| Welba Construction Ltd | Construction | 2018 |
| Welbourne Opticians Ltd | Wholesale & retail | 2002 |
| Welcome Home UK Guardians Ltd | Education | 2022 |
| Welding Engineering Limited | Extraterritorial | 2001 |
| Weldtech Solutions (NW) Ltd | Construction | 2025 |
| Wendy Diddams Limited | Wholesale & retail | 2006 |
| Wessex Hearing Care Limited | Wholesale & retail | 2021 |
| West Pennine Slings CIC | Administrative & support | 2014 |
| Western Isles Insulation Ltd | Professional & scientific | 2018 |
| Westgate Place (Wakefield) Management Company Limited | Other services | 2020 |
| Westwood GAS Services Ltd | Manufacturing | 2019 |
| Whalley Construction Limited | Construction | 2016 |
| Whalley Joinery and Construction Ltd | Construction | 2019 |
| Wheatley Place Management Company Limited | Other services | 2022 |
| Wheelbase Engineering Limited | Manufacturing | 1984 |
| Wheelbase Group Limited | Financial services | 2019 |
| Wheelbase Holdings Limited | Financial services | 2006 |
| Wheelplan Engineering Limited | Real estate | 1996 |
| White City NW Limited | Extraterritorial | 2016 |
| White City Properties Limited | Real estate | 2013 |
| Whitehall Interiors Limited | Wholesale & retail | 2006 |
| Whitehall News Ltd | Wholesale & retail | 2023 |
| Wigram & Ware,Limited | Wholesale & retail | 1920 |
| Wild Card Gym C.I.C. | Arts & recreation | 2026 |
| Willetts & Doig Ltd | Wholesale & retail | 2019 |
| William Hartley Neild Ltd | Extraterritorial | 2024 |
| Williams Architectural Design Limited | Professional & scientific | 2024 |
| Williamson's Decking & Fencing Ltd | Construction | 2023 |
| Williamson's Landscaping Ltd | Construction | 2025 |
| Willow Tree (Heckmondwike) Management Company Limited | Other services | 2021 |
| Withnell Developments Limited | Construction | 2023 |
| Withnell Sensors Holdings Limited | Financial services | 2024 |
| Withnell Sensors Limited | Professional & scientific | 2006 |
| Wivenhoe Eyes Open Ltd | Health & social care | 2004 |
| Wizlogic Ltd | Information & communication | 2020 |
| WJ Purcell & Sons Ltd | Construction | 2020 |
| WK Media Ltd | Information & communication | 2026 |
| Wolfhole Limited | Other services | 2018 |
| Wood & Butler Transport (Darwen) Limited | Professional & scientific | 1974 |
| Wood Street Optical Limited | Wholesale & retail | 2024 |
| Woodchip & Magnolia Limited | Manufacturing | 2017 |
| Woodside House Care Ltd | Health & social care | 2003 |
| Woolley Construction Ltd | Construction | 2004 |
| Wordwise Ltd | Professional & scientific | 2023 |
| Wright Engineers Global Limited | Professional & scientific | 2024 |
| Wrist Tech Ltd | Wholesale & retail | 2025 |
| WSC Products UK Ltd | Administrative & support | 2016 |
| WSM Optical Limited | Wholesale & retail | 2012 |
| Wynn Hitchon Limited | Construction | 2022 |
| Wynne Audiology Ltd | Wholesale & retail | 2019 |
| Xaja XDR Limited | Other services | 2026 |
| Xenova Consulting Ltd | Administrative & support | 2017 |
| Xosquare Limited | Professional & scientific | 2020 |
| Xpert POS Ltd | Wholesale & retail | 2016 |
| Xtratrax Entertainment Limited | Arts & recreation | 2024 |
| Xyzb Auto Repair Ltd | Wholesale & retail | 2025 |
| Y&S Optical Group Limited | Wholesale & retail | 2008 |
| Yannis G Ltd | Information & communication | 2026 |
| Yara&Ara Limited | Wholesale & retail | 2025 |
| Yates & Suddell (Walkden) Limited | Health & social care | 2000 |
| Yates Entrance Solutions Ltd | Construction | 2018 |
| Yates Property Lettings Ltd | Real estate | 2025 |
| YAY OR NAY Limited | Information & communication | 2022 |
| YES Hot Ashes Limited | Information & communication | 2023 |
| Yesofy Ltd | Water & waste | 2022 |
| YI Woks Ltd | Manufacturing | 2025 |
| Yoga Love Collective Retreats Ltd | Administrative & support | 2023 |
| Yoga Love Collective Training Ltd | Arts & recreation | 2023 |
| Yorkshire Care Group Ltd | Health & social care | 2023 |
| Yorkshire Concrete and Construction Limited | Construction | 2025 |
| Yorkshire Paving Ltd | Administrative & support | 2024 |
| YOU KOU FOO Ltd | Hospitality | 2025 |
| Your Choice Convenience Store Ltd | Wholesale & retail | 2017 |
| YPM (NW) Ltd | Financial services | 2024 |
| Yusuf Limited | Extraterritorial | 2000 |
| Zazu Technologies Limited | Information & communication | 2013 |
| ZED & Noon Ltd | Wholesale & retail | 2021 |
| Zenista Limited | Real estate | 2011 |
| ZJ Consultants Limited | Professional & scientific | 2023 |
| Zubair & Sons Limited | Wholesale & retail | 2026 |