| Beautifully Handcrafted Ltd | Wholesale & retail | 2013 |
| Bekarma Yoga Ltd | Arts & recreation | 2019 |
| Bella & Goose Limited | Manufacturing | 2019 |
| Belle Modelle Ltd | Wholesale & retail | 2014 |
| Benedict Quinn Limited | Hospitality | 2015 |
| Bentley & Bentley Property Ltd | Real estate | 2023 |
| Bespoke IT Software Limited | Information & communication | 2018 |
| Bexleyhill Limited | Agriculture & fishing | 2009 |
| Beyond the Question Ltd | Health & social care | 2023 |
| BF Adventure | Education | 1998 |
| Bgse Limited | Other services | 2022 |
| Bison Construction Cornwall Ltd | Construction | 2022 |
| Black Rock Marine Joinery Ltd. | Manufacturing | 2019 |
| Blackmine Ltd | Professional & scientific | 2020 |
| Blade Innovations Limited | Construction | 2012 |
| Blazing Burners Limited | Construction | 2016 |
| Blocki Ltd | Manufacturing | 2019 |
| Blonde & Grey Limited | Hospitality | 2019 |
| Blue and Green Plumbing and Heating Ltd | Construction | 2013 |
| Blue Flame (Cornwall) Limited | Manufacturing | 2004 |
| Blue Flame (Cornwall) Trustees Limited | Professional & scientific | 2024 |
| Blue Jersey Marine Ltd | Manufacturing | 2024 |
| Blue Mustard (Falmouth) Limited | Hospitality | 2012 |
| Blue Mustard Limited | Hospitality | 2004 |
| Blue River Table LLP | | 2018 |
| Blueprint Falmouth Ltd | Hospitality | 2024 |
| Bluesock Management Ltd | Professional & scientific | 2016 |
| Body Confidence HQ Ltd | Administrative & support | 2019 |
| Boosters Limited | Administrative & support | 2004 |
| Bosanneth Limited | Hospitality | 2019 |
| Boslowick Court (Falmouth) Limited | Households | 1965 |
| Boulder RYN Ltd | Arts & recreation | 2025 |
| Bourne Valley Homes Limited | Construction | 2010 |
| Bourneford Homes Limited | Construction | 2020 |
| Bourneford Limited | Construction | 2015 |
| Bourneford Properties Limited | Real estate | 2019 |
| Bradfords Quay Management Company Limited | Households | 2012 |
| Brain Developmentuk Limited | Health & social care | 2025 |
| Brand Offshore Services Ltd. | Professional & scientific | 2006 |
| Brian and Kerrys Window Cleaning Services Limited | Households | 2017 |
| Brixton's Baddest Ltd | Wholesale & retail | 2015 |
| Broadgate Health Clinic Limited | Health & social care | 2009 |
| Brokkr Limited | Wholesale & retail | 2024 |
| Bríd's Cross Brewing Ltd | Manufacturing | 2022 |
| Buff and Beauty Ltd | Other services | 2025 |
| Business DOC Ltd | Professional & scientific | 2014 |
| C K (Cornwall) Ltd. | Administrative & support | 1994 |
| C Space (Cornwall) Limited | Real estate | 2018 |
| CAD Accountancy Ltd | Professional & scientific | 2019 |
| Cafe Mylor Cornwall Ltd | Hospitality | 2012 |
| Camborne Dental Practice Limited | Health & social care | 2020 |
| Cameron Ward Trading Limited | Professional & scientific | 2014 |
| Campanafine Limited | Construction | 2022 |
| Carbon Offset Cornwall Limited | Other services | 2021 |
| Carnstead Property Holdings Ltd | Real estate | 2017 |
| Carnstead Property Ltd | Construction | 2017 |
| Carrick Property Management Limited | Households | 2012 |
| Case Study Capital Limited | Real estate | 2024 |
| Case Study Land Limited | Real estate | 2025 |
| Cashtale Limited | Households | 1991 |
| Casu Consulto Limited | Manufacturing | 2003 |
| Cateaton Investments LLP | | 2004 |
| Caxton Communications Limited | Professional & scientific | 2015 |
| CB Motor Services Ltd | Wholesale & retail | 2025 |
| CBS Ventures (SW) Ltd | Education | 2023 |
| CH Baker Hill Ltd. | Administrative & support | 2016 |
| CH Property Ltd | Real estate | 2016 |
| Chambers Pencils Limited | Manufacturing | 2013 |
| Chandler Park Management Company Limited | Households | 2017 |
| Chandlers Accountants Ltd | Professional & scientific | 2018 |
| Change and Beyond Ltd | Education | 2010 |
| Charcoal Mill Limited | Construction | 2024 |
| Charlie's Coffee House Ltd | Hospitality | 2022 |
| Checkfer Ltd | Information & communication | 2017 |
| Cherry Campers Ltd | Wholesale & retail | 2019 |
| Chinewood Housing (Camborne) Ltd | Real estate | 2021 |
| Chiro.London Ltd | Health & social care | 2014 |
| Chops. Digital Ltd | Information & communication | 2022 |
| Chris Davey Music Ltd | Information & communication | 2019 |
| Chris Symons Builders Limited | Construction | 2001 |
| Christian Paul Ltd | Manufacturing | 2005 |
| Chyan Pure Foods CIC | Agriculture & fishing | 2022 |
| Ciao Cucine Limited | Construction | 2016 |
| Cirencester Chiropractic Limited | Health & social care | 2006 |
| Clare Chandler Limited | Health & social care | 2024 |
| Class Fire Safety Limited | Public administration | 2022 |
| Clean Hydrogen Limited | Professional & scientific | 2021 |
| Clicksell Ltd | Information & communication | 2013 |
| Cliff Court (Falmouth) Management Limited | Households | 2008 |
| Cliff House and Penolva Management Company Limited | Real estate | 2017 |
| Climate Change Risk Management Limited | Professional & scientific | 2005 |
| Cloud Connected UK Ltd | Information & communication | 2023 |
| Cloverfield Construction Ltd | Construction | 2017 |
| Coast Medic | Health & social care | 2012 |
| Coast Medic Ambulance Ltd | Health & social care | 2022 |
| Cocare Consulting Limited | Professional & scientific | 2019 |
| Codices Interactive Ltd. | Information & communication | 2018 |
| Colliers Cornish Cheese Ltd. | Manufacturing | 2014 |
| Commproc Consulting Ltd | Professional & scientific | 2015 |
| Community Roots Cornwall CIC | Agriculture & fishing | 2021 |