| Watkins Glass Limited | Construction | 2010 |
| Watson & Fawn Lettings Ltd | Real estate | 2018 |
| Wave Hill Consulting Ltd | Professional & scientific | 2015 |
| Wellness Principle Ltd | Professional & scientific | 2025 |
| Wentworth Grounds Maintenance Ltd | Other services | 2019 |
| Wessex Property Consultants Limited | Construction | 1988 |
| West Hill Place Management Limited | Households | 1987 |
| West Mills (Fordingbridge) Management Limited | Households | 2001 |
| Westcliff Studios Management Company (13) Limited | Households | 1986 |
| Westgrove Road Residents Co Ltd | Real estate | 2025 |
| Westrop Heritage Limited | Construction | 2015 |
| Whitewaters (Sea Road) Management Company Limited | Households | 2005 |
| Whitsbury Accounting & Finance Limited | Professional & scientific | 2015 |
| Whitsbury Manor Stud Limited | Agriculture & fishing | 2023 |
| Whizbang Films International Ltd | Information & communication | 2006 |
| Wild at Heart Ltd | Professional & scientific | 2019 |
| Wildvine Properties Limited | Real estate | 2025 |
| Wilson Business Partnership Limited | Professional & scientific | 2018 |
| Wimborne (T) Hairdressing Ltd | Other services | 2017 |
| Windsbrook Management Ltd | Hospitality | 2025 |
| Winkton Securities Limited | Real estate | 1988 |
| Winkworth Phalp Property Solutions Ltd | Real estate | 2019 |
| Wokthiswayuk Ltd | Hospitality | 2025 |
| Woodburners and Sweeps (South) Ltd | Construction | 2024 |
| Woodlands House Management Company (Sandleheath) Limited | Households | 2014 |
| Workmatik Limited | Professional & scientific | 2024 |
| Wren IT Ltd | Information & communication | 2018 |
| Wwnd Development Ltd | Construction | 2021 |
| Wynne Evans Ltd | Arts & recreation | 2010 |
| XR Pro Ltd | Information & communication | 2020 |
| YET Another Cunning Plan Limited | Extraterritorial | 2013 |
| Your Computer People Ltd | Information & communication | 2021 |
| ZOO Lane Productions Limited | Information & communication | 1995 |
| Æternus Medical Ltd | Health & social care | 2024 |