| Wansdyke Networks Ltd | Information & communication | 2020 |
| Warleigh Manor Management Limited | Hospitality | 1999 |
| Warleigh Ventures Ltd | Professional & scientific | 2024 |
| Warminster Hotel Company Ltd | Hospitality | 2021 |
| Warminster Osteopathic Clinic | Health & social care | 2006 |
| Warwick Business Consulting Ltd | Administrative & support | 2024 |
| Waste Recycling @ Bath Limited | Water & waste | 2003 |
| Watch & Learn Productions Ltd | Information & communication | 2024 |
| Watches of Bath (Trade) Limited | Wholesale & retail | 2025 |
| Watches of Bath Limited | Wholesale & retail | 2024 |
| Waterkloof Limited | Information & communication | 2022 |
| Watership Farm Community CIC | Administrative & support | 2018 |
| Waterson Construction Limited | Construction | 2023 |
| Waterson Group Holdings Ltd | Financial services | 2025 |
| Watson Bertram & Fell Limited | Professional & scientific | 2006 |
| Watson's Court Health Clinic Ltd | Health & social care | 2011 |
| Watts Moving Ltd | Transport & logistics | 2021 |
| Wave Marketing Ltd | Professional & scientific | 2018 |
| Wavedrives Ltd | Professional & scientific | 2015 |
| Wavelength Market Research Consultancy Ltd | Professional & scientific | 2018 |
| Wavesix Ltd | Health & social care | 2023 |
| Wavestone Trading Limited | Wholesale & retail | 2025 |
| Wavetech AV Limited | Manufacturing | 2015 |
| Wax&Wonder Limited | Wholesale & retail | 2025 |
| Waylon Projects Ltd | Construction | 2018 |
| Waylon Property Services Limited | Real estate | 2020 |
| Waypoint Parking Ltd | Transport & logistics | 2026 |
| Ways With Words Ltd | Extraterritorial | 2023 |
| Wayside Veryan Limited | Professional & scientific | 2016 |
| WBC Properties Ltd | Construction | 2023 |
| WBC Quantity Surveying Ltd | Professional & scientific | 2024 |
| WBC Structures Ltd | Professional & scientific | 2022 |
| WBC Valuations Ltd | Professional & scientific | 2024 |
| WC Mechanical Ltd | Construction | 2015 |
| WE ARE Coco Ltd | Professional & scientific | 2001 |
| WE ARE Reach Ltd | Information & communication | 2016 |
| WE ARE Spark Ltd | Information & communication | 2025 |
| WE ARE Twist Ltd | Arts & recreation | 2014 |
| Wealthspace Ltd | Information & communication | 2024 |
| Wealthtime Limited | Financial services | 2006 |
| Wealthtime Trustees Limited | Extraterritorial | 2007 |
| Wear Sustainably Ltd | Wholesale & retail | 2021 |
| Weave Creative Limited | Information & communication | 2015 |
| Web Commerce Limited | Professional & scientific | 2019 |
| Webfoleo Limited | Information & communication | 2011 |
| Websitesy IT Limited | Information & communication | 2021 |
| Websomatic Limited | Information & communication | 2019 |
| Weirthai Ltd | Hospitality | 2017 |
| Weisberg Legal (Office Holding) Limited | Real estate | 2025 |
| Weisberg Legal (Trust Corporation) Limited | Administrative & support | 2024 |
| Weisberg Legal Limited | Professional & scientific | 2020 |
| Welbank Water Consulting Ltd | Professional & scientific | 2020 |
| Weldco Ltd | Financial services | 2023 |
| Welden & Co Limited | Financial services | 2019 |
| Well Bath Ltd | Health & social care | 2019 |
| Wellbeing and Legacy Solutions Ltd | Other services | 2017 |
| Wellfar Consultancy Ltd | Health & social care | 2014 |
| Wellola Limited | Information & communication | 2019 |
| Wellow Capital Ltd | Professional & scientific | 2025 |
| Wellow Community BUS Group | Transport & logistics | 2011 |
| Wellow Group Riding for the Disabled | Arts & recreation | 2013 |
| Wellsway Building Company Ltd | Construction | 2025 |
| Wellsway Chiropractic Limited | Health & social care | 2014 |
| Wellsway Dental Care Ltd | Health & social care | 2010 |
| Wellsway Developments Limited | Real estate | 2017 |
| Welstead Energy Limited | Energy | 2025 |
| Wendy Pidgeon Consultancy Limited | Professional & scientific | 2016 |
| Wenjlnb Limited | Hospitality | 2024 |
| Wentworth House Hotel Limited | Hospitality | 2005 |
| Wesco Systems Ltd | Construction | 2011 |
| Wesi Ltd | Information & communication | 2025 |
| Wessex Environmental Trading Limited | Professional & scientific | 2022 |
| Wessex Office Ltd | Professional & scientific | 2010 |
| Wessex Precision Instruments Limited | Manufacturing | 2011 |
| Wessex Searches Limited | Administrative & support | 2026 |
| Wessex Slip Testing Services Ltd | Professional & scientific | 2020 |
| Wessex Utility Solutions Limited | Construction | 2008 |
| Wessex Water Pension Scheme Trustee Limited | Extraterritorial | 2000 |
| West Country Construction and Clearances Limited | Water & waste | 2024 |
| West Wilts Campers Ltd | Wholesale & retail | 2022 |
| Westbarn Developments Limited | Real estate | 2015 |
| Westbarn Investments Limited | Real estate | 2019 |
| Westbrook Park 2012 Limited | Real estate | 2012 |
| Westbury I B M Automotive Limited | Transport & logistics | 2006 |
| Westcoast PVT Ltd | Health & social care | 2015 |
| Westcountry Whimsy Limited | Manufacturing | 2013 |
| Westcross Freehold Limited | Households | 2006 |
| Westerloup Limited | Manufacturing | 2022 |
| Westerman Technical Solutions Limited | Information & communication | 2003 |
| Western Astrology Project Limited | Information & communication | 2024 |
| Western Bistro Ltd | Hospitality | 2018 |
| Western Building Consultants Limited | Professional & scientific | 2003 |
| Western Building Control Limited | Professional & scientific | 2003 |
| Western Skip Hire Ltd | Water & waste | 2023 |
| Westfield Chocolate Moulds Limited | Manufacturing | 2021 |
| Westfield House (Bath) Limited | Households | 1971 |
| Westgate 12 Holdings Limited | Other services | 2018 |
| Westgate Repairs & Vapes NO 2 Limited | Wholesale & retail | 2025 |
| Westgate Repairs & Vapes NO 3 Limited | Other services | 2025 |
| Westgate Repairs & Vapes NO 4 Limited | Wholesale & retail | 2025 |