| Trovehill Limited | Health & social care | 2025 |
| Trovo Limited | Information & communication | 2007 |
| Troy Fernandez Limited | Real estate | 2019 |
| Trrp Ltd | Wholesale & retail | 2025 |
| TRU Motorhomes Ltd | Manufacturing | 2023 |
| Tru-Gen Ltd | Professional & scientific | 2023 |
| Tru-Locums PVT Limited | Health & social care | 2008 |
| Tru-Shine Cleaning 1 Ltd | Professional & scientific | 2019 |
| Trubone Orthodesign Limited | Wholesale & retail | 2025 |
| Truck and Trailer (Blackburn) Ltd | Transport & logistics | 2007 |
| Truck Doctor Limited | Transport & logistics | 2023 |
| Truck Inspectors Limited | Wholesale & retail | 2024 |
| Truck Pro Services Ltd | Wholesale & retail | 2024 |
| Trucker-Jarek Ltd | Transport & logistics | 2011 |
| Truckers United Savings and Credit Alliance Ltd | Transport & logistics | 2025 |
| Trudys Limited | Health & social care | 2013 |
| True Apparels Limited | Manufacturing | 2025 |
| True Blue Dance Academy Limited | Arts & recreation | 2023 |
| True Blue Wills Ltd | Professional & scientific | 2016 |
| True Catch Ltd | Hospitality | 2024 |
| True Colours Group Ltd | Construction | 2023 |
| True Grid Utilities Ltd | Administrative & support | 2025 |
| True Ingenuity Ltd | Information & communication | 2020 |
| True Landscapes Ltd | Construction | 2024 |
| True Lens Services (Holdings) Limited | Financial services | 2020 |
| True Lens Services Limited | Manufacturing | 2001 |
| True North Aviation Limited | Transport & logistics | 2025 |
| True Pace Ltd | Wholesale & retail | 2025 |
| True Path Enerugi Ltd | Health & social care | 2025 |
| True Signal Media Ltd | Information & communication | 2025 |
| True Thinking Ltd | Information & communication | 2019 |
| TRUE22 Ltd | Wholesale & retail | 2021 |
| Trueblue Direct Group Limited | Wholesale & retail | 2018 |
| Truelec Control Systems Limited | Manufacturing | 2002 |
| Trueline Contractors Ltd | Construction | 2025 |
| Trueline Interiors Ltd | Construction | 2024 |
| Trueman & Grundy Estate Agents Ltd | Real estate | 2012 |
| Trueman Construction Ltd | Construction | 2023 |
| Truenorth Strategies Ltd | Professional & scientific | 2025 |
| Truepath-Consulting Ltd | Information & communication | 2025 |
| Truesafe Security Limited | Administrative & support | 2024 |
| Truestaff Recruitment Ltd | Administrative & support | 2026 |
| Trueway UK Limited | Administrative & support | 2020 |
| Truffles Bar Limited | Hospitality | 2023 |
| Trulax Remedies Ltd | Wholesale & retail | 2025 |
| Trulive Ltd | Real estate | 2025 |
| Trushal Optometry Ltd | Administrative & support | 2017 |
| Trushna Eats Limited | Hospitality | 2026 |
| Trust Group Holdings Ltd | Public administration | 2016 |
| Trust Security Group Ltd | Administrative & support | 2018 |
| Trust US Direct Ltd | Health & social care | 2015 |
| Trust WE Care Limited | Administrative & support | 2019 |
| Trust WE Care Property Limited | Real estate | 2022 |
| Trustlet Agents Ltd | Real estate | 2024 |
| Truth Club Leicester Limited | Hospitality | 2019 |
| Truth Estates Ltd | Real estate | 2021 |
| Truvim England Ltd | Professional & scientific | 2023 |
| TRV Electrical Systems Limited | Construction | 2008 |
| TRV Properties Ltd | Real estate | 2018 |
| TRW Building Ltd | Professional & scientific | 2024 |
| TRY Different Ltd | Information & communication | 2026 |
| TS & CC Johnnay Services Limited | Health & social care | 2013 |
| TS (Holdings) Group Limited | Wholesale & retail | 2022 |
| TS Electrical Contractors Ltd | Construction | 2018 |
| TS Enterprises Group Limited | Hospitality | 2025 |
| TS Finance Limited | Financial services | 2025 |
| TS Leicester Limited | Hospitality | 2024 |
| TS Locum Services (Leicester) Limited | Professional & scientific | 2012 |
| TS Private Limited | Health & social care | 2020 |
| TS Royce Property Ltd | Real estate | 2024 |
| TS Trade Ltd | Extraterritorial | 2017 |
| Tsanteleina Ltd | Households | 2021 |
| TSB Trans (UK) Ltd | Transport & logistics | 2025 |
| TSF East Midlands Limited | Education | 2022 |
| TSF West Midlands Limited | Education | 2022 |
| TSF Worcestershire Limited | Education | 2023 |
| Tshirt Factory Printing Limited | Manufacturing | 2024 |
| Tshirt Factory Processing House Ltd | Manufacturing | 2021 |
| Tshirt Guru Limited | Wholesale & retail | 2017 |
| TSK Trade Limited | Wholesale & retail | 2018 |
| TSM Property Holdings Limited | Real estate | 2024 |
| TSO Logistics Ltd | Transport & logistics | 2018 |
| Tsou Envision Ltd | Hospitality | 2023 |
| TSP 2.3 Limited | Hospitality | 2018 |
| TSR Care Limited | Health & social care | 2017 |
| TSR MED Ltd | Health & social care | 2022 |
| TSS Electrical Contractors Ltd | Construction | 2026 |
| TSS FM Ltd | Administrative & support | 2025 |
| TSS Global Ltd | Health & social care | 2026 |
| TSS Group Holdings Limited | Construction | 2025 |
| TSS Trading Limited | Wholesale & retail | 2016 |
| Tssr Ltd | Information & communication | 2025 |
| TSW Properties Ltd | Real estate | 2024 |
| TT Adlington Limited | Professional & scientific | 2017 |
| TT Autos Leicester Ltd | Wholesale & retail | 2024 |
| TT EDI Enterprise Ltd | Water & waste | 2021 |
| TT Fitness Leicester Limited | Arts & recreation | 2025 |
| TT Global Trading Ltd | Wholesale & retail | 2026 |
| TT Staffing Limited | Health & social care | 2018 |
| TT Transport Leicester Ltd | Transport & logistics | 2020 |