| THE Little Ice Cream Shop Ltd | Wholesale & retail | 2023 |
| THE Meadows Campsite Limited | Hospitality | 2017 |
| THE Millham Group Limited | Financial services | 2021 |
| THE Old Mill Lerryn Limited | Households | 1996 |
| THE Pares Organisation Limited | Extraterritorial | 2022 |
| THE Station ST Austell Limited | Hospitality | 2024 |
| THE Wolf Centre Limited | Arts & recreation | 2008 |
| TIM Whitehead Stonemasons Limited | Construction | 2011 |
| TO the Woods CIC | Education | 2023 |
| Tonley Farm LLP | | 2025 |
| Trecanair Limited | Professional & scientific | 2016 |
| Tredethick Limited | Hospitality | 2011 |
| Treninzo Ltd | Professional & scientific | 2023 |
| Trevest Ltd | Real estate | 2017 |
| Troy Town Gallery Limited | Wholesale & retail | 2020 |
| True Carpentry Team Ltd | Manufacturing | 2021 |
| Trusted Contractors Group Ltd | Construction | 2018 |
| Trusttech Advisory Ltd | Information & communication | 2025 |
| Turps Wood Design Ltd | Manufacturing | 2024 |
| U3 Space CIC | Real estate | 2019 |
| Uzella Marine Limited | Mining & quarrying | 2004 |
| Vectorbridge Limited | Professional & scientific | 2026 |
| Vintage Vinyl and Hifi Ltd | Wholesale & retail | 2022 |
| W. Gough Construction Ltd | Construction | 2017 |
| Walkwilder CIC | Education | 2026 |
| Wendy Delf Education Limited | Professional & scientific | 2016 |
| West Orchid Ltd | Hospitality | 2022 |
| West Park Cornwall Ltd | Hospitality | 2025 |
| Westington Carpentry & Construction Ltd | Construction | 2024 |
| Wildtype Productions Ltd | Information & communication | 2011 |
| Willake Limited | Construction | 2017 |
| Willdig Catering Ltd | Other services | 2025 |
| Willdig Property Cornwall Ltd | Other services | 2023 |
| Wise and Thrive Group Ltd | Financial services | 2023 |
| Wombwell Homes (Lostwithiel) Limited | Construction | 2006 |
| Wombwell Robertson Developments Limited | Construction | 2017 |
| Wood Floors Inc Ltd | Construction | 2023 |
| Woods and Turvey Ltd | Professional & scientific | 2011 |
| Ya-Ya Communications Ltd | Administrative & support | 1995 |