| THC & Sons Ltd | Construction | 2016 |
| THE Awakening Centre Ltd | Administrative & support | 2023 |
| THE Beeches (Launceston) Property Management Limited | Households | 2011 |
| THE Biodiversity Protocol Limited | Extraterritorial | 2017 |
| THE Bluebell Estate Ltd | Real estate | 2022 |
| THE Bull PEN Soft Play Limited | Other services | 2025 |
| THE Caradon Co-Operative Educational Trust | Education | 2012 |
| THE Claremont Hotel (Polperro) Limited | Hospitality | 2020 |
| THE Cornish Cheese Company Limited | Manufacturing | 2000 |
| THE Croust HUT Ltd | Hospitality | 2017 |
| THE Cumbrian Tea and Cumbrian Coffee Co Ltd | Wholesale & retail | 2023 |
| THE D&G Portfolio Limited | Real estate | 2013 |
| THE Downs 1976 Limited | Extraterritorial | 2014 |
| THE Executive Pharm Ltd | Administrative & support | 2021 |
| THE Guild of Celebrants Ltd | Extraterritorial | 2015 |
| THE Guild of Cornish Celebrants Ltd | Other services | 2014 |
| THE Health Advantage Ltd | Health & social care | 2020 |
| THE Heatexchanger Workshop Ltd | Manufacturing | 2022 |
| THE Ideal British Babyfood Company Limited | Wholesale & retail | 2014 |
| THE Immaculate Group SW Ltd | Administrative & support | 2019 |
| THE IOS Store Limited | Other services | 2013 |
| THE Lawn Ranger South West Limited | Administrative & support | 2015 |
| THE Liskeard Community Co-Operative Learning Trust | Education | 2011 |
| THE Little Cornish Play Village Ltd | Education | 2022 |
| THE Paddock Collective Ltd | Manufacturing | 2026 |
| THE Quay KB Management Co Ltd | Households | 2026 |
| THE Sandwich Bar (Looe) Limited | Hospitality | 2019 |
| THE Snug Beauty Room Ltd | Other services | 2026 |
| THE UK Negotiator Limited | Administrative & support | 2016 |
| THE Well House Liskeard Limited | Hospitality | 2007 |
| Think Hygiene Limited | Water & waste | 2009 |
| This and That LJ Ltd | Wholesale & retail | 2025 |
| TIM Olver Planthire & Groundworks Ltd | Construction | 2003 |
| Timarie Homes Limited | Construction | 2009 |
| Timberlee Close Management Company Limited | Real estate | 2018 |
| Timothy John Hanglin Limited | Extraterritorial | 2025 |
| TK Leisure Limited | Hospitality | 2025 |
| TLR Music Ventures Ltd | Information & communication | 2025 |
| TMW Inspections Ltd | Professional & scientific | 2021 |
| Toddle and BE Ltd | Wholesale & retail | 2022 |
| TOM Montero Plumbing and Heating Limited | Construction | 2019 |
| Toobad Ltd | Professional & scientific | 2014 |
| Top Drawer Consultancy Limited | Hospitality | 2016 |
| Torr Farm Ltd | Agriculture & fishing | 2013 |
| Torridge View (Bideford) Management Company Limited | Households | 2013 |
| Totally Blasted Limited | Administrative & support | 2018 |
| Tout Holdings Limited | Real estate | 2023 |
| TPP Carpentry Ltd | Construction | 2017 |
| Traditional Granite (Cornwall) Limited | Mining & quarrying | 2026 |
| Trago Mills (Contracts) Limited | Wholesale & retail | 2006 |
| Trago Mills (Falmouth) Limited | Wholesale & retail | 1976 |
| Trago Mills (Merthyr) Limited | Wholesale & retail | 2017 |
| Trago Mills (South Devon) Limited | Wholesale & retail | 1967 |
| Trago Mills Limited | Wholesale & retail | 1959 |
| Tredinnick Farms Limited | Agriculture & fishing | 2010 |
| Tree Surveys Ltd | Professional & scientific | 2015 |
| Trefanny Management Company Limited | Households | 2016 |
| Tregarrick Management Company Limited | Households | 2000 |
| Trehunsey Consulting Ltd | Professional & scientific | 2026 |
| Trelowen Manor Ltd | Health & social care | 2011 |
| Tremeddan Management Company Limited | Households | 1985 |
| Treskillard Holdings Limited | Financial services | 2020 |
| Trethawle Luxury Holidays Ltd | Hospitality | 2020 |
| Trethawle Renewables Ltd | Energy | 2012 |
| Trethew Tyres and Motor Services Limited | Wholesale & retail | 2021 |
| Tretraining Ltd | Public administration | 2020 |
| Trevalon Limited | Agriculture & fishing | 2015 |
| Trevartha Farm Limited | Real estate | 2013 |
| Trevecca Garage & MOT Centre Ltd | Wholesale & retail | 2023 |
| Treworgey LLP | | 2023 |
| Treworyan Limited | Real estate | 2019 |
| Trinity Base Ltd | Health & social care | 2026 |
| Trivétt Studios CIC | Education | 2025 |
| Trojan Paving Limited | Construction | 2006 |
| Trowbridges Estate and Lettings Limited | Real estate | 2018 |
| Trpltrends Ltd | Wholesale & retail | 2022 |
| TSK Ltd | Construction | 2018 |
| Turnpike Solutions (Southwest) Limited | Real estate | 2021 |
| TWF International Limited | Wholesale & retail | 2004 |
| Twisted Loaf Ltd | Hospitality | 2012 |
| Two Pheonix Heating and Plumbing Limited | Construction | 2024 |
| Tyringham Right Hand Management Limited | Professional & scientific | 2006 |
| Tytl Ltd | Arts & recreation | 2023 |
| Ucomp Limited | | 1987 |
| UFS - Tulip Adapt Ltd | Construction | 2018 |
| Ugalde & SON Limited | Other services | 2007 |
| Universal Holdings SW Ltd | Real estate | 2024 |
| Upper Hendre Holdings Limited | Professional & scientific | 2023 |
| UX First Ltd. | Wholesale & retail | 2021 |
| Valken Homes Ltd | Real estate | 2023 |
| Valley View Garage & Tyre Centre Ltd | Wholesale & retail | 2020 |
| Vans and Bitz Ltd | Manufacturing | 2025 |
| Vbnow Limited | Information & communication | 2018 |
| Veris Cards Limited | Wholesale & retail | 2026 |
| Vespa Consulting Ltd | Information & communication | 2012 |
| Vine Pharmaceuticals Limited | Wholesale & retail | 2014 |
| Vizion Build Limited | Financial services | 2020 |
| Vizion Interiors Limited | Construction | 2015 |
| W M Gregory Construction Limited | Construction | 2011 |
| W3D Limited | Information & communication | 2024 |