| White Star Fulfilment Ltd | Administrative & support | 2017 |
| White Strategies Limited | Real estate | 2018 |
| White Swan Kirkburton Ltd | Hospitality | 2025 |
| White Wolf Bushcraft Survival School Ltd | Education | 2018 |
| Whitechariot Limited | Transport & logistics | 2023 |
| Whiteford (Felt & Fillings) Limited | Manufacturing | 1993 |
| Whitehead Legal Education Limited | Education | 2024 |
| Whitehead Plumbing & Heating Ltd | Construction | 2025 |
| Whiteley & Green Limited | Administrative & support | 2024 |
| Whiteridge Developments Ltd | Construction | 2020 |
| Whiteridge Wealth Management Limited | Financial services | 2015 |
| Whitestone Garage Ltd | Wholesale & retail | 2024 |
| Whitley Willows Land Limited | Real estate | 2015 |
| Whitmore Payne Ltd | Real estate | 2019 |
| Whittle Design Studio Limited | Information & communication | 2016 |
| Whiz Wash Cleaning Ltd | Administrative & support | 2023 |
| WHO IS Isaac Limited | Information & communication | 2019 |
| Whole N Sale Ltd | Wholesale & retail | 2025 |
| WHP Group Ltd | Professional & scientific | 2018 |
| Whsr Ltd | Real estate | 2025 |
| Whyteside Consulting Services Limited | Professional & scientific | 2022 |
| Wicresoft UK Limited | Information & communication | 2019 |
| Widecover Holdings Limited | Financial services | 2019 |
| Wigwam Limited | Real estate | 2008 |
| Wiivos Limited | Health & social care | 2016 |
| Wild Dance Limited | Arts & recreation | 2022 |
| Wild Experience Limited | Hospitality | 2026 |
| Wild Gold PMO Limited | Professional & scientific | 2024 |
| Wild Living Limited | Wholesale & retail | 2022 |
| Wild Oak Roots Ltd | Agriculture & fishing | 2025 |
| Wild Public Relations Limited | Professional & scientific | 2014 |
| Wildfell Holdings Ltd | Real estate | 2020 |
| Wildspur Mills Management Company Limited | Households | 2004 |
| Wildtrax Audio Ltd | Manufacturing | 2014 |
| Wildwood Digital Limited | Professional & scientific | 2018 |
| Wilkinson Builders Limited | Construction | 2012 |
| Wilkinson Woodward Holdings Limited | Financial services | 2024 |
| Will Building Projects Ltd | Construction | 2024 |
| Will Power Fitness Ltd | Arts & recreation | 2025 |
| Willans Woodcraft Ltd | Manufacturing | 2017 |
| Willars Property Co Ltd | Real estate | 2026 |
| William B. Swift Limited | Manufacturing | 1951 |
| William Barraclough Limited | Professional & scientific | 2018 |
| William Cran Consultancy Ltd | Professional & scientific | 2025 |
| William Holroyd & Sons Limited | Real estate | 1932 |
| William Thompson Fine Cloths (Huddersfield) Limited | Manufacturing | 2013 |
| Williams & Co (Huddersfield) Limited | Professional & scientific | 2024 |
| Williams & Co Accommodation Ltd | Hospitality | 2026 |
| Williams & Co Staycations/Property Ltd | Real estate | 2024 |
| Williams Lawncare Ltd | Real estate | 2017 |
| Williamson Groundworks Limited | Administrative & support | 2014 |
| Willivers Limited | Wholesale & retail | 2023 |
| Willow & Bean Co. Ltd | Financial services | 2024 |
| Willow Developments (Camblesforth) Ltd | Construction | 2019 |
| Willow Developments (Drax) Management Company Limited | Households | 2017 |
| Willow Developments (Howden) Ltd | Construction | 2015 |
| Willow Developments (Walkington) Ltd | Construction | 2019 |
| Willow Developments Howden Management Company Limited | Households | 2016 |
| Willow Holmes Limited | Professional & scientific | 2025 |
| Willow House Residential Home Limited | Health & social care | 2018 |
| Willow Luxury Retreats Ltd. | Real estate | 2015 |
| Willow Tree Healthcare Limited | Health & social care | 2015 |
| Willow Wood Care Ltd | Health & social care | 2021 |
| Willows Garth Ltd | Real estate | 2023 |
| Willows Grove Ltd | Health & social care | 2025 |
| Wills,Probate & More Ltd | Professional & scientific | 2009 |
| Wilmarsam Limited | Real estate | 1957 |
| Wilson Court Flats Limited | Real estate | 2024 |
| Wilson Roofing Services Limited | Construction | 2025 |
| Wilsonsbuildingprojects Ltd | Construction | 2024 |
| Wind Estate (UK) Limited | Energy | 2016 |
| Wind Estate (UK) Management Ltd | Administrative & support | 2025 |
| Wind Estate (UK) Wind Farms Ltd | Administrative & support | 2025 |
| Windcarr Motor Coaches Ltd | Transport & logistics | 2025 |
| Winding Tech Limited | Professional & scientific | 2002 |
| Winding Technology Limited | Manufacturing | 1988 |
| Window Control Systems UK Limited | Construction | 2017 |
| Window Repair Yorkshire Ltd | Construction | 2026 |
| Windybank FLY Fishing Club Limited | Arts & recreation | 1993 |
| Windyedge Green Limited | Agriculture & fishing | 2021 |
| Wine Tavern Farm Ltd | Wholesale & retail | 2020 |
| Wing Property Group Limited | Real estate | 2023 |
| Wing YIU Limited | Hospitality | 2017 |
| Wingail Properties Limited | Hospitality | 2003 |
| Winprop 1 Limited | Construction | 2020 |
| Winter & Co. Hair Salon Limited | Other services | 2024 |
| Winter Bear Holdings Ltd | Real estate | 2023 |
| Winteringham GAS Services Ltd | Construction | 2020 |
| Winton Property Management Limited | Extraterritorial | 2020 |
| Wira Instrumentation Limited | Manufacturing | 1997 |
| Wise Minded Wellbeing CIC | Health & social care | 2021 |
| Wised Ltd | Arts & recreation | 2025 |
| Wish Xperts Solutions Limited | Information & communication | 2025 |
| With Rachael Ltd | Professional & scientific | 2024 |
| WITHTHE8S Ltd | Arts & recreation | 2024 |
| Wittygeeks Ltd | Professional & scientific | 2026 |
| Wizard Messaging Group Limited | Information & communication | 2024 |
| WLC Training Ltd | Education | 2018 |
| WLF (Management) Limited | Other services | 2004 |
| Wmrh Holdings Limited | Financial services | 2025 |