| Waterfront Accident Repair Centre Limited | Wholesale & retail | 2009 |
| Waterhouse Recruitment and Staffing Solutions Ltd | Administrative & support | 2025 |
| Watersafe Plumbing Limited | Construction | 2026 |
| Waterside Fishery Limited | Arts & recreation | 2017 |
| Watts UP Electrical Contractors Ltd | Construction | 2025 |
| Waveworks Ltd | Wholesale & retail | 2025 |
| WAX Dog Limited | Real estate | 2015 |
| Wayne Windows Limited | Construction | 1990 |
| WE Care U Community Interest Company | Health & social care | 2024 |
| WE Simplify Limited | Administrative & support | 2024 |
| Weald Place (Worthing) Residents Management Company Limited | Households | 2017 |
| Weald's Edge Ltd | Manufacturing | 2025 |
| Webb Bespoke Interiors Limited | Construction | 2019 |
| Webcycle Partnership | | 2007 |
| WEL Solar Park 22 Limited | Energy | 2014 |
| Welford Developments Ltd | Construction | 2024 |
| Well Books Ltd | Administrative & support | 2016 |
| Wellfit for Life Limited | Arts & recreation | 2018 |
| Wellness Over Waves Ltd | Health & social care | 2021 |
| Wellplumbed Limited | Extraterritorial | 2009 |
| Wessex Wrapping Ltd | Professional & scientific | 2024 |
| West Bracklesham Drive Management Limited | Households | 1980 |
| West Sussex Brickwork Ltd | Construction | 2021 |
| West Sussex Builders Limited | Construction | 1988 |
| West Sussex Building Contractors Ltd | Construction | 2024 |
| West Sussex Coastal Scaffolding Limited | Construction | 2025 |
| West Sussex Fencing Ltd | Administrative & support | 2015 |
| West Sussex Limited | Construction | 2024 |
| West Sussex Plating Limited | Manufacturing | 1987 |
| West Sussex Software Limited | Information & communication | 2014 |
| Westbourne Plumbing and Heating Limited | Construction | 2014 |
| Westbrooke House Management Co Limited | Households | 2015 |
| Westside Supplies Limited | Wholesale & retail | 1991 |
| Westy Composites Ltd | Manufacturing | 2025 |
| Wheel Revive Ltd | Manufacturing | 2023 |
| When Worlds Collide Limited | Information & communication | 2006 |
| Whistler (Kitchens and Bathrooms) Limited | Construction | 2022 |
| Whitehorne Construction Ltd | Construction | 2015 |
| Whiteman Roofing Limited | Construction | 2013 |
| Whiteways Cleaning Services Ltd | Administrative & support | 2021 |
| Whittaker's Bistro Ltd | Hospitality | 2023 |
| Whysitstill Ltd | Professional & scientific | 2009 |
| Wickenden Property Sussex Ltd | Real estate | 2024 |
| Wide Range Services and Consultancy Ltd | Administrative & support | 2014 |
| Wight FOX Limited | Real estate | 2016 |
| Wilbar Assoc Ltd | Construction | 2025 |
| Wild Groundworks Ltd | Construction | 2026 |
| Wiley Distribution Services Ltd | Transport & logistics | 1986 |
| Wiley Europe Investment Holdings Limited | Professional & scientific | 2001 |
| Wiley Europe Limited | Professional & scientific | 1988 |
| Wiley Heyden Limited | Information & communication | 1982 |
| Willbeck Consulting Limited | Information & communication | 2017 |
| William Kebab Ltd | Hospitality | 2019 |
| Willow Brook Residents Company Limited | Households | 1999 |
| Willow Court (Fareham) RTM Company Limited | Hospitality | 2004 |
| Willow Tree Services Limited | Households | 2019 |
| Willowhale Construction Limited | Construction | 2008 |
| Willowhale Ltd | Real estate | 2022 |
| Willows Management (Oakley) Limited | Households | 2012 |
| Willsa Services Ltd | Administrative & support | 2018 |
| Willsells Ltd | Wholesale & retail | 2024 |
| Wilmington Security Ltd | Administrative & support | 2023 |
| Wiltshire Leisure Limited | Hospitality | 2025 |
| Windermere Court Kenley RTM Company Limited | Households | 2011 |
| Windlesham Investments Limited | Real estate | 2023 |
| Windmill Court RTM Company Limited | Households | 2024 |
| Windruff Holdings Limited | Real estate | 1965 |
| Windsor Court (Eastbourne) Limited | Real estate | 1986 |
| Wine Castle Ltd | Wholesale & retail | 2018 |
| Wingfield Development Ltd | Construction | 2025 |
| Wintarsons Limited | Information & communication | 2019 |
| Wintle-Camp Coaching Limited | Education | 2020 |
| Wise Monkeys Ltd | Hospitality | 2019 |
| Without a HAT Limited | Other services | 2013 |
| WJB Electrical Services Ltd | Construction | 2014 |
| Wood Services Ltd | Professional & scientific | 2023 |
| Woodbridge Court (Freehold Management) Limited | Households | 2004 |
| Woodfield Publishing Limited | Information & communication | 2004 |
| Woodgrain Services Ltd. | Manufacturing | 2005 |
| Woodland View Estate Management Limited | Households | 2020 |
| Woodlandscove Day Centre CIC | Education | 2026 |
| Woods Travel Limited | Transport & logistics | 1990 |
| Woodwork Wonders Limited | Construction | 2025 |
| Wordstuff Limited | Other services | 2009 |
| Workforce Window Ltd | Professional & scientific | 2004 |
| Workmates Premier Holdings Limited | Professional & scientific | 2007 |
| Workmates Premier Limited | Administrative & support | 2000 |
| WR Plant Limited | Administrative & support | 2010 |
| Wrapped in Purple Production Ltd | Information & communication | 2020 |
| Wren Home Surveyors Ltd | Real estate | 2026 |
| WSB Scaffolding Ltd | Construction | 2025 |
| Wuchii Limited | Wholesale & retail | 2022 |
| WW Motoshine Ltd | Manufacturing | 2019 |
| Www.Web-Accountancy.Co.Uk Ltd | Professional & scientific | 2002 |
| Xela DEE One Limited | Construction | 2012 |
| Yanni Restaurant Ltd | Hospitality | 2025 |
| Yasar Limited | Hospitality | 2017 |
| Year-End Resolutions Ltd | Professional & scientific | 2005 |
| Yoni and YOU Ltd | Education | 2023 |
| Younger & SON Ltd | Construction | 2016 |