| W.D. Estates Ltd. | Real estate | 1993 |
| WA Flooring Ltd | Wholesale & retail | 2018 |
| Warung Wati Ltd | Information & communication | 2023 |
| Way to Go Roofing & Building Limited | Construction | 2024 |
| WE Buy ANY Decking.Co.Uk Ltd | Construction | 2024 |
| Wealstone Property Ltd | Financial services | 2022 |
| Wearmouth Access Ltd | Construction | 2023 |
| Wearmouth Holdings Ltd | Financial services | 2023 |
| Wearmouth Leasing Ltd | Real estate | 2023 |
| Wearmouth Utilities Ltd | Hospitality | 2024 |
| Wearmouth's Property Developments Ltd | Real estate | 2022 |
| Webb Bros Car Body Repairs Limited | Wholesale & retail | 2003 |
| Weekend Preservation Company Limited | Administrative & support | 2003 |
| Wheeler Homes Limited | Construction | 2010 |
| Wheels in Action Ltd | Arts & recreation | 2024 |
| White Living Ltd | Hospitality | 2025 |
| Whiteaway Laidlaw & Co Limited | Financial services | 2010 |
| Whiteside Family Estates Limited | Real estate | 2025 |
| Whitesides (Prestatyn) Limited | Wholesale & retail | 2018 |
| Whitesides Stores Limited | Wholesale & retail | 2017 |
| Wilding Homes Ltd | Real estate | 1978 |
| William COX Retail Ltd | Wholesale & retail | 2023 |
| Williams Contracting Ltd | Construction | 2024 |
| Willow Contracts Ltd | Agriculture & fishing | 2025 |
| Willow Stores Limited | Wholesale & retail | 2013 |
| Willows Rest Ltd | Real estate | 2026 |
| Wilson Facilities Management Services Limited | Construction | 2022 |
| Wind Turbine Quality Inspection Limited | Professional & scientific | 2024 |
| Wise Transformation Services Ltd | Information & communication | 2024 |
| WJ Payroll Consultancy Ltd | Professional & scientific | 2019 |
| WJ Williams Farming Limited | Agriculture & fishing | 2022 |
| Woof Wellness Ltd | Manufacturing | 2026 |
| Work in Progress Rhyl CIC | Arts & recreation | 2024 |
| Worthington and Jones Limited | Wholesale & retail | 2005 |
| Wright Home Renovation Ltd | Real estate | 2023 |
| WTO Properties Ltd | Real estate | 2019 |
| WYN Edwards Electrical Ltd | Construction | 2018 |
| Y Chan Holdings Ltd | Financial services | 2023 |
| YX Fish and Chips Ltd | Hospitality | 2025 |
| Zana Hub Ltd | Hospitality | 2026 |
| Zenith Transport Ltd | Transport & logistics | 2026 |