| VTO Ltd | Administrative & support | 2022 |
| Vulcan Security Ltd | Administrative & support | 2025 |
| Vuro Ltd | Construction | 2006 |
| VW Taxation Ltd | Professional & scientific | 2011 |
| Vyato Limited | Information & communication | 2018 |
| Vybrah Ltd | Health & social care | 2025 |
| W & L Projects Ltd | Construction | 2026 |
| W G Wilson & Sons Builders Limited | Construction | 2007 |
| W J Heard Motor Repairs Limited | Wholesale & retail | 2012 |
| W P Jeram (Portsmouth) Limited | Construction | 2003 |
| W W Flooring & Building Services Ltd | Construction | 2018 |
| W.D.R Plastering Limited | Construction | 2016 |
| W2 Electrical Limited | Construction | 2026 |
| Wabo Enterprise Gadgets and Solutions Limited | Wholesale & retail | 2013 |
| Wack BAT Ltd | Manufacturing | 2018 |
| Waddle TOK Ltd | Arts & recreation | 2024 |
| Waffle Studio Ltd | Information & communication | 2022 |
| Waigo Limited | Real estate | 2010 |
| Waika Ltd | Wholesale & retail | 2023 |
| Waitdeem Limited | Professional & scientific | 1983 |
| Wake Properties Limited | Real estate | 2006 |
| Walford Homes Limited | Real estate | 2013 |
| Walker Electrical Services (Portsmouth) Limited | Extraterritorial | 2001 |
| Walker Electrical Services (UK) Limited | Construction | 1993 |
| Walkley Loft Conversions Ltd | Construction | 2024 |
| WALL2WALL Construction Limited | Construction | 2018 |
| Wallace & Wallace Consulting Ltd | Construction | 2014 |
| Wallfast Limited | Construction | 1985 |
| Wallis Brown Consultants Limited | Professional & scientific | 2022 |
| Walls Support Services Limited | Transport & logistics | 2016 |
| Walsh Employment Limited | Administrative & support | 2010 |
| Waltham Restaurant Ltd | Hospitality | 2014 |
| Wanbito Properties Limited | Real estate | 2023 |
| Ward and Scott Associates Limited | Administrative & support | 2020 |
| Ward Court Flats Management Company Limited | Households | 1975 |
| Ward Medical Services Ltd | Health & social care | 2020 |
| Wards Property Developments (South) Limited | Real estate | 2026 |
| Wardsdiving Limited | Construction | 2026 |
| Warehouse Safety Solutions Limited | Extraterritorial | 2021 |
| Warm 'N' DRY Limited | Wholesale & retail | 2016 |
| Warm Homes Plan Ltd | Professional & scientific | 2025 |
| Warm Step Limited | Wholesale & retail | 2025 |
| Warmley Aviation Ltd | Administrative & support | 2022 |
| Warren Mechanical Services Ltd | Wholesale & retail | 2008 |
| Warrior Business Centre Management Company Limited(The) | Real estate | 1986 |
| Warrior Preservation Trust Limited | Arts & recreation | 1968 |
| Warrior Southern Commercials Limited | Wholesale & retail | 2024 |
| Wash 'N' Go Laundrette Ltd | Other services | 2025 |
| Washington Avenue Limited | Real estate | 2016 |
| Wassay Real Estate Ltd | Real estate | 2022 |
| Waste Management Systems Limited | Other services | 2002 |
| Watch Gems Limited | Manufacturing | 1986 |
| Watchbell Group Limited | Real estate | 2025 |
| Watchbell Lettings Limited | Financial services | 2026 |
| Watchtec Limited | Other services | 2024 |
| Water Garden Limited | Wholesale & retail | 1999 |
| Waterfield and Stanford Limited | Real estate | 1996 |
| Waterfront Estates Limited | Administrative & support | 2008 |
| Waterloo Plumbers Ltd | Construction | 2025 |
| Waterlooville Fruit & VEG Limited | Wholesale & retail | 2021 |
| Waterlooville Golfers Limited | Arts & recreation | 1965 |
| Waterlooville Signs Limited | Manufacturing | 2003 |
| Watermelon Homes Investment Ltd | Real estate | 2023 |
| Watermelon Homes Ltd | Real estate | 2020 |
| Watersafe Solutions Limited | Construction | 2026 |
| Waterside Properties Direct Ltd | Real estate | 2006 |
| Watertight Pipework Limited | Construction | 2001 |
| Watson Farm Equine Ltd | Agriculture & fishing | 2011 |
| Watson International Consulting Limited | Information & communication | 2025 |
| Watsons Motor Repairs Limited | Wholesale & retail | 2024 |
| Wave Associates Marketing Limited | Professional & scientific | 2002 |
| Wave Interactive Limited | Manufacturing | 2017 |
| Wavebase Ltd | Professional & scientific | 2019 |
| Waverley Consulting Ltd | Professional & scientific | 2021 |
| Wayside Commercial Properties Limited | Real estate | 2025 |
| WC Photography Ltd | Professional & scientific | 2026 |
| WCF Group Ltd | Administrative & support | 2018 |
| WCM Mechanical & Electrical Services Ltd | Professional & scientific | 2016 |
| WCS 2 Ltd | Construction | 2025 |
| WDH Romsey Limited | Real estate | 2025 |
| WDH Steep Limited | Construction | 2025 |
| WDH West Wellow Limited | Construction | 2024 |
| WE ARE Hummingbird Health Ltd | Health & social care | 2018 |
| WE ARE Jungle Ltd | Information & communication | 2025 |
| WE ARE Plnge CIC | Arts & recreation | 2025 |
| WE ARE Primus Ltd | Administrative & support | 2023 |
| WE ARE the Clique Limited | Professional & scientific | 2016 |
| WE ARE the Noise Ltd | Professional & scientific | 2019 |
| WE Best Ltd | Wholesale & retail | 2016 |
| WE Make Badges Ltd | Extraterritorial | 2014 |
| WE Make Dreams TII Ltd | Information & communication | 2025 |
| WE Snag Ltd | Other services | 2018 |
| We'Ll Handle IT Limited | Administrative & support | 2019 |
| Web Traffic Optimisation Ltd | Professional & scientific | 2017 |
| Webrest Solutions Limited | Information & communication | 2026 |
| Websiteonsubscriptions Limited | Professional & scientific | 2026 |
| Webster Smith Acquisitions Ltd | Administrative & support | 2025 |
| Webtraffico Ltd | Information & communication | 2017 |
| Webvigga Limited | Information & communication | 2015 |
| Wecreateuk Ltd | Arts & recreation | 2018 |