| Willow and Black Ltd | Professional & scientific | 2024 |
| Willow and Bloom Therapies Ltd | Health & social care | 2025 |
| Willow and Wren Ltd | Administrative & support | 2025 |
| Willow Bear Ltd | Information & communication | 2025 |
| Willow Business Support Limited | Professional & scientific | 2006 |
| Willow Counselling Ltd | Health & social care | 2021 |
| Willow Court (Abergavenny) RMC Limited | Real estate | 2017 |
| Willow House Caravan Park Limited | Hospitality | 2003 |
| Willow Lane (Beverley) Phase 2 Management Company Limited | Households | 2022 |
| Willow Park (Aylsham) Management Company Limited | Households | 2014 |
| Willow's Reach (Heybridge) Residents Management Company Limited | Households | 2026 |
| Willows Veterinary Centre Limited | Extraterritorial | 2009 |
| Willowtree Construction Ltd | Construction | 2026 |
| Wills & Powers Ltd | Extraterritorial | 2025 |
| Wills and Ellis (Service Centre) Ltd | Wholesale & retail | 2011 |
| Wills Lettings Limited | Real estate | 2017 |
| Wills Marquees Limited | Manufacturing | 2025 |
| Wills Marquees Oldco Limited | Manufacturing | 2015 |
| Willsden Steel Limited | Wholesale & retail | 1986 |
| Willy Worms Ltd | Wholesale & retail | 2014 |
| Wilsdale Ltd | Wholesale & retail | 2024 |
| Wilson & Co, Classic Car Restoration Ltd | Wholesale & retail | 2023 |
| Wilson Services Limited | Construction | 2004 |
| Wilson Therapy Services Ltd | Health & social care | 2015 |
| Wilson Veterinary Limited | Professional & scientific | 2004 |
| Wilson's Wheels Limited | Wholesale & retail | 2010 |
| Wilstrop Lodge Estate Management Company Limited | Real estate | 2010 |
| Wilton Court (Pocklington) Management Company Limited | Households | 1994 |
| Wilton Homes (York) Ltd | Construction | 2002 |
| Wilton Rise Limited | Real estate | 1996 |
| Wimborne Freehold (Harrogate) Limited | Real estate | 2022 |
| Wincey Education Ltd | Administrative & support | 2013 |
| Windmill Advisory Services Ltd | Administrative & support | 2025 |
| Windmill View (Stanground) Residents Management Company Limited | Households | 2016 |
| Windows Installations Limited | Construction | 2003 |
| Windrush Place Witney Management Company Limited | Households | 2020 |
| Windsor Court Management Company (York) Limited | Households | 2008 |
| Wine Stories York Ltd | Hospitality | 2020 |
| Wing LEE York Ltd | Hospitality | 2024 |
| Wingsum Limited | Hospitality | 2019 |
| Winifred Limited | Transport & logistics | 2025 |
| Winkcart Ltd | Wholesale & retail | 2025 |
| Winn-Darley Limited | Agriculture & fishing | 2012 |
| Winser Financial Services Limited | Financial services | 2005 |
| Wireless Consultancy Services Limited | Information & communication | 2024 |
| Wireless Watchman Limited | Construction | 2009 |
| Wirestone Limited | Construction | 2023 |
| Wise Solicitors Limited | Professional & scientific | 2011 |
| Wiseyak Ltd | Professional & scientific | 2026 |
| Wishart Estate Agents Limited | Real estate | 2015 |
| Wishart Healthcare Services Ltd | Health & social care | 2016 |
| Wishbone Developments Limited | Real estate | 2005 |
| Wisteria Music Books Limited | Information & communication | 2014 |
| With Many Roots Ltd | Professional & scientific | 2014 |
| WJT Electrical (NE) Ltd | Construction | 2023 |
| Wlchengdu Ltd | Hospitality | 2025 |
| WM Greensmith & SON Limited | Real estate | 1913 |
| WMT Agriculture Ltd | Agriculture & fishing | 2018 |
| WOB Industry Ltd | Information & communication | 2021 |
| Wold Developments Ltd | Construction | 2014 |
| Wold House Farm Limited | Agriculture & fishing | 2019 |
| Wold's Agri Limited | Wholesale & retail | 2014 |
| Woldgate Pastures (Kilham) Management Company Limited | Households | 2018 |
| Wolds Away Ltd | Real estate | 2022 |
| Wolds Developments (York) Limited | Construction | 2025 |
| Wolds Edge Holiday Accommodation Ltd | Hospitality | 2021 |
| Wolds Financial Planning Ltd | Financial services | 2019 |
| Wolds Furniture Ltd | Wholesale & retail | 2007 |
| Wolds Gliding Club Limited | Arts & recreation | 1978 |
| Wolds Heating and Cooling Ltd | Construction | 2022 |
| Wolds Mews (Management Company) Limited | Households | 2005 |
| Wolds Play Therapy Ltd | Extraterritorial | 2024 |
| Wolds Psychology Ltd | Health & social care | 2023 |
| Wolds Shutters Limited | Wholesale & retail | 2021 |
| Wolds View Garage Ltd | Wholesale & retail | 2003 |
| Wolds Way Construction Ltd | Construction | 2016 |
| Wolds Wonders Limited | Professional & scientific | 2026 |
| Woldside Ltd | Wholesale & retail | 2019 |
| Woldvale Group Holdings Limited | Financial services | 2026 |
| Woldvale Group Limited | Financial services | 2026 |
| Woldvale Limited | Real estate | 2026 |
| Wolf Accountants Ltd | Professional & scientific | 2025 |
| Wombell's Auctioneers LLP | | 2010 |
| Wombleton Sports and Recreation Club Limited | Arts & recreation | 2007 |
| Wombwell Developments Ltd | Construction | 2019 |
| Women in Brand Ltd | Other services | 2025 |
| Women.Space Ltd | Real estate | 2018 |
| Wonder-Store Ltd | Wholesale & retail | 2026 |
| Wonderland (Ripon) Ltd | Arts & recreation | 2019 |
| Wonderpick Limited | Arts & recreation | 2009 |
| Wonderworks York Ltd | Wholesale & retail | 2022 |
| Wong MA Ltd | Hospitality | 2024 |
| Wonkystuff Ltd | Manufacturing | 2025 |
| Wood and Stone Developments Limited | Hospitality | 2013 |
| Wood N Pegs Ltd | Manufacturing | 2021 |
| Wood Sherwood LLP | | 2016 |
| Wood Street Mews Limited | Households | 2021 |
| Wood Veterinary Group Limited | Professional & scientific | 2014 |
| Woodable Ltd | Professional & scientific | 2020 |
| Woodacre Consulting Limited | Construction | 2025 |