| West Mead Projects Limited | Construction | 2016 |
| West Street Pizza Sittingbourne Ltd | Hospitality | 2025 |
| Westbere Green Space Protection Limited | Administrative & support | 2014 |
| Westfield Housing Limited | Construction | 2022 |
| Westow Hill Properties Limited | Real estate | 2006 |
| Westow View Ltd | Financial services | 2020 |
| WFK (Kent) Ltd | Health & social care | 2018 |
| WG Motorworks Ltd | Manufacturing | 2015 |
| WG Property Development Ltd | Real estate | 2015 |
| Wheel Class Ltd | Wholesale & retail | 2021 |
| Whitcroft & Kingston Limited | Other services | 1990 |
| White Prism Consulting & Services Ltd | Information & communication | 2015 |
| White Property Solutions UK Ltd | Real estate | 2025 |
| Whitehall Gore Ltd | Real estate | 2019 |
| Whitehouse Homes Limited | Real estate | 2016 |
| Whiteleaf Equestrian & Agricultural Centres Community Interest Company | Agriculture & fishing | 2011 |
| Whitelogisitcs Limited | Transport & logistics | 2025 |
| Whiteslogistics Limited | Transport & logistics | 2025 |
| Whitstable Boat Tours Ltd | Transport & logistics | 2022 |
| Whitstable Boat Trips Ltd | Transport & logistics | 2022 |
| Whitstabubbles Day Nursery Limited | Education | 2017 |
| Wholistic Care Ltd | Health & social care | 2018 |
| WHP Building Contractors Ltd | Construction | 2022 |
| Wikea Limited | Manufacturing | 2020 |
| Wildex Limited | Manufacturing | 1962 |
| Wildwinds Antiques Emporium Ltd | Wholesale & retail | 2025 |
| Wilkinson Ltd | Manufacturing | 1991 |
| Will Barnes Recruitment Limited | Transport & logistics | 2023 |
| Will Stevens Home Improvements Ltd | Real estate | 2023 |
| William Mark Holdings Limited | Real estate | 1962 |
| William Whitmey Independent Funeral Directors (Teynham) Limited | Other services | 2019 |
| William Whitmey Independent Funeral Directors Limited | Other services | 2013 |
| Williams & Partners Properties Limited | Real estate | 2022 |
| Willis & Carr Holdings Limited | Manufacturing | 2025 |
| Willis Properties (Kent) Limited | Real estate | 2020 |
| Willmachi Limited | Information & communication | 2022 |
| Willow Bushcraft CIC | Education | 2019 |
| Wills Brothers Roofing Limited | Construction | 2019 |
| Wilson Commercial Ltd | Real estate | 2021 |
| Wilson Electrical Services Holdings Ltd | Extraterritorial | 2019 |
| Wingham Electrical, Design & Fire Ltd | Other services | 2024 |
| Wingham Wildlife Park (2008) Limited | Arts & recreation | 2007 |
| Wingham Wildlife Park Animal Welfare Limited | Arts & recreation | 2015 |
| Wings Nursery Limited | Education | 2016 |
| Wire Belt Company Limited | Manufacturing | 1962 |
| Wisemans Antiques Ltd | Wholesale & retail | 2020 |
| WJR Plumbing & Heating Ltd | Construction | 2025 |
| WNT Consulting Ltd | Other services | 2020 |
| Wolf Evolution Limited | Professional & scientific | 2025 |
| Wonderskin Europe Ltd | Wholesale & retail | 2021 |
| Wooburn Bedding Limited | Manufacturing | 2025 |
| Woodcroft Search Group Limited | Administrative & support | 2025 |
| Woodcross Energy Limited | Professional & scientific | 2024 |
| Woodgate Close Residents' Management Company Limited | Households | 2018 |
| Woodland Surgery Limited | Health & social care | 2023 |
| Woodpecker Holdings Limited | Real estate | 2020 |
| Woodsell Limited | Arts & recreation | 1984 |
| Woodstock Fire and Rescue Ltd | Public administration | 2021 |
| Woodstreet BID Solutions Limited | Professional & scientific | 2016 |
| Woosehill Medical Services Limited | Health & social care | 2022 |
| Wordyhub LLP | | 2015 |
| Working Relations Ltd | Professional & scientific | 2013 |
| World Church of Messiah UK | Other services | 2005 |
| World Gym Challenge . COM Limited | Information & communication | 2006 |
| World VENTIL8 Day CIC | Education | 2026 |
| Wornuk Ltd | Wholesale & retail | 2025 |
| Worth-It Solutions Limited | Information & communication | 2016 |
| Wpgj Software Solutions Ltd | Information & communication | 2024 |
| WPH Limited | Construction | 1994 |
| WRC (Kent) Limited | Wholesale & retail | 2016 |
| Wrinsted Lodge Consulting Limited | Professional & scientific | 2014 |
| Wshelton Limited | Wholesale & retail | 2024 |
| WT Renewables Ltd | Construction | 2023 |
| WTM Bespoke Ltd | Manufacturing | 2020 |
| Wunmziecakes Ltd | Wholesale & retail | 2021 |
| X Insulation Ltd | Construction | 2025 |
| X-Magic Transport Limited | Transport & logistics | 2020 |
| Xandru Limited | Transport & logistics | 2015 |
| Xcel 2000 Fostercare Services Limited | Health & social care | 2000 |
| XDX Performance Ltd | Wholesale & retail | 2026 |
| Xeinadin South East Limited | Professional & scientific | 2018 |
| Xela Group Holdings Ltd | Financial services | 2025 |
| Xenodata Limited | Information & communication | 1985 |
| XL Telecom Inc Limited | Information & communication | 2011 |
| XO Investment Partners Limited | Financial services | 2022 |
| Xstal Consulting Limited | Information & communication | 2008 |
| Y Douglas-Watson Ltd | Health & social care | 2019 |
| Yadhav Ltd | Real estate | 2024 |
| Yamak Ltd | Health & social care | 2023 |
| Yellow BEE Kent Limited | Hospitality | 2023 |
| Yemkosh (UK) Limited | Health & social care | 2008 |
| Yiannis Doors Limited | Manufacturing | 2000 |
| YNX Properties Ltd | Real estate | 2025 |
| Yoal Group Ltd | Wholesale & retail | 2021 |
| Yodx Fulfilment and Logistics Ltd | Administrative & support | 2024 |
| Yokes Court Consultancy Limited | Financial services | 2017 |
| Yoshimi Oral Care Ltd | Health & social care | 2025 |
| Youngs Decor & Maintenance Ltd | Construction | 2012 |
| Your Building Needs Ltd | Construction | 2026 |
| Yummy Yummy Ltd | Hospitality | 2016 |