| Tavistock Taskforce Community Interest Company | Administrative & support | 2006 |
| Tavistock Tennis Club | Arts & recreation | 2024 |
| Tavistock Therapy Goats Limited | Health & social care | 2024 |
| Tavistock Wine Bar Limited | Hospitality | 2019 |
| Tavy Care Services Limited | Health & social care | 2013 |
| Tavy Consulting Limited | Information & communication | 2019 |
| Tavy Meadow Maintenance Company (Tavistock) Limited | Households | 1981 |
| Tavy Signs Limited | Manufacturing | 2012 |
| Taylor Square Management Company Limited | Administrative & support | 1986 |
| Tbroadbridge Ltd | Agriculture & fishing | 2023 |
| Tchw Limited | Other services | 2019 |
| Tech GUY Tavistock Ltd | Wholesale & retail | 2025 |
| Terranova Trees Ltd | Other services | 2023 |
| Terry Consulting Ltd | Professional & scientific | 2024 |
| THE 2ND Independent Property Development Company Ltd | Construction | 2019 |
| THE Annex Capital Ltd | Hospitality | 2020 |
| THE Arches (Tavistock) Limited | Hospitality | 2013 |
| THE Beauty Luxe Company Ltd | Wholesale & retail | 2018 |
| THE Devonshire Catering Company Ltd | Hospitality | 2013 |
| THE Devonshire Events Company Ltd | Hospitality | 2019 |
| THE Elephant's Nest Limited | Hospitality | 2004 |
| THE Empty Box Company Limited | Manufacturing | 1988 |
| THE Ferns Management Company Limited | Households | 2001 |
| THE Happy Accounting Co Ltd | Professional & scientific | 2014 |
| THE Independent Property Company Ltd | Real estate | 2018 |
| THE Independent Property Development Company Ltd | Extraterritorial | 2019 |
| THE Lemon Grove Cafe (SW) Ltd | Hospitality | 2022 |
| THE Little Field Court Management Company Limited | Professional & scientific | 2010 |
| THE Little Fish Counter Ltd | Hospitality | 2019 |
| THE Malthouse Dartmoor Ltd | Hospitality | 2022 |
| THE Okehampton Photo Centre Limited | Professional & scientific | 2016 |
| THE Old Chapel (Tavistock) Management Limited | Real estate | 2006 |
| THE Old School Children's Centre Ltd | Education | 2022 |
| THE Original Pasty House Limited | Hospitality | 2023 |
| THE Raven Private Postage Limited | Transport & logistics | 2026 |
| THE Robey Trust Limited | Education | 2001 |
| THE Sapphire Retreat Hotel Limited | Hospitality | 2022 |
| THE Secret Stable Ltd | Hospitality | 2023 |
| THE Starlight PUB Group Ltd | Hospitality | 2025 |
| THE Yelverton Carpet Company Ltd | Wholesale & retail | 2022 |
| Thermodynamic Solutions (SW) Ltd | Other services | 2021 |
| Thetavibrand Ltd | Wholesale & retail | 2024 |
| Thetroutandtipple Ltd | Hospitality | 2024 |
| Thought Rebellion Ltd | Information & communication | 2021 |
| TIC TAC Tabletop Ltd | Wholesale & retail | 2024 |
| TIM the Farrier Ltd | Manufacturing | 2013 |
| TIN Shed Pictures Ltd | Information & communication | 2026 |
| Tircea CIC | Education | 2023 |
| TN Training Services Limited | Professional & scientific | 2014 |
| Together WE Plan Ltd | Other services | 2023 |
| Toms Brothers Company Ltd | Wholesale & retail | 2022 |
| Tool Emporium Ltd | Wholesale & retail | 2025 |
| Topfade Barbers PLY Ltd | Other services | 2023 |
| Tree Surfers Limited | Arts & recreation | 2015 |
| Trethorne Leisure Ltd | Arts & recreation | 2008 |
| Treville Properties Limited | Construction | 2005 |
| Triangle Training (UK) Limited | Education | 2003 |
| Triba Limited | Information & communication | 2014 |
| Tricounty Limited | Wholesale & retail | 1988 |
| Tripp IFA Consultancy Ltd | Financial services | 2021 |
| Triquestra Dental Limited | Health & social care | 2019 |
| Trudy Scrumptious Ltd | Hospitality | 2017 |
| TRW Engineering & Sons Ltd | Wholesale & retail | 2021 |
| Turnbull's & Partners Ltd | Real estate | 2020 |
| TVY Developments Ltd | Construction | 2018 |
| Two Bannawell Street Management Company Limited | Households | 1989 |
| Tyremarks Tavistock Ltd | Wholesale & retail | 2021 |
| Ufmedia Limited | Information & communication | 2015 |
| Unique Kitchens & Interiors Ltd | Manufacturing | 2021 |
| Unique Restoration Furniture Ltd | Wholesale & retail | 2021 |
| Unitsite Property Management Limited | Households | 1991 |
| Unsmash Ltd | Wholesale & retail | 2020 |
| UR Lettings Ltd | Extraterritorial | 2013 |
| Urbn Build Ltd | Construction | 2026 |
| V-34 Ltd | Other services | 2019 |
| V-34C Ltd | Other services | 2024 |
| Valentine Property Rentals Limited | Real estate | 2025 |
| Vectra Solutions Limited | Information & communication | 1999 |
| Verrym@Ix Ltd | Construction | 2025 |
| Vervain Health at Home Ltd | Health & social care | 2026 |
| Vicarage Capital Limited | Financial services | 2003 |
| View Comm Limited | Households | 2019 |
| Vigo Mews (Tavistock) Management Company Limited | Households | 2000 |
| Visage Tavistock Ltd | Other services | 2017 |
| Vulture Audio Ltd | Information & communication | 2023 |
| Waters Edge (Tavistock) Management Company Limited | Households | 2007 |
| Week Farm Amenities Limited | Households | 2005 |
| Wello Aroma Limited | Hospitality | 2023 |
| West Country Label Ltd | Administrative & support | 2011 |
| West Country Website Company Ltd | Information & communication | 2011 |
| West Devon & District Care & Support Ltd | Health & social care | 2003 |
| West Devon Art Workshops CIC | Arts & recreation | 2017 |
| West of England Interiors Ltd | Manufacturing | 2019 |
| Westbridge Motor Services Ltd | Wholesale & retail | 2020 |
| Westlake Carpentry and Construction Ltd | Manufacturing | 2026 |
| Weston Building Company Limited | Construction | 2015 |
| White & Goodman (Tavistock) Limited | Real estate | 1939 |
| White Noise Theatre CIC | Arts & recreation | 2024 |
| White's of Tavistock Limited | Real estate | 1946 |
| Whitlock's Accounting Solutions Ltd | Professional & scientific | 2024 |