| Bnbc Invest AS | Financial services | 2013 |
| Bockelie Holding AS | | 2005 |
| Booze of Norway AS | Manufacturing | 2022 |
| Borgen Kabellag SA | Information & communication | 2011 |
| Boutique Classic AS | Wholesale & retail | 1996 |
| Braathen Kapital AS | | 2021 |
| Bragernes Torg 11 AS | Real estate | 2007 |
| Braindrops AS | Financial services | 2010 |
| Breivika Invest AS | Real estate | 2024 |
| Brief AS | Real estate | 2006 |
| Brutus AS | Professional & scientific | 2008 |
| Brødr. Michelsen Holding AS | Professional & scientific | 2005 |
| BS 50 Bilstad AS | Real estate | 1995 |
| BSH 252 Holding AS | | 2023 |
| Burénius AS | Professional & scientific | 2019 |
| Bustad Beitostølen AS | Real estate | 2019 |
| Bygg-Automasjon AS | Wholesale & retail | 1975 |
| Byggefond AS | Financial services | 1964 |
| Bygglad AS | Construction | 2026 |
| Byggmesterne AS | Construction | 2014 |
| Bærum Og Oslo Taxi AS | Transport & logistics | 2023 |
| Bærum Plast AS | Manufacturing | 2016 |
| Børs Invest AS | Professional & scientific | 2020 |
| Børs Jr.Invest AS | Professional & scientific | 2022 |
| C Berg Holding AS | | 2021 |
| Calypto Tech AS | Professional & scientific | 2025 |
| Camilla. Frisør Salong&Academy AS | Other services | 2021 |
| Canito Ltd Nuf | Financial services | 2007 |
| Capricorn Eiendom AS | Real estate | 2021 |
| Captain AS | Real estate | 2019 |
| Car Service AS | Other services | 2010 |
| Casa Hava AS | Hospitality | 2026 |
| Cava Eiendom Da | Real estate | 2014 |
| Chera AS | Real estate | 2006 |
| Chevere AS | Professional & scientific | 2020 |
| Christmas Consulting AS | Administrative & support | 1980 |
| Cis Partner AS | Information & communication | 2018 |
| City Consulting AS | Professional & scientific | 1989 |
| Claremont AS | Professional & scientific | 1996 |
| Coeli Asset Management AB | Administrative & support | 2019 |
| Complan Network AS | Professional & scientific | 1986 |
| Composit Holding AS | Manufacturing | 2015 |
| Contento AS | Professional & scientific | 2016 |
| Core Security AS | Administrative & support | 2013 |
| Corinne Alice AS | Professional & scientific | 2015 |
| CR Holding AS | Professional & scientific | 1997 |
| Crst Advisory AS | Professional & scientific | 2024 |
| Cs-Holding AS | Real estate | 2005 |
| Daleng AS | | 2026 |
| Dannejugen Holding AS | Professional & scientific | 2021 |
| Darre-Nilsen Invest AS | | 2022 |
| Dask Invest AS | Real estate | 2021 |
| Depotgata 12 AS | Real estate | 1975 |
| Depotgata 18 AS | Real estate | 2006 |
| Design AS | Professional & scientific | 2011 |
| Det Gyldne Triangel AS | Real estate | 2017 |
| Detour AS | Professional & scientific | 2001 |
| Dfarm AS | | 2019 |
| Diamond Nanomachines AS | Manufacturing | 1999 |
| Digman AS | Professional & scientific | 2014 |
| Din Bilconcierge AS | Transport & logistics | 2019 |
| Din Cafe & Grill Ans | Wholesale & retail | 2002 |
| Dnino AS | Real estate | 2005 |
| Dry Rock Energy AS | | 2012 |
| Dyrekiropraktoren AS | Professional & scientific | 2021 |
| E & G Delica AS | Wholesale & retail | 2006 |
| E. Opstad Holding AS | Real estate | 2005 |
| Edir Perfekt Bygg AS | Construction | 2013 |
| Egersund Fiskeri Investering AS | Manufacturing | 1999 |
| Eians AS | | 1994 |
| Eidsten Bygg AS | Construction | 2012 |
| Einar Resource Group AS | | 2000 |
| Eivald Holding AS | | 2019 |
| Ekuben AS | Education | 2008 |
| Elektro - Partner AS | Construction | 2013 |
| Elektro-Term AS | Construction | 1997 |
| Elektromisjon AS | Construction | 2024 |
| Elementsalg AS | Wholesale & retail | 2016 |
| Elin Øyehaug AS | Real estate | 2013 |
| Elinvest AS | | 2005 |
| Ella Og Farfar AS | | 2016 |
| Eltera Gruppen AS | Construction | 2021 |
| Eltera Gruppen Norge AS | Construction | 2021 |
| Elvebredd AS | Information & communication | 2025 |
| Elvebredd Drift AS | Information & communication | 2025 |
| Em Technologies AS | Information & communication | 2025 |
| Emporio Brasil AS | Wholesale & retail | 2022 |
| Engdalheim Eiendom AS | Real estate | 2019 |
| Engefjell AS | | 2021 |
| Enviro Bil Nesbru AS | Wholesale & retail | 2008 |
| Eplehagen AS | Financial services | 2006 |
| Eplestrand AS | Administrative & support | 2026 |
| Eppitech AS | Information & communication | 2009 |
| Equilibrium AS | Real estate | 2014 |
| Eriksen Electric Power Systems AS | Professional & scientific | 2006 |
| Eron AS | Real estate | 2016 |
| Esf Capital AS | Real estate | 2016 |
| Eskerud Hovi Holding AS | | 2024 |
| Et Consulting AS | Professional & scientific | 2012 |
| Eukra Sigma Nuf | Construction | 2022 |