| Walthamstow Limited | Other services | 2022 |
| Walthamstow Motors Limited | Wholesale & retail | 2025 |
| Walton Beach Holiday Lets Ltd | Real estate | 2023 |
| Walton House Nursery Limited | Health & social care | 2011 |
| WAN Corporation Ltd | Health & social care | 2021 |
| Wan-Life Foundation | Wholesale & retail | 2020 |
| Wander & Weave Ltd | Wholesale & retail | 2025 |
| Wander Grill Ltd | Hospitality | 2025 |
| Wanghongyou Technology Co., Limited | Wholesale & retail | 2025 |
| Wani-Bizz Healthcare Ltd | Health & social care | 2025 |
| Wannock Ltd | Real estate | 2015 |
| Wanstead Coffee Shop Ltd | Hospitality | 2023 |
| Wanstead Hotel Limited | Hospitality | 2019 |
| Wanstead Investments Limited | Real estate | 2006 |
| Wanstead Pharma Limited | Wholesale & retail | 2022 |
| Wapping Consultants Ltd | Professional & scientific | 2016 |
| Waqar Construction Limited | Construction | 1997 |
| Waqas Autos Limited | Wholesale & retail | 2014 |
| Waqas Sharif Ltd | Wholesale & retail | 2026 |
| Warbridge Limited | Extraterritorial | 2014 |
| Ward Security Services Ltd | Administrative & support | 2018 |
| Warden Security & Facilities Management Ltd | Administrative & support | 2026 |
| Wardrobe Village Ltd | Wholesale & retail | 1999 |
| Wards Ventures Ltd | Real estate | 2024 |
| Warehouse 16 Ltd | Wholesale & retail | 2025 |
| Warehouse 18 Ltd | Wholesale & retail | 2025 |
| Warehouse Services & Solutions Limited | Water & waste | 2023 |
| Wari Restaurants Ltd | Hospitality | 2026 |
| Warley Food & Wine Limited | Wholesale & retail | 2015 |
| Warmbrit Energy Ltd | Construction | 2025 |
| Warmpulse Care Limited | Administrative & support | 2025 |
| Warranty Direct Limited | Financial services | 2023 |
| Warren Autocentre Limited | Manufacturing | 2018 |
| Warrens Gym Limited | Administrative & support | 2016 |
| Wartaj Ltd | Wholesale & retail | 2022 |
| Warwick Estate Investment Limited | Real estate | 2001 |
| Waseem Shopiq Ltd | Wholesale & retail | 2025 |
| Washington Road Management Limited | Real estate | 1988 |
| Wasim’S Properties Ltd | Real estate | 2023 |
| Wasiu AK Ltd | Construction | 2018 |
| Wasqaa Tiling Limited | Construction | 2014 |
| Waste Central Ltd | Water & waste | 2026 |
| Waste Collection Management Ltd | Water & waste | 2026 |
| Waste Rescuers Ltd | Transport & logistics | 2025 |
| Wasteman Services Ltd | Water & waste | 2023 |
| Wastemove Limited | Transport & logistics | 2020 |
| Wastend Ltd | Transport & logistics | 2020 |
| Watan Construction & Renovation Ltd | Construction | 2025 |
| Watan Ilford Ltd | Hospitality | 2019 |
| Watchpassport Limited | Information & communication | 2023 |
| Water Monitoring Ltd | Other services | 2011 |
| Waterlily Living Ltd | Wholesale & retail | 2025 |
| Waterr Solutionss Ltd | Water & waste | 2025 |
| Waters Clothing Limited | Wholesale & retail | 2017 |
| Watershed Healthcare Services Limited | Health & social care | 2024 |
| Watford Coffee House Limited | Hospitality | 2026 |
| Watnow?! TV Ltd | Information & communication | 2015 |
| Wattflow CP Systems Ltd | Construction | 2025 |
| Watthall Scaffolding Limited | Construction | 2019 |
| Watto Properties Ltd | Real estate | 2025 |
| Wattofy Ltd | Wholesale & retail | 2026 |
| Watts Estates Ltd | Real estate | 2016 |
| WAV World Studios Ltd | Administrative & support | 2024 |
| Wave Property Limited | Real estate | 2023 |
| Waverley Interiors Limited | Construction | 1998 |
| WAX and Shine Car Services Ltd | Wholesale & retail | 2025 |
| Waylands Developments Ltd | Real estate | 2022 |
| Waylands FH Ltd | Real estate | 2022 |
| Waynes Coffee Ilford Ltd | Hospitality | 2017 |
| Waynes Coffee Kensington Ltd | Hospitality | 2017 |
| Waypower Limited | Wholesale & retail | 2008 |
| Wayz London Limited | Wholesale & retail | 2023 |
| WAZ247 Ltd | Construction | 2024 |
| Wazii Ltd | Wholesale & retail | 2025 |
| Wazir Resorts Ltd | Extraterritorial | 2023 |
| Wazship Ltd | Wholesale & retail | 2025 |
| Wazu Venture Ltd | Real estate | 2017 |
| WCC Limited | Hospitality | 2025 |
| WD Residential Ltd | Real estate | 2020 |
| Wdan Ltd | Manufacturing | 2024 |
| WE ALL Love Fings Ltd | Professional & scientific | 2025 |
| WE ARE Everywhere Limited | Professional & scientific | 2025 |
| WE ARE Meraki CIC | Health & social care | 2026 |
| WE ARE Signlab UK Ltd | Manufacturing | 2025 |
| WE Buy Gadgets Barkingside T/A Gadget Exchange Limited | Wholesale & retail | 2013 |
| WE CAN Change Life Ltd | Other services | 2021 |
| WE Compare Parking Ltd | Transport & logistics | 2026 |
| WE Digital Media Ltd | Information & communication | 2023 |
| WE Dispose Ltd | Water & waste | 2026 |
| WE FIX ANY Car Ltd | Wholesale & retail | 1997 |
| WE FIX Autos Ltd | Wholesale & retail | 2025 |
| WE FIX Glazing Ltd | Manufacturing | 2013 |
| WE FIX Screen Ltd | Administrative & support | 2014 |
| WE Know Business Limited | Construction | 2012 |
| WE LET Estates Ltd | Real estate | 2016 |
| WE Rent Vans Ltd | Administrative & support | 2025 |
| WE Xibit Limited | Other services | 2018 |
| We'Fix Autocentres Ltd | Wholesale & retail | 2020 |
| WE5 Limited | Information & communication | 2018 |
| Weal Path Ltd | Administrative & support | 2020 |