| Walker Homes (Yorkshire) Limited | Construction | 2019 |
| Walker Investments (UK) Limited | Real estate | 2006 |
| Walker M&E Limited | Administrative & support | 2019 |
| Walker Plant (Yorkshire) Limited | Administrative & support | 2019 |
| Walker Timber & Fencing Centre Limited | Wholesale & retail | 2001 |
| Walker-Finch Limited | Health & social care | 2021 |
| Walkers Jewellers Limited | Wholesale & retail | 2012 |
| Wall Nook Farming & Contracting Ltd | Financial services | 2025 |
| Wall Nuts Murals Ltd | Professional & scientific | 2008 |
| Wallace Services Limited | Administrative & support | 2022 |
| Walnut River Properties Ltd | Real estate | 2025 |
| Walnut Trading Ltd | Wholesale & retail | 2012 |
| Walsden Flooring Company Limited | Construction | 2011 |
| Walshaw Electrical Services Ltd | Construction | 2016 |
| WAM Lettings Limited | Real estate | 2008 |
| WAM Medical Services Limited | Health & social care | 2013 |
| Wander Beyond Ltd | Professional & scientific | 2023 |
| Ward Decorating Contractors Ltd | Construction | 2011 |
| Ward Green Lodge Ltd | Health & social care | 2014 |
| Warehouse Approved Limited | Wholesale & retail | 2023 |
| Warehouse Students Ltd | Real estate | 2023 |
| Warming Hearts Flowers & Gifts Ltd | Wholesale & retail | 2026 |
| Warmstride Underfloor Heating Ltd | Construction | 2025 |
| Warna Services Limited | Financial services | 2015 |
| Warneford 70 Limited | Extraterritorial | 2014 |
| Warrington Payroll UK Limited | Administrative & support | 2025 |
| WAS Optical Ltd | Health & social care | 2018 |
| Wasabi Fourstar Ltd | Health & social care | 2017 |
| Waseem Saeed Ltd | Health & social care | 2015 |
| Waset Ltd | Wholesale & retail | 2015 |
| Wash & Go (Bradley) Limited | Administrative & support | 2025 |
| Washway Trading Ltd | Hospitality | 2019 |
| Wasim ALI Ltd | Real estate | 2025 |
| Wassana Sawasee Thai Massage Ltd | Other services | 2025 |
| Watan Superstore Ltd | Wholesale & retail | 2023 |
| Watch Shuffle Limited | Information & communication | 2022 |
| Water Compliance Services Limited | Professional & scientific | 2019 |
| Water Industry Forum Limited | Professional & scientific | 2011 |
| Water Leak Detection Limited | Construction | 1998 |
| Wateren Ltd | Professional & scientific | 2023 |
| Waterfall Games Limited | Wholesale & retail | 2024 |
| Waterfront Insurance Brokers Limited | Financial services | 2009 |
| Waterfront Lodge Limited | Hospitality | 1983 |
| Waterloo Fish and Chicks Limited | Hospitality | 2020 |
| Waterloo Health Ltd | Health & social care | 2017 |
| Waterloo Investments 1984 Ltd | Construction | 2017 |
| Waterloo Medical Limited | Real estate | 2024 |
| Waterloo Spice (Hudds) Ltd | Hospitality | 2025 |
| Waterloo Spice B Ltd | Other services | 2026 |
| Waterlow Partners Limited | Health & social care | 2026 |
| Watershed Workshops Ltd | Arts & recreation | 2002 |
| Waterside Consultancy Limited | Professional & scientific | 2004 |
| Waterside Garden Products Limited | Extraterritorial | 2003 |
| Waterside Management Company (Marsden) Limited | Real estate | 2002 |
| Watson Fencing Manufacturers Limited | Professional & scientific | 2009 |
| Watson Head Wind Farm Limited | Energy | 2020 |
| Watson Metal Recycling Limited | Wholesale & retail | 2022 |
| Watsons Plumbing Ltd | Construction | 2021 |
| Watts & Associates (Holdings) Limited | Administrative & support | 2023 |
| Wave Strategies Limited | Professional & scientific | 2006 |
| Wavelogic Solutions Ltd | Information & communication | 2011 |
| Waveplay Ltd | Information & communication | 2007 |
| Waverley AA Group Ltd | Real estate | 2025 |
| Wayland Additive Limited | Manufacturing | 2019 |
| Wayne B Butler & Associates Ltd | Financial services | 2008 |
| Wayne Carmichael Ltd | Transport & logistics | 2017 |
| Wayne Mason Ltd | Transport & logistics | 2007 |
| Wayne's Mechanical Repairs Ltd | Wholesale & retail | 2018 |
| Waypoint Building Practices Ltd | Professional & scientific | 2025 |
| Waypoint Leisure Limited | Real estate | 2012 |
| Wayth Hotels Ltd | Construction | 2023 |
| Wayth-Goole Ltd | Construction | 2023 |
| Wayth-Hebden Bridge Ltd | Construction | 2023 |
| Wazz F.M Ltd | Wholesale & retail | 2023 |
| WBP Limited | Construction | 2020 |
| Wbpc Holding Ltd | Administrative & support | 2020 |
| WCA Ventures Limited | Construction | 2023 |
| WD Taylor Limited | Real estate | 2009 |
| WDC Entertainment Ltd | Other services | 2015 |
| WDC Music Consultancy Ltd | Professional & scientific | 2018 |
| WDI Commercial Cleaning Limited | Administrative & support | 2023 |
| WDL Properties (Yorks) Limited | Real estate | 2022 |
| WDS Interiors Ltd | Wholesale & retail | 2017 |
| WE 3 (UK) Ltd | Information & communication | 2011 |
| WE ARE Elixir Ltd | Professional & scientific | 2025 |
| WE ARE Elixir Studio Ltd | Wholesale & retail | 2024 |
| Wearside Dental Ltd | Health & social care | 2025 |
| Weaver's DEN Limited | Hospitality | 2021 |
| Web Comforts Limited | Information & communication | 2025 |
| Web Fabrications Limited | Manufacturing | 2003 |
| Web UK Studio Limited | Information & communication | 2025 |
| Weblet Limited | Real estate | 2017 |
| Webster (Holdings) Limited | Professional & scientific | 1991 |
| Webster Buchanan Research Limited | Professional & scientific | 2001 |
| Webster Designs & Marketing Ltd | Professional & scientific | 2017 |
| Wecare Mediation & Family Services Ltd | Professional & scientific | 2020 |
| Wedding Bands for Hire Ltd | Other services | 2025 |
| Wedding Content Creator Hub Ltd | Professional & scientific | 2025 |
| Wedofurniture Limited | Wholesale & retail | 2022 |
| Weedfree International Limited | Administrative & support | 2005 |