| West Sussex Storage Limited | Real estate | 2021 |
| Westcountry Rentals Limited | Administrative & support | 2010 |
| Western Lubricants Limited | Wholesale & retail | 2009 |
| Western Road Holdings Limited | Real estate | 2018 |
| Westgate on Sea 1 Ltd | Construction | 2015 |
| Westgate on Sea 2 Limited | Real estate | 2019 |
| Weston Sales and Lettings Limited | Real estate | 2009 |
| Wetton LLP | | 2008 |
| Whataidea Limited | Information & communication | 2023 |
| Wheatleys Accident Repair Centre Limited | Wholesale & retail | 2018 |
| White BEE Digital Limited | Professional & scientific | 2020 |
| White Cotton Cards Limited | Manufacturing | 2014 |
| Whitejade Investments Limited | Real estate | 2018 |
| Whiteman Optometry Ltd | Wholesale & retail | 2023 |
| Whiterock I Properties Ltd | Real estate | 2025 |
| Whiteways Consultancy Ltd | Professional & scientific | 2024 |
| Whiteways Management Association Limited | Households | 2017 |
| Wickerson Film & TV Limited | Information & communication | 2023 |
| Wight Enterprise Limited | Arts & recreation | 2009 |
| Wild Ocean OMEGA3 Fish Snacks Limited | Wholesale & retail | 2017 |
| Wild Ocean OMEGA3 Fish Specialists Limited | Wholesale & retail | 2017 |
| William George Homes (Purley) Limited | Construction | 2005 |
| William Roberts Coaching and Advisory Ltd | Information & communication | 2024 |
| Williams & Smithells International Ltd | Administrative & support | 2018 |
| Williams & Smithells Marine Group Ltd | Financial services | 2019 |
| Willix Advisory Ltd | Real estate | 2025 |
| Willix Investments Ltd | Financial services | 2023 |
| Willo Estates Ltd | Construction | 2026 |
| Willows of Reigate Ltd. | Wholesale & retail | 2002 |
| Wilson Ball Ltd | Professional & scientific | 2010 |
| Wilson House Management Limited | Households | 1980 |
| Wimbledon Accountants Limited | Information & communication | 2019 |
| Wine Night in Ltd | Hospitality | 2026 |
| Wing Hing Wickford Ltd | Hospitality | 2025 |
| Winged Consultancy Limited | Professional & scientific | 2025 |
| Winifred Trading Limited | Wholesale & retail | 2023 |
| Winstones Country Store Ltd | Wholesale & retail | 2026 |
| Winterbeck Associates Limited | Professional & scientific | 2015 |
| Wise Tech Ventures Limited | Information & communication | 2017 |
| Wiseheads Limited | Information & communication | 1999 |
| With a W Limited | Information & communication | 2017 |
| With AW Holdings Limited | Financial services | 2020 |
| Wivelsfield Properties Limited | Real estate | 2024 |
| Wizard Commerce Ltd | Information & communication | 2017 |
| WJF Trading Partners Ltd | Professional & scientific | 2025 |
| WMC GP Ltd | Health & social care | 2018 |
| Wohasu Ltd | Real estate | 2023 |
| WOK YOU Like (SW) Ltd | Hospitality | 2012 |
| Wolf Property Management (South) Limited | Real estate | 2015 |
| Wolvers Holdings Limited | Real estate | 1993 |
| Wonic Source Ltd | Administrative & support | 2024 |
| Wood on the Floor Limited | Construction | 2018 |
| Woodhatch Butchers Limited | Wholesale & retail | 2019 |
| Woodhook Ltd. | Construction | 2016 |
| Woodland Pursuits Limited | Arts & recreation | 1990 |
| Woodlands Place (Redhill) Management Company Limited | Households | 2023 |
| Woodleigh Projects Limited | Construction | 2009 |
| Woodpecker Ltd | Manufacturing | 1986 |
| Woods Sanders & Co Limited | Other services | 1999 |
| Woodsen Ltd. | Real estate | 2019 |
| World Arena Ltd | Professional & scientific | 2024 |
| World Briefing Limited | Information & communication | 2011 |
| World Transport Services Ltd | Administrative & support | 2017 |
| Worldoriginsite.Org Limited | Other services | 2023 |
| Worth Road Crawley Limited | Real estate | 2024 |
| Worthing Property Limited | Real estate | 2026 |
| Wray Precision Engineering Ltd | Manufacturing | 2025 |
| Wraylands Ltd | Real estate | 2024 |
| WS Heritage Ltd | Professional & scientific | 2022 |
| X L Holdings Limited | Real estate | 1998 |
| Xertia Limited | Information & communication | 2010 |
| XIX Associates Limited | Administrative & support | 2007 |
| XIX Protection Group Limited | Administrative & support | 2007 |
| XIX Recruitment Limited | Extraterritorial | 2007 |
| Xls-Exclusive Limousine Service Limited | Transport & logistics | 2010 |
| Xtreme Signs (West Sussex) Limited | Manufacturing | 2016 |
| Xxyd Ltd | Hospitality | 2023 |
| Yarmouth Capital Limited | Real estate | 2019 |
| YES Holidays Ltd | Administrative & support | 2025 |
| YES Life Ltd | Administrative & support | 2022 |
| YES WE DO Websites Ltd | Information & communication | 2010 |
| Yida Express Limited | Transport & logistics | 2024 |
| Ymfm Limited | Real estate | 2024 |
| Yorze Limited | Information & communication | 2017 |
| Youngs Kitchen Ltd | Hospitality | 2019 |
| Your Finance Team Ltd | Professional & scientific | 2015 |
| Your HR Team Ltd | Professional & scientific | 2019 |
| Your Marketing Team Limited | Professional & scientific | 2013 |
| Your Products Limited | Wholesale & retail | 2014 |
| Yoyo Kitchens Limited | Hospitality | 2005 |
| Ypolitics Ltd | Information & communication | 2025 |
| Yuen MEI ZHU Ltd | Real estate | 2025 |
| Yumarny Ltd | Hospitality | 2023 |
| YY Ventures Ltd | Financial services | 2022 |
| Z&Z Restaurant Ltd | Hospitality | 2021 |
| Zarb Official Ltd | Wholesale & retail | 2024 |
| ZAS Airline of Egypt | | 1983 |
| ZEN WOK Ltd | Hospitality | 2024 |
| Zenbuy E-Commerce Ltd | Wholesale & retail | 2026 |
| Zenith LAX Limited | Wholesale & retail | 2015 |