| Whittaker Intelligent Asset Management Solutions Ltd | Professional & scientific | 2025 |
| Whittaker IT Limited | Information & communication | 2024 |
| Whittingham Social Work Limited | Professional & scientific | 2008 |
| Whittle Rise (Birch) Management Company Limited | Households | 2024 |
| Whitton Cost Consultancy Limited | Administrative & support | 2014 |
| Whitwood Limited | Financial services | 2023 |
| Whitwood Properties Limited | Real estate | 2020 |
| Whls Project Solutions Ltd | Construction | 2022 |
| WHO Does Your Marketing Ltd | Professional & scientific | 2025 |
| Whooley Groundworks Ltd | Construction | 2024 |
| WHP (Holdings) Limited | Financial services | 2013 |
| WHP Telecoms Limited | Construction | 1998 |
| WHS Limited | Construction | 2020 |
| Why?Events Limited | Other services | 2020 |
| Whyever NOT Limited | Other services | 2017 |
| Whyman's Foundry Company Limited | | 1965 |
| WI Hear Limited | Health & social care | 2013 |
| Wicker Wings Limited | Wholesale & retail | 2015 |
| Wideline Investigations Limited | Administrative & support | 2025 |
| Widheath Ltd. | Real estate | 2014 |
| Wife to BE (Runcorn) Limited | Wholesale & retail | 2016 |
| Wife to BE (Widnes) Limited | Wholesale & retail | 2016 |
| Wife to BE Limited | Wholesale & retail | 2010 |
| Wight Streetworks Limited | Administrative & support | 2026 |
| Wigs-It Ltd | Information & communication | 2018 |
| Wigwam Training & Consultancy Limited | Information & communication | 2015 |
| Wil-Test Solutions Ltd | Construction | 2020 |
| Wilan Associates Ltd | Information & communication | 2025 |
| Wilberforce Whitelaw (North) Limited | Financial services | 1998 |
| Wilbon Limited | Wholesale & retail | 2022 |
| Wilcrom Ltd | Professional & scientific | 2020 |
| Wild Cherry Properties LLP | | 2026 |
| Wild River Films Limited | Information & communication | 2015 |
| Wildcat Design Services Limited | Administrative & support | 2007 |
| Wilde Bloom Creative Ltd | Wholesale & retail | 2018 |
| Wilde Brickwork Ltd | Construction | 2022 |
| Wilde Consultancy Ltd | Administrative & support | 2021 |
| Wilde Consulting Ltd | Information & communication | 2016 |
| Wilde Engineering Ltd | Administrative & support | 2023 |
| Wilde Gardens Limited | Administrative & support | 2019 |
| Wilde Recruitment Ltd. | Administrative & support | 2001 |
| Wildebeest Webtech Limited | Information & communication | 2019 |
| Wildflower Growth Ltd | Information & communication | 2021 |
| Wildish Construction Ltd | Construction | 2019 |
| Wildwood Consulting Limited | Administrative & support | 2024 |
| Wilfredson Holdings Ltd | Financial services | 2021 |
| Wilk Holdings Ltd | Hospitality | 2015 |
| Wilk Trade Ltd | Extraterritorial | 2019 |
| Wilkan Limited | Construction | 2007 |
| Wilkins Software Consulting Limited | Administrative & support | 2014 |
| Wilkinson Consultancy Solutions Limited | Administrative & support | 2010 |
| Wilkinson Environmental Services Limited | Construction | 2016 |
| Wilkinson Weld Limited | Wholesale & retail | 2007 |
| Will Design Ltd | Professional & scientific | 2019 |
| Will Makers of Sheffield Ltd. | Professional & scientific | 2010 |
| Willany Limited | Manufacturing | 2010 |
| William Bartram Construction Services Limited | Public administration | 2015 |
| William Mini Market Ltd | Wholesale & retail | 2024 |
| William-James Allen Ltd | Extraterritorial | 2025 |
| Williams Drone Services Ltd | Construction | 2025 |
| Williams FIC Limited | Financial services | 2020 |
| Williams Home Improvements Ltd | Construction | 2025 |
| Williams Tarr Investment Properties Limited | Real estate | 2003 |
| Williamsons Joinery & Building Contractors Limited | Construction | 2001 |
| Willie Wurst Limited | Extraterritorial | 2012 |
| Willis Vaughan Consultancy Ltd | Professional & scientific | 2025 |
| Willmoor Solar Limited | Construction | 2025 |
| Willow Bank (Ramsbottom) Management Company Limited | Households | 2025 |
| Willow Grace Consultancy Ltd | Construction | 2022 |
| Willow Green Barns (Little Leigh) Management Company Ltd | Real estate | 2023 |
| Willow Tree Consultants Limited | Professional & scientific | 2025 |
| Willow Tree HR Ltd | Administrative & support | 2020 |
| Willows Developments Limited | Construction | 2004 |
| Willows Landscapes Ltd | Administrative & support | 2023 |
| Willows Properties Lowton Ltd | Real estate | 2016 |
| Wilmslow Home Renovations Limited | Construction | 2019 |
| Wilmslow Light Haulage Limited | Transport & logistics | 1996 |
| Wilrob Properties Limited | Construction | 2002 |
| Wilson Compliance Services Ltd | Administrative & support | 2026 |
| Wilson Patten Holdings Limited | Real estate | 2015 |
| Wilson Patten Services Limited | Real estate | 2025 |
| Wilson Reed Solicitors Limited | Professional & scientific | 2026 |
| Wilson Scientific Ltd | Professional & scientific | 2019 |
| Wilson Stirling Ltd | Information & communication | 2012 |
| Wilsons Motor Company Limited | Wholesale & retail | 2019 |
| Wilton Meadows Ltd | Hospitality | 2021 |
| Wilton Solutions Limited | Administrative & support | 2021 |
| WIM Bliss Kingdom Limited | Hospitality | 2025 |
| Wimberry Limited | Administrative & support | 2016 |
| Wimbledon Park Consulting Limited | Professional & scientific | 2022 |
| Winash Properties Limited | Real estate | 2010 |
| Winasmile Limited | Professional & scientific | 2026 |
| Winchester Health Care (Shrewsbury) Limited | Education | 1987 |
| Windale Properties Limited | Real estate | 2015 |
| Windermere Engineering Ltd | Manufacturing | 2021 |
| Windmill Oakes Limited | Administrative & support | 2025 |
| Window Dream Machine Limited | Wholesale & retail | 2003 |
| Winds Strategy & Advisory Consulting Ltd | Professional & scientific | 2022 |
| Windshore Innovations Ltd | Administrative & support | 2024 |
| Windswept Services Limited | Construction | 2019 |