| Tidemark Trading Limited | Other services | 2017 |
| Tiger Noodle Bar Ltd | Hospitality | 2024 |
| Tigerlily Partners Limited | Arts & recreation | 2015 |
| Tightline ARB UK Ltd | Manufacturing | 2024 |
| Timber Coatings SW Ltd | Construction | 2018 |
| Timber-Tec South West Ltd | Construction | 2024 |
| Timberline Carpentry Limited | Manufacturing | 2015 |
| Timbertecture Ltd | Professional & scientific | 2025 |
| Time & Tide Ltd | Wholesale & retail | 2024 |
| Time for YOU FL Limited | Administrative & support | 2026 |
| Timeless Touch Aesthetics Limited | Other services | 2015 |
| Tinmoor Limited | Construction | 2016 |
| Tiny Toes Pre-School Limited | Education | 2008 |
| Tiny Treasures Play Cafe Ltd | Hospitality | 2024 |
| Titan Training Services Limited | Transport & logistics | 2025 |
| TJ Property Group Ltd | Hospitality | 2026 |
| TJD Leasing Limited | Transport & logistics | 2004 |
| TK Estates & Developments Ltd | Real estate | 2019 |
| Tlac Catering Limited | Hospitality | 2025 |
| Tlac Limited | Hospitality | 2025 |
| Tlac Recruitment Limited | Administrative & support | 2025 |
| TLC Competitions Ltd | Other services | 2025 |
| Tmlzee Group Ltd | Information & communication | 2026 |
| TMO Bodyworx Ltd | Wholesale & retail | 2023 |
| TMS Construction Engineers Limited | Manufacturing | 2009 |
| TMS Machinery & Plant Hire Limited | Administrative & support | 2009 |
| TNW Financial Services Limited | Financial services | 2002 |
| Toby's Sheds (SW) Limited | Wholesale & retail | 2025 |
| Together Bluewater Ltd | Manufacturing | 2020 |
| Together International Ltd | Manufacturing | 2018 |
| TOM Channon Carpentry & Building Limited | Construction | 2025 |
| TOM Gale Limited | Health & social care | 2019 |
| TOM Scudamore Ltd | Information & communication | 2024 |
| TOM Seddon Limited | Professional & scientific | 2023 |
| TOM Stratton and Co LLP | | 2025 |
| Tomhmagic Creations Ltd | Information & communication | 2020 |
| Toms Holidays Limited | Real estate | 2002 |
| Tonecraft Ltd | Extraterritorial | 2025 |
| TOO Much Perspective Limited | Professional & scientific | 2020 |
| Topp Tree Care Limited | Agriculture & fishing | 2025 |
| TOR Court Management Limited | Real estate | 2011 |
| TOR Structural Engineers Ltd | Professional & scientific | 2018 |
| TOR View Roofing Limited | Construction | 2021 |
| Torbay Cars Limited | Wholesale & retail | 2016 |
| Torbay Decorators' Supplies Limited | Professional & scientific | 1964 |
| Torbay Estate Agents Ltd | Real estate | 2023 |
| Torbay Hand Clinic Ltd | Health & social care | 2014 |
| Torbay Holiday Helpers Network (Thhn) | Hospitality | 2011 |
| Torbay Investments Limited | Real estate | 2017 |
| Torbay Knee Surgeon Ltd | Health & social care | 2009 |
| Torbay Motocross Ltd | Wholesale & retail | 2021 |
| Torbay Orthopaedics Limited | Health & social care | 2017 |
| Torbay Park Management Company (NO 2) Limited | Real estate | 2003 |
| Torbay Park Management Company Limited | Real estate | 2007 |
| Torbay Property Ltd | Real estate | 2024 |
| Torbay Urology Limited | Health & social care | 2017 |
| Torexe Ltd | Construction | 2018 |
| Torquay Company of Archers Limited | Arts & recreation | 2017 |
| Torque Parts Limited | Wholesale & retail | 2022 |
| Toscana Investments Ltd. | Real estate | 2014 |
| Toshy Plates Ltd | Manufacturing | 2022 |
| Total Bounce Devon Ltd | Arts & recreation | 2023 |
| Total Event Hire Limited | Administrative & support | 2005 |
| Total Heating and Plumbing Ltd | Construction | 2025 |
| Totally Taxation Limited | Other services | 2000 |
| Totnes Timber Limited | Manufacturing | 2023 |
| Toucan Distribution Limited | Wholesale & retail | 2010 |
| Touch Wood South West Limited | Education | 2015 |
| Tour Padel Avery Hill Ltd | Wholesale & retail | 2026 |
| Tour Padel Ltd | Wholesale & retail | 2024 |
| Tour Padel Medway Ltd | Wholesale & retail | 2025 |
| Tower House School Torbay Ltd | Education | 2012 |
| Tower View Accountants Ltd | Professional & scientific | 2025 |
| TOWERTQ12TAXIS Limited | Transport & logistics | 2021 |
| Tpok Limited | Education | 2025 |
| Tpot Limited | Hospitality | 2018 |
| TQ Direct Ltd | Wholesale & retail | 2024 |
| TQ X11 Ltd | Construction | 2023 |
| TR Talent Limited | Administrative & support | 2019 |
| Tracey Elliot Reep Limited | Information & communication | 2015 |
| Tracey House Ltd | Health & social care | 2025 |
| Tractek Engineering Ltd | Wholesale & retail | 2023 |
| Tradeforce Small Works Limited | Manufacturing | 2002 |
| Training Saints Limited | Arts & recreation | 2002 |
| Transfinite Mind Limited | Information & communication | 2006 |
| Transpilot Ltd | Information & communication | 2025 |
| Transporter Shipping Limited | Administrative & support | 2021 |
| Trauma Associates Ltd | Health & social care | 2021 |
| Treblerrr Limited | Real estate | 2025 |
| Tree Fellas Devon Limited | Administrative & support | 2007 |
| Treelogik Ltd | Administrative & support | 2023 |
| Tregellas Limited | Real estate | 2022 |
| Trehill Arms Limited | Hospitality | 2024 |
| Trenchmore Property Investment Ltd | Real estate | 2023 |
| Trenchmore Property Management Ltd | Households | 2024 |
| Trendlens Ltd. | Professional & scientific | 2021 |
| Trevalgas Farm Cottages Limited | Hospitality | 1999 |
| Triden Limited | Real estate | 2001 |
| Trim TAB Architecture Ltd | Professional & scientific | 2019 |
| Trinity House Ltd | Real estate | 2025 |