| Walton Sand Supplies Ltd | Wholesale & retail | 2008 |
| Wansdyke Farms Limited | Agriculture & fishing | 1977 |
| Wardens Lodge Limited | Financial services | 2011 |
| Wasabi Sportfishing Ltd | Other services | 2025 |
| Washbury House (Andover Road) Limited | Households | 1975 |
| Watchful EYE Limited | Construction | 1989 |
| Water Sky Getaways Ltd | Real estate | 2021 |
| Water Source International Ltd | Manufacturing | 2019 |
| Waterfield & White Limited | Professional & scientific | 2008 |
| Watermill Theatre Limited | Arts & recreation | 1970 |
| Watermill Theatre Productions Limited | Arts & recreation | 2014 |
| Watership Down Limited | Arts & recreation | 1975 |
| Watership Property Ltd | Real estate | 2010 |
| Watery Lane Farm Ltd | Wholesale & retail | 2022 |
| Watkins & Adams LLP | | 2016 |
| Way Power Consulting Ltd | Administrative & support | 2022 |
| Waynflete Management Group Limited | Real estate | 2016 |
| WB Lettings Ltd | Real estate | 2017 |
| Wbtas Ltd | Professional & scientific | 2008 |
| WCL Bars Ltd | Hospitality | 2019 |
| WD Lighting UK Limited | Administrative & support | 2001 |
| WD Property Developments UK Ltd | Construction | 2024 |
| WE Form Clay Ltd | Construction | 2023 |
| Web Content and Design Limited | Information & communication | 2012 |
| Web Tactics Ltd | Information & communication | 2011 |
| Websafe Solutions Limited | Information & communication | 2012 |
| WEC Holdings Limited | Financial services | 2017 |
| WEC Properties Limited | Real estate | 2017 |
| Wellness Collective PVT Ltd | Health & social care | 2023 |
| Wendover House Consultants Limited | Real estate | 1973 |
| Wentworth Court Newbury (2012) RTM Company Limited | Households | 2012 |
| Werdal Holdings Ltd | Professional & scientific | 2018 |
| Wessex Auto and Logistics Ltd | Agriculture & fishing | 2013 |
| Wessex Coin Limited | Wholesale & retail | 1995 |
| Wessex Investment Management Limited | Financial services | 2000 |
| Wessex Wealth Management Limited | Financial services | 2011 |
| West Berks Building Services LLP | | 2012 |
| West Berks Indoor Bowls Association Limited | Arts & recreation | 1983 |
| West Berks Limited | Wholesale & retail | 2025 |
| West Berkshire Citizens Advice Bureau | Administrative & support | 2006 |
| West Berkshire Community Solar Project Ltd | Construction | 2023 |
| West Berkshire Funeral Directors Limited | Other services | 2009 |
| West Berkshire Glazing Ltd | Construction | 2023 |
| West Berkshire Mencap | Health & social care | 1999 |
| West Berkshire Tax & Accounting Services Ltd | Administrative & support | 2016 |
| West Berkshire Training Consortium | Education | 1983 |
| West Berkshire Van Hire Limited | Administrative & support | 2010 |
| West Country News Media Limited | Information & communication | 1968 |
| West Empire Limited | Hospitality | 2024 |
| West END House Limited | Administrative & support | 2015 |
| West Fields Consulting Ltd | Information & communication | 2009 |
| West Mills Yard Management Company Limited | Real estate | 1988 |
| West W Holding Ltd | Hospitality | 2023 |
| West W Properties Ltd | Households | 2025 |
| West Woodhay Farms LLP | | 2017 |
| Westbrook Advisers Ltd | Professional & scientific | 2016 |
| Westcot Limited | Manufacturing | 2009 |
| Westerberg Limited | Agriculture & fishing | 2018 |
| Westerland Social Work Services Limited | Health & social care | 2015 |
| Western Area Heat Company Limited | Energy | 2013 |
| Western Automation Limited | Extraterritorial | 1963 |
| Westgate Installation Services Limited | Information & communication | 2017 |
| Westgate Strategy Limited | Professional & scientific | 2025 |
| Westlows Limited | Professional & scientific | 2017 |
| Westminster Delta Limited | Financial services | 2024 |
| Weston Autos Ltd | Wholesale & retail | 2018 |
| Westridge Commercial Limited | Real estate | 2025 |
| Westridge Holdings Limited | Real estate | 2019 |
| Westwood Place Management Company (Newbury) Limited | Households | 2000 |
| WFH Limited | Financial services | 2026 |
| WGB Consulting Limited | Administrative & support | 2019 |
| What Maisie Knew (the Musical) Limited | Arts & recreation | 2022 |
| Whatsupdox Ltd | Information & communication | 2022 |
| Wheeler Packaging Limited | Manufacturing | 2011 |
| Wheeler Pumps & Equipment Ltd | Manufacturing | 2004 |
| White Horse Contractors (Northern) Limited | Construction | 2019 |
| White Horse Contractors Limited | Construction | 2019 |
| White Lodge Consultants Limited | Professional & scientific | 2001 |
| White November Limited | Real estate | 2021 |
| Whitebridge Associates Limited | Administrative & support | 2010 |
| Whitebridge Solutions Group Ltd | Professional & scientific | 2010 |
| Whittle Coach & BUS Limited | Administrative & support | 2014 |
| Whittonditch Farm Management Limited | Households | 2017 |
| Whitway Estates Ltd | Construction | 2022 |
| WI Cricket View Ltd | Hospitality | 2025 |
| Widen My Horizon Ltd | Information & communication | 2012 |
| Wightman International Ltd | Wholesale & retail | 2009 |
| Wild Duck Construction Limited | Manufacturing | 2015 |
| Wild Invitation Ltd | Information & communication | 2021 |
| Wilde Works Property Services Ltd | Administrative & support | 2007 |
| Willes Road Freeholders Ltd | Households | 2010 |
| Willow Park Associates Ltd | Professional & scientific | 2002 |
| Wilson Laser Templating Limited | Other services | 2025 |
| Wilson-Valkenburg Property Management Company Limited | Households | 1964 |
| Wily Orchard Ltd | Administrative & support | 2014 |
| Wimbledon LR Service Centre Ltd | Wholesale & retail | 2007 |
| Winchester Court RTM Company Limited | Households | 2009 |
| Wind Forest Consultancy Limited | Financial services | 2005 |
| Window Clean UK Ltd | Administrative & support | 2001 |
| Wine for Life Limited | Professional & scientific | 2017 |