| William Bateson & SON (Decorators) Limited | Real estate | 1965 |
| William Eaves & Co. (Sheet Metal) Limited | Construction | 1980 |
| William Thomas Estate Agency Limited | Real estate | 2006 |
| Williams (Bolton) Limited | Professional & scientific | 1984 |
| Williams Dental Laboratory Limited | Health & social care | 2004 |
| Williams Design Limited | Professional & scientific | 1988 |
| Williams Financial Planning Limited | Financial services | 1987 |
| Williams Gould Holdings Limited | Professional & scientific | 2007 |
| Williams Motor Co (Manchester) Limited | Professional & scientific | 1978 |
| Williams Motor Co. Limited | Wholesale & retail | 1933 |
| Williams Motor Co.(Holdings)Limited | Wholesale & retail | 1958 |
| Williams Rochdale Limited | Professional & scientific | 1957 |
| Williams Stockport Limited | Professional & scientific | 2005 |
| Willibett Limited | Real estate | 2023 |
| Willow AI Solutions Limited | Wholesale & retail | 2025 |
| Willow Commercial Contractors Limited | Construction | 2011 |
| Willow Garden Properties TM Ltd | Real estate | 2026 |
| Willow Homes for Children Ltd | Health & social care | 2025 |
| Willow Insights Limited | Professional & scientific | 2026 |
| Willow Insulation Ltd | Construction | 2025 |
| Willow Tree Accounting Services Limited | Professional & scientific | 2017 |
| Willow Tree Day Care (Bolton) Ltd | Education | 2020 |
| Willow Tree Day Care (the Haulgh) Ltd | Education | 2025 |
| Willowfield Cleaning Ltd | Administrative & support | 2025 |
| Willowrange Limited | Professional & scientific | 1989 |
| Willows Convenience Store Limited | Wholesale & retail | 2021 |
| Wills Providence Ltd | Professional & scientific | 2021 |
| Wilmcote 1957 Limited | Extraterritorial | 2015 |
| Wilmslow Limited | Financial services | 2007 |
| Wiloak Mechanical Services Limited | Construction | 2019 |
| Wilson Cabling Services Ltd | Construction | 2024 |
| Wilson Care Group Limited | Financial services | 2024 |
| Wilson Design and Build Ltd | Construction | 2020 |
| Wilson Dodd Medical Limited | Health & social care | 2024 |
| Wilson Scott Recruitment Limited | Administrative & support | 2015 |
| Wilsons PIE Shop Limited | Wholesale & retail | 2010 |
| WIN Four Rings Limited | Administrative & support | 2020 |
| WIN Hill Digital Limited | Administrative & support | 2019 |
| WIN Impex Ltd | Wholesale & retail | 2021 |
| WIN WIN Scaffolding Services Limited | Construction | 2025 |
| Winall Assets Limited | Administrative & support | 2025 |
| Winder Properties Ltd | Real estate | 2022 |
| Windermere Investments Limited | Other services | 2016 |
| Window Plas Limited | Manufacturing | 2003 |
| Window Plas of Bolton Limited | Extraterritorial | 1993 |
| Windows With Vision Northern Ltd | Wholesale & retail | 2012 |
| Windsor Law Solicitors Ltd | Professional & scientific | 2025 |
| Wine Chiller Limited | Wholesale & retail | 2010 |
| Wine Wright Limited | Wholesale & retail | 2010 |
| Winfield's Limited | Wholesale & retail | 2004 |
| Wingate Care Homes Ltd | Health & social care | 2005 |
| Wingates Chippy Ltd | Hospitality | 2015 |
| Wingates Leisure Storage Limited | Real estate | 2014 |
| Wingates Leisure Storage Park Limited | Real estate | 2014 |
| Winget Limited | Manufacturing | 1986 |
| Wingfield Fish Bar Ltd | Hospitality | 2022 |
| Wingmirrorman Ltd | Wholesale & retail | 2024 |
| Wingville Ltd | Wholesale & retail | 2019 |
| Winlatter Limited | Hospitality | 2018 |
| Winnerz Circle Investments Ltd | Other services | 2024 |
| Winnington Electrical Services Ltd | Construction | 2021 |
| Winnington Village District Centre Management Company Ltd | Real estate | 2020 |
| Winnors Ltd | Administrative & support | 2022 |
| Winrow Performance Ltd | Health & social care | 2025 |
| Winsford Real Estate Limited | Real estate | 2021 |
| Winside Limited | Wholesale & retail | 2019 |
| Winslow Construction & Renovation Ltd | Construction | 2016 |
| Winstanley Mortgage Services Ltd | Financial services | 2002 |
| Winsulate Group Services Limited | Professional & scientific | 2014 |
| Winter HEY Investments Ltd | Real estate | 2015 |
| Winter Hill Homes Limited | Real estate | 2016 |
| Winter Hill Properties Ltd | Real estate | 2023 |
| Winterbourne Holdings Ltd | Professional & scientific | 2019 |
| Winterfell Holdings Ltd | Financial services | 2023 |
| Winton Green Investments Limited | Professional & scientific | 2021 |
| Winvest Holdings Ltd | Financial services | 2019 |
| Winwick Consultants Ltd | Professional & scientific | 2023 |
| Winwick Group Ltd | Financial services | 2025 |
| Winwick Properties Ltd | Extraterritorial | 2015 |
| Wipcar Ltd | Administrative & support | 2019 |
| Wire and Test Electrical Ltd | Construction | 2012 |
| Wired Right Electrical Solutions NW Ltd | Construction | 2026 |
| Wireohms (Universal) Limited | Manufacturing | 2023 |
| Wirk Foods Ltd | Hospitality | 2025 |
| Wirral Continuous Limited | Manufacturing | 1988 |
| Wirral Waters (RQ) Ltd | Real estate | 2024 |
| Wisal MED Ltd | Public administration | 2025 |
| Wisdom Media UK Ltd | Professional & scientific | 2021 |
| Wise Community Bolton Limited | Real estate | 2025 |
| Wise Digital Group Limited | Financial services | 2020 |
| Wise IT Limited | Information & communication | 2009 |
| Wise NW Holdings Ltd | Real estate | 2024 |
| Wiseman Solicitors Ltd | Professional & scientific | 2012 |
| Wisemann Law Limited | Professional & scientific | 2015 |
| Wiser Homes Limited | Real estate | 2020 |
| Wish Cleaning Services Limited | Administrative & support | 2024 |
| Wishford TOO Limited | Professional & scientific | 2025 |
| Wishmartgoods Ltd | Wholesale & retail | 2025 |
| Witch Taverns Limited | Hospitality | 2024 |
| Withington Grocers (NW) Limited | Wholesale & retail | 2016 |