| WAK Autos Limited | Professional & scientific | 2023 |
| WAK Developers Limited | Real estate | 2024 |
| Wake Bakes Ltd | Hospitality | 2025 |
| Walcott Law Ltd | Professional & scientific | 2026 |
| Wald & Saunders Legacy Holdings Ltd | Real estate | 2025 |
| Waldon Homes Ltd | Real estate | 2021 |
| Waleed & Co Accountants Ltd | Professional & scientific | 2024 |
| Waleeullah Ltd | Health & social care | 2025 |
| Wali Express Limited | Transport & logistics | 2018 |
| Walia Associates Limited | Information & communication | 2015 |
| Walk in the Light Ltd | Agriculture & fishing | 2018 |
| Wall Art Pro Limited | Wholesale & retail | 2021 |
| Wall Done Builder Ltd | Construction | 2018 |
| Wallace Anthony Contracts Ltd | Construction | 2023 |
| Wallace Anthony Ltd | Construction | 2014 |
| Wallaroy Group Ltd | Wholesale & retail | 2025 |
| Wallbridge Lewis Limited | Real estate | 2023 |
| Wallbrook Ltd | Construction | 2015 |
| Waller Avenue Motors Limited | Wholesale & retail | 2023 |
| Wallman Pubs Limited | Real estate | 2009 |
| Walls Specialists Ltd | Construction | 2016 |
| Wally Variety Store Ltd | Wholesale & retail | 2025 |
| Walnut Grove (Dunstable) Management Company Limited | Households | 2014 |
| Walsh Homes Limited | Construction | 2023 |
| Walsh Management Limited | Construction | 2026 |
| Walsh Property Services Limited | Professional & scientific | 2015 |
| Waltham Property Management Ltd | Households | 2021 |
| Walus Cars Ltd | Manufacturing | 2015 |
| Wamaza Limited | Transport & logistics | 2024 |
| Wamin Tech Ltd | Information & communication | 2018 |
| WAN Xiang Ltd | Hospitality | 2021 |
| Wananchi Hammersmith UK Ltd | Manufacturing | 2026 |
| Wananchi Perfumes Limited | Wholesale & retail | 2025 |
| Wanhar Limited | Wholesale & retail | 2025 |
| Wannacall Ltd | Extraterritorial | 2021 |
| Wansel Ltd | Extraterritorial | 2025 |
| Waqar Contractors Ltd | Construction | 2023 |
| Waqar Malik Limited | Wholesale & retail | 2020 |
| WAR Games 1983 Limited | Professional & scientific | 2025 |
| Warbury Fencing Ltd | Construction | 2020 |
| Ward & Lovell Estates Limited | | 1984 |
| Ward Leisure Homes Ltd | Real estate | 2021 |
| Ward Therapies Guru Ltd | Health & social care | 2025 |
| Ward Therapies Limited | Other services | 2022 |
| Warden Biomedia Limited | Extraterritorial | 2024 |
| Warden Domestics Limited | Wholesale & retail | 2003 |
| Warden Hill Chemist Limited | Wholesale & retail | 1999 |
| Warden Hill Pharma Ltd | Wholesale & retail | 2024 |
| Warden Hill Transport Limited | Transport & logistics | 2015 |
| Warden Plastics Limited | Manufacturing | 1957 |
| Wardenhill Couriers Ltd | Transport & logistics | 2022 |
| Wardorf Studios Ltd | Professional & scientific | 2013 |
| Wardown 212 Limited | Real estate | 2024 |
| Wardown Accountancy Ltd | Professional & scientific | 2024 |
| Wardown Consultancy Ltd | Professional & scientific | 2024 |
| Wardown Court Residents Association Limited | Households | 1987 |
| Wardown Investments Ltd | Real estate | 2025 |
| Wardown Properties 25 Limited | Real estate | 2025 |
| Wardown Properties Limited | Real estate | 2015 |
| Warm Homes Grant Ltd | Construction | 2025 |
| Warm Start Heating & Solutions Ltd | Construction | 2020 |
| Warren Financial Ltd | Information & communication | 2018 |
| Warriach Hassan Ltd | Transport & logistics | 2025 |
| Warsa Ltd | Real estate | 2026 |
| Warszawa Polski Sklep Ltd | Wholesale & retail | 2025 |
| WAS & Sam's Ltd | Real estate | 2024 |
| Waste Busterz Ltd | Water & waste | 2023 |
| Waste Busterz Solutions Ltd | Water & waste | 2023 |
| Watchops Ltd | Wholesale & retail | 2025 |
| Water Rock Ltd | Financial services | 2024 |
| Waterhouse Gardens Management Company Limited | Real estate | 2004 |
| Waterineye Ltd | Wholesale & retail | 2026 |
| Waterjet Training Limited | Education | 2019 |
| Waters Properties & Holdings Ltd | Real estate | 2023 |
| Waterside HUT Ltd | Wholesale & retail | 2013 |
| Waterville Lodge RTM Company Limited | Real estate | 2004 |
| Waterway Estates Limited | Construction | 2002 |
| Watford MAK Ltd | Hospitality | 2023 |
| Watkins Project Services Ltd | Professional & scientific | 2019 |
| Watling Court Dunstable Limited | Households | 1997 |
| Watling Investments Limited | Real estate | 2021 |
| Watney Wimpy Ltd | Hospitality | 2022 |
| Wattsdown Developments Limited | Real estate | 1998 |
| Wattsdown Limited | Real estate | 1978 |
| Wattsepp Innovation Ltd | Manufacturing | 2020 |
| Wave & Vector Ltd | Wholesale & retail | 2025 |
| Wave Conquest Forwarders Limited | Transport & logistics | 2009 |
| Wavesight Holdings Limited | Financial services | 2014 |
| Wawa Wings Kentish Ltd | Hospitality | 2025 |
| WAX Scentz Ltd | Wholesale & retail | 2023 |
| Waxgone Ltd | Health & social care | 2023 |
| Way to the Nations Ltd. | Health & social care | 2011 |
| WAY2DESTINATION Ltd | Construction | 2021 |
| WAY2GLAMOR Ltd | Other services | 2024 |
| WAY2NEWS Ltd | Information & communication | 2025 |
| Waymark Motors Limited | Extraterritorial | 2024 |
| Wayne Enterprises (London) Ltd | Transport & logistics | 2021 |
| Wayne Terrelonge Ltd | Professional & scientific | 2025 |
| Wayside Healthcare Holdings Limited | Financial services | 2024 |
| Wayside Healthcare Ltd | Health & social care | 2014 |