| Tessian Properties Ltd | Real estate | 2024 |
| THE Garden Room at Manor Court Ltd | Hospitality | 2018 |
| THE Port Inn Holyhead Ltd | Hospitality | 2024 |
| THE Yoga Lounge Ltd | Other services | 2018 |
| Thompson & Gregory Limited | Other services | 2012 |
| Thorpe Property Group Limited | Real estate | 2023 |
| Thrive Associates Ltd | Professional & scientific | 2017 |
| TM Electrical Services Holdings Limited | Financial services | 2025 |
| TM Electrical Services Limited | Construction | 2014 |
| Top Rank Security Services Limited | Public administration | 2010 |
| Total Reclaims Diamond Drilling Limited | Construction | 2020 |
| Total Reclaims Holdings Limited | Financial services | 2024 |
| Total Stripout Limited | Real estate | 2024 |
| Total Stripout Services Limited | Extraterritorial | 2024 |
| Tribal Clash Events Ltd | Other services | 2023 |
| Tribal Clash Ltd | Other services | 2023 |
| Trimscale Holdings Limited | Financial services | 2006 |
| Trimscale Limited | Real estate | 1982 |
| Trio Creative Limited | Professional & scientific | 2024 |
| Turn the Page Ltd | Information & communication | 2025 |
| Turton Building Control Ltd | Administrative & support | 2004 |
| Uhdn Holdings Limited | Financial services | 2021 |
| UK Garage Doors Ltd | Construction | 2013 |
| University Hospital Day Nursery Limited | Health & social care | 1989 |
| Vale Plant Hire Limited | Administrative & support | 2018 |
| Valescape Construction Ltd | Construction | 2024 |
| Valescape Developments Ltd | Construction | 2023 |
| Valescape Limited | Construction | 2017 |
| Valescape Surveying & Engineering Ltd | Construction | 2023 |
| Van Boven Holdings Limited | Financial services | 2024 |
| Vortex Depollution Limited | Wholesale & retail | 1998 |
| Water at Work Ltd | Manufacturing | 2003 |
| Wedgex Limited | Extraterritorial | 2013 |
| Weldon Homecare Services Limited | Public administration | 2021 |
| Westminster Trading & Property Group Limited | Financial services | 1990 |
| Wheatcroft Pubs Limited | Hospitality | 2023 |
| Willoughby (35) Limited | Financial services | 1994 |
| Willowbrook Partnerships Limited | Construction | 2026 |
| Wind Whistle Limited | Construction | 2015 |
| World of Mowers Limited | Extraterritorial | 1997 |
| X Group Properties Ltd | Real estate | 2024 |
| Xeinadin Midlands Limited | Professional & scientific | 2006 |
| Yes-Reedbeds Ltd | Construction | 2011 |