| 300 QTR Ltd | Households | 2011 |
| A & D Pinkett Limited | Construction | 2008 |
| A & R Windows Limited | Administrative & support | 2002 |
| A Class Plastering Ltd | Construction | 2015 |
| A Way Property Ltd | Real estate | 2025 |
| A. Wensley Service & Repairs Limited | Wholesale & retail | 2006 |
| A303 Motorcycle Services Limited | Wholesale & retail | 2016 |
| Aayushi Trading Ltd | Wholesale & retail | 2018 |
| AD Steel Developments Limited | Real estate | 2011 |
| AD Steel Fabrications Limited | Construction | 2021 |
| Adanac Financial Services Limited | Financial services | 2002 |
| Alexandra Road and Williams Court Management Company Limited | Households | 2018 |
| Allen & Associates Consultancy Ltd | Professional & scientific | 2018 |
| Allen Property Developments Ltd | Construction | 2015 |
| Allsorts Construction Ltd | Construction | 2020 |
| Alonzi Transport Limited | Construction | 2013 |
| Altayr Ltd | Professional & scientific | 2026 |
| Anderton Structural Limited | Construction | 2006 |
| Anderton Structural Repair Services (Yeovil) Limited | Construction | 2005 |
| Apexgarden’S Landscaping Ltd | Other services | 2023 |
| Appleby Plastering Limited | Construction | 2012 |
| ARC Commercial Services Ltd | Professional & scientific | 2023 |
| Arrow Care Training Ltd | Education | 2015 |
| Articus Ltd | Administrative & support | 1978 |
| Artus Support Ltd | Professional & scientific | 2026 |
| ASH Lettings Yeovil Limited | Administrative & support | 2012 |
| Ashcot Construction Ltd | Construction | 2017 |
| Ashcot Developments Ltd | Construction | 2024 |
| Ashcot Group Limited | Construction | 2025 |
| Asrs (Worthing) Limited | Construction | 2005 |
| Asrs Limited | Construction | 2003 |
| Auto Crash Repairs Somerset Limited | Wholesale & retail | 2021 |
| Bags of Room Limited | Extraterritorial | 2023 |
| Bailar Ltd | Arts & recreation | 2014 |
| BAM Consultancy Ltd | Professional & scientific | 2008 |
| Begat Property Management Ltd | Construction | 2021 |
| Bella Inns Limited | Hospitality | 2022 |
| BEN Jones Football Coaching Ltd | Arts & recreation | 2023 |
| Bitter Sea Trading and Holding Company Limited | Information & communication | 2018 |
| BJA Construction Limited | Administrative & support | 2003 |
| Branded Autocare Ltd | Administrative & support | 2023 |
| Brann Group Ltd | Professional & scientific | 2025 |
| Brick Living and Dining Limited | Manufacturing | 2019 |
| Brocks Flats Limited | Real estate | 2006 |
| Brooks & SON (Martock) Limited | Information & communication | 1946 |
| Buckley Property Ltd | Real estate | 2019 |
| Bunny Construction Limited | Construction | 1976 |
| Burnham Media Services Ltd | Manufacturing | 2003 |
| BY Anna Elizabeth Limited | Other services | 2022 |
| CA Johnston Ltd | Manufacturing | 2021 |
| Caesius Venture Limited | Professional & scientific | 2005 |
| Carlas Foods Ltd | Hospitality | 2025 |
| Castle Reclamation Limited | Wholesale & retail | 2003 |
| Cathedral Stone Masons Limited | Manufacturing | 2003 |
| Chapel House Holidays Ltd | Hospitality | 2026 |
| Cheltenham Stonemasons Limited | Construction | 2016 |
| Cherry Tree (UK) Ltd | Manufacturing | 2007 |
| Cherry Tree Retail Ltd | Wholesale & retail | 2024 |
| Citadel Conservation & Restoration Ltd | Manufacturing | 2021 |
| Clean Image (South West) Limited | Administrative & support | 2004 |
| Cloverleaf Motor Group Ltd | Wholesale & retail | 2017 |
| Coat Capital Ltd | Professional & scientific | 2025 |
| Cobden Investments Limited | Professional & scientific | 1992 |
| Commission Pipelines Limited | Construction | 2007 |
| Core Tuition Limited | Education | 2019 |
| Cori Taxi Ltd | Transport & logistics | 2024 |
| Country Build SW Ltd | Construction | 2014 |
| County Car Services Limited | Wholesale & retail | 2003 |
| Courtfield Farm Limited | Agriculture & fishing | 2015 |
| COX Motors Somerton Ltd | Wholesale & retail | 2011 |
| CPL Pipelines Limited | Construction | 2019 |
| CPR Logistics Ltd | Construction | 2008 |
| CR Scaffolding SW Ltd | Construction | 2025 |
| Craftex Cleaning Systems Limited | Manufacturing | 2012 |
| Craftex Holdings Limited | Financial services | 2026 |
| D Eddington Building Renovations Limited | Construction | 2002 |
| D F Auto Repair Limited | Wholesale & retail | 2010 |
| D J Diment Upholsterers Limited | Other services | 2003 |
| D J Morris Limited | Construction | 2003 |
| D R Smith & Sons Limited | Construction | 2020 |
| D.J. Boulton Limited | Real estate | 1990 |
| Da-Composites Ltd | Wholesale & retail | 2025 |
| David Hutchins Innovation Limited | Extraterritorial | 2012 |
| David Hutchins International Limited | Professional & scientific | 2002 |
| David Hutchins International Quality College Limited | Extraterritorial | 2014 |
| DB Education Limited | Education | 2017 |
| DCE Systems Limited | Construction | 2017 |
| Dclh Associates Limited | Professional & scientific | 2018 |
| Defries Legal Limited | Professional & scientific | 2017 |
| Dervishi Limited | Hospitality | 2020 |
| DG Carpentry & Maintenance Ltd | Construction | 2013 |
| DMT (SW) Ltd | Education | 2025 |
| DRA Woodwork Ltd | Manufacturing | 2021 |
| Drapes Direct Limited | Manufacturing | 2015 |
| DSB Builders Limited | Construction | 2001 |
| DSE Holdings Ltd | Professional & scientific | 2017 |
| DT Selfstore (Somerset) Ltd | Other services | 2019 |
| Dutson Co Catering Ltd | Hospitality | 2025 |
| EAQ Manor Farm CIC | Other services | 2017 |
| Elancray Limited | Construction | 1978 |