| Wedland Homes Limited | Real estate | 2020 |
| WEL Holdco 1 Group Limited | Financial services | 2022 |
| WEL Holdco 2 Group Limited | Financial services | 2022 |
| WEL Holdco 3 Group Limited | Financial services | 2022 |
| WEL Holdco 5 Group Limited | Financial services | 2022 |
| WEL Holdco 6 Group Limited | Financial services | 2022 |
| WEL Holdco 7 Group Limited | Financial services | 2022 |
| Welcome Motorhomes Limited | Wholesale & retail | 2026 |
| Wellington House Management (Skegness) Limited | Real estate | 2016 |
| Wellowgate Holdings Limited | Financial services | 2013 |
| Wellowgate Hotels Limited | Real estate | 2013 |
| Wendon Gift Shop Limited(The) | Other services | 1987 |
| Westlea Caravan Park Limited | Hospitality | 2011 |
| Wexborough Ltd | Manufacturing | 2025 |
| Whistle Stop Bistro Limited | Hospitality | 2024 |
| White and Co Cosmetics UK Limited | Wholesale & retail | 2016 |
| White House Energy Limited | Energy | 2015 |
| White House Farm Feedstock Limited | Agriculture & fishing | 2015 |
| White House Farm Shop and Dairy Ltd | Agriculture & fishing | 2024 |
| Whitfield Energy Limited | Energy | 2013 |
| Wicked Candy UK Ltd | Wholesale & retail | 2024 |
| Wilcura Ltd | Information & communication | 2022 |
| Wildest Amusements Holdings Limited | Financial services | 2025 |
| Wildest Amusements Limited | Arts & recreation | 2023 |
| Wildflower Retreats Ltd | Hospitality | 2025 |
| Willingsby Limited | Extraterritorial | 1985 |
| Willoughby (30) Limited | Professional & scientific | 1994 |
| Willows Caravan Sales Limited | Wholesale & retail | 2019 |
| Willsons Property Professionals Limited | Real estate | 2021 |
| Wiltshire Automotive Services Ltd | Administrative & support | 2020 |
| Winlex Afrimart Ltd | Wholesale & retail | 2024 |
| Winter Event Catering Ltd | Hospitality | 2017 |
| Witham Management Company Limited | Real estate | 2005 |
| Wolds & Waves Ltd | Hospitality | 2026 |
| Wolfstagg Ltd | Wholesale & retail | 2017 |
| Woodhall Spa Management Company Limited | Real estate | 2016 |
| Woodland Property's Management Ltd | Construction | 2017 |
| Word Play Speech Therapy Ltd | Health & social care | 2021 |
| World Cargo Services Limited | Transport & logistics | 2024 |
| Wrates Leisure Ltd | Hospitality | 2025 |
| Wren Farm Ltd | Hospitality | 2021 |
| Wren Farm Retreats Ltd | Hospitality | 2026 |
| Wxnted Ltd | Wholesale & retail | 2026 |
| X-L Garage Limited | Wholesale & retail | 1997 |
| Xamolxe Limited | Health & social care | 2017 |
| Y14 Ltd | Hospitality | 2024 |
| YE Old Copper Kettle Limited | Hospitality | 2023 |
| Yildiz Grocery Limited | Wholesale & retail | 2025 |
| Yulebaron Limited | Construction | 1988 |
| ZAP Exterior Solutions Ltd | Administrative & support | 2025 |
| Ziffi Mart Limited | Professional & scientific | 2018 |
| Zoky Saunascape Ltd | Health & social care | 2024 |
| Zone Systems Holdings Ltd | Financial services | 2018 |
| Zone Systems Maintenance Limited | Manufacturing | 2018 |