| Chasename Limited | Construction | 1990 |
| Chasename Services Limited | Real estate | 2004 |
| Chefs Choice (Crediton) Ltd | Hospitality | 2008 |
| Cholhouse Lane Management Company Limited | Real estate | 2025 |
| Chris Bell Trading Ltd | Wholesale & retail | 2023 |
| Chris Dorling (SW) Ltd | Construction | 2022 |
| Church Green Bickleigh Management Company Limited | Households | 2021 |
| Church Lane Group | Financial services | 2021 |
| Cibus Technical Ltd | Hospitality | 2022 |
| Circuit Wednesday Ltd | Construction | 2014 |
| Clarie and Co Ltd | Administrative & support | 2018 |
| Clarity Clear Solutions for Social Purpose Organisations CIC | Professional & scientific | 2014 |
| Clarke Signalling Solutions Limited | Administrative & support | 2016 |
| Cleverkidz Limited | Health & social care | 2002 |
| Cliston View Management Ltd | Households | 2021 |
| Clive Tonkin Surveying Services Limited | Professional & scientific | 2011 |
| Cloudio Limited | Information & communication | 2013 |
| CMC Cullompton Ltd | Manufacturing | 2026 |
| CMC Holdings (SW) Ltd | Information & communication | 2012 |
| CMH Construction (Devon) Limited | Construction | 2017 |
| CMS Plumbing & Heating (SW) Limited | Construction | 2023 |
| Cockerham Commercials & Recovery Services Limited | Wholesale & retail | 2009 |
| Cockerham Developments Limited | Financial services | 2021 |
| Cocktree Farm Limited | Agriculture & fishing | 2004 |
| Cole Building Services (Exeter) Ltd | Construction | 2021 |
| Coley's Enterprises Limited | Wholesale & retail | 2011 |
| Coley's Stores Limited | Wholesale & retail | 2024 |
| Colin J Brown Limited | Construction | 2016 |
| Colmills Exchange Limited | Wholesale & retail | 2020 |
| Colmills Mediums Limited | Wholesale & retail | 2024 |
| Comer Carpets Limited | Wholesale & retail | 2015 |
| Compost Collective CIC | Water & waste | 2024 |
| Concept Card MFG Limited | Manufacturing | 2013 |
| Concept Transport Consultants Ltd | Transport & logistics | 2012 |
| Conferences South West Limited | Education | 2011 |
| Conibear Limited | Wholesale & retail | 2023 |
| Conker Tree Solutions Limited | Information & communication | 2020 |
| Construct Smart Devon Limited | Other services | 2021 |
| Consult Here Ltd | Information & communication | 2020 |
| Coombe Barton Limited | Agriculture & fishing | 2002 |
| Coombestone Limited | Agriculture & fishing | 2008 |
| Copplestone Recreation Association CIC | Arts & recreation | 2006 |
| Copstone Briar Rose Limited | Agriculture & fishing | 2025 |
| Corden Consulting Limited | Professional & scientific | 2020 |
| Cornwall Concrete Limited | Professional & scientific | 2008 |
| Corrigan Contractors Limited | Construction | 2015 |
| Cottage Carpentry Ltd | Construction | 2022 |
| Country Wide Reliability Ltd | Agriculture & fishing | 2019 |
| County Scaffold Ltd | Construction | 2021 |
| Cowell Plumbing and Heating Ltd | Construction | 2023 |
| CPD Property Developments Ltd | Real estate | 2024 |
| Crackshots MLG LLP | | 2008 |
| Creation Distribution Limited | Wholesale & retail | 2013 |
| Creative Kinesiology Limited | Education | 2005 |
| Crediton Area Development Trust Ltd | Arts & recreation | 1999 |
| Crediton Care & Support Homes Limited | Health & social care | 2002 |
| Crediton Care Services Limited | Health & social care | 2015 |
| Crediton Coffee Company Ltd | Hospitality | 2011 |
| Crediton Dairy Limited | Manufacturing | 2013 |
| Crediton Denture Clinic Limited | Health & social care | 2007 |
| Crediton Independent BED Company Ltd | Wholesale & retail | 2020 |
| Crediton Limited | Wholesale & retail | 1989 |
| Crediton Milling Company Limited | Manufacturing | 1964 |
| Crediton Nails Ltd | Other services | 2025 |
| Crediton Operatic and Dramatic Society Limited | Arts & recreation | 2015 |
| Crediton Pharmacy Limited | Wholesale & retail | 2014 |
| Crediton United Football Club Ltd | Other services | 2025 |
| Creedy Associates Ltd | Professional & scientific | 2019 |
| Creedy Barton Limited | Agriculture & fishing | 2010 |
| Creedy Carver Chickens Limited | Agriculture & fishing | 2017 |
| Creedy Carver Holdings Limited | Financial services | 2024 |
| Creedy Carver Limited | Agriculture & fishing | 2004 |
| Creedy Cleaning Services Ltd | Administrative & support | 2025 |
| Creedy Consultants LLP | | 2014 |
| Crossparks Limited | Agriculture & fishing | 2003 |
| CS Johnson Property Limited | Real estate | 2025 |
| Csinca Consultancy Ltd | Information & communication | 2024 |
| Ctce Enterprises Limited | Real estate | 2012 |
| CTH22 Ltd | Administrative & support | 2022 |
| Cut-Right Carpenters Limited | Manufacturing | 2010 |
| Cutters Yard Ltd | Other services | 2023 |
| D & L Transport Consultants Ltd | Transport & logistics | 2022 |
| D&A Country Supplies Devon & Cornwall Ltd | Wholesale & retail | 2026 |
| D&A Country Supplies Devon Ltd | Other services | 2022 |
| D&M Devon Limited | Other services | 2017 |
| DAN Hobday Art Ltd | Arts & recreation | 2019 |
| DAN Murch-Seage Ltd | Construction | 2011 |
| DAN Rees Ltd | Wholesale & retail | 2021 |
| Danu Design Ltd | Information & communication | 2020 |
| Darks Sparkz Ltd | Construction | 2025 |
| Dart & Francis Limited | Real estate | 1905 |
| Dartmoor Construction Limited | Construction | 2023 |
| Dartmoor Railway Inn Management Co Limited | Real estate | 2006 |
| Dartmoor Roots Ltd | Agriculture & fishing | 2024 |
| Dartmoor Treehouses Ltd | Hospitality | 2020 |
| Datasplat Limited | Information & communication | 2023 |
| Datchy Ltd | Public administration | 2024 |
| Dave Totterdell Electrical Limited | Manufacturing | 2007 |
| DAW Refrigeration Limited | Manufacturing | 2004 |
| DD Sealants Limited | Construction | 2013 |