| Bruket Brygge Marina AS | Arts & recreation | 2019 |
| Bruket Kontorfellesskap AS | Real estate | 2014 |
| Bruket Næringspark AS | Real estate | 2005 |
| Brunfoss AS | Real estate | 2014 |
| Brustad Totalbygg AS | Construction | 2025 |
| Bruun Holding AS | | 2005 |
| Brygge Og Skjærgård AS | Construction | 2013 |
| Brødr. Lie AS | Construction | 2022 |
| Brødr. Lie Eiendom AS | Real estate | 2022 |
| Brødrene Helgesen Holding AS | Wholesale & retail | 2014 |
| Brønnboringshuset AS | Real estate | 1989 |
| BT Invest AS | Financial services | 2018 |
| Bullseye Consulting Ans | Administrative & support | 2005 |
| Byebuy AS | Information & communication | 2020 |
| Bygg & Tømrerfirma Morten Asbjørnsen AS | Construction | 2017 |
| Byggm. Lars Woxen AS | Construction | 2019 |
| Byggmester Bengt Olsen AS | Construction | 2016 |
| Byggmester Magnus Johansen AS | Construction | 2011 |
| Byggmester Tor E Johansen AS | Construction | 1996 |
| Byggmester Vidar Huth AS | Construction | 1994 |
| Båtbua Invest AS | Wholesale & retail | 2005 |
| C.Trondsen Holding AS | | 2024 |
| Cajaco AS | | 2023 |
| Campeo AS | Wholesale & retail | 2023 |
| Campingliv AS | Wholesale & retail | 2020 |
| Carisma Invest AS | | 2021 |
| Carukriben AS | Hospitality | 2010 |
| Casamare Invest AS | Financial services | 2012 |
| Cecilie Invest AS | | 2019 |
| Ceralia AS | Administrative & support | 2014 |
| Charles Eiendom AS | Real estate | 2015 |
| Charles Holding AS | Real estate | 2009 |
| Christensen AS Bakeri Og Konditori | Wholesale & retail | 1970 |
| Christensen Bakeri Eiendom AS | Wholesale & retail | 2013 |
| Christensen Bakeri Holding AS | Manufacturing | 2005 |
| Christensen Bakeriutsalg Og Cafeer AS | Hospitality | 2025 |
| Christina's AS | Wholesale & retail | 2007 |
| Classic Auto AS | Wholesale & retail | 2006 |
| Clementz AS | Professional & scientific | 2017 |
| CML Tech AS | | 2021 |
| Colortec AS | Other services | 1995 |
| Colortec Holding AS | | 2016 |
| Confetti AS | Wholesale & retail | 2025 |
| Construction Team Norway AS | Construction | 2015 |
| Constructum AS | Construction | 2015 |
| Constructum Core AS | Construction | 2026 |
| Consulting AS | Information & communication | 2026 |
| Contractor AS | Construction | 2025 |
| Core Market AS | | 2026 |
| Courant AS | Information & communication | 2026 |
| CWB Holding AS | | 2026 |
| Cwj-Holding AS | | 2025 |
| D. Halvorsen Holding AS | | 2020 |
| Dahle Eiendom & Invest AS | Real estate | 2022 |
| Dahle-Transport AS | Transport & logistics | 2022 |
| Dahlias Da | Professional & scientific | 2022 |
| Daio Hus AS | Construction | 2023 |
| David Svensen AS | Real estate | 2020 |
| DH Holding AS | Professional & scientific | 2005 |
| Diamant Bilpleie & Bilsalg AS | Other services | 2019 |
| Didrik Invest AS | Financial services | 2012 |
| Din Dag AS | Wholesale & retail | 2022 |
| Direct House Fredrikstad AS | Manufacturing | 2022 |
| Div AS | | 2020 |
| Dona Invest AS | Real estate | 2021 |
| Dråpe Bilpleie AS | Other services | 2026 |
| Dsva Drift AS | Water & waste | 2015 |
| Dypedal Båthavn AS | Transport & logistics | 2015 |
| Døling Invest AS | | 2025 |
| E Engebretsen Holding AS | | 2025 |
| E Rønning Holding AS | | 2026 |
| E. S. Huth AS | Health & social care | 2025 |
| E.H. Klemsdal AS | | 2013 |
| E.J. Byggservice AS | Construction | 2017 |
| Egil Norli AS | Construction | 1992 |
| Eidsvoll Lagerseksjoner AS | Real estate | 2021 |
| Eiendomsselskapet Pejkon AS | Real estate | 1987 |
| Eiendomsutvikling AS | Real estate | 2013 |
| Eikenøtt Bygg AS | Construction | 2026 |
| Ek Gårdspakkeri AS | Agriculture & fishing | 1999 |
| Ekely Eiendomsselskap Holding AS | | 2025 |
| Eliassen's Byggeservice AS | Construction | 2011 |
| Elle Melle Ans | Wholesale & retail | 2004 |
| Eloop AS | Education | 2014 |
| Elpress AS | Professional & scientific | 2020 |
| Embla Helse AS | Health & social care | 2022 |
| Emmali AS | Other services | 2021 |
| Encripto AS | Information & communication | 2010 |
| Engelsviken Lagerseksjoner AS | Real estate | 2026 |
| Enres Eiendom AS | Real estate | 2022 |
| Enøk Elektroinstallasjon AS | Construction | 2007 |
| Eom Holding AS | Financial services | 2014 |
| Equilink Holding AS | | 2021 |
| Erik Kirkerød Transport AS | Transport & logistics | 2013 |
| Etna Holdings AS | Real estate | 2004 |
| Even O Jensen AS | Construction | 1986 |
| Eø Holding AS | Wholesale & retail | 2021 |
| F Andersen Invest AS | Real estate | 2005 |
| F. Solem Holding AS | Construction | 2021 |
| Faratangen Samvirke SA | Water & waste | 2010 |