| Techno Securities Limited | Administrative & support | 2019 |
| Techno Talks LDN Ltd | Wholesale & retail | 2025 |
| Technobiz Barking Limited | Wholesale & retail | 2017 |
| Technofic LAB Ltd | Information & communication | 2024 |
| Technourish Ltd | Professional & scientific | 2025 |
| Technovaa Ltd | Information & communication | 2025 |
| Tecknology Trade Limited | Wholesale & retail | 2024 |
| TEE a Ltd | Health & social care | 2016 |
| Tefika Ltd | Construction | 2021 |
| Tegh Textiles Limited | Manufacturing | 2024 |
| TEK Dynamics Solutions Ltd | Information & communication | 2022 |
| TEK Rail Ltd | Construction | 2021 |
| Tekbits Limited | Information & communication | 2017 |
| Teknon Toogood Limited | Energy | 2017 |
| Tekzo UK Ltd | Wholesale & retail | 2025 |
| Telafrica Mobile Limited | Information & communication | 2026 |
| Telecom Outlet Ltd | Wholesale & retail | 2025 |
| Telecore Electronics Ltd | Wholesale & retail | 2026 |
| Telemerge UK Limited | Information & communication | 2024 |
| Telesol Limited | Administrative & support | 2024 |
| Telford Equestrian Enterprises Limited | Arts & recreation | 2012 |
| Telnet Global Services Limited | Information & communication | 2017 |
| Temir Ltd | Hospitality | 2017 |
| Temmy's Child Care Ltd | Health & social care | 2022 |
| Tempex Global Limited | Administrative & support | 2016 |
| Tender Labelle's Care - TLC Studio Ltd | Other services | 2024 |
| Tendora Ltd | Wholesale & retail | 2025 |
| Tengo Global Ltd | Real estate | 2014 |
| Teoclean Ltd | Administrative & support | 2019 |
| Teodorovi Transport Limited | Other services | 2019 |
| Testworks Global Ltd | Information & communication | 2025 |
| Tetacons Development Ltd | Professional & scientific | 2021 |
| Textile Home Limited | Wholesale & retail | 2017 |
| Textiles Recycling Ltd | Wholesale & retail | 2026 |
| Tgwd Ltd | Information & communication | 2014 |
| Th!Nk Media Limited | Manufacturing | 2025 |
| Thai Fighters London Ltd | Arts & recreation | 2025 |
| Thames & Newcastle (Consultancy) Limited | Construction | 2017 |
| Thames & Newcastle (Holdings) Ltd | Financial services | 2022 |
| Thames & Newcastle (Properties) Limited | Real estate | 2019 |
| Thames & Newcastle Limited | Construction | 2009 |
| Thames Aggregates Limited | Water & waste | 2013 |
| Thames House LLP | | 2007 |
| Thames Mortgage & Protection Ltd | Financial services | 2025 |
| Thames Mortgages Ltd | Financial services | 2017 |
| Thames Private Hire Limited | Transport & logistics | 2019 |
| Thames Recycling Limited | Water & waste | 2012 |
| Thames Side Car Doctor Ltd | Wholesale & retail | 2025 |
| Thames Side Properties Ltd | Real estate | 2025 |
| Thames View Chaii Ltd | Hospitality | 2024 |
| Thames View Welcome Store Ltd | Wholesale & retail | 2021 |
| Thames Ward Community Association Limited | Other services | 2011 |
| Thamesview Corporate Services Limited | Health & social care | 2021 |
| Thanh DAT Group Limited | Wholesale & retail | 2025 |
| Thanku Boutique Limited | Wholesale & retail | 2024 |
| That Event Works CIC | Arts & recreation | 2026 |
| THE 119 Edition Limited | Real estate | 2025 |
| THE Agricultural Corporation Ltd | Agriculture & fishing | 2017 |
| THE Ambitious Homes Ltd | Construction | 2020 |
| THE Barkery Ltd | Manufacturing | 2024 |
| THE Barking Plumber Ltd | Construction | 2025 |
| THE Basic Ecommerce and Investment Ltd | Wholesale & retail | 2024 |
| THE Beauty Sanctuary (Barking) Limited | Other services | 2008 |
| THE Big Makers Ltd | Construction | 2025 |
| THE Bollywood Post Limited | Information & communication | 2012 |
| THE Broken Briefcase Ltd | Administrative & support | 2026 |
| THE Browning Partnership LLP | | 2023 |
| THE Canopy Organisation Ltd | Health & social care | 2015 |
| THE Celestial Church of Christ Jehovah Eliyon Parish | Other services | 2006 |
| THE Client's Canvas Limited | Manufacturing | 2025 |
| THE Cloaked One Ltd | Wholesale & retail | 2022 |
| THE Cosbright Shipping Limited Partnership | | 2000 |
| THE Cosever Shipping Limited Partnership | | 2000 |
| THE Cosfair Shipping Limited Partnership | | 2000 |
| THE Cosforce Shipping Limited Partnership | | 2000 |
| THE Cosluck Shipping Limited Partnership | | 2000 |
| THE Costar Shipping Limited Partnership | | 2000 |
| THE Coswin Shipping Limited Partnership | | 2000 |
| THE Creative Avenue Ltd | Information & communication | 2025 |
| THE Daniel Bar and Cafe Ltd | Hospitality | 2016 |
| THE Drive Motors Ltd | Manufacturing | 2010 |
| THE DRY Cleaning Hub Ltd | Other services | 2023 |
| THE Earthy Crumb Ltd | Hospitality | 2025 |
| THE Educators London Ltd | Education | 2014 |
| THE Elite Prime Limited | Manufacturing | 2025 |
| THE G&K Group PVT Ltd | Financial services | 2024 |
| THE Genius Establishment Ltd | Information & communication | 2017 |
| THE Giving Mother Ltd | Health & social care | 2023 |
| THE Halal Meaters Limited | Hospitality | 2019 |
| THE Hawks Security Solutions Ltd | Administrative & support | 2015 |
| THE Hire Service Limited | Administrative & support | 2001 |
| THE Hydrangea Trading Company Ltd | Wholesale & retail | 2023 |
| THE Inkribbonpaper Company Ltd | Manufacturing | 2008 |
| THE Ivela Limited | Construction | 2024 |
| THE Khan's Restaurant Limited | Hospitality | 2017 |
| THE Light Legal Services Ltd | Professional & scientific | 2011 |
| THE Limiter of Sound Ltd | Information & communication | 2023 |
| THE London Coach Ltd | Professional & scientific | 2024 |
| THE Lotus Dream Ltd | Health & social care | 2022 |
| THE Lucky Inn Barking Ltd | Hospitality | 2024 |