| W.H Property Management Ltd | Households | 2025 |
| W.I. Flats Management Company Limited | Households | 1998 |
| W4 Property Development Ltd | Construction | 2020 |
| WA Cars Ltd | Wholesale & retail | 2017 |
| Waddington Estates Ltd | Real estate | 2026 |
| Wades Real Estate Ltd | Real estate | 2024 |
| Wadiya Motor Group Ltd | Wholesale & retail | 2024 |
| WAG N Bone Walking Crew Ltd | Transport & logistics | 2025 |
| Wagely Ltd | Professional & scientific | 2024 |
| Wagon Convenience Store Limited | Wholesale & retail | 2024 |
| Wagstaff's Electrical Services Ltd | Manufacturing | 2023 |
| Wagstaffe Training Limited | Education | 2022 |
| Waha Cultural Group Ltd | Health & social care | 2022 |
| Wahid Solutions Ltd | Professional & scientific | 2019 |
| Wajs Catering Ltd | Hospitality | 2024 |
| Wakefield EYE Clinic Limited | Wholesale & retail | 2023 |
| Wakefield International Ltd | Construction | 2018 |
| Walachia Ltd | Transport & logistics | 2019 |
| Walayat Limited | Real estate | 2015 |
| Waleed Khan Crop Ltd | Wholesale & retail | 2025 |
| Walk Talk Mens Club C.I.C. | Health & social care | 2026 |
| Walker & Co Limited | Professional & scientific | 2014 |
| Walker and Marshall Property Ltd | Construction | 2023 |
| Walker Cutting Limited | Wholesale & retail | 2014 |
| Walker's Pet Cremation Services Ltd | Other services | 2024 |
| WALNUT73 Ltd | Construction | 2014 |
| Walsh & Cutts Investments Limited | Wholesale & retail | 2025 |
| Walshaw Stats Ltd | Information & communication | 2017 |
| Walters Hawson Limited | Professional & scientific | 2001 |
| Wannop Street Holdings Limited | Real estate | 2018 |
| Warcup Developments Ltd | Real estate | 2025 |
| Ward Bespoke Developments Ltd | Construction | 2020 |
| Ward Bespoke Estates Ltd | Real estate | 2021 |
| Wards Nurseries and Garden Centre Limited | Wholesale & retail | 2000 |
| Wards Transport Limited | Transport & logistics | 2005 |
| Wardz-Tc Limited | Wholesale & retail | 2025 |
| Warehouse Electronics Limited | Information & communication | 2003 |
| Warjyz Group Ltd | Financial services | 2026 |
| Warm Roof Conservatory Ltd | Construction | 2019 |
| Warmglow Heating Services Ltd | Construction | 2023 |
| Warrender & Johnson Limited | Manufacturing | 2008 |
| Warrington One Holdings Ltd | Administrative & support | 2026 |
| Warwick Residences Ltd | Real estate | 2024 |
| Wash Away Yorkshire Ltd | Administrative & support | 2023 |
| Wassenburg Limited | Manufacturing | 1997 |
| Waste Recycling Solutions Limited | Water & waste | 2010 |
| Wastemaster Energy Limited | Water & waste | 2017 |
| Water by Nature Rafting Journeys Limited | Administrative & support | 1998 |
| Water Environmental Treatment Limited | Water & waste | 1992 |
| Waterdale SS Ltd | Administrative & support | 2007 |
| Waterfront DM Limited | Professional & scientific | 2016 |
| Waterloo SPV Ltd | Real estate | 2026 |
| Waterman Corporate Enterprises Limited | Manufacturing | 2012 |
| Watermans World Ltd | Wholesale & retail | 2019 |
| Watflo Systems Limited | Manufacturing | 2015 |
| Wath - Upon - Dearne Community Partnership | Arts & recreation | 2000 |
| Wath Barbers Limited | Other services | 2025 |
| Wath Boarding Kennels Ltd | Other services | 2018 |
| Wath Breakers Ltd | Wholesale & retail | 2024 |
| Wath Business Park Ltd | Financial services | 2026 |
| Wath Carpets and Beds Limited | Wholesale & retail | 2024 |
| Wath Golf Club Group Limited | Arts & recreation | 2026 |
| Wath Golf Club Practice Limited | Arts & recreation | 2026 |
| Wath Group Limited | Manufacturing | 1980 |
| Wath Hall Limited | Administrative & support | 2015 |
| Wath Health + Fitness Hub Ltd | Arts & recreation | 2024 |
| Wath Holdings Ltd | Real estate | 2021 |
| Wath Plaza Limited | Real estate | 2016 |
| Wath Spice Ltd | Hospitality | 2026 |
| Wath Sports & Social Club Limited | Hospitality | 2013 |
| Wath Tyres Ltd | Wholesale & retail | 2025 |
| Wath Vehicle Sales Ltd | Wholesale & retail | 2025 |
| Wath-Upon-Dearne Rugby Union Football Club | Arts & recreation | 2010 |
| Wathonian Property Ltd | Real estate | 2024 |
| Watson & SON Scaffolding Ltd | Construction | 2023 |
| Watson Safety Ltd | Professional & scientific | 2020 |
| Watts & Thompson Limited | Financial services | 1999 |
| Watts Engineering Services Limited | Manufacturing | 2005 |
| Watts Grand Developments Limited | Real estate | 2025 |
| Watts Living Ltd | Real estate | 2026 |
| Waverley Community Management Company Limited | Real estate | 2012 |
| Wawa Concept Ltd | Administrative & support | 2017 |
| WAZ Collectibles Ltd | Wholesale & retail | 2026 |
| Wazir B Ltd | Health & social care | 2015 |
| WB Developments (Mansfield) Ltd | Professional & scientific | 2024 |
| WB Processing Limited | Wholesale & retail | 2024 |
| WBC Plastering Services Limited | Construction | 2025 |
| WC Cladding Solutions Limited | Construction | 2023 |
| WD Comptech Limited | Manufacturing | 2025 |
| WD Hydrotech Limited | Manufacturing | 2021 |
| WDM Mortgages Limited | Financial services | 2022 |
| WE Buy Back Ltd | Wholesale & retail | 2025 |
| WE Care Rotherham Ltd | Health & social care | 2023 |
| WE Know Beds Limited | Real estate | 2019 |
| WE LET Homes Ltd | Real estate | 2013 |
| WE Work Hard Limited | Professional & scientific | 2011 |
| Weatherstone's Trees Ltd | Wholesale & retail | 2025 |
| Weaver Tree Care Ltd | Agriculture & fishing | 2024 |
| Web Habit Ltd | Professional & scientific | 2022 |
| Webb Butchers Limited | Wholesale & retail | 2021 |