| Sysfotech UK Ltd | Information & communication | 2025 |
| Sysmind Limited | Other services | 2009 |
| T Slattery Utilities Ltd | Construction | 2023 |
| T&M Plumbers Limited | Construction | 2016 |
| T&S Linen Hire Ltd | Administrative & support | 2024 |
| T.H.A. Maintenance Ltd | Construction | 2023 |
| TA & S Property Management Ltd | Administrative & support | 2025 |
| Taaher Traders Ltd | Wholesale & retail | 2023 |
| Taass Properties Ltd | Real estate | 2025 |
| Tabkha Limited | Hospitality | 2025 |
| Tactical Delta Group Ltd | Wholesale & retail | 2025 |
| TAD Buildings Group Ltd | Construction | 2025 |
| TAI Luxe Ltd | Other services | 2018 |
| Tait Environmental Ltd | Construction | 2025 |
| Tait Results Ltd | Professional & scientific | 2026 |
| TAJ Aljamal Ltd | Manufacturing | 2025 |
| Tala Enterprise Ltd | Transport & logistics | 2024 |
| Tamang Samaj UK Ltd | Other services | 2006 |
| Tanishi Limited | Professional & scientific | 2011 |
| Tanjeena Beauty Parlour Ltd | Other services | 2013 |
| TAP & Torch Plumbing Ltd | Construction | 2025 |
| Tara Harka Properties Ltd | Real estate | 2023 |
| Tara's Beauty Ltd | Other services | 2013 |
| Tarahz Limited | Information & communication | 2016 |
| Taras Equity Ltd | Professional & scientific | 2023 |
| Taras Services Limited | Professional & scientific | 2009 |
| Target Ltd | Professional & scientific | 2026 |
| Tarnolech LLP | | 2020 |
| Tarnolech Property Ltd | Real estate | 2026 |
| TAS Team Ltd | Construction | 2023 |
| Task Training & Servicing Ltd | Manufacturing | 2025 |
| Taxeasy Limited | Professional & scientific | 2007 |
| Tbfehin Ltd | Administrative & support | 2018 |
| TC Renovation Ltd | Construction | 2016 |
| Team Network Corporation Ltd | Information & communication | 2023 |
| Tech Books Consulting Ltd | Information & communication | 2024 |
| Tech Expeditors Ltd | Information & communication | 2018 |
| Tech-Info Consultancy Ltd | Information & communication | 2010 |
| Technical Lite Ltd | Construction | 2018 |
| Techno Genio Ltd | Information & communication | 2017 |
| Techvu Ltd | Information & communication | 2026 |
| Tecrative Limited | Information & communication | 2025 |
| TEM & Ghas Limited | Education | 2019 |
| Tenda Hands Homecare Ltd | Other services | 2017 |
| Teper Properties Ltd | Real estate | 2025 |
| Teydi-S 2020 Ltd | Construction | 2020 |
| TFC Development Ltd | Administrative & support | 2023 |
| Tfnl Electrical Ltd | Construction | 2024 |
| TH London Serviced Apartment Limited | Real estate | 2024 |
| Thakuri and Sons Limited | Real estate | 2026 |
| Thambya Limited | Wholesale & retail | 2026 |
| Thava Mangalam Legal Services Ltd | Professional & scientific | 2022 |
| Thayil Limited | Real estate | 2025 |
| THE 110 UK Services Limited | Transport & logistics | 2016 |
| THE Alec Reed Academy | Education | 2002 |
| THE Bahari Group Ltd | Wholesale & retail | 2021 |
| THE Basilverse Limited | Health & social care | 2009 |
| THE Cave Snooker Ltd | Arts & recreation | 2023 |
| THE Codfather Worthing Ltd | Hospitality | 2025 |
| THE Desi Deli Ltd | Wholesale & retail | 2025 |
| THE Dominion Prosperity Company Ltd | Health & social care | 2013 |
| THE Dravids Retail Ltd | Wholesale & retail | 2024 |
| THE FAT Crab Group Limited | Professional & scientific | 2016 |
| THE FAT Crab Limited | Hospitality | 2014 |
| THE FAT Crab of Birmingham Ltd | Hospitality | 2026 |
| THE FAT Crab of Clapham Limited | Hospitality | 2019 |
| THE FAT Crab of Harrow Limited | Hospitality | 2015 |
| THE FAT Crab of Stratford Ltd | Hospitality | 2023 |
| THE Fine Jamaican Sauce.Co Limited | Manufacturing | 2023 |
| THE GAP Academy Ltd | Arts & recreation | 2019 |
| THE Golden Orbit Ltd | Information & communication | 2019 |
| THE Great Ebla Ltd | Wholesale & retail | 2021 |
| THE Happy Enterprise Holdings Limited | Information & communication | 2018 |
| THE Khurana Ventures Limited | Real estate | 2024 |
| THE Lightroom Studio Ltd | Professional & scientific | 2026 |
| THE Lock SM Ltd | Construction | 2026 |
| THE London & Country Victualler Limited | Extraterritorial | 1996 |
| THE Luxé Lounge London Limited | Other services | 2020 |
| THE Mamaa MIA Northolt Ltd | Hospitality | 2023 |
| THE Next Puzzle Ltd | Construction | 2022 |
| THE Nubian Studio Ltd | Wholesale & retail | 2020 |
| THE One Inclusion Hub CIC | Education | 2026 |
| THE Power of ZEN Ltd | Wholesale & retail | 2025 |
| THE Project Feel Good Group Ltd | Information & communication | 2024 |
| THE Recovery and Towing Ltd | Transport & logistics | 2024 |
| THE Redeemed Christian Church of GOD Vine Connections | Other services | 2019 |
| THE Roof Edge Limited | Construction | 2025 |
| THE S.B. Team Limited | Construction | 2006 |
| THE Spartanite Ltd | Other services | 2016 |
| THE Sultani Group Limited | Information & communication | 2015 |
| THE V Hotel Limited | Hospitality | 2020 |
| THE Waffle Company | | 2006 |
| THE Well-Life Collective CIC | Public administration | 2024 |
| THE Windows Group Ltd | Construction | 2018 |
| The-Rays Limited | Wholesale & retail | 2024 |
| Theboad Limited | Professional & scientific | 2021 |
| THECONN3CT Ltd | Hospitality | 2024 |
| Theproudlondon Limited | Wholesale & retail | 2020 |
| Thevi Property Management Limited | Real estate | 2017 |
| Thiiird World Limited | Arts & recreation | 2016 |