| Bude Hire Ltd | Administrative & support | 2016 |
| Build IT SW Ltd | Construction | 2026 |
| Burdon Grange Care Home Limited | Other services | 2012 |
| Bushen Builders Ltd | Construction | 2019 |
| C & R Heating Ltd. | Construction | 2010 |
| C E Avonmouth Turbine Ltd | Energy | 2012 |
| C2 Properties Cornwall Limited | Real estate | 2024 |
| C3 Solutions Limited | Public administration | 2013 |
| Cable Craft Electrical Ltd | Construction | 2023 |
| Calam Storage Limited | Transport & logistics | 2023 |
| Camel Builders Ltd | Construction | 1998 |
| Camel Community Supported Agriculture CIC | Agriculture & fishing | 2011 |
| Camel Glass & Joinery (Holdings) Ltd | Professional & scientific | 2014 |
| Camel Glass & Joinery Limited | Construction | 1989 |
| Camel Rock Ltd | Construction | 2018 |
| Camel SKI School Ltd | Arts & recreation | 2001 |
| Camel Valley Projects Ltd | Administrative & support | 2016 |
| Camelot Castle Hotel Ltd | Professional & scientific | 2000 |
| Camelside (Wadebridge) Limited | Real estate | 1998 |
| Camhayle Cornish Hops Limited | Agriculture & fishing | 2016 |
| Camryn Designs Consulting Limited | Construction | 2021 |
| Camryn Designs Limited | Manufacturing | 1999 |
| Camryn Developments (Higher Ninnis) Ltd | Construction | 2025 |
| Camryn Group Holdings Ltd | Financial services | 2022 |
| Camryn Property Ltd | Real estate | 2022 |
| Carbeile Inn Ltd | Hospitality | 2025 |
| Carnon Commercial Lettings Ltd | Real estate | 2024 |
| Casa Casares Limited | Wholesale & retail | 2022 |
| Casp Property Limited | Construction | 2025 |
| Casperford Limited | Hospitality | 2003 |
| Castle Rock Management Company Limited | Households | 2005 |
| CC Conversions Ltd | Manufacturing | 2011 |
| CC Printing Limited | Manufacturing | 2007 |
| CE Dubbers Turbines Ltd | Energy | 2025 |
| CE Higher Biscovillack Turbine Ltd | Energy | 2025 |
| CE LOW Drumclog Wind Farm Ltd | Energy | 2021 |
| CE Strathaven Ltd | Energy | 2019 |
| CF Evolving Kilburn Ltd | Arts & recreation | 2014 |
| Chase Independent Limited | Administrative & support | 1962 |
| Chester Road Management Company (Newquay) Ltd. | Households | 1999 |
| Chisholm Consultancy Limited | Real estate | 1994 |
| Choose Nature CIC | Education | 2021 |
| Chris Dickens Communications Limited | Professional & scientific | 1995 |
| Christine Margaret Hawken Ltd | Extraterritorial | 2025 |
| Churchtown Cafe LLP | | 2021 |
| Clean Earth Energy Investments Limited | Energy | 2011 |
| Clean Earth Energy Limited | Administrative & support | 2010 |
| Clean Earth Energy Wind Investments Limited | Administrative & support | 2012 |
| Clean Earth Ground Mount PV Limited | Energy | 2015 |
| Clean Earth Holdings 2 Ltd | Administrative & support | 2016 |
| Clean Earth Solar Investments Ltd | Energy | 2015 |
| Clean Earth Wind Turbines Ltd | Energy | 2014 |
| Cleave Cafe Ltd | Hospitality | 2025 |
| Clever Trevor (Cornwall) Ltd | Administrative & support | 2025 |
| Clever Wookie Limited | Professional & scientific | 2011 |
| Cloud Storage & Security Limited | Information & communication | 2018 |
| Cloudtech Accountants Limited | Professional & scientific | 2017 |
| Cloudtech Accounting Limited | Professional & scientific | 2017 |
| Cloudtech Bookkeeping Limited | Professional & scientific | 2017 |
| Coastal Canvas (SW) Ltd | Administrative & support | 2025 |
| Coastal Developments (SW) Ltd | Construction | 2023 |
| Coastal Electrical & Renewable Solutions Ltd | Construction | 2023 |
| Coastal Scandi Limited | Wholesale & retail | 2015 |
| Coastal Spaces Padstow Limited | Wholesale & retail | 2017 |
| Coastal Storage Ltd | Transport & logistics | 2025 |
| Coco and Sophie Limited | Hospitality | 2026 |
| Cocoa Truro Ltd | Hospitality | 2026 |
| Cole Rayment & White Wadebridge Limited | Real estate | 2014 |
| Coley Hill Developments Ltd | Hospitality | 2018 |
| Computaplant (U.K.) Limited | | 1984 |
| Concern Wadebridge | Health & social care | 2014 |
| Copper Beech Grove Construction Limited | Construction | 2008 |
| Copper Beech Grove Mgmtt Co ( NO 1) Ltd | Households | 2017 |
| Copper Beech Retreats Ltd | Real estate | 2019 |
| Cornico Coffee Company Limited | Wholesale & retail | 2011 |
| Cornico Coffee Roasters Ltd | Manufacturing | 2022 |
| Cornish Accountants Ltd | Information & communication | 2023 |
| Cornish Building Company Ltd | Construction | 2012 |
| Cornish Community Market CIC | Extraterritorial | 2023 |
| Cornish Golf Society Ltd | Other services | 2024 |
| Cornish Management Company Ltd | Other services | 2020 |
| Cornish Roofing Company Ltd | Construction | 2010 |
| Cornwall Folk Festival CIC | Arts & recreation | 2015 |
| Cornwall Gymnastics Centre C.I.C. | Arts & recreation | 2019 |
| Cornwall Karting Limited | Arts & recreation | 2010 |
| Cornwall Park's Ltd | Hospitality | 2019 |
| Cornwall Taverns Ltd | Hospitality | 2023 |
| Cornwall Tchc Limited | Administrative & support | 2023 |
| Cornwall Wheel Repairs Ltd | Manufacturing | 2007 |
| Cornwalls Finest Parks Ltd | Hospitality | 2019 |
| Corplay Limited | Arts & recreation | 2026 |
| Cox's Meadow Business Park Ltd | Extraterritorial | 2022 |
| Crealy Turbine Limited | Energy | 2013 |
| Creation Fest Limited | Other services | 2006 |
| Curlew Creek Limited | Real estate | 2020 |
| Cutner Practice Ltd | Health & social care | 2022 |
| Cyberswift Limited | Professional & scientific | 2014 |
| D & L Murray Property Ltd | Real estate | 2026 |
| Daften Die-Casting Limited | Manufacturing | 1960 |
| Danning & Symons (Barnstaple) Limited | Extraterritorial | 2005 |