| Datasteel Topco AS | Information & communication | 2024 |
| DBP Eiendom AS | Real estate | 2019 |
| DBP Gruppen AS | Professional & scientific | 2016 |
| DC Nordic AS | Information & communication | 2025 |
| DC Norge AS | Professional & scientific | 2004 |
| DDW Offshore AS | Transport & logistics | 2007 |
| De Lage Landen International B.V. Nuf | Financial services | 2025 |
| Decon-X International AS | Health & social care | 2006 |
| Dell Computer A/S | Wholesale & retail | 1999 |
| Delta Wines Norway AS | Wholesale & retail | 2023 |
| Delticom AG | Wholesale & retail | 2005 |
| Den Norske Amerikalinje AS | Transport & logistics | 2004 |
| Dengin Design AS | Professional & scientific | 2004 |
| Desmi Norge AS | Wholesale & retail | 2002 |
| Despina AS | Real estate | 2018 |
| Destilleriveien 11 AS | Real estate | 2018 |
| Det Norske Kaffehus AS | Wholesale & retail | 2014 |
| Dibkunnskap AS | Information & communication | 1995 |
| Dico AS | Wholesale & retail | 2003 |
| Digiflow AS | Information & communication | 2009 |
| Digital Forest AS | Information & communication | 2020 |
| Digital Idea AS | Information & communication | 2019 |
| Digitale Medier 1881 AS | Information & communication | 2010 |
| Dilla Norge AS | Wholesale & retail | 2025 |
| Dinbyggpartner AS | Professional & scientific | 2016 |
| Disruptive Technologies ASA | Wholesale & retail | 2013 |
| Disruptive Technologies Research AS | Information & communication | 2014 |
| Distillium AS | Wholesale & retail | 2011 |
| Distillium Group AS | Wholesale & retail | 2019 |
| Divini AS | Wholesale & retail | 2008 |
| Dolphin Eiendom AS | Real estate | 2000 |
| Dom Saveleff AS | | 2026 |
| Domaine Wines AS | Wholesale & retail | 2006 |
| DR Techn Olav Olsen AS | Professional & scientific | 1999 |
| DR. Hansteins Gate 13-17 AS | Real estate | 2016 |
| Dragos Invest AS | Financial services | 2017 |
| Drammen Klargjøring Drift AS | Real estate | 2026 |
| Drammensveien 114 AS | Real estate | 2020 |
| Drift Snph AS | Hospitality | 2015 |
| Drivn AS | Education | 2022 |
| Drivn Billingstad AS | Education | 2025 |
| Drivn Jessheim AS | Education | 2024 |
| Drivn Kjeller AS | Education | 2022 |
| Drivn Lillestrøm AS | Education | 2025 |
| Drivn Nannestad AS | Education | 2024 |
| Drivn Nesbru AS | Education | 2025 |
| Drivn Skedsmo AS | Education | 2025 |
| Drivn Stabekk AS | Education | 2024 |
| Drivn Tech AS | Information & communication | 2022 |
| Drivn Trafikkskole AS | Education | 2025 |
| Drivn Ullern AS | Education | 2024 |
| Drop in Frisør Lysaker AS | Other services | 2020 |
| Drømmedama AS | Information & communication | 2026 |
| Dvegi AS | Professional & scientific | 2006 |
| Dyna Shipping AS | Transport & logistics | 2002 |
| E & Al Solutions AS | Construction | 2023 |
| E. Sæther AS | Wholesale & retail | 2016 |
| E.Stenberg Holding AS | | 2022 |
| Eas Solid Rock AS | Wholesale & retail | 2007 |
| Ecoflow PLC | Wholesale & retail | 2002 |
| Edda Grafisk AS | Professional & scientific | 2021 |
| Edda Presse AS | Professional & scientific | 2017 |
| Edda Trykk AS | Manufacturing | 2021 |
| Edda Wind AS | Construction | 2019 |
| Edda Wind I AS | Construction | 2019 |
| Edda Wind III AS | Construction | 2019 |
| Edda Wind Investment AS | Construction | 2021 |
| Edda Wind Management AS | Construction | 2021 |
| Edda Wind Vii AS | Construction | 2021 |
| Eden Capital AS | | 2025 |
| Edr & Medeso AS | Information & communication | 2011 |
| Efe Consulting AS | Professional & scientific | 2024 |
| Efjordveien 1204 AS | Real estate | 2023 |
| Efla AS | Professional & scientific | 2008 |
| Eidsbugarden Drift AS | Hospitality | 2021 |
| Eiendom Farris Bad AS | Real estate | 2001 |
| Eiendomsutvikling 1 AS | Real estate | 2004 |
| Eiffel Eiendom AS | Real estate | 1992 |
| Eiffel Feste AS | Real estate | 2011 |
| Eiksmarka Bolig AS | Real estate | 2012 |
| Eiksmarka Næringsbygg AS | Real estate | 1986 |
| Einar a Engelstad AS | Wholesale & retail | 2002 |
| Eir Pharma AS | Wholesale & retail | 2013 |
| Eiv Studio AS | Wholesale & retail | 2022 |
| Eldorado Oslo AS | Administrative & support | 2011 |
| Electra Trade AS | Wholesale & retail | 2021 |
| Elektromedia AS | Information & communication | 2004 |
| Elfidi Investments AS | | 2024 |
| Elnes Utbygging AS | Real estate | 2008 |
| Elnett Gruppen AS | Wholesale & retail | 2005 |
| Elsemag AS | Financial services | 2005 |
| Emx Norwegian Services AS | Professional & scientific | 2018 |
| En Enkel Sjel AS | | 2021 |
| Enable Consulting AS | Professional & scientific | 2010 |
| Ender Skog AS | Real estate | 1997 |
| Endúr ASA | Construction | 2007 |
| Endúr Bidco II AS | Construction | 2020 |
| Endúr Eiendom AS | Real estate | 2013 |
| Energi Control AS | Administrative & support | 2005 |
| Energima Analyse AS | Professional & scientific | 2005 |