| Brand Creative Media Limited | Professional & scientific | 2010 |
| Brand Dialogue Limited | Professional & scientific | 1988 |
| Brand Economics Limited | Professional & scientific | 2009 |
| Brand Equity Limited | Professional & scientific | 1996 |
| Brand Exchange Ltd | Wholesale & retail | 2013 |
| Brand Finance PLC | Professional & scientific | 1996 |
| Brand Finance Technical Services Ltd | Professional & scientific | 1996 |
| Brand Genius Limited | Professional & scientific | 2007 |
| Brandon Hill Capital Limited | Financial services | 2001 |
| Brave Biscuit Studios C.I.C. | Arts & recreation | 2020 |
| Bray Marine Contractors Ltd | Transport & logistics | 2025 |
| Breakerfall Consultancy Services Ltd | Professional & scientific | 2022 |
| Breathe Falmouth Club Limited | Other services | 2015 |
| Breezy FIX Limited | Construction | 2022 |
| Brewmoore Ltd | Professional & scientific | 2013 |
| Brian Boulton Developments Limited | Construction | 2020 |
| Brian Boulton Limited | Construction | 2014 |
| Briants Limited | Real estate | 2018 |
| Brickfield Ceramics C.I.C. | Education | 2021 |
| Bright Eyes Day Nursery Limited | Education | 2002 |
| Brightstar Investments Limited | Construction | 1950 |
| Brilliantly Collective Ltd | Extraterritorial | 2023 |
| Brilliantly Green Limited | Extraterritorial | 2025 |
| Brilliantly Organised Limited | Extraterritorial | 2025 |
| Broken Wave Ltd | Manufacturing | 2026 |
| Brookdene Properties Limited | Real estate | 2014 |
| Brothers NOT Brothers Ltd | Hospitality | 2020 |
| Brown & Richardson Limited | Real estate | 1946 |
| Bryher (Mouldings) Limited | Manufacturing | 1978 |
| BT Marine (Electronics) Ltd | Professional & scientific | 2025 |
| Budock Properties Limited | Real estate | 2013 |
| Build 87 Ltd | Real estate | 2025 |
| Bull and Wolf Film Co Limited | Information & communication | 2008 |
| BV (Falmouth) LLP | | 2011 |
| BWR Management Company Limited | Real estate | 2017 |
| BY Sarah Johnson Ltd | Wholesale & retail | 2024 |
| C K Coode Property Ltd | Real estate | 2016 |
| C K Plumbing and Heating Cornwall Ltd | Professional & scientific | 2024 |
| C M Midnight Limited | Professional & scientific | 2021 |
| C.F. Systems Limited | Information & communication | 2001 |
| C.P. Pipework Services Limited | Construction | 2016 |
| Cadgwith Health Systems Limited | Health & social care | 2025 |
| Cafe Kernow Ltd | Hospitality | 2020 |
| Caja Projects Ltd | Real estate | 2019 |
| Calidris Design Limited | Professional & scientific | 2001 |
| Calland & Milby Ltd | Hospitality | 2025 |
| Calymene Ltd | Professional & scientific | 2013 |
| Camborne School of Mines Association Ltd | Other services | 2018 |
| Cambrian Offshore South West Ltd | Administrative & support | 2019 |
| Campbell Corrosion Consultants Ltd | Construction | 2025 |
| Capella Court Management Limited | Households | 1989 |
| Capital Credit Ltd | Financial services | 2022 |
| Capworth Property Management Ltd | Real estate | 2022 |
| Cardinal Marine Limited | Administrative & support | 2002 |
| Carmino House Ltd | Wholesale & retail | 2025 |
| Carnmenellis Carriage Club Limited | Arts & recreation | 2002 |
| Carrick Owen (Properties) Ltd | Hospitality | 2018 |
| Cars of Cornwall Limited | Wholesale & retail | 2026 |
| Carsawsan Woodland Ltd | Agriculture & fishing | 2018 |
| Carter Stanley Limited | Real estate | 1999 |
| Castaways Limited | Hospitality | 2003 |
| Castle Bay Construction (SW) Limited | Construction | 2026 |
| Castle Beach Ltd | Real estate | 2018 |
| Castle Investment Solutions Ltd | Financial services | 2010 |
| Castle Sports & Uniform Limited | Wholesale & retail | 2017 |
| Cathy Reads Books Limited | Arts & recreation | 2016 |
| Cavanagh Country Pubs Limited | Hospitality | 2022 |
| Cavender Properties Ltd | Households | 2022 |
| CBE Stores Limited | Wholesale & retail | 2023 |
| CCS Directors Ltd | Professional & scientific | 2024 |
| CCS Hold Co Ltd | Professional & scientific | 2024 |
| CD Mortgage Services Ltd | Financial services | 2024 |
| Celtic Fish and Game Limited | Wholesale & retail | 2011 |
| Census Ex-Forces Recruitment Ltd | Administrative & support | 2013 |
| CEO Studio Ltd | Professional & scientific | 2021 |
| Cesc Limited | Manufacturing | 2022 |
| Cgen Media Ltd | Information & communication | 2016 |
| Chablais Limited | Manufacturing | 2017 |
| Chace Kendrick Ltd | Construction | 2007 |
| Chachachas Falmouth Limited | Hospitality | 2023 |
| Change in Nature CIC | Health & social care | 2016 |
| Chatterbox TV Limited | Information & communication | 2008 |
| Cheap Date Dance LLP | | 2015 |
| Cheerhealth Care Limited | Health & social care | 2004 |
| Child to Champion Ltd | Arts & recreation | 2021 |
| Chill Gelato Southwest Ltd | Hospitality | 2026 |
| Chocolarder Ltd | Administrative & support | 2014 |
| Choraline Limited | Information & communication | 2024 |
| Chough Construction Limited | Real estate | 1985 |
| Choughs Trades Limited | Administrative & support | 2013 |
| Christine Joy Scarlett Limited | Extraterritorial | 2025 |
| Chunky Fish Ltd | Arts & recreation | 2021 |
| Churcher Wealth Management Ltd | Financial services | 2019 |
| CHY an Vounder Holdings Limited | Hospitality | 2015 |
| Chycara Events Ltd | Administrative & support | 2019 |
| Chycara Limited | Hospitality | 2008 |
| Cimen Food Ltd | Hospitality | 2022 |
| Cj's@Thesanctuary Limited | Administrative & support | 2017 |
| Claremont House(Falmouth)Management Company Limited | Professional & scientific | 1967 |
| Claris Catering Limited | Hospitality | 2024 |