| Taylor's Cards Limited | Wholesale & retail | 2012 |
| Tayron Services Ltd | Construction | 2014 |
| Taza Ltd | Real estate | 2017 |
| Tbig London Ltd | Wholesale & retail | 2022 |
| TBM Care Ltd | Public administration | 2026 |
| TC AAK Construction Ltd | Construction | 2023 |
| Tcarez Solution Limited | Administrative & support | 2019 |
| Tcrb Trans Ltd | Transport & logistics | 2019 |
| Team Blueprint CIC | Education | 2023 |
| Team Highness Limited | Administrative & support | 2026 |
| Team Warrior London Ltd | Administrative & support | 2017 |
| Techayz Limited | Professional & scientific | 2023 |
| Techbug Ltd | Extraterritorial | 2020 |
| Techmate IT Solutions Ltd | Information & communication | 2025 |
| Technical Cladding Installations Limited | Construction | 2018 |
| Technical Engineer Limited | Professional & scientific | 2025 |
| Technologic Ltd | Construction | 2014 |
| Techpark Inc. Ltd | Wholesale & retail | 2022 |
| Techport Ltd | Wholesale & retail | 2026 |
| Techstride Solutions Ltd | Information & communication | 2024 |
| Techvance Solutions Ltd | Information & communication | 2024 |
| Techxect Limited | Information & communication | 2016 |
| Techzay App Ltd | Information & communication | 2019 |
| TED Ball Hall Community Association | Other services | 2011 |
| TEDI2008 Limited | Water & waste | 2025 |
| TEE GEE Engineering Services Ltd | Construction | 2019 |
| Teedoesproperty Limited | Households | 2026 |
| Teesside Community Development Foundation | Education | 2024 |
| Teewhy Relaxation Homes Ltd | Real estate | 2024 |
| Teez Medical Services Limited | Health & social care | 2023 |
| Tejpal Construction Ltd Ltd | Construction | 2024 |
| Tekwire Ltd | Information & communication | 2023 |
| Telcol Global Ltd | Health & social care | 2020 |
| Telegia Associates Ltd | Health & social care | 2015 |
| Teleoptix UK Limited | Construction | 2025 |
| Tellus Ltd | Wholesale & retail | 2026 |
| Temi - Tayo Rides Ltd | Transport & logistics | 2026 |
| Temira Juicedit Ltd | Manufacturing | 2025 |
| Tempfad Services Ltd | Professional & scientific | 2014 |
| Temprance Limited | Professional & scientific | 2017 |
| Temrach Services Ltd | Transport & logistics | 2022 |
| Temson Drylining Finishing Ltd | Construction | 2023 |
| TEN Building Service Ltd | Construction | 2020 |
| TEN Plus One Ltd | Wholesale & retail | 2024 |
| Tenant Rent Account Limited | Real estate | 2022 |
| Tender Roots Children's Homes Ltd | Health & social care | 2025 |
| Tender Treats Ltd | Wholesale & retail | 2024 |
| TEO 2025 Ltd | Transport & logistics | 2025 |
| Teodor Rarinca Ltd | Wholesale & retail | 2025 |
| Tepu Trans Ltd | Transport & logistics | 2017 |
| Terrasure Solutions Ltd | Water & waste | 2025 |
| Tesmatt Ltd | Wholesale & retail | 2020 |
| Testtek Consult Limited | Information & communication | 2014 |
| Teutons Incorporation Ltd | Wholesale & retail | 2021 |
| Tezbee Trade UK Ltd | Other services | 2026 |
| Tfad Motors Limited | Wholesale & retail | 2025 |
| Tfcm Limited | Professional & scientific | 2025 |
| TFI Catering & Hire Services Ltd | Hospitality | 2024 |
| Tfrs Properties Ltd | Real estate | 2026 |
| TFT Collective UK Ltd | Wholesale & retail | 2020 |
| TFT Construction Ltd | Construction | 2015 |
| Tgam Investments Ltd | Real estate | 2023 |
| Tgemz Ltd | Wholesale & retail | 2019 |
| TGL Freights Limited | Transport & logistics | 2020 |
| Tgss Solutions Ltd | Health & social care | 2026 |
| TH3O Ltd | Transport & logistics | 2021 |
| Thames Recruitment Ltd | Hospitality | 2025 |
| Thames River Properties Ltd | Real estate | 2024 |
| Thapper Limited | Other services | 2023 |
| Thaqi Build Ltd | Construction | 2024 |
| THE 9N Innovations Ltd | Real estate | 2020 |
| THE Albright Services Limited | Hospitality | 2025 |
| THE Alliance 54 Ltd | Administrative & support | 2015 |
| THE ALP Properties Limited | Real estate | 2025 |
| THE Ambassadors World Ltd | Professional & scientific | 2023 |
| THE Ambrose OT Group Ltd | Public administration | 2022 |
| THE Apostolic Church Grammar School Old Student Association 77/79 UK Branch | Education | 2018 |
| THE Balti Cottage Restaurant Ltd | Hospitality | 2024 |
| THE Barking and Dagenham Progress Project | Other services | 2002 |
| THE Beauty Laboratory Ltd | Other services | 2021 |
| THE Beauty Suite Ltd | Other services | 2010 |
| THE Blue House Laundry Ltd | Extraterritorial | 2021 |
| THE Brazilian Post Limited | Manufacturing | 2010 |
| THE Bridge Accounts Ltd | Professional & scientific | 2023 |
| THE Build Base Construction Ltd | Construction | 2024 |
| THE Car Colony Ltd | Professional & scientific | 2023 |
| THE Chase Ballroom Events Ltd | Hospitality | 2025 |
| THE Christ Anointing Assembly (Restoration City) Limited | Other services | 2013 |
| THE Church of Pentecost - UK | Other services | 2008 |
| THE Community College CIC | Information & communication | 2024 |
| THE Concept Master Ltd | Education | 2023 |
| THE Crescent Hotels Ltd | Hospitality | 2026 |
| THE Crew International Ltd | Health & social care | 2024 |
| THE Crowdtheory Entertainment Ltd | Arts & recreation | 2026 |
| THE Dieko's Childcare Ltd | Health & social care | 2025 |
| THE Digital Shelf Ltd | Wholesale & retail | 2024 |
| THE Disablement Association of Barking and Dagenham | Health & social care | 1993 |
| THE Dollhouse Experience by SD Ltd | Other services | 2025 |
| THE Draughtsman London Limited | Professional & scientific | 2016 |
| THE Drifting Tree Ltd | Manufacturing | 2026 |