| Together Compliance Limited | Professional & scientific | 2020 |
| Tolki Ltd | Wholesale & retail | 2025 |
| Tolley Films Ltd | Information & communication | 2024 |
| TOM Finnigan Orthopaedics Ltd | Health & social care | 2018 |
| TOM Hunter Ltd | Professional & scientific | 2026 |
| TOM N Team Limited | Construction | 2017 |
| Tomale.Ai Limited | Information & communication | 2024 |
| Tony Price Creative Limited | Professional & scientific | 2012 |
| Toomics Global UK Limited | Administrative & support | 2020 |
| Tooth Talk Group (Holdings) Limited | Health & social care | 2025 |
| Toothstix Limited | Wholesale & retail | 2024 |
| Top Gear (NW) Ltd | Wholesale & retail | 2017 |
| Top Gear MC Ltd | Wholesale & retail | 2016 |
| Topwright Ltd | Arts & recreation | 2018 |
| Torentus Limited | Construction | 2019 |
| Torque Consulting Limited | Administrative & support | 2019 |
| Torsion Consult Limited | Other services | 2013 |
| Torton Investments Limited | Real estate | 1999 |
| Torzamotive Ltd | Wholesale & retail | 2023 |
| Total Deep Clean Ltd | Administrative & support | 2011 |
| Total Fitness Aquatics Limited | Arts & recreation | 2016 |
| Total Fitness HC Holdings Limited | Arts & recreation | 2010 |
| Total Fitness Health Clubs Group Limited | Professional & scientific | 2014 |
| Total Fitness Health Clubs Limited | Arts & recreation | 2010 |
| Total Fitness Laser Limited | Health & social care | 1999 |
| Total Swim Limited | Arts & recreation | 2015 |
| Totally TT Limited | Health & social care | 2026 |
| Tower Medical Ltd | Health & social care | 2019 |
| Tower Property (Manchester) Ltd | Real estate | 2016 |
| Town & Country Homes Ltd | Administrative & support | 2013 |
| Town Hall Dental Ltd | Health & social care | 2012 |
| Townson Estates Limited | Construction | 1970 |
| Tpeg Green Limited | Health & social care | 2025 |
| Track Attack Ltd | Wholesale & retail | 2022 |
| Track My Casa Ltd | Information & communication | 2025 |
| Trackman Days Limited | Arts & recreation | 2017 |
| Trackman Events Limited | Arts & recreation | 2017 |
| Trackman Golf Events Limited | Arts & recreation | 2017 |
| Tracy Lavin Events Limited | Administrative & support | 2003 |
| Tradevest Ltd | Financial services | 2025 |
| Trading Maintenances Services (Holdings) Limited | Administrative & support | 2010 |
| Trading Maintenances Services (UK) Limited | Manufacturing | 1999 |
| Trafalgar Alliance Limited Partnership | | 2008 |
| Trafford Place Management Company Limited | Administrative & support | 2015 |
| Train With ME Ltd | Information & communication | 2020 |
| Training by AKJ Ltd | Education | 2023 |
| Training Centre (Wilmslow) Limited | Information & communication | 1994 |
| Trakd Partners Ltd | Administrative & support | 2026 |
| Transcend Consultancy Limited | Professional & scientific | 2014 |
| Tranship Limited | Transport & logistics | 2019 |
| Transify Ltd | Information & communication | 2021 |
| Transport Technology Management Limited | Professional & scientific | 2015 |
| Trasporto Veloce Ltd | Transport & logistics | 2023 |
| Tratco Limited | Administrative & support | 2010 |
| Travelbeam Limited | Administrative & support | 1998 |
| TRAVELDEALS4U.CO.UK Ltd | Administrative & support | 2020 |
| Trebleday Design Services Limited | Professional & scientific | 1995 |
| Tregothnan Road Ventures Ltd | Real estate | 2024 |
| Treyo Limited | Health & social care | 2024 |
| TRG25 Limited | Other services | 2019 |
| TRGSB30 Limited | Construction | 2023 |
| Triam Health Ltd | Health & social care | 2025 |
| Tricentric Limited | Professional & scientific | 2021 |
| Triflora International Limited | Wholesale & retail | 2017 |
| Trifolium Consulting Limited | Health & social care | 2018 |
| Trigfa Nominees Limited | Financial services | 2012 |
| Trikon Digital Ltd | Information & communication | 2025 |
| Trimontium AI Ltd | Information & communication | 2026 |
| Trinaya Limited | Health & social care | 2026 |
| Trinity Dental Practice Limited | Health & social care | 2008 |
| Trinity Enterprise Centre Limited | Real estate | 2000 |
| Trinity River Books Ltd | Information & communication | 2025 |
| Trinity Triathlon Ltd | Education | 2024 |
| Triple WIN Limited | Information & communication | 2019 |
| Trisha Diagnostics Limited | Health & social care | 2019 |
| Tristram Reynolds Ltd | Information & communication | 2024 |
| Triton Industry Limited | Professional & scientific | 1969 |
| Triton PLC | Professional & scientific | 1975 |
| Triur Construction UK Ltd | Construction | 2020 |
| TRJ Hill Ltd | Financial services | 2019 |
| Trophybox Ltd | Information & communication | 2025 |
| Tross Contracting Ltd | Professional & scientific | 2025 |
| Trove Associates Limited | Professional & scientific | 2013 |
| TRP Inspired Ltd | Health & social care | 2015 |
| True Assist Limited | Extraterritorial | 2014 |
| Truelove Limited | Wholesale & retail | 2003 |
| Trugenic Developments Ltd. | Administrative & support | 2013 |
| Truth Financial Ltd | Financial services | 2024 |
| Tryangle Limited | Information & communication | 2025 |
| TS Autos (NW) Ltd | Wholesale & retail | 2025 |
| TS Planning Services Ltd | Professional & scientific | 2015 |
| TSA Homes Crewe Ltd | Real estate | 2026 |
| TSA Living Ltd | Construction | 2025 |
| TSA Magnum Ltd | Construction | 2026 |
| TSK Care Limited | Health & social care | 2017 |
| Tsoi Medical Limited | Health & social care | 2024 |
| TU ANH Chau Limited | Health & social care | 2025 |
| Tucker-Wood Medical Ltd | Health & social care | 2026 |
| Tudor Wood Corporate Ltd | Real estate | 2013 |
| Tumblewood Properties Limited | Real estate | 2015 |