| DO Good Coffee Ltd | Manufacturing | 2021 |
| Doctor Brothers Ltd | Health & social care | 2025 |
| Dodgems & Floss Limited | Information & communication | 2014 |
| Dog Pizza Ltd | Manufacturing | 2025 |
| Dog Store & Spa Ltd | Other services | 2022 |
| Dog Treat Box Ltd | Wholesale & retail | 2025 |
| Doglaw Limited | Education | 2009 |
| Dominglowringsuk Ltd | Manufacturing | 2022 |
| Donaulied Engineering Ltd | Professional & scientific | 2017 |
| Donnajobs Ltd | Other services | 2018 |
| Donnelly (Kent) Ltd | Wholesale & retail | 2011 |
| Doorslam Ltd | Education | 2026 |
| Doug Marriott Associates Ltd | Other services | 2006 |
| Dougla Kitchen and Coffee Ltd | Hospitality | 2026 |
| Dove Health and Care Ltd. | Administrative & support | 2019 |
| Dover 1 Limited | Real estate | 2026 |
| Dover Road Management Company Limited | Households | 2007 |
| Dover Rugby Football Club Limited | Arts & recreation | 2013 |
| Downs Installations Limited | Construction | 2002 |
| Downs Plumbing & Heating Limited | Other services | 2019 |
| Downtown Packaging Ltd | Administrative & support | 2026 |
| Doxisdj Ltd | Arts & recreation | 2022 |
| DPH Medical Supplies Ltd | Wholesale & retail | 2018 |
| DPL Leisure Limited | Professional & scientific | 2020 |
| DR Amita Aesthetics Limited | Health & social care | 2024 |
| DR Anika N Patel Limited | Health & social care | 2020 |
| DR KE Properties Limited | Real estate | 2016 |
| DR Lisa Delamaine Ltd | Education | 2023 |
| DR Rohan N Patel Limited | Other services | 2020 |
| DR Sango Limited | Wholesale & retail | 2018 |
| DR Sophie Consulting Ltd | Health & social care | 2024 |
| DR Susannah Baron Ltd | Health & social care | 2016 |
| DRA Collectibles Ltd | Wholesale & retail | 2026 |
| Dragon City Ltd | Hospitality | 2026 |
| Drai BON Enterprise Limited | Professional & scientific | 2016 |
| Drakes Tidy Gardens Limited | Administrative & support | 2023 |
| Dram and Mylar Ltd | Wholesale & retail | 2019 |
| Dramont Capital Ltd | Professional & scientific | 2024 |
| Dramont Investments II Ltd | Financial services | 2024 |
| Drayseywood Ltd | Professional & scientific | 2019 |
| Dream Charter Limited | Arts & recreation | 2013 |
| DRG Trans Services Ltd | Transport & logistics | 2024 |
| Dried Seafood Group Limited | Wholesale & retail | 2025 |
| Driftwood Living Ltd | Hospitality | 2026 |
| Driftwood Mews Managment Company Limited | Households | 2024 |
| Driven (Recruitment) Ltd | Administrative & support | 2002 |
| Driveway and Patio Kent Ltd | Administrative & support | 2025 |
| DRL Photography and Designs Limited | Professional & scientific | 2019 |
| Dropify Store Ltd | Wholesale & retail | 2025 |
| DRP International (UK) Ltd | Wholesale & retail | 2020 |
| DRS Enterprises Ltd | Financial services | 2023 |
| Drugscience Ltd | Professional & scientific | 2012 |
| Drugscience Trading Ltd | Professional & scientific | 2022 |
| Drury Logistics Limited | Hospitality | 2010 |
| DRW Architects Limited | Professional & scientific | 2003 |
| Drysdale Point Ltd | Transport & logistics | 2020 |
| DS Carpentry Roofing and Building Ltd | Construction | 2019 |
| Dsdi Limited | Professional & scientific | 2009 |
| DSP Consultancy Ltd | Information & communication | 2017 |
| Dtsn Ltd | Hospitality | 2016 |
| Dubai Shawarma & Grill Special Ltd | Hospitality | 2025 |
| Duck Duck Haus Limited | Professional & scientific | 2023 |
| Duggie Fields Ltd | Administrative & support | 2023 |
| Dunamis Services Limited | Health & social care | 2023 |
| Dunara Limited | Arts & recreation | 2026 |
| Duncan and Gorman Economics Ltd | Professional & scientific | 2023 |
| Dundas & Burgun Limited | Wholesale & retail | 2018 |
| Dundas Park Stud Limited | Agriculture & fishing | 2023 |
| Dunstans Kitchen Limited | Hospitality | 2025 |
| Dunsthorpe Limited | Other services | 1957 |
| DUO Tech Limited | Information & communication | 2026 |
| Duro Timber Products Limited | Manufacturing | 2013 |
| Duropave Limited | Construction | 2022 |
| Durovernum Court Management Company Limited | Households | 1991 |
| Dwaraka Diagnostics Ltd | Health & social care | 2020 |
| DWJ Roofing and Property Solutions Ltd | Construction | 2024 |
| Dynamix Consultancy Limited | Professional & scientific | 2008 |
| E Dyer Property Management Limited | Real estate | 1988 |
| E. T. Butcher Limited | Agriculture & fishing | 2008 |
| E.T. Butcher Holdings Limited | Financial services | 2024 |
| Eagle One Transport Ltd | Transport & logistics | 2019 |
| Ealham Property Limited | Real estate | 2026 |
| Early Grip Medical Service Limited | Health & social care | 2023 |
| Earlybird Cards & Gifts Ltd | Wholesale & retail | 2025 |
| Earlybird Designs Limited | Wholesale & retail | 2003 |
| Earthstone Landscapes Limited | Administrative & support | 2014 |
| Earwigs Ltd | Wholesale & retail | 2025 |
| Easeground Limited | Agriculture & fishing | 1991 |
| Easitect Limited | Information & communication | 2018 |
| East Kent Asbestos Services Ltd | Construction | 2024 |
| East Kent Automotive Limited | Wholesale & retail | 2013 |
| East Kent Growers Ltd | Wholesale & retail | 2023 |
| East Kent Marketing Ltd | Administrative & support | 2008 |
| East Kent Plumbing and Heating Limited | Construction | 2015 |
| East Kent Properties Limited | Administrative & support | 2001 |
| East Kent Renewables Limited | Construction | 2023 |
| East Kent Therapy Rehabilitation Alliance Limited | Health & social care | 2007 |
| East Kent Timber Limited | Manufacturing | 1993 |
| East Kent Timber Property Development Limited | Construction | 2022 |
| East Kent Travel Ltd | Transport & logistics | 2023 |