| Tea Legends Cambridge Limited | Hospitality | 2024 |
| Tea Legends Management Limited | Professional & scientific | 2024 |
| Team Heroes Ltd | Administrative & support | 2021 |
| TEC Garden Limited | Administrative & support | 2021 |
| Technical Landscapes Limited | Administrative & support | 2021 |
| Technical Services Innovation Group Ltd | Financial services | 2015 |
| Techvision Consulting Ltd | Information & communication | 2009 |
| Techvision Property Services Limited | Information & communication | 2025 |
| Techybear Ltd | Information & communication | 2013 |
| Temple Trustees Limited | Professional & scientific | 2016 |
| Tender Tree Ltd | Other services | 2018 |
| Tennis Data Innovations (UK) Limited | Financial services | 2020 |
| Tennis Data Innovations Database (UK) Limited | Information & communication | 2020 |
| Tennis Data Innovations Operations (UK) Limited | Information & communication | 2020 |
| Tennis Data Innovations Streaming (UK) Limited | Information & communication | 2020 |
| Terra Ferma Media Limited | Professional & scientific | 2011 |
| Thai Charms Limited | Health & social care | 2008 |
| Thalirkal Limited | Health & social care | 2016 |
| Thames Valley Services Limited | Other services | 1965 |
| Thans Limited | Transport & logistics | 2011 |
| THE ALL England Lawn Tennis & Croquet Club Limited | Arts & recreation | 2011 |
| THE ALL England Lawn Tennis Club (Championships) Limited | Arts & recreation | 2011 |
| THE British Open Brass Band Championship Limited | Other services | 1989 |
| THE Creative Coaching LAB Limited | Professional & scientific | 2007 |
| THE Finishing Touch DRY Cleaners Limited | Other services | 2015 |
| THE Firecracker Group Ltd | Administrative & support | 2018 |
| THE Football Paper Ltd | Information & communication | 2006 |
| THE Four Forks Ltd | Wholesale & retail | 2025 |
| THE Grange (Kenley) Management Company Limited | Households | 2023 |
| THE Hopkins Shop LLP | | 2012 |
| THE Italian Kitchen Ltd | Hospitality | 2008 |
| THE League Paper Ltd | Information & communication | 2009 |
| THE London Chimney Sweeps Limited | Administrative & support | 2013 |
| THE London Consultany Ltd | Information & communication | 2026 |
| THE London Flue Lining Company Limited | Construction | 2016 |
| THE Malcolm Lodge Management Company Limited | Households | 1997 |
| THE Pavilion SW20 Limited | Arts & recreation | 2022 |
| THE Pelican Nursery Limited | Health & social care | 2012 |
| THE Pregnancy LAB Limited | Other services | 2015 |
| THE Wimbledon Brewery Company Limited | Manufacturing | 2013 |
| THE Wimbledon Foundation | Arts & recreation | 2013 |
| THE Wimbledon Group Limited | Financial services | 2017 |
| THE Wimbledon Park Golf Club | Extraterritorial | 1948 |
| Theflyingpanda Ltd | Administrative & support | 2024 |
| Theflyingpanda Services Ltd | Administrative & support | 2025 |
| Thermal Protection & Controls Limited | Wholesale & retail | 2010 |
| Thiseldo Ltd | Professional & scientific | 2018 |
| Thorough Space Ltd | Real estate | 2022 |
| Three Lodge Ltd | Real estate | 2025 |
| Thrive Doctor Limited | Health & social care | 2024 |
| Tigermonkey Investments Limited | Financial services | 2018 |
| Time Sleuths Limited | Other services | 2015 |
| Tina Flatau Limited | Professional & scientific | 2000 |
| TMA Global Consulting Limited | Professional & scientific | 2018 |
| Tnod Limited | Hospitality | 2004 |
| Tokia Square Management Ltd | Professional & scientific | 2025 |
| Tokia Square Service Limited | Hospitality | 2024 |
| Tokia Square Trading Ltd | Professional & scientific | 2025 |
| TOM Morris (Butchers) Limited | Real estate | 1946 |
| Toronto Investments Ltd | Real estate | 2023 |
| Tranmere Limited | Real estate | 2009 |
| Trans Holdings Limited | Professional & scientific | 1993 |
| Transair (UK) Limited | Wholesale & retail | 1987 |
| Tribes LOS Digitalis Ltd | Professional & scientific | 2019 |
| Trident Heating Services Limited | | 1981 |
| Trinity Capital Management Ltd | Real estate | 2010 |
| Trovecrest Limited | Households | 1981 |
| TSI Prop Co LLP | | 2023 |
| Tspl Associates Limited | Health & social care | 2010 |
| Tudo BEM Limited | Information & communication | 2025 |
| Tudor Office Supplies Limited | Professional & scientific | 1998 |
| TWENTY20 Digital Limited | Information & communication | 2012 |
| UK Ghost Limited | Financial services | 2022 |
| Ultimaspice Ltd | Wholesale & retail | 2014 |
| Ultra Space Ltd | Construction | 2023 |
| United Embroidery Company Limited | Real estate | 1985 |
| Unity Living Limited | Professional & scientific | 2019 |
| Uplifted Limited | Health & social care | 2019 |
| UR SAI Ltd | Health & social care | 2019 |
| Urban Traffic Ltd | Professional & scientific | 2018 |
| Vanessa Charest Aesthetic Limited | Health & social care | 2021 |
| Vape Licks Ltd | Wholesale & retail | 2022 |
| Venkatesa Inc Limited | Information & communication | 2015 |
| Vera Carter Communications Ltd | Professional & scientific | 2025 |
| Veranova 1 Ltd. | Financial services | 2022 |
| Veranova UK Holdco Ltd. | Financial services | 2022 |
| Versatile Global Ltd | Other services | 2014 |
| Videra Big Data Solutions Limited | Information & communication | 2015 |
| Vinkar Limited | Professional & scientific | 2015 |
| Visage Beauty& Aesthetics Studio Ltd | Other services | 2025 |
| Vital Phase UK Limited | Information & communication | 2001 |
| Vitality in Eden Global Ltd | Health & social care | 2025 |
| Viva-Media.London Limited | Professional & scientific | 2015 |
| Vivayaan Health Care Limited | Health & social care | 2024 |
| Vpsp Limited | Hospitality | 2008 |
| VU Beaute Clinic Ltd | Other services | 2024 |
| W.Thomas Restorations Limited | Manufacturing | 1959 |
| Wardyyycards Limited | Wholesale & retail | 2026 |
| Warren Light Industries Limited | Manufacturing | 2011 |
| Weatherman Music Ltd | Information & communication | 2016 |