| Weeks ENG Ltd | Mining & quarrying | 2019 |
| Weird Weather Ltd | Professional & scientific | 2016 |
| Welcom Technology Ltd | Information & communication | 2011 |
| Well Balanced Bookkeeping Limited | Professional & scientific | 2025 |
| Well Spice Ltd | Hospitality | 2020 |
| Well Working Matters Ltd | Administrative & support | 2013 |
| Wellesley Park Owners Group Ltd | Administrative & support | 2015 |
| Wellington Flat Roofing Ltd | Construction | 2012 |
| Wells (Trading) Golf Club Ltd | Arts & recreation | 2024 |
| Wells and Horrington Cricket Club Limited | Arts & recreation | 2023 |
| Wells Art Contemporary Community Interest Company | Arts & recreation | 2012 |
| Wells Automotive Limited | Wholesale & retail | 2003 |
| Wells Bathrooms Ltd | Wholesale & retail | 2020 |
| Wells BED Shop Limited | Wholesale & retail | 2011 |
| Wells Blue Sports Centre Ltd | Education | 2012 |
| Wells Building & Restoration Ltd | Construction | 2013 |
| Wells Business Forum CIC | Information & communication | 2022 |
| Wells Cathedral Catering Limited | Extraterritorial | 1983 |
| Wells Cathedral Enterprises Limited | Wholesale & retail | 1983 |
| Wells Cathedral Publications Limited | Extraterritorial | 1971 |
| Wells Cathedral Scaffolding Ltd | Construction | 2025 |
| Wells Cathedral School, Limited | Education | 1956 |
| Wells Chiropractic & Osteopathy Centre Limited | Health & social care | 2009 |
| Wells City Carnival Limited | Arts & recreation | 1999 |
| Wells City Football Club Limited | Arts & recreation | 2026 |
| Wells City Scaffolding Ltd | Construction | 2022 |
| Wells Festival of Literature Limited | Arts & recreation | 1993 |
| Wells Food Festival CIC | Education | 2013 |
| Wells Holiday Park and Cottages Limited | Construction | 1997 |
| Wells Holiday Park Ltd | Administrative & support | 2007 |
| Wells in Mosaic Community Interest Company | Arts & recreation | 2019 |
| Wells Kitchens Ltd | Manufacturing | 2018 |
| Wells Locks Limited | Other services | 2017 |
| Wells Nails & Spa Ltd | Other services | 2022 |
| Wells Operatic Society Limited | Arts & recreation | 1978 |
| Wells Orthodontics Limited | Health & social care | 2009 |
| Wells RFC Trading Limited | Hospitality | 2019 |
| Wells Rugby Football Club Limited | Arts & recreation | 2009 |
| Wells Self Storage Limited | Extraterritorial | 2021 |
| Wells Soup C.I.C. | Health & social care | 2025 |
| Wells Technology Consultants Limited | Information & communication | 2024 |
| Wells Thai Limited | Hospitality | 2026 |
| Wells Theatre Festival (2019) Ltd | Arts & recreation | 2019 |
| Wells Tutors Ltd | Education | 2019 |
| Wells Vineyard Christian Fellowship | Other services | 2003 |
| Wells(Somerset)Golf Club,Limited | Arts & recreation | 1913 |
| Wemere Commercial Ltd | Real estate | 2024 |
| Wemere Ltd | Real estate | 2024 |
| Wessex Property Renovation Limited | Construction | 2014 |
| West Acre Investments Limited | Households | 2004 |
| West Hill Garden & Landscaping Services Ltd | Administrative & support | 2018 |
| Westbury Heart Limited | Real estate | 2024 |
| Weston Garden Machinery Limited | Extraterritorial | 2012 |
| WET Drinks Ltd | Manufacturing | 2025 |
| White Commercial Services Limited | Professional & scientific | 2025 |
| Whitetracks Whitebook Ltd | Wholesale & retail | 2020 |
| Whitetree Futures Limited | Financial services | 2022 |
| Whitetree Group Ltd | Professional & scientific | 2018 |
| Whitetree Resourcing Ltd | Professional & scientific | 2018 |
| Whitings Oxhey Limited | Construction | 2006 |
| Whole of Health Ltd | Wholesale & retail | 2024 |
| Wiin Aviation Ltd. | Transport & logistics | 2016 |
| Wilder Skies Ltd | Administrative & support | 2023 |
| Will-Power Automotive Ltd | Wholesale & retail | 2024 |
| Willie Ramsay Ltd | Other services | 2014 |
| Willsbridge House Management Company Limited | Households | 2010 |
| Wilton Investments Limited | Real estate | 2020 |
| Wilward Capital Limited | Professional & scientific | 2026 |
| Wimbleball Sailing Club Limited | Arts & recreation | 2021 |
| Wimsett Limited | Professional & scientific | 2012 |
| Wings Furniture and Interiors Limited | Manufacturing | 2014 |
| Winsley Holdings Ltd | Financial services | 2023 |
| Winton Advisory Limited | Information & communication | 2023 |
| Wisdom Energies Ltd | Wholesale & retail | 2025 |
| Wisdom Shield Community Interest Company | Information & communication | 2024 |
| Wise Garden Design Ltd | Professional & scientific | 2026 |
| Wisemill Ltd | Other services | 2021 |
| Wjgr Holdings Ltd | Financial services | 2026 |
| Wondergut Limited | Manufacturing | 2022 |
| Wood Procurement Management Limited | Other services | 2017 |
| Woodcrescent Limited | Real estate | 2007 |
| Woodcrescent Properties Limited | Construction | 1991 |
| Woodlands Farm (Shepton Mallet) Management Company Limited | Households | 2004 |
| Woodley Inc. Limited | Real estate | 1999 |
| Woodrat Ltd. | Manufacturing | 2003 |
| Woodrow Dairy Limited | Agriculture & fishing | 2023 |
| Wookey ALE Limited | Manufacturing | 2020 |
| Wookey Brewing Company Ltd | Extraterritorial | 2023 |
| Wookey Hole Caves Limited | Extraterritorial | 1931 |
| Work at the NIB Ltd | Real estate | 2018 |
| WORK4UTOPIA Ltd | Health & social care | 2016 |
| World Marketing Associates Limited | Wholesale & retail | 2025 |
| Worth Financial Planning Limited | Financial services | 2025 |
| Wright Associates Limited | Professional & scientific | 2009 |
| Wright Consult Ltd | Hospitality | 2019 |
| Wright Fires Ltd | Wholesale & retail | 2025 |
| Wyvern Slugs Ltd | Manufacturing | 2024 |
| Y Cwmni AER Glan Limited | Professional & scientific | 2025 |
| Yabai Picturehouse Ltd | Information & communication | 2021 |
| Yarley Moto Park Ltd | Arts & recreation | 2014 |