| Donnattiva AS | Professional & scientific | 2014 |
| Dorsia Oslo AS | Hospitality | 2017 |
| Dotnet Invest AS | Real estate | 2012 |
| Dots AS | Information & communication | 2002 |
| Dove Eiendom AS | Real estate | 2006 |
| Dove Holding AS | Construction | 2006 |
| Dovland Eiendom AS | Real estate | 2012 |
| Dovland Holding AS | Hospitality | 2005 |
| Dovland Invest AS | Hospitality | 2004 |
| Doxa Sound AS | Wholesale & retail | 2013 |
| DP Frakt AS | Transport & logistics | 2017 |
| DP Sør AS | Hospitality | 2020 |
| DR Munthe AS | Health & social care | 2026 |
| DR. Digi AS | Health & social care | 2023 |
| DR. Nordstrøm AS | Health & social care | 2018 |
| DR. Zakout Hudklinikk AS | Health & social care | 2012 |
| Drabant Holding AS | Real estate | 2005 |
| Drage Invest AS | Real estate | 2005 |
| Drangsvann AS | Real estate | 1997 |
| Drangsvann Barnehage AS | Education | 2022 |
| Drangsvann Næring AS | Real estate | 2022 |
| Dreamlabs AS | Real estate | 2025 |
| Dreggveien Invest AS | Real estate | 2019 |
| Drevelin Ortopedi Sør AS | Manufacturing | 2018 |
| DRG AS | Real estate | 2019 |
| DRG56 AS | Professional & scientific | 2022 |
| DRG60 AS | Real estate | 2023 |
| Drift Og Transport AS | Construction | 2019 |
| Drift Og Vedlikehold Sør AS | Administrative & support | 2025 |
| Drift Sør AS | Administrative & support | 2020 |
| Drift Sør Gruppen AS | Administrative & support | 2020 |
| Drivdahl AS | Professional & scientific | 2014 |
| Drivdal Invest AS | | 2020 |
| DRL Holding AS | Administrative & support | 2017 |
| Dronningen Eiendomsutvikling AS | Real estate | 2018 |
| Dronningene Av Dronningens AS | Real estate | 2019 |
| Dronningens 24 AS | Real estate | 2013 |
| Dronningens Gate 39 AS | Real estate | 2011 |
| Dronningens Gate 46 AS | Real estate | 2025 |
| Dronningens Gate 51 AS | Real estate | 2022 |
| Dronningens Gate 59 AS | Real estate | 2024 |
| Dronningens Gate 66 AS | Real estate | 2005 |
| Dronningens Kvarter AS | Real estate | 2000 |
| Dronningens Kvarter Holding AS | Real estate | 2019 |
| Dronningens Pub & Kulturscene AS | Hospitality | 2023 |
| Dronningensgate 2 AS | Real estate | 2006 |
| Dronningensgate 24B AS | Real estate | 2023 |
| Dronningensgate 31 AS | Real estate | 2017 |
| Dronningensgate 33 AS | Real estate | 1996 |
| Dronningensgate 34 1 AS | Real estate | 2016 |
| Dronningensgate 49 AS | Real estate | 2010 |
| Dronningensgate 49 Holding AS | Real estate | 2022 |
| Dronningensgate 53 AS | Real estate | 2011 |
| Dronningensgate 55 AS | Real estate | 2011 |
| Dronningensgate 58 AS | Real estate | 2014 |
| Dronningensgate 70 AS | Real estate | 2010 |
| Dronningensgate Legesenter AS | Health & social care | 2025 |
| Dronningensgt 12/16 AS | Real estate | 1999 |
| Droptech AS | Professional & scientific | 2018 |
| Drowned Chair Pictures AS | Information & communication | 2019 |
| Drukne AS | Professional & scientific | 2026 |
| Dry Fly Holding AS | | 2019 |
| Drømmeplassen AS | Hospitality | 2007 |
| Drømmeslottet Barneparkering Ans | Health & social care | 1996 |
| DSH AS | Wholesale & retail | 2017 |
| DSR Trafikk AS | Education | 2021 |
| Dual Eiendom AS | Real estate | 2023 |
| Duben AS | Construction | 2019 |
| Ducit Consulting AS | Professional & scientific | 2020 |
| Dueheia AS | Real estate | 2022 |
| Duell Software AS | Information & communication | 2016 |
| Dugnadstid AS | Wholesale & retail | 2013 |
| Duja AS | Wholesale & retail | 2025 |
| Duka Holdning AS | | 2025 |
| Dunlop Hiflex AS | Wholesale & retail | 1918 |
| Duo Frisører AS | Other services | 2011 |
| Duo Modell Da | Professional & scientific | 1990 |
| Duonova AS | | 2025 |
| Duro Systems AS | Information & communication | 2022 |
| DV8 IT AS | Information & communication | 2014 |
| Dvboh AS | Real estate | 2024 |
| Dvergsnes B9 AS | Real estate | 2015 |
| Dvergsnes Holding Ans | Health & social care | 2003 |
| Dvergsnes Mat AS | Real estate | 2018 |
| Dvergsnes Tomteselskap AS | Real estate | 1999 |
| Dvergsnes Utvikling AS | Real estate | 2018 |
| Dvergsnestoppen AS | Real estate | 2017 |
| Dvergsnesveien 130 AS | Real estate | 2005 |
| Dvergsnesåsen AS | Real estate | 2016 |
| Dvergsnesåsen B23 AS | Real estate | 2025 |
| Dvergsnesåsen B24 AS | Real estate | 2025 |
| Dvergstjerne Holding AS | | 2024 |
| Dybesland & Lie Invest AS | Administrative & support | 2005 |
| Dybwad AS | Professional & scientific | 2023 |
| Dynamo Invest AS | Real estate | 2005 |
| Dyr Invest AS | Construction | 2021 |
| Dyregrenda AS | Financial services | 2013 |
| Dyreparken Areal AS | Real estate | 2017 |
| Dyreparken Eiendom AS | Real estate | 2006 |
| Dyreparken Overnatting AS | Hospitality | 2006 |