| Watson Associates (Audit Services) Ltd | Professional & scientific | 2003 |
| Watson Associates (Professional Services) Limited | Professional & scientific | 2013 |
| Watts N Wheels Limited | Wholesale & retail | 2025 |
| Watts Windows and Doors Sussex Limited | Construction | 2023 |
| Waunchope & Wright Limited | Construction | 2014 |
| Wayland Industries Limited | Financial services | 2025 |
| Wazi Limited | Wholesale & retail | 2010 |
| Wealden Accountancy Services Ltd | Professional & scientific | 2026 |
| Wealden Ambulance Services Ltd | Health & social care | 2013 |
| Wealden Commercial Ltd | Real estate | 2018 |
| Wealden Field Tax Advisers Limited | Professional & scientific | 2024 |
| Wealden Transport Ltd | Transport & logistics | 2025 |
| Wealdmeadow Limited | Financial services | 1997 |
| Weitzel Ortho Limited | Health & social care | 2010 |
| Welcome Stranger Management Company Limited | Households | 2019 |
| Weller Welcroft Investments Limited | Financial services | 2024 |
| Wentworth Properties Sussex Ltd | Real estate | 2021 |
| West AV Ltd | Information & communication | 2025 |
| West Creative Prints Ltd | Manufacturing | 2026 |
| Westac Power Generation Limited | Manufacturing | 2014 |
| Westac Powerpac Limited | Extraterritorial | 2005 |
| Westcott Leach Limited | Real estate | 2007 |
| Westerham Wires Limited | Construction | 2023 |
| Westlain Ltd | Agriculture & fishing | 2023 |
| Westmead Enterprises Ltd | Real estate | 2021 |
| What Matters Creative Ltd | Professional & scientific | 2018 |
| Whatever Music Ltd | Wholesale & retail | 2009 |
| Wheeler Electrical Limited | Construction | 1964 |
| Wheeler MEP Limited | Construction | 2019 |
| Whitcher Event Solutions Limited | Manufacturing | 2026 |
| White Buffalo Investments Limited | Financial services | 2021 |
| White Dog Woodworx Limited | Manufacturing | 2022 |
| White Friars (Boreham Street) Management Company Limited | Extraterritorial | 2007 |
| White Hart PUB Limited | Hospitality | 2020 |
| White Oak Carpentry Limited | Construction | 2022 |
| Whitehead Smith Limited | Other services | 2013 |
| Whitespace Creative Studios Limited | Professional & scientific | 2017 |
| Wicks C&R Limited | Real estate | 2024 |
| Widd Industries Limited | Information & communication | 2017 |
| Wigo Radcon Invest Limited | Financial services | 2021 |
| Wigrig Ltd | Professional & scientific | 2020 |
| Wild and Beyond Limited | Professional & scientific | 2022 |
| Wild at Hertz Ltd | Information & communication | 2026 |
| Wild Media Group Ltd | Other services | 2019 |
| Wild Oak Inns Limited | Hospitality | 2015 |
| Wild Pony & Rubber Duck Limited | Arts & recreation | 2014 |
| Williams IV Limited | Financial services | 2023 |
| Williamskin Limited | Health & social care | 2016 |
| Wilsome LLP | | 2018 |
| Wilsons Cleaning Ltd | Administrative & support | 2014 |
| Window Cleaner Pro Ltd | Information & communication | 2008 |
| Windows Xpress Ltd | Construction | 2008 |
| Wine Warehouse Limited | Wholesale & retail | 2018 |
| Wineguise Limited | Wholesale & retail | 2011 |
| Wintermute Company Holdings Limited | Professional & scientific | 2022 |
| Wisteria Life Limited | Health & social care | 2022 |
| With Emotions in Mind Ltd | Health & social care | 2020 |
| WJ Financial Ltd | Professional & scientific | 2023 |
| WJB Formwork Services Limited | Construction | 2008 |
| WLB Properties Limited | Real estate | 2025 |
| WM Bubbles Ltd | Wholesale & retail | 2024 |
| WM Restaurants Limited | Hospitality | 2003 |
| Wolf Cards Ltd | Wholesale & retail | 2025 |
| Wonder Wires Ltd | Wholesale & retail | 2020 |
| Wonder Woofs Limited | Wholesale & retail | 2023 |
| Woodchime Limited | Professional & scientific | 1988 |
| Woodland Enterprise Boiler Company Limited | Wholesale & retail | 2017 |
| Woodlands Anaesthesia LLP | | 2019 |
| Woods Concrete Pumps Southern Limited | Construction | 2013 |
| Woods Mill Small Dole Ltd | Real estate | 2025 |
| Woolpack Herstmonceux Limited | Financial services | 2023 |
| Worldcopy Limited | Real estate | 1998 |
| Worrell Homes Limited | Professional & scientific | 2003 |
| Worthing Women's Health Limited | Health & social care | 2025 |
| Worthington Hearing Limited | Wholesale & retail | 2015 |
| Wound Care Consultants Ltd | Other services | 2014 |
| WPB Consultancy Services Ltd | Professional & scientific | 2026 |
| Wrattens Removals Ltd | Transport & logistics | 2021 |
| Wright Rural Holdings Ltd | Financial services | 2025 |
| Wunderhaus Ltd | Construction | 2018 |
| WVT Recycling LLP | | 2020 |
| Wyatt Hughes Limited | Real estate | 2005 |
| Wyatt Hughes Residential Sales Ltd | Real estate | 2014 |
| Wychling Agricultural Limited | Agriculture & fishing | 2003 |
| Wynn Finance and Business Consultancy Limited | Professional & scientific | 2011 |
| XEL Trans Ltd | Transport & logistics | 2024 |
| XOC Limited | Professional & scientific | 2014 |
| Xpresso Services Limited | Manufacturing | 2011 |
| Yates Medical Services Limited | Health & social care | 2018 |
| YET Another Investment Club Ltd | Financial services | 2025 |
| York Pain Care Limited | Health & social care | 2025 |
| York Pain Group LLP | | 2025 |
| Youbiquity Ltd | Professional & scientific | 2019 |
| Youngstar Global Holdings Limited | Financial services | 2025 |
| Yourlocalcinema Ltd | Information & communication | 2017 |
| YP Property Ltd | Construction | 2018 |
| YPH (Yarnton Plumbing & Heating) Limited | Construction | 2004 |
| YSL Capital Limited | Administrative & support | 2009 |
| Zackally Ltd | Real estate | 2015 |
| Zamtri Limited | Real estate | 2024 |