| Webbs Roofing Services Limited | Construction | 2020 |
| Webinabox Limited | Information & communication | 2007 |
| Wecanmakeyourphonering.Com Limited | Information & communication | 2018 |
| Wedding Cars High Wycombe Ltd | Transport & logistics | 2023 |
| Wedding Cars Reading Ltd | Transport & logistics | 2023 |
| Weee Help Recycle Limited | Professional & scientific | 2010 |
| Weighcount (1990) Limited | Professional & scientific | 1989 |
| Welborn Grab Hire Limited | Construction | 2019 |
| Welborn Utilities & Resurfacing Ltd | Construction | 2023 |
| Wellside Business Limited | Professional & scientific | 2013 |
| WEM Commercial Ltd | Construction | 2020 |
| Wembury Coaching Limited | Professional & scientific | 2022 |
| Wentworth Renewables Limited | Construction | 2018 |
| Wessex College Limited | Health & social care | 2001 |
| Wessex Medical Reporting Limited | Health & social care | 2015 |
| West Midland Merchants Limited | Wholesale & retail | 1960 |
| West Midlands Care Association Limited | Other services | 2003 |
| West Midlands Housing Group Limited | Real estate | 1996 |
| West Midlands Medical Services Limited | Education | 2010 |
| West Midlands Music Limited | Administrative & support | 1995 |
| West Midlands Supermarket Limited | Wholesale & retail | 2009 |
| West Midlands Upholstery Limited | Manufacturing | 2004 |
| Westbourne Mortgages Limited | Professional & scientific | 2021 |
| Westgate Transport Training Limited | Education | 2008 |
| Westhope Care Limited | Health & social care | 2006 |
| Westhope Investments Limited | Health & social care | 2010 |
| Westhope Limited | Health & social care | 2004 |
| Westmart Properties Limited | Real estate | 2003 |
| Westmid Holdings Limited | Financial services | 2021 |
| Westmid Vehicles LLP | | 2008 |
| Westmidvent Limited | Manufacturing | 1978 |
| Westridge Kidderminster Ltd | Construction | 2024 |
| Westridge Midlands Limited | Extraterritorial | 2007 |
| Westridge Mids Limited | Real estate | 2022 |
| Whalemove Limited | Transport & logistics | 2019 |
| Wheatsheaf WB Limited | Hospitality | 2022 |
| Whipper Snappers Childcare Limited | Health & social care | 2012 |
| Whita Products Limited | Professional & scientific | 1997 |
| White Elephant Consulting Ltd | Extraterritorial | 2017 |
| White Lillies Care Ltd | Health & social care | 2019 |
| White Studios Ltd | Information & communication | 2023 |
| Whitehead Associates Limited | Administrative & support | 2010 |
| Whites GPM Ltd | Administrative & support | 2013 |
| Whitestone Spatial Research Limited | Professional & scientific | 2009 |
| Whittington Securities Limited | Financial services | 1965 |
| Wilden Industrial Estates Limited | Real estate | 1959 |
| Wildhart Records Limited | Wholesale & retail | 2019 |
| Wilkinson Dynamic Balancing Limited | Manufacturing | 1993 |
| Will Hire Limited | Wholesale & retail | 2004 |
| Willander Holdings Limited | Financial services | 2020 |
| Willander Homes Limited | Real estate | 2017 |
| William Hackett Chain Products Limited | Manufacturing | 2015 |
| Williams Cleaning Limited | Administrative & support | 2017 |
| Willitts Family Commercial Limited | Financial services | 2021 |
| Willitts Family Investments Limited | Real estate | 2020 |
| Willowdene Farm Limited | Professional & scientific | 2004 |
| Willowdene Rehabilitation Limited | Agriculture & fishing | 2002 |
| Willowdene Resources Limited | Construction | 2006 |
| Willwriting Academy Limited | Education | 2009 |
| Windmill Hill Convenience and PO Ltd | Wholesale & retail | 2025 |
| Windmill Investments (Midlands) Limited | Households | 2020 |
| Windmill Laundry & DRY Cleaners Ltd | Other services | 2024 |
| Window Films & Graphics Limited | Construction | 2013 |
| Windsor Academy Trust | Education | 2011 |
| Wing Chun Kung FU Ltd | Arts & recreation | 2013 |
| Wire Glide Zolutions Limited | Other services | 2025 |
| With NOT for Ltd | Professional & scientific | 2021 |
| Witton Bank Residents Association Limited | Hospitality | 1992 |
| Witty Whale Limited | Wholesale & retail | 2018 |
| WMB Home Improvements Limited | Construction | 2008 |
| Wmca Operations Ltd | Other services | 2018 |
| WMH Fluid Power Ltd | Wholesale & retail | 2012 |
| WNP Community Limited | Real estate | 2004 |
| Wolverhampton & Black Country Creative Enterprises Hub Community Interest Company | Wholesale & retail | 2014 |
| Wolverhampton Scaffolding Ltd | Construction | 2020 |
| Wombourne Drive Buy Limited | Wholesale & retail | 2024 |
| Wood Farm (Phase 2) Ltd | Arts & recreation | 2015 |
| Woodlands Hospitality Limited | Hospitality | 2021 |
| Woodleigh Properties | Real estate | 2018 |
| Woodpecker Technology Ltd | Administrative & support | 2009 |
| Worcester Health Limited | Wholesale & retail | 2025 |
| Wordcandy Limited | Information & communication | 2013 |
| Workforce Development Solutions Ltd | Education | 2024 |
| Workplace Store Limited | Wholesale & retail | 2018 |
| Workshop Supplies Direct Ltd | Wholesale & retail | 2011 |
| World Jewellery Limited | Wholesale & retail | 1986 |
| World of Supply Limited | Extraterritorial | 2017 |
| Worthy Woman Coaching Limited | Manufacturing | 2011 |
| Wound Care Alliance UK | Health & social care | 2008 |
| WPC Properties Ltd | Real estate | 2021 |
| Wrekin Civil Engineering Limited | Construction | 2020 |
| WV Taxi Ltd | Transport & logistics | 2025 |
| Wychbury Care Services Limited | Hospitality | 2001 |
| WYE View Properties Ltd | Extraterritorial | 2024 |
| Wyken Finance Limited | Financial services | 2016 |
| X S Inventory Limited | Manufacturing | 2024 |
| XC Nails & Spa Halesowen Ltd | Other services | 2024 |
| Xclusive Dental Laboratory Ltd | Manufacturing | 2014 |
| Xianhua Depo Limited | Wholesale & retail | 2025 |
| Xianren Ltd | Construction | 2024 |