| Thesevendaytailor CIC | Wholesale & retail | 2025 |
| Threads Design Ltd | Wholesale & retail | 2009 |
| Threeeighteight Ltd | Hospitality | 2026 |
| Tidal Diamond Limited | Other services | 2003 |
| Tides Reach Polzeath Limited | Hospitality | 2003 |
| Timberland Joinery SW Ltd | Manufacturing | 2026 |
| Times Past Limited | Hospitality | 2018 |
| Timothy Dart Limited | Professional & scientific | 2011 |
| Tinkering Around With Cars Ltd | Wholesale & retail | 2018 |
| Tintagel Carnival Limited | Arts & recreation | 2010 |
| Tiny Tots Ltd | Education | 2013 |
| TJK Haulage Limited | Transport & logistics | 2015 |
| TJK Holdings 2010 Limited | Transport & logistics | 2010 |
| TJK Limited | Arts & recreation | 2013 |
| Top Aviation Services Limited | Transport & logistics | 2019 |
| TOR Technical Services Ltd | Professional & scientific | 2019 |
| Totnes Farm Limited | Construction | 2020 |
| TPW Uglow Ltd | Agriculture & fishing | 2021 |
| TR Goldstar Ltd | Administrative & support | 2020 |
| Trans-Waste (SW) Limited | Water & waste | 2005 |
| TRE, POL & PEN Ltd | Wholesale & retail | 2021 |
| Tree House Homes Ltd | Real estate | 2016 |
| Tregeare Estates Limited | Administrative & support | 2021 |
| Tregida Limited | Wholesale & retail | 2010 |
| Treglasta Farms Ltd | Agriculture & fishing | 2022 |
| Treguddick Botanicals Limited | Agriculture & fishing | 2025 |
| Treguddick Limited | Manufacturing | 2020 |
| Trekennick Surveys Ltd. | Information & communication | 1998 |
| Trelaske Barton Property Management Ltd | Households | 2025 |
| Trelaske Ltd | Hospitality | 2023 |
| Trelonk Limited | Manufacturing | 2018 |
| Tremeale Barns Management Limited | Households | 2009 |
| Trendspot Limited | Professional & scientific | 2010 |
| Trevillian Renewable Energy Ltd | Energy | 2013 |
| Trewinnow Court Management Company Limited | Households | 2020 |
| Trewithen Farm Glamping Ltd | Hospitality | 2021 |
| TRI Better Ltd | Education | 2022 |
| Triple D Construction Limited | Construction | 2018 |
| Triskele Consulting Ltd | Information & communication | 2018 |
| TS (SW) Properties Ltd | Real estate | 2023 |
| Tube & Wire Processing Ltd. | Manufacturing | 2025 |
| TVK Conveyancing Limited | Professional & scientific | 2023 |
| Twice BUT Nice Launceston Ltd | Wholesale & retail | 2025 |
| Tybesta Ltd | Professional & scientific | 2018 |
| Tyre and Wheel Services Limited | Wholesale & retail | 2015 |
| U-Cool Limited | Administrative & support | 2012 |
| U-Kool Limited | Administrative & support | 2019 |
| Unique Mobility Ltd | Wholesale & retail | 2002 |
| Universal Life Church Ltd | Information & communication | 2023 |
| Upcott Cross Farm Ltd | Agriculture & fishing | 2025 |
| V Learning Network, Trading AS Step Into Learning Ltd | Education | 2001 |
| Valenti Consulting Ltd | Professional & scientific | 2024 |
| Vallis Developments Limited | Construction | 2014 |
| Venturecode Limited | Information & communication | 1995 |
| Venue Accounts Ltd | Administrative & support | 2021 |
| View Property Limited | Extraterritorial | 2016 |
| Vivace Health PR Ltd | Professional & scientific | 2013 |
| W.J. Watkins & SON Limited | Agriculture & fishing | 1976 |
| W.J.Gable Limited | Real estate | 1971 |
| W.K.Precision Ltd | Manufacturing | 2016 |
| W.T Scaffolding Ltd | Construction | 2011 |
| Wallis Holdings Limited | Financial services | 2025 |
| Walter Downing Car Sales Ltd | Wholesale & retail | 2002 |
| Warden Technology Services Limited | Information & communication | 2022 |
| Waterfield Nursery Limited | Agriculture & fishing | 2022 |
| Waud Ladieswear Limited | Wholesale & retail | 1998 |
| Weighdecree Limited | Construction | 1996 |
| West Country Grain Marketing Limited | Extraterritorial | 2004 |
| West Country Quality Systems Limited | Information & communication | 2003 |
| West Country Renewables Limited | Energy | 2010 |
| Westcountry Books & Stationery Limited | Wholesale & retail | 1976 |
| Westcountry Conveyors Limited | Manufacturing | 2006 |
| Westcountry Garden Centres Limited | Wholesale & retail | 1992 |
| Westcountry Home Care Limited | Health & social care | 1996 |
| Westcountry Hosting Ltd | Information & communication | 2022 |
| Westcountry Premium Venison Ltd | Manufacturing | 2019 |
| Western Windscreens Ltd | Wholesale & retail | 1998 |
| Westtech Ltd | Information & communication | 2026 |
| Wheal Emma Holdings Limited | Real estate | 2025 |
| White Horse Launceston Limited | Hospitality | 2024 |
| Whitewebbs Ltd | Construction | 2025 |
| Widemouth Takeaway Ltd | Hospitality | 2019 |
| Wiggins & Co RAW Dog Food Ltd | Agriculture & fishing | 2018 |
| Wild Hart Venison Ltd | Agriculture & fishing | 2015 |
| Willford Drylining Limited | Construction | 2024 |
| William Allison Construction Ltd | Construction | 2023 |
| Wills Properties Cornwall Limited | Real estate | 2023 |
| Winstead Group Limited | Construction | 2026 |
| WMD Services Ltd | Construction | 2023 |
| Wolf Valley Motors Ltd | Wholesale & retail | 2026 |
| Women in Safe Homes Feeder Limited Partnership | | 2021 |
| Women in Safe Homes General Partner LLP | | 2020 |
| Women in Safe Homes GP Limited | Other services | 2020 |
| Women in Safe Homes Holding GP Limited | Other services | 2020 |
| Women in Safe Homes Holding LP | | 2020 |
| Women in Safe Homes Limited Partnership | | 2020 |
| Wood ROW Park Limited | Health & social care | 2013 |
| Woodrow Holdings Ltd | Construction | 2019 |
| Woodsfield Management Company Limited | Households | 2020 |
| Woodybrook Gundogs Ltd | Agriculture & fishing | 2020 |