| Wallstreet Estates Ltd | Real estate | 2016 |
| Wasteswitch Limited | Professional & scientific | 2015 |
| WAT Services Limited | Manufacturing | 2015 |
| Watch Hill Consultancy Services Limited | Professional & scientific | 2024 |
| Waterbrick Ltd | Real estate | 2026 |
| Wayfaring Kiwi Ltd | Administrative & support | 2023 |
| WBL Civil Engineering Limited | Construction | 2006 |
| WDF Solutions Ltd | Administrative & support | 2012 |
| WE Care for Children Edinburgh Ltd. | Education | 2016 |
| WE Care for Children Limited | Education | 2006 |
| WE Sell Lime Ltd | Manufacturing | 2019 |
| Web & App Guru Limited | Information & communication | 2024 |
| Webquays Limited | Information & communication | 2018 |
| WEE Cabs Ltd | Transport & logistics | 2025 |
| WEE Critters Pest Control Services Limited | Administrative & support | 2012 |
| WEE Forest School Ltd | Health & social care | 2026 |
| WEE Gems Armadale Ltd | Education | 2014 |
| WEE Gems Corstorphine Limited | Education | 2014 |
| WEE Gems Holdings Limited | Education | 2013 |
| WEE Gems Limited | Education | 2005 |
| WEE Gems Livingston Limited | Health & social care | 2010 |
| Wellness Traveller Ltd | Administrative & support | 2019 |
| Wellwood Communications Limited | Information & communication | 2009 |
| Weruci Ltd | Other services | 2023 |
| West Lothian Angling Ltd | Wholesale & retail | 2017 |
| West Lothian Bike Library CIC | Other services | 2017 |
| West Lothian Chamber of Commerce Limited | Other services | 1997 |
| West Lothian Community Foundation Limited | Arts & recreation | 2011 |
| West Lothian Drug & Alcohol Service | Health & social care | 2000 |
| West Lothian Executive Cabs Ltd | Transport & logistics | 2025 |
| West Lothian Feature Walls Ltd | Construction | 2024 |
| West Lothian Football Academy Ltd | Arts & recreation | 2019 |
| West Lothian Grab Hire Ltd | Water & waste | 2025 |
| West Lothian Memorials Ltd | Other services | 2021 |
| West Lothian NOW Ltd | Other services | 2018 |
| West Lothian Party Rentals Ltd | Administrative & support | 2023 |
| West Lothian Taxis Ltd | Transport & logistics | 2016 |
| West Lothian Youth Action Project | Health & social care | 2007 |
| Westcroft Court 1966 Limited | Extraterritorial | 2014 |
| Westholme Property Ltd | Financial services | 2024 |
| Westwood GAS & Heating Services Ltd | Construction | 2020 |
| WGS Holdings Limited | Extraterritorial | 1985 |
| Whadyawant Ltd | Professional & scientific | 2020 |
| Wheat Free Bakery Ltd | Manufacturing | 2024 |
| Whittaker's Family Fishmongers Limited | Wholesale & retail | 2020 |
| Wholesale Bathrooms & Kitchens Ltd | Administrative & support | 2017 |
| Whyman Limited | Financial services | 2014 |
| Wilkins Tech Ltd | Professional & scientific | 2026 |
| William Ness Delivery Ltd | Transport & logistics | 2026 |
| William Wallace Tourism Scotland Ltd | Administrative & support | 2020 |
| WILSON2 Properties Limited | Real estate | 2019 |
| Window & Door Company Limited | Wholesale & retail | 2022 |
| Windows and Doors Wholesale Ltd | Wholesale & retail | 2018 |
| Winpac Scaffolding Ltd | Construction | 2016 |
| Wish Propco Limited | Financial services | 2022 |
| Wishco Ltd | Real estate | 2010 |
| Wizard Alliance Limited | Wholesale & retail | 2023 |
| WKT Properties Ltd | Real estate | 2019 |
| WL Manandvan Ltd | Water & waste | 2026 |
| WM Joiner’S Ltd | Construction | 2024 |
| WMC Motors Scotland Ltd | Wholesale & retail | 2025 |
| Woca Workshop Ltd | Manufacturing | 2024 |
| Wojciech Grabarczyk Ltd | Real estate | 2024 |
| Wolfey Ltd | Construction | 2020 |
| Wonderland of Pet's Supplier Ltd | Wholesale & retail | 2023 |
| Woodbridge Timber Limited | Wholesale & retail | 1983 |
| Woohoo Furniture Ltd | Manufacturing | 2021 |
| Woohoo Sleep Like a Bear Limited | Manufacturing | 2023 |
| Workflo Records Management Ltd | Administrative & support | 2019 |
| Workflo Solutions (Scotland) Limited | Manufacturing | 2007 |
| World of Coffee Limited | Education | 2001 |
| WORX24 Ltd | Administrative & support | 2017 |
| WORX24 Retail Ltd | Information & communication | 1996 |
| Woslers Ltd | Information & communication | 2021 |
| Wotherspoons Plumbing & Heating Ltd | Construction | 2024 |
| WTG Treatment Limited | Manufacturing | 2013 |
| Wulver Studios Ltd | Manufacturing | 2024 |
| Wxxzz Limited | Manufacturing | 2017 |
| X.E.L. Developments Limited | Construction | 1999 |
| XG Analytics Limited | Education | 2024 |
| Xingwang Edin Ltd | Hospitality | 2025 |
| XKC Ltd | Transport & logistics | 2025 |
| Xpress Homes Limited | Real estate | 2022 |
| Xuri Livingston Limited | Hospitality | 2026 |
| Xyliase Technologies Ltd | Information & communication | 2026 |
| Y8 Holdings Ltd | Financial services | 2026 |
| Yau's Investments Limited | Real estate | 2003 |
| YES Trades Ltd | Manufacturing | 2014 |
| YG Limited | Hospitality | 2026 |
| Ykcollections Ltd | Wholesale & retail | 2025 |
| YL Trading Limited | Wholesale & retail | 2020 |
| Yodelphone Ltd | Information & communication | 2025 |
| Yoss C S Ltd. | Information & communication | 2012 |
| YOU Want IT Darker Ltd | Information & communication | 2011 |
| Your Country Cottages Limited | Real estate | 2023 |
| Your Mortgage Options Ltd | Financial services | 2013 |
| Yucca Corp Ltd | Administrative & support | 2023 |
| Yupty Limited | Information & communication | 2016 |
| Z1 Properties Limited | Real estate | 2002 |
| Z8P Ltd | Wholesale & retail | 2024 |