| UK 111 Limited | Financial services | 2021 |
| UK Curbs International Limited | Construction | 2026 |
| UK Curbs Limited | Other services | 2025 |
| Untitled Properties Limited | Real estate | 2015 |
| Upton Grounds Maintenance Limited | Real estate | 2006 |
| Urban Spark Ltd | Construction | 2024 |
| Various Truck Parts Limited | Wholesale & retail | 2005 |
| Vcfit Training Ltd | Arts & recreation | 2024 |
| Vetsonic (UK) Ltd | Agriculture & fishing | 2011 |
| Viral Affiliate Ltd | Professional & scientific | 2024 |
| Visuals Media Limited | Information & communication | 2023 |
| Vtsdesign Web Services Ltd | Professional & scientific | 2017 |
| Vtshosting Ltd | Information & communication | 2017 |
| W Hazell Joinery Ltd | Construction | 2010 |
| W K Heaps Property Ltd | Real estate | 2023 |
| W.S.F. Specialist Marketing Limited | Agriculture & fishing | 2006 |
| Wall Brothers (Yorkshire) Ltd | Construction | 2016 |
| Wall Glamour Limited | Manufacturing | 2010 |
| Walnut Green Management Company Limited | Households | 1990 |
| Ward Engineering Limited | Wholesale & retail | 2010 |
| Wards Gifts Limited | Wholesale & retail | 2015 |
| Watermark Plumbing Supplies Limited | Extraterritorial | 2004 |
| Waugoola Ltd | Hospitality | 2015 |
| WB Enterprises Limited | Construction | 2014 |
| Wcdlaw UK Limited | Administrative & support | 2021 |
| WE ARE Hull Limited | Arts & recreation | 2015 |
| Wellfield Land Limited | Real estate | 2023 |
| Wellsfield Limited | Professional & scientific | 2016 |
| Wequip Ltd | Administrative & support | 2026 |
| West Mill House Farms Limited | Construction | 2006 |
| West Mill House Properties Limited | Real estate | 2024 |
| Western Herbal Medicine Questions Ltd | Education | 2021 |
| Westminster Bookshops Limited | Wholesale & retail | 2004 |
| Wheelgate Fortune Limited | Hospitality | 2026 |
| Whitby Woodwork Ltd | Manufacturing | 2023 |
| Whitehall Derwent Limited | Agriculture & fishing | 2005 |
| Whitehill Lodge Limited | Real estate | 2019 |
| Wigwam Architecture and Build Limited | Construction | 2019 |
| Wild Vape Malton Limited | Wholesale & retail | 2025 |
| Wilford Design & Build Ltd | Construction | 2023 |
| Wilford Property Developments Ltd | Real estate | 2023 |
| Wilkinson Forge Ltd | Real estate | 2023 |
| Wilkinson Smith UK Ltd | Education | 2012 |
| William Thompson (York) Limited | Agriculture & fishing | 1926 |
| Willow Farm Cafe Ltd | Hospitality | 2018 |
| Willowgreen Homes (Yorkshire) Limited | Real estate | 2007 |
| Willowgreen Investments Ltd | Real estate | 2021 |
| Willsher Management & Advisory Services Limited | Professional & scientific | 2021 |
| Window Distribution Holdings Limited | Other services | 2021 |
| Window Distribution Limited | Manufacturing | 1990 |
| Winning Post Property Ltd | Real estate | 2026 |
| Wold Wind Ltd | Energy | 2021 |
| Wolds Architectural Design Services Ltd | Professional & scientific | 2022 |
| Wolds Barn Produce Ltd | Agriculture & fishing | 2020 |
| Wolds Walk Glamping Ltd | Hospitality | 2020 |
| Woldsvale Holdings Ltd | Agriculture & fishing | 2024 |
| Wolfcore Ltd | Information & communication | 2025 |
| Wonder Learning Partnership | Education | 2016 |
| Wood Farm (Hatfield) Limited | Agriculture & fishing | 2012 |
| Wood Nottinghamshire Limited | Professional & scientific | 2025 |
| Woodlands Cars Limited | Wholesale & retail | 2017 |
| Workplace Environment Consultants Ltd | Real estate | 2019 |
| World Heavy Events Association GB Ltd | Arts & recreation | 2026 |
| WR Music Contracting Limited | Information & communication | 2022 |
| WSF Star Group Limited | Financial services | 2023 |
| X Consult Limited | Manufacturing | 1999 |
| Xcell Support Services Limited | Real estate | 2009 |
| Xenia Telunts Ltd. | Wholesale & retail | 2018 |
| York Creatives CIC | Arts & recreation | 2025 |
| York Plastics (Engineering) Limited | Manufacturing | 1959 |
| York School of Jewellery Limited | Education | 2008 |
| Yorkshire Coast and Country Holidays Limited | Hospitality | 2021 |
| Yorkshire Event Bars Limited | Hospitality | 2020 |
| Yorkshire Giftware Limited | Wholesale & retail | 2013 |
| Yorkshire K9 Limited | Other services | 2022 |
| Yorkshire Kitchens and Interiors Limited | Construction | 2018 |
| Yorkshire Laundry Limited | Administrative & support | 2016 |
| Yorkshire Pasta Company Limited | Manufacturing | 2019 |
| Yorkshire Refurbishments & Contractors Limited | Construction | 2021 |
| Yorkshire Rural Properties Ltd | Hospitality | 2026 |
| Yorkshire Specialist Rendering (Harrogate) Ltd | Construction | 2011 |
| Yorkshire Specialist Rendering Ltd | Construction | 2014 |
| Yorkshire Tartan Ltd | Extraterritorial | 2022 |
| Yorkshire Travel Health Ltd | Health & social care | 2025 |
| Yorkshire Wolds Accountancy Limited | Professional & scientific | 2014 |
| Yorkshire Wolds Solutions Limited | Professional & scientific | 2014 |
| Yormed Event Medical Services Limited | Health & social care | 2019 |
| Yormed Limited | Health & social care | 2017 |
| YOU Will BE C.I.C. | Arts & recreation | 2024 |
| Ysbh Group LLP | | 2021 |
| YU CI Limited | Hospitality | 2021 |
| Z3 Advisory Limited | Professional & scientific | 2025 |
| Zalhanen Ltd | Public administration | 2018 |