| Diesen Invest AS | | 2021 |
| Digitalit AS | Information & communication | 2026 |
| Din Allsidige Vaktmester AS | Administrative & support | 2022 |
| Din Båtsmann AS | Manufacturing | 2021 |
| Dinbursdag.No Ans | Wholesale & retail | 1990 |
| Direkte Elektro AS | Construction | 2014 |
| Discfinder AS | Manufacturing | 2023 |
| Djerv Invest AS | Wholesale & retail | 2006 |
| Dkdf AS | Health & social care | 2016 |
| DM Prosjekter AS | Manufacturing | 2014 |
| DN Capital AS | | 2025 |
| Dnda AS | Professional & scientific | 2017 |
| Dognvill Holding AS | Hospitality | 2018 |
| Doit Invest AS | Wholesale & retail | 1990 |
| Doktor!Doktor! AS | Health & social care | 2021 |
| DR Hår AS | Other services | 2013 |
| DR. Winje Klinikk AS | Health & social care | 2026 |
| DR. Winje Publishing AS | Education | 2026 |
| Dr.Winje Invest AS | | 2026 |
| Dr.Øbak Da | Arts & recreation | 2009 |
| Dregelid Holding AS | | 2024 |
| Druehaven AS | | 2021 |
| Drøbak Arkitektkontor AS | Professional & scientific | 1987 |
| Drøbak Bad AS | Construction | 2018 |
| Drøbak Badstue AS | Administrative & support | 2024 |
| Drøbak Bil Rep Carozzeria Alfa AS | Other services | 2007 |
| Drøbak Bilpleie- Og Dekksenter Da | Other services | 2013 |
| Drøbak Båtservice AS | Manufacturing | 2012 |
| Drøbak Dekk Og Felg AS | Other services | 2008 |
| Drøbak Dekkservice AS | Other services | 2023 |
| Drøbak Eiendom AS | Real estate | 1996 |
| Drøbak Eiendomsinvest AS | Real estate | 1995 |
| Drøbak Flis AS | Wholesale & retail | 1997 |
| Drøbak Golfhus AS | Arts & recreation | 1993 |
| Drøbak Hagesenter AS | Wholesale & retail | 1998 |
| Drøbak Hundehotell Drift AS | Agriculture & fishing | 2020 |
| Drøbak Legesenter AS | Health & social care | 2013 |
| Drøbak Malermesterservice AS | Construction | 2006 |
| Drøbak Marineservice AS | Construction | 2012 |
| Drøbak Maritime Og Elektroforretning Ans | Construction | 1995 |
| Drøbak Markiseservice Ans | Wholesale & retail | 1995 |
| Drøbak Medisinske Hudpleie AS | Other services | 2017 |
| Drøbak Micro-Snekkeri AS | Manufacturing | 2020 |
| Drøbak Minigraver Da | Administrative & support | 2018 |
| Drøbak Montessori Barnehage AS | Education | 2023 |
| Drøbak Montessori Barneskole AS | Education | 2024 |
| Drøbak Montessori Ungdomsskole AS | Education | 2008 |
| Drøbak Motehus AS | Wholesale & retail | 1988 |
| Drøbak Næringspark AS | Real estate | 2006 |
| Drøbak Pubdrift AS | Hospitality | 2015 |
| Drøbak Restaurant & Catering Selskap AS | Hospitality | 2011 |
| Drøbak Rib Safari AS | Transport & logistics | 2022 |
| Drøbak Rørleggerservice AS | Construction | 1987 |
| Drøbak Smådyrklinikk AS | Professional & scientific | 2012 |
| Drøbak Stillas AS | Construction | 2023 |
| Drøbak Tannlegesenter Da | Health & social care | 2005 |
| Drøbak Tannlegevakt AS | Health & social care | 2023 |
| Drøbak Trafikkskole AS | Education | 2020 |
| Drøbak Tømrerservice AS | Construction | 2008 |
| Drøbak Vaskeri AS | Health & social care | 1992 |
| Drøbak Vertshus AS | Hospitality | 2026 |
| Drøbak Vinterland AS | Administrative & support | 2026 |
| Drøbak Øre Nese Hals AS | Health & social care | 2012 |
| Drøbakfestivalen AS | Arts & recreation | 2012 |
| Drøye Bakker AS | Wholesale & retail | 2021 |
| DS Follo AS | Real estate | 2017 |
| DT - Klinikk AS | Health & social care | 2006 |
| Dumas Holding AS | Real estate | 2015 |
| Duo 2 AS | Real estate | 2015 |
| Durkan Agency AS | Professional & scientific | 2015 |
| Dus AS | Financial services | 2005 |
| DV Invest AS | Real estate | 2019 |
| Dynamic Products AS | Wholesale & retail | 2025 |
| Dyrdal Naprapati Og Helhetlig Helse AS | Health & social care | 2013 |
| Dyrli-Juul Holding AS | Wholesale & retail | 2002 |
| Dyrløkke AS | | 2013 |
| Dyrløkke Drøbak AS | Real estate | 2015 |
| Dyrløkkeveien 27 AS | Real estate | 1973 |
| Døgnvill Dagligvare AS | Wholesale & retail | 2020 |
| E-Berntsen Holding AS | | 2024 |
| E-Volve AS | Information & communication | 2013 |
| E.A Holding AS | | 2020 |
| E.J. Martinsen AS | Transport & logistics | 2017 |
| E12NNI AS | Professional & scientific | 2013 |
| Easy Touch AS | Wholesale & retail | 2017 |
| Eata AS | Wholesale & retail | 1995 |
| Educational Storytelling Forlag Og Film AS | Information & communication | 2015 |
| Eepp AS | Professional & scientific | 2007 |
| Effektlab AS | Professional & scientific | 2024 |
| Efffekt AS | Information & communication | 2026 |
| Eic Gruppen AS | Professional & scientific | 2005 |
| Eic Oil & Gas AS | Professional & scientific | 2009 |
| Eidsvold Invest AS | Real estate | 2010 |
| Eiendomsformidling Norge AS | Real estate | 1988 |
| Eikerol Holding AS | | 2019 |
| Eikvin AS | Financial services | 2005 |
| Eirik Lande Eiendom AS | Real estate | 2013 |
| Ej Tunnels AS | Construction | 2021 |
| Ek-Co Maskinforretning AS | Wholesale & retail | 2003 |
| Ekrem Project Management and Consulting AS | Professional & scientific | 2013 |