| THE Woolwich Coffee Lounge LLP | | 2012 |
| THE Works Brickwork & Roofing Ltd | Construction | 2023 |
| THE Wraparound Club Ltd | Health & social care | 2025 |
| THE XP Club Ltd | Administrative & support | 2017 |
| THE Yard Dartford Ltd | Hospitality | 2026 |
| THE Zuit World Ltd | Wholesale & retail | 2026 |
| Thecherishbox Ltd | Wholesale & retail | 2026 |
| THECLUB22 Ltd | Administrative & support | 2025 |
| Thecueman Limited | Arts & recreation | 2022 |
| Theletterb Ltd | Health & social care | 2024 |
| Themis London Ltd | Wholesale & retail | 2017 |
| Themotorq Limited | Wholesale & retail | 2023 |
| Themustidiary Ltd | Professional & scientific | 2025 |
| Theorysound Music Limited | Information & communication | 2018 |
| Therapy Consult Ltd | Health & social care | 2024 |
| Thermopontel Ltd | Construction | 2022 |
| Thesis International Limited | Information & communication | 2005 |
| Thesublimegroup Ltd | Professional & scientific | 2019 |
| Thetechbrain Ltd | Information & communication | 2023 |
| Thiago's Toys Ltd | Manufacturing | 2023 |
| Thind Wine Merchants Limited | Wholesale & retail | 2006 |
| Think Like Your MAN Ltd | Education | 2026 |
| Third EYE IT Solutions Ltd | Information & communication | 2014 |
| THM Management Ltd | Professional & scientific | 2026 |
| Thomas Brennan Reads Limited | Administrative & support | 2018 |
| Thomas Church Interiors Limited | Manufacturing | 2015 |
| Thompson & Thompson Homes Ltd | Real estate | 2023 |
| Thor Builders Ltd | Construction | 2022 |
| Thorburn Property Consultants Ltd | Professional & scientific | 2005 |
| Thorne Cleaning Solutions Limited | Wholesale & retail | 2011 |
| Thorne Roofing Limited | Construction | 2012 |
| Thread Logics Ltd | Information & communication | 2023 |
| Three Arrows Partners Ltd | Real estate | 2024 |
| Three Moon's PVT Ltd | Wholesale & retail | 2023 |
| Three Oakley Limited | Health & social care | 2012 |
| Three T'S Catering Services Ltd | Hospitality | 2024 |
| Thripple a Limited | Wholesale & retail | 2025 |
| Thronegate Ltd | Construction | 2024 |
| Thurlow Electrical Services Ltd | Manufacturing | 2025 |
| Thyme Properties Ltd | Real estate | 2023 |
| Thyron Services Ltd | Administrative & support | 2019 |
| TI Commercial Consultants Ltd | Professional & scientific | 2025 |
| Tialis Essential IT Debt Limited | Information & communication | 2025 |
| Tialis Essential IT Investments Limited | Information & communication | 2025 |
| Tibbs Electrical Division Limited | Other services | 2017 |
| Tibbs Group Limited | Other services | 2017 |
| Tibro Properties Limited | Real estate | 2023 |
| Tibuq Limited | Administrative & support | 2016 |
| Tidystar Clean Services Ltd | Administrative & support | 2024 |
| TIE Consulting UK Limited | Professional & scientific | 2025 |
| Tier One Construction Ltd | Construction | 2023 |
| Tife Ltd | Real estate | 2020 |
| Tigeal Limited | Health & social care | 2024 |
| Til&M Limited | Construction | 2018 |
| Tilbury Sushi Ltd | Wholesale & retail | 2020 |
| Tilda Healthcare Ltd | Health & social care | 2018 |
| Tile Land Limited | Wholesale & retail | 2002 |
| Tile Palais Ltd | Construction | 2023 |
| Tile Village Orpington Ltd | Wholesale & retail | 2010 |
| Tiling and ALL Stone Installation Ltd | Construction | 2021 |
| TIM Red 5 Ltd | Financial services | 2012 |
| Tim's Accounts Practice Limited | Professional & scientific | 2017 |
| Tima Associate Limited | Wholesale & retail | 2025 |
| Tima Ventures Limited | Real estate | 2025 |
| Timchez Ltd | Professional & scientific | 2014 |
| Timcliffe Limited | Information & communication | 2024 |
| Time Amdx Ltd | Administrative & support | 2025 |
| Time Zone Training Services Ltd. | Administrative & support | 2013 |
| Timeline Athlete Ltd | Wholesale & retail | 2021 |
| Timtechville Ltd | Real estate | 2021 |
| Timtom Services UK Limited | Transport & logistics | 2024 |
| TIN House Gallery Ltd | Wholesale & retail | 2009 |
| TIN House Holdings Limited | Real estate | 2020 |
| TIN House Property Limited | Real estate | 2011 |
| Tinkr Ltd | Information & communication | 2023 |
| Tinwell Healthcare Limited | Health & social care | 2014 |
| TIP Top Trends Ltd | Wholesale & retail | 2025 |
| Tipavali Ltd | Health & social care | 2014 |
| TIS Electrical Ltd. | Extraterritorial | 2012 |
| Tishya Wellness Clubs Ltd | Arts & recreation | 2026 |
| Tisicom Ltd | Administrative & support | 2017 |
| Titan Asset Holdings Ltd | Real estate | 2026 |
| Titem Investment Ltd | Real estate | 2023 |
| Titemitoayo Limited | Health & social care | 2024 |
| TJ Capsule Impex Ltd | Wholesale & retail | 2020 |
| TJ Group Ltd | Administrative & support | 2025 |
| TJ2018 Ltd | Health & social care | 2025 |
| Tjay Consulting Ltd | Administrative & support | 2025 |
| TJD Electrical Ltd | Construction | 2021 |
| TJE Commercial GAS Ltd | Construction | 2026 |
| TK Electric & Electronic Ltd | Manufacturing | 2020 |
| TK Partners Limited | Professional & scientific | 2025 |
| TKR Trading Limited | Wholesale & retail | 2026 |
| TLC Property (Sussex) Ltd | Real estate | 2022 |
| TLI Group UK Ltd | Manufacturing | 2012 |
| Tlsa Limited | Administrative & support | 2023 |
| TLT Blessings World Limited | Health & social care | 2019 |
| TM Facilities Ltd | Other services | 2026 |
| TMA Performance Academy Ltd | Arts & recreation | 2025 |
| TMB Estate Consultancy Ltd | Other services | 2003 |