| Trailparts Ltd | Wholesale & retail | 2019 |
| Training Angel Services Ltd | Education | 2020 |
| Training Contract Success Limited | Information & communication | 2007 |
| Trakme Limited | Information & communication | 2023 |
| Tranquilshift Limited | Health & social care | 2024 |
| Trans BMI Ltd | Transport & logistics | 2026 |
| Trans Line Service Ltd | Wholesale & retail | 2024 |
| Transactly Ltd | Information & communication | 2026 |
| Transam Kenya UK Ltd | Wholesale & retail | 2026 |
| Transdeiva Ltd | Transport & logistics | 2023 |
| Transect HP Ltd | Wholesale & retail | 2025 |
| Transformation Unlocked Ltd | Information & communication | 2026 |
| Transient Homes Ltd | Real estate | 2020 |
| Transport & Construction Services Limited | Construction | 2022 |
| Transport G M Ltd | Transport & logistics | 2019 |
| Transport Road Ltd | Transport & logistics | 2025 |
| Transportation Ephemera Limited | Wholesale & retail | 2021 |
| Trasparenza Ltd | Professional & scientific | 2025 |
| Travel BEZ Obmezhen Limited | Administrative & support | 2025 |
| Travel House Global Flights Limited | Administrative & support | 2024 |
| Travel Hub Intl. Ltd | Administrative & support | 2025 |
| Travelglobeuk Limited | Administrative & support | 2021 |
| Travesta Limited | Wholesale & retail | 2012 |
| TRC Trading Limited | Information & communication | 2014 |
| Treadco Ltd | Wholesale & retail | 2025 |
| Treasure Tower Limited | Real estate | 2015 |
| Treat Drop Limited | Wholesale & retail | 2025 |
| Treatment Holdings Ltd | Professional & scientific | 2024 |
| Treatment Limited | Information & communication | 2017 |
| Treatment Properties Ltd | Real estate | 2024 |
| Tree-Tops Kidz Club Ltd | Health & social care | 2025 |
| Trees and Leaves (PVT) Limited | Wholesale & retail | 2018 |
| Trend Auto Cars Ltd | Wholesale & retail | 2025 |
| Trend Media Services Ltd | Information & communication | 2020 |
| Trend Tool Technology Ltd | Wholesale & retail | 1977 |
| Trending Business Limited | Health & social care | 2013 |
| Trendy BIM Limited | Professional & scientific | 2015 |
| Treppan Living (UK) Limited | Information & communication | 2026 |
| Tres Chic London Ltd | Wholesale & retail | 2025 |
| Tresuvie Limited | Wholesale & retail | 2023 |
| Treun Consulting Ltd | Professional & scientific | 2019 |
| Treun ROC Contracts Ltd | Construction | 2025 |
| Treviso Trade Hold Ltd | Manufacturing | 2023 |
| Trezco Ltd | Information & communication | 2012 |
| TRI Agency Ltd | Information & communication | 2023 |
| Tri-Ventures Group Limited | Administrative & support | 1994 |
| Triangel Investments Ltd | Real estate | 2020 |
| Triangle Engineering Lincoln Ltd | Construction | 2017 |
| Triangle Healthcare (UK) Ltd | Wholesale & retail | 1996 |
| Trico Logistics Global Limited | Administrative & support | 2017 |
| Tricolour Consulting Ltd | Professional & scientific | 2017 |
| Trident Consortium Ltd | Real estate | 2026 |
| Trident Consulting Ltd | Information & communication | 2024 |
| Trident Project Management Limited | Information & communication | 2007 |
| Trident Ventures Limited | Professional & scientific | 2014 |
| Tridonic Distribution UK Limited | Wholesale & retail | 2001 |
| Trifecta Holdings Ltd | Real estate | 2020 |
| Trifecta Holidays Ltd | Real estate | 2022 |
| Trifecta Properties Ltd | Real estate | 2019 |
| Trigg TR INT Limited | Professional & scientific | 2025 |
| Trilec Electrical Contractors Limited | Construction | 2019 |
| Trilegacy Ltd | Real estate | 2026 |
| Trim Workz Ltd | Wholesale & retail | 2024 |
| Trim'Z Hair Salon Limited | Other services | 2018 |
| Trimayu Ltd | Wholesale & retail | 2024 |
| Trimeg Consulting Ltd | Information & communication | 2016 |
| Trimmers 57 Limited | Professional & scientific | 2020 |
| Trinity Court Solutions Ltd | Professional & scientific | 2018 |
| Trinity Sounds Ltd | Other services | 2023 |
| Trinity Teaching and Training Limited | Professional & scientific | 2014 |
| Trinity Textiles Ltd | Arts & recreation | 2013 |
| Trinity Touch (Europe) Ltd | Wholesale & retail | 1998 |
| Trioche Limited | Wholesale & retail | 2025 |
| Tripax Ltd | Transport & logistics | 2024 |
| Triple a Property Group Ltd | Real estate | 2022 |
| Triple Constraint Consulting Ltd | Professional & scientific | 2013 |
| Triple Juicy Limited | Arts & recreation | 1998 |
| Triple Lean Ltd | Manufacturing | 2025 |
| Triple M Solutions Limited | Professional & scientific | 2011 |
| Triple Vision Investments Ltd | Construction | 2025 |
| Triple Z London Ltd | Real estate | 2019 |
| Triplift Ltd | Transport & logistics | 2025 |
| Tripple a Homers Ltd | Public administration | 2021 |
| Tripplejay Limited | Information & communication | 2015 |
| Trisha Investments Ltd | Real estate | 2024 |
| Tritec Building Services Ltd | Professional & scientific | 2009 |
| Tritec Environmental Services Limited | Construction | 1989 |
| Triumph 8 Ltd | Professional & scientific | 2024 |
| Trivera Investments Limited | Financial services | 2025 |
| TRM Dwellings Ltd | Real estate | 2021 |
| Troci Construction Services Ltd | Construction | 2025 |
| Troikey Limited | Information & communication | 2012 |
| Trollope & Colls Homes Limited | Professional & scientific | 1987 |
| Trollope & Colls(City)Limited | Professional & scientific | 1967 |
| Trophies Medals & More Ltd | Wholesale & retail | 2019 |
| Tropic Constructions PVT Ltd | Real estate | 2018 |
| Tropic International (PVT) Ltd | Wholesale & retail | 2010 |
| Tropiqa Ltd | Real estate | 2024 |
| Troubleshoot Consulting Ltd | Professional & scientific | 2025 |
| Troubleshooter Group Limited | Professional & scientific | 2007 |