| Trustclean Limited | Administrative & support | 1972 |
| Trustflight Limited | Information & communication | 2017 |
| Tryst Nightclub Limited | Hospitality | 2022 |
| TS Audio Ltd | Information & communication | 2025 |
| TS RM Trading Services Ltd | Health & social care | 2025 |
| TS Stays Limited | Hospitality | 2023 |
| TSA Training UK Ltd | Education | 2026 |
| TSD Restaurant Ltd | Hospitality | 2025 |
| TSF Electrical (Dearne Valley) Ltd | Construction | 2024 |
| TSG Consultancy Ltd | Professional & scientific | 2014 |
| TSG Property Rentals Limited | Real estate | 2024 |
| Tsgriff Management Limited | Financial services | 2022 |
| TSK Business Services Ltd | Professional & scientific | 2024 |
| TSK Hospitality Limited | Hospitality | 2025 |
| TSLP153 Ltd | Extraterritorial | 2023 |
| TSLP162 Ltd | Extraterritorial | 2023 |
| TSLP175 Ltd | Extraterritorial | 2023 |
| TSLP177 Ltd | Extraterritorial | 2023 |
| TSLP178 Ltd | Extraterritorial | 2023 |
| TSLP179 Ltd | Extraterritorial | 2023 |
| TSLP181 Ltd | Extraterritorial | 2023 |
| TSLP182 Ltd | Extraterritorial | 2023 |
| TSLP183 Ltd | Extraterritorial | 2023 |
| TSLP184 Ltd | Extraterritorial | 2023 |
| TSLP185 Ltd | Extraterritorial | 2023 |
| TSLP186 Ltd | Extraterritorial | 2023 |
| TSLP188 Ltd | Extraterritorial | 2023 |
| TSLP189 Ltd | Extraterritorial | 2023 |
| TSLP190 Ltd | Extraterritorial | 2023 |
| TSLP191 Ltd | Extraterritorial | 2023 |
| TSLP192 Ltd | Extraterritorial | 2023 |
| TSLP193 Ltd | Extraterritorial | 2023 |
| TSLP194 Ltd | Extraterritorial | 2023 |
| TSLP195 Ltd | Extraterritorial | 2023 |
| TSLP196 Ltd | Extraterritorial | 2023 |
| TSLP197 Ltd | Extraterritorial | 2023 |
| TSLP198 Ltd | Extraterritorial | 2023 |
| TSLP200 Ltd | Extraterritorial | 2023 |
| TSLP201 Ltd | Extraterritorial | 2023 |
| TSLP202 Ltd | Extraterritorial | 2023 |
| TSLP203 Ltd | Extraterritorial | 2023 |
| TSLP204 Ltd | Extraterritorial | 2023 |
| TSLP205 Ltd | Extraterritorial | 2023 |
| TSLP206 Ltd | Extraterritorial | 2023 |
| TSLP207 Ltd | Extraterritorial | 2023 |
| TSLP208 Ltd | Extraterritorial | 2023 |
| TSLP209 Ltd | Extraterritorial | 2023 |
| TSLP210 Ltd | Extraterritorial | 2023 |
| TSLP211 Ltd | Extraterritorial | 2023 |
| TSLP213 Ltd | Extraterritorial | 2023 |
| TSLP214 Ltd | Extraterritorial | 2023 |
| TSLP215 Ltd | Extraterritorial | 2023 |
| TSM Logistics Limited | Transport & logistics | 2026 |
| Tsri Associates Ltd | Wholesale & retail | 2023 |
| TSS Construction Ltd | Construction | 2021 |
| Tsundoku Club Limited | Wholesale & retail | 2026 |
| TT Drinks Limited | Wholesale & retail | 2025 |
| TT Recruits & Consultants Ltd | Administrative & support | 2024 |
| TTM Exports Ltd | Wholesale & retail | 2024 |
| Tubys Events Ltd | Arts & recreation | 2025 |
| Tuck Inn Cafe U.K. Limited | Hospitality | 2018 |
| Tudor Holdings South Yorkshire Limited | Professional & scientific | 2015 |
| Tudor House Flooring and Furnishers Limited | Other services | 2020 |
| Tudorache Automotive Limited | Wholesale & retail | 2020 |
| Tudorestate Lettings and Sales Limited | Real estate | 2025 |
| Tudorharp Limited | Construction | 1992 |
| Tudworth Enterprises Limited | Real estate | 2024 |
| Tuesday Wear Ltd | Wholesale & retail | 2023 |
| Tuff-Trax Ltd | Transport & logistics | 2020 |
| Tumarx Ltd | Real estate | 2018 |
| Tumy Nails Ltd | Other services | 2025 |
| Tundra Housing Ltd | Real estate | 2021 |
| Tura Nova Ltd | Education | 2025 |
| Turanya PVT Ltd | Hospitality | 2021 |
| Turbine Marketing Holdings Limited | Energy | 2021 |
| Turbine Marketing Limited | Construction | 2013 |
| Turbine Marketing Projects Limited | Energy | 2021 |
| Turbine Marketing SPV Limited | Energy | 2018 |
| Turbine Tech Solutions Ltd | Professional & scientific | 2023 |
| Turbo TOW Team Ltd | Wholesale & retail | 2025 |
| Turbonet Properties Ltd | Real estate | 2025 |
| Turguaz Chef Ltd | Hospitality | 2021 |
| Turimar Holding Ltd | Financial services | 2019 |
| Turkhud & Co Limited | Professional & scientific | 2013 |
| Turley Construction Limited | Construction | 2012 |
| Turner Accounting Ltd | Professional & scientific | 2019 |
| Turner Accounting Solutions Limited | Professional & scientific | 2014 |
| Turner and Friends Limited | Professional & scientific | 2023 |
| Turnkey Commercial Cleaning Ltd | Administrative & support | 2021 |
| Turnrite Limited | Professional & scientific | 2022 |
| Turnstone Solutions Limited | Information & communication | 2012 |
| TURQUOISE22 Ltd | Professional & scientific | 2025 |
| Turtledove Healthcare Limited | Administrative & support | 2013 |
| TURTLES46 Limited | Transport & logistics | 2023 |
| Tutill Invest Ltd | Real estate | 2025 |
| Tutill Plant Hire Ltd | Administrative & support | 2023 |
| TW + PT Moss Ltd. | Agriculture & fishing | 2003 |
| TW Lifestyle Limited | Administrative & support | 2024 |
| TW Lifestyle Management Ltd | Real estate | 2014 |
| TWD Audio Limited | Information & communication | 2023 |