| Takadah Ltd | Wholesale & retail | 2024 |
| Tammy Neon Ltd | Information & communication | 2022 |
| Tardra Limited | Construction | 2023 |
| Tarka Meadow Mgmt Company Limited | Households | 2021 |
| Taur Flex Ltd | Administrative & support | 2024 |
| Taurus Kernow Properties Ltd | Real estate | 2023 |
| Taurus Logistics Limited | Other services | 2004 |
| Tax (SW) Ltd | Professional & scientific | 2023 |
| Taylors Tyres Ltd | Wholesale & retail | 2003 |
| Teamrennie Marketing Ltd | Professional & scientific | 2022 |
| TEC Roofing Ltd | Construction | 2021 |
| Tehidy Road Flats Management Company Limited | Households | 2006 |
| TEN Alexandra Road Limited | Real estate | 1999 |
| Tete a Tete Productions Limited | Arts & recreation | 1998 |
| Texture Tapestries Limited | Manufacturing | 2021 |
| That Adhd Woman (Thaw) CIC | Education | 2025 |
| That Consulting Company Limited | Information & communication | 2013 |
| That Indexing Company Ltd | Information & communication | 2021 |
| THE Artisanal Mining Engineer Limited | Professional & scientific | 2016 |
| THE Atlantic Cafe Bar LLP | | 2011 |
| THE Cornish Food Box Company Limited | Wholesale & retail | 2017 |
| THE Cornish Food Company Limited | Wholesale & retail | 2010 |
| THE Cornish Place Ltd | Hospitality | 2021 |
| THE Craft Collective Ltd | Wholesale & retail | 2016 |
| THE Crispy COD Redruth Ltd | Hospitality | 2025 |
| THE Curve Catwalk CIC | Education | 2023 |
| THE Final Walk Ltd | Professional & scientific | 2025 |
| THE Fire Place (Cornwall) Limited | Wholesale & retail | 2009 |
| THE Foot Health Practice Limited | Health & social care | 2002 |
| THE Front Falmouth Limited | Hospitality | 2020 |
| THE Gables Mount Ambrose Property Management Limited | Households | 2022 |
| THE Grow Box CIC | Wholesale & retail | 2025 |
| THE Healthier Bakery Co Limited | Extraterritorial | 2025 |
| THE Heart of a Garden Ltd. | Manufacturing | 2008 |
| THE Heaths (Illogan) Management Limited | Households | 2021 |
| THE Innovation HUT Limited | Professional & scientific | 2021 |
| THE JAM Shack Cornwall Ltd | Hospitality | 2018 |
| THE Lemon Street Gallery Limited | Arts & recreation | 2006 |
| THE Level Collective Limited | Wholesale & retail | 2016 |
| THE Lonely Clown Club Limited | Arts & recreation | 2025 |
| THE Meadery Company Ltd. | Hospitality | 2016 |
| THE Mills Right to Manage Company Limited | Households | 2018 |
| THE Mission House | Other services | 2004 |
| THE Natural Cycle Company Community Interest Company | Education | 2009 |
| THE Old Boys School Residents Association Limited | Professional & scientific | 1988 |
| THE Optoelectronic Manufacturing Corporation (UK) Limited | Manufacturing | 1991 |
| THE Palms (Falmouth) Management Company Limited | Households | 2021 |
| THE Poldice Valley Trust | Health & social care | 1990 |
| THE Process Works Ltd | Information & communication | 1998 |
| THE Property Webb Ltd | Households | 2025 |
| THE Rainbow Multi Academy Trust | Education | 2014 |
| THE Redruth Learning Group Trust | Education | 2013 |
| THE Renal Clinic UK Limited | Health & social care | 2026 |
| THE Rustic Cake Company Limited | Administrative & support | 2015 |
| THE Sewing Studio Ltd | Wholesale & retail | 2014 |
| THE Slipway Management Company (Falmouth) Limited | Households | 2013 |
| THE Spires Property Management Company Limited | Households | 2009 |
| THE Star Inn Vogue Limited | Hospitality | 2022 |
| THE Tech Yoda Limited | Information & communication | 2022 |
| THE Tuning-Shop Ltd | Wholesale & retail | 2012 |
| Thomas SPV Ltd | Professional & scientific | 2025 |
| Threezero Retail Ltd | Wholesale & retail | 2021 |
| Thurstan Hoskin Solicitors LLP | | 2018 |
| Tide and Anchor Counselling Ltd | Extraterritorial | 2025 |
| Tikis Holdings Limited | Financial services | 2026 |
| Tiller and Co Keepsakes Ltd | Manufacturing | 2023 |
| TIM Horam & Sons Transport Training Limited | Education | 2021 |
| TIM Uren Building Contractor Ltd | Construction | 2017 |
| TLK Scaffolding Services Limited | Construction | 2014 |
| Tobias Arkell Engineering Ltd | Professional & scientific | 2023 |
| Tolcarne Limited | Extraterritorial | 2017 |
| Tolgus Mount Management Company Limited | Households | 2017 |
| TOM O'Boyle Designs Limited | Professional & scientific | 2015 |
| Tony Craze Limited | Manufacturing | 2018 |
| Topaz Blue Limited | Wholesale & retail | 2000 |
| Tosa Food Empire UK Limited | Wholesale & retail | 2025 |
| Tourer-Tek Limited | Transport & logistics | 2017 |
| Tower House Property Management Ltd | Real estate | 2018 |
| TP Alarms Ltd | Administrative & support | 2022 |
| TR Mgmt Limited | Extraterritorial | 2021 |
| TR27 Holdings Limited | Financial services | 2026 |
| Traditional Baltic Food Ltd | Wholesale & retail | 2025 |
| Trae Limited | Hospitality | 2022 |
| Training and Consultancy With Runa Ltd | Professional & scientific | 2025 |
| Training Architex LLP | | 2024 |
| Trebletime Ltd | Extraterritorial | 2007 |
| Treebeards Limited | Hospitality | 2018 |
| Treglyn House Management Company Ltd | Professional & scientific | 2013 |
| Tregray Shepherd Huts Limited | Hospitality | 2021 |
| Trehoweth Developments Ltd | Construction | 2025 |
| Trelan Holdings Ltd | Real estate | 2019 |
| Trelan Ltd | Agriculture & fishing | 2023 |
| Treleigh Cornwall Ltd | Hospitality | 2025 |
| Treleigh Holdings Limited | Financial services | 2014 |
| Trelowen MOR Ltd. | Hospitality | 2013 |
| Trescowe Holdings Limited | Manufacturing | 2025 |
| Tretec Limited | Agriculture & fishing | 1987 |
| Trevarrion Management Company Limited | Households | 1995 |
| Trevarth View Management Company Limited | Households | 2018 |
| Trevellas Developments Limited | Construction | 2025 |