| DA Media Ltd | Information & communication | 2001 |
| Dacre Gardens Residents Company Limited | Households | 1995 |
| Daddydaniel Ltd | Wholesale & retail | 2025 |
| DAH DIT DIT Ltd | Professional & scientific | 2020 |
| DAH DIT DIT Music Ltd | Information & communication | 2021 |
| Dalby Cafe Ltd. | Hospitality | 1996 |
| Damp Diagnosis Consultancy Limited | Administrative & support | 2006 |
| Damreg Limited | Health & social care | 2015 |
| Dams Cafe Ltd | Hospitality | 2025 |
| Dance Show Productions Limited | Arts & recreation | 2006 |
| Dandyclose Limited | Manufacturing | 1986 |
| Dane Valley Fish Bar Limited | Hospitality | 2002 |
| Daniel Martin Investments Limited | Real estate | 2019 |
| Danielle.B Limited | Information & communication | 2012 |
| Daniels & Co (Accountants) Limited | Professional & scientific | 2005 |
| Daniels Motor Sport Ltd | Wholesale & retail | 2003 |
| Danijojo Services Ltd | Administrative & support | 2017 |
| Danique Limited | Wholesale & retail | 2005 |
| Dankeel Associates Limited | Professional & scientific | 2012 |
| Danson Angling Limited | Administrative & support | 2002 |
| Danson Associates Ltd | Administrative & support | 2008 |
| Dapplewell Limited | | 1982 |
| Darent (Consultants) Limited | Professional & scientific | 1995 |
| Dargan Construction Limited | Construction | 2000 |
| Dark Matter Limited | Administrative & support | 2007 |
| Darker Than Blue Limited | Information & communication | 1998 |
| Darren Parris Limited | Administrative & support | 2003 |
| Dartford Cabs Limited | Transport & logistics | 2006 |
| Dartford Coffee POT Ltd | Hospitality | 2017 |
| Dartford Metalcrafts Ltd | Administrative & support | 1996 |
| Dartford Removal Services Limited | Administrative & support | 2000 |
| Dartford Specsavers Limited | Wholesale & retail | 1994 |
| Dartford Stone Lodge Bowls & Social Clubs Limited | Arts & recreation | 1985 |
| Dartford Visionplus Limited | Wholesale & retail | 1994 |
| Dartpoint Limited | Manufacturing | 1981 |
| Dasco Electrical&Property Services Ltd | Construction | 2007 |
| Data Cert Ltd | Information & communication | 2016 |
| Data Initiative Limited | Professional & scientific | 1997 |
| Datamat (UK) Limited | | 1982 |
| Dave Bennett Group Limited | Financial services | 2019 |
| David C Osborne Limited | Construction | 2000 |
| David Clarke Estate Agents Limited | Real estate | 2003 |
| David Cowley Developments Limited | Construction | 2006 |
| David Goodworth Limited | Real estate | 2005 |
| David James Letting & Property Management Limited | Real estate | 2003 |
| David Payne & SON (Coach Builders) Limited | Wholesale & retail | 1972 |
| David Savage Erection and Engineering Services Limited | | 1974 |
| David Taylor Associates Consulting Limited | Professional & scientific | 1997 |
| David Tuff Limited | Construction | 2003 |
| David Wade Pool Care | | 1986 |
| Davies & Turner Carpentry Limited | Construction | 2007 |
| Davis Property Management Limited | Real estate | 2021 |
| Dawn Donaldson Ltd | Professional & scientific | 2003 |
| Daxfabrix Holding Limited | Professional & scientific | 2005 |
| Daxlab Limited | Administrative & support | 2005 |
| Day to Day Essential for Home I Ltd | Transport & logistics | 2025 |
| Daylight Academy | Education | 2009 |
| Daysol Ltd | Wholesale & retail | 2005 |
| DB Heating Solutions Ltd | Construction | 2023 |
| Dbmasters Ltd | Manufacturing | 2005 |
| DCF Flooring Specialist Ltd | Construction | 2019 |
| Dcjs Property Limited | Real estate | 2020 |
| DDG Group Holdings Ltd | Construction | 2021 |
| DE Drie Bronnen Ltd | Professional & scientific | 2007 |
| DE Graaf Railway Inventions Limited | Administrative & support | 2007 |
| DE Morgan College Limited | Extraterritorial | 1997 |
| Deacon & Sandys Limited | Manufacturing | 2000 |
| Deal Kent Properties Ltd | Real estate | 2024 |
| Deana Court Management Limited | Real estate | 1980 |
| Deanhouse (South East) Limited | Construction | 2005 |
| Debnams Ltd. | Construction | 2006 |
| Debug Options Limited | Professional & scientific | 2004 |
| Decade Services Limited | Wholesale & retail | 1996 |
| Decision Instruments Limited | Professional & scientific | 1999 |
| DEE KAY Leisure Limited | | 1982 |
| Deep South Trading Limited | Real estate | 1994 |
| Deepside Engineering Limited | | 1981 |
| Delbray Limited | Real estate | 2001 |
| Delmergate Holdings Limited | Financial services | 2018 |
| Delta Automotive Limited | | 1980 |
| Deltafirst Properties Limited | Real estate | 1994 |
| Denbridge (Dartford) Limited | Professional & scientific | 1964 |
| Denbuild Limited | Construction | 2007 |
| Dent-Ability Limited | Wholesale & retail | 2004 |
| Dental Plastics Co Limited | Manufacturing | 2000 |
| Dentax Limited | | 1978 |
| Denton Builders Limited | Construction | 1954 |
| DEO Media Limited | Financial services | 2024 |
| Deos Shop N Save Limited | Wholesale & retail | 2002 |
| DEP Pipes Limited | Manufacturing | 2002 |
| Dering Homes (Bethersden) Limited | Construction | 2026 |
| Dersim 62 Ltd | Wholesale & retail | 2020 |
| Desh Consulting Ltd | Professional & scientific | 2017 |
| Design & Visual Concepts Limited | Manufacturing | 2001 |
| Design for Life Limited | Manufacturing | 1995 |
| Design Plus (Kent) Limited | Professional & scientific | 2004 |
| Designed Storage Limited | Construction | 1981 |
| Designpearl Property Management Limited | Households | 2001 |
| Devineshore Limited | Other services | 2012 |
| Devkipharm Limited | Wholesale & retail | 1996 |