| Thorne Commercial Limited | Real estate | 2018 |
| Titanium Data and Security Limited | Administrative & support | 2021 |
| TMB Creative Solutions Ltd | Professional & scientific | 2015 |
| Toulmin & Gale Limited | Manufacturing | 2018 |
| Toulmin and Gale 1735 Limited | Manufacturing | 2018 |
| TRANSMEDIA742.NET LLP | | 2024 |
| Tribus Group Limited | Professional & scientific | 2016 |
| Tristin Limited | | 1973 |
| TSL Electrical Services Limited | Construction | 2010 |
| Tuna Roll Publications Limited | Information & communication | 2012 |
| Tvsca Limited | Professional & scientific | 2025 |
| Twenty 20 Design and Build Limited | Construction | 2020 |
| TY Llandaff Care Home Limited | Health & social care | 2016 |
| UK Exotic Foods Ltd | Wholesale & retail | 2021 |
| Universal Digital Services Ltd | Information & communication | 2016 |
| Urban Inns Limited | Hospitality | 2015 |
| Vanquish Investments Limited | Financial services | 2002 |
| VB Kitchen Installations Ltd | Construction | 2015 |
| VBE International CIC | Education | 2018 |
| Veracity Accountancy Limited | Extraterritorial | 2025 |
| Veracity Accountants Limited | Professional & scientific | 2016 |
| Virtual Subsidiary Holdings Limited | Information & communication | 2020 |
| Virtual Subsidiary Limited | Information & communication | 2004 |
| Virtual Subsidiary Services Limited | Information & communication | 2020 |
| West Coast Care Limited | Health & social care | 2014 |
| West's Consulting Limited | Professional & scientific | 2014 |
| Westcott Holdings Limited | Financial services | 2002 |
| Wholecreations Limited | Wholesale & retail | 2011 |
| Wickwar & Company Limited | Manufacturing | 2018 |
| Wickwar of London Limited | Manufacturing | 2018 |
| Windsor Property Ltd | Real estate | 2020 |
| Wood JV LLP | | 2020 |
| Xm.Works Ltd | Professional & scientific | 2017 |
| Zoneek Ltd | Hospitality | 2016 |
| ZS Houses Limited | Real estate | 2024 |