| Tribe Caribe Ltd | Administrative & support | 2022 |
| Trinity Life Expressions Ltd | Information & communication | 2024 |
| Trinity Shipping Limited | Transport & logistics | 2023 |
| Trior Fashion Ltd | Wholesale & retail | 2026 |
| Triple a Glazing Ltd | Construction | 2024 |
| Triple a Global Logistics Ltd. | Transport & logistics | 2022 |
| Triple AV Ltd | Information & communication | 2025 |
| Trisoft Digital Ltd | Information & communication | 2024 |
| Troveatlas Ltd | Wholesale & retail | 2022 |
| TRP Cash & Carry Limited | Wholesale & retail | 2022 |
| TRP Fruit & VEG Ltd | Wholesale & retail | 2025 |
| True Quality Services - West London Ltd | Health & social care | 2017 |
| True Shop Ltd | Wholesale & retail | 2016 |
| Truehome Supplies Limited | Wholesale & retail | 2025 |
| Truenft Meta Corporation Ltd | Information & communication | 2025 |
| Truepoint Services Ltd | Professional & scientific | 2026 |
| Truspec Ltd | Wholesale & retail | 2025 |
| Truspoint Solutions Ltd | Wholesale & retail | 2025 |
| Truth Capital Limited | Professional & scientific | 2023 |
| Trycross Limited | Other services | 2025 |
| TS Heating & Plumbing Ltd | Construction | 2020 |
| TS Property and Investment Limited | Real estate | 2021 |
| TS Removal Services Ltd | Transport & logistics | 2024 |
| TS7 Construction Limited | Construction | 2023 |
| Tsaa Ltd | Professional & scientific | 2021 |
| TSB Investment & Construction Ltd | Real estate | 2014 |
| TSK Local Ltd | Wholesale & retail | 2026 |
| TSW. Parking Limited | Other services | 2023 |
| TT Properties UK PVT Limited | Real estate | 2022 |
| TT Services London Ltd | Construction | 2024 |
| TT Transport PVT Limited | Transport & logistics | 2017 |
| Tudor Rose (Southall) Limited | Hospitality | 2026 |
| Tuhi Tuhi SC Construction Limited | Construction | 2024 |
| Tulah Ltd | Health & social care | 2024 |
| Tulip Care 24/7 Limited | Health & social care | 2024 |
| Tung Enterprises Limited | Construction | 2016 |
| Turaba Ventures Limited | Health & social care | 2021 |
| Turay Digital Ltd | Wholesale & retail | 2026 |
| Tutoring at ITS Best Limited | Education | 2017 |
| TVA Investments Ltd | Real estate | 2026 |
| TVR Electrical Ltd | Construction | 2026 |
| TW Scholar's Tuition Centre Ltd | Education | 2018 |
| Twin Spin Ltd | Hospitality | 2024 |
| Twocombs Limited | Information & communication | 2016 |
| TY Melyn Limited | Health & social care | 2018 |
| Tycan Limited | Information & communication | 2022 |
| Typhon Games Ltd | Information & communication | 2023 |
| Tyre-Tastic Mobile Services London Ltd | Wholesale & retail | 2026 |
| Tyrell Williams Ltd | Construction | 2019 |
| Tyreout Ltd | Water & waste | 2025 |
| TYS Property Ltd | Real estate | 2024 |
| Tyson Food and Wine Ltd | Wholesale & retail | 2018 |
| Tyson G Ltd | Wholesale & retail | 2023 |
| U R Transport Limited | Transport & logistics | 2006 |
| U&I Motors Ltd | Wholesale & retail | 2024 |
| U-Like Clothing Co. Limited | Wholesale & retail | 2014 |
| U.P Roofing Solutions Ltd | Construction | 2023 |
| U.S.R Engineering Ltd | Manufacturing | 2015 |
| UA Construction Limited | Construction | 2016 |
| UB Maida Vale Ltd | Hospitality | 2026 |
| UB Richmond Ltd | Hospitality | 2026 |
| UB1 Holdings Limited | Real estate | 2023 |
| UB2 Tiles Ltd | Wholesale & retail | 2022 |
| UB2 Tyres Ltd | Wholesale & retail | 2025 |
| UK ALU Tech Ltd | Manufacturing | 2021 |
| UK Designer Limited | Wholesale & retail | 2009 |
| UK Dreamclouds Ltd | Wholesale & retail | 2024 |
| UK Electrical Limited | Construction | 2015 |
| UK Food and Catering Ltd | Hospitality | 2021 |
| UK Freight Limited | Transport & logistics | 2024 |
| UK Fresh Vegetables Limited | Wholesale & retail | 2020 |
| UK Genetics Ltd | Wholesale & retail | 2018 |
| UK House Ltd | Real estate | 2024 |
| UK Mobile Parts Ltd | Wholesale & retail | 2025 |
| UK PDA Limited | Education | 2025 |
| UK Safe Deposit Lockers Limited | Financial services | 2014 |
| UK Shopfronts & Glazing Ltd | Construction | 2010 |
| UK VIP Chauffeurs Ltd | Transport & logistics | 2011 |
| UK VP Limited | Wholesale & retail | 2025 |
| UK Wholesale Logistics Ltd | Transport & logistics | 2016 |
| UK Works Ltd | Other services | 2025 |
| Uk.Nett Ltd | Construction | 2025 |
| Ultiimate Limited | Wholesale & retail | 2023 |
| Ultimate Consultancy Limited | Financial services | 2012 |
| Ultimate Divas Limited | Arts & recreation | 2006 |
| UMA Shanker Construction Ltd | Construction | 2025 |
| Umar and Usman Limited | Construction | 2013 |
| Umer Aslam Limited | Wholesale & retail | 2024 |
| UMY Trading UK Ltd | Wholesale & retail | 2020 |
| Under the HAT Entertainment Ltd | Arts & recreation | 2023 |
| Under the HAT Music Ltd | Arts & recreation | 2024 |
| Uniform Store London Ltd | Wholesale & retail | 2013 |
| Union Jack Studio Limited | Information & communication | 2025 |
| Union Power & Petroleum Ltd | Wholesale & retail | 2021 |
| Uniqe Trader Ltd | Wholesale & retail | 2023 |
| Unique BM Properties Ltd | Real estate | 2017 |
| Unique Builders and Developers Ltd | Construction | 2025 |
| Unique Gold Ltd | Wholesale & retail | 2023 |
| Unique MOT Limited | Wholesale & retail | 2017 |
| Unique Motors Ltd | Wholesale & retail | 2024 |