| Walcot Ownership Limited | Real estate | 2025 |
| Wall Street Trading Desks (UK) Limited | Extraterritorial | 1989 |
| Wallcot Block a Management Company Limited | Real estate | 2006 |
| Walnut Tree Joinery Ltd | Manufacturing | 2018 |
| Waltz Amitz Limited | Real estate | 2025 |
| Wannop & FOX Limited | Professional & scientific | 2001 |
| Wannops LLP | | 2011 |
| Wardsflex Limited | Manufacturing | 2009 |
| Ware Builders Limited | Construction | 2010 |
| Ware Properties Limited | Real estate | 2016 |
| Warmai Limited | Information & communication | 2025 |
| Warren Chester Consulting Limited | Professional & scientific | 2017 |
| Warrendell Management Limited | Households | 2025 |
| Warwick Court Limited | Professional & scientific | 2003 |
| Waste for Space Ltd | Water & waste | 2026 |
| Waste Knot Wood Limited | Manufacturing | 2018 |
| Watches of Sussex Limited | Wholesale & retail | 2018 |
| Water Sustainability Limited | Financial services | 2024 |
| Watergate Park Estate Limited | Real estate | 1989 |
| Waterloo Square Management Limited | Real estate | 1996 |
| Waters Edge Clinic Ltd | Administrative & support | 2010 |
| Waterscan Limited | Professional & scientific | 1994 |
| Watersgill Ltd | Wholesale & retail | 2003 |
| Watersports Coaching Limited | Education | 2023 |
| Watling & Hirst Ltd | Professional & scientific | 2004 |
| Watson Advertising Ltd | Professional & scientific | 2025 |
| Watson Brown Automation Limited | Professional & scientific | 2016 |
| Watts Draughting Ltd | Construction | 2019 |
| Waveplex Limited | Financial services | 2024 |
| Waves Cafe & Sandwich Bar Ltd | Hospitality | 2011 |
| WAX IS Dead Limited | Wholesale & retail | 2019 |
| Wayfinder Wealth Management Ltd | Financial services | 2024 |
| WD Carpentry Sussex Ltd | Construction | 2025 |
| WE ARE Grownup Ltd | Professional & scientific | 2014 |
| WE ARE Omni Marketing Limited | Professional & scientific | 2024 |
| WE Collect WE Store Limited | Administrative & support | 2014 |
| WE Mean Clean Ltd | Administrative & support | 2018 |
| WE Perform IT Limited | Extraterritorial | 2018 |
| We'Ve GOT Plans Ltd | Wholesale & retail | 2020 |
| Weald and Downland Open Air Museum Limited | Arts & recreation | 1969 |
| Weald Consulting (Southern) Limited | Administrative & support | 2011 |
| Weather Shop Limited | Professional & scientific | 2003 |
| Weaver Leisure Limited | Hospitality | 1995 |
| Weaver Operating Company Ltd | Professional & scientific | 2007 |
| Web Precision Engineering Limited | Manufacturing | 2010 |
| Webb's Land Limited | Professional & scientific | 1988 |
| Webber - Walton Limited | Construction | 2003 |
| Website Success Ltd | Professional & scientific | 2011 |
| Webstar Marketing Services Limited | Information & communication | 2017 |
| Webster Research and Consulting Limited | Information & communication | 2014 |
| Wedding Singer School Ltd | Education | 2025 |
| Weeoo Ltd | Financial services | 2025 |
| Weight Partners Capital LLP | | 2010 |
| Weight Partners Corporate Limited | Administrative & support | 2010 |
| Weight Partners Limited | Extraterritorial | 2004 |
| Welcome House Day Nursery Ltd | Health & social care | 2011 |
| Wellies Tea Rooms Ltd | Hospitality | 2018 |
| Wellness Crop Brokers Ltd | Financial services | 2026 |
| Wells Farm Property Owners Limited | Households | 1977 |
| Wells Technology Limited | Information & communication | 2008 |
| Wellsfield Road Association Limited | Households | 1990 |
| Wermut ST Leonards Limited | Hospitality | 2021 |
| Wessex Interiors Limited | Construction | 1991 |
| Wessex M&E Services Limited | Construction | 1996 |
| West Abbey Limited | Professional & scientific | 2010 |
| West Broyle House Residents Association Limited | Households | 1988 |
| West Dean Limited | Wholesale & retail | 1978 |
| West Dean Preschool | Education | 2010 |
| West Dean Wood Stoves Limited | Construction | 2020 |
| West Sussex Biodiversity Project Limited | Agriculture & fishing | 2003 |
| West Sussex Care Limited | Health & social care | 2015 |
| West Sussex Drains Ltd | Water & waste | 2017 |
| West Sussex Estates Limited | Construction | 1981 |
| West Sussex Home Solutions Ltd | Construction | 2023 |
| West Sussex House Clearance Limited | Professional & scientific | 2005 |
| West Sussex Office Furniture Limited | Manufacturing | 2004 |
| West Sussex Plastics Limited | Wholesale & retail | 2018 |
| West Sussex Plumbing and Heating Ltd. | Construction | 2015 |
| West Sussex Scaffolding Ltd | Construction | 2022 |
| West Sussex Services Ltd | Administrative & support | 2023 |
| West Sussex Urology LLP | | 2010 |
| West Wicklow Developments Limited | Construction | 2019 |
| West Wicklow Holdings Limited | Real estate | 2018 |
| West Wicklow Property Four Limited | Real estate | 2018 |
| West Wicklow Property Limited | Real estate | 2016 |
| West Wicklow Property One Limited | Real estate | 2016 |
| West Wicklow Property Three Ltd | Real estate | 2016 |
| West Wicklow Property Two Ltd | Real estate | 2016 |
| West Wicklow Residential One Ltd | Real estate | 2016 |
| West Wicklow Residential Three Ltd | Real estate | 2016 |
| West Wittering Estate P L C | Wholesale & retail | 1952 |
| Westbourne House School Educational Trust Limited | Education | 1967 |
| Westcott Construction Limited | Construction | 2013 |
| Westergate Developments Limited | Construction | 1965 |
| Westergate Management Limited | Administrative & support | 2009 |
| Westgate Advisers Ltd | Professional & scientific | 2015 |
| Westgate Properties (Chichester) Limited | Construction | 1992 |
| Westgate Property Services Limited | Construction | 1994 |
| Westlands Farm Developments Limited | Construction | 2014 |
| Weston Heating Services Ltd | Construction | 2014 |