| Wedeclutter Ltd | Other services | 2025 |
| West and Pepper Ltd | Construction | 2025 |
| West Cornwall Property Development Company Limited | Construction | 2023 |
| West Wiltshire Radio Ltd | Information & communication | 2019 |
| Westbury House (Bradford-On-Avon) Limited | Households | 1981 |
| Westleigh Investments Holdings Limited | Professional & scientific | 2006 |
| Westwood Renovations Ltd | Construction | 2026 |
| Whitestone Commercial Ltd | Administrative & support | 2015 |
| Whitestone Surveyors Ltd | Professional & scientific | 2020 |
| WHO Cares Limited | Wholesale & retail | 2005 |
| Wicks Educational Consulting Ltd | Education | 2023 |
| Wilder Oak Ltd | Financial services | 2024 |
| Wildfire Enterprises Limited | Financial services | 2020 |
| Wildwood Projects Ltd | Construction | 2025 |
| Wiltshire Equine Assisted Learning Ltd | Education | 2011 |
| Wiltshire Wealth Ltd | Financial services | 2020 |
| Wise Monkeys Software Limited | Information & communication | 2019 |
| Wishlist Recruitment (Services) Limited | Administrative & support | 2011 |
| Wolsey Lodges Limited | Hospitality | 1984 |
| Woolley Street Residents Limited | Administrative & support | 2015 |
| XRN Ltd | Professional & scientific | 2019 |
| Yarg Limited | Information & communication | 1997 |
| Yclept Ltd | Construction | 2026 |
| Yenisey Ltd | Agriculture & fishing | 2021 |
| ZEALOU5 Ltd | Wholesale & retail | 2011 |
| ZED Accountancy Ltd | Professional & scientific | 2021 |
| Zeeman Lisle Property Ltd. | Real estate | 2003 |
| Zeus Ltd. | Professional & scientific | 2009 |
| Zyra Attire Ltd | Manufacturing | 2025 |