| WE Warm Homes Ltd | Construction | 2025 |
| Wealth Architecture Group Limited | Real estate | 2026 |
| Weaver Vale Garden Centre Limited | Extraterritorial | 1981 |
| Web Industry Ltd | Information & communication | 2006 |
| WEBB2LET Limited | Real estate | 2019 |
| WEE Rascalz Limited | Arts & recreation | 2023 |
| Well Cleaners Limited | Administrative & support | 2025 |
| Well Suited CIC | Health & social care | 2022 |
| Wellbark Property Limited | Real estate | 2006 |
| Wellingtonia LLP | | 2017 |
| Wells Farming Limited | Agriculture & fishing | 2018 |
| Wellzo Limited | Health & social care | 2024 |
| Welton Construction and Contracting Limited | Construction | 2015 |
| Wendy Brown EAR Care Limited | Health & social care | 2023 |
| Wendy House Nursery (Carlisle) Limited | Other services | 2006 |
| Wesley Court Residents Management Company Ltd. | Households | 2006 |
| West Coast Blinds Limited | Wholesale & retail | 2015 |
| West END Trades Group Ltd | Construction | 2018 |
| West Moorland 100 Limited | Financial services | 2019 |
| West Park Draughting Services Limited | Construction | 2015 |
| West Rose Investments Limited | Financial services | 2023 |
| West Silloth Motors Limited | Wholesale & retail | 2009 |
| West Walls Brewing Co Ltd | Manufacturing | 2023 |
| Westgate Medical Ltd | Health & social care | 2014 |
| Westknowe | Administrative & support | 2012 |
| Westleigh Holdings Ltd | Financial services | 2026 |
| Westlinton Grand Inn Limited | Hospitality | 2026 |
| Westwood Landscape Design (UK) LLP | | 2024 |
| Westwood Landscape Design Ltd | Professional & scientific | 2025 |
| Westwood Landscape Limited | Administrative & support | 2017 |
| WG Property Improvements Limited | Manufacturing | 2012 |
| WH Properties Holding Ltd | Real estate | 2023 |
| What YOU GOT Today Ltd | Wholesale & retail | 2025 |
| Wheatsheaf Garage Limited | Wholesale & retail | 2008 |
| Wheelbarrow Court Management Company Limited | Households | 1994 |
| Where Poppies Grow Ltd | Information & communication | 2019 |
| Wheyrigg Hall Caravan Park Limited | Hospitality | 2025 |
| Wheyrigg Hall Hotel Limited | Hospitality | 2025 |
| Which Accountants Limited | Information & communication | 2020 |
| Whinlatter Bikes Ltd | Wholesale & retail | 2016 |
| Whinnow Farming Company | Agriculture & fishing | 2018 |
| Whins Farm Close (High Harrington) Management Company Limited | Households | 2013 |
| Whins View (High Harrington) Management Company Limited | Real estate | 2021 |
| White Bred Shorthorn Association Limited(The) | Other services | 1964 |
| White Heather Hotel (Cumbria) Ltd | Hospitality | 2021 |
| White Quey Management Company Limited | Extraterritorial | 2018 |
| White's Training Services Ltd | Education | 2017 |
| Whitechapel Project Ltd | Construction | 2021 |
| Whitehead Trustees Limited | Extraterritorial | 1994 |
| Whitelaw Technology Ltd | Manufacturing | 2005 |
| Whitesmith Consulting Solutions Limited | Professional & scientific | 2016 |
| Whiteway Couriers Ltd | Transport & logistics | 2024 |
| Whitsmith Developments Ltd | Construction | 2024 |
| Whitworth Property Ltd | Construction | 2024 |
| WHL Couriers Ltd | Transport & logistics | 2021 |
| Whole Note Distribution Ltd | Other services | 2019 |
| Wholesell Ltd | Wholesale & retail | 2025 |
| Wiggles & Giggles (Carlisle) Ltd | Health & social care | 2020 |
| Wigham Investments Limited | Administrative & support | 2025 |
| Wigmore Deliveries Ltd | Transport & logistics | 2021 |
| Wigmore Portfolio Ltd | Real estate | 2020 |
| Wild Deer Hospitality Ltd | Hospitality | 2019 |
| Wild on the Wall CIC | Arts & recreation | 2025 |
| Wild Rabbit Interiors Ltd | Wholesale & retail | 2021 |
| Wildbird Web Design Limited | Professional & scientific | 2026 |
| Wildey Building and Joinery Limited | Construction | 2015 |
| Wildriver L&P | Households | 2024 |
| Willamy Ltd | Real estate | 2021 |
| William Anderson Safety Professional Services Ltd | Information & communication | 2018 |
| William Strike Limited | Wholesale & retail | 1908 |
| William Waggott Builders Limited | Extraterritorial | 2007 |
| Williams Pasture Management Company Limited | Households | 2017 |
| Willoughby Grange Limited | Health & social care | 2019 |
| Willow Holme Lofts (Management) Limited | Households | 2001 |
| Willow Place Management Limited | Households | 2005 |
| Willow's Edge (Wrea Green) Management Company Limited | Households | 2017 |
| Willowbeck Lodge Limited | Hospitality | 2022 |
| Willowholme Auto Salvage Ltd | Water & waste | 2015 |
| Wilmart Properties Limited | Real estate | 1986 |
| Wilmslow Garden Centre Limited(The) | Extraterritorial | 1979 |
| Wilson Howe and Edgehill (Whitehaven) Management Company Limited | Households | 2015 |
| Wilson Mcgahan Services Ltd | Construction | 2014 |
| Wilson of Woodside Limited | Agriculture & fishing | 2004 |
| Winchester Place (Brampton) Management Company Limited | Real estate | 2020 |
| Window Cleaning Plus Limited | Administrative & support | 2010 |
| Window Doctor 2023 Limited | Construction | 2023 |
| Winfield Gardens Management Company Limited | Households | 2019 |
| Winged Heart Limited | Extraterritorial | 2004 |
| Winter Homes Limited | Construction | 2018 |
| Winters Group Ltd | Wholesale & retail | 2017 |
| Wita Studio Ltd | Professional & scientific | 2026 |
| WKL Trading Ltd | Administrative & support | 2017 |
| WLM County Ltd | Construction | 2019 |
| WLS Services Ltd | Administrative & support | 2017 |
| WM Armstrong Group Ltd | Transport & logistics | 2001 |
| WM Landscapes Ltd | Administrative & support | 2023 |
| WM Oliver Limited | Transport & logistics | 2013 |
| WM. Armstrong (Longtown) Limited | Transport & logistics | 1961 |
| Wolf Cycles Limited | Wholesale & retail | 2017 |
| Wolverhampton Heat Network Limited | Construction | 2024 |