| Wessex Migration Advisory Ltd | Professional & scientific | 2026 |
| Wessex Neuro Medical Ltd | Health & social care | 2018 |
| Wessex Neuroclinic LLP | | 2019 |
| Wessex Plaster Mouldings Limited | Construction | 2001 |
| Wessex Psychology Ltd | Education | 2025 |
| Wessex Salt Limited | Wholesale & retail | 2012 |
| Wessex Spas Limited | Wholesale & retail | 2006 |
| Wessex Surgery Limited | Health & social care | 2019 |
| Wessex Technical Services Limited | Manufacturing | 2016 |
| Wessex Tiling Ltd | Construction | 2002 |
| Wessex Veterinary Orthopaedics Limited | Professional & scientific | 2023 |
| Wessex Warranties Limited | Wholesale & retail | 2014 |
| Wessex Window Cleaning Services Ltd | Administrative & support | 2008 |
| Wessex Wishes Ltd | Other services | 2025 |
| West Bank Residential Home Limited | Health & social care | 2004 |
| West Cliff House Freehold Limited | Households | 2004 |
| West Cliff Lodge Residents Limited | Households | 1998 |
| West Dorset Leisure Holidays Limited | Hospitality | 1978 |
| West Dorset Marketing Services Ltd | Financial services | 2013 |
| West GEN Ltd | Manufacturing | 2017 |
| West Quay Care Ltd | Administrative & support | 2022 |
| West Quay Freehold Ltd | Households | 2020 |
| West Twelve Global Limited | Professional & scientific | 2018 |
| West Twelve Holdings Ltd | Financial services | 2025 |
| West Twelve Manufacturing Limited | Wholesale & retail | 2014 |
| Westbeach Consulting Limited | Professional & scientific | 2009 |
| Westbourne Dental Surgery Limited | Health & social care | 2022 |
| Westbourne Gifts Ltd | Wholesale & retail | 2018 |
| Westbourne Park Road Management Company Limited | Real estate | 2004 |
| Westcliff Facilities Limited | Construction | 2018 |
| Westcliff Healthcare Solutions Limited | Health & social care | 2022 |
| Westcliff Recruitment Ltd | Administrative & support | 2024 |
| Westcliff Solutions Limited | Information & communication | 2010 |
| Westcoast (East Overcliff) Limited | Construction | 2020 |
| Westcoast (Frampton) Limited | Construction | 2021 |
| Westcoast (Guildford) Limited | Construction | 2015 |
| Westcoast (Purbeck) Limited | Construction | 2015 |
| Westcoast (Romsey) Limited | Construction | 2020 |
| Westcoast Christchurch Road Limited | Construction | 2023 |
| Westcoast Contractors (South) Limited | Construction | 2020 |
| Westcoast Convenience Limited | Construction | 2015 |
| Westcoast Developments (Lulworth) Limited | Construction | 2023 |
| Westcoast Developments (Poole) Limited | Extraterritorial | 2023 |
| Westcoast Developments (Projects) Limited | Construction | 2019 |
| Westcoast Developments (South) Limited | Construction | 2019 |
| Westcoast Developments Group Limited | Financial services | 2019 |
| Westcoast Property Investments Limited | Real estate | 2018 |
| Westcoast Purbeck 2018 Limited | Real estate | 2018 |
| Westell Developments Limited | Construction | 2022 |
| Westell Limited | Construction | 2024 |
| Westerleigh Freehold Company Limited | Households | 2003 |
| Western Court Management Limited | Households | 1985 |
| Western Road Warehouse Limited | Administrative & support | 2018 |
| Western Tydens Limited | Manufacturing | 1948 |
| Westfair Legal Ltd | Information & communication | 2021 |
| Westgate Park Management Company Limited | Households | 1990 |
| Westgate View Limited | Real estate | 2021 |
| Westhaze Limited | Professional & scientific | 2011 |
| Westlands One Holding Limited | Financial services | 2025 |
| Westlands Two Holding Limited | Financial services | 2025 |
| Westminster Cottage (Management) Limited | Professional & scientific | 1997 |
| Westons Point Boat Storage Ltd | Transport & logistics | 2011 |
| Westover Cars Limited | Wholesale & retail | 2025 |
| Westover Jaguar Land Rover Specialists Limited | Wholesale & retail | 2025 |
| Westover Sports Cars Limited | Wholesale & retail | 2025 |
| Westview Capital Limited | Real estate | 2014 |
| Westwood Civil Construction Limited | Construction | 2024 |
| Westwood Liquid Technologies Limited | Wholesale & retail | 2013 |
| Wexa Digital Ltd | Professional & scientific | 2025 |
| Wexford Films Limited | Arts & recreation | 1976 |
| Weymouth English Centre Limited | Education | 2004 |
| Wfmuk Ltd | Professional & scientific | 2023 |
| Wgcfc Media Ltd | Professional & scientific | 2026 |
| WH Assets Limited | Health & social care | 2024 |
| WH Property Projects Ltd | Construction | 2025 |
| Whaley Entertainments Ltd | Arts & recreation | 2015 |
| Whanau Limited | Real estate | 2019 |
| Wharfside Consulting Limited | Professional & scientific | 2014 |
| What's That? Limited | Information & communication | 2024 |
| Wheelie Bike Shop Ltd | Wholesale & retail | 2017 |
| Wheelspin Comps Ltd | Wholesale & retail | 2025 |
| Whimsicool Ltd | Manufacturing | 2024 |
| Whit Enterprises Limited | Information & communication | 2010 |
| White & I Construction Ltd | Construction | 2022 |
| White Goods Maintenance Limited | Financial services | 2019 |
| White House Flats Management Company Limited | Households | 1996 |
| White House Park Management Limited | Real estate | 1998 |
| White Knight Ltd | Real estate | 2003 |
| White Lodge Rest Home Limited | Health & social care | 2012 |
| White on Ltd | Wholesale & retail | 2014 |
| White Pearl Capital Limited | Financial services | 2019 |
| White Pepper Cookery Limited | Education | 2010 |
| White Pines Management Limited | Households | 2018 |
| White Pines RTM Company Limited | Households | 2021 |
| White Property Management (Poole) Limited | Real estate | 2019 |
| White Sail Properties Ltd | Real estate | 2023 |
| White Shore Accounting Ltd | Professional & scientific | 2023 |
| White Ways Ltd | Financial services | 2015 |
| White Wings Management Limited | Households | 2017 |
| Whitecliff Park RTM Company Limited | Administrative & support | 2016 |