| Certitude Services TLD Limited | Administrative & support | 2011 |
| CGB Property Management Ltd | Real estate | 2020 |
| Champion House Management Company Limited | Real estate | 2005 |
| Channings Construction Limited | Administrative & support | 2018 |
| Chapel Meadow (Callington) Management Company Limited | Households | 2019 |
| Chapple Access Management Company Limited | Households | 2020 |
| Chapple Water Management Ltd | Water & waste | 2020 |
| Chef AID Ltd | Information & communication | 2006 |
| Chryana Limited | Real estate | 2014 |
| CJF Wealth Planning Ltd | Financial services | 2014 |
| CJP Financial Associates Limited | Professional & scientific | 2016 |
| Clay Clinic Limited | Health & social care | 2018 |
| Cloud Based Accountancy Limited | Professional & scientific | 2010 |
| CMR Car Storage Ltd | Transport & logistics | 2024 |
| Coastel Limited | Wholesale & retail | 2003 |
| Colin's of Callington Limited | Wholesale & retail | 2010 |
| Combat Athletics Academy Ltd | Arts & recreation | 2024 |
| Computoor Associates Limited | Professional & scientific | 1998 |
| Connected Economics Limited | Professional & scientific | 2011 |
| Coombe Holidays Ltd | Hospitality | 2020 |
| Coombe Valley Nursery (Callington) Limited | Education | 2014 |
| Cornish Essential Oils Limited | Manufacturing | 2018 |
| Cornish Whispers Ltd | Manufacturing | 2021 |
| Cornwall Tyre Repair Service Ltd | Manufacturing | 1974 |
| Corporate Directorship Limited | Professional & scientific | 2022 |
| Cptc Limited | Education | 2010 |
| Crichton Manufacturing Group Ltd | Financial services | 2021 |
| Crooz Pack Ltd | Wholesale & retail | 2014 |
| Crowle & Scoble Limited | Construction | 2000 |
| Crown B B Properties Limited | Real estate | 2010 |
| Cruciate Limited | Other services | 2011 |
| CTE SW Ltd | Manufacturing | 2025 |
| CUB and Co Clothing Limited | Wholesale & retail | 2025 |
| D Hall Plant Hire & Groundworks Ltd | Construction | 2024 |
| Dansenseai Ltd | Professional & scientific | 2026 |
| Dante Production Limited | Information & communication | 2018 |
| Darkfitness Ltd | Other services | 2019 |
| Darkperformance Gym Ltd | Arts & recreation | 2015 |
| Dartmoor Energy Limited | Wholesale & retail | 2018 |
| David Stell Limited | Health & social care | 2012 |
| Dawson Nott Limited | Real estate | 2021 |
| DCD Pensions Ltd | Real estate | 1978 |
| Dean Shipton Developments Limited | Construction | 2019 |
| Devon & Cornwall Electrical Ltd | Construction | 2022 |
| Devon Pool and Spa Company Ltd | Other services | 2017 |
| Devon Venison Ltd | Wholesale & retail | 2023 |
| DG Car Repairs and Tyres Limited | Wholesale & retail | 2021 |
| Diavell Engineering Limited | Professional & scientific | 2017 |
| Dignand Enterprises Limited | Real estate | 2003 |
| Dilhan Kebab Ltd | Hospitality | 2020 |
| Dirty Soap Cosmetics Ltd | Wholesale & retail | 2022 |
| DJB Consultants Ltd | Professional & scientific | 2014 |
| Domum Property Holdings Ltd | Real estate | 2024 |
| Domum Residential Property Ltd | Real estate | 2019 |
| Dove Foundation CIC | Arts & recreation | 2021 |
| Dove Productions Ltd | Arts & recreation | 2021 |
| Downderry Group Ltd. | Construction | 1971 |
| Drakelands Produce Limited | Wholesale & retail | 1997 |
| Dreckley Ltd | Hospitality | 2021 |
| Dte-Elite Ltd | Education | 2022 |
| Dynotec Ltd | Professional & scientific | 2017 |
| Dytex Technology Limited | Information & communication | 1998 |
| Eagle Rock Productions Limited | Other services | 2008 |
| East Cornwall Construction Limited | Construction | 2006 |
| Eclipse Tanning Studio Ltd | Other services | 2024 |
| Effective Practice Ltd | Professional & scientific | 2013 |
| EFJ Group Limited | Real estate | 2020 |
| EK Engineering SW Ltd | Manufacturing | 2023 |
| EL Greco Miniatures Limited | Wholesale & retail | 2017 |
| Elite Glazing SW Ltd | Construction | 2025 |
| Encompass Hospitality Solutions Ltd | Information & communication | 2025 |
| Engineo Ltd | Professional & scientific | 2025 |
| Equivp Ltd | Professional & scientific | 2021 |
| Eric Distin Agriculture Ltd | Agriculture & fishing | 2023 |
| Essential Supplies UK Limited | Wholesale & retail | 1995 |
| Evans Properties & Developments Ltd | Real estate | 2024 |
| Evrywhre Ltd | Manufacturing | 2023 |
| F Camargo Ltd | Other services | 2022 |
| FAB Group Holdings Limited | Financial services | 2022 |
| FAB Group Properties Limited | Real estate | 2023 |
| FAB Teeth Club Ltd | Information & communication | 2026 |
| FAB Teeth Limited | Health & social care | 2021 |
| Fabulous Finn Limited | Wholesale & retail | 2018 |
| FB Brand Ventures Limited | Professional & scientific | 2026 |
| First Choice PCS Ltd | Other services | 2009 |
| Flat FOX Trading Ltd | Wholesale & retail | 2019 |
| Flat OUT Properties Limited | Other services | 2001 |
| Fleetwood Property Services Ltd | Real estate | 2025 |
| Flourish Workplace Limited | Professional & scientific | 2013 |
| Forestry & Timber Limited | Agriculture & fishing | 2004 |
| Format Extend Limited | Professional & scientific | 2012 |
| Forster Hydrographic Survey Limited | Professional & scientific | 2015 |
| Foundation First Construction Ltd | Construction | 2024 |
| Four Teas Cafe, Mousehole. Limited | Hospitality | 2017 |
| Fowey Wellness Centre Ltd | Health & social care | 2020 |
| Foxr Limited | Real estate | 2009 |
| FRA Compliance Limited | Administrative & support | 2018 |
| FRA Consultancy Ltd | Administrative & support | 2023 |
| Franca Consulting Ltd | Professional & scientific | 2021 |
| Frbp Limited | Real estate | 2012 |