| UK Frozen Food Limited | Wholesale & retail | 2003 |
| UK Hosts Limited | Administrative & support | 1992 |
| UK Lighting Services Ltd | Wholesale & retail | 2024 |
| Ultra Violet Brighton Limited | Professional & scientific | 1999 |
| Umtstech Limited | Information & communication | 2003 |
| Unbloc Drainage Engineers Limited | Water & waste | 1979 |
| Under One Roof (Southern) Limited | Construction | 2003 |
| Uni-Lanka Limited | Wholesale & retail | 1998 |
| Unicode Systems Limited | Information & communication | 1997 |
| Unicorn School Limited(The) | Education | 1970 |
| Unilet Sound & Vision Limited | Wholesale & retail | 1999 |
| Unimex Limited | Wholesale & retail | 1987 |
| Union Computer Services Limited | | 1982 |
| Unique Solicitors Ltd | Professional & scientific | 2019 |
| United Trading Inc Limited | | 1994 |
| Unity Autofactors Limited | Wholesale & retail | 1958 |
| Universal Exports Storage Ltd | Information & communication | 2004 |
| Universal Motor Traders Ltd | Wholesale & retail | 2019 |
| Unix Limited | Professional & scientific | 2025 |
| Unixzone Limited | Administrative & support | 2007 |
| Unum European Holding Company Limited | Financial services | 1990 |
| Unum Limited | Financial services | 1970 |
| Upper Hale Road Management Company Limited | Households | 1995 |
| Urban Restaurants (UK) Ltd | Hospitality | 2012 |
| Urban Skyline Interiors Limited | Construction | 2014 |
| Urbanlight Limited | | 1981 |
| Urja Consultancy Limited | Professional & scientific | 2007 |
| Uro-Medics Limited | Health & social care | 2001 |
| Uroserv Limited | Professional & scientific | 2023 |
| Ushers Estate Agents Ltd | Extraterritorial | 2006 |
| Utopia Transport Limited | Transport & logistics | 2006 |
| Uttara Consulting Limited | Information & communication | 1995 |
| V a Phillips Removals & Deliveries Limited | Administrative & support | 2008 |
| V and V Estates Ltd | Real estate | 2011 |
| V Ellis Communications Limited | Administrative & support | 2006 |
| V Krishna Groceries Ltd | Wholesale & retail | 2025 |
| V.B Training Consultants Limited | Education | 2003 |
| V.K. Transport Limited | Transport & logistics | 2003 |
| V.S.M. Limited | Wholesale & retail | 1988 |
| V5 Motors Ltd | Wholesale & retail | 2023 |
| Vaal Consulting Limited | Professional & scientific | 2004 |
| Vabs Limited | Financial services | 2005 |
| Vacheril Limited | Health & social care | 2015 |
| Vachida Limited | Health & social care | 2003 |
| Val-U-Frame (Southern) Limited | | 1977 |
| VALDE730 Limited | Transport & logistics | 2014 |
| Vale Furnishers Ltd | Wholesale & retail | 1986 |
| Valeglen Limited | Real estate | 2001 |
| Valkyrie Film Ltd | Information & communication | 2022 |
| Vallalar Consultancy Limited | Information & communication | 2024 |
| Valore Advisory Limited | Professional & scientific | 2026 |
| Valtam Global Limited | Information & communication | 2016 |
| Vape LAB Streatham Limited | Wholesale & retail | 2023 |
| Vartech Solutions (UK) Limited | Information & communication | 2005 |
| Vayu Earth Limited | Wholesale & retail | 2023 |
| VDL Villa 87 Ltd | Households | 2014 |
| Veen Stores Limited | Wholesale & retail | 2017 |
| Vela Property's Ltd | Real estate | 2025 |
| Venhill Engineering Limited | Manufacturing | 1970 |
| Veniard Limited | Wholesale & retail | 1962 |
| Ventlip Limited | | 1979 |
| Ventoux Ventures Limited | Financial services | 2022 |
| Venture Development Consultancy Limited | Professional & scientific | 2004 |
| Ventures Inc Ltd | Information & communication | 2026 |
| Venus Hair and Cosmetics Limited | Wholesale & retail | 2005 |
| Verdant Industries Limited | Information & communication | 2007 |
| Verimark Limited | Manufacturing | 2006 |
| Verma Property Ltd | Real estate | 2010 |
| Vermop UK Limited | Wholesale & retail | 2007 |
| Vero Construction Ltd | Construction | 2016 |
| Versatile Builders Limited | Construction | 2008 |
| Versatile Ceramics Limited | Construction | 2002 |
| Verve Interactive Limited | Administrative & support | 1996 |
| Vessels of Treasure Fellowship | Other services | 2023 |
| Vesta Structures Ltd | Professional & scientific | 2022 |
| VH Investment Holdings Ltd | Real estate | 2025 |
| VH IT Solutions Ltd | Administrative & support | 2016 |
| Vicom Property Consultants Limited | Professional & scientific | 2000 |
| Victoria Place Education Ltd | Education | 2009 |
| Victory Industries (Surrey) Limited | | 1945 |
| Video 2001 Limited | | 1982 |
| Vidhya Infotech Ltd | Information & communication | 2022 |
| View Gallery Limited | Wholesale & retail | 1988 |
| Viewprize Ltd | Real estate | 2001 |
| Village Ceramics Limited | Wholesale & retail | 2005 |
| Village Investigations Limited | Information & communication | 1988 |
| Villas Brazil Group Limited | Financial services | 2024 |
| Vinbricks Ltd | Real estate | 2024 |
| Vineclose Limited | Real estate | 1972 |
| Vinedale Limited | Real estate | 2001 |
| Vinetree Consulting Limited | Professional & scientific | 2003 |
| Vinis Enterprises Ltd | Real estate | 2005 |
| Vintage & Classic Shock Absorbers Limited | Wholesale & retail | 1990 |
| Viper Events Ltd | Manufacturing | 2018 |
| Virach Consulting Ltd | Information & communication | 2012 |
| Virajitha Ltd | Transport & logistics | 2025 |
| Virash Bach & Co. Limited | Professional & scientific | 2004 |
| Viribus Group Holdings Ltd | Financial services | 2018 |
| Viroshan Company Ltd | Wholesale & retail | 2024 |
| Virtual Computer Technologies Limited | Information & communication | 2007 |