| Detoyceutics & Services Limited | Professional & scientific | 2023 |
| Devere Motor Company Ltd | Wholesale & retail | 2023 |
| Devigmat Limited | Other services | 2022 |
| Devington Park Management Company Limited | Households | 2001 |
| Devlex (Newton Abbot) Limited | Administrative & support | 1979 |
| Devon and Cornwall Lettings Ltd | Real estate | 2019 |
| Devon and Somerset Law Society | Other services | 1926 |
| Devon Arms Ltd | Hospitality | 2024 |
| Devon Brewing Company Ltd | Extraterritorial | 2020 |
| Devon Compartmentation Ltd | Construction | 2024 |
| Devon Court Hotel Torquay LLP | | 2020 |
| Devon Croft Management Company Limited | Households | 1989 |
| Devon Dental Laboratories Limited | Health & social care | 2007 |
| Devon Design and Build Ltd | Construction | 2024 |
| Devon Distillery Limited | Manufacturing | 2012 |
| Devon Dog Behaviour Rehab and Rehome C.I.C. | Professional & scientific | 2013 |
| Devon Eco Pallets Limited | Water & waste | 2021 |
| Devon Electrical Services Ltd | Construction | 2016 |
| Devon Enabling Services Ltd. | Health & social care | 2014 |
| Devon Enabling Services PCN Ltd | Health & social care | 2018 |
| Devon Farm Kitchen Ltd | Hospitality | 2019 |
| Devon Flavours Limited | Other services | 2025 |
| Devon Football League Limited | Arts & recreation | 2019 |
| Devon Fresh Limited | Wholesale & retail | 2010 |
| Devon Fresh Mart Limited | Wholesale & retail | 2023 |
| Devon Garden Machinery Holdings Limited | Financial services | 2026 |
| Devon Garden Machinery Limited | Financial services | 2007 |
| Devon Golf Limited | Arts & recreation | 2016 |
| Devon Pole Dance Ltd | Education | 2022 |
| Devon Radiology Limited | Health & social care | 2017 |
| Devon Rise Construction Ltd | Construction | 2026 |
| Devon Riviera Homes Limited | Professional & scientific | 1984 |
| Devon Scallops Limited | Agriculture & fishing | 2023 |
| Devon Tea Company Limited | Wholesale & retail | 2012 |
| Devon Tree Services Limited | Agriculture & fishing | 2013 |
| Devon Vein Solutions Ltd | Health & social care | 2011 |
| Devoncourt Limited | Real estate | 1983 |
| Devondale Court Residents Company Limited | Households | 1985 |
| Devonshire Bakes Limited | Wholesale & retail | 2021 |
| Devonshire House Management Limited | Households | 1989 |
| Devonshire Renewables Ltd | Construction | 2025 |
| Devonview Freehold Company Limited | Real estate | 2004 |
| Devonview Residents Company Limited | Households | 1988 |
| Devrim Kebab Ltd | Hospitality | 2023 |
| Dfbuilding Limited | Construction | 2008 |
| DG Accountancy Ltd | Professional & scientific | 2024 |
| DGM Limited | Wholesale & retail | 2005 |
| DH Pipelines Limited | Mining & quarrying | 2023 |
| DHP Site Management Limited | Professional & scientific | 2017 |
| Dialed in Automotive Ltd | Wholesale & retail | 2024 |
| Diamond Shine Domestic Cleaning Services Ltd | Administrative & support | 2022 |
| Dicerick Ltd | Hospitality | 2009 |
| Dien 1983 Ltd | Hospitality | 2025 |
| Diesel Works Limited | Extraterritorial | 2010 |
| Digi Books Devon Limited | Professional & scientific | 2017 |
| Digital Accounts Limited | Extraterritorial | 2015 |
| Digital Diva Ltd | Manufacturing | 2026 |
| Digital Molen Ltd | Information & communication | 2025 |
| Digital Neds Ltd | Professional & scientific | 2022 |
| Digital Ticketing Systems Limited | Information & communication | 2009 |
| Dimora Living Ltd | Real estate | 2023 |
| Direct Carpet & Curtain Supplies Limited | Wholesale & retail | 2000 |
| Direct Self Storage (Newton Abbot) Limited | Real estate | 2023 |
| Disabled Sailing Association Ltd | Arts & recreation | 2005 |
| Disastercare Southwest Ltd | Administrative & support | 2026 |
| Diverse Fitness Torbay Ltd | Arts & recreation | 2018 |
| DJ Carpets Limited | Wholesale & retail | 2003 |
| DJN Technical Solutions Ltd | Professional & scientific | 2021 |
| DJP Rental Properties Ltd | Real estate | 2020 |
| DJR Decorators (Torquay) Ltd | Construction | 2022 |
| DJR London Ltd | Construction | 2025 |
| DL Bentley Limited | Real estate | 2020 |
| DLK Groundworks Ltd | Construction | 2015 |
| DM Property Exeter Ltd | Real estate | 2026 |
| DM Torbay Properties Ltd | Real estate | 2026 |
| Dmfh Limited | Agriculture & fishing | 2007 |
| Dnes Productions Ltd | Information & communication | 2025 |
| Doble Vintage Watches Limited | Wholesale & retail | 2025 |
| Dock Torquay Ltd | Hospitality | 2024 |
| Dolled UP Beauty Southwest Ltd | Other services | 2024 |
| Dolphin Court (Powderham Terrace) Management Company Limited | Real estate | 1982 |
| Dominique Tande Limited | Health & social care | 2015 |
| Doriq Limited | Information & communication | 2009 |
| Dorridge Cleaning Services Limited | Other services | 2003 |
| Douglas Court Right to Manage Company Limited | Households | 2024 |
| Doverhay Management Ltd | Households | 2003 |
| Dowricks Chemist of Chelston Hall Limited | Wholesale & retail | 2008 |
| DPC1 Limited | Hospitality | 2022 |
| DR Faye J Fursdon Ltd | Health & social care | 2025 |
| DR Mihaela Costache Ltd | Health & social care | 2010 |
| DR Sally Health and Wellbeing Limited | Health & social care | 2026 |
| Draco Ursus Limited | Administrative & support | 2022 |
| Draincure (SW) Limited | Water & waste | 2005 |
| Drakes Court (1998) Management Company Limited | Households | 1998 |
| Drawincad Ltd | Professional & scientific | 2014 |
| Dream Lofts South West Limited | Construction | 2019 |
| Drew Peters Limited | Manufacturing | 1995 |
| Drip the Pitch Ltd | Wholesale & retail | 2025 |
| Drive Factor Ltd | Information & communication | 2026 |
| Drone Alone Ltd | Professional & scientific | 2024 |