| Webby & Sons Limited | Professional & scientific | 2017 |
| Webnet Products Limited | Wholesale & retail | 2014 |
| Webuildessex Ltd | Construction | 2021 |
| Wecan Property Group Ltd | Real estate | 2023 |
| Wednesday Professional Services Limited | Administrative & support | 2015 |
| Wehhrrl Properties Limited | Real estate | 2024 |
| Welbee Ltd | Extraterritorial | 2020 |
| Wellspring Corporate Limited | Education | 2007 |
| Wellspring Property Limited | Real estate | 2020 |
| Wendy LEE Food Stylist Limited | Hospitality | 2003 |
| Wenthor Properties Ltd | Real estate | 2023 |
| WES Systems Limited | Manufacturing | 2021 |
| West 1 Contracts (Interiors) Ltd | Construction | 2016 |
| West 1 Contracts Limited | Construction | 2010 |
| West Billericay Community Association Ltd | Arts & recreation | 1995 |
| West Essex Trade Sales Limited | Wholesale & retail | 2014 |
| West ROW Property Limited | Real estate | 2022 |
| Westbourne Consultancy Ltd | Information & communication | 2025 |
| Western View (Billericay) Residents Company Limited | Households | 2010 |
| Western View Management Company Limited | Real estate | 2007 |
| Westkeen Properties Limited | Real estate | 2010 |
| Westlands Equestrian Centre Limited | Arts & recreation | 2007 |
| Westleighs Saddlery Ltd | Wholesale & retail | 2021 |
| Westover Consultants Limited | Households | 2007 |
| Weybridge Park Estates Services Ltd | Administrative & support | 2023 |
| WG Cakes Ltd | Hospitality | 2024 |
| WGG Maintenance Ltd | Administrative & support | 2012 |
| Which Room Limited | Real estate | 2013 |
| Whistle and Bell Ltd | Administrative & support | 2022 |
| White Brothers Scaffolding Ltd | Construction | 2021 |
| White Oak Consultancy Services (UK) Limited | Information & communication | 2013 |
| Whittington Raymond Limited | Professional & scientific | 2002 |
| WHP Electrical & Building Limited | Administrative & support | 2008 |
| Wicked OR WOT (WOW) Design Ltd | Construction | 2017 |
| Wickford Motorhomes Ltd | Wholesale & retail | 2024 |
| Wickford Taxis Limited | Transport & logistics | 2010 |
| Wiggle & Woof Limited | Manufacturing | 2025 |
| Wild Earth Alchemy Limited | Wholesale & retail | 2025 |
| Wilkes Automotive Limited | Professional & scientific | 2018 |
| Wilkins and Maynard Vehicle Services Ltd | Wholesale & retail | 2021 |
| Will Keir Ltd | Construction | 2026 |
| Williams & Johnson Limited | Professional & scientific | 2018 |
| Williams Digital Ltd | Information & communication | 2010 |
| Williams Packaging Ltd. | Manufacturing | 2004 |
| Willis Avenue Ltd | Administrative & support | 2020 |
| Wilson Edwards LLP | | 2009 |
| Wilton Site Management Limited | Construction | 2010 |
| Wiltshire Chafford Investments Ltd | Real estate | 2000 |
| Wiltshire Holdings Ltd | Professional & scientific | 1998 |
| Windbush Waters Ltd | Real estate | 2023 |
| Windham Property Services Ltd | Real estate | 2024 |
| Winding Brook Developments Limited | Construction | 2025 |
| Winger Press Limited | Manufacturing | 2021 |
| Wings & Wheels Limited | Real estate | 1977 |
| Winkle and Cockle Limited | Financial services | 2025 |
| Winnie & Ed's Showroom Ltd | Wholesale & retail | 2010 |
| Winterburn Capital Limited | Administrative & support | 2019 |
| Withjam Ltd | Construction | 2007 |
| Witzenfeld Holdings Limited | Financial services | 2012 |
| WK Media Consulting Limited | Professional & scientific | 2018 |
| WM & L Ltd | Manufacturing | 2018 |
| WM Spirits Ltd. | Hospitality | 2017 |
| Wobbly Lane Productions Ltd | Arts & recreation | 2012 |
| Wonder Hope Staff Limited | Other services | 2025 |
| Wones Wear Ltd | Wholesale & retail | 2025 |
| Woodbrooke Building & Electrical Services Limited | Construction | 2023 |
| Woodrow Technical Solutions Limited | Information & communication | 2003 |
| Woodside ZR Ltd | Real estate | 2025 |
| Woodstovesuk Limited | Wholesale & retail | 2014 |
| Woodvalley Vineyards Limited | Agriculture & fishing | 2022 |
| Woodward Property Investment Limited | Real estate | 2007 |
| Wordwell Limited | Real estate | 2007 |
| World Express Couriers Limited | Transport & logistics | 2010 |
| World Express Limited | Transport & logistics | 2004 |
| Worldwide Camera Exchange Limited | Wholesale & retail | 2014 |
| Woven Carbon Composites Ltd | Professional & scientific | 2017 |
| WR Automation Ltd | Information & communication | 2008 |
| WRL Development Ltd | Construction | 2026 |
| WSC (South East) Limited | Wholesale & retail | 2020 |
| WTM Finance Consultancy Limited | Professional & scientific | 2017 |
| WTM Finance Ltd | Financial services | 2020 |
| WTR Properties Ltd | Real estate | 2021 |
| Www.Barntraders.Com Ltd | Wholesale & retail | 2021 |
| Wyburn Fabrications Ltd | Manufacturing | 2010 |
| Wycke Holdings Limited | Real estate | 2022 |
| Xceptional Retail Spaces Limited | Professional & scientific | 2011 |
| Xeinadin Billericay Limited | Professional & scientific | 2024 |
| Xenion Consulting Ltd | Professional & scientific | 2023 |
| Xeque-Mate Ltd | Information & communication | 2020 |
| Xlinks 1 Auxiliary Equipment Limited | Construction | 2023 |
| Xlinks 1 Ltd | Construction | 2021 |
| Xlinks First Limited | Professional & scientific | 2021 |
| Xlinks Limited | Information & communication | 2019 |
| Xlinks Third Limited | Professional & scientific | 2023 |
| Yamitsu Research Industries Limited | Professional & scientific | 1990 |
| Yellow Jersey Cycles Limited | Wholesale & retail | 2011 |
| Yelnod Properties Limited | Real estate | 2021 |
| York Membery Limited | Information & communication | 2001 |
| Young Engineers Essex Limited | Education | 2019 |
| Your Life Therapy Ltd | Health & social care | 2026 |