| Dag Bondeheim AS | Hospitality | 1996 |
| Dag Og Tid AS | Information & communication | 1964 |
| Dag Stoltenberg AS | Information & communication | 2019 |
| Dag Torsæter AS | Wholesale & retail | 2014 |
| Dag-Are Halland Invest AS | Professional & scientific | 2021 |
| Dag-Inge Aas AS | Information & communication | 2017 |
| Dag.S AS | Financial services | 2005 |
| Dagab AS | Financial services | 2005 |
| Dagaliveien 34 Ans | Real estate | 1991 |
| Dagaln AS | Real estate | 2023 |
| Dagdas AS | Information & communication | 2026 |
| Dagens Holding AS | | 2018 |
| Dagens Medisin AS | Information & communication | 1998 |
| Dagens Næringsliv AS | Information & communication | 1991 |
| Dagens Perspektiv AS | Information & communication | 2017 |
| Dager På Gården AS | Hospitality | 2025 |
| Dagfs AS | Financial services | 2018 |
| Dagger AS | Professional & scientific | 2025 |
| Daglig Brød AS | Manufacturing | 2025 |
| Daglig Glede AS | Information & communication | 2020 |
| Daglig Handel AS | Wholesale & retail | 2008 |
| Dagligstuen AS | Hospitality | 2005 |
| Dagligvare Eiendom AS | Real estate | 2012 |
| Dagligvare Eiendom II AS | Real estate | 2024 |
| Dagligvare Holding AS | Financial services | 2018 |
| Dagligvare Midco AS | Real estate | 2016 |
| Dagligvare Oslo AS | Real estate | 2005 |
| Dagligvare Oslo Hjemmel I AS | Real estate | 2018 |
| Dagligvare Oslo Hjemmel II AS | Real estate | 2018 |
| Dagligvare Oslo Hjemmel III AS | Real estate | 2018 |
| Dagligvare Oslo KS | Real estate | 2005 |
| Dagligvarebygg Sandnessjøen AS | Real estate | 2013 |
| Dagligvarehandelens Miljøforum AS | Professional & scientific | 2007 |
| Dagloth AS | Real estate | 1986 |
| Dagmamma AS | Administrative & support | 2017 |
| Dagne Group AS | Wholesale & retail | 2026 |
| Dagrun Invest AS | Real estate | 2015 |
| Dagsavisen AS | Information & communication | 1998 |
| Dagsgard Invest AS | | 2020 |
| Dagskjøp AS | Wholesale & retail | 2018 |
| Dagslott Stabell Holding AS | | 2020 |
| Dagslys AS | Administrative & support | 1997 |
| Dagsvikelva Kraft AS | Energy | 2012 |
| Dagu Invest AS | | 2021 |
| Dahay Holding AS | | 2025 |
| Dahl & Co Trading Ans | Wholesale & retail | 1981 |
| Dahl & Dyrud Bygg Og Vedlikehold Da | Construction | 2004 |
| Dahl Exploration AS | Professional & scientific | 2018 |
| Dahl Gading AS | | 2026 |
| Dahl Holding AS | Real estate | 2007 |
| Dahl Invest AS | Professional & scientific | 1998 |
| Dahl Kapital AS | | 2020 |
| Dahl Og Aarnes Regnskap AS | Professional & scientific | 2007 |
| Dahl Og Strand Invest AS | Professional & scientific | 2009 |
| Dahl Services AS | Professional & scientific | 2024 |
| Dahl Smaadahl Holding AS | | 2025 |
| Dahlak AS | Transport & logistics | 2024 |
| Dahlba AS | Real estate | 2005 |
| Dahlba Design AS | Professional & scientific | 2019 |
| Dahlba Eiendom AS | Real estate | 2019 |
| Dahlberg Årstad AS | Administrative & support | 2013 |
| Dahlberg Årstad Eiendom AS | Real estate | 2022 |
| Dahlbo Holding AS | Financial services | 1998 |
| Dahle Development AS | Information & communication | 2023 |
| Dahlee Eiendom AS | Real estate | 2021 |
| Dahlfredriksen Da | Wholesale & retail | 2025 |
| Dahlia Management AS | Real estate | 2022 |
| Dahlmar AS | | 2025 |
| Dahlrail AS | Wholesale & retail | 2012 |
| Dahlrail Ontracks AS | Real estate | 2025 |
| Dahlseng Consulting AS | Professional & scientific | 2026 |
| Dahlstrøm AS | Wholesale & retail | 1997 |
| Dahlstø AS | | 2021 |
| Dahlum Invest AS | Real estate | 2005 |
| Dahlén Holding AS | | 2026 |
| Dahm Tryggestad AS | | 2018 |
| Dahr Invest AS | | 2026 |
| Dahr Og Nygaard Hurra AS | Information & communication | 1996 |
| Dai Dung Scandinavia AS | Wholesale & retail | 2019 |
| Daia AS | Information & communication | 2025 |
| Daia Invest AS | Real estate | 1966 |
| Daidalos AS | | 2025 |
| Daidda AS | Manufacturing | 2023 |
| Daikai Bjørvika AS | Health & social care | 2020 |
| Daikai Europe AS | Health & social care | 2008 |
| Daikai Norway AS | Health & social care | 2008 |
| Daikatana S.R.O. Nuf | Administrative & support | 2010 |
| Daikin Airconditioning Norway AS | Wholesale & retail | 1985 |
| Daiko AS | Information & communication | 2021 |
| Daily AS | Wholesale & retail | 2024 |
| Dailyoff AS | Wholesale & retail | 2023 |
| Daimyo AS | Real estate | 2003 |
| Daimyo Eiendom AS | Real estate | 2013 |
| Daimyo Eiendomsdrift AS | Real estate | 2014 |
| Daimyo Ekstra 100 AS | Real estate | 2023 |
| Daimyo Ekstra 102 AS | | 2024 |
| Daimyo Ekstra 108 AS | | 2024 |
| Daimyo Ekstra 110 AS | | 2024 |
| Daimyo Ekstra 111 AS | | 2024 |
| Daimyo Ekstra 112 AS | | 2024 |