| Simply Works Ltd | Information & communication | 2025 |
| Siren Sound Ltd | Manufacturing | 2025 |
| Sixty East Ltd | Real estate | 2025 |
| SJH Lighting Limited | Arts & recreation | 2015 |
| SKA Scaffolding Ltd | Construction | 2026 |
| Skentel Group Limited | Construction | 2009 |
| Smugglers Amusements Limited | Extraterritorial | 2009 |
| Social Spider Marketing Ltd | Administrative & support | 2023 |
| Solarwatt Ltd | Manufacturing | 2009 |
| Some Grub Ltd | Hospitality | 2021 |
| Sorelle Aesthetics Ltd | Other services | 2023 |
| Soul Kitchen Bodmin Ltd | Hospitality | 2026 |
| South Penquite Farm Limited | Agriculture & fishing | 2017 |
| South West Drains Limited | Administrative & support | 2011 |
| South West Electrics Ltd | Construction | 2016 |
| South West Solar Services Ltd | Construction | 2025 |
| Southcoast Property(Dorset and Hampshire) Limited | Real estate | 2011 |
| Southern Commercial Transmissions Limited | Wholesale & retail | 1999 |
| Southview Drive Management Company Limited | Real estate | 2001 |
| Sovereign Private Finance Limited | Financial services | 2006 |
| Space to Explore Ltd. | Health & social care | 2026 |
| Spanglish Limited | Hospitality | 2018 |
| Spirit Footwear Limited | Wholesale & retail | 2021 |
| Splashdown Design Limited | Professional & scientific | 1984 |
| Sportsmith Limited | Arts & recreation | 2011 |
| Sqrbox (Grasmere) Limited | Construction | 2016 |
| Sqrbox Limited | Construction | 2014 |
| ST Agnes Ices Limited | Hospitality | 2017 |
| ST Barnabas Church of England Multi Academy Trust | Education | 2013 |
| ST George's Apartments Newquay Limited | Households | 2023 |
| ST George's Hotel Limited | Health & social care | 2021 |
| ST Gurons Management Company Limited | Real estate | 2007 |
| ST Mary's Abbey Freehold Limited | Households | 2012 |
| ST Michael's Court (Oakland) Management Company Limited | Households | 2008 |
| ST. Davids Property Company Limited | Households | 1992 |
| Stable Art Limited | Wholesale & retail | 2012 |
| Stable Framing Ltd | Wholesale & retail | 2026 |
| Stables Cardinham Limited | Real estate | 2017 |
| Stamfford Land Developments Limited | Real estate | 2004 |
| Stargazy Solutions Limited | Professional & scientific | 2023 |
| Staverton Holdings Limited | Real estate | 1992 |
| Steadfast Homes (South West) Limited | Construction | 2022 |
| Stephen Lambert Limited | Administrative & support | 2002 |
| Steven Hosken Building Ltd | Construction | 2014 |
| Stirling Asset Group Ltd | Professional & scientific | 2022 |
| Storyx Limited | Information & communication | 2022 |
| STR Trades Ltd | Construction | 2019 |
| Strategy Wealth UK Ltd | Financial services | 2023 |
| Strawberry Day Care Limited | Education | 2012 |
| Stuart Wheeler Roofing Ltd | Construction | 2017 |
| Sunshine Irish Limited | Wholesale & retail | 2026 |
| Supertag Ltd | Manufacturing | 2021 |
| Sutton Plumbing Solutions Ltd | Construction | 2018 |
| SW EC Property Management Ltd | Administrative & support | 2024 |
| SW Ocean Cars Limited | Wholesale & retail | 2023 |
| Sykes Controls Limited | Manufacturing | 2011 |
| T & E Autolec Ltd | Wholesale & retail | 2022 |
| T & H Lobb Limited | Manufacturing | 2010 |
| T and L Properties Cornwall Ltd | Construction | 2021 |
| T J W Carpentry Ltd | Construction | 2015 |
| Take a Fence Limited | Manufacturing | 2025 |
| Talbot Apartments Limited | Households | 2016 |
| Talismead Management Company Limited | Households | 1993 |
| Tamar Trading Co.Limited | Wholesale & retail | 1959 |
| Taste of Portugal Ltd | Wholesale & retail | 2020 |
| Tawna Downs Company Limited | Real estate | 1999 |
| Taylor Capital Limited | Households | 2018 |
| Taylors Trading Co. Ltd | Transport & logistics | 2005 |
| TCB Electrical Services Ltd | Construction | 2023 |
| TCH Cleaning Services Ltd | Administrative & support | 2023 |
| TD Pengelly Hard Landscapes Limited | Administrative & support | 2021 |
| Tech Repair Services Ltd | Other services | 2020 |
| Technical GAS Services Limited | Construction | 2008 |
| Technocon Pharma, Food & Beverage Ltd | Other services | 2019 |
| TEG Design Limited | Professional & scientific | 2026 |
| Terra Firma (RE) Limited | Construction | 1999 |
| Tessa Matthew Limited | Other services | 2019 |
| TF Grills Limited | Construction | 2020 |
| THB Projects Ltd | Professional & scientific | 2023 |
| THE Accommodation Bureau (South West) Limited | Real estate | 2004 |
| THE Accountancy & Tax Centre Ltd | Professional & scientific | 2026 |
| THE Admiral Boscarn Limited | Hospitality | 1976 |
| THE Aligned Coaching Co Ltd | Administrative & support | 2025 |
| THE Beach House (Porth) Management Company Limited | Households | 2006 |
| THE Camping Field Ltd | Hospitality | 2022 |
| THE Chough Bakery (Padstow) Limited | Wholesale & retail | 2015 |
| THE Cormorant Golant Management Company Ltd | Households | 2021 |
| THE Cornish KOI Company Ltd | Agriculture & fishing | 2023 |
| THE Double Push C.I.C. | Health & social care | 2026 |
| THE Dunes Perranporth Limited | Households | 2020 |
| THE Fairways Management (Lanhydrock) Limited | Households | 2005 |
| THE Garland OX Ltd | Hospitality | 2018 |
| THE Generator Sales and Servicing Company Limited | Wholesale & retail | 2016 |
| THE Grain Sandblasted Wooden Signs & Graphics Limited | Manufacturing | 2003 |
| THE Hameer Faqeer Limited | Health & social care | 2025 |
| THE Harbour Brewing Company Limited | Manufacturing | 2011 |
| THE Highcliffe Agency Limited | Real estate | 1998 |
| THE Kernow Consortium Limited | Hospitality | 2015 |
| THE Lanhydrock Schools Partnership | Education | 2013 |
| THE Luxury Chalet Book Limited | Real estate | 2014 |