| Trevelyan Project Management Ltd | Professional & scientific | 2019 |
| Trevena Olds Limited | Wholesale & retail | 2025 |
| Trevenson Holdings Ltd | Real estate | 2020 |
| Trevenson Moor Limited | Wholesale & retail | 2018 |
| Trevenson Properties Ltd | Real estate | 2022 |
| Trevenson Road Management Company Ltd | Households | 2014 |
| Trevethan Holdings Limited | Real estate | 2023 |
| Trevince Energy Limited | Energy | 2011 |
| Trevince Estate Limited | Real estate | 2007 |
| Trevince Retail Limited | Wholesale & retail | 2016 |
| Treviskey Construction (SW) Ltd | Construction | 2013 |
| Trevolankan Farm Ltd | Agriculture & fishing | 2019 |
| Trevow Roofing Ltd | Construction | 2025 |
| Trewavus Estate Ltd | Agriculture & fishing | 2024 |
| Treweath Engineering Ltd | Manufacturing | 2015 |
| Trewirgie Junior School | Education | 2011 |
| Trezona Electrical Contractors Limited | Construction | 2012 |
| TRU Stage Ltd | Administrative & support | 2020 |
| Trucru Ltd | Construction | 2013 |
| Trungle Fuego Ltd | Hospitality | 2025 |
| Truro Granite Limited | Wholesale & retail | 2006 |
| Truro Shopwatch Ltd | Wholesale & retail | 2024 |
| Tucker Automotive Ltd | Wholesale & retail | 2025 |
| Turcs Testing and Inspection Ltd | Professional & scientific | 2020 |
| Two Green Magpies Ltd | Professional & scientific | 2019 |
| Two Seas Productions Limited | Information & communication | 2024 |
| UAS Enterprises Limited | Wholesale & retail | 1994 |
| Ukrainian Business Club CIC | Administrative & support | 2025 |
| Unfold Studio Limited | Professional & scientific | 2014 |
| Unify Studio Ltd | Professional & scientific | 2025 |
| Union Audio Limited | Manufacturing | 2014 |
| Unique Analogue Holdings Ltd | Financial services | 2024 |
| Unique AV Designs Limited | Professional & scientific | 2024 |
| Unit Cycles Ltd | Wholesale & retail | 2014 |
| United Downs Geothermal Limited | Construction | 2017 |
| United Downs Lithium Limited | Mining & quarrying | 2022 |
| Upcycle Kernow CIC | Education | 2018 |
| Upholstery Studio Ltd | Transport & logistics | 2016 |
| Urbanistic Tea Limited | Wholesale & retail | 2016 |
| Urlaub Cornwall Limited | Administrative & support | 2012 |
| Urlaub Cornwall Travel Services Ltd | Administrative & support | 2015 |
| User Stream Limited | Information & communication | 2019 |
| V.F.D. Bray Limited | Administrative & support | 2002 |
| V.K Amber Ltd | Transport & logistics | 2024 |
| Vallas Coffee Ltd | Wholesale & retail | 2023 |
| Valley View Cornwall Management Company Limited | Households | 2019 |
| Value Moves Ltd | Transport & logistics | 2023 |
| Vandov Ltd | Construction | 2014 |
| Vanity Fayre (SW) Ltd | Manufacturing | 2014 |
| Vantiro Advisory Ltd | Professional & scientific | 2026 |
| Varcurn Marble Limited | Construction | 2004 |
| VCO Care Services Limited | Health & social care | 2025 |
| Velocity Pressure Washing Ltd | Administrative & support | 2024 |
| Velora VFX Ltd | Professional & scientific | 2025 |
| Vemm Consultants Limited | Professional & scientific | 2024 |
| Verdant Community Energy C.I.C. | Energy | 2015 |
| Veronica Court Management Company Ltd | Households | 2016 |
| Veskproperty Ltd | Real estate | 2025 |
| Vespa Cornwall Ltd | Construction | 2021 |
| Victoria Penrose Makeup Limited | Other services | 2015 |
| Vingoe Family Law (Cornwall) LLP | | 2026 |
| Vintec Automotive Limited | Wholesale & retail | 2019 |
| Virtue Holdings (SW) Ltd | Financial services | 2021 |
| Virtue Holdings (SW) Trustees Limited | Professional & scientific | 2024 |
| Visionary Collectors Limited | Wholesale & retail | 2025 |
| Vital Aspects Ltd | Other services | 2011 |
| Void Red Ltd | Wholesale & retail | 2022 |
| Volumetric Concrete Cornwall Limited | Construction | 2023 |
| VOX Dance Studios Limited | Arts & recreation | 2018 |
| W J Mills (Property) Limited | Construction | 2019 |
| W.J. Ladd (Builders) Limited | Construction | 1973 |
| Wainwright and Sons Limited | Professional & scientific | 2025 |
| Warvena Construction Limited | Construction | 2020 |
| Wascle Limited | Water & waste | 2017 |
| Watergate Technologies Limited | Information & communication | 2006 |
| Watters, Court & Maddern Limited | Administrative & support | 2024 |
| WCF Holdings Limited | Financial services | 2024 |
| Wear-House (Cornwall) Limited | Wholesale & retail | 2021 |
| Wellington Gardens Falmouth Management Company Limited | Households | 2000 |
| Wentworth Close Residents Management Company Limited | Households | 2012 |
| WES Engineering Solutions Limited | Manufacturing | 1990 |
| Weses Limited | Other services | 2006 |
| West Coast Academy CIC | Education | 2019 |
| West Coast Floors Ltd | Construction | 2024 |
| West Cornwall Carpentry Contractors Ltd | Construction | 2019 |
| West Cornwall Carpentry Ltd | Construction | 2022 |
| West Country Lettings Ltd | Real estate | 2020 |
| West Polberro Land Limited | Real estate | 2024 |
| Westaway Developments (Portreath) Limited | Construction | 2006 |
| Westcountry Family Wellness Ltd | Health & social care | 2002 |
| Westcountry Mine Searches Ltd | Administrative & support | 2017 |
| Westcountry Minerals Limited | Mining & quarrying | 2012 |
| Westcountry Mines and Property Surveys Limited | Other services | 2009 |
| Westcountry Mobility Specialists Ltd | Wholesale & retail | 2023 |
| Westcountry Vans Ltd | Wholesale & retail | 2023 |
| Weston GAS Services Limited | Construction | 2018 |
| Westwood Park (Cornwall) Limited | Households | 2011 |
| Wheal KI Groomers Ltd | Other services | 2024 |
| William Ellis & Sons Ltd | Agriculture & fishing | 2020 |
| Williamsons Home Ltd | Wholesale & retail | 2026 |