| Truscar Motors Ltd | Wholesale & retail | 2025 |
| Trust & SON Construction Ltd | Construction | 2022 |
| Trustpoint Security Ltd | Administrative & support | 2025 |
| Trutemp Ltd | Manufacturing | 2017 |
| TS Commercial and Project Management Ltd | Professional & scientific | 2015 |
| TS Property (TAM) Ltd | Real estate | 2017 |
| TSG Construction and Landscaping Ltd | Construction | 2023 |
| Tubez Scaffolding Services Limited | Construction | 2020 |
| Tuch Limited | Other services | 2007 |
| Tudor Residential Ltd | Health & social care | 2024 |
| Tudor Rose Water Features Ltd | Manufacturing | 2024 |
| Turfcare Supplies Limited | Arts & recreation | 2019 |
| Turkish Barber 66 Ltd | Other services | 2026 |
| Turkish Barber Tamworth Ltd | Other services | 2024 |
| Turners Watercare U.K. Ltd | Administrative & support | 2004 |
| TW Property Rentals Limited | Real estate | 2024 |
| TWC Property Limited | Real estate | 2020 |
| TWG Serv Ltd | Wholesale & retail | 2025 |
| Twilight Designs Limited | Wholesale & retail | 2009 |
| Twinsalesuk Ltd | Wholesale & retail | 2023 |
| Twinz Beauty Box Ltd | Other services | 2020 |
| Twisted Monkey Ltd | Professional & scientific | 2009 |
| Twisted Pizza Ltd | Hospitality | 2021 |
| Two Krakens Ltd | Administrative & support | 2014 |
| Tyko Electrical Services Ltd | Construction | 2009 |
| Tyneholme Financial Consulting Ltd | Professional & scientific | 2022 |
| Tyre Link (UK) Limited | Wholesale & retail | 1995 |
| TZA Properties Ltd | Real estate | 2022 |
| U Best Profits Limited | Hospitality | 2015 |
| U K Plastering Limited | Construction | 2009 |
| Uavisual Ltd | Professional & scientific | 2014 |
| Ubiquitous Education Limited | Education | 2026 |
| UK Concrete Flooring Specialists Ltd | Construction | 2022 |
| UK Erecting Services Limited | Construction | 1996 |
| UK Gaming Gear Ltd | Wholesale & retail | 2018 |
| UK Precast Services Ltd | Construction | 2016 |
| UK Rail Services Limited | Transport & logistics | 2021 |
| UK Renewable & Electrical Solutions Ltd | Construction | 2025 |
| UK Renewable Solutions Limited | Construction | 2025 |
| UK Wholesale Tyres Ltd | Wholesale & retail | 2019 |
| Ultimate GAS Ltd | Construction | 2018 |
| Ultimate Lift Services Limited | Manufacturing | 2017 |
| Ultracore Distribution Limited | Wholesale & retail | 2020 |
| Ultratek Racing Ltd | Administrative & support | 2017 |
| Umami Retail Ltd | Manufacturing | 2010 |
| UNA Suffolk Limited | Education | 2022 |
| Unbownd Limited | Manufacturing | 2019 |
| Unchained for Success Ltd | Wholesale & retail | 2026 |
| Under Pressure Cleaning Services Limited | Construction | 2017 |
| Underwood Mortgage Solutions Ltd | Financial services | 2022 |
| Uneek Civil Engineering Ltd | Construction | 2022 |
| Unicrimp Limited | Wholesale & retail | 2013 |
| Uniplate Limited | Wholesale & retail | 1986 |
| Unique Development Solutions Ltd | Real estate | 2018 |
| Unique Expeditions Ltd | Administrative & support | 2019 |
| Unique Indoor Golf Ltd | Arts & recreation | 2024 |
| Uniseal Limited | Manufacturing | 2003 |
| Unisol Logistics Limited | Other services | 2014 |
| United Sameday Solutions Ltd | Transport & logistics | 2016 |
| UNITTWO7CARS Limited | Wholesale & retail | 2026 |
| Unity Designs Limited | Professional & scientific | 1999 |
| Unity Electrical Contractors Ltd | Construction | 2023 |
| Universal Branding Group Ltd | Manufacturing | 2013 |
| UPD8ALL Limited | Information & communication | 2022 |
| Upfit Design Ltd | Construction | 2011 |
| Uplift Consultants Limited | Information & communication | 1998 |
| Uppal Capital Investments Limited | Hospitality | 2024 |
| Uppal Group Ventures Ltd | Construction | 2023 |
| Upper Kuts Barbers Ltd | Other services | 2017 |
| Upright Fencing Contractors Ltd | Construction | 2006 |
| Upright Holdings Limited | Financial services | 2016 |
| Urban Living Property Ltd | Real estate | 2025 |
| Urban Services Co (West Midlands) Ltd | Administrative & support | 2017 |
| Urban Tribe 2 Ltd | Real estate | 2026 |
| Ursula Bick Interiors Limited | Administrative & support | 2021 |
| Utopia Accounting Limited | Professional & scientific | 2018 |
| Utopia Rentals Ltd | Hospitality | 2015 |
| V Whittington Legal Services Ltd | Professional & scientific | 2022 |
| V-Lectric Limited | Construction | 2003 |
| V6 NJO Consultant Ltd | Professional & scientific | 2025 |
| VA Creative Ltd | Wholesale & retail | 2025 |
| Vaerdi Recruitment Ltd | Administrative & support | 2025 |
| Vahini Homes Ltd | Real estate | 2023 |
| Vahlharun Limited | Information & communication | 2025 |
| Valconstruct Limited | Construction | 2023 |
| Valorem Partners Limited | Administrative & support | 2015 |
| Value Area Limited | Wholesale & retail | 1999 |
| Van & Truck Sales Limited | Wholesale & retail | 2017 |
| Vandeca Limited | Real estate | 2019 |
| Vanemlo Limited | Health & social care | 2022 |
| Vanguard Vehicle Maintenance Limited | Wholesale & retail | 2021 |
| Vanina Ltd | Transport & logistics | 2022 |
| Vantage Wholesale UK Ltd | Wholesale & retail | 2026 |
| Vantastic Deals Ltd | Wholesale & retail | 2023 |
| Varnagys Ltd | Construction | 2024 |
| Vasai Investment Limited | Real estate | 2018 |
| VB 1218 Limited | Real estate | 2018 |
| VD Tech Consultancy Ltd | Information & communication | 2023 |
| Veatu Flooring Ltd | Construction | 2019 |
| Velletia Limited | Real estate | 2020 |