| Designwithbloom Ltd | Professional & scientific | 2024 |
| Dessy Care Services Limited | Health & social care | 2014 |
| Destination 66 Limited | Professional & scientific | 2012 |
| Destination Digital Ltd | Other services | 2017 |
| DEV Smilecare Ltd | Health & social care | 2017 |
| Developme Training Limited | Education | 2014 |
| Devine Hands Limited | Health & social care | 2025 |
| Devon & Cornwall Autistic Community Trust | Health & social care | 1982 |
| Devon & Cornwall Cleaning Services Ltd | Administrative & support | 2022 |
| Devon & Exeter Laser Ltd | Other services | 2024 |
| Devon Air Ambulance Trust | Transport & logistics | 1999 |
| Devon and Cornwall Sealants Limited | Construction | 2015 |
| Devon Applied Arts Workshop Ltd | Education | 2018 |
| Devon Aquatics Ltd | Wholesale & retail | 2025 |
| Devon Artist Network Limited | Arts & recreation | 2007 |
| Devon Arts in Schools Initiative | Education | 1998 |
| Devon Automobiles Limited | Wholesale & retail | 2018 |
| Devon Baits Limited | Agriculture & fishing | 2009 |
| Devon Bathrooms Ltd | Construction | 1996 |
| Devon Beeswax Wrap Co Ltd | Wholesale & retail | 2023 |
| Devon Brothers Ltd | Financial services | 2023 |
| Devon Building Ltd | Construction | 2025 |
| Devon Car Keys Ltd | Other services | 2018 |
| Devon Car Sales Ltd | Wholesale & retail | 2025 |
| Devon Carpentry Ltd | Construction | 2023 |
| Devon Chamber of Commerce Limited | Administrative & support | 2024 |
| Devon Communities Together | Professional & scientific | 2015 |
| Devon Consultants Ltd. | Health & social care | 2018 |
| Devon Consulting Engineers Ltd | Professional & scientific | 2025 |
| Devon Contractors (Topco) Limited | Financial services | 2024 |
| Devon Country Homes Ltd | Real estate | 2025 |
| Devon County Association for the Blind | Other services | 2010 |
| Devon County Athletic Ground Company,Limited(The) | Arts & recreation | 1893 |
| Devon Cricket Foundation | Arts & recreation | 2009 |
| Devon Cycle Hire Ltd | Administrative & support | 2020 |
| Devon Deans Transport Ltd | Other services | 2024 |
| Devon Decorators Limited | Construction | 2018 |
| Devon Deli Ltd | Hospitality | 2025 |
| Devon Delicious Limited | Manufacturing | 2019 |
| Devon Development Education | Education | 2003 |
| Devon DIG and Donate CIC | Agriculture & fishing | 2024 |
| Devon Digging Services Ltd | Construction | 2024 |
| Devon Disability Collective Limited | Manufacturing | 2015 |
| Devon Distribution Ltd | Wholesale & retail | 2025 |
| Devon Dog House Ltd | Hospitality | 2021 |
| Devon Dogs Limited | Other services | 2007 |
| Devon Driveways Ltd | Construction | 2025 |
| Devon Dropped Kerbs and Driveways Ltd | Administrative & support | 2016 |
| Devon Dvds Ltd | Wholesale & retail | 2023 |
| Devon Edge Ltd | Construction | 2025 |
| Devon Educational Holidays Limited | Education | 2023 |
| Devon Electrical & Property Services Limited | Energy | 2019 |
| Devon Energy Collective CIC | Administrative & support | 2020 |
| Devon Energy Ltd | Construction | 2020 |
| Devon Forklift Services Limited | Manufacturing | 2015 |
| Devon Fuel Associates Ltd. T/A Servicetech South West Partnership | | 2003 |
| Devon Fuel Associates Ltd. T/A Servicetech South West Partnership | | 2003 |
| Devon Fuel Associates Ltd. T/A Servicetech South West Partnership | | 2003 |
| Devon Fuel Associates Ltd. T/A Servicetech South West Partnership | | 2003 |
| Devon Fuel Associates Ltd. T/A Servicetech South West Partnership | | 2003 |
| Devon Fuel Associates Ltd. T/A Servicetech South West Partnership | | 2003 |
| Devon Fuel Associates Ltd. T/A Servicetech South West Partnership | | 2003 |
| Devon Fuel Associates Ltd. T/A Servicetech South West Partnership | | 2003 |
| Devon Fuel Associates Ltd. T/A Servicetech South West Partnership | | 2003 |
| Devon Fuel Associates Ltd. T/A Servicetech South West Partnerships | | 2003 |
| Devon Gardens Trust | Arts & recreation | 1988 |
| Devon Historic Buildings Trust | Administrative & support | 1973 |
| Devon Holiday Comfort Breaks and Services Limited | Hospitality | 2025 |
| Devon Home Maintenance Limited | Construction | 2024 |
| Devon Indian Ltd | Hospitality | 2019 |
| Devon Interiors Limited | Professional & scientific | 2012 |
| Devon Landscaping Ltd | Administrative & support | 2023 |
| Devon Lets Ltd | Extraterritorial | 2023 |
| Devon Lifestyle Medicine Ltd | Health & social care | 2018 |
| Devon Made Ltd | Hospitality | 2022 |
| Devon Maintenance Plus Limited | Construction | 2001 |
| Devon Media Solutions Limited | Administrative & support | 2025 |
| Devon Minor Works Contractor Ltd | Construction | 1994 |
| Devon Mouldings Limited | Manufacturing | 2007 |
| Devon Orchard Ltd | Manufacturing | 2014 |
| Devon Oven Limited | Hospitality | 2024 |
| Devon Plumbing Solutions Limited | Construction | 2011 |
| Devon Property Holdings Ltd | Real estate | 2019 |
| Devon Property Limited | Construction | 2016 |
| Devon Property Management Limited | Real estate | 2019 |
| Devon Property Partners Limited | Real estate | 2024 |
| Devon Property Partnership Limited | Real estate | 2017 |
| Devon Recovery Service Limited | Extraterritorial | 2008 |
| Devon Renewables Ltd | Construction | 2024 |
| Devon Road Sweepers Limited | Construction | 2024 |
| Devon Roofing and Cladding Ltd | Construction | 2023 |
| Devon Running Company Ltd | Wholesale & retail | 2026 |
| Devon Shines Cleaning Services Ltd | Administrative & support | 2025 |
| Devon Smithy Ltd | Households | 2026 |
| Devon Sparks Ltd | Construction | 2018 |
| Devon Square Dent Ltd | Health & social care | 2021 |
| Devon Strings Limited | Manufacturing | 2014 |
| Devon Support Services Ltd | Administrative & support | 2021 |
| Devon Surfacing Limited | Administrative & support | 2021 |
| Devon Ukrainian Association CIC | Education | 2022 |