| Synergy Gym Ltd | Arts & recreation | 2025 |
| T C Carriers Ltd | Transport & logistics | 2024 |
| Tarzo Bravo Ltd | Administrative & support | 2024 |
| Taylor Carpentry & Construction Ltd | Construction | 2025 |
| Taylormade Joinery Limited | Manufacturing | 2021 |
| Temperley Holdings Limited | Professional & scientific | 2009 |
| TEN Equals Two Limited | Information & communication | 2018 |
| THE Activity Companions CIC | Health & social care | 2025 |
| THE Apple Bar Ltd | Hospitality | 2025 |
| THE Beech Barn Kitchen Limited | Hospitality | 2025 |
| THE Cyber Detective Ltd | Information & communication | 2026 |
| THE Design Chapter Ltd | Professional & scientific | 2019 |
| THE Dillington Estate Property Investment Partnership LLP | | 2023 |
| THE George Ilminster Ltd | Hospitality | 2025 |
| THE Institute for Systems Engineering | Other services | 2023 |
| THE Lyle Room Limited | Hospitality | 2024 |
| THE Meeting House Arts Centre Limited | Arts & recreation | 2006 |
| THE Mid-Somerset Orchestra Productions Ltd | Arts & recreation | 2022 |
| THE Nomad's Corporation Ltd | Manufacturing | 2018 |
| THE Pheasant Estate Management Limited | Real estate | 2003 |
| THE Sleepy Kuma Ltd | Manufacturing | 2025 |
| THE Soul Collaborative Ltd | Wholesale & retail | 2022 |
| THE Splendid LOO Company Limited | Administrative & support | 2014 |
| THE Web Guild Ltd. | Information & communication | 2015 |
| THE Wedding Balloon Ltd | Extraterritorial | 2026 |
| Thornleigh View Management Co. Limited | Households | 2017 |
| Three Corn Patches Limited | Real estate | 2020 |
| Tmll Limited | Wholesale & retail | 2021 |
| Todays Menu Food Studies Ltd | Hospitality | 2018 |
| TOM Scamell Ltd | Arts & recreation | 2026 |
| Tom's Bike Shed Ltd | Manufacturing | 2022 |
| Tratt Brothers (Master Thatchers) Limited | Construction | 2010 |
| Trinity Moor Ltd | Construction | 2013 |
| True Path Accessible Travel Ltd | Administrative & support | 2026 |
| Tubefit Supplies (Ilminster) Limited | Arts & recreation | 1973 |
| Turner & Powell Estate Agents Ltd | Real estate | 2025 |
| Twelve Magpies Ltd. | Hospitality | 2014 |
| UK Colloidal Laboratories Ltd | Wholesale & retail | 2007 |
| UK Colloidal Silver Ltd | Wholesale & retail | 2019 |
| Under Pressure (SW) Limited | Manufacturing | 2012 |
| Unity Control Systems Ltd | Manufacturing | 1996 |
| Veelyn Limited | Wholesale & retail | 2014 |
| Verisafe Software Ltd | Information & communication | 2025 |
| Victoria Court and the George Inn (Ilminster) Management Co. Limited | Households | 1998 |
| Voge Ltd | Construction | 2015 |
| Volante Marketing Ltd | Extraterritorial | 2026 |
| W. Coombes & Sons (Contractors) Limited | Construction | 1973 |
| Walker Utopia Ltd | Arts & recreation | 2012 |
| Walronds Park Limited | Agriculture & fishing | 1960 |
| WD Logistics Ltd | Transport & logistics | 2026 |
| Webber Aero Solutions Ltd | Manufacturing | 2022 |
| Wessex Property Preservation Limited | Professional & scientific | 2015 |
| West Country Cabs Ltd | Transport & logistics | 2024 |
| West Street Fryer Limited | Hospitality | 2017 |
| West Street Maintenance Limited | Professional & scientific | 1982 |
| Westlake Property Group Ltd | Real estate | 2025 |
| Weston Rentals Limited | Real estate | 2018 |
| Westward Ballooning Ltd | Administrative & support | 2026 |
| White Bear Technology Ltd | Information & communication | 2026 |
| Whitefield Accountants Limited | Professional & scientific | 2021 |
| Widgery Farm (Management) Limited | Real estate | 2020 |
| Wilcox Rebar Limited | Construction | 2004 |
| Wild Stride Expeditions Ltd | Administrative & support | 2023 |
| Wildfire Development Solutions Limited | Information & communication | 2012 |
| Wilfred Road Management Company Limited | Households | 2016 |
| Willowood Communications Limited | Professional & scientific | 2023 |
| Winchester Builders Ltd. | Construction | 2003 |
| Windwhistle 4X4 Ltd | Wholesale & retail | 2016 |
| Windwhistle Motor Club Limited | Arts & recreation | 1999 |
| Wise Property Claims Services Ltd | Professional & scientific | 2026 |
| Wishglen Properties Limited | Real estate | 1964 |
| Withio Construction Limited | Construction | 2025 |
| Woodleigh Digital Consultancy Limited | Information & communication | 2025 |
| Woodram Construction Limited | Construction | 2011 |
| Woodram Estates LLP | | 2009 |
| Woody's Carpentry & Building Ltd | Construction | 2015 |
| Wrac Properties Ltd | Real estate | 2023 |
| Wrapped Ltd | Extraterritorial | 2010 |
| Zavial Limited | Information & communication | 2010 |
| ZTS Development Ltd | Information & communication | 2013 |