| THE Kitchen HUT Limited | Wholesale & retail | 2016 |
| THE Ladder Back Down Ltd | Education | 2020 |
| THE Lift Plan App Ltd | Information & communication | 2021 |
| THE Lion of Judah Consultancy Ltd | Professional & scientific | 2019 |
| THE Miracle Design UK Ltd | Wholesale & retail | 2021 |
| THE Modern Therapist Ltd | Education | 2026 |
| THE New Stereotypes Ltd | Information & communication | 2025 |
| THE Notting Hill Music Group Limited | Professional & scientific | 1995 |
| THE Nucleus Café Dartford Ltd | Hospitality | 2025 |
| THE Only for Manufacturing Cosmetics for Others Ltd | Wholesale & retail | 2025 |
| THE Passenger Limited Ltd | Hospitality | 2024 |
| THE Pearl Table Ltd | Professional & scientific | 2025 |
| THE Plough and Harrow Ltd | Hospitality | 2022 |
| THE Property Bay Group Limited | Real estate | 2022 |
| THE RCO Group Limited | Information & communication | 2025 |
| THE Sandwich Place Limited | Hospitality | 2016 |
| THE Ship Management Ltd | Real estate | 2025 |
| THE Stunt Department Limited | Information & communication | 2009 |
| THE TCG DEN Ltd | Wholesale & retail | 2025 |
| THE WAX OUT Clinic Ltd | Health & social care | 2024 |
| THE White Shark Cafe Limited | Information & communication | 2026 |
| THE Wolf Grooming Room Ltd | Other services | 2024 |
| THE ZS Group Limited | Financial services | 2023 |
| Thecastlecomputing Limited | Professional & scientific | 2023 |
| Thelawrencewayfx Ltd | Financial services | 2025 |
| Theomnimarts Ltd | Wholesale & retail | 2026 |
| Theoo Proptech Innovations Limited | Information & communication | 2026 |
| Thind Brothers Limited | Real estate | 2019 |
| Thomas Young Carpentry Ltd | Manufacturing | 2022 |
| Three Woods Ltd | Wholesale & retail | 2024 |
| Tidy Theory UK Ltd | Wholesale & retail | 2026 |
| Tier Trading Limited | Financial services | 2013 |
| Tilcon Investments Limited | Professional & scientific | 2020 |
| Tile Style Ltd | Construction | 2025 |
| Time IS Money Enterprises Ltd. | Wholesale & retail | 2024 |
| Tinu Oaks Limited | Professional & scientific | 2013 |
| Tipsy Tikka Limited | Hospitality | 2026 |
| Tisume Ltd | Information & communication | 2023 |
| TJ Dunford Consultancy Ltd | Construction | 2022 |
| TJ Group of Companies Ltd | Extraterritorial | 2024 |
| TJ Welcome Solutions Limited | Real estate | 2019 |
| TJM Property Management Ltd | Real estate | 2024 |
| TL Clinical Research Ltd | Professional & scientific | 2026 |
| TLC Professional Services Ltd | Water & waste | 2024 |
| Tmkai Ltd | Hospitality | 2022 |
| TMS Build and Access Limited | Construction | 2024 |
| Toddler Town Adventures Ltd | Arts & recreation | 2025 |
| Toducon-Roya Limited | Arts & recreation | 2021 |
| Tonatoy Limited | Real estate | 2023 |
| Toni Plant Operator Ltd | Construction | 2021 |
| Tonnes Assess Ltd | Health & social care | 2018 |
| Tony Nails Limited | Other services | 2020 |
| Topdog Accountants Limited | Extraterritorial | 2020 |
| Torku Surveying Ltd | Professional & scientific | 2022 |
| Tosin Care Limited | Health & social care | 2025 |
| Toxs Technologies Ltd | Wholesale & retail | 2021 |
| TPL Autos Ltd | Wholesale & retail | 2021 |
| Trade Boss Ltd | Construction | 2023 |
| TRADE4WEB Limited | Information & communication | 2013 |
| Tradebleat Limited | Financial services | 2026 |
| Tradehubb UK Limited | Wholesale & retail | 2015 |
| Trading EXP Ltd | Wholesale & retail | 2023 |
| Transmart Limited | Professional & scientific | 2024 |
| Transmission Recordings Limited | Professional & scientific | 1994 |
| Trathare Limited | Transport & logistics | 1980 |
| Travelo World Ltd | Administrative & support | 2024 |
| Traxfit Ltd | Arts & recreation | 2020 |
| Trendora Group Limited | Wholesale & retail | 2026 |
| Treva Limited | Hospitality | 2023 |
| Trevia Traders Ltd | Wholesale & retail | 2025 |
| Trevor Ranger and Darren Kelly LLP | | 2023 |
| TRH Residential Ltd | Real estate | 2022 |
| Trinity Financial Limited | Professional & scientific | 2015 |
| Triple SD Properties Ltd | Real estate | 2026 |
| Triple-A Labs Ltd | Information & communication | 2025 |
| Triton in the Community CIC | Education | 2023 |
| Tropical Vibez Ltd | Information & communication | 2023 |
| True Waves Group Company Ltd | Wholesale & retail | 2025 |
| Truplus Ltd | Wholesale & retail | 2017 |
| Truth Unlocked Limited | Administrative & support | 2023 |
| Tthairbarldn Ltd | Other services | 2025 |
| TTL Welling Nail & Spa Limited | Other services | 2024 |
| TTO Care Services Ltd | Health & social care | 2018 |
| TU Casa Estates Ltd | Real estate | 2019 |
| Tunbridge Wells Business Services Limited | Real estate | 2015 |
| Tutall Ltd | Education | 2020 |
| Twinnie Consult Ltd | Real estate | 2017 |
| Two Eight Management Ltd | Professional & scientific | 2022 |
| Two Saints Group Ltd | Professional & scientific | 2023 |
| TXP MEP Ltd | Construction | 2025 |
| Ty-Dee Cleaning Services Ltd | Administrative & support | 2025 |
| UA Studios Ltd | Information & communication | 2023 |
| UF Works {UK} Ltd | Other services | 2019 |
| Uget Express Ltd | Transport & logistics | 2023 |
| UK Global Visa Hub Ltd | Other services | 2026 |
| UK Pasal Ltd | Wholesale & retail | 2019 |
| UK Premier Licensing Ltd | Professional & scientific | 2022 |
| Umuaka Welfare & Development Association Ltd | Other services | 2017 |
| Unchal Chanan Ltd | Extraterritorial | 2024 |
| Unchel Chanan Ltd | Extraterritorial | 2024 |