| Stepping Stones Financial Advisers Limited | Financial services | 2010 |
| Stockdale Services Limited | Information & communication | 2010 |
| Stone Barns Properties Ltd | Real estate | 2022 |
| Stonehaven Barns Management Company Limited | Households | 2025 |
| Stradbrook Limited | Real estate | 1992 |
| Stratasys Limited | Administrative & support | 1999 |
| Straver Investments Ltd | Real estate | 2020 |
| Structural Weld Limited | Construction | 2002 |
| Stuart Davie Property Services Ltd | Households | 2022 |
| Studio Scaramanga Ltd | Professional & scientific | 2024 |
| Summ-It UP Limited | Professional & scientific | 2010 |
| Sunnycroft Estates Limited | Real estate | 2024 |
| Swift Aquatics Limited | Wholesale & retail | 2022 |
| Swiftville Limited | Real estate | 2001 |
| T. Stacey Transport Ltd | Transport & logistics | 2018 |
| Tanarchist Ltd | Administrative & support | 2025 |
| Teals Orchard Holdings Limited | Wholesale & retail | 2023 |
| Teals Somerset Limited | Wholesale & retail | 2018 |
| Teals Stamford Limited | Wholesale & retail | 2023 |
| Techtidy Ltd | Wholesale & retail | 2023 |
| Tellurium Q Ltd | Wholesale & retail | 2009 |
| THE Body Works (SW) Ltd | Administrative & support | 2016 |
| THE Brand Garage Limited | Professional & scientific | 2013 |
| THE Capri Management Company Limited | Households | 1988 |
| THE Confederation of Healing Organisations | Other services | 2006 |
| THE Etsome Arms Limited | Hospitality | 2020 |
| THE FOX & Hounds Charlton Adam Ltd | Hospitality | 2026 |
| THE Gift of Bread | Health & social care | 2019 |
| THE Goblin Garage Ltd | Wholesale & retail | 2021 |
| THE Good Earth Natural Foods Ltd | Wholesale & retail | 2019 |
| THE Grange (Somerton) Management Company Limited | Real estate | 2003 |
| THE Little Motorcycle Shop Limited | Wholesale & retail | 2019 |
| THE Lynch Country House Hotel Limited | Hospitality | 1987 |
| THE Manna Organisation Ltd | Administrative & support | 2019 |
| THE Motion Laboratories Ltd | Arts & recreation | 2012 |
| THE Natterjack Inn Limited | Hospitality | 2015 |
| THE Production Boutique Limited | Arts & recreation | 2019 |
| THE Seedhouse Limited | Hospitality | 2002 |
| THE Servant Leader Ltd | Professional & scientific | 2025 |
| THE Somerset Cottage Company Limited | Hospitality | 2025 |
| THE Somerton Printery Limited | Manufacturing | 2003 |
| THE Stepping Stone Group Limited | Construction | 1998 |
| THE Town & Country Planning Practice Ltd | Other services | 2004 |
| THE Unicorn Inn Somerton Limited | Hospitality | 2025 |
| Thriveunique Limited | Agriculture & fishing | 1992 |
| TKA Management Limited | Education | 2003 |
| TLE Active Ltd | Education | 2023 |
| Toots Bartlett Equestrian LLP | | 2020 |
| TOR Trucks Limited | Manufacturing | 1992 |
| Tozer Wingate Limited | Extraterritorial | 2004 |
| TR Joinery Limited | Manufacturing | 2023 |
| Tracey Randell Ltd | Administrative & support | 2011 |
| Transworld Software Limited | Information & communication | 1994 |
| Trao TCG Limited | Wholesale & retail | 2025 |
| Trebble Roofing Ltd | Construction | 2016 |
| Tregarrick Court Management Limited | Households | 1999 |
| Trides Holdings Limited | Financial services | 2024 |
| Trides Property Holdings Limited | Real estate | 2025 |
| TT Marine Services Limited | Transport & logistics | 2020 |
| Tune Player Limited | Information & communication | 2010 |
| Turner Windows of Somerton Limited | Administrative & support | 2010 |
| Tutorama Ltd | Education | 2021 |
| Uk-Business-Directory.Co.Uk Ltd | Information & communication | 2018 |
| Ultimate Yachts (UK) Ltd | Arts & recreation | 2015 |
| Underdog Consultancy Limited | Professional & scientific | 2015 |
| Unstruggle Limited | Information & communication | 2015 |
| Vector Fabrications Ltd | Manufacturing | 2024 |
| Vector Flooring Products Ltd | Manufacturing | 2024 |
| Vernon Ltd | Financial services | 2026 |
| Vertex Security Group Ltd | Information & communication | 2025 |
| Viaduct Fisheries Limited | Agriculture & fishing | 1999 |
| Vincent Plastering Limited | Construction | 1999 |
| Virtus Project Management Ltd | Construction | 2013 |
| Vivapersona Limited | Extraterritorial | 2014 |
| Vsgt Ltd | Professional & scientific | 2013 |
| W Automotive Limited | Wholesale & retail | 2026 |
| WA Repairs Ltd | Manufacturing | 2019 |
| Warmly Limited | Other services | 2016 |
| Wessex Consultancy Limited | Professional & scientific | 2019 |
| Wessex Heating Limited | Construction | 2020 |
| Westcombe Waste Ltd | Water & waste | 1987 |
| Westfield Farming Company Ltd | Wholesale & retail | 2020 |
| Westlakes (Somerset ) Limited | Wholesale & retail | 2008 |
| What IF Travel Consultancy? Ltd | Administrative & support | 2023 |
| Whealphoenix Ltd | Hospitality | 2009 |
| Wheaton Plumbing & Heating Limited | Construction | 2022 |
| Wheelchair Accessible Vehicle Expert Solutions Ltd | Manufacturing | 2022 |
| Wheelers Barton Management Limited | Households | 2019 |
| Whetstone Data Engineering Ltd | Information & communication | 2025 |
| Williams Supermarkets Limited | Wholesale & retail | 2002 |
| Willow & Grain Ltd | Arts & recreation | 2025 |
| Woodflooring Engineered Ltd | Manufacturing | 2013 |
| Woodward Mews Residents Association Limited | Real estate | 2006 |
| Wookey Taxis (Consortium) Limited | Transport & logistics | 1989 |
| Worsdale Fabrication Limited | Manufacturing | 2019 |
| WRP Plumbing and Heating Limited | Construction | 2005 |
| Wwpc Ltd | Professional & scientific | 2009 |
| Wynns Wheels Ltd | Wholesale & retail | 2026 |
| XI Systems Ltd. | Information & communication | 2010 |
| Yeovil Promise Ltd | Construction | 2024 |