| Widekey Commercial Properties Ltd | Real estate | 2026 |
| Widekey Limited | Real estate | 1989 |
| Wight Quays Sailing Ltd | Professional & scientific | 2021 |
| Wihtl Limited | Professional & scientific | 2018 |
| Wilbur Homes Ltd | Real estate | 2021 |
| Wild & Ginger Ltd | Hospitality | 2021 |
| Wild & Tamed Gardens Ltd | Other services | 2025 |
| Wild Boar Enterprises Ltd | Real estate | 2023 |
| Wild Life Investments LLP | | 2023 |
| Wild Reset Ltd | Professional & scientific | 2023 |
| Wild Vision Ltd | Professional & scientific | 2020 |
| Wildcard Films Limited | Arts & recreation | 2009 |
| Wildwick Limited | Real estate | 2000 |
| Wildwood Investments Limited | Real estate | 2005 |
| Wilfred Watton & Son,Limited | Real estate | 1947 |
| Will Developments Ltd | Administrative & support | 2018 |
| Will Irvine Limited | Transport & logistics | 2016 |
| Will Jepson Property Ltd | Real estate | 2024 |
| Willbar HMO LLP | | 2021 |
| Willett Properties Limited | Real estate | 2005 |
| William Irons Ltd | Financial services | 2014 |
| William Oliver Holdings Company Limited | Professional & scientific | 2016 |
| Williams Electrical Contracting (GB) Limited | Construction | 2020 |
| Williams Energy Ltd | Professional & scientific | 2018 |
| Williams Energy Services Limited | Professional & scientific | 2014 |
| Williams Holdings Group (GB) Limited | Financial services | 2021 |
| Williams Renewable Energy (GB) Limited | Construction | 2023 |
| Williams Tech Solutions (GB) Limited | Construction | 2024 |
| Willow and Write Ltd | Wholesale & retail | 2025 |
| Willow Court (Throop) Limited | Households | 1998 |
| Willow Developments (UK) Limited | Extraterritorial | 2005 |
| Willow Interiors Southern Limited | Wholesale & retail | 1999 |
| Willow Lawns Management Company Limited | Households | 1994 |
| Willton Homes Houghton Limited | Construction | 2017 |
| Willton Homes West Limited | Construction | 2014 |
| Wilmic Property Ltd | Real estate | 2025 |
| Wilson Property Law Ltd | Professional & scientific | 2024 |
| Wilson's Wills Limited | Professional & scientific | 2021 |
| Wilton Joinery Limited | Manufacturing | 2015 |
| Wilton Place Freehold Limited | Real estate | 2002 |
| Wiltscom Limited | Construction | 2025 |
| Wiltshire Shutters Ltd | Construction | 2022 |
| Wilverley Court Freehold Limited | Households | 2006 |
| Wilverley Interiors Limited | Construction | 1999 |
| Wimborne Appliance Services Limited | Other services | 2013 |
| Wimborne Barbers BH9 Ltd | Other services | 2026 |
| Wimborne Consultancy Ltd | Extraterritorial | 2015 |
| Wimborne Heating and Plumbing Services Ltd. | Manufacturing | 1999 |
| Wimborne Home Improvements Limited | Construction | 2013 |
| Wimborne Road Limited | Real estate | 2024 |
| Wimborne Road Management Company Limited | Households | 2004 |
| Wimborne Roofing Limited | Professional & scientific | 2008 |
| Wimborne Windows Limited | Construction | 1996 |
| Winchester Investments LLP | | 2021 |
| Wincombe M.O.T. & Repair Centre Limited | Wholesale & retail | 2008 |
| Wincombe Payrolls Limited | Professional & scientific | 2022 |
| Windham Mews (Management) Limited | Households | 1986 |
| Windham Road Flat Management Company Ltd | Households | 2019 |
| Windser Real Estates Limited | Real estate | 2016 |
| Windsor Close Flat Management Limited | Households | 2020 |
| Windsor Court Care Limited | Health & social care | 2015 |
| Windsor Court RTM Company Limited | Households | 2019 |
| Windsor Road Management Company Limited | Households | 2008 |
| Windward Management Limited | Households | 2019 |
| Winederful Ltd | Wholesale & retail | 2020 |
| Wingfield Court (BH1) RTM Company Ltd | Households | 2019 |
| Wingfield Court RTM Company Limited | Administrative & support | 2007 |
| Wingfield Grange Management Company Limited | Households | 1996 |
| Wingfield Management Company Limited | Households | 1997 |
| Winhall Ltd | Manufacturing | 2021 |
| Winkle - Bottom Ltd | Professional & scientific | 2015 |
| Winning Agency Ltd | Professional & scientific | 2018 |
| Winning Street Limited | Financial services | 2021 |
| Winslade and Watton Construction Limited | Construction | 1987 |
| Winsor Group Limited | Other services | 2019 |
| Winston Avenue Freehold Limited | Households | 2005 |
| Winston Court 14 Melville Road Winton RTM Company Limited | Households | 2015 |
| Winston Hide Limited | Wholesale & retail | 2024 |
| Winston Moses Pidakala Ltd | Health & social care | 2016 |
| Wintercap Limited | Information & communication | 2018 |
| Winton ABC Ltd | Arts & recreation | 2023 |
| Winton BH9 Ltd | Wholesale & retail | 2023 |
| Winton Launderette Ltd | Other services | 2025 |
| Wintonpromotions Limited | Wholesale & retail | 2025 |
| Wiredin Ltd | Construction | 2022 |
| WISDOMS123 Ltd | Education | 2021 |
| Wiselers Ltd | Professional & scientific | 2024 |
| Wishbone Productions Limited | Information & communication | 2025 |
| Wishes and Dreams Entertainment Limited | Arts & recreation | 2024 |
| Wiskat Limited | Wholesale & retail | 2017 |
| Wisteria Landscapes Ltd | Administrative & support | 2009 |
| Wisteria Lodge (Management) Limited | Households | 2022 |
| Wistmans Cafe Ltd | Hospitality | 2020 |
| With Nikoleta UK Ltd | Education | 2023 |
| Withinnovation Limited | Other services | 2017 |
| Wizio Limited | Information & communication | 2021 |
| Wizio London Ltd | Information & communication | 2023 |
| WK Accountancy Services Ltd | Professional & scientific | 2017 |
| WM Creations Limited | Wholesale & retail | 2025 |
| Wmspoz Ltd | Health & social care | 2026 |