| UK Turbo Performance Ltd | Wholesale & retail | 2025 |
| UK Vehicle Dismantlers Limited | Water & waste | 2015 |
| Ukfiresupplies Ltd | Wholesale & retail | 2022 |
| Ukgaze Ltd | Wholesale & retail | 2025 |
| Ukregtech Ltd | Information & communication | 2025 |
| Ultima Services Ltd | Administrative & support | 2024 |
| Ultimate Security Systems Ltd | Administrative & support | 2021 |
| Ultimate Tools Limited | Manufacturing | 2013 |
| Ultimate Travel Experience Ltd | Administrative & support | 2022 |
| UN Touchable Care Servises Ltd | Health & social care | 2014 |
| Under 80 Limited | Extraterritorial | 2015 |
| Underbeast Ltd | Health & social care | 2018 |
| Undiscovered Solutions Limited | Professional & scientific | 2021 |
| UNI Tech Support Limited | Information & communication | 2012 |
| Uni-Trading House Limited | Extraterritorial | 2014 |
| Unique Mobile Catering Limited | Hospitality | 2020 |
| Unique Stays Ltd | Real estate | 2025 |
| Unisex Hair Arts on Sea Ltd | Other services | 2020 |
| United Carbon Alliance Ltd | Professional & scientific | 2024 |
| United Care (South) Limited | Health & social care | 2011 |
| United Krav Maga Academy Ltd | Arts & recreation | 2014 |
| United Property (UK) Limited | Real estate | 1996 |
| UNITED777 Ltd | Hospitality | 2025 |
| Unitruc Limited | Transport & logistics | 1984 |
| Universal Trading Corporation Ltd | Wholesale & retail | 2022 |
| Unjam Solutions Ltd | Information & communication | 2025 |
| Unlckd Limited | Financial services | 2024 |
| UP2YOUTH Ltd | Information & communication | 2025 |
| Upholstery Specialist Ltd | Other services | 2024 |
| Uplands CR Solutions Limited | Administrative & support | 2019 |
| Urban Edge London Construction Ltd | Administrative & support | 2016 |
| Urban Grove Limited | Administrative & support | 2011 |
| Urban PAW Prints Ltd | Other services | 2015 |
| Urban Spaces (Essex) Limited | Real estate | 2025 |
| Urbanfitness London 81 Limited | Arts & recreation | 2017 |
| Urbanfitness London Property Limited | Arts & recreation | 2015 |
| Urpeth Green (Ouston) Management Company Limited | Households | 2016 |
| Us.Cambridge.Co.Uk Ltd | Manufacturing | 2024 |
| UVA PVT Ltd | Real estate | 2025 |
| Uvani Limited | Wholesale & retail | 2025 |
| V - MAX Motors Ltd | Wholesale & retail | 2019 |
| V-Niche Ltd | Construction | 2025 |
| V. C. Decs Limited | Construction | 2013 |
| V20 Properties Ltd | Real estate | 2026 |
| VAD PVT Limited | Wholesale & retail | 2025 |
| Vadi 2024 Ltd | Hospitality | 2024 |
| Valentine Property Holdings Limited | Real estate | 2019 |
| Valhalla Business Investments Limited | Other services | 2018 |
| Valkyrie 10 RTM Company Ltd | Professional & scientific | 2015 |
| Valkyrie Associates Limited | Education | 2012 |
| Valor Athletica Ltd | Arts & recreation | 2020 |
| Valueformation Limited | Professional & scientific | 2025 |
| Vamsi Associates Limited | Public administration | 2022 |
| Van Looys Fish and Chips Limited | Hospitality | 2023 |
| Vanguard Consultants Limited | Information & communication | 2020 |
| Vanguard Security Limited | Administrative & support | 2008 |
| Vantage Graphics Limited | Professional & scientific | 1991 |
| Vape & Liquid Limited | Wholesale & retail | 2024 |
| Vaporeso Ltd | Wholesale & retail | 2025 |
| Vasc Limited | Households | 2023 |
| Vaticinate Pictures Ltd | Information & communication | 2018 |
| Vault of Jake Ltd | Financial services | 2026 |
| VB Infotech Solutions Ltd | Information & communication | 2024 |
| Vecteo Ltd | Transport & logistics | 2019 |
| Vegan Mortgage Adviser Ltd | Financial services | 2019 |
| VEL Home Care Ltd | Public administration | 2026 |
| Velfit Ltd | Construction | 2018 |
| Velloria Ltd | Wholesale & retail | 2026 |
| Velo Apartments Ltd | Real estate | 2017 |
| Velorwell Ltd | Real estate | 2026 |
| Venables Associates Employee Ownership Trustee Limited | Professional & scientific | 2019 |
| Venables Associates Limited | Professional & scientific | 1989 |
| Veni Vidi Vici Ltd | Information & communication | 2010 |
| Ventam Systems Limited | Manufacturing | 2002 |
| Ventrica Ltd | Administrative & support | 2009 |
| Ventura Analytics Ltd | Administrative & support | 2018 |
| Venus Art Atelier CIC | Education | 2025 |
| Verana Wellness Ltd | Wholesale & retail | 2025 |
| Verandas UK Group Ltd | Construction | 2026 |
| Verb Performance Ltd | Professional & scientific | 2025 |
| Verdant Environmental Ltd | Professional & scientific | 2016 |
| Verdin House Management Limited | Households | 2014 |
| Verifi Mortgages Ltd | Financial services | 2023 |
| Verifiedok Ltd | Wholesale & retail | 2026 |
| Veritas Inspections Limited | Public administration | 2019 |
| Versatile Contracts Limited | Construction | 2009 |
| Versifi Ltd | Other services | 2025 |
| Vertex Surveying Group Ltd | Professional & scientific | 2026 |
| Vertical Design Ltd | Professional & scientific | 2025 |
| Vertical Market Recruitment Group Ltd | Professional & scientific | 2012 |
| VHL Hair & Beauty Ltd | Other services | 2026 |
| VI & DI Limited | Construction | 2020 |
| Viana IT Consultancy Ltd | Information & communication | 2016 |
| Vibrant Minds After School Club Limited | Education | 2013 |
| Vibrant Minds ASC Limited | Health & social care | 2024 |
| Vicarage Systems Limited | Financial services | 2014 |
| Victoria Adams Limited | Other services | 2016 |
| Victoria Art & Brew Ltd | Wholesale & retail | 2026 |
| Victoria Care Home Ltd | Health & social care | 2024 |
| Victoria Central Management Company Limited | Real estate | 2021 |