| THE H Investment Group Ltd | Real estate | 2024 |
| THE Hub 175 Ltd | Administrative & support | 2023 |
| THE Isis Corporation Limited | Information & communication | 2008 |
| THE Kebab Station Ltd | Hospitality | 2019 |
| THE Lash Tech & Aesthetics Ltd | Other services | 2023 |
| THE London Boiler Specialist Limited | Construction | 2025 |
| THE Marks Brothers Limited | Construction | 2018 |
| THE Mobile Beauty Clinic Limited | Information & communication | 2021 |
| THE Moss MEN London Ltd | Professional & scientific | 2026 |
| THE Point Design Partnership Limited | Construction | 2003 |
| THE Priory Management Company (Worcester Park) Limited | Other services | 1997 |
| THE Retro Nest Ltd | Wholesale & retail | 2025 |
| THE Sound Viking Ltd | Information & communication | 2022 |
| THE Stables Worcester Park Ltd | Households | 2024 |
| THE Stars Childcare Group Limited | Health & social care | 2002 |
| THE Tuesday Wine Company Ltd | Manufacturing | 2020 |
| THE Valentine Group Holdings Limited | Real estate | 2018 |
| THE Valentine Group Limited | Real estate | 2002 |
| THE Vanni Estates Ltd | Real estate | 2023 |
| THE Willow Tree 2023 Ltd | Hospitality | 2023 |
| THE Woodway Gate Management Company NO.3 Limited | Hospitality | 2005 |
| Thedatatrail Ltd | Information & communication | 2024 |
| Thunder and Little Ltd | Manufacturing | 2019 |
| TID Construction Limited | Construction | 2018 |
| Tiger Mule Ltd. | Hospitality | 2008 |
| Tilly and Tojo Ltd | Wholesale & retail | 2021 |
| Tilt Solar Ltd | Construction | 2023 |
| Tinker Properties Limited | Real estate | 2026 |
| TLC Developers Limited | Construction | 2024 |
| TMC Services Property Maintenance Ltd | Construction | 2014 |
| TMJ and Sleep Therapy Centre of London Ltd | Health & social care | 2015 |
| TN DRY Cleaners Ltd | Other services | 2024 |
| TNR Hospitality Ltd | Administrative & support | 2022 |
| Todor Ltd | Wholesale & retail | 2023 |
| TOM West Consulting Ltd | Professional & scientific | 2020 |
| Tones III Limited | Hospitality | 2024 |
| Top Star Construction Limited | Construction | 2015 |
| Top Star Properties Limited | Real estate | 2024 |
| Torre Holdings Ltd | Real estate | 2024 |
| Touring Highlights Ltd | Professional & scientific | 2021 |
| Tower Hill Clinic Ltd | Other services | 2024 |
| Traditional UK Turkish Barbers Ltd | Other services | 2022 |
| Transcraft Properties Limited | Real estate | 2013 |
| Transcraft Trading Ltd | Information & communication | 2003 |
| Travel Retail Awards Limited | Extraterritorial | 2022 |
| Travel Retail Consumer Forum Limited | Professional & scientific | 2022 |
| Travel Retail Sustainability Forum Limited | Extraterritorial | 2022 |
| Trbusiness Limited | Administrative & support | 1997 |
| Trbusiness Publications Limited | Other services | 2018 |
| Tribeka (Lond) Ltd | Hospitality | 2022 |
| Trinity Care at Home Ltd | Health & social care | 2009 |
| Trinity Homecare Group Ltd | Health & social care | 2012 |
| Trinity Homecare Limited | Administrative & support | 1996 |
| True Quality Foods Limited | Hospitality | 2025 |
| TSA Optical Ltd | Public administration | 2023 |
| TSS Professionals Ltd | Professional & scientific | 2022 |
| Tudor BEC Limited | Education | 2007 |
| Tumble Films Ltd | Professional & scientific | 2024 |
| Tutor HUT Ltd | Education | 2020 |
| Twentytwo Communications Limited | Professional & scientific | 2008 |
| UBH Capital Ltd | Professional & scientific | 2021 |
| UBH Structures Ltd | Professional & scientific | 2020 |
| UCS Services Limited | Wholesale & retail | 2016 |
| Uiot Ltd | Information & communication | 2015 |
| UK & C Group LLP | | 2012 |
| UK Fire Cert Limited | Construction | 2025 |
| UK Imperial Limited | Wholesale & retail | 2013 |
| UKO International Ltd | Wholesale & retail | 2017 |
| Ukuhak.Com Limited | Education | 2008 |
| Ukuphela Ltd | Professional & scientific | 2012 |
| Ukyhands Ltd | Construction | 2025 |
| ULA Property Management Ltd | Real estate | 2025 |
| Ultimate Revision Limited | Education | 2020 |
| Ultra Smart Scaffolding Ltd | Construction | 2019 |
| Unicorn Services Group Ltd | Administrative & support | 2022 |
| Unique Counselling Limited | Health & social care | 2025 |
| Universal Design and Build Ltd | Construction | 2021 |
| Universal Homes London Ltd | Construction | 2025 |
| Unleash Business Solutions Ltd | Education | 2018 |
| Unleash Morden Ltd | Education | 2018 |
| Unleash Self Defence Ltd | Education | 2024 |
| Unleash Worcester Park Ltd | Education | 2018 |
| Unsueño Ltd | Wholesale & retail | 2023 |
| Urban Wild Trading Ltd | Wholesale & retail | 2024 |
| Valor Club Ltd | Wholesale & retail | 2024 |
| Vanessa Realestate Ltd | Real estate | 2025 |
| Vasudha IT Consulting Ltd | Information & communication | 2024 |
| Vbmc Ltd | Other services | 2024 |
| VE Supreme Force Ltd | Construction | 2023 |
| Veer Softwares Limited | Information & communication | 2016 |
| Velamobile Ltd | Wholesale & retail | 2025 |
| Velgan Ltd | Health & social care | 2025 |
| Velovan Fit Ltd | Manufacturing | 2025 |
| Venator Partners Ltd | Administrative & support | 2026 |
| Vend Direct Ltd | Professional & scientific | 2004 |
| Venturous Education Limited | Education | 2024 |
| Verex Ltd. | Information & communication | 2025 |
| Vergent Psychological Assessments Ltd | Health & social care | 2024 |
| Verona Pizza Ltd | Hospitality | 2024 |
| Very Good at IT Ltd. | Information & communication | 2015 |