| W L Medical Ltd | Health & social care | 2018 |
| W Lewis Transport Ltd | Transport & logistics | 2025 |
| W&B Roofing Ltd | Construction | 2019 |
| W. Paard Limited | Hospitality | 2019 |
| W.A.Sherratt Limited | Real estate | 1938 |
| WAC Automotive Solutions Ltd | Wholesale & retail | 2025 |
| Wace Morgan Ltd | Professional & scientific | 2015 |
| Wade Solicitors Ltd | Professional & scientific | 2022 |
| Waggy Warehouse Shropshire Ltd | Other services | 2018 |
| Wags and Whiskers (Shrewsbury) Limited | Other services | 2015 |
| Waikato Milking Systems UK Limited | Agriculture & fishing | 2014 |
| WAKE2O Ltd | Wholesale & retail | 2022 |
| Walker Commercial Finance Limited | Financial services | 2015 |
| Walker Mews Residents Management Company Limited | Households | 2019 |
| Walker Tax Consultancy Limited | Professional & scientific | 2013 |
| Walkers Exterior Cleaning Ltd | Administrative & support | 2026 |
| Walkers Wines Limited | Wholesale & retail | 2002 |
| Wallace Co. Holdings Limited | Financial services | 2021 |
| Wallace Property PVT Ltd | Real estate | 2023 |
| Walsak Medicals Limited | Health & social care | 2023 |
| Walsall Road (Churchbridge) Management Limited | Households | 2007 |
| Walter & Lily Ltd | Real estate | 2023 |
| Walter Property Management Ltd | Real estate | 2023 |
| Walters Catering Limited | Hospitality | 2020 |
| Walters Group Operations Ltd | Professional & scientific | 2026 |
| Waqtech Ltd | Manufacturing | 2023 |
| Ward IT Consulting Limited | Information & communication | 2010 |
| Wardplace Limited | Real estate | 1980 |
| Warm Sure Ltd | Construction | 2023 |
| Warners Roses Limited | Agriculture & fishing | 2018 |
| Warom & Willcock Limited | Wholesale & retail | 2026 |
| Warren Farm Management Company Limited | Households | 1982 |
| Warren Glade Management Company Limited | Households | 2004 |
| Warrenby Close (2, 4, 6, 8, 10, 12) Freehold Limited | Real estate | 2011 |
| Warrior Operators Ltd | Construction | 2019 |
| Water Environment Management Ltd | Professional & scientific | 2025 |
| Watergate Mansions Residents Association Limited | Households | 1994 |
| Watergate Systems Ltd | Wholesale & retail | 2000 |
| Waterhousebryars Limited | Health & social care | 2019 |
| Waterpark House Management Company Limited | Households | 2004 |
| Waters View Consulting Limited | Professional & scientific | 2018 |
| Waterside (Abbey Meadows) Management Company Limited | Households | 2012 |
| Waterside at Riverwell (Block E) Management Company Limited | Households | 2021 |
| Waterside Meadow Management Company Ltd | Households | 2022 |
| Waterside Warrington (Management Company) Limited | Households | 1990 |
| Waterside West Commercial Ltd | Real estate | 2024 |
| Waterside West Holidays Limited | Hospitality | 2020 |
| Waterside West Investments Limited | Real estate | 2020 |
| Waterslade House Management Company Limited | Real estate | 2024 |
| Watkin Court Management Company Limited | Households | 1994 |
| Watling Street Residents Limited | Real estate | 2015 |
| Watman & Worth Web Ltd | Administrative & support | 2016 |
| Watson Watson Limited | Financial services | 2014 |
| Watson Watson Solicitors Limited | Professional & scientific | 2011 |
| Wattlesboro Dairy Limited | Agriculture & fishing | 2024 |
| Wattlesboro Developments Limited | Construction | 2024 |
| Wattlesboro Holdings Limited | Financial services | 2024 |
| Wattlesboro Renewables Ltd | Energy | 2011 |
| Wattlesborough Helicopters Ltd | Administrative & support | 2024 |
| Wave-Length Social Marketing CIC | Professional & scientific | 2011 |
| Waverley Garage Ltd | Real estate | 1934 |
| Waxstop Room 3 by Vanessa Limited | Other services | 2023 |
| Wayforward (Shropshire) Limited | Agriculture & fishing | 2002 |
| WB Supplies Ltd | Wholesale & retail | 2023 |
| WDM HC Services Ltd | Health & social care | 2025 |
| WE ARE Champions Limited | Health & social care | 2023 |
| WE ARE Veterans C.I.C. | Other services | 2019 |
| WE Know Promo Ltd | Wholesale & retail | 2025 |
| WE Run Ltd | Arts & recreation | 2014 |
| Weavers Rise Management Company Limited | Households | 2019 |
| Web Art Ltd | Information & communication | 2015 |
| Webber Phillips Limited | Professional & scientific | 2014 |
| Webify Plus Ltd | Information & communication | 2024 |
| Wechange.Ai Ltd | Information & communication | 2024 |
| Weco Build Ltd | Construction | 2021 |
| Wedgwood Hotel Ltd | Hospitality | 2024 |
| Welch & Ashton Developments Limited | Construction | 2026 |
| Wellesley Medical Limited | Professional & scientific | 2026 |
| Wellington Grange (Pocklington) Management Limited | Real estate | 2017 |
| Wellington Road (Leeds) Management Company Limited | Households | 2005 |
| Wellmeadow Limited | Professional & scientific | 2010 |
| Wellmed Health Limited | Health & social care | 2024 |
| WEM Barbers Ltd | Other services | 2024 |
| WEM Events Ltd | Administrative & support | 2022 |
| WEM Lavender Ltd | Agriculture & fishing | 2022 |
| WEM Motors Limited | Extraterritorial | 2022 |
| WEM Pizza Land Limited | Other services | 2021 |
| WEM Town Football Club Limited | Arts & recreation | 2023 |
| Wem's Kitchen Limited | Hospitality | 2019 |
| Wems Fryer Limited | Hospitality | 2023 |
| Wenlock Edge Developments Ltd | Real estate | 2025 |
| Wenlock Fine Foods Limited | Professional & scientific | 2013 |
| Wenlock Hill Consulting Limited | Professional & scientific | 2021 |
| Wenlock Investments Ltd | Financial services | 2019 |
| Wesleyan Court Management Company Limited | Households | 2005 |
| Wessex Animal Health Limited | Wholesale & retail | 1990 |
| Wessex Bridge Limited | Health & social care | 2024 |
| West Border Cars Limited | Wholesale & retail | 2006 |
| West Heath (Birmingham) Management Limited | Households | 2011 |
| West Mercia Fork Truck Holdings Limited | Financial services | 2021 |