| Waterfall Financial Ltd | Financial services | 2023 |
| Waterhole Bars Ltd | Hospitality | 2024 |
| Waterhole Event Bars Ltd | Hospitality | 2024 |
| Watsdata Ltd | Professional & scientific | 2020 |
| Watt Works Electrical Limited | Construction | 2024 |
| Watts Control Transformer's Ltd | Manufacturing | 2026 |
| Wave Inspections Ltd | Mining & quarrying | 2021 |
| Waves Aerospace Limited | Administrative & support | 2026 |
| Waves Therapy Ltd | Health & social care | 2024 |
| Wavey Events Ltd | Administrative & support | 2019 |
| Wavingtrees Recruitment Ltd. | Information & communication | 2024 |
| Waymaker Construction Ltd | Manufacturing | 2025 |
| Wayne Agar Limited | Real estate | 2022 |
| Wayne H Energy Ltd | Administrative & support | 2025 |
| Wayne's Taxis Limited | Transport & logistics | 2009 |
| WB Civil Engineers Ltd | Construction | 2025 |
| WB Incorporated Ltd | Professional & scientific | 2025 |
| WB Market Quarters Ltd | Real estate | 2023 |
| WB Technical Services Ltd | Manufacturing | 2016 |
| WCH Group Ltd | Real estate | 2021 |
| Wcib Marketing Ltd | Wholesale & retail | 2004 |
| Wcma Ltd | Education | 2019 |
| WE DO Unfiltered Lives CIC | Health & social care | 2025 |
| WE LET the Dogs OUT (NE) Ltd | Other services | 2020 |
| WE Run Point Ltd | Professional & scientific | 2014 |
| Weare Grove Engineering Limited | Professional & scientific | 2026 |
| Wearside Contractors Limited | Construction | 2003 |
| Wearside League Ltd | Arts & recreation | 2015 |
| Webfabricant Limited | Information & communication | 2025 |
| Webxmedia Limited | Information & communication | 2013 |
| Weddingsandpartiesco Limited | Wholesale & retail | 2024 |
| Weir GAS Ltd | Construction | 2024 |
| Weld Integrity Ltd | Professional & scientific | 2026 |
| Well-Being for ME for ALL CIC | Professional & scientific | 2023 |
| Wells Financial (Leeds) Ltd | Financial services | 2021 |
| WEM Controls Ltd | Professional & scientific | 2017 |
| Wentworth Construction (NE) Limited | Construction | 1999 |
| Wentworth Leisure & Hospitality Ltd | Hospitality | 2023 |
| Wentworth Place LLP | | 2006 |
| Wesday Ltd | Wholesale & retail | 2025 |
| West Acres Park Limited | Construction | 2014 |
| West END Science and Technology Limited | Professional & scientific | 2026 |
| West Lodge Care Homes Limited | Health & social care | 1996 |
| West Lodge Holdings Limited | Construction | 2006 |
| West Lodge Property Development Limited | Construction | 2006 |
| Westbourne Street Limited | Health & social care | 2020 |
| Westbrook Investment Ltd | Real estate | 2023 |
| Westfields Rental Limited | Households | 2021 |
| Westland Way 1 Limited | Extraterritorial | 2010 |
| Westland Way 2 Limited | Extraterritorial | 2010 |
| Westland Way 3 LLP | | 2010 |
| Westmead Software Development Ltd | Information & communication | 2014 |
| Westone Hospitality Limited | Hospitality | 2017 |
| Westwood 72 Limited | Construction | 2014 |
| Weterton Feeds Limited | Manufacturing | 2019 |
| Wgncs Ltd | Information & communication | 2025 |
| Whale Hill Limited | Health & social care | 2015 |
| Whale Holdings Limited | Administrative & support | 2023 |
| Wharton Amusements Limited | Professional & scientific | 1962 |
| Wheel Education Ltd | Education | 2016 |
| Wheelchair Executive Ltd | Transport & logistics | 2024 |
| Whessoe Limited | Extraterritorial | 1920 |
| Whingroves Properties Management Company Limited | Households | 2011 |
| Whistlingpig Limited | Hospitality | 2018 |
| White & Bagnall Plastering Contractors Ltd | Construction | 2011 |
| White Horse Real Estate Ltd | Real estate | 2022 |
| White Rose Management (NRY) Limited | Real estate | 2022 |
| Whitebox Property Solutions Ltd | Education | 2014 |
| Whitehead Alloys Limited | Manufacturing | 1980 |
| Whitesmocks Services Limited | Public administration | 2021 |
| Whitfield Healthcare Limited | Health & social care | 2025 |
| WHJ Group Ltd | Construction | 2022 |
| WHOLESALELOTIONSUK1 Limited | Wholesale & retail | 2024 |
| Wildearth Property Limited | Construction | 2023 |
| Wildflowercandles Ltd | Manufacturing | 2023 |
| Wilhan Properties Ltd | Real estate | 2018 |
| Wilhan Property Investments Ltd | Real estate | 2017 |
| Wilkinson Landscapes Limited | Administrative & support | 1995 |
| Wilkinson Plant Centre Limited | Wholesale & retail | 2024 |
| Wilkinson Rail Services Ltd | Construction | 2014 |
| Will Elliot Medical Services Limited | Health & social care | 2016 |
| Willd Products Ltd | Wholesale & retail | 2024 |
| William Brunswick Ltd | Real estate | 2017 |
| Williamson Industries Limited | Extraterritorial | 2022 |
| Willington Healthcare Limited | Administrative & support | 2016 |
| Willington Quay Health Limited | Wholesale & retail | 2025 |
| Willis & Bonnard Properties (NE) Ltd | Real estate | 2020 |
| Willow Bridge Properties Limited | Real estate | 1972 |
| Willow View Care Limited | Administrative & support | 2012 |
| Wilsher Inspection Ltd | Mining & quarrying | 2018 |
| Wilson Homes Group Ltd | Construction | 2024 |
| Wind Mechanical Tech Ltd | Professional & scientific | 2024 |
| Window Warriors Ltd | Construction | 2025 |
| Windows Direct (NE) Ltd | Construction | 2026 |
| Wingrove Motor Company Limited | Wholesale & retail | 1925 |
| Winhux Ltd | Wholesale & retail | 2023 |
| Winkfield Properties Limited | Real estate | 1990 |
| Winmae Properties Ltd | Real estate | 2022 |
| Winoa UK Limited | Administrative & support | 1980 |
| Winterton Park Management Company Limited | Administrative & support | 2001 |