| Thumb Mews Limited | Households | 2016 |
| TNS Global Marketing Ltd | Professional & scientific | 2026 |
| Trafalgar Care Limited | Health & social care | 2010 |
| Training NOW Limited | Education | 2017 |
| Trakworx Ltd | Information & communication | 2007 |
| Twisted Roots Media Limited | Information & communication | 2018 |
| Unit 2 MBC Limited | Real estate | 2018 |
| Vanni Company Limited | Wholesale & retail | 2025 |
| Vanworx-Leisure Vehicle Specialists Ltd. | Wholesale & retail | 2011 |
| Victory Care Home Limited | Health & social care | 2013 |
| Voodoo Vinyl Ltd | Wholesale & retail | 2025 |
| VWX Kombis Limited | Administrative & support | 2017 |
| Wang Food Limited | Hospitality | 2022 |
| Washdown Ltd | Wholesale & retail | 2021 |
| Waterloo Care Home Limited | Administrative & support | 2010 |
| Waterside 1972 Limited | Extraterritorial | 2015 |
| WE Cool South Limited | Construction | 2022 |
| Wessex Property Ltd | Real estate | 2025 |
| West 7 Reclamation Ltd | Wholesale & retail | 2010 |
| Weymouth & Portland Motor Mechanics Ltd | Wholesale & retail | 2011 |
| Weymouth and Portland National Sailing Academy | Arts & recreation | 1999 |
| Weymouth Land Trains Limited | Transport & logistics | 2019 |
| Weymouth Maritime Heritage Community Interest Company | Transport & logistics | 2026 |
| Whinning Times LLC | | 2024 |
| Whip-It Ltd | Wholesale & retail | 2020 |
| White Stones Studios Limited | Hospitality | 2016 |
| Wide Street Recovery & Storage Limited | Transport & logistics | 2023 |
| World of Beauty Ltd | Wholesale & retail | 2025 |
| Wowz Design & Print Limited | Wholesale & retail | 2007 |
| Wpnsa Limited | Arts & recreation | 1999 |
| Wyvern Investments Limited | Financial services | 2007 |
| Your Space - Workshops Ltd | Real estate | 2023 |
| YYS International (UK) Limited | Wholesale & retail | 1994 |