| THE H D H Wills 1965 Charitable Trust | Professional & scientific | 2006 |
| THE Hall (Media Facilities) Limited | Information & communication | 1982 |
| THE Heythrop Hunt Limited | Arts & recreation | 2003 |
| THE Independent Progression PUB Company Ltd | Hospitality | 2018 |
| THE Joinery Shop (Oxon) Ltd | Manufacturing | 2019 |
| THE Journal of Chinese Medicine Ltd | Information & communication | 2002 |
| THE Kitchen Garden People Ltd | Agriculture & fishing | 2016 |
| THE Lela Initiative CIC | Information & communication | 2022 |
| THE Living Room Cinema Chipping Norton Ltd | Information & communication | 2022 |
| THE London Wellbeing & Nutrition Clinic Ltd | Health & social care | 2022 |
| THE Lovejuice Corporation Ltd | Manufacturing | 2025 |
| THE Modern Majesty Ltd | Wholesale & retail | 2024 |
| THE Mowing Boys Ltd | Administrative & support | 2020 |
| THE Neasham Glasgow Family Company Limited | Other services | 2025 |
| THE Old Bakehouse, Chadlington | Real estate | 2024 |
| THE Old Bakery (Charlbury) Management Company Limited | Households | 2015 |
| THE Old Chapel Chipping Norton Management Company Ltd | Households | 2015 |
| THE Old Pill Factory Limited | Wholesale & retail | 2010 |
| THE Old ZOO (Heythrop) Ltd | Other services | 1977 |
| THE Partridge Covert Water Co Limited | Extraterritorial | 2010 |
| THE Plough (Kingham) Limited | Hospitality | 2020 |
| THE Private Driver Company Ltd | Transport & logistics | 2020 |
| THE Remedy Practice Ltd | Health & social care | 2025 |
| THE Rose & Crown (Charlbury) Ltd | Hospitality | 2011 |
| THE Rustic Bean Chipping Norton Limited | Hospitality | 2022 |
| THE Rychward Property Partnership LLP | | 2021 |
| THE Salford Inn (Salford) Limited | Hospitality | 2021 |
| THE Septic Tank Store Ltd | Wholesale & retail | 2001 |
| THE Shambles Food Events Ltd | Hospitality | 2023 |
| THE Silvie Fleming Collection Limited | Arts & recreation | 2007 |
| THE Smart Finance Director Ltd | Professional & scientific | 2000 |
| THE Smart Finance Team Ltd | Professional & scientific | 2021 |
| THE Smart Team Ltd | Professional & scientific | 2019 |
| THE Speakup Coach Limited | Administrative & support | 2020 |
| THE Stone and Fuel Company Limited | Wholesale & retail | 2020 |
| THE Swan Inn Wychwood Limited | Hospitality | 2017 |
| THE Tapestry Agency Limited | Information & communication | 2018 |
| THE Teddy Bearys Ltd | Administrative & support | 2017 |
| THE Tipp.C Events Company Ltd | Hospitality | 2022 |
| THE Town Nursery Ltd | Health & social care | 2014 |
| THE Wanderer's Rest Ltd | Manufacturing | 2023 |
| THE Wholesaler (UK) Limited | Information & communication | 2005 |
| THE Wychwood Co. Ltd. | Information & communication | 2025 |
| THE Wychwood Professional Shop Limited | Wholesale & retail | 2012 |
| THE Wychwoods Day Centre Limited | Health & social care | 1998 |
| Theatrico Limited | Manufacturing | 2022 |
| Thenewbys Ltd | Information & communication | 2023 |
| Therapi Natural Products Ltd | Agriculture & fishing | 2006 |
| Thermal Imaging Services (UK) Limited | Professional & scientific | 2003 |
| Thhk Limited | Other services | 1950 |
| Thistle & Fern Ltd | Wholesale & retail | 2019 |
| Thompson Heating and Plumbing Limited | Construction | 2002 |
| Thomson and Thomson Ltd | Professional & scientific | 2018 |
| Thomson Premier CRU Limited | Financial services | 2020 |
| Threadco Clothing Ltd | Wholesale & retail | 2026 |
| Threads and Fibre Ltd | Wholesale & retail | 2020 |
| Three Oaks Renewable Energy Park Ltd | Energy | 2022 |
| Three Oaks REP Extension Ltd | Energy | 2025 |
| Three SIX Nine Ecommerce Limited | Wholesale & retail | 2023 |
| Three Valleys Osteopathy Ltd | Health & social care | 2022 |
| Thrive Cleaning Solutions Ltd | Administrative & support | 2025 |
| Thunder Design Limited | Professional & scientific | 1993 |
| Thunder Limited | Extraterritorial | 1999 |
| Tiber Course Ltd | Education | 2026 |
| Tidymetrics Ltd | Information & communication | 2025 |
| Tiles of Stow Limited | Manufacturing | 1998 |
| TIM Burrows Agricultural Services Ltd | Administrative & support | 2021 |
| TIM Cook Kitchens Ltd | Manufacturing | 2026 |
| TIM FRY Landrovers Limited | Wholesale & retail | 2000 |
| TIM Harrington Associates Limited | Professional & scientific | 2003 |
| TIM Ritchie & Associates Limited | Other services | 2000 |
| Tiny Tails Club Limited | Other services | 2026 |
| Tinystack Studios Ltd | Professional & scientific | 2025 |
| Tiptop Storage Containers Ltd | Wholesale & retail | 2012 |
| Tivers Limited | Real estate | 2016 |
| Tonk Ltd | Other services | 2020 |
| Top Tier Interiors Limited | Construction | 2026 |
| Topiarus Horticulture Limited | Administrative & support | 2008 |
| Tops L Sailcruise Limited | Arts & recreation | 1987 |
| Topseedo Limited | Information & communication | 2017 |
| Total Track Solutions Ltd | Manufacturing | 2019 |
| Track Powder Training Limited | Administrative & support | 2003 |
| Tree Frontiers Limited | Professional & scientific | 2010 |
| Treetech Arboricultural Services Ltd | Agriculture & fishing | 2011 |
| Trew Management Limited | Professional & scientific | 2011 |
| Trew Music Ltd | Information & communication | 2015 |
| Triple a Motor Factors Limited | Wholesale & retail | 2003 |
| Triq Healthcare UK Ltd. | Wholesale & retail | 2024 |
| Trusted Flooring Solutions Limited | Construction | 2017 |
| Trusted-Tiling Ltd | Construction | 2026 |
| TSB Design Studio Ltd | Professional & scientific | 2024 |
| TSK Golf Services Limited | Arts & recreation | 2010 |
| TTM Electrical Oxford Ltd | Construction | 2024 |
| Tugwell Building Ltd | Construction | 2022 |
| Tugwell Carpentry Ltd | Manufacturing | 2025 |
| Tulloch and Boggis Limited | Administrative & support | 2015 |
| Turnkey Design Solutions Ltd | Professional & scientific | 2024 |
| Tusk Developments Limited | Construction | 2004 |
| Twisted Punk Limited | Professional & scientific | 2021 |
| TY Cycles Ltd | Manufacturing | 2017 |