| Draco Eiendom AS | Real estate | 2012 |
| Draco Investering Og Plassering AS | Information & communication | 2003 |
| Dragland Securities AS | | 2025 |
| Dragonflame AS | | 2023 |
| Dragset Torp Holding AS | | 2025 |
| Dragvoll Alle AS | Real estate | 2021 |
| Draja AS | Professional & scientific | 2021 |
| Dramit AS | Information & communication | 2017 |
| Drangs AS | | 2023 |
| Draug AS | Other services | 2014 |
| Draugen-Njord Eiendom Da | Real estate | 2024 |
| Draupnir Holding AS | Financial services | 2018 |
| Draupnir Invest AS | Professional & scientific | 2019 |
| Dream Nest AS | Professional & scientific | 2019 |
| Drege Holding AS | | 2020 |
| Dreie Vinden AS | | 2019 |
| Dress Design AS | Wholesale & retail | 2021 |
| Drevland Consulting AS | Professional & scientific | 2007 |
| DRH Travels AS | Administrative & support | 2023 |
| Drift Oss AS | Administrative & support | 2020 |
| Driftsfinans AS | Real estate | 2018 |
| Driftskompaniet AS | Administrative & support | 2026 |
| Driiv Holding AS | | 2021 |
| Driiv Works AS | Wholesale & retail | 2025 |
| Drimbyte AS | Information & communication | 2026 |
| Driv Mobil AS | Information & communication | 2026 |
| Driva Kraftverk Da | Energy | 1966 |
| Driveup Trafikkvideo Ans | | 1994 |
| Drivstua Gartneri AS | Agriculture & fishing | 2003 |
| DRM Invest AS | Real estate | 2006 |
| Drojst Holding AS | Financial services | 2016 |
| Dromedar Kaffebar AS | Hospitality | 1997 |
| Dronningen 58 AS | Real estate | 2020 |
| Dronningen Restaurant AS | Hospitality | 2026 |
| Dronningens Gate 13 AS | Real estate | 2023 |
| Dronningens Gate 2 AS | Real estate | 2019 |
| Dronningens Gate 20-24 AS | Real estate | 2021 |
| Dronningens Gate 32 AS | Real estate | 2017 |
| Dronningens Gate 37 AS | Real estate | 2023 |
| Dronningens Gate 40 AS | Real estate | 2008 |
| Dronningens Gate 48 AS | Real estate | 2003 |
| Dronningens GT 11 AS | Real estate | 2005 |
| Dronningens GT 18 AS | Real estate | 1980 |
| Dronningens Tenner AS | Health & social care | 2008 |
| Dronningensgt 30 AS | Real estate | 1972 |
| Droptho AS | Health & social care | 2024 |
| Druber AS | Professional & scientific | 2024 |
| Dråben Montasje AS | Real estate | 2021 |
| Dråpen Solsiden AS | Hospitality | 2006 |
| Drømmehagen Hudpleie AS | Other services | 2010 |
| DRØMMEKJØKKENET Filial av utenlandsk foretak NUF | Wholesale & retail | 1995 |
| Drømmelund AS | Real estate | 2016 |
| DS Eiendom Trøndelag AS | Real estate | 2021 |
| Dsign Music Rights AS | Information & communication | 2016 |
| DSK Eiendom AS | Real estate | 2017 |
| Dsmg AS | Information & communication | 2020 |
| Dsolve AS | Professional & scientific | 2022 |
| DT Snekkerservice AS | Construction | 2025 |
| Dtablet AS | Manufacturing | 2024 |
| Dtecto AS | Professional & scientific | 2016 |
| DTK AS | Financial services | 2005 |
| Dtyp Invest AS | | 2025 |
| Ducky AS | Professional & scientific | 2014 |
| Ducky Impact Fund AS | | 2018 |
| Due Børve AS | | 2024 |
| Dugan Invest AS | | 2026 |
| Dugnadsprodukter AS | Wholesale & retail | 2018 |
| Dulcis AS | Financial services | 2012 |
| Duodu AS | Professional & scientific | 2006 |
| Durabo AS | Real estate | 2010 |
| Duraj Invest AS | Health & social care | 2005 |
| Duras AS | Arts & recreation | 2018 |
| Duvnjak Holding AS | Financial services | 2018 |
| Dvergtroll AS | Hospitality | 2016 |
| DWK AS | | 2024 |
| Dybvik Invest AS | Real estate | 2018 |
| Dykkersport Trondheim AS | Wholesale & retail | 1984 |
| Dyme Invest AS | Information & communication | 2020 |
| Dymhm Innovation & Engineering Services AS | Professional & scientific | 2024 |
| Dynamica AS | Information & communication | 1993 |
| Dynamisk Helse AS | Information & communication | 2011 |
| Dyrborg AS | | 2005 |
| Dyrborg Panorama AS | Real estate | 2006 |
| Dyrdahl Eiendom AS | Real estate | 2013 |
| Dyre Halses Gate 13 a AS | Other services | 2010 |
| Dyre Halses Gate 20 AS | Real estate | 1992 |
| Dyre Holding AS | Hospitality | 2014 |
| Dyrendahl Invest AS | | 2020 |
| Dyrkoren Maritime Advisory AS | Professional & scientific | 2015 |
| Dåra Invest AS | Construction | 2012 |
| Dønskiveien 6 Utvikling AS | | 2025 |
| Dørteknikk Midt-Norge AS | Wholesale & retail | 2025 |
| Døråpner Kapitalinvest AS | Real estate | 2021 |
| Døsen Holding AS | Financial services | 2005 |
| Døvre Search & Selection AS | Administrative & support | 1997 |
| E C Dahls Eiendom AS | Real estate | 1993 |
| E C Dahls Eiendom Drift AS | Real estate | 1997 |
| E Fjeldseth Invest AS | Construction | 1975 |
| E Hegstad Holding AS | Professional & scientific | 2023 |
| E Rendall Holding AS | | 2021 |