| Whitewell Consultancy Limited | Professional & scientific | 2017 |
| Whole Structure Systems Ltd | Construction | 2025 |
| WHY IT Works Ltd | Administrative & support | 2025 |
| Whyteleafe Youth FC Ltd | Arts & recreation | 2021 |
| Wick Mobile Tyres Limited | Wholesale & retail | 2025 |
| Wild Rents (LW) Ltd | Real estate | 2016 |
| Wilf Developments (Kent) Limited | Construction | 2026 |
| Wilhelmsen Ships Service Limited | Manufacturing | 1966 |
| Wilks Group Limited | Real estate | 2023 |
| Will Stevens Haulage Limited | Transport & logistics | 2014 |
| William Frost Gardens Limited | Administrative & support | 2015 |
| William Street (PDS HB) Limited | Construction | 2022 |
| Willmove Worldwide Limited | Transport & logistics | 2015 |
| Willoughbys of London Ltd | Hospitality | 2015 |
| Willow & Co Estate Agents Ltd | Real estate | 2025 |
| Willow Aurora Limited | Real estate | 2023 |
| Willow Fields (Dartford) NO. 2 Management Limited | Households | 1990 |
| Willow Fields (Dartford) NO. 3 Management Limited | Households | 1990 |
| Willowpoint Enterprises Limited | Construction | 2003 |
| Wills Motor Services Ltd | Wholesale & retail | 2025 |
| Willsley Ltd | Information & communication | 2020 |
| Wilmington Assets Limited | Real estate | 2016 |
| Wilmington Brick Work Ltd | Construction | 2024 |
| Wilmington Property Group Ltd | Real estate | 2026 |
| Wilson & Sons (GB) Limited | Other services | 2009 |
| Wilson Mendonca Ltd | Real estate | 2024 |
| Wilson's Confectionary Limited | Wholesale & retail | 2025 |
| Wilson's Waste Services Ltd | Water & waste | 2026 |
| Wilsons Engineering Ltd | Construction | 2006 |
| Winchester PUB Co Ltd | Hospitality | 2019 |
| Winchmore Consultancy Services Limited | Information & communication | 2019 |
| Wind Rose Properties LLP | | 2014 |
| Windsor Court (Bickley) Residents Association Limited | Other services | 1987 |
| Wine Holdings (International) Limited | Administrative & support | 2013 |
| Wing Tsun Kent Ltd | Information & communication | 2023 |
| Winovate Ltd | Information & communication | 2024 |
| Winpac Europe Limited | Financial services | 2002 |
| Winslow Advisory Ltd | Other services | 2025 |
| Winston Service Ltd | Wholesale & retail | 2025 |
| Winterbourne Limited | Professional & scientific | 2017 |
| Winton Freeholders Company Ltd | Households | 2018 |
| Wisdom Business Academy Ltd | Education | 2023 |
| Wise Dose Limited | Wholesale & retail | 2023 |
| WIT Education Center Ltd | Education | 2021 |
| Wizmarshall Ltd | Information & communication | 2023 |
| WJ Automation Ltd | Manufacturing | 2021 |
| WJH Electrical Ltd | Construction | 2025 |
| WL Refactory Engineering Ltd | Manufacturing | 2026 |
| WML Holdings Limited | Real estate | 2018 |
| Wolex Unique Business Limited | Administrative & support | 2020 |
| Wolf Electrical Services Ltd | Construction | 2026 |
| Wolf Shock Mitigation Systems Limited | Professional & scientific | 2013 |
| Wonder Elements Limited | Health & social care | 2023 |
| Woodfield Medical Ltd | Health & social care | 2013 |
| Woodhurst Renovations Limited | Construction | 2009 |
| Woodland Paws Dog Grooming Limited | Other services | 2022 |
| Woodlands Europe Limited | Construction | 2021 |
| Woodlands Group Holdings Limited | Financial services | 2017 |
| Woodlands Management Services Limited | Professional & scientific | 2000 |
| Woodlands Site Services Limited | Construction | 1992 |
| Woods & Porter Limited | Wholesale & retail | 2015 |
| Woods&Waters Limited | Arts & recreation | 2022 |
| Wooglobe Ltd | Information & communication | 2017 |
| Woolhouse Place Management Limited | Households | 2015 |
| Woolly HAT Properties Limited | Real estate | 2019 |
| Woolly HAT Property Management LLP | | 2020 |
| Woolwich Kebab Ltd | Hospitality | 2018 |
| Woolwich PUB Company Limited | Hospitality | 2021 |
| Worcester Park (NO.1) Management Company Limited | Households | 1988 |
| Worf Developments Limited | Real estate | 2022 |
| WORKFLOW360 Ltd | Information & communication | 2026 |
| Workforce IT Services Ltd | Information & communication | 2023 |
| Working Connections Ltd | Administrative & support | 2022 |
| Workplane Light Planning Limited | Professional & scientific | 2005 |
| Worksmith London Limited | Manufacturing | 2018 |
| World Blue Travels Limited | Administrative & support | 2024 |
| World Computing Ltd | Information & communication | 2011 |
| World Filming Locations Collective Ltd | Professional & scientific | 2023 |
| World Finance & Accounting Ltd | Financial services | 2026 |
| World Medical City UK Ltd | Financial services | 2018 |
| World Mission Agency - Winners Chapel International | Other services | 2009 |
| World of Aura Ltd | Wholesale & retail | 2025 |
| World Refrigeration Day | Other services | 2019 |
| World Union Martial Arts Federation (Wumf) Ltd | Education | 2020 |
| Worldwide Developerz Ltd | Information & communication | 2024 |
| Worldwide Recruitment Services Limited | Administrative & support | 2007 |
| WOW5 Ltd | Other services | 2021 |
| WP3 CX Limited | Construction | 2025 |
| WP3 Energy Ltd | Professional & scientific | 2021 |
| WP3 Group Ltd | Construction | 2024 |
| WP3 Ltd | Construction | 2020 |
| Wrendles Childcare Limited | Health & social care | 2024 |
| WRH Tech Solutions Ltd | Information & communication | 2017 |
| Wright Crew Events Ltd | Administrative & support | 2026 |
| Wright Dance Community CIC | Arts & recreation | 2023 |
| Wright Dance Ltd | Education | 2023 |
| Wright Theatre LLP | | 2025 |
| Wrights Consulting Ltd | Professional & scientific | 2010 |
| Wrightstone Ltd | Manufacturing | 2013 |
| WS Support Services Ltd | Construction | 2024 |