| West Lothian Laundry Service Limited | Administrative & support | 2025 |
| Westcars (Broomhill) Limited | Extraterritorial | 1984 |
| Westcars (Holdings) Limited | Extraterritorial | 1969 |
| Westcars Limited | Extraterritorial | 1999 |
| Westcars Tayside Limited | Extraterritorial | 1988 |
| Western Automobile Company Limited | Wholesale & retail | 1994 |
| Western Europa Limited | Extraterritorial | 2002 |
| Wihs Ltd | Transport & logistics | 2025 |
| Wild Strike Ltd | Arts & recreation | 2025 |
| William Legacy Property Ltd | Real estate | 2024 |
| Wilsons of Edinburgh Limited | Transport & logistics | 2025 |
| Wilta Health Solutions Ltd | Administrative & support | 2015 |
| Wincarnis Limited | Wholesale & retail | 1998 |
| Winchburgh (Town Centre) Limited | Construction | 2015 |
| Winchburgh Asset Sales Ltd | Wholesale & retail | 2025 |
| Winchburgh Developments (Holdings) Limited | Financial services | 2018 |
| Winchburgh Developments Limited | Construction | 2011 |
| Winchburgh Investments Ltd | Real estate | 2023 |
| Winchburgh Motorway Junction Limited | Financial services | 2018 |
| Winchburgh Retail Limited | Construction | 2015 |
| Winchburgh Traders Limited | Financial services | 2022 |
| Window Blinds Limited | Wholesale & retail | 2025 |
| WM Maxwell (Scotch Whisky) Limited | Manufacturing | 1990 |
| Wolves Motors Ltd | Wholesale & retail | 2024 |
| Woocollectibles Ltd | Wholesale & retail | 2025 |
| Wyndford Farm Plants Limited | Wholesale & retail | 2013 |
| Y&E Sports Management Ltd | Arts & recreation | 2020 |
| Yemjeh Ltd | Wholesale & retail | 2026 |
| ZA Vending Solutions Ltd | Other services | 2023 |
| Zac&Co Ltd | Wholesale & retail | 2019 |
| Zarran Investments Ltd | Real estate | 2024 |
| ZEB Motors Limited | Wholesale & retail | 2025 |
| Zenon Traders Ltd | Wholesale & retail | 2020 |