| THE Glove Factory Management Company Limited | Households | 2004 |
| THE Grange (Primrose Lane) Management Company Limited | Households | 2007 |
| THE Granite Room Limited | Wholesale & retail | 2011 |
| THE Hamper Guys Limited | Wholesale & retail | 2021 |
| THE Home Food & Furnishing Ltd | Wholesale & retail | 2025 |
| THE Hub-Yeovil Community Support Charity | Education | 2010 |
| THE Hyde Tennis Club Limited | Arts & recreation | 1997 |
| THE Ilchester Cheese Co. Ltd. | Manufacturing | 1965 |
| THE Innovess Group CIC | Administrative & support | 2023 |
| THE Keep Residents Limited | Households | 2018 |
| THE Key Collective Ltd | Households | 2026 |
| THE Knoll (Yeovil) Trading Ltd | Health & social care | 2023 |
| THE Knoll Nursing Home (Yeovil) Limited | Health & social care | 2004 |
| THE League for Dance Schools UK Ltd | Arts & recreation | 1988 |
| THE Licensing Specialist Limited | Professional & scientific | 2020 |
| THE Lord Nelson Bridport Limited | Hospitality | 2024 |
| THE Luna Network Ltd | Professional & scientific | 2025 |
| THE Masons Arms Yeovil Limited | Hospitality | 2025 |
| THE Meditation and Music Company Limited | Professional & scientific | 2019 |
| THE Mildmay Arms Limited | Wholesale & retail | 2025 |
| THE Mineral Company Ltd. | Mining & quarrying | 2022 |
| THE Old Creamery Limited | Wholesale & retail | 1973 |
| THE Old Mill Furniture and Interiors Ltd | Wholesale & retail | 2020 |
| THE Old Mill Kitchens and Furniture Limited | Wholesale & retail | 2025 |
| THE Old Parlour Farm Shop Ltd | Wholesale & retail | 2016 |
| THE One Reluctant Lemming Company Limited | Arts & recreation | 2002 |
| THE Orchard Inn KSH Ltd | Health & social care | 2025 |
| THE Ox,Oriental Conexions Restaurant, Bar and Take Away Ltd | Hospitality | 2019 |
| THE Palmers Group Limited | Wholesale & retail | 2019 |
| THE Plume of Roses Catering Limited | Hospitality | 2018 |
| THE Pregnancy Lounge Ltd | Education | 2025 |
| THE Ranch Cafe and Deli Ltd | Hospitality | 2019 |
| THE Raven of Bath Ltd | Hospitality | 2006 |
| THE Screwfix Foundation | Health & social care | 2013 |
| THE Shared House Company Limited | Real estate | 2015 |
| THE Social SUP Ltd | Professional & scientific | 2025 |
| THE Sports Pony Studbook Society | Other services | 2000 |
| THE Strode Arms Ltd | Hospitality | 2022 |
| THE Timber Sash Window Partnership Ltd | Other services | 2007 |
| THE TOM Shilcock Mentorship Programme Limited | Education | 2025 |
| THE Treehouse Somerset Ltd | Health & social care | 2022 |
| THE TUT Hill Gang Ltd | Manufacturing | 2019 |
| THE TWC Collective Limited | Professional & scientific | 2024 |
| THE Vice Works Limited | Wholesale & retail | 2021 |
| THE Viceroy Lounge Limited | Hospitality | 2016 |
| THE Warehouse (Yeovil) Limited | Hospitality | 2024 |
| THE White Hart Wilmington Ltd | Hospitality | 2024 |
| THE White Lion Apsley Limited | Hospitality | 2022 |
| THE Wright Cleaning Company Ltd | Administrative & support | 2024 |
| THE Yasmin Edit Ltd | Information & communication | 2026 |
| THE360STUDIOS Ltd | Information & communication | 2021 |
| Theepanarayanan Ltd | Wholesale & retail | 2018 |
| Theobald Consultancy Services Limited | Professional & scientific | 1997 |
| There IS Limited | Professional & scientific | 2011 |
| Thomas & Mather Limited | Health & social care | 2018 |
| Thomas and Winchester Limited | Extraterritorial | 2004 |
| Thorn Wood Forge Ltd | Manufacturing | 2024 |
| Threadfit Ltd | Wholesale & retail | 2025 |
| Three Birds Property Limited | Real estate | 2022 |
| Three Small Onions Ltd | Hospitality | 2025 |
| Throw N Go Limited | Wholesale & retail | 2026 |
| TIM Dawson (Holdings) Limited | Financial services | 2013 |
| TIM Leacock Aircraft Sales Limited | Other services | 1980 |
| Time ETC Limited | Administrative & support | 2007 |
| Time ETC USA Ltd | Other services | 2008 |
| Timothy Charles and Company Investments Limited | Real estate | 2019 |
| Timothy Charles and Company Limited | Construction | 2017 |
| Titan Avrx Ltd | Information & communication | 2017 |
| TKB EMC Services Limited | Professional & scientific | 2018 |
| TKD Construction Limited | Construction | 2022 |
| Tktn Investments Ltd | Real estate | 2023 |
| TLC (Yeovil) Limited | Professional & scientific | 2023 |
| TLC Agency Ltd | Administrative & support | 2015 |
| TLC Enterprises Ltd | Professional & scientific | 2025 |
| TMB Holdings | Financial services | 2020 |
| TMS Skin Solutions Limited | Wholesale & retail | 2024 |
| TMT (South West) Ltd | Extraterritorial | 2009 |
| TMT Management | Financial services | 2019 |
| TNA Fabrics Ltd | Wholesale & retail | 2022 |
| Tolba Anaesthetic Care Ltd | Health & social care | 2026 |
| TOM Dorse Ltd | Professional & scientific | 2017 |
| TOM LIU Consulting Limited | Information & communication | 2024 |
| TOM Sweep Ltd | Construction | 2023 |
| Toms Travels Limited | Transport & logistics | 2018 |
| Tool Spares Limited | Wholesale & retail | 2008 |
| TOOTHDOC4 Limited | Health & social care | 2011 |
| Tootle Bridge Properties Limited | Construction | 2013 |
| Top Barber (Yeovil) Ltd | Other services | 2025 |
| Top Barber 1 Ltd | Other services | 2026 |
| Torvus Consultants Limited | Information & communication | 2013 |
| Totally Floored (South West) Limited | Administrative & support | 2015 |
| Towers Wills Ltd | Real estate | 2017 |
| Townsend Developments (Coker) Limited | Construction | 1998 |
| Townsend Farm (East Coker) Management Company Limited | Households | 2017 |
| TP Creates Ltd | Extraterritorial | 2021 |
| Trade Solutions (Yeovil) Ltd | Construction | 2014 |
| Tranquility Aerospace Ltd | Professional & scientific | 2011 |
| Tranquility Trading Ltd | Wholesale & retail | 2026 |
| Transolva Ltd. | Transport & logistics | 2011 |
| TRC Educational Consultant Ltd | Professional & scientific | 2023 |