| Ufland Properties Ltd | Real estate | 2019 |
| UHA Dynamics Ltd | Wholesale & retail | 2024 |
| Ujglad Solutions Limited | Health & social care | 2025 |
| UK Carpentry & Construction Ltd | Construction | 2021 |
| UK Complete Suit of Management Services Limited | Information & communication | 2018 |
| UK Ecohelp Ltd | Professional & scientific | 2025 |
| UK FE Holdings Limited | Financial services | 2017 |
| UK Fire and Electrical Limited | Construction | 2012 |
| UK Fire Door Inspection Ltd | Construction | 2024 |
| UK Fire Properties Limited | Real estate | 2018 |
| UK Home Rentals Ltd | Real estate | 2010 |
| UK Long Drive Ltd | Arts & recreation | 2025 |
| UK Minshang International Ltd | Professional & scientific | 2026 |
| UK NSD Ltd | Wholesale & retail | 2024 |
| UK Open IT Ltd | Information & communication | 2008 |
| UK Parquet Ltd | Construction | 2023 |
| UK Roofing & Construction Ltd | Construction | 2024 |
| UK Source Product Ltd. | Wholesale & retail | 2013 |
| UK Specialist Consultancy Ltd | Health & social care | 2025 |
| UK Tower Ltd | Real estate | 2020 |
| Ukenafa Limited | Health & social care | 2023 |
| Ulochinosa Limited | Health & social care | 2022 |
| Ultimate Resources Limited | Administrative & support | 2017 |
| Ultimatesnowsports Limited | Administrative & support | 2007 |
| Ultranerd Ltd | Construction | 2026 |
| UMR Store Ltd | Wholesale & retail | 2025 |
| Unelma Limited | Professional & scientific | 2017 |
| Uni-Padel Tennis Ltd | Arts & recreation | 2023 |
| Unicare Patient Transport Ltd | Transport & logistics | 2026 |
| Union Park Residents Management Company Limited | Real estate | 2017 |
| Uniq Block Management Limited | Administrative & support | 2019 |
| Uniq Investments Limited | Real estate | 2024 |
| Unique London Catering Delivery Limited | Hospitality | 2019 |
| Unique Tree Care Ltd | Administrative & support | 2021 |
| United Companies Ltd | Real estate | 2010 |
| United Glass Pension Plan Trustee Limited | Administrative & support | 1989 |
| Unity Heritage Property (UHP) Ltd | Real estate | 2026 |
| Unity Home Support Ltd | Health & social care | 2018 |
| Universal Agency Limited | Construction | 2016 |
| Universal Complex Care Ltd | Health & social care | 2018 |
| Universal Gospel Church | Other services | 2011 |
| Unlimited Talks Ltd | Information & communication | 2024 |
| UNO Odinma Ltd | Real estate | 2023 |
| Unofix Capital Ltd | Real estate | 2019 |
| Unofix Facades Ltd | Construction | 2011 |
| Unto Wellbeing Ltd | Education | 2024 |
| Untold Action Limited | Information & communication | 2022 |
| UPLIFT11 Sports Limited | Arts & recreation | 2022 |
| Uppingas Commercials Ltd | Real estate | 2025 |
| Uprise Medicals Limited | Health & social care | 2024 |
| Urban Collective Management Limited | Professional & scientific | 2023 |
| Urban Life Property Management Limited | Real estate | 2014 |
| Urban Owners Limited | Real estate | 2006 |
| Urban Solstice Interiors Ltd | Professional & scientific | 2025 |
| Urban Space Landscapes Limited | Extraterritorial | 2025 |
| Urbano Consulting Limited | Information & communication | 2016 |
| Urlay Nook Management Ltd | Households | 2021 |
| Usha Engineering & Construction Ltd | Construction | 2025 |
| Usher's Tree Work Ltd | Extraterritorial | 2023 |
| UT Pristine Services Ltd | Real estate | 2023 |
| Uters Luxury Travel Ltd | Construction | 2022 |
| Utileety Ltd | Professional & scientific | 2025 |
| Utilities Review Services Limited | Professional & scientific | 2016 |
| Utilities Support Engineering Limited | Construction | 1998 |
| Utkarsh Tech Ltd | Professional & scientific | 2022 |
| Utopia World Ltd | Health & social care | 2012 |
| Utopian Healthcare Ltd | Health & social care | 2021 |
| UV Life Limited | Health & social care | 2023 |
| UX Scope Limited | Information & communication | 2022 |
| Uygun Enterprise Ltd | Construction | 2023 |
| Uyiedo Association of Friends UK Limited | Health & social care | 2022 |
| Uzur Transport Limited | Transport & logistics | 2016 |
| V & M Window Cleaning Ltd | Administrative & support | 2020 |
| V Lika Construction Ltd | Construction | 2026 |
| V&B Joinery Ltd | Manufacturing | 2026 |
| V.& S. (NO.5) Limited | Households | 1987 |
| V.I. Logistics Ltd | Transport & logistics | 2021 |
| Va.Lj Limited | Administrative & support | 2018 |
| VAG Motors Limited | Wholesale & retail | 2018 |
| Valeanto Ltd | Wholesale & retail | 2018 |
| Valentine Chits Ltd | Financial services | 2016 |
| Valeur Developments Ltd | Construction | 2023 |
| Valianto Limited | Wholesale & retail | 2018 |
| Valley Grown Nurseries Limited | Manufacturing | 1997 |
| Valley Grown Salads Limited | Manufacturing | 2005 |
| Valley Industrial Products Ltd | Wholesale & retail | 2015 |
| Value Added Essence Ltd | Wholesale & retail | 2026 |
| Valuehut Consulting Ltd | Information & communication | 2014 |
| Vancko Ltd | Health & social care | 2026 |
| Vanity Glow Ltd | Other services | 2011 |
| Vanjust Ltd | Financial services | 2015 |
| Vantage Management Company (Tamworth) Limited | Households | 2021 |
| Vantage Point Capital Limited | Real estate | 2021 |
| Vantage Professional Services Ltd | Construction | 2019 |
| Vantforge Ltd | Manufacturing | 2024 |
| Vapezone HAT Ltd | Wholesale & retail | 2024 |
| Varagi Properties Ltd | Real estate | 2025 |
| Vark Ltd | Construction | 2023 |
| Varr Properties Ltd | Real estate | 2022 |
| VAS Corp Limited | Transport & logistics | 2016 |