| Wessex Leak Detection Ltd | Transport & logistics | 2020 |
| Wessex Macadams Holdings Limited | Construction | 2019 |
| Wessex Macadams Limited | Construction | 1984 |
| Wessex Manufacturing Limited | Manufacturing | 2007 |
| Wessex Optical Ltd | Health & social care | 2016 |
| Wessex Park Limited | Construction | 2007 |
| Wessex Physiotherapy and Sports Injury Clinics Limited | Health & social care | 2003 |
| Wessex Psychiatry Limited | Health & social care | 2017 |
| Wessex Sports Direct Ltd | Wholesale & retail | 2010 |
| Wessex Surfacing Limited | Construction | 2014 |
| Wessex Taekwondo Limited | Arts & recreation | 2012 |
| Wessex Wellbeing Ltd | Arts & recreation | 2021 |
| Wessex Wellness Group Ltd | Financial services | 2024 |
| West Moors Fine Foods Limited | Wholesale & retail | 2010 |
| West View Auction & Sales Limited | Wholesale & retail | 2022 |
| West Yorkshire Metrology Limited | Professional & scientific | 2026 |
| Westerdale Consulting Limited | Professional & scientific | 2019 |
| Western Association of Ballet Schools | Education | 1979 |
| Westward Marine Holdings Limited | Wholesale & retail | 2017 |
| Westworth Farm Management Company Limited | Households | 1997 |
| Weymouth Optical Ltd | Health & social care | 2016 |
| Weymouth Pavilion CIC | Arts & recreation | 2013 |
| WF Enterprise C.I.C. | Wholesale & retail | 2020 |
| Wflowio Limited | Information & communication | 2020 |
| WH Group Ltd | Administrative & support | 2022 |
| WH Housing Limited | Construction | 2020 |
| Whale Coast Limited | Professional & scientific | 2016 |
| Whatling Partners Limited | Information & communication | 2026 |
| Wheconsult Limited | Mining & quarrying | 2018 |
| Wheel Haus Performance Ltd | Manufacturing | 2025 |
| Wheelbarrow Consulting Limited | Information & communication | 2008 |
| Wheelsnwins Ltd | Arts & recreation | 2026 |
| Wheeve Consulting Ltd. | Information & communication | 2018 |
| Whelan Irrigation Services Limited | Water & waste | 2020 |
| Whipsmart Research Limited | Professional & scientific | 2026 |
| White Horse Lane Management Ltd | Households | 2022 |
| White Horse Remedies Limited | Wholesale & retail | 2020 |
| White Label Wimborne Ltd | Professional & scientific | 2020 |
| White Nightie Holding Ltd | Financial services | 2024 |
| White Nightie Limited | Wholesale & retail | 2016 |
| White of Witchampton Limited | Professional & scientific | 1997 |
| White Reef Data Limited | Information & communication | 2018 |
| White Space Consulting Ltd | Professional & scientific | 2018 |
| Whiteflow Solutions Ltd | Information & communication | 2026 |
| Whitemoor Developments Limited | Real estate | 2003 |
| Whitethorn Management Limited | Information & communication | 2022 |
| Whitlow Financial Planning Limited | Financial services | 2004 |
| WHW Holdings Limited | Financial services | 2020 |
| Wild Baby Yoga Ltd | Wholesale & retail | 2020 |
| Wilden Site Services Limited | Construction | 2026 |
| Wilder Leason Limited | Information & communication | 2025 |
| Wildflower Ceremonies Ltd | Arts & recreation | 2019 |
| Wildings Consulting Limited | Professional & scientific | 2023 |
| Wildwood Consulting Services Ltd | Information & communication | 2016 |
| Wildwood Solutions Limited | Professional & scientific | 2025 |
| Wilkes Property Ltd | Construction | 2025 |
| Will Lewis Digital Consulting Limited | Information & communication | 2021 |
| William Douglas Packman Ltd | Manufacturing | 2021 |
| William Fortescue Ltd | Professional & scientific | 2021 |
| William GUY Hairdressing Limited | Other services | 2014 |
| William GUY Hairdressing Romsey Ltd | Other services | 2025 |
| William GUY Hairdressing Westbourne Ltd | Other services | 2023 |
| William Watson & Co. Limited | Information & communication | 1995 |
| Williams Facilities Management Limited | Administrative & support | 2024 |
| Willow Dorset Ltd | Administrative & support | 2022 |
| Willows (Devon) Limited | Education | 2004 |
| Willows (Somerset) Limited | Health & social care | 2005 |
| Willows 21 Ltd | Education | 2018 |
| Willtom Limited | Construction | 2008 |
| Wilmot PS Ltd | Professional & scientific | 2016 |
| Wilson Brown Live Events Ltd | Administrative & support | 2005 |
| Wilson Hutton Associates Limited | Professional & scientific | 2014 |
| Wimborne Air Solutions Ltd | Construction | 2025 |
| Wimborne and Poole Skip Hire Ltd | Water & waste | 2008 |
| Wimborne Beer Company Limited | Manufacturing | 2013 |
| Wimborne BID Limited | Professional & scientific | 2009 |
| Wimborne Business Systems Limited | Other services | 2000 |
| Wimborne Car Sales Ltd | Wholesale & retail | 2018 |
| Wimborne Car Sourcing Ltd | Wholesale & retail | 2025 |
| Wimborne Chiropody Limited | Health & social care | 2011 |
| Wimborne Cider Company Limited | Manufacturing | 2012 |
| Wimborne Community Events Ltd | Arts & recreation | 2023 |
| Wimborne Consultancy Services Limited | Professional & scientific | 2011 |
| Wimborne Consulting Services Ltd | Professional & scientific | 2024 |
| Wimborne Contracting Ltd | Professional & scientific | 2023 |
| Wimborne Demolition & Waste Management Limited | Water & waste | 2016 |
| Wimborne Double Glazing Limited | Construction | 2016 |
| Wimborne Enterprise Ltd | Hospitality | 2016 |
| Wimborne First School Play Clubs | Education | 1994 |
| Wimborne Glass Limited | Wholesale & retail | 2002 |
| Wimborne Holdings Ltd | Real estate | 2025 |
| Wimborne Insurance Brokers Limited | Financial services | 2013 |
| Wimborne Investments Limited | Professional & scientific | 2008 |
| Wimborne Letting Ltd | Financial services | 2025 |
| Wimborne Market Ltd | Extraterritorial | 2021 |
| Wimborne Medical Services Limited | Health & social care | 2011 |
| Wimborne Minster Model Town | Health & social care | 1987 |
| Wimborne Motors (Holdings) Ltd. | Wholesale & retail | 1995 |
| Wimborne Motors (Sales) Ltd. | Wholesale & retail | 1995 |
| Wimborne Motors Factors Limited | Wholesale & retail | 2009 |