| Tedds Club Limited | Health & social care | 2018 |
| Teenmatters Ltd | Health & social care | 2022 |
| Tekton DPW Limited | Professional & scientific | 1999 |
| Tela Tectus Ltd. | Information & communication | 2013 |
| Telesoon Limited | Wholesale & retail | 2025 |
| Templebar Inn Limited | Hospitality | 2011 |
| Temtrading Limited | Information & communication | 2016 |
| TEN24 Communications Limited | Information & communication | 2007 |
| Tenant Finder (UK) Ltd | Real estate | 2009 |
| Tennis Holiday Directory Limited | Information & communication | 2021 |
| Tennyson Gardens Limited | Households | 2014 |
| Tensixtynine Limited | Professional & scientific | 2015 |
| Termhouse (Parr Court) Management Limited | Households | 1976 |
| Termhouse (Tudor House) Management Limited | Households | 1976 |
| Terra Capital Limited | Wholesale & retail | 2019 |
| Terravant Ltd | Information & communication | 2026 |
| Terry Mardi Group Limited | Administrative & support | 2010 |
| Terry Mardi Limited | Professional & scientific | 2007 |
| Tetra Interiors Limited | Construction | 2020 |
| Tfench Ltd | Manufacturing | 2017 |
| TFI Partners Ltd | Professional & scientific | 2023 |
| Thai Diamond Massage Limited | Health & social care | 2018 |
| Thai Thames Grab Limited | Hospitality | 2019 |
| Thaker Food Ltd | Real estate | 2020 |
| Thakers Hounslow Ltd | Hospitality | 2019 |
| Thallon Limited | Households | 2026 |
| Thames Aesthetics Clinic Limited | Extraterritorial | 2025 |
| Thames Capital Consulting Limited | Professional & scientific | 2019 |
| Thames Capital Management Limited | Financial services | 2026 |
| Thames Direct Cremations Ltd | Other services | 2026 |
| Thames Hold Co. Limited | Financial services | 2026 |
| Thames Limited | Real estate | 2015 |
| Thames Physio Services Limited | Health & social care | 2026 |
| Thames Seal Watch CIC | Education | 2025 |
| Thames Skin Clinic Ltd | Health & social care | 2019 |
| Thames Tattoo Ltd | Arts & recreation | 2025 |
| Thames Turbo Triathlon Club | Arts & recreation | 2012 |
| Thames West Developments Ltd | Real estate | 2026 |
| Thanapoonsup Ltd | Hospitality | 2024 |
| Thcg Holdings Limited | Financial services | 2026 |
| THE 67 ST. Margaret's Road Twickenham Residents Association Limited | Households | 1987 |
| THE Agency Group - TAG Limited | Real estate | 2021 |
| THE Andaman Pearls Co. Ltd | Other services | 2024 |
| THE ARD Events Ltd | Wholesale & retail | 2019 |
| THE Auction Room London Ltd | Wholesale & retail | 2021 |
| THE Auriga Academy Trust | Education | 2016 |
| THE BEA Better Group Ltd | Hospitality | 2021 |
| THE BET (IP) Limited | Information & communication | 2019 |
| THE Busy Twist Limited | Information & communication | 2016 |
| THE Cakeologists Limited | Hospitality | 2012 |
| THE Close EYE Ltd | Professional & scientific | 2019 |
| THE Club Talks CIC | Health & social care | 2020 |
| THE Collective Arts Group CIC | Education | 2022 |
| THE Company of Adventurers Limited | Administrative & support | 2002 |
| THE Confessional Limited | Information & communication | 2009 |
| THE Content Creator Studios Twickenham Ltd | Information & communication | 2026 |
| THE Crown Nursery (ST. Margaret’S) Limited | Other services | 2021 |
| THE Crown Nursery (Twickenham) Limited | Other services | 2023 |
| THE Crown Nursery Holdings Limited | Other services | 2024 |
| THE Dairy Vault Ltd | Wholesale & retail | 2023 |
| THE Dialogue Consultancy Limited | Administrative & support | 2000 |
| THE Dog Edit Ltd | Wholesale & retail | 2026 |
| THE DP Cafe Ltd | Hospitality | 2022 |
| THE Dutch Barge Association Limited | Other services | 1992 |
| THE Ellabella Group Ltd | Wholesale & retail | 2019 |
| THE Emergent Organisation Limited | Professional & scientific | 1997 |
| THE Energy Contract Company Ltd | Professional & scientific | 2004 |
| THE Event Professionals Ltd | Arts & recreation | 2015 |
| THE Faith & FIG Company Ltd | Wholesale & retail | 2026 |
| THE Fantastic Mister Props Ltd. | Information & communication | 2016 |
| THE Finished Effect Specialist Decoration Ltd | Professional & scientific | 2020 |
| THE Fitness Chief Ltd | Arts & recreation | 2024 |
| THE Fitness Suite (London) Limited | Information & communication | 2026 |
| THE Food Truck Agency Ltd | Professional & scientific | 2025 |
| THE Gaming Boardroom Ltd | Arts & recreation | 2021 |
| THE Garden Creator Ltd | Administrative & support | 2013 |
| THE Gasolina Media Company Limited | Professional & scientific | 2020 |
| THE Gittins Colgan Group Limited | Hospitality | 2023 |
| THE Good Dog Collective Limited | Other services | 2025 |
| THE Good Economy Partnership Limited | Professional & scientific | 2014 |
| THE Good Urth Company Limited | Wholesale & retail | 2011 |
| THE Green Filmmaker Ltd | Information & communication | 2025 |
| THE Grind Cafe Limited | Hospitality | 2017 |
| THE Happy Ocean Company Limited | Professional & scientific | 2018 |
| THE Hare and the Moon Limited | Wholesale & retail | 2020 |
| THE Harlequins Foundation | Education | 2014 |
| THE Honest Butcher Ltd | Hospitality | 2024 |
| THE Hotel P.R. Company Limited | Professional & scientific | 2002 |
| THE Housing Mediators Ltd | Administrative & support | 2022 |
| THE Hubner Design Company Limited | Construction | 2018 |
| THE Inimitable Software Solutions Limited | Information & communication | 2020 |
| THE Kanteen Group Ltd | Real estate | 2023 |
| THE Kashmir Foundation International | Other services | 1996 |
| THE Kohli Workshop Ltd | Construction | 2025 |
| THE Kollection Limited | Information & communication | 2007 |
| THE Laundry DOC Ltd | Other services | 2026 |
| THE Learning Place Ltd | Education | 2022 |
| THE Lifestyle PR Company Limited | Professional & scientific | 2009 |
| THE Little Lion's Joy Ltd | Health & social care | 2025 |
| THE Local Honey Collective Ltd | Wholesale & retail | 2026 |