| Tonbridge Bakery School Ltd | Manufacturing | 2023 |
| Tonbridge Baptist Church | Other services | 2010 |
| Tonbridge Boatyard Limited | Transport & logistics | 2017 |
| Tonbridge Brewery Limited | Manufacturing | 2013 |
| Tonbridge Buy to LET Limited | Real estate | 2025 |
| Tonbridge Constitutional Club Company Limited | Real estate | 1886 |
| Tonbridge Flooring Studio Limited | Wholesale & retail | 2012 |
| Tonbridge Golf Centre Limited | Arts & recreation | 2001 |
| Tonbridge Grammar School | Education | 2010 |
| Tonbridge Home Help Ltd | Hospitality | 2024 |
| Tonbridge International Halal Food Centre Limited | Wholesale & retail | 2020 |
| Tonbridge International Limited | Education | 2026 |
| Tonbridge IT Ltd | Real estate | 2025 |
| Tonbridge Juddians Rugby Ltd | Arts & recreation | 2011 |
| Tonbridge Makerspace Ltd | Other services | 2026 |
| Tonbridge Mini Soccer Alliance CIC | Arts & recreation | 2019 |
| Tonbridge Nails Ltd | Other services | 2025 |
| Tonbridge Property Partners Ltd | Real estate | 2026 |
| Tonbridge School | Education | 2003 |
| Tonbridge Services Limited | Wholesale & retail | 1983 |
| Tonbridge Telephone Limited | Information & communication | 2015 |
| Tonron Ltd | Information & communication | 2016 |
| Tony Sullivan Associates Ltd | Other services | 2020 |
| Tooke Medical Limited | Health & social care | 2015 |
| Top Hill Management Company Limited | Households | 1997 |
| Topal Ltd | Construction | 2013 |
| Topolino Capital Management Ltd | Professional & scientific | 2024 |
| Tops Tonbridge Ltd | Households | 2020 |
| Topwins Limited | Wholesale & retail | 2025 |
| Topy AI Ltd | Information & communication | 2024 |
| TOR Power Limited | Real estate | 2011 |
| Total Elevator & Escalator Care Ltd | Professional & scientific | 2023 |
| Total Energy Rooms Ltd | Administrative & support | 2025 |
| Total MEP Solutions Ltd | Construction | 2023 |
| Totally Gardens & Landscaping Ltd | Administrative & support | 2024 |
| Totally Natural Solutions Ltd | Manufacturing | 2013 |
| Totally Unscripted Ltd | Arts & recreation | 2025 |
| Touchline Growth Limited | Professional & scientific | 2026 |
| Touchpaper Consulting Ltd | Professional & scientific | 2012 |
| Towns Plumbing & Heating Supplies Limited | Wholesale & retail | 2011 |
| Towsers LF Limited | Administrative & support | 2019 |
| Toy Valley Inc Ltd | Information & communication | 2022 |
| TP Psychology Ltd | Health & social care | 2022 |
| TPC Partners LLP | | 2019 |
| TPE Advantage UK Ltd | Construction | 2025 |
| TPL Transport Planning Ltd | Professional & scientific | 2022 |
| Tpro Academy Limited | Education | 2025 |
| Trace and Chase UK Ltd | Wholesale & retail | 2025 |
| Trackload Limited | Professional & scientific | 2009 |
| Traction Consulting Limited | Professional & scientific | 2021 |
| Trade Dimensions Private Limited | Information & communication | 2011 |
| Traffic Light Sauces Ltd | Other services | 2016 |
| Training & Beauty by Hampson Ltd | Other services | 2025 |
| Traintrackr Ltd | Manufacturing | 2021 |
| Traite DE Piano Ltd | Education | 2018 |
| Transtechnology Limited | Manufacturing | 1996 |
| Trapid Response Limited | Other services | 2025 |
| Travel Wish Ltd | Administrative & support | 2025 |
| Travell CAD Services Limited | Professional & scientific | 2016 |
| Trayfell Ltd | Hospitality | 2010 |
| Treacle Ltd | Wholesale & retail | 2019 |
| Treadmill Associates Limited | Professional & scientific | 2011 |
| Tredinnick Health Care Ltd | Health & social care | 2020 |
| Tree Survive Limited | Agriculture & fishing | 2017 |
| Treehouse Training Limited | Education | 2017 |
| Treevero Limited | Construction | 2019 |
| Tremble UK Ltd | Arts & recreation | 2025 |
| Tressillian Media Ltd. | Real estate | 2012 |
| Trevor Laird Associates Limited | Professional & scientific | 2014 |
| Triakis Associates Limited | Professional & scientific | 2016 |
| Trimarine (UK) Limited | Administrative & support | 1999 |
| Trinity Nest Ltd | Wholesale & retail | 2026 |
| Trinity Place Incident Assistance Limited | Financial services | 2013 |
| Trinity Place Legal Services Limited | Professional & scientific | 2021 |
| Trinitym Limited | Financial services | 2004 |
| Triple H Boutique Limited | Wholesale & retail | 2021 |
| Triprate Ltd | Information & communication | 2017 |
| Triton Aerospace Limited | Professional & scientific | 2023 |
| Trivolt Electrical Distribution Ltd | Wholesale & retail | 2023 |
| Trouvailles Design Limited | Professional & scientific | 2021 |
| Trstbl Limited | Information & communication | 2014 |
| True Audio Visual Ltd | Construction | 2017 |
| True Beauty Skincare Limited | Other services | 2018 |
| Truman Studios Limited | Professional & scientific | 2023 |
| Truss Labs Ltd | Information & communication | 2026 |
| TSG Logistics (UK) Limited | Professional & scientific | 1990 |
| TSG Logistics Limited | Professional & scientific | 1990 |
| TSG Medical Ltd | Health & social care | 2025 |
| TSG Worldwide Limited | Professional & scientific | 1990 |
| TSM Systems Ltd | Manufacturing | 2020 |
| Tswana Productions Limited | Professional & scientific | 2024 |
| TT Consulting Limited | Professional & scientific | 2025 |
| TT International Salon Ltd | Other services | 2023 |
| Ttgworkshop Ltd | Manufacturing | 2026 |
| Ttorthopaedics Ltd | Health & social care | 2024 |
| Tudeley Cooper Limited | Real estate | 2007 |
| Tudeley Farm Management Company Limited | Households | 2012 |
| Tudeley Holdings Limited | Professional & scientific | 1980 |
| Tudeley Law Limited | Professional & scientific | 2017 |
| Tudeley Tea Limited | Extraterritorial | 2019 |