| Wellbrook Properties Limited | Other services | 1999 |
| Welles Management Limited | Real estate | 2022 |
| Wellie Dogs Limited | Other services | 2025 |
| Wellness & Beauty for ALL C.I.C. | Administrative & support | 2018 |
| Wellness 22 Limited | Other services | 2025 |
| Wellness Beyond UK Limited | Wholesale & retail | 2026 |
| Wells Engineering Design Limited | Administrative & support | 2008 |
| Wellsite Engineering Services Limited | Professional & scientific | 2019 |
| Wellstone Care & Recruitment Ltd | Health & social care | 2025 |
| Wellworks U.K Limited | Extraterritorial | 2023 |
| Wendi Cochrane Consultancy Limited | Administrative & support | 2023 |
| Wendy Rydzkowski Psychology Ltd | Education | 2025 |
| Wendy’S Kitchen Ltd | Other services | 2024 |
| Werfen Limited | Manufacturing | 1972 |
| Wernham Property Holdings Limited | Real estate | 2026 |
| Wesson Limited | Administrative & support | 2025 |
| West + Fenton Consultancy Limited | Professional & scientific | 2017 |
| West Coast Composites NW Ltd | Manufacturing | 2025 |
| West Consultancy Services Ltd | Administrative & support | 2025 |
| West Green Surveying Ltd | Other services | 2021 |
| West Lancs Electrical Ltd | Administrative & support | 2013 |
| West Lynne Technology Services Ltd | Professional & scientific | 2023 |
| West Ridings Racing Legends Ltd | Professional & scientific | 2025 |
| Westbrook Bedrooms Ltd | Construction | 2025 |
| Westbrook Carpets & Laminates Limited | Wholesale & retail | 2008 |
| Westbrook Library Friends C.I.C. | Arts & recreation | 2025 |
| Westbrook Veterinary Centre Limited | Professional & scientific | 2022 |
| Westbrook Welding Alloys Limited | Wholesale & retail | 1993 |
| Westcott Care Holdings Limited | Financial services | 2019 |
| Westcott Care Limited | Health & social care | 2018 |
| Westcott Management Services Limited | Administrative & support | 2007 |
| Western Marine Services Ltd | Administrative & support | 2025 |
| Westferry Engineering Limited | Other services | 2018 |
| Westfield Plastering and Drylining Limited | Construction | 2023 |
| Westgate Project Consultancy Limited | Information & communication | 2015 |
| Westgrove Group (Holdings) Limited | Professional & scientific | 2014 |
| Westgrove Support Services Limited | Administrative & support | 2014 |
| Westgrove Technical Services Ltd | Professional & scientific | 2021 |
| Westhawk Limited | Information & communication | 1983 |
| Westlake Management Consultants Limited | Professional & scientific | 2005 |
| Westminster Park Management Company (NO.2) Limited | Real estate | 2002 |
| Westnewton Windfarm Limited | Energy | 2013 |
| Westonburttraining Ltd | Administrative & support | 2024 |
| Westwood Performance Cars Limited | Wholesale & retail | 2020 |
| WET & JET Ltd | Administrative & support | 2018 |
| WFA Holdco 123 Limited | Financial services | 2024 |
| WFC Contracting Limited | Construction | 2021 |
| WG Moto Limited | Administrative & support | 2016 |
| Wgmg Holdings Ltd | Construction | 2020 |
| WGMMX10 Ltd | Real estate | 2019 |
| Whall Technologies Ltd | Information & communication | 2022 |
| Wham Cottage Investments Limited | Real estate | 2022 |
| Wharfepoint Limited | Administrative & support | 2026 |
| What Limit Ltd | Manufacturing | 2025 |
| What Matters Media Ltd | Professional & scientific | 2023 |
| What Next Consultancy (UK) Limited | Professional & scientific | 2013 |
| What's Next People and Strategy Consultancy Ltd | Other services | 2018 |
| Whatif Group Limited | Professional & scientific | 2021 |
| Whatology Limited | Administrative & support | 2023 |
| Whats Loved Limited | Wholesale & retail | 2015 |
| Whatton & Stirling Property Solutions Limited | Real estate | 2020 |
| Whcobts Limited | Financial services | 2019 |
| Wheatacre Group Holdings Limited | Financial services | 2020 |
| Wheeldon Auto Services Ltd | Wholesale & retail | 2025 |
| Wheeldon Consultancy Limited | Professional & scientific | 2011 |
| Wheelsmart Powder Coating Ltd | Wholesale & retail | 2018 |
| Wheldon Haulage Limited | Transport & logistics | 2015 |
| Where ARE the Women Artists CIC | Arts & recreation | 2021 |
| Wheresthematch Limited | Information & communication | 2008 |
| Whinfell Management Limited | Wholesale & retail | 2013 |
| Whiskey Jack Developments Limited | Real estate | 2005 |
| Whistler Bidco Limited | Financial services | 2018 |
| Whistler Midco Limited | Financial services | 2018 |
| Whistler Topco Limited | Financial services | 2018 |
| Whitby Retail Ltd | Wholesale & retail | 2025 |
| White Apron Ltd | Administrative & support | 2026 |
| White Hall Stud and Livery Stables LLP | | 2022 |
| White Lace Bakery Ltd | Wholesale & retail | 2021 |
| White Nile Ltd | Professional & scientific | 2022 |
| White Owls Logistics Limited | Transport & logistics | 2018 |
| White Paper Properties Ltd | Real estate | 2022 |
| White Peak Developments Limited | Real estate | 2023 |
| White Raven Resourcing Ltd | Administrative & support | 2024 |
| White River Retreats Ltd | Hospitality | 2025 |
| White Rose Lettings Limited | Real estate | 2012 |
| Whitecross Building Services Ltd | Construction | 2022 |
| Whitecross Electrical Services Ltd | Construction | 2022 |
| Whitecross Logistics Ltd | Transport & logistics | 2025 |
| Whitehead Design Engineering Limited | Administrative & support | 2008 |
| Whitehead Investment Company Ltd | Real estate | 2025 |
| Whitehead Links Limited | Professional & scientific | 2018 |
| Whitehill Consulting Services Limited | Information & communication | 2016 |
| Whitehouse Gates & Fencing Ltd | Construction | 2023 |
| Whites Fasteners Ltd | Wholesale & retail | 2009 |
| Whitesands Advisory Limited | Administrative & support | 2025 |
| Whiteview Limited | Information & communication | 2015 |
| Whitfield Interiors Ltd | Construction | 2021 |
| Whitford Paediatric Locums Limited | Health & social care | 2025 |
| Whiting Estates Limited | Real estate | 2025 |
| Whittaker B.I Limited | Administrative & support | 2019 |