| Blackfoot Consulting Ltd | Public administration | 2009 |
| Blades of Green Ltd | Other services | 2005 |
| Blee’S Garage Ltd | Wholesale & retail | 2017 |
| Blue Space Self Storage Ltd | Transport & logistics | 2019 |
| Bluesail Fish Ltd | Wholesale & retail | 2019 |
| Bodmin Marine Steelcraft Limited | | 1986 |
| Body and Beauty Shop With Georgia Ltd | Wholesale & retail | 2023 |
| Bolitho Construction Ltd | Manufacturing | 2019 |
| Bolitho Homes Ltd | Construction | 2022 |
| Bootsandballs Ltd | Wholesale & retail | 2002 |
| Borlase Construction Limited | Construction | 2017 |
| Bowthorpe England Limited | Professional & scientific | 2014 |
| Brambles Management (Liskeard) Ltd | Financial services | 1997 |
| Brand Innovation Limited | Administrative & support | 2004 |
| Bretagne Marine UK Limited | Wholesale & retail | 2002 |
| Brewery Marthus Lockington RTM Company Limited | Households | 2021 |
| Bridge Business Resources Limited | Information & communication | 2013 |
| Bridge Court (Saltash) Management Company Limited | Households | 2005 |
| Bridle & Groom Weddings Ltd | Hospitality | 2020 |
| Browns Barbers Liskeard Ltd | Extraterritorial | 2016 |
| Brumham Limited | Real estate | 2024 |
| Brunel Quay NO. 2 Management Company Limited | Households | 1992 |
| Buds Cafe Limited | Hospitality | 2016 |
| Bumbles B Day Nursery Limited | Health & social care | 2015 |
| Bumbles Day Nursery Limited | Other services | 2003 |
| BW Plant Engineering Limited | Professional & scientific | 2026 |
| BY the Way Properties Ltd | Real estate | 2026 |
| C a Fencing & Groundworks Ltd | Construction | 2020 |
| C G Dominic Ltd | Agriculture & fishing | 2014 |
| C J (South West) Limited | Construction | 2018 |
| C M Architect Limited | Professional & scientific | 2011 |
| C. W. Gubbins Ltd | Construction | 2010 |
| C.A.B. Cornwall | Health & social care | 2002 |
| C360 Group Ltd | Education | 2025 |
| Caduscott Farm Partnership | | 2004 |
| Calum Campbell Construction Limited | Construction | 2023 |
| Camel Valley Properties Limited | Administrative & support | 2004 |
| Cameron Long Partnership Limited | Financial services | 2011 |
| Camerons Cuts Ltd | Other services | 2003 |
| Canicross UK Ltd | Wholesale & retail | 2020 |
| Canicross UK Sales Ltd | Wholesale & retail | 2022 |
| CAP + Stone Limited | Information & communication | 2023 |
| Capitol Cleaning Management Limited | Administrative & support | 1999 |
| Caradon Building Contractors Ltd | Construction | 2014 |
| Caradon Cabs Limited | Transport & logistics | 2001 |
| Caradon Health Group Ltd | Other services | 2026 |
| Caradon Hill Trekking and Equestrian Centre Ltd | Arts & recreation | 2014 |
| Caradon Ltd | Mining & quarrying | 2020 |
| Caradon Medical Communications Ltd | Professional & scientific | 2021 |
| Caradon Tool & Plant Hire Limited | Administrative & support | 1988 |
| Caradon Tyres Limited | Transport & logistics | 2024 |
| Carbon Suckers Media Ltd | Information & communication | 2024 |
| Case Property (SW) Limited | Real estate | 2020 |
| Cassiobury Rare Breeds Farm & Fisheries Limited | Agriculture & fishing | 2026 |
| Castle Air Academy Limited | Transport & logistics | 1991 |
| Castle Air Aviation Group Limited | Transport & logistics | 2019 |
| Castle Air Aviation Parts Limited | Wholesale & retail | 2017 |
| Castle Air Group Limited | Extraterritorial | 1992 |
| Castle Air Limited | Manufacturing | 1996 |
| Castle Keep Launceston RTM Company Limited | Households | 2021 |
| Castle Marine and Aviation Services Limited | Transport & logistics | 1988 |
| Castle Motor Company Limited | Extraterritorial | 2009 |
| Castle Motors (Trebrown) Limited | Wholesale & retail | 1996 |
| Castleman (UK) Ltd | Professional & scientific | 2008 |
| Caunters Solicitors Limited | Extraterritorial | 2008 |
| CAZ & Aowie Developments Ltd | Construction | 2026 |
| CEK Leisure Ltd | Hospitality | 2024 |
| Celtic Lettings Limited | Construction | 2021 |
| Celtic Warriors Wheelchair Rugby Club CIC | Arts & recreation | 2025 |
| Central Chic Limited | Wholesale & retail | 2011 |
| Central Stores Menheniot Ltd | Wholesale & retail | 2016 |
| Champion Groundworks & Construction Ltd | Construction | 2024 |
| Champion Groundworks Limited | Construction | 2012 |
| Champion Scaffolding Limited | Construction | 2018 |
| Champion Training Solutions Limited | Education | 2024 |
| Channel to China Limited | Wholesale & retail | 2016 |
| Chapel Court Liskeard Limited | Households | 2020 |
| Chappell Barrett Limited | Wholesale & retail | 2023 |
| Charlie Louise Publishing Ltd | Information & communication | 2018 |
| Chawatama Rose Enterprises Ltd | Education | 2019 |
| Check Policy Limited | Administrative & support | 2015 |
| Cheesewring Farm Enterprises Limited | Agriculture & fishing | 2014 |
| Chef Steve Limited | Hospitality | 2018 |
| Chequered Flag Motorcycle Sales Ltd | Wholesale & retail | 2021 |
| Cheshire Tea Company Ltd | Wholesale & retail | 2014 |
| Chris Sibley Groundworks Limited | Construction | 2002 |
| Christal Wire Ltd | Administrative & support | 2009 |
| Christian Smith Agriculture Limited | Wholesale & retail | 2003 |
| Chromacon Holdings Limited | Manufacturing | 2019 |
| Church Lane Catering Ltd | Hospitality | 2018 |
| Church of Impact Limited | Health & social care | 2011 |
| Churchtown Kiwi Limited | Professional & scientific | 2013 |
| Chutney Various Film & TV Ltd | Information & communication | 2021 |
| Citek Ltd | Manufacturing | 2025 |
| Civil Engineering Limited | Hospitality | 2000 |
| CJ Trading (South West) Limited | Construction | 2006 |
| CJB Building Contractors Ltd | Construction | 2025 |
| Cladding South West Ltd | Construction | 2019 |
| Cladding SW Limited | Construction | 2018 |
| Clareit Limited | Professional & scientific | 2004 |