| Westmorland Electrical Limited | Construction | 2006 |
| Whicham Services Limited | Hospitality | 2009 |
| Whitehaven Foot Clinic Limited | Health & social care | 2003 |
| Wigton Youth Station | Other services | 2001 |
| Wilkes-Green & Hill Limited | Real estate | 1996 |
| Wilkinson Joinery Limited | Manufacturing | 1996 |
| Willacy (Contractors) Limited | Wholesale & retail | 2001 |
| Williams Floorcoverings Ltd | Wholesale & retail | 2003 |
| Wilsons (Gate Farm) | Agriculture & fishing | 2007 |
| Wilsons Plant and Haulage Limited | Administrative & support | 1975 |
| Winander Group Holdings Limited | Professional & scientific | 1995 |
| Winder Grove Management Company Limited | Real estate | 1997 |
| Windmill Fisheries Limited | Hospitality | 2004 |
| Windoors (Barrow) Limited | Construction | 2002 |
| Windward Phase 1 Limited | Real estate | 1988 |
| Windward Phase 2 Limited | Real estate | 1946 |
| Wojfish Limited | Agriculture & fishing | 2018 |
| Woodstyle Joinery (Cumbria) Limited | Construction | 2007 |
| Workington Association Football Club,Limited | Arts & recreation | 1921 |
| Workington Conservative Club Company,Limited(The) | Construction | 1899 |
| Workington Town Rugby League Football Club,Limited | Arts & recreation | 1944 |
| Xanado Ltd | Administrative & support | 2007 |
| Yard 119 Management Company Limited(The) | Real estate | 1985 |
| Yewbarrow Garage Limited | Wholesale & retail | 2003 |
| Zeffirellis Limited | Hospitality | 2002 |
| Zelva Ltd | Information & communication | 2020 |