| Tabac Creative Ltd | Information & communication | 2017 |
| Taberu Cuisine Limited | Hospitality | 2025 |
| Tabs 2 Tax Limited | Professional & scientific | 2013 |
| TAC NET Limited | Administrative & support | 2003 |
| Tacpac Ltd | Education | 2009 |
| TAD Audio Limited | Professional & scientific | 2019 |
| Tagitfindit Limited | Information & communication | 2013 |
| Tahmid Store Ltd | Wholesale & retail | 2019 |
| Tailored Clinical Research Solutions Limited | Professional & scientific | 2015 |
| TAJ Trade Limited | Hospitality | 2018 |
| Takindex Ltd | Information & communication | 2022 |
| TAL Festival C.I.C. | Arts & recreation | 2009 |
| Talboys Utility Services (Oxford) Limited | Construction | 2003 |
| Talcian Ltd | Real estate | 2023 |
| Talent CRM Ltd | Information & communication | 2020 |
| Talenta Consulting Limited | Professional & scientific | 2021 |
| Tallwest Ltd | Real estate | 2000 |
| Talmage's Limited | Extraterritorial | 2024 |
| Taloncross Limited | Real estate | 1981 |
| Tamar Consultancy Limited | Professional & scientific | 2016 |
| Tamesis Engineering Ltd | Professional & scientific | 2024 |
| Tammiz Ltd | Wholesale & retail | 2024 |
| Tamu Teeth Ltd | Health & social care | 2025 |
| Tanadex Limited | Hospitality | 2020 |
| Tanaka Care Ltd | Health & social care | 2016 |
| Tandem Oxford CIC | Arts & recreation | 2015 |
| Tandoori Burger House Limited | Hospitality | 2025 |
| Tandy Corporation Ltd | Wholesale & retail | 2002 |
| Tang Property Holdings Ltd | Real estate | 2026 |
| Tanisha Trading Ltd | Wholesale & retail | 2025 |
| Tanners Yard Ltd | Real estate | 2024 |
| Tanquility Limited | Other services | 1997 |
| Tanukii Studios Limited | Information & communication | 2007 |
| Tanvix PVT Ltd | Wholesale & retail | 2026 |
| TAO Beauty Salon Ltd | Other services | 2023 |
| TAP Social Brewing Limited | Manufacturing | 2014 |
| TAP Social Events Limited | Hospitality | 2020 |
| TAP Social Movement Limited | Manufacturing | 2016 |
| TAP Social Taproom Limited | Hospitality | 2020 |
| Tapas Y Besos Limited | Hospitality | 2025 |
| Taquet Consulting Ltd | Professional & scientific | 2024 |
| Target (Oxford) Car & Van Hire | | 1989 |
| Tariq and Sons Trading Ltd | Wholesale & retail | 2025 |
| TAS Silk & Spice Limited | Wholesale & retail | 2024 |
| Tasa YTC Ltd | Professional & scientific | 2025 |
| Tash Kitchen Caribbean Twist Ltd | Hospitality | 2025 |
| Tash Kitchen Ltd | Hospitality | 2020 |
| Tasmin Pyper Limited | Wholesale & retail | 2015 |
| Taste Tibet Ltd | Hospitality | 2017 |
| Tasty Kitchen Ltd | Hospitality | 2023 |
| Tatkoit Ltd | Arts & recreation | 2017 |
| Tax Accounts Plus Ltd | Professional & scientific | 2020 |
| Tax Simplification Limited | Professional & scientific | 2017 |
| Taxaction Consulting Limited | Professional & scientific | 2012 |
| Taxi Express Oxford Ltd | Transport & logistics | 2025 |
| Taylor Design & Build Oxford Ltd | Construction | 2024 |
| Taylor Manpower Limited | Administrative & support | 2025 |
| Taylors of Oxford Limited | Hospitality | 2025 |
| Taylors Services (Oxford) Limited | Construction | 2006 |
| Taylors Transport Limited | Mining & quarrying | 1994 |
| Tayyab Properties Limited | Real estate | 2026 |
| Tbay FHL Limited | Real estate | 2024 |
| TBI Communications Limited | Professional & scientific | 2005 |
| TBR Developments Limited | Construction | 2023 |
| TC Thatching Ltd | Construction | 2025 |
| Tc&Q Management Ltd | Professional & scientific | 2010 |
| TC2 Group Limited | Professional & scientific | 2020 |
| TCR2 Ltd | Information & communication | 2018 |
| TD2M Ltd | Real estate | 2025 |
| TD66 Limited | Information & communication | 2012 |
| TDN Pool Services Ltd | Other services | 2025 |
| TDR Aero Ltd | Manufacturing | 2024 |
| TDS Logistics Ltd | Transport & logistics | 2011 |
| Teachers to Your Home Ltd | Education | 2014 |
| Tealvale Limited | Professional & scientific | 1983 |
| Team Dimensions Ltd | Information & communication | 2013 |
| Team ITZ 2 Ltd | Hospitality | 2022 |
| Team Newbury South Ltd | Hospitality | 2024 |
| Team TI Ltd | Hospitality | 2017 |
| Teazy Ltd | Wholesale & retail | 2025 |
| Tech Hero Ltd | Wholesale & retail | 2020 |
| Tech Leaders Connect Ltd | Information & communication | 2021 |
| Tech Trade Oxford Ltd | Wholesale & retail | 2024 |
| Tech-Enabled Law Limited | Extraterritorial | 2008 |
| TECH43 Ltd | Wholesale & retail | 2021 |
| Techcrew Productions Ltd | Professional & scientific | 2013 |
| Techgfx Technologies Limited | Information & communication | 2024 |
| Technite Limited | Information & communication | 2024 |
| Techno Trade Solutions Limited | Wholesale & retail | 2024 |
| Techno Transformers Limited | Manufacturing | 1993 |
| Techno-Airesearch Solutions Limited | Information & communication | 2024 |
| Technovis Ltd | Information & communication | 2008 |
| Technovis Properties Limited | Real estate | 2021 |
| Techpixies Limited | Information & communication | 2016 |
| Teckmap Ltd | Wholesale & retail | 2023 |
| Teddy Bears Limited | Professional & scientific | 1989 |
| Teddy Edwards Limited | Wholesale & retail | 2011 |
| Teduk Ltd | Administrative & support | 2023 |
| Teekayfilms Ltd | Information & communication | 2025 |
| Telclo Limited | Construction | 2010 |