| TPC Martock Limited | Manufacturing | 2020 |
| TRAIN4ALL Limited | Other services | 2008 |
| Transform Health & Care Consulting Ltd | Professional & scientific | 2023 |
| Twisted Scissors Hair Ltd | Other services | 2023 |
| Tyrrell Anaesthetics Limited | Health & social care | 2019 |
| Umut Emre Catering Ltd | Hospitality | 2025 |
| Virtual Assist 360 Ltd | Information & communication | 2019 |
| W Parks Roofing & Building Ltd | Construction | 2019 |
| Wakelam Holding and Lettings Enterprise Ltd | Real estate | 2020 |
| WAL Limited | Professional & scientific | 2021 |
| Warman Building Company Ltd. | Construction | 2000 |
| Warman Developments Ltd | Construction | 2016 |
| Warman Holdings Ltd | Professional & scientific | 2016 |
| Waterjet Industries Limited | Manufacturing | 2000 |
| Webber Precision Holdings Ltd | Financial services | 2026 |
| Webber Precision Investments Ltd | Real estate | 2026 |
| Witcombe Ltd | Health & social care | 2025 |
| Woodfull Limited | Professional & scientific | 2010 |
| Xcelo Limited | Professional & scientific | 2025 |
| Yeomarsh Limited | Administrative & support | 2007 |
| Yeovil Car Club Limited | Arts & recreation | 1958 |
| Yeovil Windows and Conservatories Limited | Construction | 2008 |
| Young & Williams Limited | Wholesale & retail | 2003 |
| Yvonnengema Healthcare Ltd | Health & social care | 2020 |