| Warren Lane Limited | Construction | 2022 |
| Waterlip Developments Limited | Real estate | 2009 |
| Waterlip Electrical Contracting Limited | Construction | 2015 |
| Waterlip Ltd | Wholesale & retail | 2024 |
| Waterside Build Ltd | Construction | 2017 |
| Waterside Developers Ltd | Real estate | 2017 |
| Waterson Project Services Ltd | Construction | 2019 |
| Watertown Limited | Households | 1985 |
| Wave Hack Ltd | Administrative & support | 2015 |
| WB Fulfilment Ltd. | Wholesale & retail | 2024 |
| WE HIT Different LLP | | 2025 |
| Wedmore IT Ltd | Information & communication | 2017 |
| Wellnest Care Ltd | Health & social care | 2025 |
| Wessex Bulk Ltd | Transport & logistics | 2024 |
| Wessex Truck and Trailer Supplies Limited | Wholesale & retail | 2008 |
| West Country Boilers Limited | Wholesale & retail | 2025 |
| West Country Food Services Limited | Wholesale & retail | 2016 |
| West One Management Consulting Limited | Information & communication | 2011 |
| West Park Management Company Limited | Households | 1980 |
| Westborn Contracting Limited | Construction | 2018 |
| Westlea Holdings Limited | Real estate | 1992 |
| Weymouth Flooring Limited | Construction | 2019 |
| Weymouth Holdings Ltd | Financial services | 2021 |
| Whaddon Farm Solar Park Limited | Energy | 2021 |
| White Cedar Properties Ltd | Hospitality | 2017 |
| White Lake Cheeses Limited | Manufacturing | 2003 |
| Whitebeam Fundraising Ltd | Professional & scientific | 2025 |
| Whitstone Court (Shepton Mallet) Management Company Limited | Real estate | 1988 |
| Whitstone School Academy Trust | Education | 2011 |
| Wild Juniper Ltd | Wholesale & retail | 2023 |
| Wild Legacy CIC | Professional & scientific | 2025 |
| Willmott's Transport Limited | Transport & logistics | 1961 |
| Willow Nursery and Pre-School Limited | Education | 2006 |
| Willstock Farm Management Company Limited | Real estate | 2022 |
| Wilverley Court Management Company Ltd | Households | 2018 |
| Winford Court Property Company (Bristol) Limited | Households | 1959 |
| WKJ Limited | Health & social care | 2010 |
| Wobbly Carrot Entertainment Ltd | Arts & recreation | 2012 |
| Wolf Groundworks Ltd | Construction | 2023 |
| Wolff Stone Limited | Manufacturing | 1999 |
| Woodward Medical Ltd | Health & social care | 2022 |
| World OUT There Films Limited | Information & communication | 2016 |
| World's END Farm Solar Park Limited | Energy | 2019 |
| Worleys Cider Limited | Manufacturing | 2009 |
| Worminster Farms Limited | Professional & scientific | 1955 |
| Worminster Food & Drink Ltd | Hospitality | 2021 |
| Wraxall Estates Ltd | Construction | 2024 |
| Wrayco Ltd | Professional & scientific | 2016 |
| WTL Workshops Limited | Professional & scientific | 2009 |
| WTS Events Ltd | Administrative & support | 2023 |
| WVQ Consultant Ltd | Information & communication | 2014 |
| WWH Consulting Limited | Professional & scientific | 2016 |
| Wynne at Maths Ltd | Education | 2024 |
| Xgraffix Ltd | Manufacturing | 2003 |
| Yellow Ice Retail Ltd | Wholesale & retail | 2026 |
| Yeovil Gold Carwash Ltd | Other services | 2024 |
| York House (Bristol) Management Company Limited | Households | 1998 |
| Young Beauty Limited | Other services | 2011 |
| Your Bathroom Company Ltd | Construction | 2011 |
| Your Letting Ltd | Real estate | 2021 |
| Yoyo's Restaurant Limited | Hospitality | 2019 |
| Z.W.Millard Roofing & Cladding Specialist Ltd | Construction | 2018 |
| ZD Consultancy Ltd | Professional & scientific | 2022 |
| Zealousy Limited | Wholesale & retail | 2025 |
| Zinc & Co Limited | Wholesale & retail | 2014 |
| Zinnia Labs Ltd | Information & communication | 2024 |
| Zonecliffe Limited | Real estate | 1986 |
| ZT Solutions (Holdings) Ltd | Administrative & support | 2016 |