| Two Waldrons Limited | Real estate | 2020 |
| Twyford School | Education | 1955 |
| Typeweb Limited | Information & communication | 1998 |
| U.K. Research & Development Limited | Professional & scientific | 1983 |
| Uberphon Limited | Wholesale & retail | 2004 |
| UK Extinguisher Services Limited | Manufacturing | 2001 |
| Ukcs (Management) Limited | Education | 2003 |
| Ukmotorsport.Com Limited | Information & communication | 1997 |
| Ultimate Heating Limited | Construction | 2003 |
| Ultimate Plumbing and Heating Limited | Extraterritorial | 1998 |
| Ultrav Ltd | Health & social care | 2020 |
| Unirom Systems Limited | Information & communication | 1993 |
| Unit 8 Limited | Manufacturing | 2000 |
| United Land Limited | Construction | 1988 |
| United Reformed Church (Wessex) Trust Limited(The) | Other services | 1981 |
| Unity Healthcare Recruitment Ltd | Administrative & support | 2017 |
| Universal Publishing Services Limited | Manufacturing | 1988 |
| University of Winchester | Education | 2006 |
| UP Above Studios Limited | Arts & recreation | 2004 |
| UPS Translations Limited | Extraterritorial | 1999 |
| Upton Management Company Limited | Households | 2001 |
| Urban Logistics (UK) Limited | Transport & logistics | 1987 |
| Usual Route Ltd | Extraterritorial | 2002 |
| V Spirits Brands Limited | Manufacturing | 2024 |
| V Spirits Company Limited | Manufacturing | 2019 |
| V-Cut Ltd | Construction | 2003 |
| Valinor Trading Limited | Information & communication | 2007 |
| Vegetarians Choice Limited | Manufacturing | 2002 |
| Velvet Vistra Ltd | Hospitality | 2025 |
| Venture Housing Limited | Real estate | 2001 |
| Vernon Corporation Ltd | Other services | 2012 |
| Versita Limited | Professional & scientific | 2003 |
| VIA Technology Ltd. | Administrative & support | 1986 |
| Vicky Parkinson Design Limited | Wholesale & retail | 2004 |
| Victory Cleaners(Isle-Of-Wight)Limited | Arts & recreation | 1934 |
| Victory Coatings Ltd | Transport & logistics | 2003 |
| Vigilis Limited | Information & communication | 2001 |
| Vigo Accounting Services Ltd. | Professional & scientific | 2003 |
| Villachoice Limited | Real estate | 1973 |
| Vincent Properties Management Co Limited | Real estate | 2015 |
| Vinyls Italia Limited | Professional & scientific | 2006 |
| Violate Clothing Limited | Wholesale & retail | 2007 |
| Viper Leisure Limited | Hospitality | 2007 |
| Visram Limited | Health & social care | 1979 |
| Vistar Construction Limited | Construction | 1998 |
| Visualobjects Limited | Information & communication | 2003 |
| Vitamin C Limited | Professional & scientific | 2007 |
| Vittrum Limited | Hospitality | 2018 |
| Vivian & Holt Limited | Wholesale & retail | 2005 |
| VL Architectural Ironmongery Limited | Construction | 2005 |
| Voltage Controlled Software Ltd | Information & communication | 2005 |
| W.A. Birch and SON (Horton Heath) Limited | | 1979 |
| WAI Ling Limited | Hospitality | 2019 |
| Waldron Limited | Construction | 1980 |
| Walker and Way Limited | Professional & scientific | 2005 |
| Walker Sound Limited | Administrative & support | 1999 |
| Walrus Carpentry Limited | Construction | 2004 |
| Waltham Park Management Company Limited | Real estate | 2000 |
| Watercress Line Heritage Railway Trust Limited | Transport & logistics | 1973 |
| Watershed Creative Limited | Administrative & support | 2004 |
| Waterside Breaks Limited | Administrative & support | 2006 |
| Waterways Holidays Limited | Information & communication | 2003 |
| Watford (T) Hairdressing Limited | Other services | 2023 |
| Wavecrest Associates Limited | Mining & quarrying | 2002 |
| Waverley Building Consultants Limited | Wholesale & retail | 1981 |
| Waymaster Limited | Professional & scientific | 1973 |
| Wayne Rumsey Limited | Professional & scientific | 2002 |
| WE Will Arrange IT Limited | Real estate | 1987 |
| Wealthwise Financial Services Limited | Financial services | 2004 |
| Webbs Forest Furniture Limited | Manufacturing | 2003 |
| Weizhiyuan Limited | Hospitality | 2024 |
| Welfare Medical Limited | Professional & scientific | 2005 |
| Wellbound Plus Ltd | Other services | 2025 |
| Wellington Estates Developments 2 Limited | Construction | 2025 |
| Wellington Estates Developments Holdings Limited | Construction | 2025 |
| Wellington Estates Developments Limited | Construction | 2025 |
| Wellow Golf Club Limited | Arts & recreation | 1991 |
| Wesali Limited | Information & communication | 2019 |
| Wessex Company Secretaries Limited | Extraterritorial | 1994 |
| Wessex Homes Development Limited | Extraterritorial | 1999 |
| West Heath Residents Company Limited | Households | 1983 |
| West Stoke Village Hall Limited | Administrative & support | 2006 |
| Westland Motors (Southampton) Limited | Wholesale & retail | 1997 |
| Weston Building Services (Gosport) Limited | Wholesale & retail | 1988 |
| Westonmead Grange Management Company Limited | Households | 2026 |
| Westwood Court M.C. Limited | Real estate | 1988 |
| WEY Valley Aeronautics Ltd. | Professional & scientific | 1999 |
| Weybrook Park Golf Club Limited | Arts & recreation | 1992 |
| Weyhill Horse Transport Limited | Transport & logistics | 1987 |
| Weymouth Yacht Haven Limited | Professional & scientific | 2005 |
| Whatever YOU Like Limited | Administrative & support | 2007 |
| Wheatlands Avenue Hayling Island Flat Owners Limited | Households | 1987 |
| Wheelgame Limited | Wholesale & retail | 1980 |
| Whirlwind Energy Limited | Information & communication | 2002 |
| Whitchurch Silk Mill (Trading) Limited | Manufacturing | 1985 |
| Whitchurch Silk Mill Trust | Manufacturing | 1990 |
| White Knight Electrical Contractors Ltd | Construction | 2020 |
| White Rose Petersfield Limited | Wholesale & retail | 2000 |
| Whiteman Construction (I.W.) Limited | Wholesale & retail | 1990 |
| Whitestone Capital Financial Planning Ltd | Professional & scientific | 2025 |