| WEA Limited | Professional & scientific | 2014 |
| Weardale Minerals Limited | Mining & quarrying | 2025 |
| Wearetheorder.Com Ltd | Professional & scientific | 2025 |
| Weberbuild Ltd | Construction | 2017 |
| Websilk Limited | Professional & scientific | 2025 |
| Welloria Care Ltd | Health & social care | 2025 |
| Wentin Fasteners Limited | Wholesale & retail | 2003 |
| Wessex Commercial Solutions Limited | Professional & scientific | 2009 |
| Wessex Court (Henstridge) Limited | Households | 2007 |
| Wessex Drain Services Ltd | Water & waste | 2006 |
| Wessex Estate Management Limited | Real estate | 2013 |
| Wessex Farms Limited | Professional & scientific | 1990 |
| Wessex Industrial Doors (Yeovil) Limited | Construction | 1982 |
| Wessex Industrial Holdings Limited | Financial services | 2022 |
| Wessex Removals Ltd | Transport & logistics | 2024 |
| Wessex Road (Yeovil) Residents Company Limited | Households | 2001 |
| West Coker Garage Limited | Wholesale & retail | 2013 |
| West Country Bloodstock Limited | Arts & recreation | 2024 |
| West Country Cleaning Supplies Limited | Wholesale & retail | 2017 |
| West Country Environmental Ltd | Wholesale & retail | 2017 |
| West Country Lawns Ltd | Administrative & support | 2011 |
| West Country Pest Control Ltd | Agriculture & fishing | 2018 |
| West Country Water Buffalo Limited | Agriculture & fishing | 2014 |
| West Country Windows (Double Glazing) Holdings Limited | Financial services | 2023 |
| West East Software Limited | Information & communication | 2018 |
| West END Garage (Yeovil) Limited | Wholesale & retail | 2007 |
| West Hall Farm Management Limited | Extraterritorial | 2004 |
| West Park Building Contractors Ltd | Construction | 2013 |
| Western Information Systems Limited | Other services | 2015 |
| Westfield Academy Trust | Education | 2011 |
| Westland Stores Limited | Wholesale & retail | 2017 |
| Westward Fabrications Limited | Manufacturing | 2002 |
| Westward Metals Ltd | Financial services | 2019 |
| Wheelshine Ltd | Manufacturing | 2016 |
| Whetham Partners Ltd | Construction | 2022 |
| Whitcombe Farm Limited | Agriculture & fishing | 2006 |
| White Daisy Limited | Information & communication | 2014 |
| Whitehill Country Holdings Limited | Financial services | 2016 |
| Whitehill Country Park Limited | Hospitality | 2003 |
| Whitehill Garden Centre Limited | Wholesale & retail | 2017 |
| Whiteman Financial Limited | Professional & scientific | 2012 |
| Whitepost Ltd | Wholesale & retail | 2022 |
| Whiteside Homes Limited | Construction | 2014 |
| Whittle's Heating Services Limited | Construction | 2025 |
| Wifi Wars Limited | Arts & recreation | 2016 |
| Wilco Aviation Limited | Wholesale & retail | 2018 |
| Wildcomfort Ventures Limited | Manufacturing | 2018 |
| Wilfred Care Ltd | Health & social care | 2016 |
| Wilkes Engineering & Machinery Limited | Professional & scientific | 2016 |
| Williams Property Holding Company Limited | Financial services | 2018 |
| Wincanton Chiropractic Ltd | Health & social care | 2002 |
| Windermere Estates Limited | Real estate | 2013 |
| Wintair Company Limited | Manufacturing | 1999 |
| Winwick Developments Limited | Construction | 2019 |
| Wired Aerial Limited | Arts & recreation | 2026 |
| Wired Aerial Theatre | Arts & recreation | 2011 |
| Wired-In-Uk Ltd | Information & communication | 2026 |
| Wirewright Limited | Manufacturing | 2007 |
| With Love for YEW Ltd | Wholesale & retail | 2013 |
| Withers Engineering Services Limited | Financial services | 2023 |
| Witt Management Ltd | Hospitality | 2015 |
| WJT Hospitality Limited | Hospitality | 2021 |
| WLY London Ltd | Arts & recreation | 2016 |
| Wm.C.Duffield,Limited | Manufacturing | 1949 |
| Woodenhouse Design and Build Limited | Construction | 2016 |
| Woodland Grove Property Management Limited | Households | 2025 |
| Woodland Scope Ltd | Agriculture & fishing | 2026 |
| Woods&Springs Limited | Administrative & support | 2015 |
| Woodstock Interiors Limited | Extraterritorial | 2008 |
| Working on Water Limited | Extraterritorial | 2011 |
| Workplacestuff Limited | Extraterritorial | 2015 |
| World Class Willow Ltd | Manufacturing | 2018 |
| Worleys Ltd | Construction | 2023 |
| WP Industrial Limited | Wholesale & retail | 2012 |
| WR Hospitality Limited | Hospitality | 2017 |
| Wyndham Court (Yeovil) RTM Company Limited | Real estate | 2010 |
| Wyndham Roofing & Building Limited | Construction | 2025 |
| Wyvern Nursery Limited | Health & social care | 2012 |
| Xelor Transport Limited | Real estate | 1991 |
| Xelsion Ltd | Professional & scientific | 2011 |
| Xenos Systems Ltd | Information & communication | 2022 |
| Xtremepoint Ltd | Wholesale & retail | 2026 |
| Yakacik Polat Limited | Hospitality | 2013 |
| Yaos Productions Limited | Arts & recreation | 2014 |
| Yapp Brothers Limited | Wholesale & retail | 1985 |
| Yathushivan Properties Ltd | Real estate | 2024 |
| Yaya Healthcare Ltd | Health & social care | 2019 |
| YB Kids Limited | Wholesale & retail | 2015 |
| YCC Trading Subsidiary Limited | Wholesale & retail | 2026 |
| YDC Events Ltd | Arts & recreation | 2023 |
| Yellow Box Signs and Graphics Limited | Administrative & support | 2013 |
| Yellow Box Solutions Ltd | Administrative & support | 2009 |
| Yemnah Limited | Wholesale & retail | 2025 |
| YEO Taxis Ltd | Transport & logistics | 2020 |
| YEO Vale Internet Limited | Information & communication | 2005 |
| YEO Vale Motor Cycling Club Limited | Arts & recreation | 1982 |
| Yeo-Move Ltd | Arts & recreation | 2026 |
| Yeobuild Limited | Construction | 2005 |
| Yeofix Ltd | Wholesale & retail | 2026 |
| Yeolets Limited | Real estate | 2013 |