| Blacker Sheep Limited | Manufacturing | 2005 |
| Blacker Yarns Limited | Wholesale & retail | 2019 |
| Blaine Estates Ltd | Real estate | 2020 |
| Blue Boar Antiques Limited | Wholesale & retail | 2023 |
| Blue Chip Body Repair Ltd | Wholesale & retail | 2022 |
| Blue Grey Ltd | Financial services | 2021 |
| Blue Planet.Com Ltd | Information & communication | 2006 |
| Boilers & More Ltd | Construction | 2024 |
| Born in Idea Ltd | Professional & scientific | 2019 |
| Borough Court (Lifton) Management Company Ltd | Households | 2024 |
| Boscastle Rocket Stores Ltd | Hospitality | 2025 |
| Boundy Developments Limited | Real estate | 2023 |
| Bounsalls Court Management Company Limited | Real estate | 1992 |
| Bowden Derra EOT Limited | Professional & scientific | 2024 |
| Bowden Derra Park Limited | Health & social care | 2000 |
| Breakwater Holidays Ltd | Administrative & support | 2019 |
| Bridge Tools Launceston Ltd | Wholesale & retail | 2022 |
| Bridge Valeting Ltd | Wholesale & retail | 2021 |
| Britannia Air Travel Limited | Administrative & support | 2023 |
| Britt Competitions Ltd | Wholesale & retail | 2026 |
| Broad Business Group Limited | Financial services | 2024 |
| Brown Willy Farms Limited | Agriculture & fishing | 2005 |
| Brownbrink Ltd | Construction | 1999 |
| Bude Accommodation Ltd | Administrative & support | 2019 |
| Bunny and OWL Ltd | Hospitality | 2026 |
| Burnt Hill Holdings Ltd | Real estate | 2014 |
| Burr & Knot Ltd | Manufacturing | 2021 |
| Business and Agricultural Finance Ltd | Financial services | 2002 |
| Buyingology Limited | Wholesale & retail | 2025 |
| C & D Flooring Services Limited | Construction | 2016 |
| C F Launceston Limited | Wholesale & retail | 2007 |
| C J R Lewis Limited | Construction | 2018 |
| C J Turf Services Ltd | Administrative & support | 2026 |
| C Keenan General Builder Ltd | Construction | 2025 |
| C R Farriery Ltd | Agriculture & fishing | 2023 |
| Callum’S Social Media Marketing Limited | Administrative & support | 2025 |
| CAM Courier Services Ltd | Transport & logistics | 2019 |
| Cannacure Ltd | Health & social care | 2025 |
| Capital Media Newspapers Limited | Information & communication | 2020 |
| Car & Commercial Services Ltd | Wholesale & retail | 2016 |
| Carnon Downs Garden Centre Limited | Wholesale & retail | 1979 |
| Carpetaway.Co.Uk Ltd | Professional & scientific | 2023 |
| Carroll Carpets & Floor Coverings Ltd | Construction | 2023 |
| Castle & Coast Therapies CIC | Health & social care | 2025 |
| Catalivo Limited | Administrative & support | 2026 |
| CD Strategic Health Ltd | Professional & scientific | 2025 |
| CEC Entertainment Ltd | Arts & recreation | 2023 |
| Century Maritime Limited | Professional & scientific | 2013 |
| Cftr ZOO Trading Ltd | Arts & recreation | 2024 |
| CH Cornwall Limited | Hospitality | 2019 |
| Chapel Drive Management Company Limited | Households | 2019 |
| Chapel Flats Company Limited | Professional & scientific | 2008 |
| Chapel Park Gardens Limited | Professional & scientific | 2008 |
| Character Builders South West Limited | Construction | 2006 |
| Charlie Bean Carpentry Ltd | Manufacturing | 2024 |
| Charlie Bears Holdings Limited | Financial services | 2023 |
| Charlie Bears Limited | Wholesale & retail | 2005 |
| Chemco Southwest Ltd | Wholesale & retail | 2021 |
| CHF Global Home Limited | Wholesale & retail | 2001 |
| Chick & PEA Limited | Hospitality | 2015 |
| Chings Court Management Ltd | Households | 2019 |
| Chubby Chicken Co Ltd | Hospitality | 2012 |
| Chuff'D Ltd | Real estate | 2025 |
| Church Stile Flats (Launceston) Management Company Limited | Households | 2004 |
| Churchmill Engineering Limited | Manufacturing | 2010 |
| Churchtown JWP Limited | Construction | 2024 |
| Churchtown Management Company Ltd | Households | 2025 |
| CHY Kernow Limited | Hospitality | 2010 |
| CHY Kurnow Limited | Real estate | 2010 |
| Cidd Limited | Professional & scientific | 2018 |
| CJ Hirst Holdings Ltd | Real estate | 2026 |
| Clara Futurum Ltd | Professional & scientific | 2021 |
| Classic Escapes Ltd | Administrative & support | 2004 |
| Clayton Research Limited | Health & social care | 2020 |
| Clemo Sound Ltd | Other services | 2008 |
| Cliffords Joinery Limited | Manufacturing | 2009 |
| CM Property Services Ltd | Construction | 2024 |
| CMS Contracts (UK) Limited | Construction | 2019 |
| Coles Developments Limited | Construction | 2020 |
| Colophony Logistics Ltd | Extraterritorial | 2024 |
| Community Land & Finance C.I.C. | Administrative & support | 2008 |
| Community Money Advice Launceston Limited | Health & social care | 2012 |
| Complete Care & Support Ltd | Health & social care | 2018 |
| Connick Renewable Energy Ltd | Energy | 2012 |
| Continal Group Limited | Wholesale & retail | 2000 |
| Continental Stainless Limited | Wholesale & retail | 1995 |
| Contract Plus (SW) Ltd | Transport & logistics | 2015 |
| Controlled Extracts Limited | Professional & scientific | 2022 |
| Controlled Research Limited | Professional & scientific | 2022 |
| Conway Bradley Ltd | Real estate | 2025 |
| Coole Cars Garage Ltd | Wholesale & retail | 2022 |
| Coombeshead Farm Bakery Ltd | Extraterritorial | 2016 |
| Coombeshead Farm Hotel Limited | Hospitality | 2015 |
| Cordec. Ltd | Construction | 2016 |
| Cornish Adventures Ltd | Administrative & support | 2024 |
| Cornish Harbour Company Limited | Financial services | 2021 |
| Cornish Moorland Wines Limited | Manufacturing | 2004 |
| Cornish Natural Spring Water Company Limited | Wholesale & retail | 2000 |
| Cornish Renewable Energy Limited | Energy | 2012 |
| Cornish Tea Company Limited | Energy | 2006 |