| Willan Commercial Limited | Professional & scientific | 1989 |
| Willan Construction Limited | Professional & scientific | 1986 |
| Willan Developments Limited | Construction | 1989 |
| Willan Group Limited | Professional & scientific | 2000 |
| Willan Investments Limited | Real estate | 1946 |
| Willard Project Management Limited | Construction | 1985 |
| William Design Ltd | Professional & scientific | 2007 |
| William Harrison Trust Limited | Real estate | 1948 |
| Williams Crane Hire Limited | Administrative & support | 1998 |
| Williams Garage Services Ltd | Wholesale & retail | 2005 |
| Wilmslow (Falcon) Security Systems Limited | Administrative & support | 1983 |
| Wilmslow Conservative Club Buildings Company Limited | Real estate | 1923 |
| Wilmslow Direct Car Sales Limited | Wholesale & retail | 2001 |
| Wilmslow Management Limited | Administrative & support | 1993 |
| Wilmslow Security Services Limited | Administrative & support | 1989 |
| Wilmslow Trade Frames Limited | Wholesale & retail | 2003 |
| Wilson Bell Property Services Limited | Real estate | 2006 |
| Wilson Stewart Property Limited | Real estate | 1999 |
| Windtechs Ltd | Manufacturing | 2007 |
| Windyridge Garage Limited | Wholesale & retail | 2004 |
| Windyway Kennels Limited | Other services | 2002 |
| Winsford Transport Company Limited | Professional & scientific | 1986 |
| Wiskow Associates Limited | Information & communication | 1989 |
| WJA Limited | Professional & scientific | 2005 |
| WJH Limited | Professional & scientific | 2005 |
| Wood Finance UK Limited | Professional & scientific | 1999 |
| Wood Pensions Trustee Limited | Extraterritorial | 1985 |
| Woodacre (NW) Ltd | Construction | 2023 |
| Woodcrofts Residential Homes Limited | Extraterritorial | 1988 |
| Woodhall Properties (Cheshire) Limited | Real estate | 2003 |
| Woodhead Hall Limited | Health & social care | 1994 |
| Woodheys Club Limited | Other services | 1985 |
| Woodhouse Bespoke Ltd | Construction | 2022 |
| Woodlands Civil Engineering Ltd | Wholesale & retail | 2006 |
| Woodlands Garages Ltd | Wholesale & retail | 2006 |
| Woodroyd Properties Limited | Real estate | 1997 |
| Woolstencroft Agencies Limited | Administrative & support | 2003 |
| Wordingham Accounting Limited | Professional & scientific | 2020 |
| Wordweaver Limited | Arts & recreation | 2006 |
| Wrexham Coaches Limited | Transport & logistics | 2005 |
| Wright Contractual Services Limited | Professional & scientific | 2002 |
| Wright Dose Ltd | Professional & scientific | 2006 |
| WSR Recycling Limited | Water & waste | 1990 |
| X-Ray Technology Limited | Manufacturing | 1998 |
| X2 Communications Limited | Information & communication | 2004 |
| XL Engineering Limited | Professional & scientific | 2006 |
| Yalcraft Equestrian Limited | Wholesale & retail | 1987 |
| Yanaya Health Services Ltd | Health & social care | 2020 |
| Yarrow House Holdings Limited | Professional & scientific | 2009 |
| Yarrow House Limited | Health & social care | 2002 |
| Yeleran Limited | Administrative & support | 2006 |
| Yewtree Builders Limited | | 1990 |
| YKK (U.K.) Limited | Manufacturing | 1966 |
| Ymca Cheshire Limited | Hospitality | 1993 |
| Yorkshire Pelvic Care Limited | Health & social care | 2023 |
| Your Place Abroad Ltd. | Professional & scientific | 2000 |
| Zahra Locums Limited | Health & social care | 2011 |
| ZAN Limited | Real estate | 1919 |
| Zane Taylor Financial Services Ltd | Administrative & support | 2011 |
| ZEN Mortgages Ltd | Financial services | 2018 |
| Zena Engineering Services Limited | Professional & scientific | 2007 |
| Zero Energy Design Ltd | Professional & scientific | 2006 |
| Zero Lift Tippers Limited | Water & waste | 2015 |
| Zinc Properties Group Ltd | Real estate | 2019 |
| Zintenta Limited | Information & communication | 2017 |