| Coastal House Limited | Real estate | 2015 |
| Coastal Living Holidays Limited | Hospitality | 2023 |
| Coleshill & District Investment Company Limited | Real estate | 1960 |
| Coltharts of Chepstow Limited | Construction | 2001 |
| Contract Cleaners Dartmouth Ltd | Administrative & support | 2018 |
| Cooltech Ice Blasting Ltd | Administrative & support | 2025 |
| Copy KAT Creative Ltd | Professional & scientific | 2014 |
| Counting Clouds Sleep Ltd | Health & social care | 2025 |
| Courgette (Brimble) Limited | Real estate | 2025 |
| Courgette (Hollins) Limited | Real estate | 2025 |
| Courgette (Unit 2) Limited | Real estate | 2025 |
| Courgette (Unit 4) Limited | Real estate | 2025 |
| Courgette Limited | Real estate | 2021 |
| Courgette Services Limited | Real estate | 2022 |
| Cowls Property Ltd | Real estate | 2021 |
| Craig DOT COM Limited | Other services | 2018 |
| Creekside Limited | Manufacturing | 2019 |
| CT Lodge Limited | Real estate | 2021 |
| Current Flow Solutions Ltd | Construction | 2024 |
| Curry House Devon Ltd | Hospitality | 2026 |
| Curtains by MAX Buston Ltd | Manufacturing | 2025 |
| D.E. Vernon Violins Limited | Wholesale & retail | 2010 |
| Danlichar Limited | Hospitality | 2025 |
| Dart Auto Ltd | Wholesale & retail | 2019 |
| Dart Bathrooms Limited | Wholesale & retail | 2008 |
| Dart Catering Services Limited | Professional & scientific | 1986 |
| Dart Consulting Ltd | Professional & scientific | 2019 |
| Dart Digital Media Ltd | Administrative & support | 2014 |
| Dart House Limited | Households | 1996 |
| Dart Music Festival Limited | Arts & recreation | 2008 |
| Dart Plant Services Ltd | Construction | 2020 |
| Dart Surfacing Ltd | Construction | 2019 |
| Dart Valley Cottages Limited | Real estate | 2012 |
| Darthaven Marina Limited | Manufacturing | 1975 |
| Darthaven Services Limited | Extraterritorial | 2023 |
| Darthaven Services Plymouth Limited | Extraterritorial | 2023 |
| Dartmouth and District Indoor Pool Trust | Arts & recreation | 2008 |
| Dartmouth Area Sports Hub C.I.C. | Arts & recreation | 2024 |
| Dartmouth Authentic Spice Limited | Hospitality | 2023 |
| Dartmouth Boating & Angling Company Limited | Real estate | 1970 |
| Dartmouth Carpentry Company Limited | Manufacturing | 2026 |
| Dartmouth Fine Foods Limited | Manufacturing | 2012 |
| Dartmouth Flooring Company Limited | Administrative & support | 2017 |
| Dartmouth Hair Limited | Other services | 2019 |
| Dartmouth Hemp Company Ltd | Wholesale & retail | 2021 |
| Dartmouth Home and Hardware Ltd | Wholesale & retail | 2019 |
| Dartmouth Kitchens & Interiors Ltd | Professional & scientific | 2017 |
| Dartmouth Pizza Co Ltd | Hospitality | 2023 |
| Dartmouth Pride UK CIC | Other services | 2024 |
| Dartmouth Swimming Pool Company Limited | Arts & recreation | 1987 |
| Dartmouth Tourism & Business Hub CIC | Administrative & support | 2024 |
| Dartmouth Trading Company Limited | Wholesale & retail | 1999 |
| Deegan IT Services Ltd | Information & communication | 2015 |
| Deer Combe Management Company Limited | Households | 2002 |
| Deju Blue Ltd | Real estate | 2019 |
| Demon Ribs Ltd | Manufacturing | 2015 |
| Derbyshire Enterprise Ltd | Hospitality | 2023 |
| Devon & Cornwall Epcs Limited | Professional & scientific | 2015 |
| Devon Marine Electronics Limited | Manufacturing | 2015 |
| Devon Optometry Limited | Health & social care | 2015 |
| Devon Stays Limited | Hospitality | 2020 |
| Devon's Wild Wood Ltd | Manufacturing | 2017 |
| Distillique Limited | Wholesale & retail | 2025 |
| Distinctly Living Ltd | Wholesale & retail | 2019 |
| Dockingwand Ltd | Wholesale & retail | 2020 |
| Dog Tales Club Ltd | Agriculture & fishing | 2020 |
| DTC Retreats Ltd | Agriculture & fishing | 2025 |
| DTC Youth Theatre CIC | Arts & recreation | 2025 |
| Duckyducks Ltd | Wholesale & retail | 2026 |
| DUO Interior Design Ltd | Manufacturing | 2010 |
| Dynamic Solutions (Croydon) Limited | Wholesale & retail | 2012 |
| E Thatcher T/A EBB Limited | Other services | 2009 |
| E&R Psychology Ltd. | Other services | 2024 |
| E.H. Ferris & SON Limited | | 1963 |
| EBB & Flow Cafe Ltd | Hospitality | 2022 |
| Eliza Price Interiors Limited | Professional & scientific | 2022 |
| Elliott Construction EC Ltd | Construction | 2024 |
| ELM Developments (SW) Ltd | Construction | 2021 |
| Elma Properties Ltd | Real estate | 2023 |
| ELT Building Contractors Limited | Construction | 2015 |
| Embridge Limited | Real estate | 2002 |
| Emote Consulting Limited | Professional & scientific | 2021 |
| Employer Advice Ltd | Administrative & support | 2013 |
| Endsleigh Court Management Limited | Households | 2006 |
| Energy Music Limited | Information & communication | 2020 |
| Engravables Limited | Manufacturing | 2015 |
| Eq-Iq Sales & Marketing Ltd | Information & communication | 2022 |
| Eumundi Limited | Real estate | 2014 |
| Eurosafe Limited | Administrative & support | 1988 |
| Evergrove Properties Ltd | Real estate | 2025 |
| Evie Kelleher Limited | Arts & recreation | 2024 |
| Exclusive Link Ltd | Information & communication | 2020 |
| Exercise Tiger Memorial Ltd. | Administrative & support | 2005 |
| Extracover Consulting Limited | Professional & scientific | 2026 |
| Fastask Limited | Wholesale & retail | 2025 |
| FG Hospitality Limited | Wholesale & retail | 2021 |
| Fin-Tec Consultancy Ltd | Professional & scientific | 2025 |
| Fine Violins Limited | Wholesale & retail | 2003 |
| Ford Management (Dartmouth) Limited | Real estate | 1999 |
| Ford Valley Property Maintenance and Cleaning Services Ltd | Administrative & support | 2025 |