| Uali Holding Limited | Information & communication | 2020 |
| UHS Holdings Limited | Financial services | 2023 |
| UHS Property Holdings Limited | Financial services | 2023 |
| UK Light Houses CIC | Education | 2026 |
| UK Pro Surf Association Limited | Arts & recreation | 2007 |
| UK Surf & Skate Expo Ltd | Administrative & support | 2024 |
| UK Tattoo Ltd | Other services | 2015 |
| UNA+ Ltd | Real estate | 2024 |
| Unbranded Golf Co Limited | Wholesale & retail | 2025 |
| Uncy Herbs CBD Ltd | Wholesale & retail | 2026 |
| Unfeasible Ltd | Professional & scientific | 2021 |
| Unique Home Stays Limited | Hospitality | 2002 |
| Unique Home Stays Property- UHS Limited | Hospitality | 2017 |
| Unit Four Pizzeria & Bistro Ltd | Professional & scientific | 2017 |
| United Soulwaves Ltd | Arts & recreation | 2022 |
| Universal Events Cornwall CIC | Hospitality | 2024 |
| Unrivalled Legacy Limited | Wholesale & retail | 2019 |
| Upalong Limited | Professional & scientific | 2022 |
| Upnorth Ltd | Professional & scientific | 1996 |
| Urban Biodiversity CIC | Hospitality | 2014 |
| Usher Property Management Limited | Real estate | 2019 |
| Valera Build Ltd | Construction | 2026 |
| Vanarchy Customs Ltd | Wholesale & retail | 2020 |
| Vector Rope Access UK Limited | Construction | 2016 |
| Venton Limited | Professional & scientific | 2018 |
| Vesta Southwest Ltd | Construction | 2020 |
| Veterans Ventures CIC | Arts & recreation | 2024 |
| Victoria Court Residents Company Limited | Households | 2006 |
| Victoria Restaurant Ltd | Hospitality | 2023 |
| Viewsys Limited | Information & communication | 2004 |
| Vintage Dream Rides Ltd | Transport & logistics | 2024 |
| Virtue Global Limited | Administrative & support | 2025 |
| Volant Procurement Services Ltd | Administrative & support | 2021 |
| Voxmar Ltd | Manufacturing | 2024 |
| W P Williams Ltd | Construction | 2012 |
| W.J.Tamblyn & Sons Limited | | 1958 |
| WAH Hing Cornwall Limited | Hospitality | 2022 |
| Walk in Bathing Company Limited | Extraterritorial | 2014 |
| Wallace Geophysical Limited | Mining & quarrying | 2005 |
| Wander Rings Limited | Wholesale & retail | 2025 |
| Warnock Productions Ltd | Information & communication | 2023 |
| Wartha Farm Mews Management Company Limited | Real estate | 2012 |
| Water and Stone Events Ltd | Other services | 2023 |
| Water Window Limited | Professional & scientific | 2009 |
| Watergate Bay Hotel Limited | Hospitality | 1999 |
| Watergate View Management Company Limited | Households | 2019 |
| Waterhaul Ltd | Manufacturing | 2019 |
| Waters Court Management Company Limited | Real estate | 2003 |
| Watton Ventures Ltd | Wholesale & retail | 2025 |
| Wave & Wander Vans Ltd | Wholesale & retail | 2025 |
| Wave Electrical Solutions Ltd | Construction | 2020 |
| Wave Rock Ltd | Manufacturing | 2019 |
| Waveform Acoustics Limited | Manufacturing | 2025 |
| Wavepool Surf Tour Limited | Information & communication | 2026 |
| Waves Apartments (Newquay) Limited | Households | 2019 |
| WAX Events Co Ltd | Hospitality | 2022 |
| WAX Football Ltd | Hospitality | 2025 |
| Wayfinder Advisory Ltd | Professional & scientific | 2025 |
| Wayline Holdings Ltd | Financial services | 2026 |
| Wayside Court Management Company Limited | Households | 1992 |
| WE ARE the Clarkes Ltd | Professional & scientific | 2014 |
| WE CAN BE Ltd | Education | 2025 |
| Wedge Studio Ltd | Manufacturing | 2021 |
| Weekly Fire Testing Limited | Public administration | 2025 |
| Welchaero Limited | Administrative & support | 2015 |
| Wellness on TAP Ltd | Information & communication | 2025 |
| West Pentire Car Park Limited | Real estate | 2022 |
| Western Staffing Solutions Limited | Construction | 2025 |
| Westpoint Civil Engineering Limited | Construction | 2020 |
| When the Cats Away Limited | Professional & scientific | 2018 |
| Whirly Shop Ltd | Wholesale & retail | 2024 |
| Whiskers Newquay Ltd | Hospitality | 2014 |
| Whitakers (South West) Limited | Professional & scientific | 2013 |
| White Rose Spirits Limited | Wholesale & retail | 2021 |
| Whitecross Homes Limited | Construction | 2026 |
| Whitecross Self Storage Ltd. | Administrative & support | 2018 |
| Whitewater Management Company Limited | Households | 2011 |
| Whitewater RTM Company Limited | Households | 2017 |
| Whitstone House Limited | Agriculture & fishing | 1979 |
| Whittaker Family Holdings Ltd | Administrative & support | 2024 |
| Wibco U.K. Limited | Manufacturing | 1999 |
| Wicksmith Holdings Limited | Health & social care | 2016 |
| Wigglebuddies Ltd | Health & social care | 2025 |
| Wild Path Learning Ltd | Education | 2025 |
| Wild Spaces Limited | Manufacturing | 2023 |
| Wildtribe Limited | Administrative & support | 2016 |
| Willart Investments Ltd | Real estate | 2022 |
| Williams R.P.D Ltd | Construction | 2010 |
| Wilton Family Butchers Limited | Wholesale & retail | 2011 |
| WIN Nails Ltd | Other services | 2026 |
| Wine by Baia Ltd | Wholesale & retail | 2026 |
| Winfield Construction Ltd | Construction | 2023 |
| Winnie and the Wave Ltd | Wholesale & retail | 2024 |
| WIX Electrical Contractors Ltd | Construction | 2015 |
| Women and Waves Ltd | Administrative & support | 2019 |
| Wonder Panic Ltd | Information & communication | 2025 |
| Wood & Tile Construction Ltd | Construction | 2022 |
| Wood Mine Management Company Limited | Households | 2021 |
| Woodhatch Plumbing & Heating Limited | Construction | 2020 |
| Woodland Barton Generation Limited | Professional & scientific | 2016 |