| Trade in Foods Ltd | Wholesale & retail | 2025 |
| Trade Scale Limited | Information & communication | 2026 |
| Trade Ultra Ltd | Wholesale & retail | 2020 |
| Tradelinc Technologies Ltd | Wholesale & retail | 2020 |
| Trademagic Holdings Limited | Financial services | 2015 |
| Trademagic Limited | Wholesale & retail | 2006 |
| Tradinguk Ltd | Wholesale & retail | 2024 |
| Traditional Holdings Limited | Professional & scientific | 2005 |
| Traditional Slapstick Pantomimes Limited | Arts & recreation | 2016 |
| Traditional Structures Limited | Construction | 1988 |
| Trafalgar Consulting (Cannock) Ltd | Professional & scientific | 2024 |
| Trakkit Couriers Ltd | Transport & logistics | 2021 |
| Tran Gardening Centre Ltd | Agriculture & fishing | 2019 |
| Tranquil Shelters Limited | Real estate | 2025 |
| Trans Africa Trade Ltd | Wholesale & retail | 2022 |
| Trans Plech Ltd | Transport & logistics | 2019 |
| Trans-World Commerce Limited | Wholesale & retail | 1992 |
| TRANS4M Training Limited | Professional & scientific | 2020 |
| Transandrei (West Midlands) Ltd | Transport & logistics | 2018 |
| Transaxle Limited | Wholesale & retail | 1994 |
| Transform a Floor Ltd | Construction | 2015 |
| Transport Specialists Limited | Transport & logistics | 2020 |
| Transporting Ltd | Construction | 2024 |
| Transylvaniagoldhoney Ltd | Wholesale & retail | 2025 |
| Tranter Richards Limited | Real estate | 2025 |
| Tras Investments Limited | Real estate | 2019 |
| Travel Midlands Ltd | Transport & logistics | 2024 |
| Travel UK (Midlands) Ltd | Transport & logistics | 2024 |
| Travel With J Ltd | Administrative & support | 2026 |
| Travelair(Gh) Ltd | Transport & logistics | 2013 |
| Travelstar European Ltd | Transport & logistics | 2005 |
| Trayd Developments Ltd | Construction | 2021 |
| Trbb Investments Limited | Real estate | 2022 |
| Treblled Healthcare Solutions Ltd | Health & social care | 2020 |
| Treetops Kindergarden Ltd | Health & social care | 2019 |
| Tregartha Civil Engineering Limited | Construction | 2024 |
| Trend Wave Ltd | Wholesale & retail | 2025 |
| Trent Storage Limited | Transport & logistics | 2021 |
| Trethix Ltd | Financial services | 2026 |
| Trew Digital Media Ltd | Professional & scientific | 2026 |
| TRF Developments Limited | Construction | 2015 |
| TRF Investments Ltd | Real estate | 2026 |
| TRI Media Solutions Ltd | Information & communication | 2026 |
| Tri-Spectra Limited | Hospitality | 2017 |
| Tria Consulting Ltd | Professional & scientific | 2013 |
| Triarc Ltd | Extraterritorial | 2025 |
| Trident Group Security Limited | Administrative & support | 2017 |
| Trident Living Limited | Real estate | 2025 |
| Trifast Holdings (Asia) Ltd | Professional & scientific | 1993 |
| Trifast Overseas Holdings Limited | Professional & scientific | 1994 |
| Trifast PLC | Professional & scientific | 1985 |
| Trik Solutions Ltd | Real estate | 2017 |
| Trilogy Pharm Ltd | Wholesale & retail | 2023 |
| Trim Tech Solutions Limited | Other services | 2015 |
| Trimet Alloys Ltd | Professional & scientific | 2010 |
| Trimselter Holdings Limited | Financial services | 2014 |
| Trimselter Limited | Professional & scientific | 1980 |
| Trinity 10 Ltd | Health & social care | 2012 |
| Trinity Assets Limited | Real estate | 2017 |
| Trinity Logistics and Communication Ltd | Construction | 2023 |
| Trio Rendering Ltd | Construction | 2025 |
| Triple 88 88 88 Cars Ltd | Transport & logistics | 2022 |
| Triple 88 88 88 Ltd | Transport & logistics | 2022 |
| Triple D Express Ltd | Transport & logistics | 2006 |
| Triple J Enterprises Ltd | Health & social care | 2012 |
| Triple One Estates Ltd | Real estate | 2023 |
| Tripsandtoursuk Ltd | Administrative & support | 2023 |
| Trisecure Service Ltd | Energy | 2025 |
| Trisk Property Development Ltd | Real estate | 2025 |
| Trisk Property Maintenance Ltd | Construction | 2023 |
| Tristone Capital Ltd | Professional & scientific | 2025 |
| Tristone Hospitality Ltd | Hospitality | 2025 |
| Tristrep Ltd | Administrative & support | 2024 |
| Trivora Solutions Ltd | Transport & logistics | 2026 |
| Trjp Investments Limited | Real estate | 2022 |
| TRK Windscreens Ltd | Wholesale & retail | 2026 |
| Trls Investments Limited | Real estate | 2018 |
| TRM Records Limited | Wholesale & retail | 2025 |
| Trmaz Healthcare Limited | Health & social care | 2021 |
| Trojan Martial Arts Academy (Staffordshire) Limited | Arts & recreation | 2023 |
| Trojan Martial Arts Academy Ltd | Arts & recreation | 2014 |
| Trompy Clean Limited | Transport & logistics | 2015 |
| Tropical Ice (England) Ltd | Wholesale & retail | 2016 |
| Tropical Ice Limited | Other services | 1998 |
| Troverem Ltd | Administrative & support | 2024 |
| Trovya Limited | Wholesale & retail | 2025 |
| Troys Tasty Caribbean Takeaway Ltd | Hospitality | 2019 |
| Trqberts Ltd | Construction | 2025 |
| TRS24/7 Limited | Wholesale & retail | 2021 |
| Tru-Thread Limited | Manufacturing | 1958 |
| Truck Response Ltd | Manufacturing | 2020 |
| Truckerpaul Services Ltd | Transport & logistics | 2015 |
| True Kitchen Walsall Limited | Hospitality | 2026 |
| True Path Healthcare Ltd | Health & social care | 2026 |
| True Quality Services Ltd | Administrative & support | 2013 |
| True Tasty Ltd | Hospitality | 2025 |
| True Trace Consulting Ltd | Other services | 2025 |
| True Voice Speech and Language Therapy Limited | Health & social care | 2018 |
| Trueform Beds Ltd | Manufacturing | 2026 |
| Truflow Hydraulic Components Limited | Wholesale & retail | 1986 |