| Clearwater (Services) LLP | | 2011 |
| Clearwater Management Company (Bishopsteignton) Limited | Households | 2005 |
| Clements Solutions Limited | Professional & scientific | 2026 |
| Cliff View Property Management Limited | Households | 2025 |
| Clifton House (Teignmouth) Management Limited | Households | 1991 |
| Clippers (Teignmouth) Limited | Other services | 2011 |
| Clothier Consulting Limited | Professional & scientific | 2023 |
| CLOUD9 Homes Ltd | Construction | 2015 |
| CLOUD9 Investments Ltd | Real estate | 2022 |
| Cloudifinity Ltd | Information & communication | 2019 |
| Coach House Lettings Ltd | Hospitality | 2019 |
| Coach Link UK Hotel Wholesaler Ltd | Administrative & support | 2014 |
| Coast Path Cabins LLP | | 2023 |
| Collard Security Limited | Administrative & support | 2020 |
| Compass Design Limited | Other services | 2018 |
| Connect 49 (Contracts) Ltd | Transport & logistics | 2010 |
| Connect 49 Limited | Transport & logistics | 1996 |
| Connect Consultancy Solutions Ltd | Professional & scientific | 2021 |
| Container Safety Technology (UK) Ltd | Manufacturing | 2018 |
| CONTENT2SCREEN Ltd | Professional & scientific | 2019 |
| Cool Beans on the Green Ltd | Hospitality | 2021 |
| Cool on the Inside Ltd | Manufacturing | 2025 |
| Copes of Earlswood Limited | Transport & logistics | 1996 |
| Cora and Co (Teignmouth) Limited | Other services | 2002 |
| Corpdata Limited | Information & communication | 1992 |
| Cotswold Baby Co. Ltd | Wholesale & retail | 2022 |
| Cottages South West Ltd | Hospitality | 2011 |
| Cpmi Ltd | Professional & scientific | 2025 |
| Create ME Books Limited | Information & communication | 2015 |
| Crest Leisure Limited | Other services | 2018 |
| Crew Coffee Ltd | Hospitality | 2020 |
| Cross Global Limited | Professional & scientific | 2015 |
| Curtain Rail Supplies Ltd | Manufacturing | 2017 |
| Curtain Sense Limited | Wholesale & retail | 2006 |
| Curwell Windows Limited | Construction | 1998 |
| D.L. Woodward Plumbing & Heating Limited | Construction | 2001 |
| Daimond House Management Limited | Households | 1991 |
| Danum Service Stations | Real estate | 1962 |
| Dart MOT & Autocare Ltd | Wholesale & retail | 2026 |
| Dartmoor Investment Trust Limited | Financial services | 1990 |
| Dartmoor Outdoor Events Ltd | Arts & recreation | 2024 |
| Dawlish Airshow Ltd | Arts & recreation | 2010 |
| Dawlish Boat Trips Ltd | Administrative & support | 2025 |
| Dawlish Building Supplies Limited | Wholesale & retail | 2025 |
| Dawlish Carpets & Flooring Ltd | Wholesale & retail | 2021 |
| Dawlish Flat Management Company Limited | Extraterritorial | 1995 |
| Dawlish Storage Solutions Limited | Administrative & support | 2008 |
| DCR Consultancy Limited | Professional & scientific | 2007 |
| DDJ Performance LLP | | 2011 |
| Ddrbs Ltd | Financial services | 2023 |
| DE L'Eau Ltd | Construction | 1990 |
| Deedspin Limited | Households | 1986 |
| Dekrow Ltd | Administrative & support | 2011 |
| Deuce PDL Club Ltd | Arts & recreation | 2025 |
| Devon Accounting Solutions Limited | Professional & scientific | 2022 |
| Devon Arms (Teignmouth) Ltd | Hospitality | 2025 |
| Devon Community Health Kitchen CIC | Hospitality | 2024 |
| Devon Community Sauna CIC | Health & social care | 2024 |
| Devon Ecology Limited | Professional & scientific | 2020 |
| Devon Express Logistics Limited | Transport & logistics | 2024 |
| Devon Heat Limited | Construction | 2018 |
| Devon Leisure OFF Road Activities Limited | Arts & recreation | 2007 |
| Devon Sauna Hub Ltd | Health & social care | 2024 |
| Devon Solutions Group Limited | Financial services | 2022 |
| Devoncctv Ltd | Administrative & support | 2021 |
| Devonline Security Group Ltd | Administrative & support | 2025 |
| Devonshire New Builds Ltd | Construction | 2025 |
| Diplomat Devon Ltd | Health & social care | 2010 |
| Diskingdom Limited | Education | 2021 |
| Dive Centre Ltd | Arts & recreation | 1998 |
| Dive School Limited | Professional & scientific | 2003 |
| DJ Elliott Consulting Ltd | Information & communication | 2015 |
| DJC Stonemasons Limited | Manufacturing | 2003 |
| Djdb Holdings Limited | Financial services | 2026 |
| DJL Construction (SW) Limited | Construction | 2018 |
| DL Building & Maintenance Limited | Other services | 2023 |
| DOS 1975 Ltd | Hospitality | 2025 |
| Dragonflies Motion Picture Ltd | Information & communication | 2026 |
| Dragonshifty Studios Ltd | Information & communication | 2023 |
| Drains R US Ltd | Administrative & support | 2009 |
| Dreams Holding Co Limited | Financial services | 2025 |
| Drivers Choice (Exeter) Limited | Wholesale & retail | 2016 |
| Dskl Mortgages Ltd | Financial services | 2020 |
| E J Gems Limited | Arts & recreation | 2024 |
| E.L.G. (Special Projects) Limited | Manufacturing | 2006 |
| Eastbrook House Management Company Limited | Households | 2001 |
| ECG Smile Limited | Health & social care | 2025 |
| Eco Training UK Ltd | Professional & scientific | 2022 |
| Eden Loweth Limited | Wholesale & retail | 2021 |
| Education 720 Ltd | Education | 2024 |
| EDV (Torquay) Ltd | Hospitality | 2016 |
| Electrow Contracting Ltd | Construction | 2015 |
| Elgar Riverside Ltd. | Real estate | 2016 |
| Elite Golf Ltd | Arts & recreation | 2003 |
| Elite Heat Solutions Ltd | Construction | 2026 |
| Emazweni Import Export & Trade Ltd | Transport & logistics | 2026 |
| Embrize Natural Resources Limited | Agriculture & fishing | 2014 |
| EMC Mediation Services Limited | Financial services | 2020 |
| Eminence Portfolio Ltd | Construction | 2017 |
| Emro Associates Limited | Professional & scientific | 1997 |