| W Jarvis & SON Tree Services & Landscapes Ltd | Administrative & support | 2025 |
| W Marrison Builders Limited | Construction | 2008 |
| W P Harris Plumbing & Heating Services Limited | Construction | 2021 |
| W+S Electrics Ltd | Construction | 2006 |
| W.A Watts Automotive Ltd | Wholesale & retail | 2025 |
| W.Grabowski Limited | Health & social care | 2009 |
| W.J. Baker (Property Management) Limited | Real estate | 1963 |
| W.J. Newton Property Maintenance Ltd | Construction | 2012 |
| W.J.Baker(Land Holdings)Limited | Extraterritorial | 1957 |
| W.J.S.T Limited | Wholesale & retail | 2025 |
| W8 Distribution Ltd | Wholesale & retail | 2022 |
| W8 Products Ltd | Wholesale & retail | 2022 |
| Waavee Ltd | Hospitality | 2024 |
| Wadadli Moss Limited | Health & social care | 2020 |
| Waddington Brown Holdings Limited | Financial services | 2022 |
| Wade Data Labs Limited | Wholesale & retail | 2026 |
| Wade Decorators Ltd. | Construction | 2018 |
| Wadran Industrial Ltd | Information & communication | 2026 |
| Wadud Ltd | Wholesale & retail | 2018 |
| Waendel Management Company Limited | Households | 2021 |
| Waffles N' Jerk Ltd | Hospitality | 2018 |
| Wagdi Ltd | Professional & scientific | 2026 |
| Wags Empawrium Limited | Wholesale & retail | 2019 |
| Wagstaff & Walter Limited | Real estate | 2016 |
| Wagtail Yard Limited | Extraterritorial | 2018 |
| Wahaballa Diagnostics Ltd | Administrative & support | 2022 |
| Wahdah Ventures Ltd | Wholesale & retail | 2023 |
| Wakeham Investment Group Ltd | Financial services | 2025 |
| Waku Studios Ltd | Information & communication | 2021 |
| Walk Your Way Limited | Administrative & support | 2025 |
| Walk-A-Cise Ltd | Information & communication | 2021 |
| Walker ROE Developments Ltd | Real estate | 2024 |
| Wallace Daniels Limited | Agriculture & fishing | 2008 |
| Wallwork Project Management Services Limited | Professional & scientific | 2018 |
| Walsham Construction Services Limited | Wholesale & retail | 2020 |
| Walter & Capital Partners LLP | | 2017 |
| Wangjiongtrade Ltd | Wholesale & retail | 2026 |
| Wanigema Ltd | Professional & scientific | 2012 |
| Want That Social Ltd | Extraterritorial | 2025 |
| Wanted IT Group CIC | Other services | 2025 |
| Waran Sourcing Ltd | Administrative & support | 2025 |
| Ward Ambrose Limited | Professional & scientific | 2014 |
| Warda Foods Ltd | Hospitality | 2026 |
| Wards Prestige Ltd | Wholesale & retail | 2024 |
| Warm Baby Project CIC | Other services | 2022 |
| Warm Haven Estates Ltd | Real estate | 2024 |
| Warm Home Innovations Limited | Construction | 2025 |
| Warne Haulage Ltd | Transport & logistics | 2016 |
| Warner Health Informatics Limited | Information & communication | 2023 |
| Warren Healthcare Ltd | Health & social care | 2026 |
| Warren Homecare Ltd | Health & social care | 2021 |
| Warrior Sound Ltd | Information & communication | 2026 |
| Warwick Administration Services Limited | Administrative & support | 2025 |
| Warwick Marketing Limited | Wholesale & retail | 2025 |
| Wase Homes LEE Lane Ltd | Construction | 2021 |
| Wase Homes Limited | Construction | 2021 |
| Wash 2015 Limited | Administrative & support | 2015 |
| Wash Group Limited | Administrative & support | 2023 |
| Waspe & Co Limited | Construction | 2023 |
| Waste NOT Crew Community Interest Company | Administrative & support | 2026 |
| Waterfalls Estate (Management) Ltd | Real estate | 2015 |
| Waterfalls Food & Beverage Trading Ltd | Wholesale & retail | 2019 |
| Waterfalls Hospitality Consultants Ltd | Professional & scientific | 2019 |
| Waterloo Trading Ltd | Transport & logistics | 2013 |
| Waters Consultancy Ltd | Information & communication | 2026 |
| Waters Holdings Ltd | Wholesale & retail | 2018 |
| Watkins Homes Ltd | Real estate | 2025 |
| Watson Barrow Limited | Professional & scientific | 2023 |
| Watson Building & Property Maintenance Ltd | Construction | 2023 |
| Watt Enterprises Ltd | Wholesale & retail | 2024 |
| Watt Mason Limited | Information & communication | 2018 |
| Watts Coatings Ltd | Construction | 2025 |
| Wave Growth Ltd | Information & communication | 2025 |
| Waveora Limited | Information & communication | 2026 |
| WAX 2015 Limited | Administrative & support | 2015 |
| WAX Factory Ltd | Households | 2021 |
| Wayfinder Aviation Ltd | Transport & logistics | 2025 |
| Wayland Systems Ltd. | Professional & scientific | 2016 |
| Wayne Perrin Holdings Limited | Financial services | 2016 |
| Wayne Perrin Limited | Professional & scientific | 2016 |
| WAZ Properties Ltd | Hospitality | 2022 |
| Waze Ltd | Hospitality | 2020 |
| WBS Management Ltd | Professional & scientific | 2025 |
| WC Textiles Ltd | Manufacturing | 2026 |
| WDW Brodie Ltd | Real estate | 2021 |
| WE ARE Sasa Limited | Administrative & support | 2022 |
| WE ARE Think Smart Ltd | Information & communication | 2023 |
| WE Ashwood Property Group Ltd | Financial services | 2025 |
| WE Brand ANY Drink Ltd | Wholesale & retail | 2018 |
| WE CAN Clear IT Ltd | Water & waste | 2019 |
| WE Innovate Ecom Limited | Wholesale & retail | 2025 |
| WE Lead Media Limited | Professional & scientific | 2009 |
| WE Talk of Horses Ltd | Arts & recreation | 2024 |
| Wealth OWL Limited | Information & communication | 2026 |
| Wealth Wellness Limited | Real estate | 2023 |
| Wealthletics Limited | Real estate | 2021 |
| Wealthy Living Ltd | Professional & scientific | 2025 |
| Wear Suvio Ltd | Wholesale & retail | 2026 |
| Weareskky Ltd | Professional & scientific | 2024 |
| Weaver and Wilde Ltd | Hospitality | 2019 |