| THE South West Vein Clinic Ltd | Health & social care | 2012 |
| THE Spin Collective Limited | Arts & recreation | 2025 |
| THE Stables Hospitality Ltd | Hospitality | 2025 |
| THE Stack Cottage Company Ltd | Information & communication | 2017 |
| THE Stationery House UK Ltd | Manufacturing | 2025 |
| THE Stoneyard.Co.Uk Limited | Other services | 2007 |
| THE Studio at Bank House Limited | Health & social care | 2015 |
| THE Study Buddy Studios Limited | Education | 2018 |
| THE Success Encryption Ltd | Professional & scientific | 2018 |
| THE Swan KSM Ltd | Hospitality | 2022 |
| THE Tacchi-Morris Centre | Arts & recreation | 1988 |
| THE Taco Shack Ltd | Hospitality | 2024 |
| THE Taunton Masonic Hall Company Limited | Other services | 2009 |
| THE Tech Care Lounge Ltd | Information & communication | 2023 |
| THE Terrace(Taunton) Ltd | Health & social care | 2011 |
| THE Timothy Langston Collective Limited | Other services | 2019 |
| THE Trade Link Company Limited | Administrative & support | 1991 |
| THE Transformation Office Limited | Professional & scientific | 2016 |
| THE Triathlon Training Team Ltd | Arts & recreation | 2013 |
| THE Trill Trust | Education | 2001 |
| THE Udder Stuff Ltd | Manufacturing | 2023 |
| THE Underground Brewing Company Ltd | Manufacturing | 2024 |
| THE Unlearning Consultancy Ltd | Professional & scientific | 2018 |
| THE Urban VET Limited | Professional & scientific | 2020 |
| THE Vimal Group Limited | Administrative & support | 2016 |
| THE WAG (Taunton) Limited | Other services | 2023 |
| THE Waggon Taunton Ltd | Hospitality | 2025 |
| THE Waters Partnership Limited | Information & communication | 2008 |
| THE Weir (Taunton) Limited | Hospitality | 2018 |
| THE Wessex Conservation Company Limited | Construction | 2015 |
| THE West Country Fish Club Limited | Wholesale & retail | 2006 |
| THE White Feather Coffee Co Ltd | Hospitality | 2017 |
| THE Wife and I Sausage Company LLP | | 2021 |
| THE Willows Day Service Limited | Other services | 2019 |
| THE Wood-Fired Camping Club Ltd | Hospitality | 2021 |
| THE Woodstock Wagon Company Limited | Manufacturing | 2016 |
| THE Woolly Shepherd Limited | Manufacturing | 2013 |
| THE Woven Briar Ltd | Arts & recreation | 2012 |
| THE WPA Foundation | Other services | 1999 |
| THE Writing HUT Limited | Information & communication | 2009 |
| THE Wyvern Taunton CIC | Hospitality | 2024 |
| Theaks Mews Management Company Limited | Professional & scientific | 2000 |
| Themugvault Ltd | Wholesale & retail | 2026 |
| Theobald’S Catering Ltd | Hospitality | 2025 |
| Therapy of Mind Ltd | Health & social care | 2024 |
| There's More to Life Limited | Administrative & support | 2018 |
| Theresa M-C HSU Locums Limited | Professional & scientific | 2014 |
| Thermo-Fix Ltd | Construction | 2019 |
| Thermodesign Ltd | Manufacturing | 2013 |
| Theta Technical Ltd | Professional & scientific | 2018 |
| Thetoyboy Ltd | Wholesale & retail | 2025 |
| Thewainwrightbishopgroup Ltd | Education | 2024 |
| Thicksole Limited | Professional & scientific | 2024 |
| Third Channel Limited | Information & communication | 2011 |
| THIRTEEN74 Ltd | Information & communication | 2015 |
| Thirty Devonshire Place Limited | Real estate | 2006 |
| This IS Loop Ltd | Arts & recreation | 2017 |
| This IS the Temple Ltd | Information & communication | 2025 |
| Thistle View Properties Ltd | Financial services | 2020 |
| Thomas Harral Metalsmiths Limited | Manufacturing | 2010 |
| Thomas Malone Bloodstock Agent Limited | Arts & recreation | 2011 |
| Thomas More Court Management RTM Company Limited | Households | 2008 |
| Thomas Online Ltd | Wholesale & retail | 2022 |
| Thomason Engineering Ltd | Professional & scientific | 2013 |
| Thorne Farm LLP | | 2022 |
| Thornfalcon Storage Ltd | Real estate | 2015 |
| Thornfalcon Vineyard Limited | Manufacturing | 2023 |
| Thoroughbred (South West) Limited | Real estate | 1987 |
| Thos.S.Penny,Limited | Real estate | 1907 |
| Three Acres Maintenance Limited | Construction | 2006 |
| Three Ferns Limited | Manufacturing | 2023 |
| Three Moors Veterinary Services Ltd | Professional & scientific | 2025 |
| Three Pointed Parts Limited | Wholesale & retail | 2011 |
| Three-D Build UK Ltd | Construction | 2014 |
| Threemilestone Lettings Limited | Real estate | 2022 |
| Threlfall Racing Ltd | Professional & scientific | 2015 |
| Thrice Medical Limited | Health & social care | 2024 |
| Thursting Ltd | Wholesale & retail | 2021 |
| Tibetaantjes Ltd | Health & social care | 2005 |
| Tica Lily Ltd | Manufacturing | 2021 |
| Tick TAW Ltd | Real estate | 2025 |
| Tidings Care Homes Ltd | Health & social care | 2007 |
| Tigarius Limited | Real estate | 2021 |
| Tigarius Property Limited | Real estate | 2024 |
| Tigillus Limited | Real estate | 1994 |
| Tilbury Farm Ltd | Real estate | 2025 |
| Tile Supply Solutions Limited | Construction | 2006 |
| Tilleyy Limited | Wholesale & retail | 2025 |
| TIM Hawkins Limited | Agriculture & fishing | 2012 |
| TIM Hutchinson Limited | Real estate | 2019 |
| TIM Lang Classics Ltd | Wholesale & retail | 2010 |
| Tim's Tech Tips Limited | Professional & scientific | 2016 |
| Time and Cost Limited | Extraterritorial | 2014 |
| Timeforge Ltd | Professional & scientific | 2011 |
| Timms Consulting Ltd | Professional & scientific | 2018 |
| Timothy Langston Fine Art & Antiques Limited | Wholesale & retail | 2008 |
| Timothy Pink Accountancy and HR Services Limited | Professional & scientific | 2009 |
| Tiny Blue DOT Ltd | Professional & scientific | 2014 |
| Tiny Loop Ltd | Information & communication | 2025 |
| Tipi Tapa Ltd | Hospitality | 2021 |