| Tilley Plumbing & Heating Limited | Construction | 2016 |
| Tishay Investments Ltd | Real estate | 2021 |
| Tishay Toni Limited | Manufacturing | 2012 |
| TJM Commerce Group Limited | Wholesale & retail | 2024 |
| TJM Properties Ltd | Real estate | 2017 |
| TLC Support Limited | Other services | 2019 |
| Tma-Medical Equipment Ltd | Manufacturing | 2016 |
| TNM Care Holdings Limited | Financial services | 2026 |
| TNM Care Limited | Financial services | 2023 |
| Tobin Property Management Ltd | Real estate | 2017 |
| Tochi Ltd | Health & social care | 2014 |
| TOM B Electrical Contractor Ltd | Construction | 2013 |
| Tomas Bespoke Woodwork Ltd | Construction | 2025 |
| Top Flooring Limited | Construction | 2014 |
| TOP2TOE Property Services Limited | Administrative & support | 2020 |
| Toro Developments Ltd | Construction | 2024 |
| Touch of Class (London) Ltd | Construction | 2018 |
| Touch of Class Services Limited | Administrative & support | 2016 |
| TP Vets Limited | Professional & scientific | 2021 |
| Trade in Copiers Limited | Wholesale & retail | 2010 |
| Tradeset Limited | Manufacturing | 1957 |
| Trading Empire Ltd | Wholesale & retail | 2024 |
| Travel Glam Limited | Wholesale & retail | 2025 |
| Treasure Assets Summers ROW Limited | Real estate | 2016 |
| Triangle Healthcare (Holdings) Limited | Administrative & support | 2022 |
| Trident Motor Services Ltd | Wholesale & retail | 2015 |
| Trinco Limited | Wholesale & retail | 2018 |
| Trinco Star Limited | Real estate | 2026 |
| Triple Key Properties Ltd | Real estate | 2025 |
| True Companion Care Limited | Health & social care | 2025 |
| Ttreasuries Ltd | Financial services | 2026 |
| TTW Services Ltd | Professional & scientific | 2025 |
| TV Studio Consulting Ltd | Information & communication | 2014 |
| Twenty SIX Club Ltd | Wholesale & retail | 2026 |
| Tyre Traction Ltd | Wholesale & retail | 2026 |
| U C MAS (UK) Ltd | Education | 2004 |
| U4 Group Ltd | Financial services | 2026 |
| UK Fujian Association Ltd | Other services | 2019 |
| UK Heating Engineers Ltd | Professional & scientific | 2011 |
| Ukrainian League Ltd | Arts & recreation | 2025 |
| Ukre Ltd | Real estate | 2018 |
| Ulti Mutt Dog Groomers Limited | Other services | 2019 |
| Unadkat Investments 1 Limited | Real estate | 2010 |
| Unadkat Propco Ltd | Real estate | 2021 |
| Unara Ltd | Hospitality | 2025 |
| Unishaw Limited | Real estate | 2011 |
| Unit Trade Ltd | Construction | 2009 |
| Unitednet Ltd | Information & communication | 2015 |
| Universaljay Co. Ltd | Health & social care | 2023 |
| Upvision Limited | Wholesale & retail | 2025 |
| URI Construction Limited | Construction | 2018 |
| V S Financial Consultant Ltd | Financial services | 2021 |
| V&K Sons Builders Limited | Construction | 2026 |
| V&M Construction Group Ltd | Construction | 2018 |
| V&V Team Ltd | Transport & logistics | 2015 |
| V&Z Construction Ltd | Construction | 2024 |
| V3 Mpch UK Limited | Hospitality | 2024 |
| V8 Venture Partners Limited | Other services | 2022 |
| Vaha Ltd | Information & communication | 2016 |
| Valentin Haulage Trans Limited | Transport & logistics | 2025 |
| Vali & Gigi Ltd | Transport & logistics | 2019 |
| VALID8.COM Ltd | Information & communication | 2025 |
| Valley Drive Partnership LLP | | 2023 |
| Varna Property Company Limited | Extraterritorial | 1960 |
| VAS Electric Ltd | Construction | 2026 |
| VB Refurbishments Ltd | Construction | 2019 |
| VDK Properties Ltd | Real estate | 2018 |
| Veev Consulting Ltd | Professional & scientific | 2025 |
| Velfor Consulting Limited | Information & communication | 2026 |
| Velvraze Ltd | Manufacturing | 2025 |
| Verinonexus Ltd | Wholesale & retail | 2026 |
| Vertico Properties Ltd | Real estate | 2020 |
| Verve (Bushey) Limited | Households | 2013 |
| Vian Properties Limited | Construction | 2024 |
| Vicki Bahra Ltd | Arts & recreation | 2021 |
| Vicol Drylining Ltd | Construction | 2026 |
| Victory Courier Services Ltd | Transport & logistics | 2008 |
| Vidartha Diagnostics Limited | Health & social care | 2013 |
| Vidash Hair and Beauty Limited | Other services | 2024 |
| Vidya Care Solutions Limited | Health & social care | 2014 |
| Viessmann Comercial Engineer Ltd | Construction | 2022 |
| Viewpro Limited | Professional & scientific | 2020 |
| Vip’S of London Ltd | Health & social care | 2026 |
| Viridian Information Technology Limited | Administrative & support | 2011 |
| Vision Motorcycle Training | | 1996 |
| Vision Private Ltd | Wholesale & retail | 2025 |
| Vision Short Lets Management Ltd | Real estate | 2017 |
| Vitalcarepro Ltd | Administrative & support | 2024 |
| Vitasyn Ltd | Hospitality | 2026 |
| VMJ Construction Company Limited | Construction | 2010 |
| Vrida Ltd | Financial services | 2024 |
| Vrisaki Kebab House Ltd | Hospitality | 2023 |
| VSD Construct Ltd | Construction | 2026 |
| VSW Ltd | Wholesale & retail | 2023 |
| Vulcan Construction Ltd | Construction | 2024 |
| Vyasa AI Ltd | Information & communication | 2025 |
| VYO Brickwork Ltd | Construction | 2025 |
| Vyoman Realtors Ltd | Real estate | 2017 |
| Waddesdon Bell Limited | Hospitality | 2008 |
| Wakefield Engineering Services Limited | Manufacturing | 1998 |