| TTL Consulting Limited | Administrative & support | 2025 |
| Ttocs Pest Control Ltd | Administrative & support | 2024 |
| TTS Saftey Ltd | Public administration | 2025 |
| Tuatara Scientific Ltd | Professional & scientific | 2025 |
| Tubs N Taps Limited | Wholesale & retail | 2019 |
| TUBS2U Limited | Energy | 2014 |
| Tuck Civil Services Ltd | Administrative & support | 2023 |
| Tucka Limited | Hospitality | 2026 |
| Tudor Drylining Ltd | Construction | 2020 |
| Tudor Medical Provision Ltd | Administrative & support | 2016 |
| Tudor Mobility Ltd | Other services | 2013 |
| Tudor Seafoods Ltd | Wholesale & retail | 2009 |
| Tufton Limited | Administrative & support | 2025 |
| Tuition Pro Limited | Administrative & support | 2021 |
| Tuition Pro LP | | 2025 |
| Tulan IT Limited | Information & communication | 2013 |
| Tuncay Catering Limited | Hospitality | 2018 |
| Tunnel END Properties Limited | Real estate | 2024 |
| Tunnel Survey Engineering Ltd | Administrative & support | 2007 |
| Tupling (Holdings) Limited | Professional & scientific | 2018 |
| Turbo Air Ltd | Manufacturing | 2016 |
| Turbo Tyres Warrington Ltd | Wholesale & retail | 2025 |
| Turboprop Leasing LLP | | 2003 |
| Turbozentrum UK Ltd | Wholesale & retail | 2017 |
| Turfstoreuk Limited | Wholesale & retail | 2025 |
| Turgoose Advisers and Partners Limited | Professional & scientific | 2022 |
| Turkish Kebab Pizza Ltd | Hospitality | 2026 |
| Turkish Mersey Food Limited | Hospitality | 2025 |
| Turner Family Holdings Limited | Construction | 2015 |
| Turner Living Limited | Households | 2025 |
| Turner Property & Holdings Limited | Construction | 2015 |
| Turners Fish & Chips Limited | Hospitality | 2011 |
| Turnkey Payment Solutions Limited | Other services | 2018 |
| Turnsteads Limited | Administrative & support | 2013 |
| Turnstyle Menswear Limited | Wholesale & retail | 1996 |
| Tuscar Utilities and Civil Engineering Ltd | Construction | 2013 |
| Tush Property Ltd | Real estate | 2024 |
| TUT Holdings Limited | Professional & scientific | 2025 |
| Tutor Adviser Ltd | Education | 2015 |
| Tutorright Limited | Education | 2016 |
| Tuzz Technology Limited | Information & communication | 2015 |
| Tvet Consulting Limited | Administrative & support | 2024 |
| TVR Infotech Ltd | Professional & scientific | 2020 |
| TVS Analysis Ltd | Professional & scientific | 2004 |
| TW Property Limited | Real estate | 2020 |
| TW Search & Consulting Ltd | Administrative & support | 2026 |
| Twakorsix Ltd | Information & communication | 2019 |
| TWC1 Services Ltd | Administrative & support | 2025 |
| Tweedpride Limited | Administrative & support | 1996 |
| Twenty Four Seven Euro Security Limited | Extraterritorial | 2011 |
| Twenty Nineteen Limited | Administrative & support | 2019 |
| Twenty One York Limited | Professional & scientific | 2020 |
| Twenty Seven Commercial Ltd | Real estate | 2025 |
| Twenty Seven Residential Ltd | Real estate | 2025 |
| Twentyfourseven Design and Print Limited | Manufacturing | 2003 |
| Twiglettings Ltd | Real estate | 2025 |
| Twilight Couriers Limited | Transport & logistics | 2015 |
| Twilight Distributions Limited | Transport & logistics | 1998 |
| Twin Digital Limited | Information & communication | 2022 |
| Twin Revolution Ltd | Wholesale & retail | 2023 |
| Twin Towers Limited | Construction | 2024 |
| Twinklehive Littlewear Ltd | Wholesale & retail | 2025 |
| Twinwall Fixings (UK) Limited | Professional & scientific | 2009 |
| Twixonia Ltd | Transport & logistics | 2026 |
| TWJ Civils Ltd | Professional & scientific | 2025 |
| TWM Engineering Solutions Ltd | Professional & scientific | 2021 |
| Two Brother Barber Howson Road Ltd | Other services | 2025 |
| Two Brothers Barber Warrington Ltd | Other services | 2021 |
| Two Dead Crows Limited | Information & communication | 2014 |
| Two Four Secure Limited | Information & communication | 2024 |
| Two Quick Feet Ltd | Real estate | 2017 |
| Two Way Digital Limited | Information & communication | 2013 |
| Two's Company Training Limited | Professional & scientific | 2006 |
| TWR Projects Limited | Administrative & support | 2015 |
| Twrtuning Ltd | Professional & scientific | 2020 |
| TWS Solutions Ltd | Administrative & support | 2023 |
| TX Holdings Limited | Financial services | 2023 |
| Tycoone Construction Ltd | Administrative & support | 2023 |
| TYD Global Ltd | Transport & logistics | 2024 |
| Tyers Management Services Limited | Professional & scientific | 2013 |
| Tyers Project Management Limited | Administrative & support | 2016 |
| Tylda Limited | Hospitality | 2018 |
| Tyler International Limited | Wholesale & retail | 2023 |
| Tyler Warehouse Limited | Wholesale & retail | 2026 |
| Tynan Developments Limited | Construction | 2021 |
| TYR Management Ltd | Real estate | 2022 |
| Tyre Bay Warrington Ltd | Wholesale & retail | 2024 |
| Tyre MAQ Masters Warrington Ltd | Wholesale & retail | 2025 |
| Tyres R US (Warrington) Limited | Administrative & support | 2019 |
| Tyretag Ltd | Information & communication | 2026 |
| Tyrone Holmes Property Services Limited | Construction | 2006 |
| Tyrrell Aero Engineering Limited | Administrative & support | 2012 |
| Tyrrell IT Limited | Information & communication | 2023 |
| Tyvogue Limited | Professional & scientific | 2017 |
| TZ Events Ltd | Hospitality | 2024 |
| U Drive Driver Training Ltd | Education | 2021 |
| U Drive Instructor Training Limited | Education | 2024 |
| U&I Care Limited | Health & social care | 2010 |
| U&I Group Holdings Limited | Financial services | 2026 |
| Ubervia Limited | Administrative & support | 2016 |