritorial | 2002 |
| THE Mgroup Audit Ltd | Professional & scientific | 2024 |
| THE Mgroup Computer Solutions LLP | | 2010 |
| THE Mgroup Corporate Finance LLP | | 2009 |
| THE Mgroup Partnership LLP | | 2009 |
| THE Mgroup Secretarial Services Limited | Extraterritorial | 2004 |
| THE Midland Aeroplane Company Ltd | Manufacturing | 2019 |
| THE Modern Farmhouse Lifestyle Limited | Wholesale & retail | 2024 |
| THE Money Consultancy Limited | Financial services | 2011 |
| THE Mount Project LLP | | 2022 |
| THE NUT Tree Restaurant Limited | Hospitality | 2006 |
| THE Old Diary Blenheim Road Management Limited | Households | 2013 |
| THE Oxford Digital Group Ltd | Information & communication | 2017 |
| THE Oxford Dog Grooming Company Ltd | Other services | 2018 |
| THE Oxford Laundry Company Limited | Other services | 2022 |
| THE Oxford Travel Company Limited | Administrative & support | 1973 |
| THE Oxford Trowel Ltd | Construction | 2020 |
| THE Paddocks (Enstone) Management Company Limited | Households | 2012 |
| THE Planet POD Limited | Information & communication | 2018 |
| THE Playfield Road (Kennington) Management Company Limited | Households | 1999 |
| THE Priory (Bicester) Management Company Limited | Households | 2006 |
| THE Puzzlers Club Limited | Information & communication | 2017 |
| THE Real Wood Furniture Company Ltd | Other services | 2008 |
| THE Remakery Oxford CIC | Water & waste | 2024 |
| THE Rewards Group Limited | Administrative & support | 2003 |
| THE Ridings Management Company Limited | Households | 2008 |
| THE Sempre Group Holdings Ltd | Financial services | 2020 |
| THE Shires Educational Psychology Ltd | Health & social care | 2025 |
| THE Slow Cyclist Ltd. | Administrative & support | 2014 |
| THE Sycamores (Headington) Management Company Limited | Households | 1998 |
| THE Talkhouse (Duval Inns) Ltd | Hospitality | 2019 |