| West & Wales Property Management Limited | Professional & scientific | 1998 |
| West & Wales Property Services Ltd. | Administrative & support | 2012 |
| West Bay Club Limited | Administrative & support | 2009 |
| West Bay Construction and Development Company Limited | Administrative & support | 2009 |
| West Bay Holdings Limited | Administrative & support | 2009 |
| West Country Steel Buildings Limited | Construction | 2008 |
| West Environmental Limited | Construction | 2019 |
| West Environmental SVS Ltd | Transport & logistics | 2022 |
| West GAS Networks Limited | Professional & scientific | 2012 |
| West Hill Developers Ltd | Real estate | 2017 |
| West Island Developments Limited | Construction | 2003 |
| West Park and Bryngwyn Ltd | Health & social care | 2014 |
| West Street Kilkhampton Limited | Administrative & support | 2021 |
| West Wight Skips Ltd | Water & waste | 2024 |
| West Wight Storage Limited | Transport & logistics | 2023 |
| West Wight Worx Ltd | Manufacturing | 2021 |
| West Zero Nine Ltd | Real estate | 2026 |
| Westbourne Williams Limited | Real estate | 2007 |
| Westeen Ltd | Wholesale & retail | 2023 |
| Western Eastern Business Enterprise Limited | Real estate | 2022 |
| Western Electrical Installations Limited | Energy | 2008 |
| Western GAS Networks Limited | Professional & scientific | 2012 |
| Western Roadworks Limited | Wholesale & retail | 1979 |
| Westernair Calibrations Limited | Other services | 2025 |
| Westfield Apartments (Shanklin) Limited | Real estate | 2014 |
| Westfield Mansion (Bonchurch) Limited | Households | 2001 |
| Westgate City Property Ltd | Real estate | 2007 |
| Westhill Apartments Limited | Households | 2003 |
| Westie Building Services Ltd | Construction | 2026 |
| Westie Electrical Services Ltd | Construction | 2024 |
| Westminster Joinery (Isle of Wight) Ltd | Manufacturing | 2003 |
| Westover Farm Contractors Limited | Agriculture & fishing | 2001 |
| Westover Fleet Management Limited | Wholesale & retail | 2008 |
| Westpoint Baring Management Company Limited | Households | 2011 |
| Westridge Limited | Other services | 1992 |
| Westridge Waste Management Limited | Water & waste | 2013 |
| Westward Management Services Limited | Hospitality | 2008 |
| Westward Surveillance Ltd | Administrative & support | 2025 |
| Westwinds 57 Ltd | Administrative & support | 2016 |
| Westwinds Horizon Ltd | Real estate | 2025 |
| Westwood Dynamic Ltd | Administrative & support | 2023 |
| WF Advisory Limited | Professional & scientific | 2026 |
| WF Carpentry Ltd | Manufacturing | 2023 |
| WG Practice Holdings Limited | Professional & scientific | 2016 |
| Whale Assets Ltd | Financial services | 2024 |
| Wheeler's Cafe Limited | Hospitality | 2022 |
| WHH Property Investments Ltd | Real estate | 2025 |
| Whirlybirdz Ltd | Information & communication | 2021 |
| Whitchurch Food Ltd | Hospitality | 2024 |
| White Aircraft Services Limited | Manufacturing | 2026 |
| White Brothers & Speed Limited | Construction | 1975 |
| White Mice Estates Limited | Real estate | 2015 |
| White RAT Machinery Limited | Wholesale & retail | 2018 |
| White Whales Digital Ltd | Information & communication | 2020 |
| White Windows Limited | Construction | 2013 |
| Whiteclad Ltd | Construction | 2025 |
| Whitehall Capital Ltd | Real estate | 2022 |
| Whitehall Estates Ltd | Construction | 2019 |
| Whitehall Glamping Ltd | Hospitality | 2021 |
| Whitehart & Co Digital Limited | Information & communication | 2017 |
| Whitehart & Co Property Ltd | Real estate | 2020 |
| Whitehead Building Services (Bristol) Limited | Construction | 2005 |
| Whitehead Building Services (Swansea) Limited | Construction | 1956 |
| Whitehead Building Services Limited | Construction | 1978 |
| Whitehead Sports and Social Club CIC | Hospitality | 2021 |
| Whiteoak Carpentry Contractors Ltd | Construction | 2018 |
| Whitewood Developments Ltd | Construction | 2026 |
| Whitson Prestige Ltd | Wholesale & retail | 2015 |
| Whittingham-Archer Property Limited | Real estate | 2025 |
| Whole Food Wellness Ltd | Health & social care | 2025 |
| Wholesale Catering 12 Limited | Wholesale & retail | 2025 |
| Wholesome Coaching Limited | Arts & recreation | 2025 |
| WHP2 Limited | Real estate | 2016 |
| Whsk Limited | Wholesale & retail | 2026 |
| Wibli Wobli Nursery Ltd | Health & social care | 2022 |
| Wicket 2 Wicket Limited | Arts & recreation | 2021 |
| Wickiden Compliance Solutions Limited | Professional & scientific | 2025 |
| Wiew Ltd | Information & communication | 2020 |
| Wiggin Building Services Ltd | Construction | 2004 |
| Wight Axes Limited | Wholesale & retail | 2026 |
| Wight Badger Ltd | Manufacturing | 2026 |
| Wight Bike Eco-Solutions Limited | Wholesale & retail | 2016 |
| Wight Celebrants Ltd | Other services | 2022 |
| Wight Choice Cleaning Ltd | Administrative & support | 2019 |
| Wight Choice Linen Ltd | Administrative & support | 2019 |
| Wight Choice Management Ltd | Households | 2019 |
| Wight Choice Property Services Ltd | Water & waste | 2018 |
| Wight Coaches Limited | Transport & logistics | 2019 |
| Wight Coffin Company Ltd | Manufacturing | 2023 |
| Wight Digital Radio CIC | Information & communication | 2024 |
| Wight Digital Solutions Ltd | Administrative & support | 2011 |
| Wight Essence Ltd | Agriculture & fishing | 2025 |
| Wight Farmed Limited | Other services | 2025 |
| Wight Folly Limited | Real estate | 2016 |
| Wight Genetics Ltd | Manufacturing | 2018 |
| Wight Harmony Aesthetics Ltd | Other services | 2024 |
| Wight Hart Developments Ltd | Construction | 2026 |
| Wight HAT Limited | Information & communication | 2007 |
| Wight HAT Ventures Limited | Information & communication | 2017 |
| Wight Heating Limited | Construction | 2015 |