| Teddy's Solutions Ltd | Administrative & support | 2023 |
| Teecee Contracts Ltd | Information & communication | 2012 |
| Tejas Music Limited | Information & communication | 2016 |
| Tellus Natural Capital Limited | Professional & scientific | 2021 |
| Terp:Tastic Limited | Professional & scientific | 2014 |
| THE 4TH Partnership Ltd | Professional & scientific | 2022 |
| THE Atrium Wellness Collective Limited | Other services | 2023 |
| THE Beast Factory Ltd | Wholesale & retail | 2021 |
| THE Blackbird Inn Ltd | Hospitality | 2025 |
| THE Box TV Motion Design Limited | Information & communication | 2019 |
| THE Burrow Coffee House Ltd | Hospitality | 2024 |
| THE Charles Elliott Laundry Company Limited | Administrative & support | 2024 |
| THE Charles Elliott Property Co Limited | Real estate | 2020 |
| THE Coffee Guys Banbury Ltd | Hospitality | 2024 |
| THE College of Fire Ltd | Education | 2026 |
| THE Comms Exchange Ltd | Administrative & support | 2013 |
| THE Design Parlour Ltd | Wholesale & retail | 2022 |
| THE Diversity Standards Collective Ltd | Professional & scientific | 2019 |
| THE EGG Shed Abbey Farm Limited | Agriculture & fishing | 2025 |
| THE Finishing Touch Unpacking Services Limited | Other services | 2000 |
| THE Fire Safety Academy Ltd | Extraterritorial | 2024 |
| THE Game DEV Group Ltd | Information & communication | 2019 |
| THE Glow Room Brackley Ltd | Other services | 2025 |
| THE Good Toy Guide Limited | Information & communication | 2012 |
| THE James Marketing Group Ltd | Professional & scientific | 2020 |
| THE Judith Hearn Agency Limited | Administrative & support | 1995 |
| THE Legacy Advice Group Ltd | Real estate | 2023 |
| THE Mobile Abbatoir Company Ltd | Manufacturing | 2024 |
| THE Moody Mare Events Limited | Hospitality | 2024 |
| THE Movement Studio 2 Limited | Arts & recreation | 2025 |
| THE Movement Studio Limited | Arts & recreation | 2016 |
| THE New Factory Limited | Manufacturing | 2009 |
| THE Old Chapel Technology Ltd | Information & communication | 2020 |
| THE Olives Properties Ltd | Real estate | 2024 |
| THE Only Group Holdings Ltd | Other services | 2025 |
| THE Only Horror Company CIC | Other services | 2025 |
| THE Orchid Dental & Aesthetic Clinic Ltd | Health & social care | 2021 |
| THE Oxford Plumber Ltd | Construction | 2011 |
| THE Paddocks (Silverstone) Limited | Professional & scientific | 2024 |
| THE Pimlico Plumbers Group Limited | Real estate | 1994 |
| THE Production Hire Company Ltd | Administrative & support | 2002 |
| THE Prom Dress Cabin Limited | Wholesale & retail | 2024 |
| THE Property Addicts Limited | Real estate | 2024 |
| THE Reids Club Limited | Other services | 2021 |
| THE Reno Stylist Limited | Real estate | 2021 |
| THE Steane Herd Limited | Agriculture & fishing | 2016 |
| THE Stratton Arms Ltd | Hospitality | 2025 |
| THE Sun HUT Tanning Ltd | Other services | 2023 |
| THE Village Inn Whitfield Ltd | Hospitality | 2025 |
| THE Well Retreat Limited | Other services | 2015 |
| THE Wellness Finder Ltd | Health & social care | 2024 |
| THE Willow Agency Limited | Administrative & support | 1995 |
| Thee Baguette Shop Brackley Limited | Hospitality | 2012 |
| Therapyfast Ltd | Professional & scientific | 2025 |
| Thirstee Business Limited | Wholesale & retail | 2000 |
| Thomas Honour Mortgage Services Limited | Financial services | 2020 |
| Thorney Limited | Wholesale & retail | 2003 |
| Thornton Nash Ltd | Professional & scientific | 2018 |
| Three C Limited | Professional & scientific | 2003 |
| Three Oaks Group Ltd | Financial services | 2026 |
| Three Suns Limited | Wholesale & retail | 2023 |
| Tides Service Solution Limited | Manufacturing | 2012 |
| Tidy Office Solutions Limited | Other services | 2014 |
| Tidy Property (Holdings) Ltd | Other services | 2019 |
| Tidy Property Solutions Limited | Other services | 2015 |
| Tiggle Limited | Construction | 2019 |
| Tilt Futures Ltd | Administrative & support | 2010 |
| Time 4 U Beauty Limited | Other services | 2013 |
| Timothy Edward Associates Limited | Construction | 2014 |
| TIP Top Tails Brackley Ltd | Other services | 2023 |
| TIP Top Tails Pet Supplies Ltd | Wholesale & retail | 2023 |
| TJC Plant Group Limited | Construction | 2002 |
| TJC Plant Holdings Limited | Administrative & support | 2023 |
| TJM Stone Walling Ltd | Construction | 2019 |
| TK Builditwell Limited | Construction | 2017 |
| TL Electrical Brackley Ltd | Wholesale & retail | 2010 |
| Tnms Financial Management Ltd | Financial services | 2014 |
| Tollgate Court Limited | Construction | 2014 |
| Tonic Careers Limited | Information & communication | 2017 |
| Tony Dalmedo Interim Limited | Hospitality | 2017 |
| Tony Herring Associates Limited | Professional & scientific | 2003 |
| Tony Kersey Consulting Ltd | Other services | 2024 |
| Top Dog Day Care Limited | Other services | 2013 |
| Top Dog Ventures Limited | Other services | 2014 |
| Topaz Holdings Ltd | Construction | 2017 |
| Topserve Autos Limited | Wholesale & retail | 2003 |
| Topshed Consulting Ltd | Information & communication | 2015 |
| Total Geotechnical Consulting Ltd | Professional & scientific | 2023 |
| Totally ‘Armless Limited | Wholesale & retail | 2025 |
| Town and Country Plumbing and Heating Limited | Construction | 2002 |
| Town Farm Brackley Management Company Ltd | Administrative & support | 2015 |
| Town Garage (Brackley) Limited | Wholesale & retail | 2012 |
| Trackside Electronics Limited | Manufacturing | 2025 |
| Trade Winds Consultants Limited | Construction | 2012 |
| Training in Catering Services Limited | Professional & scientific | 2005 |
| Traxx Plant Hire Limited | Administrative & support | 2024 |
| Tredwell Bros Limited | Real estate | 2017 |
| Trelin (Cornwall) Limited | Hospitality | 1992 |
| Trilby Wood Limited | Financial services | 2017 |
| Trinity Event Solutions Limited | Administrative & support | 2006 |