| Warrenne Keep Management Company Limited | Households | 2009 |
| Waterhouse Talent Ltd | Professional & scientific | 2022 |
| Watson FIC Limited | Financial services | 2026 |
| Wax.Connect Ltd | Professional & scientific | 2014 |
| Waycot Consultancy Limited | Administrative & support | 2016 |
| WE& Capital Limited | Financial services | 2022 |
| Wearehue Limited | Arts & recreation | 2018 |
| Webstem Ltd | Information & communication | 2019 |
| Weflex 2 Ltd | Administrative & support | 2016 |
| Welcome WOK Inn Ltd | Hospitality | 2017 |
| Well Spotted Limited | Wholesale & retail | 2003 |
| Welland Kitchen Ltd | Hospitality | 2026 |
| Welland Partners LLP | | 2015 |
| Welland Properties Limited | Real estate | 2014 |
| Welland School of Dancing Ltd | Education | 2024 |
| Wellandvale ECU Solutions Ltd | Wholesale & retail | 2026 |
| Wellbeing Orchard Limited | Education | 2022 |
| Wenden Garage Ltd | Wholesale & retail | 2026 |
| West Africa Operations Ltd | Financial services | 2025 |
| West Street Garage (Stamford) Limited | Wholesale & retail | 2009 |
| Weston House (Stamford) Ltd | Real estate | 2014 |
| Wever Group Limited | Financial services | 2025 |
| WH Birchwood Ltd | Real estate | 2026 |
| Wharf Road Properties Ltd | Real estate | 2018 |
| Wheatley Services Limited | Professional & scientific | 2026 |
| White & Rawlings Ltd | Financial services | 2021 |
| White Ginger Limited | Wholesale & retail | 2016 |
| White Light Enterprises Ltd | Wholesale & retail | 2012 |
| Whitefield Plastering Limited | Construction | 2025 |
| Whitehousejames Limited | Financial services | 2022 |
| Whittlestone Builders Ltd | Construction | 2017 |
| Whittlestone Homes Ltd | Construction | 2021 |
| Wildcats Group Ltd | Education | 2022 |
| Wildhive Central Office Limited | Administrative & support | 2022 |
| Wilding Joinery Ltd | Construction | 2022 |
| Wildwood Pets Ltd | Wholesale & retail | 2023 |
| William George Ltd | Wholesale & retail | 2022 |
| William Hine Ltd | Construction | 2013 |
| William Reynolds (Farmers) Limited | Agriculture & fishing | 1960 |
| Williams Solar Farming Limited | Agriculture & fishing | 2023 |
| Williams Westfield Ltd | Professional & scientific | 2026 |
| Willow & Stone Properties Ltd | Real estate | 2025 |
| Willow Land & Property Ltd | Real estate | 2024 |
| Willow Tree Associates Limited | Administrative & support | 2025 |
| Willowbrook 1946 Ltd | Real estate | 2017 |
| Wilson & Williams Ltd | Real estate | 2025 |
| Wilson Brown Consulting Ltd | Professional & scientific | 2019 |
| Wilson Finance Limited | Financial services | 1994 |
| Winning People Limited | Professional & scientific | 1997 |
| Winston Gladdle Limited | Real estate | 1955 |
| Winterton Bros Speed Shop Ltd | Manufacturing | 2023 |
| Wizard of Oilz Limited | Manufacturing | 2024 |
| WJH Group Ltd | Construction | 2018 |
| WL Holdco Ltd | Professional & scientific | 2026 |
| Wobbl Limited | Health & social care | 2024 |
| Woburn Wealth Management Ltd | Financial services | 2023 |
| Womack Consulting Limited | Professional & scientific | 2014 |
| Woodcraft Tree Services Ltd | Administrative & support | 2014 |
| Woodston Cleaning Services Limited | Administrative & support | 2021 |
| Woodys Catering Ltd | Hospitality | 2023 |
| Woolfox Golf & Country Club Limited | Arts & recreation | 2020 |
| Wordsworth Homes Ltd | Construction | 2024 |
| Wordsworth Lettings Ltd | Real estate | 2024 |
| Wordsworth Retreats Ltd | Hospitality | 2024 |
| Work IT OUT Consulting Ltd | Administrative & support | 2023 |
| Wothorpe Park Estate Holdings Limited | Professional & scientific | 2014 |
| Wothorpe Park Estate Ltd | Real estate | 2013 |
| WPD (Felsted) Limited | Real estate | 2019 |
| WPD (Stratford) Limited | Real estate | 2017 |
| Wren Property Limited | Real estate | 2018 |
| Write Finder Ltd | Professional & scientific | 2021 |
| Writestars Ltd | Professional & scientific | 2012 |
| WS Staff Carpentry and Building Ltd | Construction | 2019 |
| Wyndcote Consulting Limited | Professional & scientific | 2015 |
| Wythe Holland Limited | Professional & scientific | 2011 |
| Xplane Consulting Ltd | Professional & scientific | 2019 |
| XXM Holdings Ltd | Other services | 2026 |
| Xylocide Ltd | Information & communication | 2021 |
| Yates Mechanical Engineering Limited | Professional & scientific | 2015 |
| YMJ Property Ltd | Real estate | 2026 |
| Yoke Global Limited | Financial services | 2013 |
| YOU Aesthetics Limited | Other services | 2024 |
| You.Development Ltd | Professional & scientific | 2016 |
| Young Leaders Martial Arts Ltd | Health & social care | 2026 |
| Your Marque Automotive Limited | Wholesale & retail | 2015 |
| Yourcore Reformer Ltd | Health & social care | 2024 |
| Youth Dreams Group Ltd | Financial services | 2025 |
| Youth Dreams Pizza Ltd | Hospitality | 2025 |
| YYV Properties Limited | Real estate | 2012 |
| Zada Catering Ltd | Hospitality | 2025 |
| Zada Turkish Ltd | Hospitality | 2024 |
| Zaza Blends Ltd | Other services | 2026 |
| Zebra Self Storage Limited | Transport & logistics | 2021 |
| ZEDDICUSS3D Limited | Information & communication | 2016 |
| ZEN DAO Ltd | Hospitality | 2016 |
| Zhuzh Hair Co. Ltd | Other services | 2023 |
| Zorba 4 Stamford Limited | Hospitality | 2025 |