| Wallace Steel Holdings Limited | Manufacturing | 2026 |
| Wallingwells Ltd | Transport & logistics | 2015 |
| Wallis Court Freehold Limited | Households | 2011 |
| Wallis Court Management Company Limited | Households | 2008 |
| Wallko Limited | Construction | 2025 |
| Wallmax Imports Ltd | Wholesale & retail | 2026 |
| Wallsdeals Limited | Wholesale & retail | 2025 |
| Wally TEH Ltd | Manufacturing | 2019 |
| Wally's Farm (Crick) Ltd | Agriculture & fishing | 2024 |
| Walnut Oaks Ltd | Wholesale & retail | 2025 |
| Walnut Tower Ltd | Real estate | 2014 |
| Walsh Legacy Limited | Financial services | 2026 |
| Walsh Surfacing Limited | Construction | 2000 |
| Walter E. Sturgess & Sons Limited | Wholesale & retail | 1938 |
| Walter Leisure Ltd | Arts & recreation | 2019 |
| Walter Miles (Electrical Engineers) Limited | Construction | 1954 |
| Walter Miles Electrical Limited | Financial services | 2024 |
| Walter Miles Holdings Limited | Financial services | 2017 |
| Walters Architects Limited | Professional & scientific | 2008 |
| Walton Law Ltd | Professional & scientific | 2020 |
| Walton Wagner Build Limited | Construction | 2022 |
| Walton Wagner Limited | Professional & scientific | 2010 |
| Walton Wagner Trustees Ltd | Professional & scientific | 2024 |
| Wamm Investments Ltd | Financial services | 2022 |
| WAN & Co Accountants Ltd | Professional & scientific | 2023 |
| Wanna Plastics Ltd | Wholesale & retail | 2012 |
| Wanna Resources Limited | Wholesale & retail | 2018 |
| Wanna Wardrobes Limited | Professional & scientific | 2007 |
| Wanna Wood Limited | Wholesale & retail | 2018 |
| Wappenbury Ltd | Transport & logistics | 2015 |
| Waraich Group Limited | Transport & logistics | 2025 |
| Waraich Jewels Ltd | Wholesale & retail | 2025 |
| Warburton Building Limited | Construction | 2016 |
| Ward Mann Agencies Ltd | Wholesale & retail | 2020 |
| Ward Merry Building Services Limited | Construction | 2005 |
| Ward's Home Improvements Ltd | Construction | 2022 |
| Wardle Recommended Ltd | Wholesale & retail | 2015 |
| Wardmoore Training & Development Ltd | Administrative & support | 2005 |
| Wardrobe Anarchy Limited | Professional & scientific | 2013 |
| Wardrobe Find Limited | Wholesale & retail | 2026 |
| Warehouse Leicester Ltd | Arts & recreation | 2018 |
| Wareng Ltd | Professional & scientific | 2010 |
| Warley Polishing Company Limited | Manufacturing | 2014 |
| Warm Connect Limited | Construction | 2024 |
| Warm Heart Care Services Ltd | Health & social care | 2025 |
| Warm Homes Heating Installations Ltd | Construction | 2018 |
| Warm Soles Underfloor Heating Company Limited | Construction | 2023 |
| Warm Touch Stores Limited | Wholesale & retail | 2013 |
| Warmfix Ltd | Construction | 2020 |
| Warmlight Ltd | Construction | 2021 |
| Warna Home Ltd | Real estate | 2024 |
| Warna Motors Limited | Wholesale & retail | 2023 |
| Warna Shop Ltd | Wholesale & retail | 2024 |
| Warner Fabrications Limited | Manufacturing | 2020 |
| Warner Holt Financial Services Limited | Financial services | 2015 |
| Warner Textile Machinery Limited | Wholesale & retail | 2001 |
| Warning Zone Limited | Education | 2004 |
| Warren Assets Limited | Real estate | 2015 |
| Warren Page Electrical Ltd | Construction | 2017 |
| Warren Pearce Limited | Professional & scientific | 2023 |
| Warrior Commercial Limited | Financial services | 2021 |
| Warrior Finance Ltd | Financial services | 2017 |
| Warrior Property Group Ltd | Real estate | 2022 |
| Warriors (Leicester) Community Interest Company | Health & social care | 2024 |
| Warsham Ltd | Wholesale & retail | 2018 |
| Warwick Healthcare Limited | Health & social care | 2005 |
| Warwick Lodge Limited | Real estate | 1991 |
| Warwick Optical Ltd | Manufacturing | 2018 |
| Warwickshire Building & Maintenance Limited | Construction | 2005 |
| Warwickshire Medical Limited | Health & social care | 2007 |
| WAS Bazaar Ltd | Wholesale & retail | 2024 |
| Wasco Investments Ltd | Construction | 2026 |
| Wash and Go Wigston Ltd | Administrative & support | 2026 |
| Wash and Tope Hunstanton Ltd | Hospitality | 2024 |
| Wash My Duvet Ltd | Other services | 2023 |
| Wash Plus Ltd | Other services | 2019 |
| Washaroo Ltd | Other services | 2022 |
| Washlogic Limited | Other services | 2023 |
| Washworks Ltd | Manufacturing | 2019 |
| Wasl Social Ltd | Professional & scientific | 2023 |
| Waste Management Assessment Services Limited | Education | 2003 |
| Waste NOT International Ltd | Wholesale & retail | 2022 |
| Waste to Energy Solutions Ltd | Professional & scientific | 2018 |
| Waste Yourself Limited | Arts & recreation | 2005 |
| Wasteease Limited | Water & waste | 2024 |
| Wasteline Services Limited | Water & waste | 1994 |
| Wastewater Training Solutions Limited | Administrative & support | 2018 |
| Watch Warez Limited | Wholesale & retail | 2019 |
| Watches of Switzerland Company Limited | Wholesale & retail | 1917 |
| Watches of Switzerland Limited | Extraterritorial | 1947 |
| Watches of Switzerland Operations Limited | Wholesale & retail | 2004 |
| Wateq Ltd | Wholesale & retail | 2019 |
| Waterberries Limited | Wholesale & retail | 2021 |
| Waterfresh Limited | Real estate | 2016 |
| Waterfront Development Limited | Extraterritorial | 2004 |
| Waterfront Publishing Ltd | Information & communication | 2013 |
| Watergate Logistics Ltd | Transport & logistics | 2014 |
| Watergates (UK) Ltd | Professional & scientific | 2006 |
| Watergates Associates Ltd | Professional & scientific | 2004 |
| Watergates Business Solutions Ltd | Professional & scientific | 2017 |