| Tubo Gift Shop Ltd | Wholesale & retail | 2019 |
| Tubular Scaffold Services Ltd | Construction | 2019 |
| Tudor Beams Ltd | Construction | 2024 |
| Tudor Jewellers Limited | Wholesale & retail | 2012 |
| Tudor Park (Oteley Road) Residents Management Company Limited | Households | 2020 |
| TUK Holdings Limited | Financial services | 2024 |
| TUK Rural Ltd | Professional & scientific | 2017 |
| Tulefi Ltd | Professional & scientific | 2019 |
| Tulipa's Kitchen Ltd | Manufacturing | 2024 |
| Tulsi Kandel Limited | Hospitality | 2023 |
| Tumaconnect Global Ltd | Transport & logistics | 2025 |
| Tumaini Properties Ltd | Real estate | 2023 |
| Tune Lifestyle Ltd | Wholesale & retail | 2025 |
| Tunni Limited | Wholesale & retail | 2013 |
| Tupton Holdings Limited | Construction | 2025 |
| Turaa Cold Foods Ltd | Hospitality | 2024 |
| Turaa Streatery Ltd | Hospitality | 2024 |
| Turbo Phones Limited | Information & communication | 2020 |
| Turbo Properties Limited | Real estate | 2024 |
| Turbomiles Driving School Ltd | Education | 2025 |
| Turfworks Groundcare Ltd | Construction | 2026 |
| Turing Logic Ltd | Information & communication | 2022 |
| Turmali Publishing Limited | Information & communication | 2004 |
| Turn the Key Ltd | Other services | 2018 |
| Turner C&I Ltd | Professional & scientific | 2021 |
| Turner Video Productions Ltd | Information & communication | 2022 |
| Turner Wall Architects Ltd | Professional & scientific | 2020 |
| Turning Dreams Ltd | Arts & recreation | 2024 |
| Turnkey Property Partners Ltd | Real estate | 2025 |
| Turnpike Catering Ltd | Hospitality | 2026 |
| Turnpike Holdings Ltd | Real estate | 2025 |
| Turnpike Property Services Ltd | Real estate | 2026 |
| Turnstone Grange (Congleton) Estate Management Company Limited | Households | 2019 |
| Turqi Ltd | Real estate | 2023 |
| Turquoise (Eco) Ltd | Agriculture & fishing | 2026 |
| Turquoise Kitchen (Derby) Limited | Hospitality | 2019 |
| Turtle & Peacock Investments Ltd | Real estate | 2015 |
| Tustins Limited | Construction | 1986 |
| Tutor ME (Derby) Ltd | Education | 2019 |
| Tutot Limited | Real estate | 2024 |
| Tvarditsa Ltd | Transport & logistics | 2024 |
| TVC Estate Ltd | Real estate | 2025 |
| TVC Investments Ltd | Real estate | 2016 |
| TWA Property Group Ltd | Real estate | 2025 |
| TWB Solutions UK Ltd | Manufacturing | 2026 |
| TWC System Solutions Ltd | Information & communication | 2018 |
| Tweedshot Limited | Professional & scientific | 2025 |
| Twells Property Ltd | Real estate | 2021 |
| Twelveten Procurement Limited | Professional & scientific | 2014 |
| TWENTY2 Retreats Ltd | Hospitality | 2024 |
| TWENTYEIGHT9 Limited | Real estate | 2023 |
| TWENTYONE23 Ltd | Construction | 2019 |
| Twentytwo Hair & Beauty Limited | Other services | 2009 |
| Twice Translated Ltd | Health & social care | 2025 |
| Twigg Home Ltd | Administrative & support | 2017 |
| Twin Energy Services Limited | Construction | 2025 |
| Twinbrett Ltd | Professional & scientific | 2019 |
| Twinny Ltd | Health & social care | 2019 |
| Twins Metal Fabrication Ltd | Manufacturing | 2025 |
| Twinscott Ltd | Professional & scientific | 2021 |
| Twinstone Properties Ltd | Real estate | 2026 |
| TWM Maintenance Solutions UK Ltd | Construction | 2026 |
| Two Friends A&A Ltd | Wholesale & retail | 2025 |
| Two Lani Ltd | Health & social care | 2019 |
| Two Oak Group Limited | Hospitality | 2022 |
| Two Orange Chairs Limited | Real estate | 2003 |
| Two SIX Holdings Ltd | Financial services | 2024 |
| Two Twenty Limited | Manufacturing | 2005 |
| Twohouses UK Limited | Information & communication | 2010 |
| Twotwenty Trustees Limited | Professional & scientific | 2023 |
| Twpcomposites Ltd | Manufacturing | 2025 |
| TWS Logistics Ltd | Wholesale & retail | 2024 |
| Twyford Care (Bradford) Ltd | Health & social care | 2026 |
| Twyford Care (Stoke) Ltd | Health & social care | 2026 |
| Twyford Care 1 Ltd | Health & social care | 2025 |
| Twyford Care 2 Ltd | Health & social care | 2025 |
| Twyford Care 3 Ltd | Health & social care | 2025 |
| Twyford Care Ltd | Health & social care | 2016 |
| TXH Motors Ltd | Wholesale & retail | 2022 |
| Txmk Limited | Professional & scientific | 2023 |
| TY Hame Estates Ltd | Real estate | 2022 |
| TY Nant Spring Water Limited | Extraterritorial | 2020 |
| Tyco Lets Ltd | Real estate | 2025 |
| Tyger Asset 1 (SPV) Ltd | Real estate | 2024 |
| Tyger Assets & Management Ltd | Real estate | 2023 |
| Tyler Hill Distributed Solutions Limited | Energy | 2021 |
| Tyler Hill Solar Limited | Professional & scientific | 2020 |
| Tyler Hill Ventures Limited | Financial services | 2015 |
| Tylers Takeout Limited | Hospitality | 2024 |
| Tylers Tea Rooms Limited | Hospitality | 2014 |
| TYM Designs & Consultancy Ltd | Administrative & support | 2017 |
| Tymitchell Limited | Arts & recreation | 2024 |
| Tynefield Care Limited | Health & social care | 1989 |
| Tynefield Holdings Limited | Real estate | 1983 |
| Tyson Formwork Limited | Construction | 2014 |
| Tytan Service Ltd | Transport & logistics | 2026 |
| Tyvern Healthcare Solutions Ltd | Health & social care | 2026 |
| Tyvro Global Ltd | Wholesale & retail | 2025 |
| Tzikas Construction Limited | Construction | 2024 |
| U K Sports Limited | Wholesale & retail | 2000 |