| Wardrop & Co. Limited | Financial services | 1979 |
| Warfield Mews Ltd | Construction | 2018 |
| Warmbase Limited | Construction | 2007 |
| Warner Investments (AGS) Limited | Other services | 2016 |
| Warner Properties (AGS) Limited | Other services | 2016 |
| Warner Properties and Lettings Limited | Real estate | 2017 |
| Warren Farm (Stanway) Management Company Limited | Households | 1992 |
| Warren Farm Five (Stanway) Management Company Limited | Households | 1995 |
| Warren Farm Four (Stanway) Management Company Limited | Households | 1994 |
| Warren Farm Three (Stanway) Management Company Limited | Households | 1993 |
| Warrior Music Limited | Arts & recreation | 2014 |
| Warrior Projects Ltd | Construction | 2019 |
| Warwick Court Property Company Limited | Real estate | 1953 |
| Warwick Performance Nexus Limited | Professional & scientific | 2025 |
| Warwick Place (Chelmsford) Management Company Limited | Households | 1988 |
| Wasana Ltd | Health & social care | 2006 |
| Waste Transport Services Limited | Water & waste | 2004 |
| Wataru Property Ltd | Real estate | 2024 |
| Watchmaker North Limited | Real estate | 2024 |
| Watchorn Holdings Limited | Financial services | 2021 |
| Water Direct Limited | Administrative & support | 1999 |
| Water Heating Solutions Ltd | Construction | 2015 |
| Water Lane Architects Limited | Professional & scientific | 2011 |
| Water Management Consultants Ltd | Administrative & support | 2017 |
| Waterfront Pizza Ltd | Hospitality | 2023 |
| Watergate Healthcare Limited | Administrative & support | 2017 |
| Waterlooville Dental Studio Limited | Health & social care | 2019 |
| Watermills (Water Services) Ltd | Water & waste | 2019 |
| Waterproof Limited | Construction | 2014 |
| Waterside Estates (East Anglia) Limited | Construction | 1987 |
| Waterside Marina Management Company Limited | Households | 2006 |
| Waterside Place Management Company Limited | Households | 2009 |
| Waterside Plaice Essex Ltd | Hospitality | 2025 |
| Waterville Limited | Administrative & support | 2018 |
| Waterwitch Management Company Limited | Households | 2000 |
| Waterworks East Anglia Ltd | Extraterritorial | 2011 |
| Watkins Living Ltd | Real estate | 2026 |
| Watling Consulting Limited | Professional & scientific | 2019 |
| Watoto Limited | Health & social care | 2023 |
| Watson Gray Limited | Financial services | 1970 |
| Watts Carpentry & Construction Ltd | Construction | 2022 |
| Watts Lettings Ltd | Real estate | 2020 |
| Wave Card Ltd | Information & communication | 2022 |
| Wave Networks Ltd | Information & communication | 2022 |
| Waveney Court Management Limited | Households | 1995 |
| Waves Environmental Limited | Manufacturing | 2015 |
| Wawa (UK) Ltd | Manufacturing | 2012 |
| Way Home Estates Ltd | Real estate | 2022 |
| WAY2AUTO Testing Ltd | Information & communication | 2016 |
| Wayfarer Solutions Ltd | Manufacturing | 2022 |
| Wayne Group Ltd | Real estate | 2023 |
| WB Marine Ltd | Manufacturing | 2021 |
| WB Nightingale Ltd | Construction | 2015 |
| WCA2028 Ltd | Administrative & support | 2023 |
| WD Studio Limited | Arts & recreation | 2024 |
| WE ARE Collective Ltd | Information & communication | 2019 |
| WE ARE Commercial Ltd | Financial services | 2018 |
| WE ARE Fuze Ltd | Professional & scientific | 2026 |
| WE ARE Juna Ltd | Health & social care | 2023 |
| WE ARE Mona Ltd | Financial services | 2022 |
| WE ARE Mortgages Ltd | Financial services | 2014 |
| WE ARE Neema Ltd | Professional & scientific | 2024 |
| WE ARE Peach Ltd | Professional & scientific | 2021 |
| WE ARE Skips.Com Ltd | Water & waste | 2020 |
| WE ARE the Minories | Arts & recreation | 2020 |
| WE ARE Vermin Limited | Wholesale & retail | 2020 |
| WE CAN Fulfil IT Ltd | Transport & logistics | 2019 |
| WE CAN Source IT Ltd | Wholesale & retail | 2014 |
| WE DO Your Ltd | Information & communication | 2022 |
| WE FIX Group Limited | Construction | 2019 |
| WE Love Pets Coggeshall Ltd | Other services | 2023 |
| WE Move Van Services Ltd | Construction | 2026 |
| WE Quote Fire Ltd | Professional & scientific | 2024 |
| WE Secure Aviation Limited | Administrative & support | 2026 |
| We-Fix Electrics Ltd | Construction | 2014 |
| Wealth Management Associates Ltd | Financial services | 2022 |
| Wearwhatshewore Limited | Wholesale & retail | 2012 |
| Weathercock Farm (Mersea) Limited | Extraterritorial | 1964 |
| Weavers Meadow (Sudbury) Management Company Limited | Administrative & support | 2016 |
| Web Iapps Ltd | Information & communication | 2011 |
| Web Journal Ltd | Information & communication | 2024 |
| Web Objective Limited | Information & communication | 2012 |
| Web Write Social Limited | Professional & scientific | 2022 |
| Webb & Sons Property Limited | Real estate | 2018 |
| Webb & Sons Vehicle Management Limited | Wholesale & retail | 2024 |
| Webforward Ltd. | Information & communication | 2011 |
| Webites Ltd | Information & communication | 2010 |
| Weblyfy Limited | Information & communication | 2020 |
| Website Design Ltd | Information & communication | 2006 |
| WEBSITES4 Ltd | Information & communication | 2004 |
| Webspeed Limited | Information & communication | 2013 |
| Webworks Digital Ltd | Information & communication | 2022 |
| Weconvey Ltd | Professional & scientific | 2019 |
| Weddings & Events at Kersey Mill Ltd | Hospitality | 2026 |
| Weddings by Design (EA) Ltd | Wholesale & retail | 2012 |
| Wedgewood Court Residents Association Limited | Households | 1988 |
| Weeley Tyre & Exhaust Limited | Wholesale & retail | 2000 |
| Weiaihua Ltd | Hospitality | 2011 |
| WEL Pharm Ltd | Wholesale & retail | 2014 |
| Weldcycle Limited | Real estate | 2001 |