| T-Tail Ltd | Manufacturing | 2024 |
| T. Sheasby Carpentry Limited | Manufacturing | 2020 |
| T.C. Dental Equipment Repairs Limited | Manufacturing | 1997 |
| T.W.E. Haulage Limited | Transport & logistics | 1998 |
| T4 Brix Ltd | Wholesale & retail | 2022 |
| Tacasi Limited | Public administration | 2015 |
| Tactical Ltd | Arts & recreation | 2007 |
| Tactile Fusion Limited | Information & communication | 2012 |
| TAF Tennis Coaching Limited | Education | 2024 |
| TAG Smart Limited | Professional & scientific | 2020 |
| Taggs Truck Services Ltd | Wholesale & retail | 2002 |
| Taibma Limited | Health & social care | 2014 |
| Tailored Build Limited | Construction | 2022 |
| Tailored Land (Avenue Road) Limited | Construction | 2024 |
| Tailored Land (Birch Road) Limited | Construction | 2025 |
| Tailored Land (Foundry Street) Limited | Construction | 2024 |
| Tailored Land (Legges Way) Limited | Construction | 2022 |
| Tailored Land (Moss Road) Limited | Construction | 2022 |
| Tailored Land (Warwick Street) Limited | Construction | 2025 |
| Tailored Land Limited | Construction | 2025 |
| Tailored Lifestyle Group Limited | Financial services | 2021 |
| Tailored Living (Midlands) Limited | Real estate | 2019 |
| Tailored Support (Midlands) Limited | Administrative & support | 2024 |
| TAK Positive Parenting Ltd | Health & social care | 2022 |
| Takapahealthcare Ltd | Health & social care | 2016 |
| Takt Limited | Professional & scientific | 2001 |
| Talent Bridge Insights Ltd | Professional & scientific | 2025 |
| Talent Connections (Recruitment) Ltd | Administrative & support | 2024 |
| Talia Aesthetics Limited | Other services | 2025 |
| Talom Cleaning and Storage Ltd | Administrative & support | 2023 |
| Talos Consulting Services Ltd | Professional & scientific | 2018 |
| Tamedwolf Brewery Ltd | Manufacturing | 2021 |
| Tanning 365 UK Limited | Other services | 2026 |
| TAO Enterprises Limited | Construction | 2022 |
| Tapper Interiors Ltd. | Construction | 1964 |
| Tari Organisation Limited | Households | 2025 |
| Tarvers Construction Ltd | Construction | 2021 |
| Tarvers Property Ltd | Real estate | 2021 |
| Tassak Limited | Administrative & support | 2025 |
| Taste Oriental UK Ltd | Hospitality | 2022 |
| Tasteturkey Limited | Wholesale & retail | 2007 |
| Tatianatrans Ltd | Extraterritorial | 2018 |
| Tawakkul Group Ltd | Wholesale & retail | 2024 |
| Tawkam Services Limited | Information & communication | 2018 |
| Tawny Developments Limited | Construction | 2003 |
| Tax Talk Limited | Other services | 2020 |
| Tayab Enterprise Ltd | Wholesale & retail | 2024 |
| Taylor & Taylor (Shires) Limited | Construction | 2016 |
| Taylor and Taylor Limited | Construction | 2018 |
| Taylorcorp Limited | Real estate | 2016 |
| Tayrex-Manny Investment Ltd | Real estate | 2023 |
| TBL Media Limited | Information & communication | 2024 |
| Tbos Law Limited | Extraterritorial | 2018 |
| TC Redwood Holdings Limited | Professional & scientific | 2022 |
| TDZ Telecom Limited | Information & communication | 2016 |
| TE Oak Lane Limited | Households | 2022 |
| TE UK Developers Ltd | Real estate | 2020 |
| Teal Creative Design Limited | Professional & scientific | 2024 |
| Team Symplify Limited | Information & communication | 2016 |
| Teby Healtcare Professionals Ltd | Administrative & support | 2021 |
| Tech Pro Europe Ltd | Information & communication | 2010 |
| Tech Professionals Limited | Administrative & support | 2016 |
| Techhouse Business Limited | Wholesale & retail | 2010 |
| Techhouse Communications Group Limited | Information & communication | 1994 |
| Technical Applications Solutions Ltd | Professional & scientific | 2018 |
| Techno Ninjas Ltd | Information & communication | 2014 |
| Teewai Services Ltd | Professional & scientific | 2017 |
| Tejza Investments Ltd | Real estate | 2022 |
| Tejza Property Limited | Construction | 2020 |
| TEM Plumb Limited | Construction | 2018 |
| TEM Property Holdings Ltd | Real estate | 2025 |
| Templarrail Group Ltd | Extraterritorial | 2018 |
| Temple of Yoga Limited | Arts & recreation | 2024 |
| TEN of Clubs Limited | Wholesale & retail | 2020 |
| TEN Specialist Recruitment Ltd | Administrative & support | 2021 |
| Tender Lawn Care Treatment Limited | Other services | 2010 |
| Tender Love-In Care Ltd | Health & social care | 2024 |
| Tenschul Limited | Professional & scientific | 2019 |
| Teresaandbryonysentertainment Limited | Hospitality | 2024 |
| TES369 Ltd | Administrative & support | 2025 |
| Test Electric (Banbury) Limited | Professional & scientific | 2006 |
| Tetum Solution Ltd | Professional & scientific | 2026 |
| Texgas Plumbing Ltd | Construction | 2022 |
| TF Coaching & Consultancy Ltd | Education | 2026 |
| TFC Care Ltd | Health & social care | 2019 |
| Tforteacher Limited | Education | 2025 |
| TG Projects Banbury Ltd | Other services | 2026 |
| TGG PUB Company Limited | Hospitality | 2024 |
| Thai Business Supports Ltd | Professional & scientific | 2017 |
| THE 4TH Principle Ltd | Information & communication | 2025 |
| THE Accounts Place Limited | Professional & scientific | 2013 |
| THE Agricultural Economics Society | Other services | 2001 |
| THE Andalus Academy Ltd | Education | 2026 |
| THE Apricot Network Limited | Real estate | 2025 |
| THE Arden Rheumatology Service Limited | Health & social care | 2014 |
| THE Association for Classical Mctimoney Limited | Professional & scientific | 2008 |
| THE Autism Consultancy Limited | Health & social care | 2019 |
| THE Banbury Larder CIC | Hospitality | 2024 |
| THE Banbury Therapy Group Limited | Education | 2026 |
| THE Barker Property Investment Company Limited | Real estate | 2014 |