| West Country Properties Limited | Real estate | 2024 |
| West Country Shutters Limited | Professional & scientific | 2010 |
| West Management (SW) Limited | Administrative & support | 2020 |
| West Monkton Consulting Limited | Professional & scientific | 2013 |
| West Newton Fruit Ltd. | Agriculture & fishing | 2000 |
| West of England Developments (Taunton) Limited | Construction | 2017 |
| West of England Developments (Taunton) NO2 Limited | Construction | 2014 |
| West Somerset Care Limited | Health & social care | 2025 |
| West Somerset Consultancy Ltd | Administrative & support | 2021 |
| West Somerset Holidays Ltd | Hospitality | 2019 |
| West Somerset Properties Ltd | Construction | 2012 |
| West Somerset Railway Association | Education | 1994 |
| West Somerset Railway Heritage Trust Ltd | Arts & recreation | 1972 |
| West Somerset Removals Ltd. | Transport & logistics | 2015 |
| West Trucks (Highbridge) Limited | Wholesale & retail | 2001 |
| West Wing (Kingston ST Mary) Limited | Households | 2010 |
| Westbury Park Property Ltd | Real estate | 2017 |
| Westcott Developments Limited | Construction | 2021 |
| Westcott Windows Ltd | Manufacturing | 2019 |
| Westcountry Haulage Ltd | Transport & logistics | 2019 |
| Westcountry Land (Alphington) Ltd | Construction | 2013 |
| Westcountry Land (Holsworthy) Holdings Limited | Financial services | 2023 |
| Westcountry Land (Holsworthy) Limited | Construction | 2019 |
| Westcountry Land (Kenwyn) Ltd | Real estate | 2017 |
| Westcountry Land (Kergilliack) Limited | Other services | 2016 |
| Westcountry Land (Liskeard) Limited | Construction | 2020 |
| Westcountry Land (Long Rock) Ltd | Construction | 2017 |
| Westcountry Land (South Hams) Ltd | Construction | 2025 |
| Westcountry Land (ST Agnes) Ltd | Construction | 2018 |
| Westcountry Land (Truro) Holdings Limited | Financial services | 2021 |
| Westcountry Land Enterprises (SW) Ltd | Construction | 2016 |
| Westcountry Land Group Ltd | Financial services | 2019 |
| Westcountry Land Investments Limited | Other services | 2021 |
| Westcountry Land Ivybridge Limited | Construction | 2024 |
| Westcountry Railtours Ltd | Administrative & support | 2021 |
| Westerly Plumbing and Heating Limited | Construction | 2018 |
| Westermill Farm Holidays Limited | Hospitality | 1981 |
| Western Bolt & Engineering Supplies Limited | Wholesale & retail | 2012 |
| Western Fabrications (Holdings) Limited | Financial services | 2024 |
| Western Fabrications Limited | Manufacturing | 2002 |
| Western Financial Planning Limited | Financial services | 2007 |
| Western Hydrogen Ltd | Energy | 2020 |
| Western Lion Holdings Limited | Real estate | 2016 |
| Western Lion Limited | Construction | 2014 |
| Western Provident Association Limited | Financial services | 1949 |
| Westford Mechanical (Holdings) Limited | Financial services | 2025 |
| Westford Mechanical Limited | Construction | 2003 |
| Westgate Consultancy Services Limited | Professional & scientific | 2017 |
| Westlands Supported Accommodation Limited | Hospitality | 2011 |
| Westlite Limited | Wholesale & retail | 1998 |
| Westmac Flooring Specialists Ltd | Construction | 2014 |
| Weston Gateway Business Park Management Company Limited | Real estate | 2012 |
| Westone Estate Management Ltd | Real estate | 2017 |
| Westowe Workshops Ltd | Real estate | 2020 |
| Westpark 26 Management Company Limited | Households | 2009 |
| Westpark Management (Hope Cove) Limited | Households | 1992 |
| Westvolt Energy Limited | Construction | 2026 |
| Westward Planning Limited | Administrative & support | 2010 |
| Weymouth Yachts Ltd | Wholesale & retail | 2020 |
| WFH Collective Limited | Construction | 2025 |
| WFP Developments Limited | Construction | 2026 |
| WG Distribution Ltd | Wholesale & retail | 2022 |
| Whalecake Digital Limited | Professional & scientific | 2019 |
| What's OUT There (Supported Accommodation) Limited | Health & social care | 2021 |
| What's OUT There Limited | Health & social care | 2013 |
| Wheatleigh House Management Company Limited | Real estate | 1984 |
| Wheelworx Taunton Ltd Ltd | Construction | 2024 |
| Which Consulting Limited | Information & communication | 2008 |
| Whipcoot Developments Limited | Real estate | 1996 |
| Whirlygig Lane Management Company Limited | Real estate | 2000 |
| Whitaker Law Limited | Professional & scientific | 2024 |
| White Box Lighting Ltd | Wholesale & retail | 2011 |
| White Financial Planning Ltd | Financial services | 2021 |
| White Financial Services Limited | Financial services | 2012 |
| White Horse Mews Management Company Limited | Households | 1991 |
| White House Records Limited | Administrative & support | 2010 |
| White Knight Marketing Ltd | Professional & scientific | 2012 |
| White Lodge Veterinary Clinic Limited | Professional & scientific | 2003 |
| White PIT Agriculture Limited | Agriculture & fishing | 2000 |
| White Stag Lettings Limited | Real estate | 2020 |
| Whiteball Landfill Limited | Water & waste | 1996 |
| Whitecliff (Seaton) Limited | Real estate | 1996 |
| Whitecross Farms Limited | Agriculture & fishing | 2013 |
| Whitelaw Construction Ltd | Construction | 2025 |
| Whitewater Loddon Limited | Health & social care | 2026 |
| Whitfield Inspection Services Limited | Professional & scientific | 2012 |
| Whitley Construction Ltd | Construction | 2021 |
| Whitsend Developments Ltd | Construction | 2019 |
| Whizbizco Limited | Information & communication | 2024 |
| WHU Limited | Education | 2016 |
| Whyman House Dental Practice Limited | Health & social care | 2012 |
| Wibu - Systems Ltd | Wholesale & retail | 2006 |
| Wickwar Trading Estate Limited | Real estate | 1972 |
| Wilcot Ltd | Construction | 2017 |
| Wilcox Group Holdings Ltd | Hospitality | 2021 |
| Wild Harbour Fish Company Limited | Manufacturing | 2012 |
| Wild Minds Community Ltd | Professional & scientific | 2024 |
| Wild Oak Solutions Ltd | Information & communication | 2025 |
| Wildblood Medicolegal Ltd | Professional & scientific | 2026 |
| Wildlyng Limited | Manufacturing | 2018 |