| Somaliland Society UK Ltd | Health & social care | 2021 |
| Spero IT Limited | Information & communication | 2015 |
| SSK Superstore Ltd | Wholesale & retail | 2017 |
| Stamford Road Limited | Real estate | 2014 |
| Stapleband Limited | Information & communication | 2009 |
| Stewart Renovations Limited | Real estate | 2018 |
| Studio 7 London Limited | Other services | 2022 |
| Synergy Contract Solutions Ltd | Construction | 2017 |
| T.P.N Retail Ltd | Wholesale & retail | 2022 |
| Tabaco Torcido Traders Limited | Extraterritorial | 1982 |
| TCL Networks Limited | Other services | 2014 |
| TD Heli Services Ltd | Transport & logistics | 2026 |
| Television in Europe Limited | Information & communication | 1983 |
| Templar Steele (Trust and Custody) Limited | Professional & scientific | 2015 |
| TFD Group Limited | Professional & scientific | 2023 |
| THE Arden PUB Group Ltd | Hospitality | 2024 |
| THE Drive Mansions Limited | Households | 2001 |
| THE Gentlemen's Grooming Ltd | Other services | 2016 |
| THE Mobile Communication (London) Limited | Wholesale & retail | 2010 |
| THE New Ionian Academy | Administrative & support | 2007 |
| THE Next PT Ltd | Education | 2022 |
| THE Social Hound Club Ltd | Other services | 2026 |
| THE Wrinkle DR Ltd | Other services | 2016 |
| Tollgate Homes Ltd | Construction | 2018 |
| Tongue LAB Europe Limited | Professional & scientific | 2012 |
| Tongue Laboratory Limited | Professional & scientific | 2010 |
| Trinity Real Estate Investments Ltd | Real estate | 2019 |
| Tropic Tobacco Company Limited | Extraterritorial | 1937 |
| Trustdepo Ltd | Information & communication | 2026 |
| Tysco Plumbing & Heating Ltd | Construction | 2015 |
| Ulysses Limited | Real estate | 2021 |
| Unbeaten Ltd | Manufacturing | 2025 |
| Vanston Drycleaners & Launderette Ltd | Other services | 2023 |
| Vendibles Ltd | Wholesale & retail | 2021 |
| Violet Labs Limited | Information & communication | 2026 |
| VR Motorcycles (SW6) Ltd | Wholesale & retail | 2025 |
| Walton Hardening Limited | Real estate | 1971 |
| Water Mains Engineering UK Ltd | Construction | 2025 |
| Wild Flower Groove Records Ltd | Arts & recreation | 2012 |
| Winser London Limited | Wholesale & retail | 2024 |
| Wolff Works Limited | Professional & scientific | 2014 |
| Wyfold Studios Management Limited | Households | 1988 |
| Yacht and Sea International Ltd | Transport & logistics | 2019 |
| Yoshi Properties Limited | Construction | 2011 |
| Yourbigday Limited | Information & communication | 2016 |
| Zufo Limited | Professional & scientific | 2012 |