| THE Palmerini Group Ltd | Professional & scientific | 2022 |
| THE Party Lounge Limited | Extraterritorial | 2006 |
| THE Pet Penthouse Ltd | Wholesale & retail | 2023 |
| THE Pink Parachute Limited | Wholesale & retail | 2015 |
| THE Pool and Basement Company Ltd | Other services | 2014 |
| THE Ptech Group London Ltd | Construction | 2025 |
| THE Ptech Maintenace Ltd | Professional & scientific | 2024 |
| THE Redeemed Christian Church of GOD - the Chapel of Truth | Other services | 2011 |
| THE Sandwich Shop (Thurrock) Limited | Hospitality | 2006 |
| THE Sausage Cutty Sark Limited | Hospitality | 2024 |
| THE Sausage Festival Ltd | Hospitality | 2024 |
| THE Sausage Greenwich Ltd | Hospitality | 2023 |
| THE Sausage Partnership Ltd | Hospitality | 2024 |
| THE Secure Future Group Limited | Real estate | 2018 |
| THE Service Check Ltd | Information & communication | 2022 |
| THE Sigma Clinic Ltd | Other services | 2024 |
| THE Silk Skin Company Ltd | Other services | 2026 |
| THE Snow Company UK Limited | Other services | 2001 |
| THE Spawn Festival Limited | Extraterritorial | 2013 |
| THE Square (London) Ltd | Construction | 2014 |
| THE Stables (Southwold) Management Ltd | Households | 2020 |
| THE Sunday Menu Ltd | Hospitality | 2021 |
| THE TAN HUT Ltd | Other services | 2015 |
| THE Thames Building & Decorating Company Limited | Construction | 2014 |
| THE Thatched House Dental Practice Ltd | Health & social care | 2011 |
| THE Thelmas WMC C.I.C. | Arts & recreation | 2018 |
| THE Thermal Project Labs Ltd | Manufacturing | 2025 |
| THE Third Space Youth Community Interest Company | Education | 2023 |
| THE Three Bears Group Ltd | Real estate | 2025 |
| THE Vespa Club Limited | Other services | 2010 |
| THE Wellness Junction Limited | Health & social care | 2025 |
| THE White & Pilkington Property Company Limited | Real estate | 2016 |
| THE White Room Rehearsal Studios Limited | Arts & recreation | 2004 |
| THE Wholeness Project Ltd | Health & social care | 2026 |
| THE Windoor Repair Company Limited | Manufacturing | 2018 |
| THE YOU Clinic (Chiswick) Limited | Other services | 2012 |
| Thebodybar&Co Ltd | Other services | 2026 |
| Thebullybarnessex Ltd | Other services | 2023 |
| Thegallop Ltd | Administrative & support | 2022 |
| Theobald Construction Ltd | Construction | 2017 |
| Thepamperhouse Ltd | Other services | 2026 |
| Theydon Bois Pharmacy Limited | Wholesale & retail | 2002 |
| Theydon Homes Limited | Real estate | 2016 |
| Thiara Consultancy Limited | Professional & scientific | 2018 |
| Thind Developments Ltd | Real estate | 2009 |
| Thind Retail Ltd | Wholesale & retail | 2008 |
| Think Inside Development Services Ltd | Construction | 2024 |
| Think Inside Ltd | Construction | 2012 |
| Thinkingtensors Ltd | Information & communication | 2026 |
| Third Generation Property Services Ltd | Real estate | 2021 |
| Thomas and SON Traders Ltd | Construction | 2012 |
| Thomas James Rose Property Ltd | Real estate | 2021 |
| Thompson Patterson Graham Ltd | Real estate | 2020 |
| Thompson’S Renovations Ltd | Construction | 2023 |
| Thorne Interiors Limited | Construction | 2019 |
| Thornhill Property Services Ltd | Real estate | 2016 |
| Three Energy Control Ltd | Information & communication | 2010 |
| Thrive With Purpose Limited | Arts & recreation | 1990 |
| Thumbstoppers Limited | Professional & scientific | 2017 |
| Thumbstoppers Live Limited | Professional & scientific | 2025 |
| Thunder Team Ltd | Construction | 2023 |
| Thundersley Cleaning Services Ltd | Administrative & support | 2005 |
| Thymesheet Ltd | Information & communication | 2026 |
| TI22 Build Ltd | Construction | 2025 |
| Tianova Ltd | Wholesale & retail | 2025 |
| Tibicare Limited | Real estate | 2007 |
| Tickle Properties Limited | Real estate | 2019 |
| Tiger Rope Access Ltd | Administrative & support | 2021 |
| Tiger Software Engineering Ltd | Information & communication | 2018 |
| Tighten Ltd | Administrative & support | 2024 |
| Tigon Sports Limited | Wholesale & retail | 2011 |
| Tiktech Ltd | Professional & scientific | 2020 |
| Tilia Court Freehold Limited | Real estate | 2008 |
| Tiller Property Group Limited | Real estate | 2020 |
| Timbral Ltd. | Professional & scientific | 2016 |
| Timbral Technologies Limited | Other services | 2022 |
| Time & Money Consultancy Limited | Information & communication | 2009 |
| Time OUT Boxing (U.K.) Community Interest Company | Arts & recreation | 2026 |
| Time OUT Boxing Limited | Arts & recreation | 2024 |
| Timeless Accounting Ltd | Professional & scientific | 2020 |
| Timeless Touch by Sandy Ltd | Other services | 2025 |
| Timeplan Ventures Ltd | Education | 2019 |
| Timi and Co. Limited | Financial services | 2011 |
| Timmty Ltd | Health & social care | 2011 |
| Timset Ltd | Hospitality | 2010 |
| Timz Entertainment Limited | Arts & recreation | 2026 |
| Tiny's Group Ltd | Other services | 2023 |
| Tipples Winebar Ltd | Hospitality | 2025 |
| Tiptoes (Essex) Limited | Wholesale & retail | 2005 |
| Tiptree Facilitators Ltd | Manufacturing | 2016 |
| Tivoni Limited | Other services | 2016 |
| Tix-It (London) Ltd | Administrative & support | 2026 |
| TJ Financial Services Ltd | Professional & scientific | 2026 |
| TJ Whittakers Ltd | Construction | 2013 |
| TJ Williams Properties Ltd | Real estate | 2025 |
| Tjaart Schutte Limited | Health & social care | 2013 |
| TJR Ventilation Ltd | Construction | 2019 |
| TK Enterprise (Essex) Ltd | Hospitality | 2018 |
| TK Property Relocations Ltd | Hospitality | 2024 |
| TL Events Ltd | Professional & scientific | 2024 |