| Waikopua Ltd | Real estate | 2022 |
| Wake the King Ltd | Health & social care | 2021 |
| Walker Pipework Services Ltd. | Manufacturing | 1992 |
| Walmesley Medical Writing Limited | Professional & scientific | 2020 |
| Waridul Ltd | Hospitality | 2025 |
| Warmer Roof Ltd | Construction | 2016 |
| Waste Matters Ltd. | Water & waste | 1991 |
| Watermarked Technologies Limited | Information & communication | 2020 |
| Watson Athletic Threads Ltd | Wholesale & retail | 2023 |
| Watson Gym Equipment Ltd | Manufacturing | 2007 |
| Watson Gym Holdings Limited | Financial services | 2016 |
| Watsons Roofing Ltd | Construction | 2021 |
| Watts Electrical Contractors Ltd | Construction | 2024 |
| Watts Sales and Services Ltd | Wholesale & retail | 2019 |
| Waymkr Limited | Administrative & support | 2011 |
| Wayne Kelly Independent Funeral Directors Ltd | Other services | 2020 |
| Waypoint Maritime CIC | Health & social care | 2023 |
| Wayshow Ltd | Information & communication | 2012 |
| WE ARE Connectors Community Interest Company | Education | 2024 |
| WE ARE Neidin Limited | Information & communication | 2026 |
| WE Paint ANY Car Limited | Wholesale & retail | 2014 |
| WE Paint ANY Truck Limited | Wholesale & retail | 2014 |
| WE Paint ANY Van Limited | Wholesale & retail | 2014 |
| WE Power on Ltd | Other services | 2023 |
| WE Power on Support CIC | Other services | 2023 |
| Weare Health Associates Ltd | Professional & scientific | 2023 |
| Weaver Close Management Limited | Households | 2018 |
| Web Design & Stuff Ltd | Information & communication | 2026 |
| Webbh Ltd | Wholesale & retail | 2024 |
| Webzang Ltd | Information & communication | 2024 |
| Wedojapan Limited | Professional & scientific | 2013 |
| Weeks Transport Limited | Transport & logistics | 1988 |
| Wellie Life Ltd | Administrative & support | 2018 |
| Wessex Aggregates Ltd | Wholesale & retail | 2025 |
| Wessex Counselling Service | Health & social care | 1996 |
| West Hill House (Frome) Limited | Administrative & support | 2013 |
| Westbury Atmospheric Ltd | Professional & scientific | 2020 |
| Western Driver Training Ltd | Education | 2023 |
| Westway Workspace Ltd | Administrative & support | 2025 |
| Westwood 16 Limited | Real estate | 2014 |
| Weymouth Cider Company Ltd | Administrative & support | 2013 |
| WGP Group Ltd | Mining & quarrying | 2017 |
| Whatcombe Farm Nursery Ltd | Health & social care | 2017 |
| Whispers From the Wild Limited | Information & communication | 2012 |
| White Cloud Financial Limited | Financial services | 2012 |
| White Hart Trudoxhill Ltd | Hospitality | 2018 |
| White ROW Country Foods Limited | Wholesale & retail | 2006 |
| Whitefield Metals Limited | Wholesale & retail | 2013 |
| Whitehouse Renovation Limited | Construction | 2005 |
| Whittle and Wallis Ltd | Wholesale & retail | 2014 |
| Wild Feminine Retreats Ltd | Administrative & support | 2024 |
| Wild Women Ltd | Other services | 2025 |
| Wildblood Engineering Limited | Construction | 2010 |
| Wildcat Sauna Ltd | Other services | 2024 |
| Wildcountry Consultants Limited | Administrative & support | 2005 |
| Willow Conference and Events Ltd | Administrative & support | 2025 |
| Willow Vale Management Limited | Households | 2003 |
| Wilson Oxley Ltd | Administrative & support | 2018 |
| Wiltshire Smokehouse Ltd | Hospitality | 2015 |
| Withywood CIC | Arts & recreation | 2023 |
| Wizzfix Limited | Wholesale & retail | 2017 |
| WK Professional Car Valet Ltd | Administrative & support | 2008 |
| Wonderland Consulting Ltd | Administrative & support | 2018 |
| Wonderment Group Limited | Administrative & support | 2016 |
| Woodford Leisure Limited | Hospitality | 2003 |
| Woodforthetreesuk CIC | Information & communication | 2026 |
| Woodland View (Batcombe) Management Limited | Households | 2026 |
| Woodland View Development Ltd | Construction | 2026 |
| Woody Residentials Ltd | Construction | 2021 |
| Wool & Wire Holdings Ltd | Administrative & support | 2025 |
| Wool & Wire Ltd | Administrative & support | 2025 |
| Work UP Management Limited | Professional & scientific | 2023 |
| Working Progress Studio Ltd | Professional & scientific | 2017 |
| Worldclearing Ltd | Financial services | 2012 |
| WOW Beanbags Limited | Manufacturing | 2012 |
| WPR Project Services Ltd | Professional & scientific | 2011 |
| Wurlin Limited | Wholesale & retail | 2010 |
| Wyvern Supplies Limited | Professional & scientific | 2012 |
| Year of Colour Ltd | Arts & recreation | 2020 |
| Yellow Matilda Ltd | Hospitality | 2017 |
| Yellow Peach Ltd | Information & communication | 2019 |
| Yoke Ltd | Professional & scientific | 2011 |
| YOU ARE Real Ltd | Information & communication | 2019 |
| Youngs Court Management Limited | Households | 2020 |
| Your Storage Space Limited | Transport & logistics | 2013 |
| Youth Production Network CIC | Education | 2016 |
| Youwood Limited | Construction | 2011 |
| Youyo Ltd | Professional & scientific | 2019 |
| Yumble Limited | Manufacturing | 2011 |
| Zander Woollcombe Consulting Ltd | Professional & scientific | 2018 |
| Zangco Ltd | Hospitality | 2024 |
| Zeiser Limited | Manufacturing | 1983 |
| Zuper Ltd | Wholesale & retail | 2011 |
| Zzip Ltd | Professional & scientific | 2024 |