| TES Topco Limited | Financial services | 2018 |
| Tesdiff Ltd | Real estate | 2023 |
| Tesfaye Medical Services Limited | Health & social care | 2012 |
| Tesk Auto Parts Limited | Wholesale & retail | 2025 |
| Tessellate Square Limited | Real estate | 2013 |
| Test Creative Limited | Administrative & support | 2011 |
| TEW North West Limited | Real estate | 2015 |
| Texmo Blank Limited | Manufacturing | 2009 |
| Texmo Holdings Limited | Financial services | 2023 |
| Textocracy Ltd | Professional & scientific | 2015 |
| Tezik Power Ltd | Manufacturing | 2015 |
| TF Design Ltd | Other services | 2023 |
| TF Plastering and Damp Solutions Ltd | Administrative & support | 2017 |
| TFB Roofing Ltd | Construction | 2025 |
| TFC Property Group Ltd | Real estate | 2026 |
| TFF Tax Trustees Limited | Professional & scientific | 2022 |
| TFG Global Management Ltd | Professional & scientific | 2024 |
| TFS Holdco Limited | Financial services | 2021 |
| TFS Properties Ltd | Real estate | 2021 |
| TFU Associates Ltd | Health & social care | 2010 |
| TFU Ltd | Wholesale & retail | 2019 |
| TG Decorators Limited | Construction | 2022 |
| TGM Custom Golf Limited | Arts & recreation | 2003 |
| TGN Properties Ltd | Real estate | 2015 |
| TGS Haulage Limited | Transport & logistics | 2022 |
| TGT Retail Ltd | Wholesale & retail | 2024 |
| TGY Creative Ltd | Professional & scientific | 2024 |
| TGY Global Limited | Administrative & support | 2017 |
| TH Cleaning Services Ltd | Administrative & support | 2023 |
| TH Languages Ltd | Professional & scientific | 2009 |
| TH Lettings Ltd | Real estate | 2018 |
| TH Michaels (Construction) Limited | Construction | 2003 |
| TH Michaels (Holdings) Limited | Financial services | 2012 |
| TH Michaels Limited | Construction | 2018 |
| TH Plumbing & GAS Services Limited | Construction | 2022 |
| Thackray Investments Limited | Real estate | 2017 |
| Thai Dragon Salon & Spa Ltd | Other services | 2020 |
| Thai Ritual Ltd | Other services | 2026 |
| Thai Wellness & Spa Ltd | Health & social care | 2026 |
| Thakkolam Caters Ltd | Hospitality | 2025 |
| Thalassian Limited | Wholesale & retail | 2025 |
| Thames Health Care Limited | Health & social care | 2005 |
| Thames Homecare Services (North) Limited | Health & social care | 2014 |
| Thanh DAT Supermarket Ltd | Wholesale & retail | 2024 |
| That Finishing Touch Decorators Limited | Construction | 2016 |
| That Housing Company Limited | Real estate | 2014 |
| That Kick Ltd | Hospitality | 2024 |
| That Northern Fella Ltd | Construction | 2018 |
| That Silly Studio Limited | Information & communication | 2016 |
| That's Entertaining Ltd | Wholesale & retail | 2016 |
| Thatone Limited | Hospitality | 2011 |
| THC (Swanwick) Limited | Administrative & support | 2017 |
| THC Property Ltd | Real estate | 2004 |
| THE 16TH Century Coaching Inn Ltd | Hospitality | 2019 |
| THE 1ST Stop Marquee Stake House Ltd | Manufacturing | 2012 |
| THE 46 Wostenholm Road Management Company Limited | Real estate | 1993 |
| THE 5% Club Limited | Education | 2016 |
| THE 7 Day Sun Limited | Extraterritorial | 2011 |
| THE A4 Block Limited | Real estate | 2013 |
| THE Abbey Consulting Ltd | Health & social care | 2024 |
| THE Abbey Group UK Limited | Extraterritorial | 2006 |
| THE Abbeydale Sports Club Limited | Arts & recreation | 1911 |
| THE Academy E&C Ltd | Education | 2022 |
| THE Academy Tennis Limited | Arts & recreation | 2007 |
| THE Academy: S.P.A.C.E. Ltd | Education | 2022 |
| THE Active Business Network CIC | Administrative & support | 2026 |
| THE Advocacy Bridge CIC | Professional & scientific | 2025 |
| THE Alchemist Gallery Ltd | Wholesale & retail | 2024 |
| THE Alive Project Ltd | Arts & recreation | 2008 |
| THE Alma Mosborough Limited | Hospitality | 2023 |
| THE Anchor Bar & Restaurant Ltd | Hospitality | 2016 |
| THE Angel Spinkhill Community Interest Company | Other services | 2014 |
| THE Angular Recording Corporation Limited | Arts & recreation | 2007 |
| THE Apple Tree Centre (South Yorkshire) Limited | Health & social care | 2019 |
| THE Arcane Knowledge Centre Limited | Education | 2025 |
| THE Archer Court MGT Company Limited | Households | 2016 |
| THE Art of Experiment Ltd. | Construction | 2013 |
| THE Art of Illustration Limited | Arts & recreation | 2003 |
| THE Artisan PIE Company Ltd | Hospitality | 2026 |
| THE Arts Catalyst | Arts & recreation | 1994 |
| THE Arundel Emporium Limited | Wholesale & retail | 2025 |
| THE Association for Driving Licence Verification | Other services | 2014 |
| THE Association of Graduate Careers Advisory Services | Education | 1999 |
| THE Atlas Holding Company Limited | Administrative & support | 2005 |
| THE Auto Electrician Ltd | Wholesale & retail | 2025 |
| THE Back Room Agency Limited | Professional & scientific | 2016 |
| THE Baijiu Beer Company Limited | Wholesale & retail | 2016 |
| THE Balance Initiative CIC | Education | 2025 |
| THE Bare Project Ltd | Education | 2019 |
| THE Barefoot Clinic Ltd | Health & social care | 2025 |
| THE Baseline HQ Ltd | Education | 2025 |
| THE Basement Hair & Beauty Ltd | Other services | 2013 |
| THE Bath Hotel Ltd | Hospitality | 2022 |
| THE Baton of Hope Enterprises Limited | Education | 2025 |
| THE Baton of Hope UK Ltd | Other services | 2022 |
| THE Beauty DEN Limited | Other services | 2012 |
| THE Beauty Hub Clinic Limited | Other services | 2021 |
| THE Beauty Recluse Ltd | Information & communication | 2025 |
| THE Beauty Spot (Rotherham) Limited | Other services | 2003 |
| THE Beehive Coffee Lounge and Tea Room Ltd | Hospitality | 2024 |