| Drammen Works AS | Professional & scientific | 2021 |
| Drammen Yard AS | Manufacturing | 1986 |
| Drammen Yard Leasing AS | Professional & scientific | 2024 |
| Drammen Zoo Center AS | Wholesale & retail | 2025 |
| Drammen Øre-Nese-Hals-Senter Da | Health & social care | 2004 |
| Drammen Øyelegesenter AS | Health & social care | 2012 |
| Drammen's Røkeri AS | Manufacturing | 2016 |
| Drammens Armaturfabrik AS | Real estate | 1994 |
| Drammens Gynekologen AS | Health & social care | 2014 |
| Drammens Tidende AS | Information & communication | 1966 |
| Drammensveien 1 AS | Real estate | 2013 |
| Drammensveien 3 AS | Real estate | 2015 |
| Drammensveien 64 Eiendom AS | Real estate | 2017 |
| Dreamzone Holding AS | Wholesale & retail | 2022 |
| Dreibrueder Nor AS | Real estate | 2017 |
| Drevent AS | Administrative & support | 2018 |
| Dreyer Capital AS | Financial services | 2018 |
| Drikkepartner AS | Real estate | 2011 |
| Driv Performance AS | Wholesale & retail | 2026 |
| Drive in Bilpleie AS | Other services | 2021 |
| Driving Trafikkskole Drammen AS | Education | 2014 |
| DRM Holding AS | Arts & recreation | 2009 |
| DRM Medisinske Holding AS | | 2026 |
| Drma AS | Professional & scientific | 2003 |
| Dronninggata 17 AS | Real estate | 2022 |
| Dronninggata 1B AS | Real estate | 2017 |
| Dronninggata 2 AS | Real estate | 2019 |
| Druckerei Service Nordic AS | | 2001 |
| Dråpen 6 Eiendom AS | Real estate | 2018 |
| Dråpen 9 AS | Real estate | 2018 |
| Dråpen Holding AS | Real estate | 2018 |
| Drømme Huset AS | Construction | 2023 |
| Drømmerom AS | Wholesale & retail | 2024 |
| Drømmerom Holding AS | Real estate | 2017 |
| DS Consulting AS | Health & social care | 2013 |
| DSG Technology AS | Professional & scientific | 2006 |
| DSG Technology Holding AS | Real estate | 2020 |
| Dsoft AS | Information & communication | 2026 |
| DT Regnskap AS | Professional & scientific | 2015 |
| Dtbb Investering AS | | 2018 |
| DTX Systems AS | Professional & scientific | 2024 |
| Ducivata AS | Real estate | 2019 |
| Dugnad På 1-2-3 AS | Wholesale & retail | 2017 |
| Durable Invest AS | | 2022 |
| Duric Transport AS | Transport & logistics | 2008 |
| Durniplot AS | | 2020 |
| Duscholux Norge AS | Wholesale & retail | 2016 |
| Duval Invest AS | Real estate | 1998 |
| Dvalinn AS | Wholesale & retail | 2025 |
| DVK Eiendomsdrift AS | Administrative & support | 2025 |
| DVK Eiendomsdrift Oslo AS | Administrative & support | 2026 |
| DVK Gruppen AS | | 2026 |
| DVK Holdco AS | | 2025 |
| DVM Bygg AS | Construction | 2021 |
| Dynamic Engineering AS | Professional & scientific | 2017 |
| Dynamic Fisheye AS | Professional & scientific | 2022 |
| Dynastiet Restaurant AS | Hospitality | 2006 |
| Dynocean AS | | 2020 |
| Dyrlege Rudi AS | Professional & scientific | 2021 |
| Dyrlegen Rett Hjem AS | Professional & scientific | 2025 |
| Dyrvil Eiendom AS | Real estate | 2021 |
| Dyrvil Invest AS | Real estate | 2015 |
| Dystopia AS | Wholesale & retail | 2023 |
| Dølasletta 6 AS | Real estate | 1995 |
| Dør & Vindu Drammen AS | Wholesale & retail | 2014 |
| E Helling Invest AS | | 2025 |
| E Regnskap & Forvaltning AS | Professional & scientific | 2009 |
| E-Mexx AS | Other services | 2021 |
| E-Volution Norge AS | Wholesale & retail | 2025 |
| E-Wheels Norge AS | Wholesale & retail | 2014 |
| E. Helmen AS | Administrative & support | 2018 |
| E.B. Siem Invest AS | Real estate | 2024 |
| E.Haukeland AS | Agriculture & fishing | 2022 |
| E.K.S Holding AS | | 2015 |
| Eaarnes Holding AS | | 2026 |
| Eastbound Shipping Company Ltd | | 2001 |
| Eastern Travel & Tours AS | Administrative & support | 2003 |
| Easy Self-Storage AS | Real estate | 2011 |
| Easylife Norge AS | Education | 2003 |
| Easylution AS | Information & communication | 2002 |
| Easypeasy Regnskap AS | Information & communication | 2025 |
| Easyrepair AS | Other services | 2022 |
| Easywrite AS | Information & communication | 2021 |
| Eb Filtbygg AS | | 2021 |
| Ebj AS | Professional & scientific | 2023 |
| Eboost AS | Professional & scientific | 2015 |
| Ebs Eiendom AS | Real estate | 2024 |
| Ecit Peritus AS | Information & communication | 1996 |
| Ecit Solutions AS | Information & communication | 2018 |
| Ecn Management AS | Professional & scientific | 2023 |
| Eco Ready Hus AS | Construction | 2014 |
| Eco-Nor AS | Wholesale & retail | 2017 |
| Eco-Nor Engineering AS | Professional & scientific | 2025 |
| Eco-Nor Utleie AS | Administrative & support | 2018 |
| Ecomx AS | Professional & scientific | 2017 |
| Econtainer AS | Wholesale & retail | 2025 |
| Ecopros AS | Administrative & support | 2004 |
| Edin Invest AS | Professional & scientific | 2018 |
| Edra Byggservice AS | Construction | 2024 |
| Edra Eiendom AS | Real estate | 2019 |