| Wassall Property Holdings Limited | Real estate | 2018 |
| Watad (UK) Properties Limited | Real estate | 2017 |
| Water Research & Development Consultancy Limited | Professional & scientific | 2018 |
| Water Tech (Midland) Limited | Professional & scientific | 2015 |
| Waterbridge Investments Limited | Construction | 2003 |
| Waterloo Homes Limited | Construction | 2001 |
| Waterloo House (Birmingham) Limited | Real estate | 1925 |
| Waterloo Industrial Properties Limited | Real estate | 1989 |
| Watermark Contracts Limited | Wholesale & retail | 2005 |
| Watermeir Ltd | Professional & scientific | 2024 |
| Waterside Gardens Residents Management Company Limited | Households | 2025 |
| Watertight Bath Screens Ltd | Professional & scientific | 2023 |
| Watertight Screens Limited | Manufacturing | 2016 |
| Watpharm Limited | Wholesale & retail | 2016 |
| Wattoobros Ltd | Wholesale & retail | 2025 |
| Wattrus Group Limited | Manufacturing | 1994 |
| Wattrus Group Services Ltd | Construction | 1998 |
| Wattrus Services Limited | Extraterritorial | 2007 |
| Wave Cafe & Catering Ltd | Hospitality | 2023 |
| Wave Park Holdings (Warwickshire) Ltd | Other services | 2023 |
| Wavefrost Ltd | Information & communication | 2018 |
| Wavenet Limited | Wholesale & retail | 2000 |
| Waverley Cottage (Bristol) Limited | Construction | 2021 |
| Waves Tech Ltd | Information & communication | 2025 |
| WAY2SAVE Limited | Wholesale & retail | 2011 |
| WAY2STAY Ltd | Hospitality | 2022 |
| Waysideautomotive Limited | Wholesale & retail | 2024 |
| WBL Investments Limited | Extraterritorial | 2023 |
| WCT Roofing Contractors Limited | Construction | 2010 |
| WD (Anglia Way) Limited | Construction | 2021 |
| WD (Contracts) Limited | Construction | 2021 |
| WD (Evesham) Limited | Construction | 2026 |
| WD (Sheldon) Limited | Construction | 2025 |
| WD (West Works) Limited | Construction | 2020 |
| WD Group Consultants Limited | Construction | 2025 |
| WD Group Limited | Financial services | 2016 |
| WD Solar Systems Limited | Construction | 2025 |
| WE ARE Top Dog Ltd | Arts & recreation | 2021 |
| WE CAN Community CIC | Water & waste | 2023 |
| WE Don'T Byte Limited | Information & communication | 2010 |
| WE Garden Limited | Wholesale & retail | 2021 |
| WE Make Stuff Happen Limited | Professional & scientific | 2008 |
| WE Print 247 Ltd | Professional & scientific | 2023 |
| WE Submit 4 YOU Limited | Professional & scientific | 2017 |
| Wealth & Properties Limited | Real estate | 2020 |
| Wear Canoes Ltd | Administrative & support | 2018 |
| Weardens Ltd | Real estate | 2019 |
| Web Future Limited | Information & communication | 2019 |
| Web UK Media Limited | Information & communication | 2012 |
| WEB2RECRUIT - Consulting Limited | Professional & scientific | 2025 |
| WEB2RECRUIT - Social Care Limited | Administrative & support | 2016 |
| Webb & Sons Ltd | Construction | 2005 |
| Webb Street Management Company Limited | Administrative & support | 2004 |
| Webbtek Ltd | Information & communication | 2016 |
| Webro Contracts Limited | Construction | 2001 |
| Webtraders Limited | Information & communication | 1999 |
| Weekend Delivery Ltd | Transport & logistics | 2017 |
| Weight Loss With LIZ Ltd | Other services | 2023 |
| Weir Management Services Ltd | Professional & scientific | 2011 |
| Welcombe Consultants Limited | Health & social care | 2012 |
| Welcombe Grange Management Limited | Households | 2012 |
| Welcome | Health & social care | 2001 |
| Welcome Change CIC | Administrative & support | 2011 |
| Welcome to Life Community Interest Company | Health & social care | 2025 |
| Weldforce Ltd | Other services | 2017 |
| Welland GAS Services Ltd | Construction | 2013 |
| Wellbridge Consulting Ltd | Information & communication | 2015 |
| Wellington Projects Limited | Real estate | 2021 |
| Wellmossuk Ltd | Administrative & support | 2024 |
| Welp Group UK Ltd | Professional & scientific | 1999 |
| Welten Limited | Administrative & support | 2001 |
| Wemakeweb Ltd | Information & communication | 2021 |
| Wemsi-International (UK) Ltd | Professional & scientific | 2026 |
| Wenlock Rail UK Ltd | Construction | 2016 |
| Wensleydale W & G Limited | Manufacturing | 2017 |
| Wentworth Services Ltd | Real estate | 2020 |
| Wepick Travel Management Limited | Wholesale & retail | 2019 |
| WES Gardner Engineering Ltd | Construction | 2018 |
| Wesecure & Protection Ltd | Administrative & support | 2025 |
| West Briar Consulting Limited | Administrative & support | 2022 |
| West Eagle 2 Ltd | Real estate | 2023 |
| West Eagle Limited | Real estate | 2014 |
| West London Security Centre Limited | Manufacturing | 2015 |
| West Midland Air Conditioning Ltd | Construction | 2018 |
| West Midland Developments Ltd | Construction | 2014 |
| West Midland Vascular Limited | Health & social care | 2019 |
| West Midlands Consultancy Ltd | Professional & scientific | 2015 |
| West Midlands Contracting Ltd | Administrative & support | 2015 |
| West Midlands Education & Skills Limited | Education | 2018 |
| West Midlands Gynaecology Clinic Limited | Health & social care | 2016 |
| West Midlands Institute of Psychotherapy | Health & social care | 1993 |
| West Midlands Maintenance Ltd | Construction | 2025 |
| West Midlands Orthopaedics & Radiology Ltd | Health & social care | 2011 |
| West Midlands Support Homes Limited | Professional & scientific | 2005 |
| West Mids Haulage Ltd | Construction | 2022 |
| West Stone Homes Limited | Real estate | 2024 |
| West Stone Property Services Limited | Real estate | 2024 |
| West Stray Properties Ltd | Real estate | 2026 |
| West Street Investors Limited | Real estate | 2018 |
| West Warwickshire Club Limited | Wholesale & retail | 2002 |