| Dalum AS | Financial services | 2005 |
| Dalux Norway AS | Information & communication | 2017 |
| Dalvang Design AS | Financial services | 2018 |
| Damascino Food AS | Hospitality | 2018 |
| Damasg AS | | 2026 |
| Damaskus AS | Hospitality | 2025 |
| Damasol AS | Professional & scientific | 1993 |
| Damedi AS | | 2025 |
| Damedoktor AS | Health & social care | 2016 |
| Damefallet AS | | 2023 |
| Damgård AS | Professional & scientific | 2008 |
| Damgård Invest AS | Professional & scientific | 2021 |
| Damgårdslunden 15 AS | Real estate | 2019 |
| Damhaug Drift AS | Health & social care | 2026 |
| Damhaug Holding AS | Financial services | 2016 |
| Damhaug Invest AS | Financial services | 2006 |
| Damian Bygg AS | Construction | 2019 |
| Damla Sasmaz Beauty AS | Other services | 2022 |
| Dammen 2 AS | Professional & scientific | 2026 |
| Dammen Geo-Services AS | Financial services | 2015 |
| Dammen Holding AS | | 2024 |
| Dammensvika Eiendomsutvikling AS | Real estate | 2018 |
| Damms Antikvariat AS | Wholesale & retail | 1964 |
| Damnit Consulting AS | Information & communication | 2020 |
| Damonlab Limited | Manufacturing | 2019 |
| Dampestolen AS | Real estate | 2005 |
| Dampestolen Eid Eiendom AS | Real estate | 2020 |
| Damplass Blomster AS | Wholesale & retail | 2006 |
| Damplass Tannlege AS | Health & social care | 2026 |
| Damplass Tannlegekontor AS | Health & social care | 2026 |
| Damplassen 2 AS | Real estate | 2015 |
| Damplassen AS | Health & social care | 2015 |
| Damplassen Barnehage SA | Education | 1989 |
| Dampskibsaktieselskabet Theologos AS | Professional & scientific | 1917 |
| Damsgård Eiendom AS | Wholesale & retail | 2005 |
| Damsgård Holding AS | Manufacturing | 2011 |
| Damsgård Industrier AS | Manufacturing | 2023 |
| Damsgårdsveien 106 AS | Real estate | 2006 |
| Damstedet Eiendom AS | Real estate | 2009 |
| Damstredet AS | Administrative & support | 2023 |
| Damu AS | | 2024 |
| Dan Blikk AS | Construction | 1994 |
| Dan Eggen Holding AS | | 2021 |
| Dan Emil Framnæs AS | Real estate | 2014 |
| Dan M Norager AS | Health & social care | 2021 |
| Dan Nguyen Lege AS | Health & social care | 2020 |
| Dan-Flex Construction Aps | Administrative & support | 2002 |
| Dan-Stock Næringslokaler AS | Real estate | 2014 |
| Dana B. Stene Psykologspesialist AS | Health & social care | 2023 |
| Dana Bakeri AS | Manufacturing | 2020 |
| Danaly AS | Administrative & support | 2019 |
| Danbit AS Nuf | Wholesale & retail | 1997 |
| Dance Events AS | Education | 2020 |
| Dance.Id AS | Information & communication | 2026 |
| Danceminute AS | Education | 2025 |
| Dancemore AS | Education | 2022 |
| Dancespace AS | Arts & recreation | 2013 |
| Dancify AS | Education | 2018 |
| Dancing Healer AS | Other services | 2026 |
| Dancke Invest AS | | 2026 |
| Dandan.No AS | Wholesale & retail | 2026 |
| Dandara AS | Construction | 2019 |
| Dandara Invest AS | Construction | 2021 |
| Dandela AS | Health & social care | 2025 |
| Dandelions AS | Professional & scientific | 2021 |
| Danebu Utvikling AS | Real estate | 2013 |
| Daneka Bygg AS | Construction | 2025 |
| Daneshmand Eiendom AS | Real estate | 2007 |
| Danex AS | Real estate | 2005 |
| Dangerous Club AS | Administrative & support | 2020 |
| Dangs Morningstar AS | Other services | 2024 |
| Danica AS | Hospitality | 2015 |
| Danica Film AS | Information & communication | 2002 |
| Danico Investment AS | | 2025 |
| Daniel & Ulrik AS | Hospitality | 2023 |
| Daniel Bøe Jacobsen Invest AS | | 2022 |
| Daniel Engen Sandén Invest AS | | 2019 |
| Daniel Gangsø AS | Professional & scientific | 2018 |
| Daniel Haugstvedt AS | Real estate | 2021 |
| Daniel Hoftun Holding AS | | 2020 |
| Daniel Jackson AS | Information & communication | 2017 |
| Daniel Løberg | Arts & recreation | 2013 |
| Daniel Massie AS | Real estate | 2021 |
| Daniel Mathiesen AS | Information & communication | 2022 |
| Daniel Nails AS | Other services | 2022 |
| Daniel Rødskog Holding AS | | 2024 |
| Daniel Strengelsrud Holding AS | Financial services | 2016 |
| Daniel Zeller AS | Information & communication | 2018 |
| Danielsen & Partnere AS | Financial services | 2016 |
| Daninvest AS | Real estate | 1997 |
| Danish Crown Norway AS | Wholesale & retail | 2007 |
| Danjalsson AS | | 2023 |
| Danlog II AS | | 2018 |
| Danm Holding AS | | 2019 |
| Danmarc Invest AS | Professional & scientific | 2004 |
| Danmarks Gate 29 Eiendom AS | Real estate | 2022 |
| Danmon Group Norway AS | Wholesale & retail | 1988 |
| Danmusikk.No | Wholesale & retail | 2013 |
| Danneborg Invest AS | Real estate | 2006 |
| Dannevig & Co AS | | 2024 |