| W J Properties Limited | Real estate | 1986 |
| W T Bricklayers Ltd | Construction | 2022 |
| W&Db (Finance) Limited | Extraterritorial | 1999 |
| W&J Heating Solutions Ltd | Construction | 2024 |
| W&V Alehouse Ltd | Hospitality | 2025 |
| W. Brindley Garages (Cannock) Limited | Wholesale & retail | 1972 |
| W. Brindley Garages (Holdings) Limited | Financial services | 2024 |
| W. E. Smith Holdings Limited | Financial services | 1996 |
| W.A.D. Auto Developments Limited | Wholesale & retail | 1979 |
| W.Brindley(Garages)Limited | Wholesale & retail | 1937 |
| W.E.Dawes(Bromsgrove)Limited | Real estate | 1956 |
| W.H. Tildesley Investments Holdings Limited | Professional & scientific | 2016 |
| W.H. Tildesley Investments Limited | Professional & scientific | 2016 |
| W.V.H Auto Services Ltd | Wholesale & retail | 2026 |
| W.W. (1990) Limited | Arts & recreation | 1990 |
| W1 Investments Limited | Financial services | 2011 |
| Wadala Home Improvement Ltd | Construction | 2025 |
| Waddens Brook Lane Store Limited | Wholesale & retail | 2015 |
| Waddens Brook Parcel Limited | Transport & logistics | 2016 |
| Wade's Express Limited | Transport & logistics | 2019 |
| Wahab Enterprise Services Ltd | Transport & logistics | 2026 |
| Waheguru Property Group Ltd | Real estate | 2026 |
| Waheguru Yoga Ltd | Health & social care | 2025 |
| Wahla Transport Ltd | Wholesale & retail | 2021 |
| Wailing Wall Prayer Network | Other services | 2023 |
| Wains Solutions Ltd | Information & communication | 2026 |
| Wainwright Electrical Services Limited | Manufacturing | 2003 |
| Wajs Investments Ltd | Real estate | 2025 |
| Walcott Construction Consultant Limited | Professional & scientific | 2014 |
| Walfred Properties Limited | Real estate | 2021 |
| Walker Investments (Birmingham) Limited | Real estate | 1996 |
| Walkway Fabrications Limited | Professional & scientific | 1984 |
| Wall Heath Design Limited | Construction | 2019 |
| Wall Heath Investments Ltd | Real estate | 2009 |
| Wallbank Fire and Security Limited | Administrative & support | 2025 |
| Wallo Hub Ltd | Wholesale & retail | 2024 |
| Wally's of Stoke Ltd | Hospitality | 2023 |
| Walnut Day Care CIC | Health & social care | 2025 |
| Walsall Power Limited | Energy | 2022 |
| Walsall Skin Clinic Ltd | Health & social care | 2025 |
| Walsh Construction Holdings Limited | Financial services | 2004 |
| Walsh Construction Limited | Construction | 1960 |
| Walter Dean & Co. Limited | Administrative & support | 2009 |
| Walter Lawrence Limited | Professional & scientific | 1919 |
| Walter Lawrence& SON Limited | Professional & scientific | 1963 |
| Waltfield Limited | Agriculture & fishing | 2019 |
| Wamba Limited | Hospitality | 2022 |
| Want Clothing Limited | Wholesale & retail | 2010 |
| Wapwow Ltd | Arts & recreation | 2022 |
| Waraich GPS Limited | Health & social care | 2025 |
| Ward Avenue Limited | Real estate | 2017 |
| Ward Medical Consulting Limited | Health & social care | 2014 |
| Warden Investments Limited | Financial services | 1908 |
| Wards Poultry Limited | Transport & logistics | 1958 |
| Warefinds Ltd | Wholesale & retail | 2025 |
| Waresley Park 2022 Limited | Real estate | 2022 |
| Waresley Park Limited | Real estate | 2008 |
| Warley Motor Point Limited | Wholesale & retail | 2003 |
| Warm Home GAS & Plumbing Ltd | Construction | 2026 |
| Warm Sure Heating Ltd | Manufacturing | 2018 |
| Warmth Belmdcc Ltd | Hospitality | 2023 |
| Warmzone GAS & Plumbing Ltd | Construction | 2025 |
| Warriors of Panjab Ltd | Transport & logistics | 2025 |
| Warstone Chippy Ltd | Hospitality | 2017 |
| Warstones Fisheries Ltd | Hospitality | 2014 |
| Warstones Ltd | Construction | 2021 |
| Warstones Phones Limited | Real estate | 2020 |
| Warwick Conservatories Limited | Construction | 1999 |
| Warwick Fascias Limited | Construction | 2006 |
| Warwick Glass Limited | Construction | 1996 |
| Warwick Properties Holding Limited | Real estate | 2026 |
| Warwickshire Recycled Aggregates Limited | Extraterritorial | 2023 |
| Wasim Construction Ltd | Construction | 2023 |
| Waste Interim & Consultancy Services Limited | Professional & scientific | 2020 |
| Waste Technology Solutions Limited | Manufacturing | 2017 |
| WASTE2WORTHUK Ltd | Wholesale & retail | 2023 |
| Watchers Film Productions Limited | Professional & scientific | 2022 |
| Water Filter MAN Ltd | Administrative & support | 2008 |
| Waterfall RS Ltd | Construction | 2015 |
| Watershed Care Limited | Health & social care | 2019 |
| Waterside Park Roadside (Ashbourne) Management Company Limited | Real estate | 2008 |
| Watson Estates (Stafford) Limited | Real estate | 2015 |
| Watstech Limited | Professional & scientific | 2005 |
| Watstech Property Ltd | Real estate | 2025 |
| Wattville Developments Limited | Construction | 2025 |
| Wave Digital Agency Limited | Manufacturing | 2022 |
| Wave Enterprises Ltd | Information & communication | 2026 |
| Waylands Farm Limited | Real estate | 2017 |
| Waylands Storage Limited | Other services | 2024 |
| Waziar Ltd | Hospitality | 2024 |
| WB Electrical & Security Solutions Limited | Manufacturing | 2016 |
| WB Heating Limited | Construction | 2020 |
| WB Mechanical Services Limited | Manufacturing | 2016 |
| WBC Training Club Ltd | Arts & recreation | 2019 |
| WC Transport Light Haulage Ltd | Transport & logistics | 2025 |
| WD Bespoke Joinery Limited | Manufacturing | 2012 |
| WD Services Limited | Professional & scientific | 2019 |
| WE ARE Alan Sugar Entrepreneurs Community Support Group Limited | Administrative & support | 2023 |
| WE ARE MUD Limited | Arts & recreation | 2004 |
| WE ARE Pinpoint Limited | Professional & scientific | 2015 |