| TIC Healthcare Limited | Health & social care | 2018 |
| Tienyi Ltd | Other services | 2016 |
| Tiger EYE Travel Ltd | Administrative & support | 2019 |
| Tiger PC Solutions Limited | Wholesale & retail | 2001 |
| Tiger Plant Holdings Ltd | Financial services | 2022 |
| Tiger Plant Ltd | Construction | 2016 |
| Tiger Star Limited | Wholesale & retail | 1997 |
| Tile Barn Management Company Limited | Households | 1980 |
| Tilford Village Shop Limited | Hospitality | 2018 |
| TIM Callaghan Ltd | Professional & scientific | 2021 |
| Timesquare Estates Limited | Real estate | 2002 |
| Timesquare Limited | Construction | 1993 |
| Titan Scaffolding Limited | Construction | 2015 |
| Titled Media Ltd | Professional & scientific | 2019 |
| TJ Beverages Limited | Wholesale & retail | 2007 |
| TJA Coaching Ltd | Arts & recreation | 2025 |
| TJM Financial Ltd | Financial services | 2017 |
| TL Johnson Property Ltd | Real estate | 2025 |
| Tlab Accountancy Ltd | Professional & scientific | 2011 |
| TLC Windows & Doors Ltd | Construction | 2025 |
| TLR Investments Limited | Households | 2007 |
| TLR Plumbing & Heating Limited | Construction | 2016 |
| TMC Supplies Limited | Wholesale & retail | 2023 |
| TMS Custom Ltd | Manufacturing | 2017 |
| TNC Holdings Limited | Professional & scientific | 2008 |
| TO YOU Loos Limited | Administrative & support | 2020 |
| Toad Haul Ltd | Transport & logistics | 2015 |
| Toastyloaf Limited | Information & communication | 2025 |
| Tobi Solutions Ltd | Professional & scientific | 2014 |
| Toffeetree Books Limited | Information & communication | 2025 |
| Toffeetree Limited | Professional & scientific | 2001 |
| TOG Taste of Germany Ltd | Hospitality | 2018 |
| Togail Developments Limited | Construction | 2026 |
| Tokenhouse Holdings Ltd | Arts & recreation | 2024 |
| Tolcarn International Limited | Real estate | 2001 |
| Toldue Limited | Real estate | 2019 |
| Toldue Property Holdings Limited | Real estate | 2022 |
| Tolyvera Ltd | Wholesale & retail | 2025 |
| Toma Concepts Limited | Information & communication | 2009 |
| Tompsett Limited | Information & communication | 2010 |
| Toolbox Systems Limited | Information & communication | 1996 |
| Toomey Scaffolding Ltd | Administrative & support | 2006 |
| Top 4 Security Ltd | Administrative & support | 2018 |
| Top Chef (Epsom) Limited | Hospitality | 2021 |
| Top Dog Supplies Ltd | Manufacturing | 2023 |
| Top Plasters Ltd | Construction | 2015 |
| Top Tiling (Surrey) Ltd | Construction | 2026 |
| Top Trim Tree Surgery Ltd | Agriculture & fishing | 2021 |
| Top UK Tour Ltd | Administrative & support | 2024 |
| Topspin Monkeys Limited | Arts & recreation | 2013 |
| TORKIS145 Ltd | Professional & scientific | 2021 |
| Torola Property Ltd | Real estate | 2019 |
| Tortech Projects Ltd | Construction | 2017 |
| Toshko Limited | Construction | 2010 |
| Toskov Ltd | Construction | 2022 |
| Total Contracts Epsom Limited | Construction | 2012 |
| Total Network Consulting Ltd | Information & communication | 2012 |
| Total Plumbing Services Limited | Wholesale & retail | 2026 |
| Total Taxi Transfers Ltd | Transport & logistics | 2019 |
| Totec Consulting Limited | Professional & scientific | 2010 |
| Toubkiss Consulting Limited | Professional & scientific | 2015 |
| Touch Clarity Solutions Ltd | Professional & scientific | 2018 |
| Touchdown TV Ltd | Information & communication | 2007 |
| Tour Tribe Limited | Administrative & support | 2025 |
| Tourfield Limited | Professional & scientific | 2026 |
| Tourism & Education UK Consulting Limited | Administrative & support | 2015 |
| Tower Asset Management Limited | Real estate | 2005 |
| Tower Demolition Limited | Construction | 2025 |
| Towergate Management (Witley) Limited | Real estate | 2003 |
| Townsend Mechanical Services Consultancy Limited | Wholesale & retail | 2012 |
| Townsend Security Installations Ltd | Construction | 2023 |
| Toyota Financial Services (UK) PLC | Financial services | 1988 |
| Toyota Services Limited | Information & communication | 1987 |
| Toyota(G.B.) PLC | Wholesale & retail | 1967 |
| Tpdi Limited | Information & communication | 2015 |
| Trackrme Ltd | Professional & scientific | 2025 |
| Trade Glass Direct Ltd | Construction | 2022 |
| Trade Smart Double Glazing Ltd | Construction | 2023 |
| Tradedock Limited | Financial services | 2017 |
| Trademark Properties Limited | Real estate | 2025 |
| Trademark Scaffolding Ltd | Construction | 2022 |
| Tradexecution Limited | Financial services | 2025 |
| Tradingasblueocean Ltd | Wholesale & retail | 2025 |
| Trafford Enterprises Limited | Other services | 2001 |
| Trafford Strategic Investments Ltd | Other services | 2024 |
| Trafford Uprospa Limited | Professional & scientific | 2011 |
| Trans-African Holdings Ltd | Professional & scientific | 2019 |
| Trans-Tek Limited | Professional & scientific | 1985 |
| Transcendent Developments Ltd | Construction | 2011 |
| Transformation London Ltd | Construction | 2014 |
| Transport and Environmental Policy Research Limited | Professional & scientific | 2009 |
| Transport UN Limited | Administrative & support | 2019 |
| Trash Wizard Ltd | Transport & logistics | 2023 |
| Trav N Go Ltd | Administrative & support | 2022 |
| Travel Safely Ltd | Transport & logistics | 2015 |
| Traynor Thomas Services Limited | Professional & scientific | 2014 |
| Treacle Office Services Limited | Professional & scientific | 2012 |
| Trece Engineering Ltd | Construction | 2021 |
| Treemasters Limited | Agriculture & fishing | 1996 |
| Treeon Ltd | Other services | 2011 |