| Taunton Mortgage Finance Limited | Financial services | 2017 |
| Taunton Motor Cycle Club Limited | Other services | 1999 |
| Taunton Motorhome Hire Limited | Administrative & support | 2009 |
| Taunton Motoring Club Limited | Arts & recreation | 1971 |
| Taunton Music Trust | Arts & recreation | 2006 |
| Taunton Oak Ltd | Manufacturing | 2011 |
| Taunton Payrolls Limited | Professional & scientific | 2006 |
| Taunton Plumbing and Heating Limited | Construction | 2012 |
| Taunton Pride CIC | Arts & recreation | 2022 |
| Taunton Property Centre Ltd | Real estate | 2018 |
| Taunton Racecourse Company Limited(The) | Arts & recreation | 1927 |
| Taunton Riverside Lounge Ltd | Other services | 2025 |
| Taunton School Educational Charity | Education | 2000 |
| Taunton School Enterprises Limited | Hospitality | 1993 |
| Taunton School Trustees Limited | Financial services | 2008 |
| Taunton Storage and Archive Ltd | Transport & logistics | 2024 |
| Taunton Supplement Centre UK Ltd | Wholesale & retail | 2023 |
| Taunton T5 Limited | Manufacturing | 2015 |
| Taunton Tack Ltd | Wholesale & retail | 2011 |
| Taunton Talent Centre Ltd | Education | 2026 |
| Taunton Taxi Services LLP | | 2019 |
| Taunton Team Chaplaincy Limited | Other services | 2009 |
| Taunton Theatre Association Ltd | Education | 2013 |
| Taunton Timber Limited | Wholesale & retail | 2012 |
| Taunton Town Football Club Limited | Arts & recreation | 1981 |
| Taunton Trailers Limited | Wholesale & retail | 2007 |
| Taunton Tyres Ltd | Wholesale & retail | 2018 |
| Taunton Vale Properties Limited | Real estate | 1996 |
| Taunton Vale Sports Club Limited | Arts & recreation | 2000 |
| Taunton Vineyard Church | Other services | 2001 |
| Taunton Wash Ltd | Administrative & support | 2025 |
| Taunton Watch Services Limited | Wholesale & retail | 2015 |
| Taunton Workwear Ltd | Wholesale & retail | 2024 |
| Taurus Civils and Construction Ltd | Construction | 2021 |
| Taurus Investors Limited | Financial services | 2024 |
| Taurus Piling and Foundations Ltd | Construction | 2015 |
| Tax Dispute Resolution Limited | Professional & scientific | 2010 |
| Taylaw Lettings Ltd | Real estate | 2024 |
| Taylaw Properties Ltd | Real estate | 2021 |
| Taylor & Graydon LLP | | 2015 |
| Taylor & Jeffery Scaffold Contractor Limited | Construction | 2026 |
| Taylor Liscombe Holdings Limited | Financial services | 2026 |
| Taylor’S Rentals Limited | Real estate | 2025 |
| Tayo Care Limited | Health & social care | 2024 |
| TBC (Devon) Ltd | Agriculture & fishing | 2020 |
| TBC Wealden Ltd | Real estate | 2025 |
| TBM Franchising Group Ltd | Professional & scientific | 2019 |
| TC Lettings Ltd | Professional & scientific | 2006 |
| TCD Tech Limited | Administrative & support | 2011 |
| TCS 2023 Ltd | Wholesale & retail | 2023 |
| TD Building Services Limited | Construction | 2009 |
| TD RAD Limited | Health & social care | 2024 |
| TDC Automotive Limited | Wholesale & retail | 2009 |
| TDT Photographic Ltd | Professional & scientific | 2018 |
| Tea & TEE Ltd | Hospitality | 2024 |
| Teacheezy Ltd | Information & communication | 2021 |
| Team Frames (Ashford) Ltd | Wholesale & retail | 2009 |
| Team Green Growers Limited | Agriculture & fishing | 2004 |
| Team Lees Limited | Wholesale & retail | 2013 |
| Team UP Training Limited | Administrative & support | 2018 |
| Teasel Developments Ltd | Construction | 2026 |
| Techedge (UK) Limited | Information & communication | 2012 |
| Techformers Ltd | Information & communication | 2024 |
| Techlink 24 Ltd | Information & communication | 2025 |
| Tecoma Holdings Limited | Professional & scientific | 2023 |
| Teddy Bear (Restaurants) Limited | Real estate | 1966 |
| Teddy Mountain (UK) Limited | Wholesale & retail | 2010 |
| Teddy Mountain Holdings Limited | Financial services | 2019 |
| Teela Limited | Professional & scientific | 2025 |
| Teemoh Cakes and Confectioneries Ltd | Wholesale & retail | 2026 |
| Teevault Limited | Wholesale & retail | 2022 |
| Tehzam Medical Ltd | Health & social care | 2017 |
| Tekam Limited | Professional & scientific | 1972 |
| Telecom Wholesale Limited | Wholesale & retail | 2022 |
| Telekin Ltd | Professional & scientific | 2025 |
| Tellegen Management Limited | Professional & scientific | 2009 |
| Teme Vets Ltd | Professional & scientific | 2021 |
| Temmy Hair Mobile Salon Ltd | Other services | 2025 |
| Temple Farm (Chedzoy) Limited | Agriculture & fishing | 2014 |
| Temple Manor Homes Limited | Construction | 2010 |
| Templeman's Mill Management Company Limited | Households | 2013 |
| Tempohousing Limited | Construction | 2005 |
| TEN2TWO Solutions Ltd | Information & communication | 2018 |
| Tengri Ltd | Manufacturing | 2014 |
| Terence Ball Kitchens Limited | Manufacturing | 2010 |
| Termjoin Property Management Limited | Households | 1989 |
| Tern Property Limited | Financial services | 2019 |
| Terracore Group Limited | Manufacturing | 2020 |
| Terry Williams Ltd | Construction | 2026 |
| Tessa Louise Sander Ltd | Financial services | 2026 |
| Test Valley Vets Limited | Professional & scientific | 2026 |
| Tetham Property Limited | Real estate | 2015 |
| Tetton Shoot Club Limited | Arts & recreation | 2019 |
| Tezcare Ltd | Administrative & support | 2025 |
| TFD Limited | Financial services | 2016 |
| TFM Trading Ltd | Wholesale & retail | 2026 |
| Tfrc Ltd | Administrative & support | 2021 |
| TFY Bristol (Holdings) Ltd | Financial services | 2022 |
| Thaboharan Medical Ltd | Health & social care | 2023 |
| That's Nacho Burrito Limited | Hospitality | 2020 |