| Westbury Homes (South West) Limited | Extraterritorial | 1980 |
| Westbury Homes (Stadium) Limited | Extraterritorial | 1935 |
| Westbury Homes (Venymore) Limited | Extraterritorial | 1989 |
| Westbury Homes (Wales) Limited | Extraterritorial | 1980 |
| Westbury Homes (West Midlands) Limited | Extraterritorial | 1980 |
| Westbury Housing Investments Limited | Construction | 2007 |
| Westbury Limited | Financial services | 1984 |
| Westcaster Ilington Limited | Professional & scientific | 2025 |
| Westchester Publishing Services UK Limited | Information & communication | 2018 |
| Westcliffe Property Ltd | Real estate | 2024 |
| Westcote Computing Limited | Information & communication | 1991 |
| Westcroft York Ltd | Extraterritorial | 2021 |
| Westerdale Court Limited | Households | 1982 |
| Westerdale Properties Limited | Real estate | 1998 |
| Westfield Farm Management Company Limited | Administrative & support | 2002 |
| Westfield House Flats Limited | Households | 2017 |
| Westfield Lodge Limited | Professional & scientific | 2002 |
| Westfield Safety Services Ltd | Professional & scientific | 2017 |
| Westfield Unit 6 Limited | Financial services | 2021 |
| Westgate (York) Limited | Households | 2002 |
| Westgate Properties (York) Ltd | Real estate | 2025 |
| Westhaven Apartments (Barry) Residents Management Company Limited | Households | 2016 |
| Westmoreland Builders Limited | Construction | 2003 |
| Westmoreland Douglas Associates Ltd | Real estate | 2021 |
| Westmoreland Douglas Holdings Limited | Real estate | 2025 |
| Weston Park Limited | Households | 2010 |
| Weston Property Limited | Real estate | 2016 |
| Westore Self Storage Limited | Wholesale & retail | 2013 |
| Westow Country Holidays Limited | Hospitality | 2022 |
| Westow International Limited | Hospitality | 2021 |
| Westpit Lane Land Owners Ltd | Other services | 2015 |
| Westpoint Group Trading Limited | Financial services | 2014 |
| Westside Veterinary Clinic Limited | Professional & scientific | 2010 |
| Westway Veterinary Centres Limited | Professional & scientific | 2010 |
| Westwick Capital Limited | Financial services | 2019 |
| Westwick Lock House Limited | Hospitality | 2024 |
| Westworth Wealth Management Ltd | Professional & scientific | 2024 |
| WET Rooms to Go Limited | Extraterritorial | 2012 |
| Wetcover Limited | Manufacturing | 1985 |
| Wether House Limited | Hospitality | 2013 |
| Wetheralds Sherburn Ltd | Construction | 2020 |
| Wetherby GAS Limited | Construction | 2006 |
| Wetwheels Yorkshire C.I.C. | Arts & recreation | 2016 |
| WF Legacy Holdings Limited | Financial services | 2023 |
| WG Flooring Direct Ltd | Wholesale & retail | 2020 |
| Wgnp Limited | Real estate | 2024 |
| WGT Holdings Ltd | Financial services | 2023 |
| WH (York) Limited | Extraterritorial | 1949 |
| WH Planning Ltd | Professional & scientific | 2025 |
| Wharfedale Sports Limited | Professional & scientific | 2023 |
| Wharton & Sons (York) Ltd | Construction | 2025 |
| Wharton Myles Investments Limited | Real estate | 2026 |
| What Users Need Ltd | Information & communication | 2018 |
| What's for Tea? Ltd | Hospitality | 2026 |
| What's Possible Limited | Administrative & support | 2012 |
| Whatsizeami.Co.Uk Limited | Extraterritorial | 2017 |
| Whatts Autos Limited | Wholesale & retail | 2023 |
| Wheatlands Lodge Hotel (York) Limited | Hospitality | 2021 |
| Wheatlands Lodge Hotel LLP | | 2019 |
| Wheatley Infrastructure Services Limited | Construction | 2022 |
| Wheldrake Advisors Limited | Other services | 2017 |
| Wheldrake Classic Cars Limited | Wholesale & retail | 2018 |
| Wheldrake Healthcare Limited | Wholesale & retail | 2016 |
| Wheldrake Lettings Ltd | Real estate | 2026 |
| Where Bluebirds FLY Ltd | Wholesale & retail | 2020 |
| Whessoerd Ltd | Information & communication | 2016 |
| Whin AI Ltd | Professional & scientific | 2026 |
| Whip-Ma-Whop-Ma Ltd | Real estate | 2021 |
| Whistles of York Limited | Real estate | 2013 |
| Whistling Grandad Limited | Real estate | 2019 |
| Whitby C.Oliver & Sons Limited | Transport & logistics | 1926 |
| Whitby Engine Shed Management Company Ltd | Households | 2026 |
| Whitby Galleries Limited | Wholesale & retail | 2016 |
| Whitby GAS and OIL Services Ltd | Construction | 2020 |
| Whitby Tanks Limited | Manufacturing | 1992 |
| Whitchester Hall Limited | Professional & scientific | 2025 |
| White Dental Limited | Health & social care | 2025 |
| White Flower Properties Limited | Real estate | 2021 |
| White Gables Properties Limited | Real estate | 2012 |
| White Hart Homes Limited | Professional & scientific | 2017 |
| White Hill Commercials Ltd | Wholesale & retail | 2017 |
| White Hill Fabrication Ltd | Professional & scientific | 2022 |
| White Horse Events Ltd | Hospitality | 2025 |
| White House Medical Services Ltd | Health & social care | 2026 |
| White Lotus Medical Ltd | Health & social care | 2023 |
| White Napkin Strategy Limited | Construction | 2019 |
| White Property Management Ltd | Real estate | 2012 |
| White Rose (York) Limited | Hospitality | 2009 |
| White Rose Accounting Ltd | Professional & scientific | 2010 |
| White Rose Bars Limited | Hospitality | 2026 |
| White Rose Chiropody Limited | Other services | 2008 |
| White Rose Commercials Ltd | Wholesale & retail | 2021 |
| White Rose Community Care Services Ltd | Health & social care | 2017 |
| White Rose Contractors Ltd | Construction | 2025 |
| White Rose Electrical (Yorkshire) Ltd | Construction | 2025 |
| White Rose Electrical Ltd | Construction | 2019 |
| White Rose Engineering Solutions Ltd | Professional & scientific | 2025 |
| White Rose Fencing and Groundwork Ltd | Administrative & support | 2025 |
| White Rose Gardening Limited | Administrative & support | 2026 |
| White Rose Herbal Clinic Ltd | Wholesale & retail | 2026 |