| Weee Manager Ltd | Water & waste | 2025 |
| Weekend Offender Records Ltd | Wholesale & retail | 2021 |
| Welborne MEP Ltd | Construction | 2005 |
| Welbro Project Management Limited | Construction | 2000 |
| Welbro TNG Limited | Financial services | 2022 |
| Welcomeohm UK Ltd | Wholesale & retail | 2019 |
| Weld-Craft Ltd | Manufacturing | 2025 |
| Welfare Garage Limited | Wholesale & retail | 1998 |
| Well Spent Youth Ltd | Administrative & support | 2013 |
| Wellfounded Group Ltd | Professional & scientific | 2024 |
| Wellhot Limited | Hospitality | 1989 |
| Wells Sermo Group Ltd | Financial services | 2025 |
| Wells Sermo Ltd | Information & communication | 2019 |
| WEM Housing Solutions Ltd | Health & social care | 2024 |
| Wembley Football Clothing & Equipment Limited | Extraterritorial | 2007 |
| Wembley Property Developments Ltd | Construction | 2025 |
| Wembley Sports & Leisure Wear Limited | Extraterritorial | 1996 |
| Wendover Dairy Limited | Wholesale & retail | 2013 |
| Wentbridge Cricket Company Limited | Manufacturing | 2024 |
| Wessex Healthcare Ltd | Wholesale & retail | 2012 |
| Wessex Lawncare Ltd | Administrative & support | 2013 |
| West Sussex Carpentry & Building Ltd | Construction | 2002 |
| West Sussex Property Maintenance & Services Limited | Construction | 2023 |
| West Sussex Signs Ltd | Administrative & support | 2008 |
| West Tower Developments Limited | Construction | 2024 |
| West Wittering Building & Joinery Ltd | Manufacturing | 2022 |
| West Wittering Building Consultancy Ltd | Construction | 2015 |
| West Wittering Properties Management Ltd | Real estate | 2018 |
| Westbourne Court RTM Company Limited | Hospitality | 2008 |
| Westcott Property Ltd | Real estate | 2021 |
| Westerhall Limited | Real estate | 2008 |
| Westfield Oaks Freehold Limited | Real estate | 1999 |
| Westmark House (Freehold) Limited | Households | 2012 |
| Westmount Construction (Building Services) Limited | Construction | 2023 |
| Westpipe Civil Engineering Contractors Limited | Wholesale & retail | 1991 |
| Westvale Property Developments Limited | Construction | 2015 |
| Westvale Property Investments Ltd | Real estate | 2009 |
| Westwood Projects Ltd | Manufacturing | 2021 |
| Wetenhall Ltd | Manufacturing | 2019 |
| Wetwheels Hamble CIC | Arts & recreation | 2020 |
| Wetwheels Solent CIC | Arts & recreation | 2020 |
| Wewill Services Ltd | Information & communication | 2021 |
| Weyriver Ltd | Transport & logistics | 2022 |
| WGL Holdings Limited | Financial services | 2024 |
| What About YE Ltd | Health & social care | 2025 |
| What Matters Group Limited | Administrative & support | 2026 |
| What's IT Worth Ltd | Wholesale & retail | 2026 |
| What's on Flamingo Boss Limited | Arts & recreation | 2025 |
| Wheel A&E Limited | Wholesale & retail | 2019 |
| Wheel A&R Limited | Wholesale & retail | 2026 |
| Wheeler & Co Travel Ltd | Administrative & support | 2025 |
| Wheeltex Ltd | Wholesale & retail | 2016 |
| White Building Solutions Limited | Construction | 2015 |
| White Ensign Homes Limited | Construction | 2025 |
| White Fountain Limited | Wholesale & retail | 2006 |
| White Gables Court Management Company Limited | Households | 2007 |
| White Recruitment Limited | Administrative & support | 2007 |
| White Rose Kitchens Ltd | Construction | 2007 |
| White Space Innovating Designs Ltd | Construction | 2025 |
| Whitecroft Surveyors Limited | Professional & scientific | 2025 |
| Whitehouse Accounting Bureau Ltd | Professional & scientific | 2008 |
| Whiteley GAS Services Ltd | Construction | 2007 |
| Whites Motor Repairs Limited | Manufacturing | 2012 |
| Whitesand Associates Limited | Professional & scientific | 2011 |
| Whitesand Investments Limited | Financial services | 2023 |
| Whitesand Property Limited | Real estate | 2016 |
| Whitestone Property Services (Southern) Ltd | Construction | 2019 |
| Whitsun Management Ltd | Real estate | 2021 |
| Whittaker Holdings (Southern) Ltd | Financial services | 2024 |
| Whittaker Scaffold Ltd | Construction | 2017 |
| Whittenham Limited | Real estate | 2014 |
| Whitwell Management Limited | Administrative & support | 2011 |
| Whyke Court RTM Company Limited | Hospitality | 2013 |
| Wicked Hygiene Ltd | Administrative & support | 2025 |
| Wickett Advisory Ltd | Professional & scientific | 2023 |
| Wickham Scaffolding Ltd | Construction | 2024 |
| Wickshire Engineering Ltd | Manufacturing | 2002 |
| Wight Bars and Catering Limited | Hospitality | 2025 |
| Wight Cataract and EYE Care Ltd | Wholesale & retail | 2020 |
| Wight Pubs Labour Limited | Hospitality | 2023 |
| Wight Pubs Leasing Limited | Administrative & support | 2023 |
| Wight Pubs Trading Limited | Hospitality | 2023 |
| Wightlink Limited | Transport & logistics | 1972 |
| Wightpay Holdings Ltd | Financial services | 2024 |
| Wightpay Investment Properties Limited | Real estate | 2025 |
| Wightpay Ltd | Financial services | 2020 |
| Wilcodoc Limited | Health & social care | 2008 |
| Wilcur Limited | Professional & scientific | 1994 |
| Wild Botanicals Ltd | Wholesale & retail | 2019 |
| Wild Consultancy Limited | Professional & scientific | 2021 |
| Wild Estates Hampshire Limited | Real estate | 2025 |
| Wild Hopes Limited | Real estate | 2019 |
| Wild Sweet Herb Ltd | Wholesale & retail | 2020 |
| Wild Wonderland Ltd | Arts & recreation | 2018 |
| Wilden Metalworks Ltd | Manufacturing | 2025 |
| Wilderslowe House Limited | Construction | 2019 |
| Wildfire Creation Limited | Administrative & support | 2006 |
| Wildheart HR Limited | Professional & scientific | 2025 |
| Wilkes Motion Limited | Information & communication | 2022 |
| Wilkinson 1 Group Limited | Professional & scientific | 2017 |