| Uktiad Ltd | Real estate | 2024 |
| Ultimate Multi Services Limited | Construction | 2015 |
| Ultimate Network Solutions Limited | Agriculture & fishing | 2018 |
| Ultimate Racing Series Limited | Arts & recreation | 2024 |
| Ultra D&P Limited | Construction | 2019 |
| Ultrasound & Diagnostics Limited | Health & social care | 2024 |
| Umbrella Home International Limited | Wholesale & retail | 2023 |
| Umbrella Outdoors Limited | Wholesale & retail | 2023 |
| Umoya Events Ltd | Hospitality | 2021 |
| Umoya Legacy LLP | | 2022 |
| Umoya Properties Ltd | Real estate | 2022 |
| Unbranded UX Ltd | Information & communication | 2013 |
| Unconventional Wisdom Ltd | Financial services | 2023 |
| Underhill 1950 Limited | Extraterritorial | 2015 |
| Underhill Cars Limited | Wholesale & retail | 2012 |
| UNE Ltd | Wholesale & retail | 2021 |
| Uniform Marketing Limited | Information & communication | 2020 |
| Uniformwise Limited | Wholesale & retail | 2018 |
| Unipack Ltd | Administrative & support | 2022 |
| Unipax Limited | Manufacturing | 2021 |
| Uniq Start Ltd | Education | 2026 |
| Unique Beauty 4 YOU Limited | Other services | 2016 |
| Unique British Medical Courses Limited | Education | 2025 |
| Unique Essex Bullz Ltd | Other services | 2018 |
| Unique Kent Bullz Ltd | Other services | 2020 |
| Unique Wealth Limited | Financial services | 2013 |
| Unison Scaffolding Ltd | Construction | 2006 |
| Unit Assist Limited | Transport & logistics | 2020 |
| United Halah Meat Limited | Wholesale & retail | 2016 |
| United Investment (Lincoln) Ltd | Agriculture & fishing | 2026 |
| United Navigation Limited | Information & communication | 2007 |
| United Navigation Trustees Limited | Professional & scientific | 2018 |
| United Scaffolding Projects Ltd | Construction | 2022 |
| Unorthomoulds Limited | Wholesale & retail | 2023 |
| Unsubscribe Limited | Professional & scientific | 2022 |
| Untapped Revenue Optimization Solutions Limited | Professional & scientific | 2023 |
| Untapped Tech Solutions Ltd | Information & communication | 2024 |
| Upminster Brewery Ltd | Manufacturing | 2019 |
| Upminster Rugby Football Club | Arts & recreation | 2013 |
| Upstream Management and Trading Ltd | Administrative & support | 2023 |
| Urban Fabs Ltd | Manufacturing | 2019 |
| Urban Hive Hackney Management Limited | Real estate | 2007 |
| Urban Jack Limited | Wholesale & retail | 2019 |
| Urban Mango Media Limited | Administrative & support | 2020 |
| Urban Residential Investments Ltd | Real estate | 2022 |
| Urban Services 2015 Ltd | Water & waste | 2014 |
| Urban UK Investments Ltd | Real estate | 2016 |
| Urecruit Ltd | Administrative & support | 2001 |
| URS Venture Ltd | Hospitality | 2025 |
| Urtiz Group Ltd | Professional & scientific | 2024 |
| USB Marketing Limited | Other services | 2016 |
| Usela Ltd | Construction | 2020 |
| Utale Construction Ltd | Construction | 2016 |
| Utopia Music Associates Limited | Hospitality | 2010 |
| Utopia Promotional Clothing Limited | Wholesale & retail | 2010 |
| Uventor Ltd | Professional & scientific | 2019 |
| V&P Property Solutions Ltd | Real estate | 2020 |
| V&T Carpentry Ltd | Construction | 2018 |
| V10 GRS Ltd | Real estate | 2013 |
| VAL KAR Ltd | Transport & logistics | 2017 |
| Valbennett Ltd | Wholesale & retail | 2015 |
| Valentines Trading Ltd | Wholesale & retail | 2020 |
| Valisha (ABG) Ltd | Wholesale & retail | 2019 |
| Valisha (Abingdon) Ltd | Real estate | 2017 |
| Valisha (North Oxford) Ltd | Real estate | 2020 |
| Valisha (OXF) Ltd | Real estate | 2022 |
| Valisha (Oxford) Ltd | Real estate | 2016 |
| Valisha (Oxon) Limited | Real estate | 2018 |
| Valisha Ltd | Real estate | 2012 |
| Valoris Investment Ltd | Real estate | 2025 |
| Valtec Properties Ltd | Real estate | 2010 |
| Van Extras Limited | Wholesale & retail | 2009 |
| Vanguard Insolvency Practitioners Limited | Financial services | 2015 |
| Vanillastyle Limited | Wholesale & retail | 2021 |
| Vann Group Ltd | Construction | 2023 |
| Vanquish Recruitment UK Limited | Administrative & support | 2025 |
| Vapegen Tech Ltd | Wholesale & retail | 2023 |
| Varlon Consultancy Limited | Professional & scientific | 2023 |
| VAS Construct Ltd | Construction | 2015 |
| Vasko Installations Limited | Construction | 2017 |
| Vaughan Virtual Assistance Ltd | Administrative & support | 2025 |
| Vaux-Blake Estates Limited | Real estate | 2026 |
| Vauxhall Consulting Ltd | Professional & scientific | 2022 |
| VBX Events Ltd | Professional & scientific | 2021 |
| VC Events Ltd | Hospitality | 2019 |
| Vektora Global Ltd | Administrative & support | 2025 |
| Veliax Limited | Information & communication | 2020 |
| Velvet Icing Ltd | Manufacturing | 2024 |
| Venom Design Ltd | Wholesale & retail | 2017 |
| Ventglo Ltd | Administrative & support | 2005 |
| Ventura Consultant Limited | Real estate | 2021 |
| Ventura Secure Solutions Limited | Professional & scientific | 2024 |
| Venture Leases Limited | Real estate | 2024 |
| Venture Legal Consulting Limited | Professional & scientific | 2010 |
| Venture Properties London Limited | Real estate | 2016 |
| Venus Concept UK Limited | Wholesale & retail | 2015 |
| Venus Flytrap Limited | Professional & scientific | 1999 |
| Verapoint.Ai Ltd | Information & communication | 2026 |
| Verdant Fields Limited | Wholesale & retail | 2006 |
| Veredan Limited | Information & communication | 2024 |