| Wilda Swim Ltd | Wholesale & retail | 2023 |
| Wilkinson Simons Development Limited | Real estate | 2010 |
| Wiltshire Glass & Glazing Ltd | Construction | 2022 |
| Wiltshire SEN Assessment for Learning Ltd | Education | 2023 |
| Winkler Consulting Ltd | Health & social care | 2014 |
| Wise, Wild & Well Retreats Limited | Arts & recreation | 2025 |
| Wishford Education Holdco 2 Limited | Financial services | 2022 |
| Wishford Education Holdco 3 Limited | Financial services | 2024 |
| Wishford H1 Limited | Professional & scientific | 2012 |
| Wishford H2 Limited | Professional & scientific | 2012 |
| Wishford H3 Limited | Education | 2014 |
| Wishford H4 Limited | Education | 2014 |
| Wishford Nurseries Limited | Health & social care | 2023 |
| Wishford P1 Limited | Real estate | 2012 |
| Wishford P2 Limited | Real estate | 2012 |
| Wishford P3 Limited | Real estate | 2014 |
| Wishford P5 Limited | Real estate | 2015 |
| Wishford P6 Limited | Real estate | 2015 |
| Wishford Schools (Group) Limited | Education | 2011 |
| With Kids Media Ltd | Information & communication | 2013 |
| WMR Plumbing and Heating Ltd | Construction | 2025 |
| WNB Limited | Extraterritorial | 2022 |
| Womad Limited | Arts & recreation | 1992 |
| Women Empowering Defence CIC | Administrative & support | 2023 |
| Woodago Eco Solutions Limited | Hospitality | 2020 |
| Woods Wine & Deli Shop Limited | Wholesale & retail | 2013 |
| World Council for Health CIC | Health & social care | 2023 |
| World Food Estate Ltd | Wholesale & retail | 2024 |
| World of Music Arts and Dance Foundation(The) | Arts & recreation | 1984 |
| World of Womad Limited | Administrative & support | 2024 |
| Worth Press Limited | Information & communication | 1999 |
| Wotan Securities (Salisbury) Limited | Real estate | 1993 |
| Wotan Securities Limited | Construction | 1990 |
| WOW Cottages Ltd | Hospitality | 2017 |
| YEW and ME Garden Services Ltd | Administrative & support | 2005 |
| YOR Holdings Limited | Financial services | 2024 |
| Yorkshire Capital Properties Limited | Agriculture & fishing | 1976 |
| Young Ambitions Limited | Health & social care | 2021 |
| Zealous Kite Ltd | Information & communication | 2014 |
| Zetacast Limited | Information & communication | 2002 |