| Borelight Limited | Households | 1984 |
| Borough Bakery Management Limited | Households | 2005 |
| Bossiney House Hotel Limited | Hospitality | 2007 |
| Box Centre Limited(The) | Manufacturing | 1980 |
| Boys & Girls Nursery (Croxley Green) Limited | Education | 2011 |
| Boys & Girls Nursery (Rickmansworth) Limited | Education | 2012 |
| Boys & Girls Nursery (Stanmore) Limited | Education | 2008 |
| Boys & Girls Nursery (Watford) Limited | Health & social care | 2007 |
| Boys & Girls Nursery Limited | Education | 2008 |
| Bradley Farming Limited | Agriculture & fishing | 2025 |
| Bradley's Dairy Limited | Extraterritorial | 2005 |
| Brightdeed Property Management Limited | Households | 1989 |
| Brighthouse Electrical Limited | Construction | 2006 |
| Brightsquare Property Management Limited | Households | 1998 |
| Britannia Lanes of Devon Limited | Transport & logistics | 2006 |
| Browning Close Management Company Limited | Households | 2005 |
| BS Engineering Services Limited | Professional & scientific | 2008 |
| Bude and North Cornwall Golf Club,Limited(The) | Arts & recreation | 1902 |
| Bude Club Limited | Extraterritorial | 1939 |
| Bude Haven Recreation Ground | Arts & recreation | 1923 |
| Bude Property Construction Limited | Construction | 2001 |
| Budge's Accountants Ltd. | Professional & scientific | 1997 |
| BUS Stop Trading Limited | Wholesale & retail | 1991 |
| Bygone Aviation Limited | Manufacturing | 2006 |
| C & W Trading Limited | Wholesale & retail | 2003 |
| C. F. Products Limited | | 1989 |
| C.J.K. Ellery (Tiling) Limited | | 1975 |
| C.R Cornish Buildings Limited | Construction | 2004 |
| Cadgwith Health Ltd | Information & communication | 2015 |
| Camel Vale Motor Club Limited | Administrative & support | 1976 |
| Camelford & District Constitutional Club Limited | Real estate | 1927 |
| Cannop Limited | Financial services | 1973 |
| Cape Creative & Digital Ltd | Professional & scientific | 2019 |
| Car Radio Fitting Specialists Limited | Arts & recreation | 1979 |
| Car Vogue Limited | Wholesale & retail | 1959 |
| Carn Minerals Limited | Mining & quarrying | 2026 |
| Carnon Valley Transport Limited | Water & waste | 1973 |
| Castle Home Loans Limited | Information & communication | 2002 |
| Cemon Homeopathics Limited | Manufacturing | 2006 |
| Cevans Tattoo Ltd | Other services | 2024 |
| CG Sports Ltd | Wholesale & retail | 2007 |
| Chadelec Limited | Construction | 2005 |
| Chadmarks Limited | Real estate | 1988 |
| Champion Swan Ltd | Professional & scientific | 2022 |
| Chapel Mews (ST Columb Major) Management Company Limited | Professional & scientific | 2006 |
| Chequer Trees Management Company Limited | Households | 2006 |
| Chesterton Place Limited | Households | 1964 |
| Chilcott Plant Hire Ltd | Agriculture & fishing | 2001 |
| Christophers Estate Agents Limited | Real estate | 2005 |
| Chrome Heart Productions Ltd | Arts & recreation | 2026 |
| Chymes Limited | Administrative & support | 2003 |
| Chymorvah House Christian Hotel | Hospitality | 2011 |
| Clarks Consultancy Ltd | Professional & scientific | 2011 |
| Clarks Property Holdings Ltd | Real estate | 2020 |
| Clipper Construction Limited | Construction | 2006 |
| Clive Singleton Transport Limited | Transport & logistics | 2002 |
| Colab Surf Industries Ltd | Manufacturing | 2024 |
| Colin Wilton Heating & Plumbing Ltd | Construction | 2006 |
| Colwall Hotel (Ledbury) Limited | | 1976 |
| Compu-K (Cornwall) Limited | Information & communication | 2003 |
| Condy & Hooper Limited | Construction | 2005 |
| Contact Shirts Limited | Manufacturing | 1987 |
| Container Group Buying Limited | Professional & scientific | 1997 |
| Coombe Services Limited | Financial services | 1990 |
| Copper Beech Mews Management Co Ltd | Households | 2024 |
| Copplestone (SW) Limited | Professional & scientific | 2007 |
| Corner House (Padstow) Limited | Hospitality | 1972 |
| Cornish Collection Limited | Hospitality | 2003 |
| Cornish Cottages Ltd | Real estate | 2003 |
| Cornish Heer Limited | Wholesale & retail | 2019 |
| Cornish Jatts Limited | Wholesale & retail | 2016 |
| Cornish Lithium G5 Limited | Mining & quarrying | 2020 |
| Cornish Lithium Geothermal Limited | Mining & quarrying | 2021 |
| Cornish Lithium Hard Rock Limited | Mining & quarrying | 2021 |
| Cornish Lithium Land Holdings Limited | Agriculture & fishing | 2021 |
| Cornish Organics Limited | Wholesale & retail | 2005 |
| Cornish Stone Walling Limited | Construction | 2004 |
| Cornovia Tree Services Limited | Agriculture & fishing | 2001 |
| Cornwall Bungalow Ltd | Construction | 2019 |
| Cornwall Canine Centre Ltd | Wholesale & retail | 2022 |
| Cornwall Chinese Ltd | Hospitality | 2021 |
| Cornwall House Developments Limited | Construction | 2000 |
| Cornwall House Management & Maintenance Company Limited | Households | 2000 |
| Cornwall Music Service Trust | Education | 2014 |
| Cornwall Renovation Specialists Limited | Construction | 2007 |
| Cottage Developments (South West) Limited | Construction | 2003 |
| Cottage Developments (SW) Limited | Construction | 1998 |
| Cottage Heating Limited | Manufacturing | 2007 |
| Country Cottages (Cornwall) Limited | Real estate | 2004 |
| Country Store Health Food Limited | Wholesale & retail | 2002 |
| County Confectionery Limited | Manufacturing | 1988 |
| Coverack Harbour Company Limited | Transport & logistics | 1920 |
| CP Developments (Cornwall) Limited | Construction | 2002 |
| Crantock Bay Hotel Limited | Hospitality | 1961 |
| Crinnicks Hill Management Limited | Hospitality | 2005 |
| Croatia Marine Leisure Ltd | Construction | 2007 |
| Cross Estates Limited | Real estate | 2000 |
| Crown Road (Whitemoor) Management Company Limited | Real estate | 2006 |
| Crowndell Consulting Limited | Hospitality | 1999 |
| Crust Limited | Professional & scientific | 1995 |