| Wishbone Golf Ltd | Manufacturing | 2018 |
| Wittram Limited | Health & social care | 2006 |
| Woodland Glades (Management) NO 2 Limited | Extraterritorial | 1987 |
| Woodland Glades (Management) NO.1 Limited | Households | 1986 |
| Woodside Lodge Limited | Health & social care | 2001 |
| Wool & Bovington Motors Limited | Wholesale & retail | 1960 |
| Woolbridge Motor Club Ltd | Arts & recreation | 1987 |
| Woolsbridge Construction Services Ltd | Professional & scientific | 2025 |
| Workstays U.K Ltd | Real estate | 2025 |
| World Heritage Limited | Arts & recreation | 2002 |
| Wright Financial Management Limited | Financial services | 2005 |
| Wyvern Cargo Ltd | Transport & logistics | 1983 |
| Xpressive Digital Ladies Ltd | Wholesale & retail | 2025 |
| Yacht Consultancy Limited | Professional & scientific | 2007 |
| Yachting Expert Ltd | Professional & scientific | 2004 |
| Yellow Penguin (YP) Limited | Administrative & support | 2007 |
| Yeoman Preston Property Ltd | Hospitality | 2017 |
| Yieldtrend Limited | Extraterritorial | 1986 |
| Your Company Secretary Ltd | Professional & scientific | 2006 |
| Your Home Zone Limited | Professional & scientific | 2007 |
| Yuanju Ltd | Hospitality | 2025 |
| Zeroid Labs Ltd | Administrative & support | 2024 |
| Zorel (Weymouth) Ltd | Hospitality | 2021 |
| ZTL Ltd | Hospitality | 2022 |
| Zygo Technologies Limited | Information & communication | 2007 |
| Zypha Technologies Limited | Administrative & support | 2007 |