| West Bromwich Albion Football Club Limited | Arts & recreation | 1996 |
| West Bromwich Albion Heritage Limited | Arts & recreation | 1891 |
| West Mercia Radiators Limited | Wholesale & retail | 2007 |
| West Midland Finance Company Limited | Financial services | 1987 |
| West Midland Vehicles Limited | Financial services | 1981 |
| West Midland Washing Machines (Willenhall) Limited | Manufacturing | 1976 |
| West Midlands Bridge Club Limited | Arts & recreation | 1975 |
| West Midlands Chiropractic Clinic Limited | Health & social care | 2007 |
| West Midlands Foundry Co. Limited | Manufacturing | 1962 |
| West Midlands Leisure and Entertainments Limited | | 1986 |
| West Midlands Motorcycle Centre Limited | Wholesale & retail | 2001 |
| West Midlands Taverns (Holdings) Limited | Hospitality | 1979 |
| West Solutions Ltd | Information & communication | 1999 |
| Westbranch Limited | Real estate | 1980 |
| Westbuild Construction Limited | Construction | 1999 |
| Western Growers Limited | Agriculture & fishing | 2005 |
| Western Orientals UK Ltd | Wholesale & retail | 2020 |
| Westlands Associates Limited | Professional & scientific | 2003 |
| Westley Group Limited | Manufacturing | 1973 |
| Westley Plastics Limited | Manufacturing | 1964 |
| Westminster Properties (UK) Limited | Real estate | 2004 |
| Weston Beamor Holdings Limited | Financial services | 2003 |
| Westwood Global Limited | Information & communication | 2007 |
| Westwood Inc Ltd | Professional & scientific | 2000 |
| Weyham Associates Limited | Information & communication | 2007 |
| Whale Household Articles Limited | Wholesale & retail | 2023 |
| Whale Tankers Limited | Manufacturing | 2001 |
| Whale Technology Limited | Manufacturing | 1994 |
| Whale Vehicles Limited | Manufacturing | 1969 |
| Wheeleys Road Limited | Real estate | 2001 |
| Whelec Limited | Construction | 1998 |
| White Wear Ltd | Wholesale & retail | 2026 |
| Whitelodge Alveley Limited | Health & social care | 2000 |
| Whitesmore Neighbourhood Nursery Limited | Other services | 2005 |
| Whitewater Technologies Limited | Professional & scientific | 1998 |
| WHJ Consultancy Limited | Professional & scientific | 2019 |
| WHS Plastics Brierley Hill Ltd | Manufacturing | 2019 |
| Wicklen Limited | Construction | 1993 |
| Widecoast Limited | Manufacturing | 1992 |
| Wilda's Ltd | Hospitality | 1994 |
| Wilden Developments Limited | Construction | 2004 |
| Wilkes Tranter & Co Limited | Professional & scientific | 2005 |
| Wilko Engineering Co. (Birmingham) Limited | Manufacturing | 1985 |
| Willenhall Fasteners Limited | Wholesale & retail | 1982 |
| Willenhall Hardware & D.I.Y. Limited | Wholesale & retail | 2007 |
| Wilton Flooring Limited | Construction | 2005 |
| Wilvofinance Ltd | Information & communication | 2024 |
| Wine Collector by Nickolls & Perks Ltd | Wholesale & retail | 1953 |
| Winwood Investments Limited | Real estate | 1994 |
| Wizaner Limited | Information & communication | 1990 |
| WMT (1986) Limited | Professional & scientific | 1986 |
| WOK Express 2000 Limited | Hospitality | 2023 |
| Wolverhampton Industrial Engines Limited | Manufacturing | 1976 |
| Wolverhampton Law Society | Other services | 1889 |
| Wolverhampton Lithographic Limited | Manufacturing | 1997 |
| Wolverhampton Motor Finance Company Limited | Financial services | 1952 |
| Wombourne Pool Bar Limited | Arts & recreation | 2003 |
| Woodbourne Bolbeck Limited | Professional & scientific | 2006 |
| Woodbridge International Ltd | Wholesale & retail | 2018 |
| Woodbrooke Properties Limited | Real estate | 2007 |
| Woodhall Products Limited | Manufacturing | 1999 |
| Woodsetton Charitable Trust | Arts & recreation | 2007 |
| Woolacombe Enterprises Limited | Hospitality | 2008 |
| Wordsley Motor Company Limited | Wholesale & retail | 2005 |
| Workingday Ltd | Administrative & support | 2017 |
| Workmate Technology Limited | Manufacturing | 1998 |
| Worksop Galvanizing Limited | Manufacturing | 1964 |
| Workweek Ltd | Information & communication | 2019 |
| Wprs Limited | Water & waste | 2007 |
| Wrazzle Ltd | Wholesale & retail | 2024 |
| Wrekin Development | | 1994 |
| Wrights Plastics Limited | Manufacturing | 1987 |
| Writers Guild of Europe Limited | Administrative & support | 2004 |
| Wroxeter Hotel Limited | Hospitality | 2006 |
| Wulfrun Hotels Limited | Hospitality | 2002 |
| Wyndley Grove Management Company Limited | Households | 2001 |
| Wyrleytech Ltd | Professional & scientific | 2007 |
| Xclusive Treasure Services Limited | Extraterritorial | 2017 |
| Xenia Apparel Co., Ltd | Manufacturing | 2023 |
| Xiyun Tech Limited | Wholesale & retail | 2023 |
| Xpressobooks Ltd | Information & communication | 2018 |
| Y.B. Securities Limited | Real estate | 1972 |
| Yakoo Technology Limited | Wholesale & retail | 2023 |
| Yansport (Holdings) Limited | Administrative & support | 1975 |
| Yansport Safetywear Limited | Manufacturing | 2001 |
| Yardsdale Ltd | Real estate | 2002 |
| Yavee Hednesford Ltd | Hospitality | 2026 |
| Yewdale Crescent Management Limited | Real estate | 1997 |
| Ying Chao Trading Co., Ltd | Wholesale & retail | 2023 |
| Yiwu Dingba Trade Co., Ltd | Wholesale & retail | 2023 |
| Yiwu Jinyin Import and Export Co., Ltd | Wholesale & retail | 2023 |
| Yiwu Miye Import & Export Co., Limited | Wholesale & retail | 2023 |
| Yiwu Shengren Import and Export Co., Ltd | Wholesale & retail | 2023 |
| Yiwu Shuoguang Import and Export Co., Limited | Wholesale & retail | 2023 |
| Yiwu Vanstar Import&Export Co., Ltd | Wholesale & retail | 2023 |
| Yiwu Yiman Import and Export Co., Ltd | Wholesale & retail | 2023 |
| Ynhome Co., Ltd | Wholesale & retail | 2023 |
| YOO Recruit Ltd | Administrative & support | 2014 |
| Younis Bhatti & Co. Limited | Professional & scientific | 1999 |
| Your Courier.Com Limited | Professional & scientific | 2005 |