| Warren & Sons Limited | Other services | 2001 |
| Water Brokers Limited | Professional & scientific | 2013 |
| WE ARE Fortis Limited | Professional & scientific | 2023 |
| WE ARE Rockstar Limited | Manufacturing | 2022 |
| Weald Park Garage Limited | Wholesale & retail | 2017 |
| Weatherweave Limited | Manufacturing | 2008 |
| Web Mania (UK) Limited | Information & communication | 2012 |
| Wedo-G&R Ltd | Financial services | 2023 |
| Weeks Essentials Ltd | Wholesale & retail | 2023 |
| Weirside Specialist Contracts Limited | Construction | 2011 |
| Wellaesthetics Limited | Other services | 2025 |
| West Essex Window Repairs Ltd | Construction | 2020 |
| Westbrook Construction Limited | Real estate | 2000 |
| Westbrook Property Group Ltd | Real estate | 2021 |
| Westbrook Property Solutions Limited | Administrative & support | 2026 |
| Westerings Management Ltd | Professional & scientific | 2023 |
| Westfield Motors Holdings Limited | Financial services | 2024 |
| Westfield Motors Limited | Wholesale & retail | 1991 |
| Westward HO Management Company Limited | Real estate | 1983 |
| Wfdgh Ltd | Other services | 2025 |
| Wheeler Yilmaz Ltd | Professional & scientific | 2018 |
| Whirledge & Nott Limited | Real estate | 2011 |
| Wickham Projects Ltd | Professional & scientific | 2025 |
| Wild Track Logistics Ltd | Transport & logistics | 2026 |
| Willark Properties Limited | Real estate | 2023 |
| William Frank Limited | Financial services | 2019 |
| Williams Motorhomes Limited | Wholesale & retail | 2023 |
| Willis Property & Education Ltd | Real estate | 2021 |
| Willo Executive Travel Ltd | Transport & logistics | 2017 |
| Willow Oak Developments Ltd | Financial services | 2021 |
| Wills Limited | Administrative & support | 1997 |
| Wilmaze Essex Limited | Construction | 2017 |
| Wimpy Rayleigh Ltd | Hospitality | 2022 |
| Winaway Property Solutions Ltd | Real estate | 2018 |
| Winged Aesthetics Ltd | Health & social care | 2025 |
| Winn’S Motor’S Ltd | Wholesale & retail | 2023 |
| Wirex Enterprises Ltd | Wholesale & retail | 2018 |
| Witham Court Management Company Ltd | Households | 1988 |
| WIZ Training & Development Limited | Professional & scientific | 2001 |
| Wizobel Ltd | Wholesale & retail | 2025 |
| WKH Development Services Ltd | Real estate | 2018 |
| Woodlands (Basildon) Residents Association Limited | Real estate | 1971 |
| Woolven and Brown Limited | Professional & scientific | 2017 |
| Woolwich Timber Limited | Manufacturing | 1964 |
| Word 4 Word Transcription Ltd | Administrative & support | 2017 |
| Work & Wear Direct Ltd | Wholesale & retail | 2015 |
| Work Less Group Ltd | Information & communication | 2026 |
| Works for ALL Ltd | Professional & scientific | 2020 |
| Worldshowmedia Ltd | Administrative & support | 2016 |
| Worthwhile Construction Ltd | Construction | 2014 |
| Worthwhile Properties Limited | Real estate | 2026 |
| Wowza Solutions Ltd | Administrative & support | 2022 |
| Wragg Bros. (Metal Fabricators) Limited | Manufacturing | 1959 |
| WS Financial Limited | Professional & scientific | 2024 |
| WWS Holdings Ltd | Real estate | 2017 |
| WXY Developments Ltd | Construction | 2017 |
| WYM Legal Limited | Professional & scientific | 2015 |
| Xarin Limited | Professional & scientific | 2017 |
| XX Group Ltd | Professional & scientific | 2022 |
| Yachtdatabank Ltd | Information & communication | 2018 |
| Yagmur Restaurant Ltd | Hospitality | 2024 |
| Yeah Mamma Ltd | Hospitality | 2026 |
| YES Surveys Ltd | Professional & scientific | 2025 |
| Yesteryear Classics (Essex) Limited | Wholesale & retail | 2018 |
| Yndfwd Ltd | Information & communication | 2022 |
| Young’S Mechanical and Electrical Solutions Ltd | Professional & scientific | 2026 |
| Your DJ and More Ltd | Professional & scientific | 2023 |
| Your Ever After Ltd | Health & social care | 2018 |
| Your Holiday Rental Ltd | Real estate | 2025 |
| Your Property Renovations Limited | Real estate | 2025 |
| Your Skin Reborn Limited | Other services | 2022 |
| Yume World (Durham) Ltd | Arts & recreation | 2023 |
| Yume World (Newcastle) Ltd | Arts & recreation | 2019 |
| Zafiral Ltd | Wholesale & retail | 2022 |
| ZC Global Group Limited | Professional & scientific | 2026 |
| Zedekiah Properties Limited | Construction | 2017 |
| Zenck Limited | Administrative & support | 2023 |
| ZERO2FIVE Consulting Ltd | Administrative & support | 2024 |
| Zest Avenue Limited | Hospitality | 2026 |
| Zest Takeaway Ltd | Hospitality | 2019 |
| Zexi Limited | Wholesale & retail | 2025 |
| Zibu Limited | Professional & scientific | 2023 |
| Ziphouse Limited | Real estate | 2016 |