| Tony Menzies Ltd | Construction | 2015 |
| Tony Warren Limited | Professional & scientific | 2007 |
| Toolzeno Ltd | Information & communication | 2026 |
| Toomey Broadcasting Limited | Information & communication | 2024 |
| Toor Bros Ltd | Transport & logistics | 2019 |
| Tooth Hub Ltd | Health & social care | 2023 |
| Top Choice INT Ltd | Wholesale & retail | 2015 |
| Top Clearance Solutions Ltd | Wholesale & retail | 2016 |
| Top Event Planners Ltd | Hospitality | 2025 |
| Top Gaff Ltd | Construction | 2017 |
| Top GUN Marketing Ltd | Information & communication | 2016 |
| Top of the Bill Limited | Arts & recreation | 2024 |
| Top Order Ltd | Wholesale & retail | 2024 |
| Top Style Roofing Ltd | Construction | 2023 |
| Top TEN Homes Ltd | Real estate | 2020 |
| Top TEN Properties Ltd | Real estate | 2019 |
| Top Tier Roofing Services Limited | Construction | 2025 |
| Top Wave Sail Coaching Limited | Education | 2019 |
| Top WOK Chinese Takeaway Ltd | Hospitality | 2025 |
| Topaz Medical Writing Limited | Professional & scientific | 2025 |
| Topdec Painting Contractors Limited | Construction | 2015 |
| Topdegree Ltd | Education | 2025 |
| Topfinish Supplies Limited | Wholesale & retail | 2026 |
| Topkapi Kebab Shop Ltd | Hospitality | 2020 |
| Topline Construction Services Limited | Construction | 2015 |
| Topper International Limited | Manufacturing | 1988 |
| Toproofers Ltd | Construction | 2017 |
| Tops Pizza Ashford Limited | Hospitality | 2025 |
| Topsy Tails Ltd | Other services | 2023 |
| Topterra Properties Ltd | Administrative & support | 2026 |
| Topways Homes Limited | Real estate | 2023 |
| Torah Security Limited | Administrative & support | 2019 |
| Toral Properties Limited | Real estate | 2018 |
| Toral Property Management Limited | Real estate | 2018 |
| Torchwear Limited | Wholesale & retail | 2022 |
| Torm Time Tech Ltd | Manufacturing | 2025 |
| Toro Communications Limited | Professional & scientific | 2018 |
| TOS Advisory Ltd | Other services | 2017 |
| Tososoza Ltd | Extraterritorial | 2012 |
| Total Administration (London) LLP | | 2020 |
| Total Communications (GB) Limited | Information & communication | 2003 |
| Total Computers International Limited | Information & communication | 2021 |
| Total Contracting Services Limited | Construction | 1998 |
| Total Orthopaedics (London) LLP | | 2016 |
| Total Pool Services Ltd | Administrative & support | 2016 |
| Total Property Maintenance & Landscapes Ltd | Other services | 2026 |
| Total Property Services (South East) Ltd | Real estate | 2021 |
| Total Security Management Limited | Administrative & support | 2014 |
| Total Tree Care & Landscaping Ltd | Agriculture & fishing | 2020 |
| Total Waste Control Ltd. | Water & waste | 2000 |
| Toucan-Uk Limited | Real estate | 2019 |
| Tower Loanco Limited | Administrative & support | 2020 |
| Towers School Academy Trust | Education | 2011 |
| Towers Tiny Tots | Education | 2007 |
| Towi SX Ltd | Administrative & support | 2026 |
| Town & City Walks Kent Ltd | Extraterritorial | 2012 |
| Town & Country Investments Limited | Construction | 1965 |
| Town Capital Limited | Administrative & support | 2023 |
| Town Creatives Limited | Professional & scientific | 2014 |
| Towner Finishes and Interiors Limited | Construction | 2025 |
| Towner Utilities Ltd | Professional & scientific | 2016 |
| Townland Store Ltd | Administrative & support | 2016 |
| Towntree PRE School Ltd | Education | 2004 |
| TOYS4U Ltd | Wholesale & retail | 2024 |
| TP Property Contractors Ltd | Construction | 2013 |
| TPC Property Limited | Construction | 2017 |
| TPF Amaryllis 1 Ltd | Real estate | 2024 |
| TPL Estates Ltd | Construction | 2018 |
| TPM Holdings Limited | Real estate | 2022 |
| TPQ Consultancy Ltd | Professional & scientific | 2011 |
| TQS SE Limited | Information & communication | 1992 |
| Tracey Nightingale United Care Ltd | Administrative & support | 2023 |
| Track Accountancy (AK) Ltd | Professional & scientific | 2007 |
| Track Accountancy Ltd | Administrative & support | 2017 |
| Track Group Business Services Ltd | Administrative & support | 2021 |
| Track Group Services Ltd | Administrative & support | 2018 |
| Track Therapies Ltd | Health & social care | 2017 |
| Tracomet Limited | Manufacturing | 1997 |
| Traction Imports Limited | Wholesale & retail | 2025 |
| Trade Aura Limited | Education | 2024 |
| Trademore Afro Foods Ltd | Wholesale & retail | 2025 |
| Trades and Labour Recruitment Limited | Professional & scientific | 1995 |
| Tradex Plus Ltd | Other services | 2002 |
| Trading Card Supplies Limited | Wholesale & retail | 2024 |
| Traditional Building & Joinery Services Ltd | Construction | 2011 |
| Traditional Thai Limited | Hospitality | 2025 |
| Tradpro Limited | Construction | 2025 |
| Trafalgar Tavern Hotel Lease Ltd | Hospitality | 2022 |
| Trafalgar Tavern Lease Limited | Real estate | 2012 |
| Traian Properties Limited | Real estate | 2001 |
| Train My Athlete Limited | Information & communication | 2015 |
| Train the Boys Initiative Ashford CIC | Education | 2026 |
| Trainor JIM Ltd | Manufacturing | 2018 |
| Tramarrs Consultancy Ltd | Professional & scientific | 2016 |
| Tranquil Services Limited | Wholesale & retail | 2025 |
| Tranquil Shores Care Limited | Health & social care | 2025 |
| Trans Direct Limited | Transport & logistics | 2010 |
| Transafrican Sky Ltd | Professional & scientific | 1990 |
| Transalexa Ltd | Transport & logistics | 2016 |
| Transcend London Limited | Health & social care | 2024 |