| Windows 4 Less Ltd | Construction | 2014 |
| Windows for Children Limited | Hospitality | 2010 |
| Windows Washed Limited | Administrative & support | 2024 |
| Wing Surf Ltd | Education | 2020 |
| Wing Surf School Ltd | Education | 2021 |
| Wingate Court Management Limited | Households | 1999 |
| Winn Lottery Ltd | Information & communication | 2025 |
| Winslade House Management Company Limited | Households | 1987 |
| Winston's Properties Ltd | Real estate | 2025 |
| Wintemple Limited | Real estate | 2016 |
| Winter Construction & Landscapes Ltd | Administrative & support | 2021 |
| Winter Construction Ltd | Construction | 2021 |
| Winterwood Farms Ltd | Agriculture & fishing | 2000 |
| Winterwood Holdings Limited | Extraterritorial | 2015 |
| Wintex International Limited | Administrative & support | 2018 |
| Winview Fabrications Limited | Agriculture & fishing | 2004 |
| Wireless Audio Processing Ltd | Information & communication | 2025 |
| Wisdom Building Services Ltd | Construction | 2024 |
| Wise OWL Cider(Kent) Ltd | Manufacturing | 2022 |
| Wisepress Limited | Administrative & support | 1982 |
| Witchywise Ltd | Wholesale & retail | 2025 |
| Withu International Limited | Financial services | 2022 |
| Withu Travel Limited | Information & communication | 2024 |
| Wizejacks Limited | Hospitality | 2024 |
| WJR Engineering Consultants Limited | Professional & scientific | 2010 |
| WL Groundwork and Landscaping Ltd | Administrative & support | 2025 |
| WM 0312 Limited | Extraterritorial | 2012 |
| Wodonga Properties Ltd | Real estate | 2024 |
| Wokes Trading Ltd | Extraterritorial | 2021 |
| Wolfcoast Ltd | Wholesale & retail | 2020 |
| Wolfgang Investments Limited | Professional & scientific | 2021 |
| Wolseley Event Consultancy Ltd | Administrative & support | 2020 |
| Wolverdene Limited | Households | 2014 |
| Women in the Food Industry C.I.C. | Administrative & support | 2019 |
| Women of the Year | Other services | 1998 |
| Womens' International Shipping and Trading Association Limited | Other services | 2005 |
| Wonder Roses Ltd | Professional & scientific | 2019 |
| Wonderful Gift Limited | Health & social care | 2014 |
| Wonderful Properties Limited | Real estate | 2015 |
| Wonky Dubs 1979 Ltd | Wholesale & retail | 2023 |
| Wooba Limited | Wholesale & retail | 2024 |
| Wood Developments Limited | Construction | 2023 |
| Woodchurch Plumbing & Heating Ltd | Construction | 2017 |
| Woodford Town FC Academy Ltd | Arts & recreation | 2020 |
| Woodford Town Football Club Limited | Arts & recreation | 2015 |
| Woodham Carpentry Limited | Construction | 2019 |
| Woodland Consultancy Limited | Construction | 2016 |
| Woodland Plant Hire Limited | Other services | 2021 |
| Woodlands Consultancy Services Ltd | Professional & scientific | 2019 |
| Woodlands Interim Services Limited | Manufacturing | 2014 |
| Woodley Construction Limited | Construction | 2023 |
| Woodlouse Films Ltd | Arts & recreation | 2014 |
| Woodman Bros Ltd | Construction | 2016 |
| Woods Independent Real Estate Limited | Real estate | 2023 |
| Woodside Carpentry Limited | Construction | 2021 |
| Woodstock House Day Nursery Limited | Education | 2017 |
| Woody Prints Ltd | Manufacturing | 2025 |
| Wooj Property Limited | Real estate | 2024 |
| Woolly Felters Limited | Arts & recreation | 2014 |
| Workagile Ltd | Extraterritorial | 2020 |
| Workbuzz Analytics Ltd | Wholesale & retail | 2011 |
| Worker BEE Landscaping Ltd | Administrative & support | 2022 |
| Worker BEE Property Developments Ltd | Construction | 2022 |
| Workhorse Media Limited | Information & communication | 2015 |
| Workshop 2.0 Ltd | Wholesale & retail | 2022 |
| Workwear Kent Ltd | Manufacturing | 2024 |
| World Newah Organization UK Ltd | Education | 2024 |
| World Tractors Limited | Wholesale & retail | 2018 |
| Worldwide Facilitators Ltd | Administrative & support | 2025 |
| Worldwide Fresh Logistics Limited | Transport & logistics | 2025 |
| Worldwide Partnerships Limited | Administrative & support | 2016 |
| Worldwind Music Group Limited | Other services | 2007 |
| Worldwind Music Limited | Manufacturing | 1986 |
| Worldwind Music Retail Limited | Other services | 2014 |
| Wormald - Accountants Limited | Professional & scientific | 2003 |
| Wormald Properties Limited | Real estate | 2017 |
| Worship.Works | Education | 2005 |
| Worthing Pharmacies Limited | Wholesale & retail | 2011 |
| Worton Projects Limited | Real estate | 2021 |
| Worzelgambino Ltd | Transport & logistics | 2023 |
| Wozza Coffee Ltd | Hospitality | 2025 |
| WP Engineering Consulting Ltd | Professional & scientific | 2022 |
| WPR Management Company Limited | Households | 2001 |
| Wrans Limited | Information & communication | 2012 |
| Wrapguysuk Ltd | Manufacturing | 2025 |
| WRD Developments Ltd | Construction | 2025 |
| Wrenworks Ltd | Construction | 2022 |
| Wright Health and Safety Services Limited | Professional & scientific | 2023 |
| Wright Mews Management Ltd | Real estate | 2017 |
| Wright Property Investment Limited | Real estate | 2016 |
| Wrighteous Solutions Ltd | Information & communication | 2013 |
| Wrights Landscapes Group Ltd | Administrative & support | 2016 |
| Wrinkle Boss Limited | Other services | 2024 |
| WRITE2TALK Ltd | Health & social care | 2022 |
| WS Projects Group Limited | Construction | 2024 |
| WSK Ltd | Transport & logistics | 2018 |
| WTS Eurotrade Ltd | Information & communication | 2020 |
| Wunmoore Limited | Construction | 2013 |
| Wurx Music Limited | Administrative & support | 2024 |
| Wwii Logistics Ltd | Transport & logistics | 2019 |