| WE Sale Limited | Wholesale & retail | 2024 |
| WE Take Waste Limited | Extraterritorial | 2015 |
| WEB3CONNECTOR Ltd | Professional & scientific | 2022 |
| Websure Holdings Limited | Financial services | 2014 |
| Websure International (North America) Limited | Information & communication | 2017 |
| Wedding Photo GUY Limited | Professional & scientific | 2022 |
| Wegc Ltd | Real estate | 2026 |
| Wellness Counselling Limited | Health & social care | 2015 |
| Wernick Avdanzer Limited | Manufacturing | 1986 |
| Wernick Buildings Limited | Manufacturing | 1946 |
| Wernick Construction Limited | Construction | 1968 |
| Wernick Event Hire Limited | Hospitality | 2000 |
| Wernick Group (Holdings) Limited | Professional & scientific | 1998 |
| Wernick Hire Limited | Hospitality | 1959 |
| Wernick Power Solutions Limited | Administrative & support | 2019 |
| Wernick Refurbished Buildings Ltd. | Construction | 1997 |
| Wesley Properties Limited | Real estate | 2014 |
| West Accounting Services Limited | Professional & scientific | 2018 |
| West Essex Car Club Limited | Arts & recreation | 1954 |
| West Gallops Residents Association Limited | Households | 1986 |
| West London Steels Limited | Manufacturing | 2022 |
| Westfield Tutors Limited | Education | 2012 |
| Westleighs Saddlery and Country Clothing Limited | Wholesale & retail | 2015 |
| Westwick Grounds & Gardens Ltd | Administrative & support | 2025 |
| Westwood Karate Academy Limited | Education | 2022 |
| Westwood Lodge Management Company (Benfleet) Limited | Households | 1972 |
| Whalebone SWF Ltd | Hospitality | 2026 |
| What 4 Building Solutions Ltd | Construction | 2023 |
| Whatrm Limited | Information & communication | 2020 |
| Whealth Nutrition Limited | Wholesale & retail | 2024 |
| Wheel Masters Wickford Limited | Wholesale & retail | 2024 |
| WHG Mann & SON Ltd | Wholesale & retail | 2003 |
| White Barns Development Ltd | Construction | 2025 |
| White Box Empire Limited | Wholesale & retail | 2022 |
| White Crow Construction Limited | Construction | 2025 |
| White Lace Weddings Ltd | Wholesale & retail | 2023 |
| White Stores Limited | Wholesale & retail | 2008 |
| Whitehall Mews Residents Company Limited | Households | 1994 |
| Whitehill Leisure Farm CIC | Arts & recreation | 2020 |
| Whitemor Property Services Limited | Construction | 2014 |
| Whitlock Contractors Limited | Construction | 2007 |
| Wholesale Automotive (U.K.) Limited | Wholesale & retail | 1986 |
| Wick Community Centre Services Limited | Hospitality | 2006 |
| Wickford 1ST Market Ltd | Wholesale & retail | 2026 |
| Wickford Autocentre Ltd | Wholesale & retail | 2023 |
| Wickford Bowling Club | Arts & recreation | 2003 |
| Wickford Business Improvement District Limited | Administrative & support | 2024 |
| Wickford Car Valeting Group Ltd | Other services | 2026 |
| Wickford Chicken Ltd | Hospitality | 2026 |
| Wickford Construction Ltd | Construction | 2020 |
| Wickford EXP Ltd | Other services | 2025 |
| Wickford Flooring Solutions Limited | Construction | 2008 |
| Wickford Garage (Essex) Limited | Wholesale & retail | 2017 |
| Wickford Garage Limited | Wholesale & retail | 1996 |
| Wickford Gardening and Cleaning Services Ltd | Administrative & support | 2013 |
| Wickford Household Ltd | Wholesale & retail | 2023 |
| Wickford Ltd | Hospitality | 2023 |
| Wickford MOT Services Ltd | Wholesale & retail | 2024 |
| Wickford Mould and Tool Limited | Manufacturing | 2009 |
| Wickford Property Holding Ltd | Real estate | 2025 |
| Wickford Property Management Ltd | Real estate | 2025 |
| Wickford Services Ltd | Other services | 2019 |
| Wickford Takeaway Limited | Hospitality | 2022 |
| Wickford Vehicle Services Ltd | Wholesale & retail | 2011 |
| Wickstead Residents Association Limited | Households | 1992 |
| Wider Insight Group Ltd | Information & communication | 2026 |
| Wiesner Classic Limited | Manufacturing | 2025 |
| Wiesner Design Ltd | Professional & scientific | 2022 |
| Wilchane Holdings Ltd | Financial services | 2024 |
| Wilkes & Co Accountants Ltd | Professional & scientific | 2023 |
| Wilkinson Bell Limited | Construction | 2024 |
| Wilkinsons Business Services Limited | Other services | 2024 |
| Willandmoor Limited | Manufacturing | 1972 |
| William Charles Limited | Real estate | 2009 |
| Williams Paving Ltd | Administrative & support | 2011 |
| Windermere Building Contractors Limited | Construction | 1996 |
| Windmill Investment Limited | Professional & scientific | 1997 |
| Windybay Business Limited | Health & social care | 2021 |
| Winecraft Limited | Manufacturing | 2024 |
| Winged Horse Limited | Wholesale & retail | 2021 |
| Wingers Limited | Extraterritorial | 2014 |
| Winspear Enterprises Limited | Wholesale & retail | 2017 |
| Wintech Services Limited | Administrative & support | 2007 |
| Wireless & Distribution Services Ltd | Information & communication | 2014 |
| Wishbone.Design Ltd | Information & communication | 2019 |
| Wizard Technology Solutions Limited | Information & communication | 2003 |
| WLB (Domestic) Electrical Services Ltd | Construction | 2024 |
| WLB Landscaping and Electrical Ltd | Construction | 2018 |
| WMR Recycling Limited | Water & waste | 2017 |
| Wolfpack Asset Management Ltd | Households | 2024 |
| Wong Labs Ltd | Information & communication | 2026 |
| Woodbine Group Limited | Real estate | 2025 |
| Woodcutts Management (Plots 205-219) Limited | Administrative & support | 1996 |
| Woodgrange Essex Ltd | Transport & logistics | 2010 |
| Woodland Place Properties Ltd | Real estate | 2004 |
| Woods GAS & Heating Ltd | Administrative & support | 2011 |
| Woodys Garden Service Limited | Administrative & support | 2024 |
| Woolford Consulting Limited | Professional & scientific | 2007 |
| Woollens Limited | Real estate | 2001 |
| Woolnough (AC) Limited | Manufacturing | 1991 |