| West Street Investments Ltd | Real estate | 2012 |
| West Sussex Solar Ltd | Professional & scientific | 2011 |
| Westcountry Resourcing Ltd | Professional & scientific | 2023 |
| Westend Technologies Limited | Professional & scientific | 1998 |
| Westerham Brewery PUB Company Limited | Hospitality | 2008 |
| Western Land PLC | Real estate | 1972 |
| Westgate Developments (Sussex) Ltd | Construction | 2010 |
| Westlake Residential LLP | | 2010 |
| Westminster Apparel Limited | Manufacturing | 2017 |
| Westminster Real Estate Limited | Real estate | 2018 |
| Westview Building Company Ltd | Construction | 2024 |
| WET Waste Recycling Limited | Administrative & support | 2010 |
| Wetton Herrera Enterprises Ltd | Other services | 2010 |
| WH Consult Limited | Administrative & support | 2017 |
| Wharf Capital Limited | Professional & scientific | 2009 |
| WHATNEXT4U Limited | Professional & scientific | 2002 |
| WHD Consulting Ltd | Administrative & support | 2006 |
| Wheni'M Ltd | Education | 2025 |
| Wherever Next Group Ltd | Professional & scientific | 2024 |
| Whippersnapper Republic Limited | Administrative & support | 2016 |
| Whippet and Partners Limited Liability Partnership | | 2010 |
| White Cove Ltd | Real estate | 2020 |
| White Feather Estates Ltd | Real estate | 2020 |
| White Harte Windows & Doors Ltd | Construction | 2026 |
| White Noise Analytics Ltd | Professional & scientific | 2025 |
| White Rabbit Gallery Limited | Manufacturing | 2011 |
| Whitehall International Recruitment Limited | Administrative & support | 2003 |
| Whitehall Management Ltd | Information & communication | 1996 |
| Whitehall Recruitment Limited | Administrative & support | 1982 |
| Whitenet Ltd | Wholesale & retail | 2019 |
| Whitlock and Heaps (Portslade) Ltd | Real estate | 2003 |
| Whitnall Propco UK Ltd | Financial services | 2017 |
| Whittaker Paving Ltd | Construction | 2015 |
| Wickham Close Ltd | Extraterritorial | 2011 |
| Wickham Roads Limited | Households | 2011 |
| Wicks Housing Limited | Real estate | 2021 |
| Wickwar Estates Limited | Real estate | 2023 |
| Wild Beginnings PRE School Limited | Education | 2023 |
| Wild Drives Ltd | Information & communication | 2022 |
| Wild Embers Media Limited | Information & communication | 2019 |
| Wild Green Haggis Investments | Financial services | 2024 |
| Wild Pier Ltd | Wholesale & retail | 2023 |
| Wild Promotions Limited | Arts & recreation | 2024 |
| Wild Thing Retreats Ltd | Arts & recreation | 2025 |
| Wild Trout CIC | Education | 2025 |
| Wilderkids Ltd | Manufacturing | 2025 |
| Wildlab Holdings Ltd | Financial services | 2021 |
| Wildlife Media Ltd | Information & communication | 2013 |
| Wildmaker Productions Ltd | Professional & scientific | 2021 |
| Wilfredson's Limited | Financial services | 2025 |
| Willow Drake Developments Ltd | Construction | 2025 |
| Willow Park Engineering Ltd | Professional & scientific | 2019 |
| Willowjay Ltd | Construction | 2021 |
| Wills in Plain English Ltd | Other services | 2020 |
| Wilton Villas (Management) Limited | Administrative & support | 1987 |
| Windmill Cottage Ventures Limited | Real estate | 2023 |
| Windmill Court (Horley) Management Company Limited | Households | 2002 |
| Window Wise Group (Sussex) Limited | Extraterritorial | 2010 |
| Wine GUY Limited | Wholesale & retail | 2018 |
| Wine Line Limited | Wholesale & retail | 2024 |
| Wine Marketing CRU Limited | Agriculture & fishing | 2011 |
| Winnwoo Investments Limited | Real estate | 2026 |
| Winstanley Quality Solutions Limited | Information & communication | 2003 |
| Wise Solar (Sussex) Limited | Extraterritorial | 2010 |
| Wiseman Industries Ltd | Manufacturing | 2004 |
| Wish Hill Properties (Willingdon) Limited | Households | 1996 |
| WKD Labs Ltd | Professional & scientific | 2022 |
| WMJ Computing Limited | Information & communication | 1998 |
| Wmortgages Limited | Financial services | 2016 |
| Wobblegate Limited | Wholesale & retail | 2015 |
| Wobe Properties Ltd | Real estate | 2020 |
| Wonderworks Post Production Ltd | Information & communication | 2018 |
| Woodcote Care Holdings Ltd | Professional & scientific | 2023 |
| Woodcote Care Ltd | Health & social care | 2013 |
| Woodhouse Butchery South East Limited | Hospitality | 2022 |
| Woodhouse Hospitality Ltd | Hospitality | 2019 |
| Woodlands Park Limited | Construction | 2019 |
| Woodlands Park London Limited | Construction | 2023 |
| Woodlands View Ltd | Households | 2001 |
| Woodpecker Chase (Lindfield) Management Company Limited | Households | 2014 |
| Woodside Manor Limited | Real estate | 2001 |
| Woodside R. Court Management Group Limited | Households | 2017 |
| Woodwards Farm Limited | Agriculture & fishing | 2004 |
| Woofter Incorporated Ltd | Real estate | 2021 |
| Woolton Consultants Ltd | Professional & scientific | 2025 |
| Wooton & Bean Financial Solutions Limited | Financial services | 2014 |
| Wooton & Bean Specialist Lending Solutions Limited | Financial services | 2019 |
| Wooton Investments Limited | Financial services | 2025 |
| Words GUY Ltd | Information & communication | 2016 |
| Work and Learning Opportunities C.I.C. | Education | 2010 |
| Workgloves Direct Ltd | Wholesale & retail | 2008 |
| World Interiors Limited | Construction | 2010 |
| World Telemedia (Holdings) Limited | Professional & scientific | 2001 |
| World Telemedia Limited | Information & communication | 2001 |
| Worldwide Consultancy Services Limited | Administrative & support | 1998 |
| Worth Glamping Limited | Hospitality | 2016 |
| Wortleford Trading Company Limited | Construction | 1963 |
| Wowpad Ltd | Real estate | 2020 |
| WP Watches Ltd | Wholesale & retail | 2024 |
| Wreford Family LLP | | 2017 |