| Welton Memorial Club Ltd | Hospitality | 2019 |
| Wenlock Court Limited | Hospitality | 1998 |
| West Dock Property Limited | Real estate | 2020 |
| West Hall Garth 1954 Limited | Extraterritorial | 2014 |
| What the Hell Just Happened Ltd | Households | 2025 |
| Wheatley Advisory Ltd | Professional & scientific | 2025 |
| White's Travel Limited | Administrative & support | 2006 |
| William's DEN Limited | Arts & recreation | 2015 |
| Wiluan Consulting Limited | Professional & scientific | 2022 |
| Wiluan Property Holdings Ltd | Real estate | 2021 |
| Winslow Parts Limited | Wholesale & retail | 2025 |
| Wintergill Group Ltd | Construction | 2024 |
| Winteringham Yacht Haven Limited | Real estate | 1963 |
| Wiseland Construction Limited | Construction | 1996 |
| Wiseman & Rafique Ltd | Manufacturing | 2022 |
| Wold Property (Welton) Limited | Manufacturing | 2017 |
| Wold Trees Ltd | Agriculture & fishing | 2018 |
| Woldsway Training Limited | Education | 2019 |
| World Shipping Agencies Limited | Transport & logistics | 2015 |
| Worldwide Charter Limited | Transport & logistics | 2014 |
| Worldwide Communications Ltd | Information & communication | 2020 |
| Wrigletz Limited | Manufacturing | 2024 |
| Wynburg Group Limited | Professional & scientific | 2012 |
| Wynburg One Limited | Professional & scientific | 2024 |
| Ymlaen ( Consultants) Limited | Real estate | 2018 |
| Yorkare (Haxby) Ltd | Health & social care | 2018 |
| Yorkare Developments (II) Ltd | Other services | 2020 |
| Yorkare Developments Limited | Construction | 2008 |
| Yorkare Group (Holdings) Ltd | Health & social care | 2018 |
| Yorkare Homes (Bridlington) Limited | Health & social care | 2021 |
| Yorkare Homes (Cleethorpes) Ltd | Health & social care | 2020 |
| Yorkare Homes (Clifton) Limited | Health & social care | 2023 |
| Yorkare Homes (Cottingham) Ltd | Health & social care | 2020 |
| Yorkare Homes (Horsforth) Ltd | Health & social care | 2020 |
| Yorkare Homes (II) Ltd | Other services | 2020 |
| Yorkare Homes (III) Limited | Health & social care | 2023 |
| Yorkare Homes (New Waltham) Ltd | Health & social care | 2021 |
| Yorkare Homes (Rawcliffe) Ltd | Other services | 2021 |
| Yorkare Homes (Sites) Limited | Construction | 2021 |
| Yorkshire Caddy Repairs Limited | Manufacturing | 2013 |
| Yorkshire Consulting Ltd | Professional & scientific | 2016 |
| Yorkshire Financial Planning Ltd | Financial services | 2021 |
| Yorkshire Garden Buildings Limited | Wholesale & retail | 2020 |
| Yorkshire Grown Produce Limited | Agriculture & fishing | 1993 |
| Yorkshire Health Partners Limited | Health & social care | 2013 |
| Yorkshire Period Hotels Limited | Hospitality | 2000 |
| YOU CAN Swim Ltd | Education | 2023 |
| Young Playwrights CIC | Education | 2022 |
| Your Procurement Partner Ltd | Professional & scientific | 2026 |
| Youth Player Development Limited | Education | 2020 |
| Yradiant UK Ltd | Manufacturing | 2020 |
| Yvonne Henderson Jewellery Ltd | Manufacturing | 2021 |
| Zcmi Limited | Information & communication | 2011 |
| ZEAL4HEALTH Limited | Professional & scientific | 2013 |
| Zerocarbon DD Ltd | Professional & scientific | 2019 |
| Zetatek Ltd | Manufacturing | 2018 |
| Zummit Solutions Ltd | Construction | 2025 |