| Stats Utility Connections Limited | Professional & scientific | 2005 |
| Steamtrack Limited | Professional & scientific | 2003 |
| Stephen C Bloor Ltd | Health & social care | 2003 |
| Steve's Taxis Limited | Transport & logistics | 2017 |
| Stick in the Sand Ltd | Wholesale & retail | 2021 |
| Stockdale Holdings (Helston) Limited | Professional & scientific | 2003 |
| Stonepool Limited | Professional & scientific | 2026 |
| Stopgate Allotments Limited | Real estate | 2009 |
| Struss Developments Limited | Real estate | 2012 |
| Studio Diggory Gordon Ltd | Professional & scientific | 2025 |
| Sula Lifestyle Ltd | Hospitality | 2025 |
| Supasport (South West) Limited | Arts & recreation | 2016 |
| Super Bargains Direct Ltd | Wholesale & retail | 2019 |
| SW Darnell Limited | Agriculture & fishing | 2025 |
| SW Property Developments (Cornwall) Ltd | Agriculture & fishing | 2015 |
| Swallows of Helston Gymnastics Club | Arts & recreation | 2001 |
| Sweet Dreamzzz Limited | Wholesale & retail | 2021 |
| Swes Group Ltd | Construction | 2022 |
| Swift Autobodies Ltd | Wholesale & retail | 2023 |
| Switchback Partners Limited | Professional & scientific | 1998 |
| SWO Autos Ltd | Wholesale & retail | 2021 |
| Syass Developments Limited | Construction | 2016 |
| T J Carpentry & Developments Limited | Construction | 2020 |
| Tactics Internet Limited | Information & communication | 2003 |
| Tamarisk Property Holdings Ltd | Real estate | 2021 |
| Tanith Mckenzie Ltd | Other services | 2021 |
| Tapari Limited | Wholesale & retail | 2017 |
| Taylor-Made Mortgages (Cornwall) Limited | Financial services | 2025 |
| Tempt Limited | Professional & scientific | 2005 |
| Terranomics Limited | Professional & scientific | 2017 |
| THE Alchemy Between Ltd | Professional & scientific | 2018 |
| THE Bookshop in Helston Ltd | Wholesale & retail | 2023 |
| THE Bridal Studio (Cornwall) Limited | Wholesale & retail | 2019 |
| THE Bridal Studio (Helston) Limited | Wholesale & retail | 2025 |
| THE Cement Register Limited | Professional & scientific | 2008 |
| THE Chacking Pisky Ltd | Wholesale & retail | 2024 |
| THE Christian Fair CIC | Administrative & support | 2024 |
| THE Cornish Seaweed Company Limited | Agriculture & fishing | 2015 |
| THE Cornubian Arts and Science Trust | Arts & recreation | 2012 |
| THE Cornwall Lavender Company Ltd | Wholesale & retail | 2018 |
| THE Cornwall PUB Company Ltd | Hospitality | 2011 |
| THE Customs House Gallery Limited | Wholesale & retail | 2017 |
| THE Dolphin Tavern Limited | Hospitality | 2017 |
| THE Floras (Helston) Management Company Limited | Households | 2021 |
| THE Green (SW) Ltd | Hospitality | 2025 |
| THE H.A.L.O. Project SW CIC | Education | 2019 |
| THE House Martin Trust | Other services | 2023 |
| THE JAR Porthleven Ltd | Wholesale & retail | 2023 |
| THE Little Keepsake Company Ltd | Wholesale & retail | 2014 |
| THE Lizard Lamertons Ltd | Hospitality | 2023 |
| THE Lizard Sea Shanty Festival CIC | Arts & recreation | 2025 |
| THE Magnificent Science Company Ltd | Professional & scientific | 2011 |
| THE Mortgage Partnership (SW) Ltd | Financial services | 2017 |
| THE Mussel Company Ltd | Hospitality | 2024 |
| THE NET Loft Cornwall Ltd | Information & communication | 2020 |
| THE Netloft Gym Porthleven Ltd | Arts & recreation | 2026 |
| THE Ocean Agency Ltd | Information & communication | 2022 |
| THE Pet and Equine Company Limited | Wholesale & retail | 2015 |
| THE Rodney Inn Ltd | Hospitality | 2015 |
| THE Rogers Arms Ltd | Hospitality | 2023 |
| THE Spice of Life Therapy Ltd | Health & social care | 2025 |
| THE Traveller's Rest Inn Ltd | Other services | 2018 |
| THE Tuckshop Barbers Ltd | Extraterritorial | 2020 |
| THE Walnut Barn Ltd | Education | 2025 |
| THE Washbowl Ltd | Other services | 2021 |
| THE White Admin Company Ltd | Professional & scientific | 2021 |
| The-Sea Ltd | Hospitality | 2010 |
| Thethomaslawtons Limited | Real estate | 2020 |
| Thomson Technical Solutions Limited | Professional & scientific | 2018 |
| Thorn Construction Ltd | Construction | 2001 |
| Thorpe Marine Inspections Ltd | Professional & scientific | 2019 |
| Tidman&Co Limited | Real estate | 2020 |
| Tidyhive Ltd | Administrative & support | 2025 |
| Tile-Ceramics Ltd | Construction | 2022 |
| Tilley Endurables Limited | Wholesale & retail | 1994 |
| TIM Oliver Produce Ltd | Wholesale & retail | 2012 |
| Timber and Stone Limited | Construction | 2014 |
| TIN Coast Construction Ltd | Construction | 2025 |
| TIN Spirit Ltd | Manufacturing | 2021 |
| TIN Town Chippy Ltd | Hospitality | 2025 |
| TK Armour UK Limited | Manufacturing | 2015 |
| TM Designs Solutions Ltd | Professional & scientific | 2026 |
| TNL Ecom Ltd | Wholesale & retail | 2026 |
| Toddler Sense MID & West Cornwall Limited | Health & social care | 2024 |
| Togarrach Limited | Information & communication | 2021 |
| Tolipo Holdings Limited | Financial services | 2020 |
| Tolipo Limited | Wholesale & retail | 2015 |
| Tolipo Properties Limited | Real estate | 2020 |
| Tolverne Tax Services Ltd | Extraterritorial | 2011 |
| Topey Ltd | Education | 2016 |
| Tori Tori Ltd | Professional & scientific | 2023 |
| Total Control Property Solutions Limited | Extraterritorial | 2023 |
| Total Currency Exchange Ltd | Financial services | 2023 |
| TQI Limited | Education | 2006 |
| Tradeprize Ltd | Wholesale & retail | 2025 |
| Tredanel Electrical Ltd | Construction | 2023 |
| Tredever Property Management Ltd | Hospitality | 2025 |
| Trefusis Limited | Other services | 2009 |
| Tregarrick View (Flats 16 & 17) Freehold Management Company Ltd | Households | 2023 |
| Tregarrick View Owners (Communal Areas) Management Company Limited | Households | 2014 |