| Williams Building Compliance Ltd | Professional & scientific | 2022 |
| Williams Casco Limited | Professional & scientific | 1999 |
| Williams Drive & Patio Services Ltd | Construction | 2022 |
| Williams Graphics Ltd | Professional & scientific | 2017 |
| Williams Group Finance Ltd | Financial services | 2025 |
| Williams Investment Property Solutions Ltd | Real estate | 2020 |
| Williamswood Limited | Construction | 2003 |
| Willington Joinery Limited | Manufacturing | 2005 |
| Willis Joint Stock Limited | Real estate | 2016 |
| Willow & Stone Realty Limited | Real estate | 2025 |
| Willow Developments (Midlands) Group Limited | Financial services | 2015 |
| Willow Heating (U.K.) Limited | Construction | 2016 |
| Willow UK Builders Ltd | Construction | 2024 |
| Willowdale Grange Management Limited | Households | 1983 |
| Willows Care Solutions Ltd | Health & social care | 2023 |
| Wilmac Site Services Ltd | Construction | 2014 |
| Wilsuel Stays Limited | Households | 2025 |
| WIN Bricks Ltd | Professional & scientific | 2023 |
| WIN Works Ltd | Information & communication | 2024 |
| Windmill Plant Limited | Administrative & support | 1992 |
| Windmill Printing (1981) Limited | Manufacturing | 1970 |
| Window Kings Cleaning Services Ltd | Administrative & support | 2018 |
| Windows Direct UK Ltd | Construction | 2023 |
| Wing IT on Limited | Hospitality | 2024 |
| Wing on Property Ltd | Households | 2023 |
| Wingfield Group Limited | Financial services | 2023 |
| Wingfield Homes Limited | Real estate | 2023 |
| Wings and Paws Shop Ltd | Wholesale & retail | 2020 |
| Wings of Gold Healthcare Ltd | Health & social care | 2020 |
| Wings of Hope Parrot Rescue Ltd | Other services | 2025 |
| Winks Hair and Beauty (Wolverhampton) Limited | Other services | 2017 |
| Winn Rose Ltd | Information & communication | 2025 |
| Winnerprenuer Ltd | Administrative & support | 2024 |
| Winning Hearts Care Ltd | Health & social care | 2022 |
| Winsper Design Ltd | Arts & recreation | 2006 |
| Winstanley Lettings Ltd | Real estate | 2015 |
| Winston Drive (Swindon) Limited | Households | 2025 |
| Winston's Metal & Waste Ltd | Wholesale & retail | 2024 |
| Wintech Building Services Limited | Professional & scientific | 2003 |
| Wintech Civil and Structural Engineering Limited | Professional & scientific | 1991 |
| Wintech Engineering Limited | Construction | 2021 |
| Wintech FE Limited | Construction | 2020 |
| Wintech Group Limited | Professional & scientific | 1993 |
| Wintech Limited | Construction | 1989 |
| Wintech Resources Limited | Professional & scientific | 2022 |
| Wintech Structures Limited | Professional & scientific | 2024 |
| Winwick Plumbing & Heating Ltd | Construction | 2019 |
| Winwood Holdings Limited | Financial services | 2024 |
| Wisdom 4 Homes Limited | Real estate | 2025 |
| Wise Unitted Ltd | Construction | 2012 |
| Wiseva Ltd | Administrative & support | 2018 |
| Wisewulf Security & Electrical Ltd | Construction | 2020 |
| Wish Supply UK Ltd | Wholesale & retail | 2019 |
| Wisteria Consultancy Ltd | Education | 2022 |
| With Technology Limited | Information & communication | 2025 |
| Wittic Print Specialists Limited | Manufacturing | 2016 |
| Witton Management Company Limited | Households | 1993 |
| Wizard Inns Limited | Extraterritorial | 1997 |
| Wize Foundation CIC | Information & communication | 2025 |
| Wizpack Ltd | Administrative & support | 2024 |
| WJ Apex Limited | Wholesale & retail | 2013 |
| Wjdglobal Limited | Information & communication | 2023 |
| WJW Accountancy Services Limited | Professional & scientific | 2014 |
| WKB Limited | Wholesale & retail | 2010 |
| Wkdm Limited | Transport & logistics | 2016 |
| WLB Management Company Limited | Households | 2021 |
| WLL Skips Ltd | Water & waste | 2021 |
| WM Outlet Ltd | Wholesale & retail | 2026 |
| WM Plant Hire Limited | Administrative & support | 2005 |
| WM Solutions (UK) Ltd | Information & communication | 2013 |
| WMP Contracting Limited | Construction | 2018 |
| Wmpf Property Holdings Limited | Other services | 2021 |
| WND Electrical Services Ltd | Construction | 2025 |
| WNP Enterprise Ltd | Transport & logistics | 2024 |
| Wodehouse Investments Limited | Administrative & support | 2021 |
| Wodehouse Limited | Construction | 2010 |
| Woden DRS Limited | Wholesale & retail | 2013 |
| Wojcik Investments Ltd | Construction | 2021 |
| Wolab Services Limited | Health & social care | 2019 |
| Wolelec Ltd | Manufacturing | 2025 |
| Wolf Automation Ltd | Manufacturing | 2006 |
| Wolf Bonsai Ltd | Wholesale & retail | 2026 |
| Wolf Corporate Services Ltd | Professional & scientific | 2023 |
| Wolf Pack Energy Ltd | Administrative & support | 2025 |
| Wolf Proper T Ltd | Households | 2023 |
| Wolf Residential Limited | Real estate | 2024 |
| Wolfe European Limited | Wholesale & retail | 2010 |
| Wolfies Pizza Ltd | Hospitality | 2025 |
| Wolfridge Solutions Limited | Administrative & support | 2025 |
| Wolseley Developments Ltd | Construction | 2025 |
| Wolteph Ltd | Transport & logistics | 2019 |
| Wolton Food Co Limited | Hospitality | 2022 |
| Wolverhampton & District M S Therapy Centre Limited | Health & social care | 1988 |
| Wolverhampton (News) Ltd | Wholesale & retail | 2019 |
| Wolverhampton 1018 Ltd | Hospitality | 2016 |
| Wolverhampton Academy Limited | Arts & recreation | 2018 |
| Wolverhampton African Caribbean Resource Centre Limited | Other services | 2009 |
| Wolverhampton Amateur Boxing Club | Arts & recreation | 2008 |
| Wolverhampton and Staffordshire Living Magazine Ltd | Information & communication | 2023 |
| Wolverhampton Arts Centre Ltd. | Arts & recreation | 1997 |