| Totnes and District Show Society | Arts & recreation | 2002 |
| Totnes Auto Services Ltd | Wholesale & retail | 2014 |
| Totnes Tile and Bath Holdings Limited | Financial services | 2025 |
| Touchstone Property Developments Ltd | Real estate | 2025 |
| Tourmotion Limited | Wholesale & retail | 2022 |
| Tournament Limited | Real estate | 2004 |
| Tovy Treats Ltd | Manufacturing | 2024 |
| Townsend Plant & Haulage Limited | Construction | 2015 |
| TPF Enterprises Ltd | Hospitality | 2020 |
| TPH (2026) Limited | Hospitality | 2026 |
| TPL Services Ltd | Construction | 2017 |
| TQ Builders Ltd | Construction | 2024 |
| TQ Dental Services Ltd | Health & social care | 2023 |
| TQ Detailing Limited | Administrative & support | 2025 |
| TQ Home Limited | Real estate | 2022 |
| TQ Lettings Ltd | Real estate | 2013 |
| TQ Logistics SW Ltd | Transport & logistics | 2019 |
| TQ PUB Co Ltd | Hospitality | 2019 |
| TQ Scaffolding Limited | Construction | 2022 |
| TQ1 GAS Services Ltd | Construction | 2025 |
| TQ1 Management Ltd | Hospitality | 2021 |
| TQ2 Investments Limited | Real estate | 2013 |
| TQ2 Letting & Entertainment 2025 Ltd | Hospitality | 2025 |
| TQ2 Ltd | Hospitality | 2019 |
| TR Electrical Contractors Ltd | Construction | 2018 |
| TR Logistics SW Ltd | Transport & logistics | 2024 |
| Trades 24 - 7 Ltd | Construction | 2026 |
| Transform Gyms Ltd | Arts & recreation | 2024 |
| Transport Logistique Saligot Limited | Transport & logistics | 2015 |
| Trash 2 Trees Ltd | Water & waste | 2025 |
| Travel Inns Limited | Hospitality | 2010 |
| Travel Records Ltd | Wholesale & retail | 2025 |
| Travelstyle Global Limited | Wholesale & retail | 2025 |
| Treads Tyres & Autos Limited | Wholesale & retail | 2016 |
| Treat Marketing Ltd | Professional & scientific | 2022 |
| Trees in Need Limited | Agriculture & fishing | 2008 |
| Trehill House RTM Company Limited | Households | 2005 |
| Trevor George Entertainments Limited | Arts & recreation | 2015 |
| TRG Productions Ltd | Information & communication | 2026 |
| TRI Plaster Ltd | Construction | 2012 |
| Trinity Gate Bridgewater Limited | Households | 2005 |
| Trinity Safety Limited | Education | 2015 |
| Triple M Property Investments Ltd | Real estate | 2023 |
| Triton Galleries (Dartmouth) Limited | Wholesale & retail | 2010 |
| Triton Galleries (Devon) Limited | Wholesale & retail | 2009 |
| Triton Galleries Limited | Professional & scientific | 2000 |
| Troisgros & Co Limited | Wholesale & retail | 2011 |
| Trophy Pet Foods Torbay Ltd | Manufacturing | 2024 |
| Truegrainbuild Ltd | Manufacturing | 2025 |
| Trustbotics Ltd | Wholesale & retail | 2023 |
| Truvine Care Inc Ltd | Administrative & support | 2023 |
| TS Asset Verification Ltd | Professional & scientific | 2025 |
| TSD Subsidiary Limited | Extraterritorial | 2019 |
| TT Training and Consultancy Company Ltd | Education | 2012 |
| Tuci Property Development Ltd | Real estate | 2024 |
| Tuci Property Ltd | Construction | 2020 |
| Tufeco Ltd | Water & waste | 2014 |
| Tukilush Dent Ltd | Health & social care | 2023 |
| Tulua Skincare Ltd | Wholesale & retail | 2019 |
| Turning Heads-Changing Perceptions and Lives CIC | Hospitality | 2018 |
| Turning Wild Limited | Agriculture & fishing | 2025 |
| Tuscan Dreams Limited | Administrative & support | 2000 |
| TW Devon Limited | Hospitality | 2019 |
| TWENTY1 Ltd | Hospitality | 2017 |
| Twist Lock Sales Ltd | Manufacturing | 2019 |
| Two Bare Feet Holidays Limited | Financial services | 2021 |
| Two Bare Feet Limited | Wholesale & retail | 2005 |
| Two Pillars Kitchen Ltd | Manufacturing | 2023 |
| TY Room Limited | Hospitality | 2018 |
| Tyrus Holdings Ltd | Real estate | 2025 |
| Ubeberry Ltd | Wholesale & retail | 2026 |
| Ubi-Tech (3R) Limited | Information & communication | 2024 |
| Ubuntu Educational & Mentoring Services CIC | Education | 2023 |
| UGO Taxi Ltd | Transport & logistics | 2019 |
| UK Electrical Contractors Ltd | Construction | 2025 |
| UK Fire and Security Supplies Ltd | Administrative & support | 2023 |
| UK Security Commonwealth Limited | Other services | 2025 |
| UK UN Limited | Health & social care | 2025 |
| Ukfirestoppers Limited | Construction | 2017 |
| Uniquefit Limited | Information & communication | 2021 |
| United Producers Company Limited | Arts & recreation | 1993 |
| United Producers Enterprises Limited | Arts & recreation | 2009 |
| United Producers Music Limited | Arts & recreation | 2004 |
| UP and OUT Construction Ltd | Construction | 2024 |
| Upholstery Temptation Ltd | Manufacturing | 2014 |
| Uprising Properties Limited | Agriculture & fishing | 2009 |
| Upton Social Club Torquay Ltd | Hospitality | 2026 |
| Urbanpatch Residents Management Limited | Households | 1987 |
| V&E Waller Property Group Limited | Real estate | 2025 |
| V. Build Ltd | Construction | 2002 |
| V.P Nouvelle Limited | Transport & logistics | 2016 |
| Valcape Limited | Real estate | 2021 |
| Vane Cliff Management Co. Limited | Households | 1965 |
| Vanguard Enterprise Ltd | Financial services | 2025 |
| Varpo Ltd | Health & social care | 2013 |
| Vaultrex Consulting Ltd | Wholesale & retail | 2025 |
| Vavasour House (Dartmouth) Management Company Limited | Real estate | 1980 |
| Veezoo Ltd | Wholesale & retail | 2019 |
| Vegan Organic Skincare Limited | Wholesale & retail | 2021 |
| Velo Business Services Ltd. | Professional & scientific | 2013 |