| Warm Blue Holdings Ltd | Real estate | 2021 |
| Warm Blue Ltd | Real estate | 2021 |
| Waterfox Consultancy Ltd | Professional & scientific | 2009 |
| Waterloo Road Freehold Limited | Households | 2019 |
| Watersedge Management Company (Weymouth) Limited | Households | 2011 |
| Waterside Holiday Group Limited | Hospitality | 1988 |
| Waterside Holiday Parks Limited | Financial services | 2019 |
| Watford Lion PUB Co Limited | Hospitality | 2026 |
| Watson Locke Limited | Construction | 2017 |
| Waves Management Limited | Households | 2002 |
| Wayne Enterprises (S.W.) Ltd | Construction | 2016 |
| WE ARE Weymouth Limited | Other services | 2012 |
| Weartrade Holdings Ltd | Financial services | 2017 |
| Weartrade Ltd | Wholesale & retail | 2003 |
| Weartrade Property Ltd | Real estate | 2017 |
| Web Strategists Ltd | Professional & scientific | 2017 |
| Weblink Computers Limited | Information & communication | 1996 |
| Weeden Masonry Limited | Manufacturing | 2014 |
| Welch Groundworks Ltd | Construction | 2022 |
| Weld & Mech Ltd | Manufacturing | 2017 |
| Weldcore Limited | Construction | 2024 |
| Weldon Fabrications Ltd | Manufacturing | 2023 |
| Welfare Management Ltd | Hospitality | 2016 |
| Wellington Court (Weymouth) Management Company Limited | Households | 1984 |
| Wemoveyouweymouth Ltd | Transport & logistics | 2025 |
| Wentworth Guesthouse Limited | Hospitality | 2009 |
| Wessex & West Building Surveys Limited | Professional & scientific | 2021 |
| Wessex Aerials Ltd | Other services | 2004 |
| Wessex Air Conditioning Limited | Construction | 2004 |
| Wessex Coaches Limited | Wholesale & retail | 2018 |
| Wessex Executive Coaches Ltd | Transport & logistics | 2023 |
| Wessex GAS Works Limited | Households | 2002 |
| Wessex Golf Centre Ltd | Arts & recreation | 2003 |
| Wessex Grounds Services Ltd | Administrative & support | 2013 |
| Wessex Insulation (SW) Limited | Construction | 2018 |
| Wessex Landscapes Limited | Administrative & support | 2017 |
| Wessex MDS Limited | Information & communication | 2014 |
| Wessex Plumbing & Heating Services Limited | Construction | 1997 |
| Wessex Traditional Martial Arts Ltd | Education | 2013 |
| Wessex Trichology Clinic Limited | Health & social care | 2019 |
| Wessex Window Repairs Limited | Construction | 2004 |
| West Fossil Estate Limited | Agriculture & fishing | 1996 |
| West Knighton Machining Ltd | Professional & scientific | 2016 |
| West-Country Group (Dorset) Ltd | Construction | 2025 |
| Westbrook Corporate Funding Limited | Financial services | 1993 |
| Westerhall Properties (Weymouth) Limited | Households | 1992 |
| Westham Road Bakery Limited | Wholesale & retail | 2012 |
| Weston House Portland Limited | Households | 1988 |
| Westwey Court Weymouth Limited | Real estate | 2015 |
| Westwinds Management Company Limited | Households | 1991 |
| Westwood Engineering Ltd | Professional & scientific | 2024 |
| Westwood Homes Limited | Administrative & support | 1962 |
| Westwood Investments Limited | Extraterritorial | 1959 |
| Westwood Securities Limited | Extraterritorial | 1953 |
| WEY Consult Limited | Professional & scientific | 2013 |
| WEY FIX Ltd | Professional & scientific | 2025 |
| Weyblast Ltd | Professional & scientific | 2013 |
| Weybuild & Maintenance Co LLP | | 2006 |
| Weychill Ltd | Energy | 2025 |
| Weyco Services Limited | Hospitality | 2006 |
| Weyfish Boat Company Limited | Agriculture & fishing | 2019 |
| Weyfish Holdings Limited | Financial services | 2017 |
| Weyfish Ltd. | Manufacturing | 1988 |
| Weyforward CIC | Agriculture & fishing | 2016 |
| Weyland-Yutani Corporation Limited | Information & communication | 1996 |
| Weylet Ltd | Real estate | 2025 |
| Weyline Cars Limited | Transport & logistics | 2006 |
| Weymotion Physio Ltd | Health & social care | 2025 |
| Weymouth & Portland Builders Ltd | Construction | 2013 |
| Weymouth & Portland Scaffolding Ltd | Construction | 2013 |
| Weymouth Aerials Ltd | Information & communication | 2024 |
| Weymouth and Portland RFC Trading Ltd | Arts & recreation | 2023 |
| Weymouth Angling Centre Ltd | Wholesale & retail | 1996 |
| Weymouth Area Development Trust CIC | Health & social care | 2017 |
| Weymouth Barbershop Ltd | Other services | 2023 |
| Weymouth Bay Coffee Co Ltd | Hospitality | 2023 |
| Weymouth Bay Estates Limited | Real estate | 2017 |
| Weymouth Bay RIB Charter Limited | Administrative & support | 2009 |
| Weymouth Bay Sea Swimmers CIC | Arts & recreation | 2016 |
| Weymouth Chutneys Ltd | Hospitality | 2023 |
| Weymouth Civic Society | Arts & recreation | 2012 |
| Weymouth Codfathers Limited | Hospitality | 2018 |
| Weymouth Construction Limited | Construction | 2015 |
| Weymouth Electrical Services Ltd | Construction | 2021 |
| Weymouth Family Church Ltd | Health & social care | 2012 |
| Weymouth Fencing Ltd | Construction | 2011 |
| Weymouth Fire Ltd | Public administration | 2024 |
| Weymouth Football Club Limited | Arts & recreation | 1924 |
| Weymouth GAS Limited | Construction | 2013 |
| Weymouth Gateway Property Management Limited | Administrative & support | 2011 |
| Weymouth GIN Limited | Wholesale & retail | 2021 |
| Weymouth Golf Club Limited | Arts & recreation | 1965 |
| Weymouth Heritage Centre Limited | Other services | 2013 |
| Weymouth Hockey Pitch CIC | Arts & recreation | 2020 |
| Weymouth Holiday Let’S Limited | Hospitality | 2024 |
| Weymouth Home Improvements Ltd | Construction | 2025 |
| Weymouth in the Community CIC | Arts & recreation | 2022 |
| Weymouth Leisure Limited | Financial services | 2009 |
| Weymouth Leisure Vehicle Services Limited | Manufacturing | 2024 |
| Weymouth Mobility Limited | Wholesale & retail | 2011 |