| Tunbridge Wells Colorectal Surgery Limited | Health & social care | 2013 |
| Turnberry Consulting Group Limited | Professional & scientific | 2025 |
| Turnberry Properties Group Limited | Real estate | 2025 |
| Turnberry Property Developments Ltd | Real estate | 2010 |
| Turnbull & Sword Limited | Arts & recreation | 2018 |
| TUS REC Ltd | Information & communication | 2025 |
| Twenty First Century Ultrasound Ltd | Health & social care | 2012 |
| Twithc Limited | Education | 2016 |
| TYN LON (Anglesey) Limited | Real estate | 2020 |
| Tyrer Medical Services Limited | Health & social care | 2016 |
| U.B.M.Pension Trust Limited | Professional & scientific | 1950 |
| U3B Ltd | Professional & scientific | 2016 |
| Ucheck Limited | Information & communication | 2011 |
| UDL Travel Ltd | Transport & logistics | 2019 |
| UFK Trade Holdings Ltd | Health & social care | 2022 |
| UIS Holdings (Manchester) Ltd | Financial services | 2025 |
| UIS Utility Tooling Limited | Manufacturing | 2022 |
| UK Digital Dental LAB Limited | Health & social care | 2023 |
| UK EAR Skin & Aesthetics Ltd | Health & social care | 2025 |
| UK Football Academy Ltd | Education | 2023 |
| UK Fourcompany Limited | Wholesale & retail | 2026 |
| UK GAS and Heating Limited | Construction | 2025 |
| UK Laka Cosmetics Inc. Limited | Wholesale & retail | 2026 |
| UK Mapping & Epos Solutions Ltd | Information & communication | 2008 |
| UK Orthobiologics Clinic Ltd | Health & social care | 2019 |
| UK Padel Courts Ltd | Manufacturing | 2022 |
| UK Probate Limited | Professional & scientific | 2017 |
| UK Property Code Ltd | Information & communication | 2018 |
| UK Rocks Ltd | Construction | 2009 |
| UK Together Limited | Professional & scientific | 2008 |
| UK UNI Courses Ltd | Professional & scientific | 2025 |
| Ultima Kitchens Limited | Manufacturing | 2004 |
| Ultra Clean Ovens Ltd | Administrative & support | 2014 |
| Ultra Productions Limited | Administrative & support | 2026 |
| Umbrella Accountants LLP | | 2010 |
| Umbrella Employee Ownership Trustee Limited | Professional & scientific | 2025 |
| Umbrella-Company Limited | Professional & scientific | 2009 |
| Unboxt Developments Limited | Construction | 2016 |
| Undisputed Films Ltd | Information & communication | 2020 |
| Unicot Aesthetics Ltd | Other services | 2025 |
| Unified Delivery People Ltd | Information & communication | 2025 |
| Unified Medical Limited | Administrative & support | 2018 |
| Unique Living Solutions Limited | Construction | 2018 |
| Uniquesale Limited | Health & social care | 2004 |
| Unity Future Homes Ltd | Health & social care | 2025 |
| Unity Surgical Limited | Health & social care | 2025 |
| Universal Outlet Limited | Wholesale & retail | 2021 |
| Unknown Practice Limited | Professional & scientific | 2021 |
| Unveiled Bridal Limited | Other services | 2025 |
| Upholland Gardens Management Company Limited | Households | 2019 |
| Uppingham Estates (Manchester) Limited | Households | 2016 |
| Upright Consulting Limited | Information & communication | 2016 |
| Upskilla Limited | Education | 2023 |
| Upton Dene (Management Company) Limited | Households | 2008 |
| Upton Grange (Chester) Management Company Limited | Households | 2019 |
| UR Consulting Limited | Professional & scientific | 2025 |
| Urban Brit Living Limited | Real estate | 2019 |
| Urban Co-Living Investments Ltd | Real estate | 2016 |
| Urban Costaying Limited | Real estate | 2019 |
| Urban Lites Design Ltd | Professional & scientific | 2021 |
| Urban Sereno Limited | Wholesale & retail | 2025 |
| Urban Strong Ltd | Real estate | 2025 |
| Urban Village Bars (Kampus) Limited | Hospitality | 2019 |
| Urban Village Bars (NQ) Limited | Hospitality | 2017 |
| Urban Village Bars Limited | Hospitality | 2014 |
| Urbn Sply Co Ltd | Wholesale & retail | 2016 |
| Urgentaction Limited | Construction | 1984 |
| Usah Medical Ltd | Health & social care | 2025 |
| Usque Ltd | Financial services | 2023 |
| Utility Site Services Limited | Construction | 2016 |
| UVB 5 Limited | Hospitality | 2022 |
| UX Sequence Ltd | Information & communication | 2020 |
| V Care Limited | Professional & scientific | 2013 |
| V&E Technologies Ltd | Information & communication | 2025 |
| V4P (Selly Oak) Newco Limited | Professional & scientific | 2025 |
| VA VA Verve Ltd | Wholesale & retail | 2023 |
| Vado UK Limited | Professional & scientific | 2008 |
| Vajramudita Ltd | Professional & scientific | 2011 |
| Valpart Enterprises Limited | Administrative & support | 2018 |
| Valtrus Limited | Wholesale & retail | 2019 |
| Valuation Audit Services UK Ltd | Real estate | 2015 |
| Van DEN Berg Hardwoods Ltd | Wholesale & retail | 2021 |
| Vandesharma Limited | Health & social care | 2020 |
| Vanessa Commodore Services Limited | Professional & scientific | 2012 |
| Vanga Ltd | Real estate | 2024 |
| Varada Lakshmi Investments Ltd | Financial services | 2021 |
| Varmel Ltd | Professional & scientific | 2019 |
| Vascular Specialist Care Limited | Health & social care | 2022 |
| Vascular Surgery Limited | Health & social care | 2012 |
| Vassa Limited | Administrative & support | 2016 |
| Vaughan Medical Services Limited | Health & social care | 2024 |
| Vaze Investments Ltd | Real estate | 2024 |
| VB Medical Limited | Health & social care | 2019 |
| Vdlowes Medical Limited | Health & social care | 2019 |
| VE Medical Accountant Ltd | Professional & scientific | 2022 |
| Vebo Concept Design Limited | Professional & scientific | 2016 |
| Vebro Polymers Holdings Limited | Manufacturing | 2019 |
| Vebro Polymers Specialities Limited | Manufacturing | 2025 |
| Vebro Polymers UK Limited | Manufacturing | 2019 |
| Vejovian Services Limited | Health & social care | 2023 |