| Trinity Tax Services Limited | Professional & scientific | 1995 |
| Trio Property Services Ltd | Extraterritorial | 2026 |
| Triscott Properties Limited | Real estate | 2021 |
| Trojan Industrial Park Management Company Limited | Real estate | 1985 |
| Trouble Free Tax Limited | Extraterritorial | 2009 |
| Trowel Mate Limited | Manufacturing | 2007 |
| TRU Groove Ltd | Arts & recreation | 2025 |
| True Consulting Engineers Ltd | Professional & scientific | 2012 |
| True Natural Limited | Administrative & support | 2020 |
| True Time Publications Limited | Extraterritorial | 2010 |
| Trueline Paving Ltd | Construction | 2025 |
| Trump Solar Limited | Real estate | 2013 |
| Trust Assist Limited | Professional & scientific | 2004 |
| Truthbrush Limited | Wholesale & retail | 2017 |
| Tubers Academy Ltd | Administrative & support | 2016 |
| Tubers Ltd | Hospitality | 2019 |
| Tucker EMS Limited | Construction | 2005 |
| Tucker Holdings (SW) Limited | Financial services | 2025 |
| Tucketta Limited | Health & social care | 2026 |
| Tudor Clinic Ltd | Health & social care | 2012 |
| Tudor Close East Limited | Households | 2010 |
| Tudor Jones Properties Ltd | Real estate | 2021 |
| Turner Developments SW Limited | Real estate | 2018 |
| Turner Electrical Contractor Limited | Construction | 2014 |
| Turnpike Fields (Chudleigh Knighton) Management Company Ltd | Households | 2023 |
| Turtle Roll Ltd | Wholesale & retail | 2017 |
| Tutorpro Limited | Extraterritorial | 2022 |
| TVT Tractors Limited | Wholesale & retail | 2021 |
| Tweedie Consultancy Ltd | Professional & scientific | 2025 |
| Twelve 01 Holdings Limited | Professional & scientific | 2013 |
| Twisk (International) Ltd | Manufacturing | 2016 |
| Twmisco Ltd | Manufacturing | 2022 |
| Txtnation Limited | Administrative & support | 2005 |
| Tyler Home Products Ltd | Wholesale & retail | 2017 |
| Tyrobrook Limited | Real estate | 1985 |
| UK Biodiversity NET Gain Limited | Wholesale & retail | 2025 |
| UK Crowdfunding Association | Other services | 2013 |
| UK Firebarrier Ltd | Extraterritorial | 2026 |
| UK Passive Fire Consultants Ltd | Administrative & support | 2025 |
| UK Weather Chase CIC | Information & communication | 2026 |
| Ukraine Offshore Wind Coalition Ltd | Other services | 2024 |
| ULTIMATE99 Limited | Professional & scientific | 2008 |
| Ultimutt Workshops C.I.C. | Education | 2021 |
| Umbel Landscapes Ltd | Administrative & support | 2015 |
| Underle Ltd | Information & communication | 2021 |
| Unex (Southwest) Limited | Financial services | 2021 |
| Unicare Properties Limited | Real estate | 2021 |
| Unicaredevon Limited | Real estate | 2009 |
| Unicorn Construction (South West) Limited | Construction | 2007 |
| Unicorn Property Services (South West) Limited | Construction | 2017 |
| Unique Projects (Devon) Limited | Other services | 2022 |
| Unisus Limited | Other services | 2007 |
| United JPS Limited | Wholesale & retail | 2017 |
| Units 4 to 6 Hopkins Lane Limited | Real estate | 2023 |
| Unity PAT Testing Ltd | Manufacturing | 2018 |
| Universal Business Team Ltd | Extraterritorial | 2009 |
| Uplift Property Developments Ltd | Real estate | 2024 |
| Uppercutz 2015 Limited | Other services | 2015 |
| Urban Haul.Uk Limited | Transport & logistics | 2022 |
| Useful Data Matters Ltd | Information & communication | 2023 |
| Utility Maps 4 U Limited | Administrative & support | 2021 |
| Utility Rooms Limited | Other services | 2002 |
| V3 Build Limited | Construction | 2016 |
| VAL DI Cecina Ltd | Real estate | 2015 |
| Valday Group Ltd | Information & communication | 2026 |
| Vale Surveyors Ltd | Professional & scientific | 2021 |
| Valhalla Metals Ltd | Wholesale & retail | 2025 |
| Valhalla Network Limited | Financial services | 2022 |
| Valhalla Nickel Ltd | Wholesale & retail | 2025 |
| Vallance Ltd | Agriculture & fishing | 2012 |
| Valstone Engineering Ltd | Professional & scientific | 2023 |
| Van Go Art Couriers Ltd | Transport & logistics | 2015 |
| Vantage Point Investments Ltd | Real estate | 2022 |
| Vantage Strategies Limited | Health & social care | 2025 |
| Vape Vending Ltd | Wholesale & retail | 2026 |
| Vapourstation Limited | Wholesale & retail | 2013 |
| Vardy Mechanical Services Ltd | Construction | 2018 |
| Varitech Holdings Limited | Financial services | 2021 |
| Varitech Systems Limited | Manufacturing | 2008 |
| Varme TEC International Ltd | Construction | 2023 |
| Vauxhall Southwest Ltd | Wholesale & retail | 2024 |
| VB Projx Limited | Transport & logistics | 2016 |
| VBM Cartwright Properties Ltd | Real estate | 2022 |
| VCH Style Ltd | Wholesale & retail | 2024 |
| Velora Investment Ltd | Real estate | 2026 |
| Veltra Run Ltd | Wholesale & retail | 2025 |
| Venn Developments Limited | Construction | 2001 |
| Ventilate Limited | Construction | 2020 |
| Venture Chain Limited | Real estate | 2023 |
| Venturerecruit UK Limited | Administrative & support | 2023 |
| Vercoe IT Ltd | Information & communication | 2017 |
| Vertpaint Games Ltd | Information & communication | 2024 |
| Vertpaint Holdings Ltd | Financial services | 2024 |
| Vertpaint Ltd | Information & communication | 2019 |
| Verwey Psychology Limited | Education | 2024 |
| Vesos Solutions Limited | Information & communication | 2022 |
| Vesp Architects Limited | Professional & scientific | 2004 |
| Vesp Group Holdings Limited | Financial services | 2022 |
| Vesp Properties Limited | Professional & scientific | 2021 |
| Vicary & Sons Ltd | Real estate | 2017 |