| TAM Interior Ltd | Manufacturing | 2025 |
| Tamaaz Corporation Limited | Wholesale & retail | 2025 |
| Tamil Museum London | Arts & recreation | 2019 |
| Tamleni Jewellers Limited | Wholesale & retail | 2024 |
| Tamleni Supermarket Ltd | Wholesale & retail | 2016 |
| TAN Trade Ltd | Construction | 2026 |
| Tanainent Global UK Ltd | Information & communication | 2024 |
| Tandoori Chai Ltd | Extraterritorial | 2022 |
| Tandoori Haveli Ltd | Hospitality | 2025 |
| Tangled Twig Studio Ltd | Wholesale & retail | 2025 |
| Tanish Limited | Wholesale & retail | 2019 |
| Tanisha Enterprises Ltd | Transport & logistics | 2024 |
| Tanu's Kitchen Limited | Hospitality | 2018 |
| Tanv Care Limited | Health & social care | 2020 |
| Tanveen Enterprises Ltd | Wholesale & retail | 2024 |
| Tanvir Investments Ltd | Real estate | 2024 |
| Tanzu Limited | Real estate | 2024 |
| Tara Thames Valley Ltd | Real estate | 2022 |
| Taran Homes Ltd | Real estate | 2021 |
| Taran Investments (London) Limited | Real estate | 2016 |
| Taranaish Services Ltd | Other services | 2024 |
| Tarantino Partners & Co. Ltd | Professional & scientific | 2019 |
| Tariq Choudhry & Co. Ltd. | Professional & scientific | 2005 |
| Tashitech Ltd | Manufacturing | 2013 |
| Tashveen Clothing Limited | Wholesale & retail | 2022 |
| Taste of Pakistan Southall Ltd | Hospitality | 2026 |
| Tasty Affairs Ltd | Wholesale & retail | 2024 |
| Taswiq Ltd | Professional & scientific | 2025 |
| Tax on Track Accountancy Ltd | Professional & scientific | 2018 |
| Taxfix Accountants Ltd | Professional & scientific | 2025 |
| Taxpack Ltd | Professional & scientific | 2024 |
| Tayyab High Quality Printer Ltd | Professional & scientific | 2023 |
| TB Sellers Ltd | Wholesale & retail | 2025 |
| TB Tuned Ltd | Information & communication | 2025 |
| TCA Consulting Limited | Information & communication | 2020 |
| Td-Lte Limited | Wholesale & retail | 2024 |
| Tealstone Group Limited | Construction | 2017 |
| Team Aviation Ltd | Other services | 2017 |
| Tech Asees Ltd | Water & waste | 2025 |
| Tech Bolt Ltd | Wholesale & retail | 2025 |
| Tech Compute Ltd | Wholesale & retail | 2019 |
| Tech Driving Ltd | Transport & logistics | 2020 |
| Tech Kartel Ltd | Wholesale & retail | 2026 |
| Tech-Epoch Mobile Solutions Ltd | Information & communication | 2011 |
| TECH2SOLUTIONS Limited | Professional & scientific | 2025 |
| Techcirrus Ltd | Information & communication | 2022 |
| Techeye World Limited | Other services | 2018 |
| Techmatron Ltd | Information & communication | 2021 |
| Techminds Consultancy Services Limited | Information & communication | 2025 |
| Techno Loop Ltd | Wholesale & retail | 2025 |
| Techno-Med TG Ltd | Administrative & support | 2025 |
| Technolect Limited | Information & communication | 2024 |
| Technomine Business Services Ltd | Administrative & support | 2013 |
| Techora IT Ltd | Information & communication | 2026 |
| Techwave Technologies UK Ltd | Information & communication | 2023 |
| Teckno World Ltd | Information & communication | 2021 |
| TEG Construction & Carpet Ltd | Construction | 2025 |
| Tegma UK Ltd | Wholesale & retail | 2022 |
| Tegnur Food Limited | Hospitality | 2018 |
| Tejpal Ltd | Construction | 2020 |
| TEK Design & Build Limited | Construction | 2023 |
| Tekrex Ltd | Wholesale & retail | 2023 |
| Teleappointing UK Limited | Administrative & support | 2017 |
| Telford Cleaners Limited | Other services | 1998 |
| Telford Supermarket Limited | Wholesale & retail | 2005 |
| TEN Time Investments Ltd | Professional & scientific | 2021 |
| Tentelow Gardens Management Company Limited | Households | 2012 |
| Tera Shukar Limited | Real estate | 2020 |
| Teri Meri Biryani Limited | Hospitality | 2024 |
| Terra Firme Limited | Professional & scientific | 2025 |
| Teru Limited | Real estate | 2025 |
| Tesa Transport Ltd | Transport & logistics | 2015 |
| TFC Chicken and Pizza Ltd | Hospitality | 2021 |
| TG Group of Companies Limited | Financial services | 2022 |
| TGG Construction Ltd | Construction | 2023 |
| Thai Therapy Limited | Other services | 2008 |
| Thakar Associates Ltd | Professional & scientific | 2026 |
| Thakar Commercial Ltd | Real estate | 2024 |
| Thakar Supermarket Ltd | Wholesale & retail | 2023 |
| Thakral (UK) Limited | Wholesale & retail | 2005 |
| Thakrar Properties Investment Ltd | Real estate | 2026 |
| Thakrar Property Partnership LLP | | 2024 |
| Thakur Beauty Solutions Ltd | Other services | 2025 |
| Thakurain Express & Moovers Ltd | Transport & logistics | 2025 |
| Thame Property Investment Limited | Real estate | 2023 |
| Thames Transport Limited | Information & communication | 2024 |
| Thandi Brickwork Limited | Construction | 2014 |
| Thandi Development Limited | Real estate | 2017 |
| Thanga Sea Food and Grocery Ltd | Wholesale & retail | 2015 |
| Thasolution Ltd | Other services | 2020 |
| Thatis Ltd | Hospitality | 2019 |
| THB Works Limited | Construction | 2025 |
| THE Ambassadors of Sound Limited | Other services | 2003 |
| THE Asian Health Agency | Health & social care | 1994 |
| THE Asian Women's Network | Health & social care | 2007 |
| THE B&Bb Services Ltd | Hospitality | 2025 |
| THE Bearded Plumbing Co Ltd | Construction | 2019 |
| THE Beauty Icon London Limited | Other services | 2022 |
| THE Best London Cleaning Service Limited | Administrative & support | 2025 |
| THE Best Wine Shop Ltd | Wholesale & retail | 2022 |