| Vudu Clothing Limited | Wholesale & retail | 2024 |
| Vwch Limited | Administrative & support | 2013 |
| W B Hampshire Limited | Education | 2012 |
| W Bowyer Limited | Professional & scientific | 2022 |
| W F Jiang Limited | Real estate | 2014 |
| W J J (Winchester) Limited | Real estate | 2003 |
| W&H Marketing Ltd | Other services | 2018 |
| W. Cornish Limited | Other services | 1993 |
| W.H.D.Seed Growers Limited | Other services | 1947 |
| W.H.Yeatman & Sons,Limited | Real estate | 1914 |
| W.Klak Ltd | Transport & logistics | 2014 |
| Wades Asset Management Ltd | Financial services | 2016 |
| Wadwick Farm Limited | Agriculture & fishing | 2006 |
| Waffles & Cream Ltd | Hospitality | 2018 |
| Wags and Walks Pet Service Ltd | Wholesale & retail | 2022 |
| Wahoo Food Ltd | Hospitality | 2023 |
| Wake Standard Ltd | Manufacturing | 2026 |
| Wakeman Consulting Ltd | Professional & scientific | 2020 |
| Walcote Health Ltd | Health & social care | 2014 |
| Walk Cycle Ltd | Extraterritorial | 2026 |
| Walker Street Parking Limited | Households | 1997 |
| Walker's Tyre Service Limited | Extraterritorial | 1961 |
| Walkham Park Management Company Limited | Other services | 1988 |
| Walktrue Ltd | Professional & scientific | 2017 |
| Walkway Books Limited | Information & communication | 2022 |
| Wallace Properties Ltd | Real estate | 2017 |
| Wallops Wood Dairy Limited | Professional & scientific | 2013 |
| Walter & Florence Limited | Wholesale & retail | 2017 |
| Walworth Farms Limited | Agriculture & fishing | 2012 |
| Warambi Ltd | Professional & scientific | 2013 |
| Ward Design Ltd | Professional & scientific | 2023 |
| Warner & Richardson LLP | | 2018 |
| Warrant Ltd | Information & communication | 2026 |
| Warren Farm (Crawley) Limited | Agriculture & fishing | 1996 |
| Warrens of Winchester Limited | Wholesale & retail | 2010 |
| Warrens Office Holdings Limited | Financial services | 2024 |
| Warrens Office Ltd | Administrative & support | 1982 |
| Warwick Martel Limited | Real estate | 1995 |
| Water Features Ltd | Administrative & support | 2011 |
| Waterharvest Limited | Professional & scientific | 2008 |
| Waterside Consultancy (Hampshire) Limited | Administrative & support | 2007 |
| Watley Classics Limited | Wholesale & retail | 2022 |
| Watt Lifestyle Limited | Health & social care | 2025 |
| Wattsup Communications Ltd | Information & communication | 2017 |
| Wave Vehicle Leasing Ltd | Administrative & support | 2025 |
| Waypoint Digital Marketing Limited | Professional & scientific | 2012 |
| WB Financial (UK) Ltd | Financial services | 2021 |
| WB Winchester Ltd | Other services | 2019 |
| WDS 2020 Limited | Arts & recreation | 2020 |
| WE ARE Counterpoint Ltd | Professional & scientific | 2018 |
| WE ARE Formation Limited | Arts & recreation | 2012 |
| WE ARE Outliers Ltd | Information & communication | 2023 |
| WE ARE Simon Says Limited | Professional & scientific | 2023 |
| WE Mean This Ltd | Professional & scientific | 2016 |
| WE Sell Small Cars Limited | Wholesale & retail | 2016 |
| Weavers (Aylesbury) Limited | Construction | 2012 |
| Webber Software Solutions Ltd | Professional & scientific | 2022 |
| Weeke Manor Management Limited | Households | 2004 |
| Weir Total Supply Chain Sustainability Ltd | Professional & scientific | 2006 |
| Weir Tscs Ltd | Professional & scientific | 2015 |
| Weiweili Limited | Wholesale & retail | 2025 |
| Welborne CG FRY Limited | Construction | 2022 |
| Welborne Commercial Park Limited | Construction | 2026 |
| Welborne Corner Cafe Limited | Hospitality | 2026 |
| Welborne District Centre Ltd | Construction | 2022 |
| Welborne Group Limited | Professional & scientific | 2023 |
| Welborne Homes Limited | Construction | 2022 |
| Welborne Housing Limited | Construction | 2022 |
| Welborne Land Limited | Construction | 2017 |
| Welborne PYE Limited | Construction | 2022 |
| Welborne Science and Technology Park Limited | Construction | 2022 |
| Welborne Thakeham Limited | Construction | 2022 |
| Welborne Village Centre Limited | Construction | 2022 |
| Welding Engineering Consultancy Ltd | Professional & scientific | 2018 |
| Weldshop & Fabrication Limited | Manufacturing | 1996 |
| Welford Events Limited | Arts & recreation | 2015 |
| Welford Farms Limited | Agriculture & fishing | 1959 |
| Wellingborough Tyres Limited | Extraterritorial | 2003 |
| Wellington Mmxix | Professional & scientific | 2019 |
| Wellington Place (Flats) Limited | Households | 2009 |
| Wellington Place Limited | Households | 2004 |
| Wellness for Living Limited | Arts & recreation | 2024 |
| Wellowmed Limited | Health & social care | 2019 |
| Wells & Co. Financial Planning LLP | | 2016 |
| Wellstone Limited | Professional & scientific | 2011 |
| Wellstone Technologies Limited | Professional & scientific | 2015 |
| Welwyn Tyre & MOT Centre Limited | Extraterritorial | 2009 |
| Werner Capital LLP | | 2008 |
| Werner Developments LLP | | 2013 |
| Wessex Administration Services Limited | Financial services | 1984 |
| Wessex Children's Hospice Trust | Health & social care | 1991 |
| Wessex Court Managements Limited | Households | 2001 |
| Wessex Dizziness and Hearing Ltd | Health & social care | 2024 |
| Wessex Garden Room Company Ltd | Construction | 2021 |
| Wessex Glyndebourne Association | Other services | 2007 |
| Wessex Group Holdings Limited | Financial services | 2025 |
| Wessex Gynaecology Ltd | Health & social care | 2019 |
| Wessex Neurology Ltd | Health & social care | 2011 |
| Wessex Pharma Consulting Ltd | Professional & scientific | 2017 |
| Wessex Pharma Services Ltd | Professional & scientific | 2005 |