| Cosmetic Consult AS | Health & social care | 2024 |
| Cotton Candy AS | Wholesale & retail | 2022 |
| Creatix AS | Wholesale & retail | 2013 |
| Creperi to Be AS | Hospitality | 2021 |
| Crescera Nova AS | Professional & scientific | 2025 |
| Crew Software AS | Information & communication | 2026 |
| CVB AS | Wholesale & retail | 2023 |
| CW Auto AS | Wholesale & retail | 2025 |
| Cwright Holding AS | | 2026 |
| Cyberworks AS | Professional & scientific | 2012 |
| Cyprian Holding AS | Hospitality | 2005 |
| D&K Nails AS | Hospitality | 2023 |
| D&S Bygg AS | Construction | 2022 |
| D-Ide AS | Professional & scientific | 2008 |
| D-Tech Da | Professional & scientific | 2008 |
| Dag & Bjørn Maskinutleie Da | Administrative & support | 2000 |
| Dahl / Finne Auto AS | Wholesale & retail | 2016 |
| Dahl / Finne Holding AS | Real estate | 2017 |
| Daimlers AS | Hospitality | 1992 |
| Damascino Portvakta AS | Hospitality | 2020 |
| Dapt Invest AS | | 2020 |
| Dateco Norge Da | Information & communication | 2004 |
| Dattebayo Heistad AS | Hospitality | 2024 |
| Dattebayo Porsgrunn AS | Hospitality | 2019 |
| De Holding AS | Financial services | 2014 |
| Deconterra AS | Wholesale & retail | 2015 |
| Deila AS | Education | 2021 |
| Deila Design AS | Wholesale & retail | 2023 |
| Dekkspesialisten AS | Wholesale & retail | 1986 |
| Delivery AS | Transport & logistics | 2017 |
| Delta Support AS | Professional & scientific | 1993 |
| Deltabryggen AS | Construction | 2020 |
| Den Stolte Pølsemaker AS | Manufacturing | 2016 |
| Dento AS | Health & social care | 1987 |
| Derivat Invest AS | Financial services | 1993 |
| Det Lille Brug AS | Financial services | 2005 |
| Dew AS | Other services | 2025 |
| Dhital Invest AS | | 2021 |
| Din Mobile Optiker AS | Health & social care | 2012 |
| Din Rekrutterer AS | Administrative & support | 2014 |
| Din Revisor Telemark AS | Professional & scientific | 2002 |
| Dinh Holding AS | Professional & scientific | 2022 |
| Dionisi Holding AS | | 2026 |
| Diplomaten AS | Wholesale & retail | 2003 |
| Dir. Smidths Gate 6 AS | Real estate | 2021 |
| Ditlefsen Holding & Invest AS | | 2026 |
| DK Beauty AS | Other services | 2025 |
| DMH Holding AS | | 2024 |
| DMZ Data AS | Information & communication | 2001 |
| DNV Imatis AS | Information & communication | 1991 |
| Dokkvegen 11 AS | Real estate | 2020 |
| Dokkvegen 8 & 10 AS | Real estate | 1997 |
| Dokkvegen 9 AS | Real estate | 2020 |
| Dorri Holding AS | | 2025 |
| Dotno Domains Trustee Services Da | Information & communication | 2018 |
| Dotno Trustee Domains Da | Administrative & support | 2018 |
| Dotno Trustee Services Da | Administrative & support | 2016 |
| Double M Renhold AS | Administrative & support | 2026 |
| Double-Booked Invest AS | Information & communication | 2019 |
| Down Town Hagesenter AS | Wholesale & retail | 2006 |
| Down Town Klokker Og Smykker AS | Wholesale & retail | 2013 |
| DP Group AS | | 2026 |
| DR. Chet Da | Arts & recreation | 2005 |
| DR. Esben Storvand AS | Health & social care | 2006 |
| Drangedalsvegen 100 AS | Real estate | 2014 |
| Drangedalsvegen 106 AS | Real estate | 2005 |
| Drangedalsvegen Eiendom AS | Real estate | 2013 |
| Dream AS | Real estate | 2005 |
| Dreams Beauty AS | Other services | 2022 |
| Dreams Construction AS | Administrative & support | 2024 |
| Drift H91 AS | Administrative & support | 2018 |
| Driftsfokus AS | Professional & scientific | 2026 |
| DRV 102 AS | Real estate | 2023 |
| DSH Holding AS | Administrative & support | 2025 |
| DT Bilpleie AS | Other services | 2021 |
| Due Ragazzi AS | Hospitality | 2006 |
| Dunder Mifflin Invest AS | | 2026 |
| Duverden AS | Arts & recreation | 2007 |
| Dva Eiendom AS | | 2012 |
| Dynasty Holding AS | | 2026 |
| Data Kompetanse DA | Information & communication | 1988 |
| Dønn Holding AS | Real estate | 2019 |
| Dønn Hærlig Eiendom AS | Real estate | 2019 |
| Døvikveien 22 AS | Real estate | 2024 |
| E-Lønnebakke AS | Professional & scientific | 2012 |
| E18 Truckcenter Sales AS | Wholesale & retail | 2020 |
| E2M Holding | | 2020 |
| Easyjetski AS | Administrative & support | 2022 |
| Ebitech AS | Manufacturing | 2020 |
| Echo Eiendom AS | Real estate | 2015 |
| Eckholdt AS | Construction | 1988 |
| Ed Records Da | Arts & recreation | 2020 |
| Eddie AS | Construction | 2018 |
| Edge Branding AS | Professional & scientific | 1999 |
| Edison Consulting AS | Administrative & support | 2020 |
| Edquist Invest AS | Real estate | 2001 |
| Edsc Holding AS | | 2005 |
| Edstrøm Invest AS | | 2021 |
| Edyta-Vask Rent Og Pent AS | | 2026 |
| Ef Auto AS | Wholesale & retail | 2026 |