| TIM Miller Economics Limited | Professional & scientific | 2014 |
| Timbre Studios Ltd | Information & communication | 2025 |
| Tinkerpot Grassy Limited | Households | 2020 |
| Tinkle (UK) Ltd | Professional & scientific | 2007 |
| Tinkle Care LLP | | 2011 |
| Tiny Foundations Ltd | Education | 2025 |
| Tiny House (Cabins) Limited | Construction | 2015 |
| Tipsy Macarons Limited | Hospitality | 2022 |
| Tiptree House Limited | Professional & scientific | 2012 |
| Titan Blast and Clean Ltd | Construction | 2025 |
| Titan Sentinel Security Ltd | Administrative & support | 2026 |
| TJD Plumbing Heating & GAS Ltd | Construction | 2012 |
| TJH Wealth Management Ltd | Financial services | 2014 |
| TJK Builders Ltd | Construction | 2014 |
| TJK Developments Kent Ltd | Construction | 2013 |
| TJK Holdings Kent Ltd | Construction | 2013 |
| TJK LTW Limited | Construction | 2021 |
| TJK Projects Limited | Construction | 2021 |
| TKG Design Ltd | Professional & scientific | 2024 |
| TLC Partners LLP | | 2026 |
| TMB Sourcing UK Ltd | Wholesale & retail | 2026 |
| TN14CARS Limited | Transport & logistics | 2023 |
| Toalster Properties Limited | Real estate | 2015 |
| Tobro LLP | | 2019 |
| Tofs at the Lake Limited | Hospitality | 2023 |
| Together Festival Limited | Arts & recreation | 2015 |
| Tojobe Ltd | Information & communication | 2019 |
| Tokai System Development Ltd | Professional & scientific | 2016 |
| Tolan Official Ltd | Wholesale & retail | 2026 |
| Tolley and Littlewood Limited | Construction | 1959 |
| Toma Enterprises Limited | Professional & scientific | 2001 |
| Tomlinson Designs Limited | Professional & scientific | 2011 |
| Tonbridge Old Fire Station Ltd | Hospitality | 2023 |
| Tony O'Driscoll Ltd | Professional & scientific | 2012 |
| Toomin Ltd | Information & communication | 2014 |
| Top Coat Sevenoaks Ltd | Construction | 2025 |
| Top Marble & Granite UK Ltd | Wholesale & retail | 2022 |
| Top Spot Fishing Ltd | Administrative & support | 2022 |
| Topsec Employment Services Limited | Administrative & support | 2010 |
| Toraguard Ltd | Information & communication | 2024 |
| Torasoft Property Limited | Real estate | 2016 |
| Torno Limited | Professional & scientific | 2002 |
| Tosign Limited | Professional & scientific | 2014 |
| Totachem Trading LLP | | 2021 |
| Total Carpet Solution Ltd | Construction | 2019 |
| Total Fitness Services Limited | Other services | 2002 |
| Total Support Ltd | Construction | 2005 |
| Totem Investments Limited | Real estate | 1999 |
| Totem Properties Limited | Manufacturing | 1987 |
| Totsteachers Limited | Education | 2018 |
| Tourrad Limited | Administrative & support | 2025 |
| Towcrest 2 Limited | Real estate | 2015 |
| Towcrest Limited | Construction | 1994 |
| Tower Bridge Square Management Company Limited | Households | 1985 |
| Tower Isle Consulting Ltd | Information & communication | 2025 |
| Tower Marketing and Sports Limited | Wholesale & retail | 2000 |
| Toy Central Limited | Wholesale & retail | 2013 |
| TP Partnership Ltd | Professional & scientific | 2024 |
| TPE Groundwork & Construction Ltd | Construction | 2020 |
| Trade Events Limited | Administrative & support | 2012 |
| Trade Toys Limited | Wholesale & retail | 2012 |
| Tradenest Global Ltd | Wholesale & retail | 2026 |
| Trader Secure Ltd | Information & communication | 2025 |
| Trading Univer$Ity Ltd | Professional & scientific | 2010 |
| Train Groups and Charters Ltd | Administrative & support | 2024 |
| Trak Limited | Manufacturing | 1994 |
| Tramutolese Motors Ltd | Wholesale & retail | 2019 |
| Tranquil Bathrooms Ltd | Construction | 2019 |
| Trans Comms AV Solutions Limited | Information & communication | 2017 |
| Trans Comms Connectivity Limited | Information & communication | 2015 |
| Trans Comms Limited | Construction | 2004 |
| Trans Global Chartering Limited | Transport & logistics | 1975 |
| Trans Global Projects Group Limited | Administrative & support | 1987 |
| Trans Global Projects Limited | Transport & logistics | 1984 |
| Transcendent Homes Limited | Real estate | 2019 |
| Transit 3 Consulting Limited | Professional & scientific | 2023 |
| Transpenta&Son Ltd | Transport & logistics | 2022 |
| Transterra House Limited | Construction | 2025 |
| Trav.Tech Limited | Administrative & support | 2016 |
| Travelling Wawa Ltd | Administrative & support | 2024 |
| Treasured Build and Design Ltd | Construction | 2026 |
| Tree Craft Limited | Agriculture & fishing | 2005 |
| Tree Panda Ltd | Real estate | 2020 |
| Tree Services Limited | Agriculture & fishing | 2023 |
| Treeability Ltd | Agriculture & fishing | 2013 |
| Treescape Sevenoaks Ltd | Administrative & support | 2024 |
| Treetops Drive Limited | Households | 2017 |
| Treeview Developments (South East) Ltd | Construction | 2017 |
| Tregarth (Cardiff) LLP | | 2022 |
| Trendie Group Ltd | Information & communication | 2024 |
| Treoservice Ltd. | Information & communication | 2016 |
| Trevanion Developments Limited | Real estate | 1960 |
| Trevorrick Barn Limited | Real estate | 2026 |
| Trewble Limited | Financial services | 2023 |
| Tri-Metal Solutions Limited | Manufacturing | 2025 |
| Trianglz Limited | Information & communication | 2020 |
| Trianglz Venture Builder Limited | Information & communication | 2020 |
| Tribal PVT Ltd | Transport & logistics | 2017 |
| Tricon Management Limited | Real estate | 2025 |
| Tridom Ltd | Real estate | 2023 |