| Tunachem Ltd | Wholesale & retail | 2023 |
| Turners (Soham) Limited | Transport & logistics | 1947 |
| Turnkey East Anglia Limited | Real estate | 2006 |
| Twin Clean Home Services Limited | Other services | 2007 |
| Twin Dots Limited | Information & communication | 2006 |
| Two Swords Ltd | Professional & scientific | 2019 |
| Tyneside Innovations UK Limited | Information & communication | 2018 |
| Typecite Limited | Education | 2020 |
| UK Aimu International Biological Group Co., Ltd | Extraterritorial | 2016 |
| UK Boiler Care Ltd | Construction | 2007 |
| UK Eason International Dress Company Limited | Extraterritorial | 2015 |
| UK Eiffel Baby Appliance Limited | Extraterritorial | 2012 |
| UK Prime Shortlets Ltd | Hospitality | 2026 |
| Ukcoa Ltd. | Information & communication | 2019 |
| UKI (Sudbury) Limited | Construction | 2004 |
| Ultra-Precision Products Limited | Manufacturing | 1961 |
| Ultrabrit UK Limited | Administrative & support | 2022 |
| Ulubat Limited | Wholesale & retail | 2023 |
| Umilele Services Limited | Transport & logistics | 2024 |
| Unbounded Software Ltd | Information & communication | 2024 |
| Uni-Sine Ltd | Information & communication | 2023 |
| Unidrive Limited | Real estate | 2002 |
| United Car Breakers Ltd | Water & waste | 2018 |
| Unity Place LLP | | 2024 |
| Universal School of Eclectic Analysis, Legal Research & Law Studies Limited | Information & communication | 2023 |
| Unlock Your Awesome Ltd. | Education | 2023 |
| UNO Bayit Limited | Real estate | 2022 |
| Upline Technology Limited | Information & communication | 2006 |
| Usha Investments Limited | Financial services | 2023 |
| Ustra Limited | Wholesale & retail | 2025 |
| Utility Network Services Limited | Construction | 2002 |
| UTM Limited | Manufacturing | 2000 |
| V4C Global Limited | Wholesale & retail | 2022 |
| VA Avanti Ltd | Real estate | 2017 |
| Valentine Properties (East Anglia) Limited | Real estate | 2004 |
| Valpha Ltd | Information & communication | 2026 |
| Van Dijk Limited | Professional & scientific | 2008 |
| Varanus Limited | Professional & scientific | 2008 |
| VAS Auto Services Limited | Wholesale & retail | 2002 |
| Veda Press Limited | Manufacturing | 2008 |
| Venture East Consulting Ltd | Professional & scientific | 2004 |
| Vesto Ltd | Wholesale & retail | 2003 |
| VGA Elites Properties Ltd | Real estate | 2024 |
| Vibx Group Limited | Wholesale & retail | 2024 |
| Victoria Haulage Limited | Transport & logistics | 2003 |
| Victoria House Management Company (Felixstowe) Limited | Households | 2001 |
| Victus Limited | Professional & scientific | 2003 |
| Viga Soft (UK) Ltd | Information & communication | 2018 |
| Viking Optical Limited | Wholesale & retail | 1985 |
| Vincent Computers Limited | Professional & scientific | 1982 |
| Vincitore Properties UK Limited | Real estate | 2022 |
| Vincitore Properties UK Solutions Limited | Construction | 2023 |
| Virelix Consulting Limited | Professional & scientific | 2025 |
| Virtual FD Solutions Limited | Professional & scientific | 2017 |
| Virtual Rize Limited | Information & communication | 2020 |
| Virtual Supreme Limited | Information & communication | 2016 |
| Viscount Property Management Limited | Households | 1994 |
| Visionary Code Ltd | Information & communication | 2025 |
| Vlure Music Ltd | Information & communication | 2022 |
| Vmdh Media Ltd | Professional & scientific | 2018 |
| VSK Associates Ltd | Administrative & support | 2017 |
| Vulcan Batteries Limited | Wholesale & retail | 2003 |
| Vwin Limited | Wholesale & retail | 2009 |
| VYR Ltd | Wholesale & retail | 2024 |
| W E C Accountancy Services Limited | Professional & scientific | 2003 |
| W.B.Leach(Holdings)Limited | Agriculture & fishing | 1968 |
| W.D. COE Limited | Wholesale & retail | 1960 |
| W.E. Instrumentation Limited | Professional & scientific | 1995 |
| W.F.F. Ltd | Extraterritorial | 2016 |
| W.G. Gosling & Sons (Precision Engineers) Limited | Professional & scientific | 1968 |
| W.H.Stacey & SON Limited | Wholesale & retail | 1949 |
| W.R.E. Associates Limited | Information & communication | 1996 |
| Wallace Driving Academy Limited | Other services | 2007 |
| Walleteq Ltd | Information & communication | 2022 |
| Walnes Limited | Wholesale & retail | 2008 |
| Walters Trading Company Limited | Wholesale & retail | 2005 |
| Wangford Service Station Limited | Wholesale & retail | 2004 |
| Wardock Ltd | Real estate | 2023 |
| Warners Wine Bar | | 2002 |
| Watson & Hillhouse Limited | Construction | 1972 |
| Wavebloomlamps Ltd | Wholesale & retail | 2025 |
| Waveglowco Ltd | Wholesale & retail | 2025 |
| Waveney Developments Limited | Wholesale & retail | 1983 |
| Waveney Property Services Limited | Real estate | 2005 |
| Waveney Rush Limited | Manufacturing | 1964 |
| Waveney Truck Parts Limited | Wholesale & retail | 1985 |
| Waza Technologies Limited | Information & communication | 2024 |
| WBC Trading Ltd | Wholesale & retail | 2023 |
| WE ARE Ekobi Ltd | Manufacturing | 2022 |
| Weatherhead Pipelines Solutions Limited | Construction | 2022 |
| Webb & SON (Properties) Limited | Real estate | 1990 |
| Webster & Soanes Limited | Construction | 2001 |
| Wedjat Limited | Extraterritorial | 2002 |
| Welhams Pre-Loved Furniture & House Clearances Limited | Wholesale & retail | 2025 |
| Well Clean Technology Limited | Wholesale & retail | 2006 |
| Wenstar Enterprises Limited | Professional & scientific | 2011 |
| Wentworth Hotel Limited | Hospitality | 1947 |
| Western Link Limited | Wholesale & retail | 2018 |
| Westrock Cctv Solutions Limited | Manufacturing | 2002 |
| Whale True Labs Ltd | Information & communication | 2025 |