| Widnes Smiles Holdings Ltd | Health & social care | 2026 |
| Wightman Stewart Waterjet Limited | Administrative & support | 2009 |
| Wigwam Management Limited | Wholesale & retail | 2013 |
| Wiin.Global Limited | Other services | 2020 |
| Wild Property Developments Limited | Real estate | 2024 |
| Wildbloods of Norden Limited | Wholesale & retail | 2024 |
| Wildbrook Real Estate Limited | Real estate | 2016 |
| Wildside Beers Limited | Extraterritorial | 2016 |
| Wildside Brewery Limited | Extraterritorial | 2016 |
| Wildside Brewing Co Limited | Extraterritorial | 2016 |
| Wileigh Foods Ltd | Wholesale & retail | 2019 |
| Wilkinson-Jones Ltd | Hospitality | 2024 |
| Will Ferry Soccer Schools Bury Limited | Education | 2024 |
| Willa&Bo Ltd | Wholesale & retail | 2022 |
| William Broadbent Limited | Construction | 2026 |
| William Hare Group Limited | Professional & scientific | 1991 |
| William Hare Limited | Manufacturing | 1945 |
| William Hare Painting Limited | Manufacturing | 2010 |
| William Hare Rotherham Limited | Manufacturing | 2014 |
| Willis Bros. (Bury) Limited | Wholesale & retail | 2003 |
| Willow Brook Care Group Services Ltd | Health & social care | 2026 |
| Willow Properties Warrington Limited | Real estate | 2015 |
| Willow Street News and OFF Licence Ltd | Wholesale & retail | 2025 |
| Wills & Wills Medical Ltd | Health & social care | 2023 |
| Wilson and Hamer Construction Limited | Construction | 2021 |
| Wilson and Hamer Property Ltd | Real estate | 2025 |
| Wilson-Hunt Property Group Ltd | Real estate | 2026 |
| Wilsons Developments Ltd | Construction | 2011 |
| Windacre Holdings Limited | Real estate | 2017 |
| Windacre Pre-School Limited | Health & social care | 2013 |
| Windacre Property Services Limited | Construction | 2017 |
| Windmill Green Consulting Limited | Professional & scientific | 2017 |
| Wing LEE Chinese Takeaway Ltd | Hospitality | 2023 |
| Wings and Tingz MCR Ltd | Hospitality | 2025 |
| Winkleco Limited | Real estate | 2022 |
| Winning Mindsets Limited | Professional & scientific | 2009 |
| Winnington Financial Planning Ltd | Financial services | 2017 |
| Wintak Limited | Construction | 2020 |
| Winterburn Limited | Extraterritorial | 1973 |
| Winzenburg Property Solutions Limited | Real estate | 2024 |
| Wipe Your Debts Limited | Financial services | 2019 |
| Wise Living Limited | Construction | 2021 |
| Wise Travel and Tours Ltd | Information & communication | 2024 |
| Wiseworld Retail Limited | Wholesale & retail | 2023 |
| Wish Listed Items Ltd | Wholesale & retail | 2026 |
| Wistful Vista Limited | Wholesale & retail | 2015 |
| Withey Grove Limited | Administrative & support | 2017 |
| Wittle Technology Limited | Information & communication | 2022 |
| Wjoe Holdings Ltd | Financial services | 2026 |
| WK Professional Services Nationwide Limited | Professional & scientific | 2019 |
| WO Property Ltd | Real estate | 2018 |
| Wolverine Research UK Ltd | Wholesale & retail | 2025 |
| Wonderpus Ltd | Other services | 2015 |
| Woodacre Investments Limited | Extraterritorial | 2020 |
| Woodfields Carwash Bury Ltd | Administrative & support | 2022 |
| Woodhill Construction Limited | Construction | 2018 |
| Woodhill Enterprises Ltd | Wholesale & retail | 2022 |
| Woodhill Property Group Ltd | Real estate | 2025 |
| Woodward Ventures Ltd | Hospitality | 2020 |
| Woodway Systems Limited | Information & communication | 1986 |
| Working Wear Limited | Wholesale & retail | 2008 |
| Workplace Environment Solutions Limited | Professional & scientific | 2003 |
| Workvia Ltd | Administrative & support | 2025 |
| World Wide Services Limited | Wholesale & retail | 2019 |
| World's Fair Media Limited | Information & communication | 2021 |
| World's Fair Publications Ltd | Administrative & support | 2010 |
| Worldwide Menus Ltd | Manufacturing | 2017 |
| Worldwide Transport Group Limited | Information & communication | 2016 |
| Worner Solutions Limited | Construction | 2021 |
| Worth Fire Protection Limited | Other services | 2014 |
| Worth Recycling Limited | Water & waste | 2025 |
| WP Outside Catering Limited | Hospitality | 2020 |
| Wrapped in Leather Limited | Wholesale & retail | 2006 |
| Wray Group Holdings Limited | Financial services | 2021 |
| Wray Mechanical and Acoustics Limited | Manufacturing | 1982 |
| Wrdf Consulting Ltd | Professional & scientific | 2019 |
| Wright Customs Ltd | Administrative & support | 2023 |
| Wright LEE Ltd | Professional & scientific | 2025 |
| WS Fire Security & Electrical Ltd | Construction | 2025 |
| WTG Foods Ltd | Hospitality | 2021 |
| WW Sport Events Limited | Education | 2014 |
| Wyatt & Partners Ltd | Information & communication | 2012 |
| Wyndal Ltd | Information & communication | 2019 |
| Wyvern Fire Safety Solutions Limited | Administrative & support | 2016 |
| X Global Ventures Ltd | Professional & scientific | 2019 |
| XB Corp IP Holdings Ltd | Manufacturing | 2025 |
| Xclusive Furniture Ltd | Manufacturing | 2026 |
| Xclusive Interiors Ltd | Manufacturing | 2023 |
| Xclusive Memorabilia & Events Limited | Arts & recreation | 2006 |
| Xemex Limited | Extraterritorial | 2021 |
| Xena Investments Limited | Manufacturing | 2021 |
| Xerical Ltd | Wholesale & retail | 2022 |
| Xerkon Industries Limited | Manufacturing | 1971 |
| Xgen Motors Limited | Wholesale & retail | 2025 |
| XI Property Ltd | Real estate | 2026 |
| Xirtam (UK) EBT Trustee Limited | Extraterritorial | 2010 |
| Xisora Networks Ltd | Information & communication | 2025 |
| XJW Technical Services Ltd | Professional & scientific | 2024 |
| XLR8 Sports Limited | Wholesale & retail | 1995 |
| Xnet Technology Ltd | Information & communication | 2025 |