| UB Gasman Ltd | Health & social care | 2019 |
| Uber Card Pals Ltd | Transport & logistics | 2024 |
| Ubiqa Ltd | Real estate | 2019 |
| Ubuntu Hunhu Foundation C.I.C. | Administrative & support | 2016 |
| Uffizzi Pizzeria Ltd | Hospitality | 2023 |
| UK Assets Ltd | Real estate | 2008 |
| UK Cable Connections Ltd | Energy | 2026 |
| UK Customplates Ltd | Administrative & support | 2026 |
| UK Guangxi Chinese Limited | Arts & recreation | 2024 |
| UK Guangxi Culture Limited | Arts & recreation | 2024 |
| UK International Language Learning & Exchange Centre Ltd | Real estate | 2021 |
| UK Link Property Investment B Limited | Real estate | 2025 |
| UK Link Property Investment C Ltd | Real estate | 2025 |
| UK Maihot Global Limited | Wholesale & retail | 2024 |
| UK Northeast Investments Limited | Arts & recreation | 2011 |
| UK Pickleball Shop Limited | Other services | 2023 |
| Uk-Bridge Property Investment Ltd | Real estate | 2017 |
| Ultimate EAR Protection Limited | Manufacturing | 2003 |
| Ultimate Event Travel Ltd | Administrative & support | 2014 |
| Ultra Management Services London Ltd | Administrative & support | 2017 |
| Umbrella House Day Nursery Ltd | Education | 2014 |
| Unclesreact Ltd | Information & communication | 2024 |
| Unexpected Tales Limited | Administrative & support | 2015 |
| Unforgettable Greek Weddings Limited | Administrative & support | 2013 |
| Unify Shutters Ltd. | Construction | 2017 |
| Uniled Solutions Ltd | Administrative & support | 2010 |
| Unique Image London Ltd | Professional & scientific | 2012 |
| Unique Property Improvements Ltd | Construction | 2011 |
| Unique TT Care Support Services Limited | Administrative & support | 2026 |
| Uniquedirection Ltd | Information & communication | 2013 |
| Uniquehelp Limited | Health & social care | 1987 |
| Uniquequick Limited | Arts & recreation | 1990 |
| Uniserve Property Developements Ltd | Construction | 2025 |
| Unit Wellness and Recovery Limited | Arts & recreation | 2025 |
| United Wisdom Ltd | Professional & scientific | 2019 |
| Unity Church, Orpington | Other services | 2012 |
| Universal Consulting Ltd | Administrative & support | 2025 |
| Universal Group Construction Ltd | Construction | 2023 |
| Universal Safety Services Ltd | Public administration | 2019 |
| UP and Running (Sevenoaks) Limited | Wholesale & retail | 2011 |
| UPA Merchandise Ltd | Wholesale & retail | 2007 |
| Uplift Housing Management Limited | Real estate | 2020 |
| Uplift Property Investments Limited | Real estate | 2021 |
| Uplift Property Solutions Ltd | Real estate | 2024 |
| Upper Floco Freehold Limited | Households | 2020 |
| Upset Ltd | Construction | 2025 |
| Urban Brickwork and Scaffolding Limited | Construction | 2015 |
| Urbanitize Limited | Professional & scientific | 2025 |
| Urmet Domus U.K. Limited | Information & communication | 1998 |
| Urrismanagh Construction Limited | Professional & scientific | 2025 |
| Urubi Limited | Manufacturing | 2014 |
| US Global Tax London Limited | Professional & scientific | 2015 |
| US Global Tax Ltd | Professional & scientific | 2021 |
| US Property Assets Ltd | Construction | 2026 |
| Usmania Investment Ltd | Real estate | 2022 |
| Utility Finance Limited | Professional & scientific | 2010 |
| Utopia KOI Ltd | Wholesale & retail | 2009 |
| Utos Group Limited | Administrative & support | 2019 |
| UTU FX Ltd | Financial services | 2020 |
| V & V Family LLP | | 2016 |
| V D M Construction Ltd | Construction | 2015 |
| V&V Consultancy Services Ltd | Information & communication | 2010 |
| V&V Storer Property Ltd | Real estate | 2026 |
| V-Carbon Holdings Limited | Financial services | 2019 |
| V3 Investments Limited | Real estate | 2019 |
| Vaav Ltd | Construction | 2014 |
| Vaishali Bhagwandas Ltd | Real estate | 2023 |
| Vaishnavi Associates Limited | Professional & scientific | 2021 |
| Valav Limited | Health & social care | 2021 |
| Valentina Childcare Services Ltd | Health & social care | 2025 |
| Valeo USL Limited | Administrative & support | 2017 |
| Valerie's Ltd | Wholesale & retail | 2009 |
| Valhalla Kent Limited | Professional & scientific | 2018 |
| Valley Bridge Construction Ltd | Construction | 2024 |
| Valley Moon Consultant Ltd | Information & communication | 2013 |
| Valley Point Management Company Limited | Administrative & support | 2010 |
| Valley Tree Surgeons Limited | Administrative & support | 2002 |
| Valp Limited | Professional & scientific | 2015 |
| Vanessa Concept Ltd | Construction | 2019 |
| Vanity Beauty Brasted Limited | Other services | 2015 |
| Vanity Beauty GSG Limited | Other services | 2005 |
| Vanity South Limited | Other services | 2018 |
| Vantage Link Limited | Professional & scientific | 2012 |
| Vantage Points Consulting Ltd | Administrative & support | 2020 |
| Vantier Holdings Ltd | Financial services | 2025 |
| Vantier Invest Ltd | Real estate | 2025 |
| Vanu's Beauty World Limited | Other services | 2015 |
| Vape & Mobile UK Ltd | Wholesale & retail | 2022 |
| Vardo Films Ltd. | Information & communication | 2009 |
| Variado Services Limited | Construction | 2025 |
| Variety Basket Ltd | Other services | 2026 |
| Varoosh Sports Partnerships Limited | Professional & scientific | 2017 |
| Varun Systems Limited | Real estate | 2021 |
| Vascontractors Ltd | Construction | 2015 |
| Vaughan & Associates Limited | Professional & scientific | 2002 |
| Vault & Vine Holdings Ltd | Hospitality | 2024 |
| Vault & Vine Limited | Hospitality | 2019 |
| Vaya Digital Limited | Information & communication | 2012 |
| VB Developments Ltd | Construction | 2026 |
| VC Accounting Limited | Professional & scientific | 2019 |