| Wild Westcountry Lettings Ltd | Real estate | 2025 |
| Wild Westcountry Services Ltd | Real estate | 2025 |
| Wildwood Rural Industries Limited | Financial services | 2026 |
| Wildwood Timber Ltd | Agriculture & fishing | 2019 |
| Willdoc Services Ltd | Professional & scientific | 2016 |
| William Garvey Limited | Manufacturing | 1994 |
| William Small Ltd | Information & communication | 2018 |
| WIN WIN Leads Ltd | Professional & scientific | 2021 |
| Win-Wise Ltd | Arts & recreation | 2024 |
| Wingwalkers.Co.Uk Ltd | Arts & recreation | 2025 |
| Winnelo Ltd | Information & communication | 2026 |
| WM Hodge and Sons (Garage) Limited | Real estate | 1962 |
| Wolf Bridge LLP | | 2025 |
| Woodlando Ltd | Agriculture & fishing | 2020 |
| Woodquist Associates Limited | Information & communication | 2017 |
| Worthy Electrical & Property Services Ltd | Construction | 2024 |
| Wozna Ltd | Health & social care | 2012 |
| Wylam Automotive Limited | Wholesale & retail | 2025 |
| Xhosa Properties Limited | Real estate | 2022 |
| Xoanon Publishing Limited | Information & communication | 2001 |
| Xtra-Sense Ltd | Manufacturing | 1997 |
| XY Axis Ltd | Professional & scientific | 2024 |
| Yarty Properties Ltd | Real estate | 2016 |
| Yieldwin Limited | Professional & scientific | 1989 |
| Yonder Ridge Engineering Limited | Manufacturing | 2026 |
| Yosemite Investments Ltd | Financial services | 2010 |
| Your Advantage Consultants Ltd | Information & communication | 2014 |
| Yourspace&Sons Ltd | Real estate | 2025 |
| Zenalytics Ltd | Information & communication | 2022 |
| Zero One Engineering Ltd | Information & communication | 2015 |
| Zero One Racing Ltd | Extraterritorial | 2022 |
| Zizania Ltd | Agriculture & fishing | 2015 |
| Zlateva-Krasteva Ltd | Health & social care | 2012 |
| ZMW Lime Plastering & Rendering Limited | Construction | 2022 |