| Water Works (South East) Ltd | Construction | 2019 |
| Watercress Barns (at Rift Valley Farm) Limited | Hospitality | 2017 |
| Waterline Investments Limited | Real estate | 2025 |
| Waterman Engineering Limited | Professional & scientific | 2018 |
| Waterman Offshore Limited | Construction | 1982 |
| Waterrushplumbing Ltd | Construction | 2025 |
| Watersend Ltd | Real estate | 2019 |
| Waterstone Design Building Services Consultants Limited | Professional & scientific | 2004 |
| Waterstone Environmental Consultants Limited | Professional & scientific | 2016 |
| Watling Street Bean Ltd | Construction | 2020 |
| Watson's Resin Ltd | Construction | 2024 |
| Wattsight Ltd | Construction | 2025 |
| Way Beyond Resin Ltd | Construction | 2019 |
| Wayne Manuel Kent Ltd | Construction | 2018 |
| WB Build Ltd | Construction | 2017 |
| Wcar Limited | Administrative & support | 2018 |
| WD & SON Paving Limited | Construction | 2023 |
| WE ARE Housework Ltd | Administrative & support | 2020 |
| WE Begin Limited | Health & social care | 2023 |
| WE Love Events Limited | Other services | 2018 |
| WE Shft Limited | Professional & scientific | 2021 |
| Wealth Places Ltd | Information & communication | 2022 |
| Wealthea Group Ltd | Real estate | 2023 |
| Web for Solution Ltd | Information & communication | 2022 |
| Web Training Limited | Real estate | 1990 |
| Web.Me Ltd | Information & communication | 2026 |
| Webb DRY Lining Ltd | Construction | 2004 |
| Webster Grab Hire Limited | Administrative & support | 2023 |
| Webuyanyhousequick Limited | Real estate | 2020 |
| WEG Property Development Limited | Construction | 2025 |
| Weghomes Ltd | Real estate | 2017 |
| Welch Data Consulting Limited | Information & communication | 2020 |
| Well Made Ltd | Wholesale & retail | 2012 |
| Wellbeing Massage Rochester Ltd. | Other services | 2011 |
| Wells 5 Fish Bar Limited | Hospitality | 2026 |
| Wells I Never! Productions Ltd. | Education | 2025 |
| Wellsy Scaffolding Services Ltd | Construction | 2024 |
| Wenokes Limited | Professional & scientific | 2025 |
| Werburgh Limited | Administrative & support | 2019 |
| Werburgh Property Ltd | Real estate | 2021 |
| Weserv Ltd | Information & communication | 2023 |
| West Doors and Carpentry Ltd | Manufacturing | 2020 |
| West Kent Downs Countryside Trust | Agriculture & fishing | 2000 |
| WEST4SOUTH Limited | Wholesale & retail | 2021 |
| Westbay Homes Limited | Construction | 2024 |
| Westchester Health Company UK Limited | Professional & scientific | 2016 |
| Westernfirealarm Limited | Administrative & support | 2023 |
| Westover Housing Ltd | Real estate | 2025 |
| Westview Construction Ltd | Construction | 2025 |
| Wharf Developments Greenwich Limited | Real estate | 2000 |
| What to Spend IT on Ltd | Wholesale & retail | 2021 |
| Wheels (Gravesend) Ltd | Wholesale & retail | 1990 |
| Whetton Wild FX Ltd | Extraterritorial | 2025 |
| Whfg (Residents) Management Company Ltd | Households | 2024 |
| White & White Contractual Services Limited | Health & social care | 2022 |
| White Blue Investments Limited | Extraterritorial | 2019 |
| White Blue Limited | Information & communication | 2025 |
| White Label Developing Limited | Information & communication | 2018 |
| White Raven Contractors Limited | Construction | 2018 |
| White River Capital Limited | Professional & scientific | 2021 |
| White River Publishing Limited | Information & communication | 2022 |
| Whitebread Holdings Limited | Financial services | 2022 |
| Whitedot Scientific Ltd | Extraterritorial | 2008 |
| Whiteheat Marketing Ltd | Wholesale & retail | 1998 |
| Whiting Scaffolding Ltd | Construction | 2017 |
| Whitstable Windows Ltd | Wholesale & retail | 2025 |
| Whitstable Yoga & Wellbeing Centre Limited | Arts & recreation | 2024 |
| Wholebeing Care Limited | Health & social care | 2015 |
| Wholesale Stuff Ltd | Wholesale & retail | 2018 |
| WHY and SO Ltd | Education | 2025 |
| Wickham Hoist Limited | Manufacturing | 1998 |
| Wicking Holdings Limited | Professional & scientific | 2019 |
| Wideheath Limited | Construction | 1992 |
| Wierton Meadow Management Limited | Administrative & support | 2020 |
| Wierton Place (Management) Limited | Administrative & support | 2016 |
| Wierton Place Homes Limited | Other services | 2010 |
| Wikway Ltd | Transport & logistics | 2025 |
| Wilchar Plumbing Ltd | Construction | 2015 |
| Wild at Heart Learning Ltd | Education | 2020 |
| Wild Isles Catering Co. Ltd | Hospitality | 2014 |
| Wild Spirits of Kent Limited | Wholesale & retail | 2023 |
| Wilde Building and Civil Engineering Ltd | Construction | 2019 |
| Wilder Kaiser Ltd | Hospitality | 2026 |
| Wildfireco Ltd | Information & communication | 2026 |
| Wilkinsons Building and Home Improvements Ltd | Construction | 2025 |
| Willmarsh Logistics Ltd | Transport & logistics | 2020 |
| Willock's Ltd | Households | 2023 |
| Willoughby Electrical Ltd | Construction | 2018 |
| Willow Media Ltd | Information & communication | 2022 |
| Willow Tree Carpentry Ltd | Construction | 2023 |
| Willowpoint Limited | Extraterritorial | 2009 |
| Willy BBQ Life Ltd | Professional & scientific | 2023 |
| Wilma Professional Care Ltd | Health & social care | 2022 |
| Wiltech Engineering Limited | Manufacturing | 2003 |
| Winder Hire Services Limited | Extraterritorial | 2014 |
| Windhall Limited | Administrative & support | 2025 |
| Windmill Contracts & Sons Limited | Construction | 2013 |
| Windmill Contracts Limited | Construction | 2004 |
| Windmill Court (Sheerness) Management Company Limited | Real estate | 2013 |
| Windowplan Limited | Construction | 1998 |