| Unlimited Analytics Ltd | Information & communication | 2024 |
| Unlock Homes Limited | Real estate | 2021 |
| Unreal Renovations Ltd | Construction | 2025 |
| Untangle Your Life Limited | Administrative & support | 2012 |
| UP Life Ltd | Extraterritorial | 2024 |
| UP Rugby Ltd | Education | 2024 |
| UP Sports Ltd | Education | 2024 |
| UP2ER Limited | Health & social care | 2009 |
| Uplived Property Limited | Construction | 2020 |
| Upminster Accountants Limited | Extraterritorial | 2019 |
| Upminster Distribution Limited | Transport & logistics | 1999 |
| Upminster Storage Ltd | Transport & logistics | 2019 |
| Uptown Pros Ltd | Real estate | 2025 |
| UR Office Limited | Administrative & support | 2021 |
| Uraswamys Ltd | Hospitality | 2019 |
| Urban Ethos UK Ltd | Wholesale & retail | 2025 |
| Urban MUD Events Ltd | Arts & recreation | 2013 |
| Urban Path Ventures Ltd | Wholesale & retail | 2025 |
| Urbs Limited | Information & communication | 2025 |
| URP Essex Ltd | Arts & recreation | 2023 |
| Ursache Ltd | Construction | 2022 |
| Usha LAD Consultants Ltd | Extraterritorial | 2019 |
| Utopia Aesthetics Limited | Other services | 2014 |
| Utopia Cleaning Services Ltd | Administrative & support | 2022 |
| Utopia Limited | Administrative & support | 1982 |
| Uulu Joinery Ltd | Construction | 2024 |
| V & S Brothers Ltd | Construction | 2012 |
| V D Engineering Limited | Professional & scientific | 2015 |
| V E Fire Safety Consultants Limited | Other services | 2007 |
| V I Racovita Ltd | Construction | 2018 |
| V J Milman Tippers Ltd | Mining & quarrying | 2025 |
| V-Bar (Hornchurch) Limited | Hospitality | 2024 |
| V4G Workwear Limited | Wholesale & retail | 2011 |
| VA Synergy Ltd | Construction | 2026 |
| Vadi Catering Ltd | Hospitality | 2025 |
| VAF Ltd | Construction | 2015 |
| Vaidas Setting OUT Services Limited | Construction | 2008 |
| Vakaris Ltd | Transport & logistics | 2019 |
| VAL Services (London) Limited | Construction | 2026 |
| Valant Electrical Ltd | Construction | 2026 |
| Valcrest Limited | Financial services | 2026 |
| Valels Ltd | Wholesale & retail | 2024 |
| Valemore Consulting Limited | Information & communication | 1998 |
| Valia Consultancy Limited | Professional & scientific | 2014 |
| Valia Property Ltd | Real estate | 2023 |
| Vallnor Alliance Ltd | Real estate | 2024 |
| Valter K Construction Limited | Construction | 2016 |
| Value Stream Consulting Limited | Information & communication | 2024 |
| Valvis Ltd | Hospitality | 2026 |
| Valward Ltd | Administrative & support | 2018 |
| Van - Dixon Electrical Limited | Construction | 1993 |
| Van Axel Limited | Wholesale & retail | 2025 |
| Vando Build Ltd | Construction | 2013 |
| Vandy Investments Limited | Health & social care | 2013 |
| Vanforu Ltd | Transport & logistics | 2015 |
| Vanity Clinique Ltd | Public administration | 2023 |
| Vans 4 Trade Ltd | Wholesale & retail | 2020 |
| Vapes & Mobile Accessories Ltd | Wholesale & retail | 2022 |
| Varams Trading Limited | Wholesale & retail | 2015 |
| Vasca Lifting Ltd | Construction | 2018 |
| Vaseltarman Limited | Health & social care | 2014 |
| Vaultin Ltd | Professional & scientific | 2025 |
| Vectordx Global Limited | Health & social care | 2026 |
| Vedanta Vidyaa Ltd | Other services | 2014 |
| VEE Lickey Catering & Rental Services Limited | Hospitality | 2024 |
| Veecare Homes Ltd. | Real estate | 2006 |
| Veggie Junction Limited | Wholesale & retail | 2025 |
| Vehicle Charging Solutions Limited | Construction | 2021 |
| Vejen Fintech Solutions Limited | Information & communication | 2025 |
| Vendr Vault Ltd | Wholesale & retail | 2023 |
| Vent Craft Ltd | Construction | 2023 |
| Ventilation and Firedamper Services Ltd | Construction | 2026 |
| Ventorix Ltd | Wholesale & retail | 2026 |
| Venus Recycling Limited | Water & waste | 2011 |
| Venus Supermarket Limited | Wholesale & retail | 2025 |
| VER Rigging Limited | Construction | 2019 |
| Verdant Works Limited | Education | 2024 |
| Vere Limited | Real estate | 2017 |
| Verger Enterprises Ltd | Hospitality | 2025 |
| Veridian Driver Training Services Ltd | Education | 2020 |
| Verity Project Consulting Ltd | Construction | 2022 |
| Verje Export Import UK Limited | Wholesale & retail | 2024 |
| Vertexqs Ltd | Professional & scientific | 2026 |
| Vertical Access Solutions Limited | Construction | 2022 |
| Verum Sagitta Ltd | Professional & scientific | 2015 |
| Very APT Ltd | Real estate | 2024 |
| Veselov Painting and Decorating Ltd | Construction | 2019 |
| Vestigo UK Ltd | Wholesale & retail | 2021 |
| Vethan Solutions Ltd | Wholesale & retail | 2011 |
| Vets Money Ltd | Extraterritorial | 2008 |
| VFN Training Solutions Ltd | Health & social care | 2024 |
| VGA Holding Ltd | Construction | 2018 |
| VGA Solutions Ltd | Construction | 2025 |
| Vibes Property Management Ltd | Real estate | 2020 |
| Vicarage Residential Care Home Ltd | Health & social care | 2020 |
| Vicky Gill Limited | Manufacturing | 2013 |
| Victorian Electrical Limited | Manufacturing | 2020 |
| Victory Quarters Limited | Real estate | 2017 |
| Victory Wine OFF License Ltd | Wholesale & retail | 2021 |
| Victory's Homes Ltd | Real estate | 2021 |