| West Sussex Bespoke Joinery Ltd | Manufacturing | 2024 |
| West Sussex GUN Company Ltd | Wholesale & retail | 2019 |
| West Sussex Homes Ltd | Real estate | 2020 |
| West Sussex Lofts Ltd | Construction | 2019 |
| West Sussex Plastering Limited | Construction | 2026 |
| West Sussex Wedding Venue Limited | Real estate | 2012 |
| Westbrook Creative LLP | | 2017 |
| Westbrook LEA Equine Limited | Agriculture & fishing | 2007 |
| Western Branch Limited | Professional & scientific | 2014 |
| Westgate Case Management Limited | Health & social care | 2022 |
| Westingford Solutions Ltd | Professional & scientific | 2010 |
| Westlands (Freehold) Company Limited | Households | 2017 |
| Westlands (Sussex) Management Company Limited | Households | 1989 |
| Westlands (Sussex) RTM Company Limited | Households | 2007 |
| Westmorland Property Limited | Extraterritorial | 2016 |
| Weyberg Limited | Real estate | 2010 |
| Wheatsheaf PUB Ltd | Hospitality | 2024 |
| Wheelers Autoworks Ltd | Wholesale & retail | 2024 |
| Wheelwrite Ltd | Information & communication | 2023 |
| Whiskey Armstrong Limited | Professional & scientific | 2019 |
| Whitaker & Welfare Equestrian Arenas Ltd | Construction | 2023 |
| White Development Consultancy Ltd | Professional & scientific | 2018 |
| White Hart Court (Horsham) Management Limited | Households | 1986 |
| White Heart Productions Limited | Education | 2025 |
| White Heather Developments (Godalming) Limited | Real estate | 2008 |
| White Heron Limited | Information & communication | 2024 |
| White Horse Inn (Maplehurst) Limited | Hospitality | 2002 |
| White Lined House Wealth Management Limited | Financial services | 2023 |
| White Ridge Estates Ltd | Other services | 2019 |
| White Tiger Martial Arts LLP | | 2024 |
| Whitebeam Management Ltd | Real estate | 2008 |
| Whitebox Van Ltd. | Wholesale & retail | 2015 |
| Whitecastle Engineering Limited | Professional & scientific | 2016 |
| Whitehaven Land Limited | Real estate | 2016 |
| Whitehead Marketing Ltd | Wholesale & retail | 2006 |
| Whitestork Consulting Ltd | Professional & scientific | 2020 |
| Whittaker PMS Limited | Construction | 2018 |
| Whoof Whoofs (Agency) Limited | Other services | 2019 |
| Whoof Whoofs Limited | Other services | 2014 |
| Wickham Woods Holdings Ltd | Financial services | 2020 |
| Wickham Woods Properties Ltd | Real estate | 2020 |
| Wickhams Brown Limited | Manufacturing | 1998 |
| Wickhurst Green (Broadbridge Heath) Management Company Limited | Households | 2013 |
| Widow Films Limited | Information & communication | 2024 |
| Wild Harvested Limited | Wholesale & retail | 2005 |
| Wildgoose (UK) Limited | Manufacturing | 2012 |
| Wildgoose Investment Holdings Limited | Financial services | 2021 |
| Wildgoose Services Limited | Other services | 2024 |
| Wilding Gardens CIC | Administrative & support | 2025 |
| Wilkins Heating Ltd | Construction | 2025 |
| Wilkins Smith Wellness Ltd | Health & social care | 2026 |
| Will Matters LLP | | 2010 |
| Will-Denn Resources Limited | Administrative & support | 1970 |
| William Gardens Limited | Households | 2023 |
| William Sugg and Company Ltd | Manufacturing | 2019 |
| Willow Stone Properties Limited | Real estate | 2025 |
| Wilson & Mansfield Limited | Wholesale & retail | 2025 |
| Wilth Ltd. | Professional & scientific | 2015 |
| Wilton Chandler Ltd | Professional & scientific | 2002 |
| Wimblehurst Court Management Company Limited | Households | 1974 |
| Winch & Boag Developments Limited | Construction | 2013 |
| Windaful Limited | Arts & recreation | 2022 |
| Winderbank Limited | Information & communication | 2006 |
| Windrake Limited | Professional & scientific | 2015 |
| Wine Investment Association Limited | Other services | 2012 |
| Wingfield Digby Limited | Wholesale & retail | 2015 |
| Wings Ground Support Equipment Limited | Transport & logistics | 2020 |
| Wingspro Software Limited | Information & communication | 2025 |
| Winn Car Company Limited | Wholesale & retail | 2022 |
| Winners Convenience Store Ltd | Wholesale & retail | 2026 |
| Winterfold Investments Ltd | Financial services | 2022 |
| Winterfold Luxury Ltd | Administrative & support | 2012 |
| Wireless Wildlife Ltd | Professional & scientific | 2022 |
| Wirewool Ltd | Information & communication | 2024 |
| Wisentic Pets UK Limited | Financial services | 2025 |
| Wispwell Limited | Real estate | 1983 |
| Witchell Properties Limited | Construction | 2004 |
| Wizard Analytics Ltd | Real estate | 2022 |
| WJE Group Limited | Real estate | 2026 |
| WJS Developments Ltd | Construction | 2006 |
| WJT BUS. Limited | Health & social care | 2015 |
| WKH Enterprises Ltd | Wholesale & retail | 2024 |
| Wnash Construction Ltd | Construction | 2025 |
| Wobblywork Ltd | Information & communication | 2023 |
| Women in Rock Ltd | Arts & recreation | 2023 |
| Women in Social Housing (Wish) Community Interest Company | Other services | 2019 |
| Wondrous ME Limited | Wholesale & retail | 2025 |
| Wood Harris Limited | Wholesale & retail | 2012 |
| Woodcross Developments Limited | Wholesale & retail | 1983 |
| Wooden Legacy Limited | Manufacturing | 2009 |
| Woodfalls Manor Management NO.2 Limited | Extraterritorial | 1993 |
| Woodies of Sussex Limited | Construction | 2019 |
| Woodlands Park (Horsham) Residents Company Limited | Households | 2016 |
| Woodlark Ltd | Professional & scientific | 2021 |
| Woods for Learning Community Interest Company | Administrative & support | 2014 |
| WOODS2WEALTH Ltd | Agriculture & fishing | 2025 |
| Woodside Close (Shermanbury) Residents Association Limited | Households | 2017 |
| Woodstock 1968 Limited | Extraterritorial | 2013 |
| Woodstock IT Services Limited | Information & communication | 2011 |
| Woodview Consulting Limited | Professional & scientific | 2014 |