| Water Lane Barbers Limited | Other services | 2023 |
| Water Lane Dental Practice Limited | Health & social care | 2017 |
| Waterhouse Wealth Management Limited | Administrative & support | 2012 |
| Waterman Brown Associates Limited | Hospitality | 2005 |
| Waterman One Limited | Real estate | 2025 |
| Waters Edge (Haslingden Road) Management Company Limited | Households | 2022 |
| Waters Edge (Wimborne) Management Company Limited | Households | 2012 |
| Waters Reach (Wadhurst) Management Limited | Households | 2017 |
| Waterside Boulevard Management Company Limited | Households | 2010 |
| Waterside Gardens (Doncaster) Management Co Ltd. | Households | 1999 |
| Waterways Drainage Specialists Ltd | Water & waste | 2018 |
| Wates Farms Limited | Agriculture & fishing | 1982 |
| Watling Management Limited | Households | 2011 |
| Watsons of Salisbury (Holdings) Limited | Professional & scientific | 1985 |
| Watsons of Salisbury Limited | Professional & scientific | 1976 |
| Watt & Where Ltd | Real estate | 2021 |
| Watt Chisel Limited | Construction | 2016 |
| Watts Scaffolding Ltd | Construction | 2015 |
| Wave Crafters Carpentry Ltd | Extraterritorial | 2023 |
| Wavecrest Solutions Ltd | Information & communication | 2023 |
| Waves Training Solutions Limited | Professional & scientific | 2012 |
| Wavy Limited | Other services | 2024 |
| Wayne Green Construction Limited | Construction | 2003 |
| Wayvara Ltd | Wholesale & retail | 2025 |
| WBL Services Limited | Education | 2007 |
| WCA Trading Services Ltd | Transport & logistics | 2014 |
| Wdpj Media Limited | Professional & scientific | 2019 |
| WE ARE FM Limited | Administrative & support | 2022 |
| WE ARE Interiors Limited | Construction | 2022 |
| WE ARE M&E Limited | Extraterritorial | 2025 |
| WE ARE Removals Ltd | Transport & logistics | 2026 |
| WE ARE the Brand Limited | Construction | 2024 |
| WE Will Wash YOU Ltd | Administrative & support | 2018 |
| Weathermore Cottage Holdings Limited | Financial services | 2025 |
| Weavers Field (Castle Cary) Management Company Limited | Households | 2018 |
| Web Creator Suite Ltd | Information & communication | 2014 |
| Webbed Feet UK Ltd | Information & communication | 2008 |
| Webster's Biosafety Ltd | Professional & scientific | 2009 |
| Weissman Ltd | Information & communication | 2017 |
| Welburg Properties Ltd | Real estate | 2024 |
| Weld-It (South) Limited | Manufacturing | 2019 |
| Well Natural Limited | Wholesale & retail | 2008 |
| Wellhurst Limited | Real estate | 1996 |
| Wellings & Co. Surveyors LLP | | 2021 |
| Wellington Mews Property Management Company Limited | Households | 2005 |
| Wellington School of Dance (Salisbury) Limited | Education | 2016 |
| Wellness Care Solutions Ltd | Health & social care | 2025 |
| Wells Printing Limited | Manufacturing | 2007 |
| Wellywalk | Health & social care | 2010 |
| Wendover Rise Management Company Limited | Households | 2009 |
| Wendy Stevens Salisbury Limited | Other services | 2017 |
| Wendy's Inspiring Stories Ltd | Arts & recreation | 2023 |
| Wentworth Trustee Company Limited | Professional & scientific | 1999 |
| WES Southern Ltd | Manufacturing | 2009 |
| Wessex Accountancy Services Ltd | Administrative & support | 1996 |
| Wessex Advisory Ltd | Professional & scientific | 2012 |
| Wessex Archaeology Limited | Professional & scientific | 1983 |
| Wessex Archaeology Ventures Limited | Professional & scientific | 2018 |
| Wessex Associates Limited | Professional & scientific | 2020 |
| Wessex Building Products South Limited | Manufacturing | 2025 |
| Wessex Community Action | Health & social care | 1993 |
| Wessex Construction Projects Ltd | Construction | 2022 |
| Wessex Decor Limited | Construction | 2007 |
| Wessex Drainage Solutions Limited | Construction | 2009 |
| Wessex Entrepreneurs Limited | Professional & scientific | 2015 |
| Wessex Fire & Rescue Service (UK) Ltd. | Public administration | 2010 |
| Wessex Fleet Solutions Limited | Administrative & support | 2004 |
| Wessex GAS Limited | Administrative & support | 2023 |
| Wessex Geoscience Ltd | Mining & quarrying | 2022 |
| Wessex Gynaecology and Wellbeing Ltd | Information & communication | 2019 |
| Wessex Holdings (SW) Ltd | Financial services | 2020 |
| Wessex Hosting Limited | Information & communication | 2010 |
| Wessex Maritime Consulting Ltd | Transport & logistics | 2020 |
| Wessex Medical Ltd | Wholesale & retail | 2010 |
| Wessex Microcement Ltd | Construction | 2021 |
| Wessex Packaging (Salisbury) Limited | Manufacturing | 2001 |
| Wessex Packaging Limited | Manufacturing | 1977 |
| Wessex Profiles Limited | Manufacturing | 2002 |
| Wessex Quarters Ltd | Real estate | 2018 |
| Wessex Rivers Services Limited | Professional & scientific | 2020 |
| Wessex Rivers Trust | Education | 2009 |
| Wessex Timber Windows Limited | Manufacturing | 2005 |
| Wessex Urology Limited | Health & social care | 2016 |
| Wessex Van Services Ltd | Wholesale & retail | 2020 |
| Wessex Vehicle Recoveries and Deliveries Limited | Transport & logistics | 2025 |
| Wessex Vehicle Services Limited | Manufacturing | 1999 |
| West 12 Management Company Limited | Households | 2005 |
| West Advisory Services Ltd | Information & communication | 2026 |
| West Barn Lodge Ltd | Hospitality | 2023 |
| West Country Aspects Limited | Professional & scientific | 2015 |
| West Gate House (Machynys East) Management Company Limited | Households | 2014 |
| West Melbury Farm Ltd | Energy | 2016 |
| West Star Property Ltd | Real estate | 2015 |
| West Two Project Management Ltd | Professional & scientific | 2026 |
| West Village Reading Management Limited | Households | 2009 |
| West Woods Design Ltd | Manufacturing | 2014 |
| Westbury Leigh (Westbury Leigh) Management Company Limited | Households | 2014 |
| Westbury Pizza Ltd | Hospitality | 2021 |
| Westgate (Llanfoist) Management Company Limited | Households | 2015 |
| Westgate (ST Andrews) Management Company Limited | Households | 2001 |