| Bluntrock Venue Holdings Limited | Hospitality | 2025 |
| Bodmin and Wadebridge Railway Company Limited | Transport & logistics | 1992 |
| Bodmin Business Centre Ltd | Real estate | 2023 |
| Bodmin Chamber of Commerce & Industry Ltd | Other services | 2020 |
| Bodmin Garage Limited | Wholesale & retail | 2023 |
| Bodmin Hand Car Wash Ltd | Administrative & support | 2025 |
| Bodmin Hand Wash Ltd | Other services | 2018 |
| Bodmin Investment Property Ltd | Real estate | 2026 |
| Bodmin Jail Hotel Ltd | Construction | 2015 |
| Bodmin Jail Museum Ltd | Hospitality | 2008 |
| Bodmin Lucky House Limited | Hospitality | 2024 |
| Bodmin Nursery Limited | Agriculture & fishing | 2018 |
| Bodmin Railway Heritage Trust | Education | 1987 |
| Bodmin Revival Community Interest Company | Real estate | 2024 |
| Bodmin Spice Limited | Hospitality | 2025 |
| Bodmin Way | Other services | 2018 |
| Bole Cornwall Ltd | Hospitality | 2026 |
| Bore Street Bistro Ltd | Hospitality | 2025 |
| Born With Horns Apparel Ltd | Manufacturing | 2024 |
| Bortons Limited | Construction | 1934 |
| Bosvena Events, Arts and Theatre CIC | Arts & recreation | 2024 |
| Bosvena Health CP Ltd | Wholesale & retail | 2025 |
| Bosvena Homes Limited | Construction | 2022 |
| Bourne Total Management Limited | Professional & scientific | 2012 |
| Bowithick Farms Limited | Extraterritorial | 2000 |
| Bowithick Green Ltd | Energy | 2012 |
| BPF Projects Ltd | Hospitality | 2025 |
| BPM Cornwall Limited | Construction | 2017 |
| BR Trading (Cornwall) Limited | Wholesale & retail | 1985 |
| Branddufour Ltd | Professional & scientific | 2018 |
| Brandon Retrofit Consultancy Ltd | Professional & scientific | 2024 |
| Brave Tales Limited | Education | 2002 |
| Bridge Multi-Academy Trust | Education | 2011 |
| British Warm-Blood Horses Company Limited | Other services | 1986 |
| Broad and Turner Ltd | Manufacturing | 2026 |
| Brown Hawke Holdings Limited | Financial services | 2022 |
| Bugle Way Management Company Limited | Administrative & support | 2017 |
| Building Controls Solutions Limited | Professional & scientific | 2005 |
| Bulbit Ltd | Wholesale & retail | 2014 |
| BUR-BAX-10 Limited | Wholesale & retail | 2017 |
| Burt & VIE Ltd | Transport & logistics | 2023 |
| Business Waterwheel Limited | Professional & scientific | 2026 |
| Buttermilk Confections Limited | Manufacturing | 2002 |
| Buttermilk Holdings Limited | Financial services | 2025 |
| Butterwell Estate Limited | Hospitality | 2014 |
| C & a Tonkin Farm Ltd | Agriculture & fishing | 2017 |
| C & J Plumbing & Heating South West Ltd | Construction | 2012 |
| C&D(Uk) Limited | Public administration | 2024 |
| C&V Store Limited | Wholesale & retail | 2019 |
| C-Skins Wetsuits Limited | Extraterritorial | 2002 |
| C.E. Banyard Limited | Manufacturing | 1982 |
| C.P. Button Limited | Agriculture & fishing | 1980 |
| Cabilla Energy Ltd | Energy | 2010 |
| Callywith Accountants Limited | Professional & scientific | 2025 |
| Callywith College Trust | Education | 2015 |
| Camel Hire Limited | Administrative & support | 2014 |
| Camel Refrigeration Limited | Manufacturing | 2014 |
| Camel Storage Limited | Other services | 2009 |
| Camel Valley Limited | Manufacturing | 2001 |
| Capehope Limited | Agriculture & fishing | 1997 |
| Capillary Tube Supplies Limited | Wholesale & retail | 2002 |
| Car Storage Cornwall Limited | Transport & logistics | 2021 |
| Caraway Management Company Limited | Households | 2004 |
| Carbonarc Global Ltd | Mining & quarrying | 2026 |
| Cardinham & Rifle Range Commons Ltd | Agriculture & fishing | 2005 |
| Care at Home (Cornwall) Limited | Health & social care | 2020 |
| Carlyon Systems Ltd | Information & communication | 2020 |
| Carrack Widden Management Limited | Households | 1983 |
| CAS Nominees Ltd | Extraterritorial | 2005 |
| Castle Hill House Limited | Health & social care | 2003 |
| Caterbook Ltd | Information & communication | 2005 |
| Cats Private Care Ltd | Health & social care | 2026 |
| CB Tutoring & Exams Ltd | Education | 2024 |
| Cdec Consulting Limited | Professional & scientific | 2024 |
| Cdec Design and Construction Ltd | Construction | 2018 |
| CE Metal Fabrications Limited | Manufacturing | 2018 |
| Cein Stores Limited | Administrative & support | 2022 |
| Celebration Pyrotechnics Ltd | Arts & recreation | 2002 |
| Cellar Cornwall Limited | Wholesale & retail | 2022 |
| Celtic Guns Limited | Wholesale & retail | 2009 |
| CEO Medical Services Ltd | Health & social care | 2024 |
| Ceretech Ltd | Information & communication | 2005 |
| Cherrywood Manor Management Company Limited | Households | 2015 |
| Chetwode RAM Associates Ltd | Professional & scientific | 2013 |
| Chocolate Dog Limited | Professional & scientific | 2003 |
| Chromotropic Limited | Arts & recreation | 2021 |
| Chrysalis Barns Limited | Hospitality | 2019 |
| CHU SHU Limited | Manufacturing | 2024 |
| CHX Products Limited | Manufacturing | 1997 |
| CHX Products Services Limited | Manufacturing | 2022 |
| City Wharf (Truro) Management Company Limited | Households | 2001 |
| Cjb's Surf Company Limited | Wholesale & retail | 1997 |
| CJR Building Ltd | Construction | 2021 |
| Clann Lane Limited | Construction | 2021 |
| Clapper Investments LLP | | 2006 |
| Classic Car Trim Products Ltd | Manufacturing | 2010 |
| Clotilde Limited | Professional & scientific | 2016 |
| CLT GAP Limited | Professional & scientific | 2021 |
| CML Transport (Cornwall) Limited | Wholesale & retail | 2015 |
| CN Heating Limited | Construction | 2008 |