| Claybridge Care Ltd | Other services | 2022 |
| Claybridge Holdings Ltd | Financial services | 2022 |
| Clikk Hospitality Ltd | Hospitality | 2021 |
| Clipper Sharp Limited | Manufacturing | 2005 |
| Clonami Ltd | Wholesale & retail | 2024 |
| Cloud Hills Management Company Limited | Households | 2010 |
| Clyst Hydon Cricket & Sports Club | Arts & recreation | 2022 |
| Clyst Hydon Swimming Club | Arts & recreation | 2006 |
| Clyst Information Systems Limited | Information & communication | 2016 |
| Coach House Arts Ltd | Arts & recreation | 2007 |
| Coffee POD SW Ltd | Hospitality | 2024 |
| Coldharbour Mill Limited | Wholesale & retail | 1981 |
| Coldharbour Mill Trust Limited | Arts & recreation | 2007 |
| Colin Layzell Cabinetmakers Ltd | Manufacturing | 2023 |
| Collective Design Studio Ltd | Information & communication | 2024 |
| Collis Cleaning Ltd | Administrative & support | 2021 |
| Colourtone (Taunton) Limited | Extraterritorial | 2019 |
| Compass Consultancy Services Ltd | Other services | 2015 |
| Compete & EAT Limited | Hospitality | 1998 |
| Complete Property Services SW Ltd | Construction | 2013 |
| Complete Transport Management Ltd | Transport & logistics | 2014 |
| Complete Venue Solutions Limited | Administrative & support | 2015 |
| Connecting the Culm CIC | Professional & scientific | 2025 |
| Connexercise CIC | Information & communication | 2024 |
| Core Coastal Nutrition Limited | Wholesale & retail | 2026 |
| Core Synergy Limited | Financial services | 2024 |
| Cotux Consulting Limited | Professional & scientific | 2021 |
| Country Style Products Limited | Other services | 2002 |
| Craddock Barns Manco Limited | Households | 2022 |
| Craig Bryant Academy Ltd | Education | 2025 |
| Creative Mojo Limited | Education | 2016 |
| Crown Eyecare Limited | Wholesale & retail | 2019 |
| Cshi Windows & Doors Limited | Wholesale & retail | 2016 |
| CTW Safety Limited | Professional & scientific | 2026 |
| Cullompton Community Centre (Operations) Limited | Real estate | 2011 |
| Cullompton Curry Ltd | Hospitality | 2025 |
| Cullompton Enterprise Partnership Ltd | Administrative & support | 2019 |
| Cullompton Glass & Glazing Ltd | Construction | 2015 |
| Cullompton Nails Ltd | Other services | 2023 |
| Cullompton Walronds Limited | Hospitality | 2014 |
| Cully Charcoal Ltd | Hospitality | 2025 |
| Culm Aviation Services Ltd | Professional & scientific | 2019 |
| Culm Co-Operative Learning Partnership | Education | 2013 |
| Culm Consulting Limited | Professional & scientific | 2018 |
| Culm Valley Angling Ltd | Wholesale & retail | 2016 |
| Culm Valley Bookkeeping and Payroll Limited | Professional & scientific | 2002 |
| Culm Valley Carpets Limited | Wholesale & retail | 2017 |
| Culm Valley Civils Ltd | Construction | 2023 |
| Culmbridge Site Management Limited | Administrative & support | 2013 |
| Culmside Support LLP | | 2011 |
| Culmstock Old Mill Limited | Households | 1992 |
| Culmstock Technology and Consultancy Limited | Professional & scientific | 2019 |
| Custom Joinery Limited | Construction | 2011 |
| D & G Events Limited | Arts & recreation | 2014 |
| D & H Plant Ltd | Administrative & support | 2007 |
| D a & B D Parsons Limited | Agriculture & fishing | 2018 |
| D K Reyntals Ltd | Real estate | 2019 |
| D M Decorating Ltd | Construction | 2011 |
| D Wood Plumbing & Heating Limited | Construction | 2015 |
| DAN River Limited | Professional & scientific | 2023 |
| Danygabi Limited | Administrative & support | 2025 |
| Darren Moon Building Services Limited | Construction | 2016 |
| Darwin Estates Ltd | Professional & scientific | 2009 |
| Darwin Estates Portugal LLP | | 2023 |
| Dasslers Craft Limited | Wholesale & retail | 2020 |
| DE Gama Poultry Ltd | Professional & scientific | 2018 |
| De-Ion Limited | Extraterritorial | 2017 |
| Deep Blue Logic Limited | Information & communication | 2004 |
| Devon and Somerset Sweepers Limited | Construction | 2004 |
| Devon COB and Lime Limited | Construction | 2018 |
| Devon Cookery School Ltd | Education | 2020 |
| Devon Garage Conversions Ltd | Construction | 2025 |
| Devon Green and Blue Limited | Manufacturing | 2012 |
| Devon Paving Ltd | Administrative & support | 2021 |
| Devon Plumbing and Heating Ltd | Construction | 2025 |
| Devon Rural Events C.I.C. | Arts & recreation | 2018 |
| Devon Valley Contractors Ltd | Construction | 2025 |
| Devonshire Countryside Services Ltd | Administrative & support | 2020 |
| Devonshire Groundworks Limited | Construction | 2013 |
| Dick Hartley Limited | Wholesale & retail | 2011 |
| Digi-Tel Communications (UK) Ltd | Information & communication | 1997 |
| Digital Colour Services Ltd | Manufacturing | 2016 |
| Direct Care Medical Ltd | Health & social care | 2025 |
| DJN Fresh Meat Ltd | Wholesale & retail | 2025 |
| DNH Transport Ltd | Wholesale & retail | 2022 |
| Dogs R Dogs Ltd | Other services | 2024 |
| Donnelly Safety Services Ltd | Administrative & support | 2024 |
| DPF Systems Ltd | Wholesale & retail | 2025 |
| DPH Removals Limited | Transport & logistics | 2025 |
| Dragonträull Fuels Ltd | Mining & quarrying | 2022 |
| Dragonträull Holdings Ltd | Wholesale & retail | 2021 |
| Dragonträull Ltd | Manufacturing | 2020 |
| Drakes Carpentry & Building Services Limited | Construction | 2019 |
| Drop in the Ocean Music Ltd | Information & communication | 2024 |
| Drovers Lifts Ltd | Construction | 2022 |
| Drovers Mobility Ltd | Wholesale & retail | 2023 |
| DT Garden Services (DAN Scott ) Ltd | Extraterritorial | 2023 |
| Duna Films Ltd | Information & communication | 2018 |
| Dunford-Brown Residential Ltd | Real estate | 2020 |
| DW & RE Limited | Professional & scientific | 2023 |