| W.Stockwell Builders Ltd | Manufacturing | 2017 |
| W3 Applications Ltd. | Extraterritorial | 2017 |
| Wagtails Group Ltd | Other services | 2021 |
| WAH & Co Limited | Wholesale & retail | 2011 |
| Waite Consult Ltd | Professional & scientific | 2026 |
| Waite Surveying Limited | Professional & scientific | 2025 |
| Waites Electrical Ltd | Construction | 2012 |
| Waitlogistics Ltd | Transport & logistics | 2025 |
| Walden Investments Ltd | Financial services | 2021 |
| Walker Engineering (Essex) Limited | Manufacturing | 2001 |
| Walker Holland Engineering Consultancy Ltd. | Professional & scientific | 2014 |
| Wall Street Recruitment Limited | Professional & scientific | 2000 |
| Wallace Construction Essex Ltd | Construction | 2018 |
| Walsh Design and Build Limited | Construction | 2015 |
| Ward Waterproofing Services Limited | Construction | 2018 |
| Wardco Holdings Ltd | Other services | 2017 |
| Warner Chiropractic Limited | Health & social care | 2014 |
| Warton Freight Services (Northern) Limited | Transport & logistics | 1997 |
| Waste Strategy Partners Limited | Professional & scientific | 2025 |
| Waste-A-Way Holdings Limited | Financial services | 2020 |
| Wasteline Strategies Limited | Other services | 2019 |
| Watersports Travel Limited | Professional & scientific | 2021 |
| Waterwatch UK Ltd | Other services | 2024 |
| Watson Moor Property Ltd | Real estate | 2026 |
| Waveforge Ltd | Wholesale & retail | 2025 |
| Waves Choir CIC | Education | 2024 |
| Waves of Fortune Ltd | Real estate | 2023 |
| Wavisanga Services Limited | Other services | 2014 |
| WCR Haulage Limited | Transport & logistics | 2018 |
| WDC Physiotherapy Ltd | Health & social care | 2021 |
| WE ARE MMA Ltd | Health & social care | 2023 |
| WE ARE Re:Made Ltd | Wholesale & retail | 2023 |
| WE Buy ALL Vehicles Ltd | Wholesale & retail | 2023 |
| WE DO Mortgages Ltd | Financial services | 2013 |
| WE DO Property Ltd | Real estate | 2019 |
| WE DO Specialist Finance Ltd | Financial services | 2020 |
| WE11NESS Inc Ltd | Other services | 2023 |
| Weald Handmade Limited | Manufacturing | 2016 |
| Wealth in Health Limited | Health & social care | 2014 |
| Weare HR Services Limited | Administrative & support | 2023 |
| Webb Civil Engineering Ltd | Construction | 2024 |
| Webb Structural Solutions Limited | Construction | 2016 |
| Webconduit Ltd | Information & communication | 2025 |
| Webcreation UK Ltd | Information & communication | 2005 |
| Weddings by Chantelle Ltd | Professional & scientific | 2023 |
| Weeks Rail Limited | Construction | 2013 |
| Welcome to the Rebel Future Limited | Professional & scientific | 2015 |
| WELCOME2CREATION Limited | Wholesale & retail | 2024 |
| Well & Calm Ltd | Professional & scientific | 2019 |
| Well Body Physiotherapy Limited | Health & social care | 2014 |
| Wellbeck Property Management Ltd | Real estate | 2024 |
| Wellco Ventures Ltd | Real estate | 2025 |
| Welldone Logistics Limited | Transport & logistics | 2017 |
| Wellfix Limited | Construction | 2013 |
| Wellman Properties Limited | Real estate | 2022 |
| Wellwise Health Limited | Health & social care | 2022 |
| Wenald Limited | Real estate | 2018 |
| Wenborne and Co Limited | Financial services | 2021 |
| Wenborne Weller & Spooner Limited | Professional & scientific | 2022 |
| West END Voices Ltd | Arts & recreation | 2024 |
| West Lakes Property Lettings Ltd | Real estate | 2023 |
| West Lakes Property Stays Ltd | Real estate | 2025 |
| West Lakes Property Trade Ltd | Construction | 2024 |
| West Leigh Swim School Limited | Health & social care | 2005 |
| West One Plants Limited | Administrative & support | 2004 |
| West Sussex Property Services Limited | Real estate | 2021 |
| Westar Solutions Ltd | Professional & scientific | 2021 |
| Westcliff Anaesthesia and Critical Care Services Limited | Health & social care | 2025 |
| Westcliff Investments Limited | Construction | 2017 |
| Westcliff Property Investments Ltd | Real estate | 2020 |
| Westcliff Travel Service Limited | Extraterritorial | 1995 |
| Westcombe Spice Ltd | Hospitality | 2019 |
| Westerman Homes Ltd | Real estate | 2019 |
| Westfield Motors (Rayleigh) Limited | Wholesale & retail | 2023 |
| Westgate Leigh Limited | Households | 2004 |
| Westlake Properties (Essex) Ltd | Extraterritorial | 2010 |
| Westlake Properties Limited | Construction | 2006 |
| Westwoods Property Group Ltd | Real estate | 2020 |
| Weybridge Concorde Limited | Financial services | 2023 |
| WG & SJ Dell Limited | Agriculture & fishing | 1999 |
| WH Sourcing Ltd | Wholesale & retail | 2023 |
| Wharf Estates Ltd | Hospitality | 2024 |
| Wharf Financial Services Ltd | Financial services | 2018 |
| Wheaton Road Developments Limited | Construction | 2021 |
| Where People Grow Limited | Education | 2021 |
| Whiston Services Limited | Wholesale & retail | 2006 |
| White Acre Holdings Ltd | Financial services | 2025 |
| White Hart Inn Hockley Limited | Hospitality | 2007 |
| White Horizon Ltd | Other services | 2010 |
| White Oaks (Saines Road) Ltd | Real estate | 2026 |
| White Post Building Services Limited | Construction | 2015 |
| White Tooth Care Limited | Health & social care | 2018 |
| White Wolf Creative Ltd | Professional & scientific | 2017 |
| Whitebridge Management Ltd | Professional & scientific | 2022 |
| Whitefly Visualgraphic Limited | Professional & scientific | 2014 |
| Whitehair Group Ltd | Financial services | 2021 |
| Whiteline Property Investments Ltd | Real estate | 2020 |
| Whitepoint Architects Limited | Professional & scientific | 2026 |
| Whoolshots Farm Ltd | Construction | 2024 |
| Whoshungry Limited | Wholesale & retail | 2025 |