| Welland Valley GAS Services Limited | Construction | 2002 |
| Wellbridge Care Services Limited | Administrative & support | 2025 |
| Wellcrew Yachts Ltd | Health & social care | 2024 |
| Wellesley Properties Limited | Real estate | 2020 |
| Wellhouse Construction Ltd | Construction | 2019 |
| Wellmeadow Therapy Ltd | Health & social care | 2024 |
| Wellorahq Ltd | Health & social care | 2025 |
| Wells and Wells Ltd | Professional & scientific | 2007 |
| Wellstead Motors Ltd | Wholesale & retail | 2024 |
| Wellsway Estates Ltd | Real estate | 2025 |
| Weloveyouroffice.Com Limited | Wholesale & retail | 2018 |
| WEN Zhou Dimsum UK Limited | Wholesale & retail | 2007 |
| Wenden Legal Ltd | Professional & scientific | 2025 |
| Wendy Daniel Events Limited | Administrative & support | 2025 |
| Wendy K Limited | Hospitality | 2023 |
| Wendy's Cafe Limited | Hospitality | 2022 |
| Wenster Ltd | Wholesale & retail | 2018 |
| Wenwood Doors Windows and Conservatories Limited | Construction | 2008 |
| Wescars Limited | Transport & logistics | 1991 |
| Wesco Grace Limited | Real estate | 2018 |
| Wesley Asset Management Ltd | Real estate | 2014 |
| Wesley Drive Management Co Limited | Households | 2024 |
| Wesmatt Ltd. | Transport & logistics | 2015 |
| Wessex Albion Ltd | Wholesale & retail | 2025 |
| Wessex Auto Centres Ltd | Wholesale & retail | 2019 |
| Wessex Car Trimming Ltd | Wholesale & retail | 2002 |
| Wessex Cardiac Trust | Administrative & support | 2006 |
| Wessex Cardiology LLP | | 2004 |
| Wessex Cars Winchester Ltd | Transport & logistics | 2023 |
| Wessex Cleaning Equipment and Janitorial Supplies Limited | Wholesale & retail | 1992 |
| Wessex Construction and Plant Hire Company Limited | Wholesale & retail | 1959 |
| Wessex Court (South East Road Southampton) Management Co. Limited | Households | 1988 |
| Wessex DOC Limited | Health & social care | 2015 |
| Wessex Environmental Services Limited | Manufacturing | 1987 |
| Wessex Freight Limited | Transport & logistics | 2000 |
| Wessex Gardeners Limited | Administrative & support | 2003 |
| Wessex Heartbeat Limited | Health & social care | 1992 |
| Wessex Metal Roofing Limited | Construction | 2014 |
| Wessex NHS Procurement Limited | Health & social care | 2019 |
| Wessex Orthopaedics Limited | Health & social care | 2024 |
| Wessex Pest Control Limited | Administrative & support | 2006 |
| Wessex Pet Care Ltd | Professional & scientific | 2024 |
| Wessex Petroleum Limited | Transport & logistics | 1971 |
| Wessex Property Group Limited | Real estate | 2024 |
| Wessex Property Managment Services Limited | Households | 2018 |
| Wessex Refrigeration Ltd | Manufacturing | 2024 |
| Wessex Regional Care Limited | Health & social care | 1998 |
| Wessex Roofing Limited | Construction | 2022 |
| Wessex Surgical Services Limited | Professional & scientific | 2002 |
| Wessex Thatchers Limited | Construction | 2013 |
| Wessex Tutors & Exam Centre Ltd | Education | 2015 |
| Wessex Tutors Ltd | Education | 2014 |
| West African Kitchen Ltd | Hospitality | 2017 |
| West Coast Global Services Ltd | Real estate | 2022 |
| West Country Fires Limited | Construction | 1988 |
| West Dene Court Management Company Limited | Households | 2002 |
| West END Dental Technologies Limited | Health & social care | 2014 |
| West END GAS Limited | Construction | 2026 |
| West END Group Limited | Extraterritorial | 2015 |
| West END Motor Company Southampton Ltd | Wholesale & retail | 2018 |
| West END Racing Limited | Arts & recreation | 2007 |
| West END Roofing and Construction Limited | Construction | 1991 |
| West END Smile Center Limited | Health & social care | 2015 |
| West Engineering Limited | Manufacturing | 2002 |
| West Farm Popham Limited | Real estate | 2025 |
| West GAS Heating Services Ltd | Construction | 2019 |
| West Hampshire School of Art C.I.C. | Education | 2019 |
| West Hills Group Limited | Professional & scientific | 2023 |
| West Itchen Community Trust Limited | Other services | 2002 |
| West Mews (Dorchester) Management Limited | Households | 2024 |
| West Midlands Development Contracting Ltd | Construction | 2017 |
| West Motors Ltd | Wholesale & retail | 2002 |
| West Quay Sizzling Slice Ltd | Hospitality | 2025 |
| West Routier Ltd | Transport & logistics | 2023 |
| West Sussex Partners in Care | Information & communication | 2000 |
| Westbourne CF Ltd | Financial services | 2013 |
| Westbourne Flowers Limited | Wholesale & retail | 2024 |
| Westbourne Road Management Company Limited | Households | 1986 |
| Westbrook Marine Projects Limited | Professional & scientific | 1986 |
| Westec Investment Group Ltd | Financial services | 2026 |
| Westec Properties Ltd | Real estate | 2026 |
| Westecsecure Ltd | Wholesale & retail | 2023 |
| Westermo Data Communications Limited | Manufacturing | 1995 |
| Western Films Ltd | Information & communication | 2022 |
| Westgate Construction (Hertford) Limited | Construction | 2000 |
| Westlands Farm Shop (Wickham) Ltd | Wholesale & retail | 2026 |
| Westlands Farm Shop (Winchester) Ltd | Wholesale & retail | 2024 |
| Westlands Soft Fruit Ltd | Agriculture & fishing | 2026 |
| Westline Tree & Grounds Services Ltd | Agriculture & fishing | 2025 |
| Westman Securities Limited | Hospitality | 2007 |
| Westoak Plumbing Ltd | Construction | 2020 |
| Westoby & Co Ltd | Real estate | 2022 |
| Westom Properties Ltd | Real estate | 2022 |
| Weston Plant Properties Limited | Professional & scientific | 1998 |
| Weston Plant Services Limited | Administrative & support | 1988 |
| Weston Woods Services Ltd | Administrative & support | 2026 |
| Westover Engineering Consultancy Services Ltd | Administrative & support | 2011 |
| Westridge Estates Limited | Financial services | 2014 |
| Westridge I.O.W. Limited | Real estate | 2006 |
| Westridge Property Holdings Limited | Financial services | 2024 |