| W F Mitchell Limited | Construction | 2018 |
| W V Electronics Limited | Professional & scientific | 2015 |
| W.B Removal Recycling Services Ltd | Transport & logistics | 2026 |
| W.Knight Consultancy Ltd | Other services | 2017 |
| Wach Dienst Ltd | Administrative & support | 2025 |
| Wade Home Improvements Ltd | Administrative & support | 2019 |
| Wade Legal Ltd | Professional & scientific | 2023 |
| Waffy Transport Ltd | Transport & logistics | 2024 |
| Wafkai Enterprises Ltd | Real estate | 2026 |
| Walbeck Flips Ltd | Real estate | 2025 |
| Walbow Limited | Construction | 2017 |
| Waldi Project Ltd | Transport & logistics | 2026 |
| Walkers Beauty Ltd | Other services | 2025 |
| Wallstar Interiors Ltd | Construction | 2016 |
| Wallstar Ltd | Construction | 2026 |
| Walsham Investments Limited | Real estate | 1924 |
| Waly London Ltd | Wholesale & retail | 2025 |
| WAM Construction Ltd | Construction | 2014 |
| Wanebi Limited | Health & social care | 2024 |
| Wansum Court Management Company Limited | Households | 2008 |
| Wardman Capital Limited | Financial services | 2025 |
| Warmer Homes Heating & Renewables Limited | Construction | 2014 |
| Warren Heights Road Management Company Limited | Households | 1992 |
| Waru Limited | Professional & scientific | 2004 |
| Warwick Court (Aveley) Management Company Limited | Households | 1984 |
| Wash IT Limited | Construction | 2022 |
| Wastab Engineering Services Limited | Construction | 2014 |
| Watchorn Productions Ltd | Information & communication | 2023 |
| Waterwise Construction Ltd. | Construction | 2025 |
| Watson Consultants (London) Ltd | Other services | 2014 |
| Wattzs Electrical Efficiency Ltd | Construction | 2021 |
| WBP Trans Ltd | Transport & logistics | 2023 |
| WDK Logistik Ltd | Transport & logistics | 2018 |
| WDL Specialists Limited | Construction | 2026 |
| WE ARE Eden Ltd | Information & communication | 2023 |
| WE BE DER Limited | Administrative & support | 2019 |
| WE CAN Foundation Community Interest Company | Education | 2014 |
| WE CAN Leadership Inst Community Interest Company | Education | 2019 |
| WE Fit Solar Solutions Limited | Extraterritorial | 2026 |
| WE Give YOU Flowers Ltd | Information & communication | 2026 |
| WE Love to Party Hire Ltd | Administrative & support | 2022 |
| WE Make Footballers Dagenham LLP | | 2023 |
| WE Make Footballers EAST1517 LLP | | 2023 |
| WE Make Footballers Newham and Hackney LLP | | 2023 |
| WE Make Footballers Newham and Waltham Forest LLP | | 2023 |
| Wealth for Impact Advisory Ltd | Professional & scientific | 2025 |
| Webb & Associates Limited | Professional & scientific | 2020 |
| Webs Cordial Limited | Information & communication | 2021 |
| Webster Miller Holdings Ltd | Real estate | 2017 |
| Webster Miller Limited | Transport & logistics | 1970 |
| WECARE4ALL Ltd | Administrative & support | 2025 |
| Weeee CAN Recycle Limited | Water & waste | 2017 |
| Wegsim Limited | Construction | 2017 |
| Welable Services Ltd | Administrative & support | 2025 |
| Wellaz Limited | Health & social care | 2010 |
| Wellbeing Plus Ltd | Other services | 2009 |
| Welligence Ltd | Information & communication | 2020 |
| Welling Roads (Orsett) Residents Management Company Limited | Real estate | 2013 |
| Wemimz Wholesale Foods Ltd | Wholesale & retail | 2023 |
| Wenow Ltd | Wholesale & retail | 2025 |
| Werndell Management Ltd | Information & communication | 2010 |
| West Thurrock Academy | Education | 2012 |
| West Thurrock Properties Ltd | Real estate | 2024 |
| West Tilbury Estates Limited | Agriculture & fishing | 2008 |
| Westbrook Consultancy Ltd | Information & communication | 2022 |
| Western Impex UK Ltd | Wholesale & retail | 2017 |
| Weston Shipping Agency Ltd | Transport & logistics | 2015 |
| Wetradesimple Ltd | Administrative & support | 2021 |
| Wezzytec Ltd | Information & communication | 2020 |
| WFT Decorators Ltd | Construction | 2018 |
| Wharf Metals Ltd | Water & waste | 2020 |
| Wheel BE Rolle in Ltd | Arts & recreation | 2019 |
| Wheel the World Ltd | Transport & logistics | 2025 |
| White Horse Residential Park Limited | Real estate | 2019 |
| White Noise Studios Ltd | Information & communication | 2024 |
| White Violet Ltd | Information & communication | 2020 |
| White's Sound and Lighting Group Limited | Arts & recreation | 2021 |
| Whizz Bang POP Services Ltd | Construction | 2023 |
| Whytehorse Ltd | Real estate | 2024 |
| Wickford Trampoline Centre Ltd | Arts & recreation | 2016 |
| Wiinz Limited | Professional & scientific | 2007 |
| Wik-Etm Ltd | Financial services | 2024 |
| Wilbrook Management Limited | Administrative & support | 2010 |
| Wilbrook Parks Limited | Hospitality | 2003 |
| Wildcard Crafting & Design Ltd | Professional & scientific | 2026 |
| Wilfranklyn Crisis House Ltd | Professional & scientific | 2021 |
| Wilfranklyn Event Management Limited | Administrative & support | 2016 |
| Wilfranklyn Leadership Consulting Limited | Professional & scientific | 2013 |
| Wilkins Services Ltd | Wholesale & retail | 2014 |
| William Ross Holdings Ltd | Financial services | 2026 |
| Willow Marsh Ltd | Real estate | 2021 |
| Wilton Decorators Limited | Construction | 2008 |
| WIN Trade Ltd | Hospitality | 2017 |
| Winchester Gardens (Tilbury) Management Company Limited | Administrative & support | 1988 |
| Windy Construction Ltd | Construction | 2020 |
| Wine Devil Limited | Financial services | 2023 |
| Winfarma (UK) Ltd | Manufacturing | 2018 |
| Winfarma Trading Limited | Wholesale & retail | 2020 |
| Winginn’It Ltd | Hospitality | 2026 |
| Wingwaze Ltd | Hospitality | 2024 |