| Wellbeloved Investments Limited | Construction | 2019 |
| Wesmid Office Systems Limited | Wholesale & retail | 1964 |
| Wessex Aviation Limited | Manufacturing | 2014 |
| Westenhanger Castle Limited | Administrative & support | 2018 |
| Westerham Antiques & Collectables Ltd | Other services | 2025 |
| Westerham Brewery Company Limited | Manufacturing | 2003 |
| Westerham Cars Ltd | Transport & logistics | 2014 |
| Westerham Drainage Limited | Water & waste | 2015 |
| Westerham EYE Care Ltd | Health & social care | 2012 |
| Westerham High Street Barbers Limited | Other services | 2023 |
| Westerham Plumbers Limited | Construction | 2024 |
| Westerham Projects Limited | Administrative & support | 2010 |
| Westerham Solicitors Limited | Professional & scientific | 2011 |
| Westmoreland Consulting Ltd | Professional & scientific | 2010 |
| Weston Living Limited | Households | 2025 |
| Westway Electrical Ltd | Construction | 2024 |
| Wetringo Ltd | Transport & logistics | 2023 |
| WFS OPS Ltd | Wholesale & retail | 2025 |
| White Art (UK) Limited | Manufacturing | 2011 |
| White Dove Investment LLP | | 2021 |
| White House Framing Limited | Wholesale & retail | 2016 |
| White Lightning Electrical Ltd | Construction | 2023 |
| Whitehead Consulting Limited | Information & communication | 2012 |
| Whiti Projects Ltd | Construction | 2017 |
| WHO Lets the Dog OUT Limited | Agriculture & fishing | 2012 |
| Wickham Diggers Limited | Construction | 2014 |
| Wide Shoes Ltd | Wholesale & retail | 2011 |
| Wignac UK Limited | Wholesale & retail | 2019 |
| Willinghurst Limited | Arts & recreation | 1991 |
| Willow Fire and Security Ltd | Administrative & support | 2023 |
| Willow Place Smallfield Management Company Limited | Households | 2024 |
| Willow Way Investments Limited | Real estate | 2024 |
| Wimbledon Automatics Limited | Wholesale & retail | 2001 |
| WIN Properties Ltd | Real estate | 2019 |
| Windlass Limited | Professional & scientific | 2009 |
| Winn & Partners Ltd | Professional & scientific | 2020 |
| Wiseman C Ltd. | Wholesale & retail | 2009 |
| Without a Doubt Limited | Professional & scientific | 2025 |
| WJK Advisory Ltd | Professional & scientific | 2022 |
| Wolfelands Limited | Real estate | 2002 |
| Wonder Weaver Design Limited | Wholesale & retail | 2022 |
| WOO Without the Waffle Ltd | Health & social care | 2026 |
| Woodcock's Glass Ltd | Construction | 2009 |
| Wooden IT BE Nice? Ltd | Construction | 2021 |
| Woodleigh Residential Park Limited | Hospitality | 2021 |
| Wright Solutions South East Ltd | Other services | 2020 |
| Wrightway Window Films & Graphics Ltd | Other services | 2025 |
| XP Consultancy Limited | Professional & scientific | 2005 |
| XRP Electrical Services Ltd | Construction | 2022 |
| Xtend HR Limited | Professional & scientific | 2021 |
| Yellow Shop E13 Ltd | Wholesale & retail | 2022 |
| YES Window Company Limited | Construction | 2007 |
| YOU Home Improvements Ltd | Construction | 2022 |
| YUM Yums Bexley Ltd | Hospitality | 2016 |
| Yusmarg Limited | Information & communication | 2026 |
| Zanzoun Limited | Financial services | 2022 |
| ZERO9 Engineering Ltd | Administrative & support | 2023 |
| Znap Building Services Ltd | Construction | 2019 |