| Turner Dental LAB Limited | Health & social care | 2011 |
| Turner Waste Management Ltd | Transport & logistics | 2021 |
| Turtle Health Ltd | Wholesale & retail | 2021 |
| Turtur Construction Ltd | Construction | 2018 |
| Turvilleweb Ltd | Information & communication | 2024 |
| Tuscan Wealth Management Ltd | Professional & scientific | 2020 |
| Tusk Fitness Ltd | Arts & recreation | 2018 |
| Tutla's DIY & Hardware Ltd | Wholesale & retail | 2014 |
| Tutor Meets Tutee Ltd | Education | 2025 |
| Tutorcentral Ltd | Education | 2014 |
| Tutti Rouge Ltd | Professional & scientific | 2012 |
| TUX Futures Limited | Financial services | 2014 |
| TUZ Ltd | Hospitality | 2024 |
| Tve(Uk) Ltd | Wholesale & retail | 2019 |
| TVF Contracting Ltd | Financial services | 2013 |
| TVH Properties Limited | Real estate | 2023 |
| TVL Enterprise Ltd | Professional & scientific | 2023 |
| TVL1 Ltd | Wholesale & retail | 2023 |
| TVL2 Ltd | Wholesale & retail | 2023 |
| TVL3 Ltd | Wholesale & retail | 2023 |
| TVM Medicare Private Limited | Health & social care | 2025 |
| TVN Entertainment Ltd | Administrative & support | 2016 |
| TVP International Limited | Wholesale & retail | 2020 |
| TVS Auto Limited | Wholesale & retail | 2019 |
| TVS Automotive Ltd | Wholesale & retail | 2015 |
| TVS Investments Ltd | Real estate | 2020 |
| TW Window Systems Ltd | Manufacturing | 2018 |
| TWD Traffic Ltd | Transport & logistics | 2021 |
| Twee Homes Limited | Real estate | 2025 |
| Twelve 15 Projects Ltd. | Professional & scientific | 2014 |
| Twelve Silver Trees Ltd | Wholesale & retail | 2021 |
| Twenty Eight Ventures Ltd | Information & communication | 2013 |
| Twenty Four (Siga) Ltd | Financial services | 2025 |
| Twenty Four Twenty Limited | Hospitality | 2025 |
| Twenty SIX Enterprises Ltd | Real estate | 2022 |
| Twenty the Parade Ltd | Wholesale & retail | 2019 |
| Twenty-Nine London Ltd | Professional & scientific | 2015 |
| TWENTY3 Rentals Limited | Real estate | 2025 |
| TWENTY4S Marketing Limited Limited | Wholesale & retail | 2025 |
| TWENTY8 Creative Ltd | Professional & scientific | 2024 |
| TWENTY9 Stores Limited | Manufacturing | 2015 |
| Twigcrest Limited | Wholesale & retail | 1990 |
| Twigs & Grass Ltd | Hospitality | 2018 |
| Twin H Supplies Ltd | Wholesale & retail | 2025 |
| Twin Needle Ltd | Manufacturing | 2026 |
| Twin Nurture Ltd | Administrative & support | 2024 |
| Twincrest Properties Ltd | Real estate | 2026 |
| Twingear Holdings Limited | Manufacturing | 2016 |
| Twinkle Tots Boutique Ltd | Wholesale & retail | 2026 |
| Twins Home Improvements Limited | Construction | 2003 |
| Twins Products Ltd | Administrative & support | 2021 |
| Twistcode UK Limited | Manufacturing | 2023 |
| Twisted Potatoes Ltd | Hospitality | 2024 |
| Twister F & B Limited | Wholesale & retail | 2019 |
| TWM Limited | Financial services | 2010 |
| Two Fold Ventures Ltd | Financial services | 2025 |
| Two J S Office Services Limited | Professional & scientific | 2010 |
| Two Property Consultants Limited | Real estate | 2008 |
| Two Seven One Ltd | Professional & scientific | 2025 |
| Two Sisters Investments Ltd | Real estate | 2024 |
| Two Step Holding Limited | Information & communication | 2024 |
| Two Together Services Ltd | Professional & scientific | 2014 |
| Two Trainer Trades Ltd | Wholesale & retail | 2026 |
| Two Two One Investments Ltd | Real estate | 2023 |
| Twoeight Investments Ltd | Real estate | 2016 |
| Twoninetwo Holdings Limited | Financial services | 2025 |
| Twoninetwo Limited | Information & communication | 2025 |
| Twoticks Investment Ltd | Real estate | 2024 |
| TWR Resources Limited | Administrative & support | 2023 |
| Twynwear Ltd | Manufacturing | 2025 |
| Tyagi Investments Ltd | Real estate | 2025 |
| Tyche Logistics Ltd | Transport & logistics | 2017 |
| Tychicus Connect Limited | Manufacturing | 2016 |
| Tyke London Limited | Real estate | 2014 |
| Tyler Deco Limited | Construction | 2013 |
| Tyler's Garden Maintenance Ltd | Administrative & support | 2025 |
| Tymbark Leicester Ltd | Wholesale & retail | 2025 |
| Tynatex Limited | Wholesale & retail | 2012 |
| Tyneside MOT Ltd | Wholesale & retail | 2025 |
| Typecast Engineering Limited | Manufacturing | 1998 |
| Typedef Limited | Information & communication | 2019 |
| Typesafe Labs Limited | Information & communication | 2017 |
| Tyre Express Fit Ltd | Manufacturing | 2026 |
| Tyre Express Leicester Ltd | Wholesale & retail | 2024 |
| Tyre Hub (Leic) Limited | Wholesale & retail | 2024 |
| Tyre Nest Leicester Ltd | Wholesale & retail | 2025 |
| Tyre Nest Ltd | Wholesale & retail | 2024 |
| Tyre Shak Ltd | Wholesale & retail | 2023 |
| Tyre Trader Ltd | Wholesale & retail | 2021 |
| Tyres FIX Ltd | Wholesale & retail | 2024 |
| Tyres Galore (MH) Limited | Wholesale & retail | 2011 |
| Tyres Galore Holdings Limited | Wholesale & retail | 2022 |
| Tyres Galore Limited | Wholesale & retail | 1995 |
| Tyres Service Limited | Wholesale & retail | 2021 |
| Tyresouls Leics Ltd | Wholesale & retail | 2025 |
| Tyresync Ltd | Wholesale & retail | 2025 |
| Tzak Trans Ltd | Transport & logistics | 2015 |
| TZG Trans Ltd | Transport & logistics | 2023 |
| U & M Logistics Ltd | Wholesale & retail | 2020 |
| U & S Services Ltd | Professional & scientific | 2019 |