| Didier AS | Manufacturing | 2018 |
| Different Breed AS | Wholesale & retail | 2026 |
| Digitalspor AS | Information & communication | 2023 |
| Dimension Four AS | Information & communication | 2018 |
| Din Boligvask AS | Administrative & support | 2023 |
| Din Innholdsprodusent AS | Professional & scientific | 2024 |
| Dina C AS | Real estate | 2005 |
| Dione Eiendom AS | Real estate | 2019 |
| Direct Holding AS | Other services | 2021 |
| Disnova AS | Wholesale & retail | 2023 |
| Displaced VFX AS | | 2026 |
| Divasday Ans | Wholesale & retail | 2002 |
| DKN Consult AS | Professional & scientific | 2005 |
| DL Maskinteknikk AS | Professional & scientific | 2020 |
| DM Utleie AS | Wholesale & retail | 2010 |
| Dog Stopper AS | Professional & scientific | 2023 |
| Dokkvegen 20 AS | Real estate | 2019 |
| Dokkvegen Utvikling AS | Real estate | 2019 |
| Dolce AS | Real estate | 2005 |
| Domea AS | Real estate | 2017 |
| Donali AS | Wholesale & retail | 2022 |
| Donut Bros AS | Wholesale & retail | 2021 |
| Double a AS | Construction | 2013 |
| Douglas Bygg AS | Construction | 2019 |
| Dowlo AS | Wholesale & retail | 2023 |
| Downhere AS | | 2024 |
| DP Falkum AS | Hospitality | 2022 |
| DP Greåker AS | Hospitality | 2020 |
| DR Oddveig Myhre AS | Health & social care | 2015 |
| DR. Magnussen AS | Health & social care | 2020 |
| Dragen Eiendom AS | Real estate | 2015 |
| Drangedalsveien 102 AS | Real estate | 2019 |
| Drawoc Holding AS | | 2024 |
| Dreamy Bamboo AS | Wholesale & retail | 2024 |
| Dreier Holding AS | | 2022 |
| Drevelin Ortopedi Skien AS | Manufacturing | 1984 |
| Driblo Kapital AS | | 2020 |
| Drivstoffteknikk AS | Manufacturing | 2014 |
| Droptag AS | Manufacturing | 2024 |
| DRS Websolutions Ans | Information & communication | 2024 |
| DSN Eiendomsinvest AS | Real estate | 2019 |
| DSN Holding AS | Wholesale & retail | 2019 |
| Duestien 4 AS | Real estate | 2016 |
| Duestien 9 AS | Real estate | 2016 |
| Duestien Eiendom AS | Real estate | 2000 |
| Duestien Kolonial AS | Wholesale & retail | 2020 |
| Duval Fysioterapi Da | Health & social care | 2004 |
| Duval Fysioterapi Eiendom AS | Real estate | 1999 |
| Dvø AS | Professional & scientific | 2013 |
| Dynam AS | Real estate | 1989 |
| Dyrendahl AS | | 2025 |
| Dyring AS | | 1984 |
| Dødsbo Og Edelmetall Omsetning AS | Wholesale & retail | 2026 |
| Døli Holding AS | | 2018 |
| Dør & Vindu Skien AS | Wholesale & retail | 2026 |
| Dørautomatikk AS | Construction | 2020 |
| E-Bolig AS | Hospitality | 2026 |
| E-No AS | Wholesale & retail | 2021 |
| E-Triex AS | Wholesale & retail | 2021 |
| E.M.G Holding AS | Manufacturing | 2024 |
| E9 Bolig AS | Information & communication | 2026 |
| Eaex AS | Real estate | 2019 |
| Easy Roller AS | Manufacturing | 1992 |
| Ebersten Holding AS | Financial services | 2005 |
| Echo Invest AS | | 2024 |
| Edda Eiendom Ans | Real estate | 1994 |
| Edda Solutions AS | Administrative & support | 2013 |
| Eek Auksjonsforretning AS | Wholesale & retail | 2006 |
| Ef Click System AS | Construction | 2018 |
| Eg Finans AS | Real estate | 2005 |
| Ehatlem AS | Information & communication | 2022 |
| Eib Consulting AS | Information & communication | 2020 |
| Eidselva AS | Real estate | 2021 |
| Eie & Leie AS | Real estate | 2014 |
| Eiendom A102 AS | Real estate | 2026 |
| Eiendoms Companiet Da | Real estate | 2002 |
| Eiendomsdrift 24 AS | Real estate | 2018 |
| Eiendomsinvest Da | Wholesale & retail | 2003 |
| Eiendomsselskapet Holbergsg 4 AS | Real estate | 1994 |
| Eierskifte AS | Information & communication | 2021 |
| Eik-Nilsen Holding AS | | 2020 |
| Eilert AS | Real estate | 2023 |
| Eilert Sundts Gate 83 SA | Real estate | 2021 |
| Einar Sandborg & Co Ans | Wholesale & retail | 1984 |
| Einaren Barnehage SA | Education | 1989 |
| Einars Holding AS | Financial services | 2005 |
| Einungbrekke Holding AS | | 2021 |
| Eipa AS | Health & social care | 2019 |
| Eir Invest AS | Financial services | 2017 |
| Eirik Bjørbæk AS | Arts & recreation | 2023 |
| Eitran Holding AS | | 2023 |
| Ejk Holding AS | | 2005 |
| Ek Import AS | Wholesale & retail | 2018 |
| Ekinok AS | Professional & scientific | 2018 |
| Ekke Holding AS | Professional & scientific | 2013 |
| Ekornrød AS | Real estate | 2021 |
| Ekornrød Consulting AS | Professional & scientific | 2019 |
| Ekre Snekkerservice AS | Construction | 2013 |
| Ekspress Transport AS | Transport & logistics | 2017 |
| El Mundo Trading Nuf | Wholesale & retail | 2020 |