| BV Holding AS | Real estate | 2015 |
| Bwe AS | Real estate | 2014 |
| Byfogd Paus G 10 AS | Real estate | 2021 |
| Byfogd Paus G 5 Anno 1909 AS | Real estate | 2013 |
| Byfogd Paus G 5 AS | Real estate | 2005 |
| Bygarasjen AS | Transport & logistics | 2006 |
| Bygg & Montering AS | Construction | 2018 |
| Bygg I Vestfold Og Telemark AS | Professional & scientific | 2026 |
| Bygg Og Eiendomsdrift AS | Construction | 2011 |
| Bygg- Og Anleggsdrift AS | Construction | 1990 |
| Byggdrift AS | Construction | 2025 |
| Byggesakskonsulenten AS | Professional & scientific | 2010 |
| Byggesøknad Oslo AS | Professional & scientific | 2020 |
| Byggfirma Ec Da | Construction | 2011 |
| Byggfirma Magnar Larsen AS | Construction | 2001 |
| Byggfirma Stensrud AS | Construction | 2011 |
| Byggmester Andresen AS | Construction | 2018 |
| Byggmester Bent Olav Søli AS | Construction | 1998 |
| Byggmester Bjåen Egeland AS | Administrative & support | 2017 |
| Byggmester Bjørkholt AS | Construction | 2021 |
| Byggmester H&H AS | Construction | 2019 |
| Byggmester H.Kiste AS | Construction | 2017 |
| Byggmester Hermann Haukås AS | Construction | 1993 |
| Byggmester Lauritsen AS | Construction | 1998 |
| Byggmester Ole Martin Liane AS | Construction | 1992 |
| Byggmesterfirmaet Finseth Og Ramsdalen Ans | Construction | 1989 |
| Byggstad AS | Construction | 2024 |
| Bypost AS | Transport & logistics | 2006 |
| Bypost Norge AS | Transport & logistics | 2006 |
| Byrkjeflot Holding AS | Health & social care | 2021 |
| Blomquist på Lie AS | Wholesale & retail | 1980 |
| Bård Henriksen Bilverksted AS | Other services | 2009 |
| Båtopplag AS | Real estate | 2021 |
| Bærum Eiendomsutvikling AS | Real estate | 2004 |
| Bærøyknausene Brygge AS | Arts & recreation | 2022 |
| Bø Holding AS | | 2025 |
| Bø Næringsbygg AS | Real estate | 2011 |
| Bøeprosjekt AS | Mining & quarrying | 1999 |
| Bøgata 70 AS | Real estate | 2016 |
| Bøle 81 AS | Real estate | 2011 |
| Bøle Næringseiendom AS | Real estate | 2006 |
| Bølevegen 131 AS | Real estate | 2020 |
| Bølevegen 152 AS | Real estate | 2018 |
| Bøleveien 150 AS | Real estate | 2011 |
| Bøleveien 79 AS | Real estate | 2016 |
| Bøleveien Eiendom AS | Real estate | 2008 |
| Bøllen & Blondinen Frisør AS | Other services | 2008 |
| C Christoffersen Autolakk AS | Wholesale & retail | 2002 |
| C Christoffersen Farge AS | Wholesale & retail | 1997 |
| C Claussen Eiendom AS | Real estate | 2020 |
| C R Drift AS | Administrative & support | 2025 |
| C. Christoffersen AS | Wholesale & retail | 2002 |
| C.C Norway AS | Wholesale & retail | 2019 |
| C.S Bil Norge AS | Wholesale & retail | 2015 |
| C/C 60 Bygg & Takst AS | Real estate | 2026 |
| Cabin AS | Real estate | 2022 |
| Cafe Reykjavik Ans | Hospitality | 2003 |
| Caffe Vero Norge AS | Wholesale & retail | 2021 |
| Cage Grenland AS | Arts & recreation | 2021 |
| Camahak Holding AS | | 2023 |
| Campane AS | Real estate | 2008 |
| Campen Eiendom AS | Real estate | 2022 |
| Cand Pharm C. Cristoffersen AS | Wholesale & retail | 2005 |
| Candis AS | Manufacturing | 2020 |
| Cao Salong 2 AS | Other services | 2025 |
| Cap 15-8 AS | Real estate | 2024 |
| Cap 15-9 AS | Real estate | 2011 |
| Capo AS | | 2025 |
| Cappelen Offshore Services AS | Mining & quarrying | 2000 |
| Cappelens Gate 6 Eiendom AS | Real estate | 2014 |
| Capricorn Pizza AS | Hospitality | 2017 |
| Cara Sportservice AS | Wholesale & retail | 1986 |
| Carbuhn Holding AS | | 2025 |
| Carlsten Holding AS | Health & social care | 2012 |
| Carmen Design Ans | Wholesale & retail | 1988 |
| Carsten Gudbrandsen Invest AS | Wholesale & retail | 2002 |
| Casino Bingo AS | Arts & recreation | 1998 |
| Casmed AS | Health & social care | 2019 |
| Casper Holmberg Holding AS | Health & social care | 2019 |
| Cazo Holding AS | Construction | 2021 |
| CBP AS | Wholesale & retail | 1996 |
| CBP Tours AS | Administrative & support | 2024 |
| CC Logopedi AS | Health & social care | 2025 |
| CCS Holding AS | Real estate | 2005 |
| CCT Eiendom AS | Real estate | 2012 |
| CCT Holding AS | Real estate | 2010 |
| Celbis Nuf | Wholesale & retail | 2007 |
| Celebrity Fight Night AS | Administrative & support | 2026 |
| Cemit Digital AS | Information & communication | 2018 |
| Cemit Group AS | Professional & scientific | 2018 |
| Centra Ans | Construction | 1991 |
| Cewi Holding AS | | 2021 |
| CF Holding AS | Financial services | 2005 |
| CG Collection AS | Wholesale & retail | 2025 |
| Cgi Group AS | Wholesale & retail | 2005 |
| Chaer Invest AS | | 2021 |
| Charlie Eiendom AS | Real estate | 1999 |
| Charly AS | | 2026 |
| Chg-Meridian Skien AS | Wholesale & retail | 2003 |
| Chili Thai AS | Hospitality | 2022 |