| THE Career DR Ltd | Education | 2020 |
| THE Design Studio London Limited | Wholesale & retail | 2014 |
| THE DMC Initiative Holdings Limited | Professional & scientific | 2013 |
| THE DMC Initiative Spain Limited | Real estate | 2013 |
| THE Girls Decorating Services Ltd | Construction | 2010 |
| THE Hair Extension Shop Ltd | Other services | 2024 |
| THE Human Lens Consulting Ltd | Professional & scientific | 2026 |
| THE Ingenious Loan Company Limited | Financial services | 2024 |
| THE Inside Storey Ltd | Wholesale & retail | 2020 |
| THE Insight House Ltd | Professional & scientific | 2006 |
| THE Knotweed Exterminator Ltd | Administrative & support | 2025 |
| THE Last Yard Limited | Wholesale & retail | 2014 |
| THE Little Heating Company Limited | Construction | 2018 |
| THE Little Picture Company London Limited | Wholesale & retail | 2009 |
| THE London Hand Clinic Ltd | Health & social care | 2003 |
| THE Mama ERA Limited | Wholesale & retail | 2025 |
| THE Manifest Creative Limited | Professional & scientific | 2022 |
| THE Middle House (Mayfield) Limited | Hospitality | 2017 |
| THE Muncies Mews Management Company Limited | Households | 1987 |
| THE ND Club Limited | Information & communication | 2025 |
| THE Nest Wellness Limited | Health & social care | 2026 |
| THE ONI Liquor Company Ltd | Professional & scientific | 2025 |
| THE OOZ Collective Ltd | Hospitality | 2020 |
| THE Ordinal Gallery Ltd | Information & communication | 2024 |
| THE Pitts Project Ltd | Health & social care | 2025 |
| THE Seed Coat Limited | Information & communication | 2011 |
| THE United Fitness Network Ltd | Arts & recreation | 2017 |
| THE Unknot Spot Ltd | Health & social care | 2025 |
| THE Wheel and Tyre Outlet Limited | Wholesale & retail | 2014 |
| THE Zensory Limited | Information & communication | 2021 |
| The-Rabbit-Hole Limited | Hospitality | 2025 |
| Thema Consultants Limited | Construction | 1995 |
| Theodore David Ltd | Construction | 2021 |
| THG Recruitment Limited | Administrative & support | 2021 |
| Thinkblend Limited | Administrative & support | 2025 |
| Third London Wall Consulting Limited | Professional & scientific | 2020 |
| Third London Wall Cost Consulting Ltd | Professional & scientific | 2021 |
| Third London Wall Time Management Limited | Professional & scientific | 2023 |
| Third Parole Limited | Extraterritorial | 2025 |
| Thompson Property Management Ltd | Households | 2022 |
| Thornbury Consulting Associates Ltd | Professional & scientific | 2025 |
| Three Peak Clothing Ltd | Wholesale & retail | 2024 |
| Three Pioneers Limited | Wholesale & retail | 2019 |
| Tillab Solutions Ltd | Financial services | 2013 |
| Tim's Construction Ltd | Construction | 2024 |
| Tim's Electrical Ltd | Construction | 2019 |
| Tim's Properties Ltd | Real estate | 2025 |
| Timberhill Dental Practice Limited | Health & social care | 2009 |
| Ting Xuan Limited | Hospitality | 2024 |
| Titsey Brewing Co. Limited | Manufacturing | 2018 |
| Titus Tutoring Ltd | Education | 2020 |
| TK SAJ Propco Ltd | Real estate | 2021 |
| TLM Building Services Limited | Construction | 2003 |
| Toddler Sense Bromley Limited | Education | 2018 |
| Tokyotoys UK Ltd | Wholesale & retail | 2018 |
| Tomollie Property Ltd | Real estate | 2024 |
| Top Boon Property Management Limited | Real estate | 2021 |
| Toplit Limited | Information & communication | 2012 |
| Topolino Catering Ltd | Hospitality | 2026 |
| Tori Jennings Marketing Ltd | Professional & scientific | 2024 |
| Toucan Homes Ltd | Real estate | 2020 |
| Trades by SK Ltd | Wholesale & retail | 2025 |
| Transport & Delivery Solutions Limited | Transport & logistics | 2010 |
| Trinity GEO Limited | Construction | 2023 |
| Trustbridge (UK) Limited | Information & communication | 2012 |
| Trustwell Recruitment Solutions Ltd | Administrative & support | 2025 |
| Tsing-Yi Investments Limited | Professional & scientific | 1994 |
| Twenty 20 Talent Ltd | Administrative & support | 2017 |
| Twinemanda Limited | Professional & scientific | 1975 |
| Twms Solutions Limited | Administrative & support | 2013 |
| Tyni Management Ltd | Real estate | 2025 |
| Tyrel Sergeant Limited | Real estate | 2024 |
| TZI Property Limited | Real estate | 2017 |
| UK DRY Cleaning Ltd | Administrative & support | 2024 |
| UK Real Estate Management Limited | Real estate | 2022 |
| Uncommon Friends Ltd | Information & communication | 2023 |
| Unicook Ltd | Manufacturing | 2006 |
| Uniq Management Services Limited | Construction | 2012 |
| Unique Founders Group Ltd | Financial services | 2026 |
| Universal Master Products Limited | Manufacturing | 1992 |
| UNM Ltd | Professional & scientific | 2012 |
| Untitled Tours Ltd | Arts & recreation | 2014 |
| Upton Prowse Ltd | Real estate | 2024 |
| Urban Issues London Limited | Other services | 2011 |
| Urquhart Malta Properties Limited | Real estate | 2026 |
| VB Conveyancing Limited | Professional & scientific | 2023 |
| Vehyster Limited | Wholesale & retail | 2009 |
| Ventoris Sports International Ltd | Professional & scientific | 2012 |
| Veridion Ltd | Financial services | 2024 |
| Vertex Properties Ltd | Real estate | 2020 |
| Vesta Urban Living Ltd | Real estate | 2025 |
| Victan Pro Limited | Construction | 2025 |
| Victory Path Ltd | Other services | 2025 |
| Vimaks Ltd. | Administrative & support | 2006 |
| Vine Inventories Ltd | Real estate | 2016 |
| Vinello Ltd | Wholesale & retail | 2022 |
| Viraj Property Investments Limited | Real estate | 2021 |
| Virtual Finance Training Limited | Education | 2020 |
| Virtulutions Limited | Information & communication | 2014 |
| Visum Property Management Limited | Real estate | 2016 |