| Triple V Logistics Limited | Transport & logistics | 2024 |
| TRM SPV Ltd | Real estate | 2018 |
| Trojan Contractors Ltd | Construction | 2020 |
| Troy Couriers Ltd | Transport & logistics | 2020 |
| TRU5TWAY Travel Solutions Ltd | Construction | 2022 |
| Trueessencecollective Limited | Administrative & support | 2025 |
| Truemarket Ltd | Wholesale & retail | 2026 |
| Trusted Trading Limited | Wholesale & retail | 2025 |
| TSI Motors Ltd | Professional & scientific | 2017 |
| Tsol Ltd | Real estate | 2021 |
| TSR Pharmacare Limited | Health & social care | 2023 |
| TSS Sweet Centre Ltd | Wholesale & retail | 2020 |
| TTK Trading Limited | Wholesale & retail | 2025 |
| Ttrolley Billing Limited | Construction | 2026 |
| Tudorville Ltd | Real estate | 2020 |
| Tuition With Qasim Ltd | Education | 2023 |
| Tung Transport Limited | Transport & logistics | 2024 |
| Tung Transport U.K. Ltd | Transport & logistics | 2025 |
| Tunjagi R Tumbo Ltd | Health & social care | 2015 |
| Turboactuators Ltd | Wholesale & retail | 2022 |
| Turbos Ltd | Wholesale & retail | 2022 |
| Turbovanes Ltd | Wholesale & retail | 2018 |
| Turf Station Limited | Wholesale & retail | 2024 |
| TUT Global Ltd | Transport & logistics | 2022 |
| Tuvik Limited | Construction | 2026 |
| Tv-Location Services Limited | Information & communication | 2013 |
| Tvision 247 Ltd | Financial services | 2022 |
| Twinz Care Ltd | Health & social care | 2021 |
| Twinz Logistics Ltd | Transport & logistics | 2023 |
| Two Falcons Ltd | Real estate | 2019 |
| Two Regis Ltd | Wholesale & retail | 2022 |
| Tyre ME Autocentre Limited | Wholesale & retail | 2013 |
| Tyreforceuk Ltd | Wholesale & retail | 2026 |
| U Khan Mpharm Ltd | Wholesale & retail | 2022 |
| Ubhi Investments Ltd | Real estate | 2025 |
| UK Darul Fajar Property Limited | Real estate | 2024 |
| UK Empire Pizza Ltd | Hospitality | 2021 |
| UK Gemini Property Ltd | Real estate | 2026 |
| UK Gold Exchange Limited | Manufacturing | 2020 |
| UK Immigration Ltd | Professional & scientific | 2020 |
| UK Mini Store Ltd | Wholesale & retail | 2025 |
| UK Mobiles Ltd | Wholesale & retail | 2020 |
| UK Nest Property Management Ltd | Real estate | 2018 |
| UK Nest Social Housing Ltd | Extraterritorial | 2022 |
| UK Pro Deliveries Limited | Transport & logistics | 2024 |
| UK Rapid Door Limited | Extraterritorial | 2003 |
| UK Recycling Company Limited | Water & waste | 2025 |
| UK Smart Homes Ltd | Construction | 2018 |
| UK Store 44 Ltd | Extraterritorial | 2024 |
| UK Suda Limited | Construction | 2013 |
| UK ZAM ZAM Ltd | Wholesale & retail | 2025 |
| Ultimate Driver Centre Ltd | Education | 2025 |
| Ultra Facilities Services Ltd | Extraterritorial | 1986 |
| Ultrasteel Products Limited | Extraterritorial | 1983 |
| Umairs Ltd | Wholesale & retail | 2025 |
| Umar Trading Ltd | Wholesale & retail | 2025 |
| Umbrella Dwellings Ltd | Real estate | 2025 |
| Umisia Store Ltd | Wholesale & retail | 2020 |
| Ummati Education Systems Ltd | Education | 2025 |
| Umrah Xpress Travel Ltd | Administrative & support | 2024 |
| Understanding Education Limited | Education | 2019 |
| Underwoodj Limited | Construction | 2025 |
| Unibox Boxing Ring Hire Ltd | Arts & recreation | 2016 |
| Unibox Boxing Rings Ltd | Arts & recreation | 2025 |
| Unipathway Limited | Education | 2025 |
| Unique Bars & Clubs Ltd | Other services | 2025 |
| Unique Care Network Limited | Health & social care | 2011 |
| Unique UK Beauty Ltd | Wholesale & retail | 2022 |
| Unison Integrated Technology Limited | Administrative & support | 1994 |
| United Rags Ltd | Manufacturing | 2013 |
| United Services 72 Limited | Transport & logistics | 2020 |
| United Stone Worktops Ltd | Manufacturing | 2022 |
| Universal Apartments (Bedford) Ltd | Real estate | 2026 |
| Universal Computech Limited | Other services | 2012 |
| Universal Developments Limited | Real estate | 2004 |
| Universal Money Limited | Financial services | 2025 |
| Universal PPE Ltd | Manufacturing | 2016 |
| Universal Space Limited | Real estate | 2024 |
| Universal Talent Ltd | Administrative & support | 2025 |
| Unknown LDN Limited | Wholesale & retail | 2015 |
| Unlocked Housing C.I.C. | Hospitality | 2025 |
| Untapped Voices Project Limited | Health & social care | 2023 |
| Urban Rentals Ltd | Real estate | 2013 |
| Urban Shopfronts Limited | Manufacturing | 2025 |
| Urbanclean Ltd | Administrative & support | 2025 |
| Urbanize Developments Ltd | Real estate | 2023 |
| Usama Elite Ltd | Wholesale & retail | 2025 |
| Used Car Showroom Limited | Transport & logistics | 2009 |
| USZ Global Ltd | Wholesale & retail | 2025 |
| Utopia Tiles Limited | Wholesale & retail | 2025 |
| Uzain Couries Ltd | Transport & logistics | 2026 |
| Uzairs Group Limited | Wholesale & retail | 2021 |
| V & J Holdings Limited | Real estate | 2018 |
| V Brothers Construction Ltd | Construction | 2025 |
| V&F Plastering Ltd | Construction | 2022 |
| V7 Health Treatments Ltd | Other services | 2025 |
| Vadech Ltd | Health & social care | 2025 |
| Valley Garden Centre Ltd | Wholesale & retail | 2026 |
| Valorossi Courier Ltd | Transport & logistics | 2026 |
| Van DEN Gertz Limited | Information & communication | 2017 |