| True Driveways Ltd | Administrative & support | 2024 |
| Trueline Civils Limited | Construction | 2015 |
| Truepenny Commercials Ltd | Wholesale & retail | 2026 |
| Trustmark Roofing Installations Ltd | Construction | 2026 |
| Trwn Limited | Information & communication | 2013 |
| Trynutri Ltd | Wholesale & retail | 2026 |
| TSA International Ltd | Other services | 2007 |
| TSK Civils and Groundworks Limited | Construction | 2016 |
| Tspo Limited | Wholesale & retail | 2026 |
| Tssv Ltd | Hospitality | 2019 |
| TT Cars and Commercials Ltd | Wholesale & retail | 2025 |
| TT Scaffolding Ltd | Construction | 2018 |
| TTA. Talmont Ltd | Transport & logistics | 2017 |
| Tubergen Limited | Extraterritorial | 2011 |
| Tuition and Translation Services Spalding Limited | Professional & scientific | 2014 |
| Tulip-Fields Homes Ltd | Construction | 2025 |
| Tulipland Potatoes Holdings Limited | Financial services | 2017 |
| Tulipland Potatoes Limited | Wholesale & retail | 1992 |
| Turner Tech Limited | Wholesale & retail | 2019 |
| Turtle Splash Swim School Limited | Education | 2023 |
| Tusker Welland Limited | Hospitality | 2019 |
| Tuthill Engineering Consultants Ltd. | Manufacturing | 2013 |
| TVB Carpentry Limited | Manufacturing | 2025 |
| Tweeks Limited | Other services | 2014 |
| Twigden's Limited | Real estate | 2021 |
| Two Over One Limited | Professional & scientific | 2018 |
| Tydd Lodges Ltd | Real estate | 2016 |
| Tymr Pro Ltd | Real estate | 2025 |
| Tyres 4 Bikes Ltd | Wholesale & retail | 2012 |
| Tyron Trans Ltd | Transport & logistics | 2016 |
| Tyrrell Construction Limited | Construction | 2026 |
| Tyrrell Contractors Limited | Water & waste | 2009 |
| Tyrrell Properties Limited | Real estate | 1996 |
| U&M Jimax and Sons Ltd | Public administration | 2025 |
| U-Touch Ltd | Manufacturing | 2001 |
| U3 Racing Ltd | Wholesale & retail | 2024 |
| Ubitrac Ltd | Information & communication | 2009 |
| UBM Group Limited | Administrative & support | 2009 |
| UBM Peter Lind Plant Leasing Limited | Wholesale & retail | 2009 |
| Ufazy Ltd | Construction | 2026 |
| Ugly Mink Ltd | Professional & scientific | 2021 |
| UK Academy of Therapeutic Arts and Sciences Limited | Education | 2003 |
| UK Activ Limited | Administrative & support | 2009 |
| UK App. Services Ltd | Wholesale & retail | 2013 |
| UK B&R Ltd | Wholesale & retail | 2025 |
| UK Council for Hypnotherapy Limited | Other services | 2016 |
| UK Data Services Limited | Other services | 2020 |
| UK Europe Services Limited | Other services | 2017 |
| UK Ideal Ltd | Administrative & support | 2014 |
| UK Payroll People Limited | Administrative & support | 2024 |
| UK SOF Ltd | Education | 2025 |
| UK Spray Limited | Construction | 2012 |
| UK Truck Exports Limited | Wholesale & retail | 2018 |
| Ukcrisro Ltd | Transport & logistics | 2024 |
| Uktechtrader Ltd | Wholesale & retail | 2020 |
| Ultimate Resin Driveways Ltd | Construction | 2020 |
| Unique Cottage Studios Limited | Arts & recreation | 2010 |
| Unique Notions Ltd | Professional & scientific | 2016 |
| Unique Roofing (East Anglia) Ltd | Construction | 2020 |
| Unique Roofing (Norfolk) Ltd | Construction | 2025 |
| Unirose Limited | Public administration | 2025 |
| Unitech Roofing and Building Ltd | Construction | 2017 |
| United Healthcare Professionals Limited | Health & social care | 2017 |
| Unity Hub CIC | Education | 2026 |
| Universal Essence Ltd | Wholesale & retail | 2025 |
| University of Lincoln Academy Trust | Education | 2011 |
| UNO Homes & Properties Ltd | Construction | 2023 |
| UP Roofing Services Ltd | Construction | 2019 |
| Urban Nexus Real Estate Limited | Real estate | 2024 |
| Urban Planet Construction Limited | Construction | 2020 |
| Urban Planet Enterprise Ltd | Construction | 2024 |
| Urbanik Ltd | Transport & logistics | 2024 |
| Urpi Ltd | Transport & logistics | 2016 |
| Urry Financial Planning Limited | Financial services | 2013 |
| Usakauskas Logistics Ltd | Transport & logistics | 2024 |
| Uuep Ltd | Administrative & support | 2026 |
| Uzunyurt Holding Company Ltd | Construction | 2025 |
| V & D Transport Services Ltd | Transport & logistics | 2019 |
| V & K Property Ltd | Real estate | 2023 |
| V M Gedney Newsagents Limited | Wholesale & retail | 2002 |
| V Rotaru Ltd | Transport & logistics | 2018 |
| V-S-E-G Ltd | Transport & logistics | 2018 |
| V.I Market Ltd | Wholesale & retail | 2025 |
| V.M.M Property Limited | Real estate | 2019 |
| V8 Developments Limited | Wholesale & retail | 2001 |
| VA Engineering Ltd | Professional & scientific | 2024 |
| Vagabonds Langos- Taste of Hungary Ltd | Hospitality | 2023 |
| Valentin IT Ltd | Transport & logistics | 2018 |
| Valrom Trans Ltd | Transport & logistics | 2025 |
| Van DER Plas Flowers and Plants Ltd | Wholesale & retail | 2019 |
| Vanilla Roads Ltd | Transport & logistics | 2014 |
| Vantage Data Corporation Ltd | Professional & scientific | 2026 |
| Varden Axis Ltd | Professional & scientific | 2026 |
| Vasile Trans Limited | Transport & logistics | 2015 |
| Vault 11 Limited | Wholesale & retail | 2025 |
| Vault 20 Coffee Limited | Hospitality | 2014 |
| VAV Solutions Ltd | Transport & logistics | 2018 |
| Vdps Homes Ltd | Professional & scientific | 2014 |
| Vector FR Capital Ltd | Information & communication | 2021 |
| Velmonta Limited | Wholesale & retail | 2026 |