| TAN (L R) Limited | Hospitality | 2023 |
| TAN Tropez Dartford Ltd | Other services | 2023 |
| Tan'Gun Martial Arts Ltd | Arts & recreation | 2018 |
| Tanda XC Limited | Health & social care | 2016 |
| Tandhyajico Limited | Manufacturing | 2026 |
| Tangan PVT Ltd | Health & social care | 2025 |
| Tanjun Ltd | Wholesale & retail | 2018 |
| Tank-Club 1 Ltd | Education | 2025 |
| Tankhill Estates Ltd | Real estate | 2020 |
| Tanygraig Limited | Financial services | 2012 |
| TAP & Wagon Limited | Hospitality | 2024 |
| Target Everist Electrical Contractors Ltd | Construction | 2023 |
| Target Everist Ltd | Construction | 2021 |
| Target Healthcare International Limited | Wholesale & retail | 2009 |
| Tarifa Ltd | Hospitality | 2021 |
| Tarrin Limited | Other services | 2015 |
| Task Systems Limited | Manufacturing | 2006 |
| Tasted Ltd | Hospitality | 2011 |
| Tastefully YOU Aesthetics Ltd | Other services | 2024 |
| Tasty Treatz Ltd | Wholesale & retail | 2025 |
| Tatya Consultancy Services Limited | Information & communication | 2013 |
| Taucon Limited | Administrative & support | 2011 |
| TAV Construction Ltd | Construction | 2024 |
| TAV Properties Ltd | Real estate | 2024 |
| Tax & Restructuring Services Ltd | Financial services | 2020 |
| Taxation Made Easy Ltd | Professional & scientific | 2022 |
| TAY Consulting Limited | Professional & scientific | 2019 |
| Taylor Luxury Cleans Ltd | Administrative & support | 2026 |
| Taylor Made Couriers Limited | Transport & logistics | 2010 |
| Taylored Help Ltd | Administrative & support | 2018 |
| Taylors Servicing Ltd | Wholesale & retail | 2023 |
| Taymapp Limited | Households | 2021 |
| Taymill Building Engineering Services Limited | Construction | 2006 |
| Taystone Limited | Administrative & support | 2001 |
| TAZ Letting Ltd | Real estate | 2019 |
| TB Tech Solutions Ltd | Wholesale & retail | 2025 |
| TBC Healthcare Limited | Other services | 2009 |
| TBM Electrical Services Ltd | Construction | 2023 |
| TBS Specialist Care Ltd | Health & social care | 2025 |
| Tbsquare Consulting Limited | Professional & scientific | 2017 |
| Tcapitol Solutions Limited | Information & communication | 2013 |
| TCB Enterprises Ltd | Transport & logistics | 2024 |
| TD Global Network Service Provider Limited | Information & communication | 2016 |
| TDM Consultant Ltd | Real estate | 2019 |
| TDO Property Ventures Ltd | Real estate | 2025 |
| Team Manhattan Equestrian Ltd. | Arts & recreation | 2020 |
| TEAM4ASSETS Ltd | Real estate | 2023 |
| Teamserve Ltd | Information & communication | 2007 |
| Tearman Limited | Construction | 2016 |
| Tebbutts UK Limited | Construction | 2011 |
| Tech FIX & Trade Ltd | Manufacturing | 2024 |
| Tech OPS Consultancy Limited | Wholesale & retail | 2021 |
| Tech Talent Services Ltd | Administrative & support | 2026 |
| Techarge Limited | Information & communication | 2018 |
| Techblue Limited | Wholesale & retail | 2017 |
| Techbyai Limited | Information & communication | 2025 |
| Techcom Solutions Ltd | Transport & logistics | 2024 |
| Techdrone Limited | Information & communication | 2018 |
| Techlect Limited | Construction | 2020 |
| Technical Installation Solutions Ltd. | Construction | 2011 |
| Technical Solutions International Limited | Construction | 2019 |
| Technifyit Ltd | Information & communication | 2020 |
| Techpilot Innovations Ltd | Professional & scientific | 2025 |
| Techrite Ltd. | Professional & scientific | 2014 |
| Techtrain IT Ltd | Administrative & support | 2020 |
| Tecin 53 Ltd | Hospitality | 2025 |
| Tecina 53 Ltd | Hospitality | 2025 |
| TED Technical Services Limited | Construction | 2025 |
| Tee's African Cuisine Ltd | Hospitality | 2025 |
| Teeglo Ltd | Health & social care | 2025 |
| Teekhair Ltd | Other services | 2024 |
| Teephaddy Ltd | Information & communication | 2015 |
| Teephaddy Properties Limited | Real estate | 2022 |
| Tees Golf Lounge Ltd | Arts & recreation | 2025 |
| Teeth UK Ltd | Extraterritorial | 2006 |
| Teethcare Ltd | Extraterritorial | 2006 |
| Tefuk Ltd | Transport & logistics | 2020 |
| Tehila Assessments Limited | Health & social care | 2023 |
| Tekayan Ltd | Other services | 2025 |
| Tela & Diana Limited | Transport & logistics | 2018 |
| Telston Court Limited | Other services | 1977 |
| TEM Estates Limited | Real estate | 2025 |
| Temi - Babs UK Ltd | Health & social care | 2015 |
| Temp Personnel Limited | Administrative & support | 2020 |
| Temp Temp Ltd | Transport & logistics | 2015 |
| Temphill Ltd | Financial services | 2008 |
| Templar Construction, Plant & Training Ltd | Construction | 2018 |
| Temple Square Cafe Ltd | Hospitality | 2024 |
| TEN Kings Logistics Ltd | Transport & logistics | 2025 |
| Tender Sounds Ltd | Wholesale & retail | 2022 |
| Tendercare Kent Limited | Health & social care | 2024 |
| Tenkv Ltd | Professional & scientific | 2012 |
| Tenlink Limited | Professional & scientific | 2002 |
| Tentacle Hospitality Ltd | Hospitality | 2024 |
| Teodora Recovery Ltd | Construction | 2024 |
| TEQ Consult Limited | Construction | 2025 |
| Teradaf LLP | | 2025 |
| Tercare Ltd | Health & social care | 2020 |
| Terry Simmons Consultancy Ltd | Professional & scientific | 2025 |
| Tescan Properties Limited | Professional & scientific | 2005 |