| Bjarte Hannisdal Holding AS | | 2025 |
| Bjelk AS | Construction | 2020 |
| Bjerck Restaurant AS | Hospitality | 2018 |
| Bjerget Capital AS | | 2022 |
| Bjerk Media AS | | 2020 |
| Bjerknes Invest AS | Financial services | 2015 |
| Bjoma Marine Service AS | Real estate | 1971 |
| Bjomark AS | Professional & scientific | 2005 |
| Bjor AS | | 2022 |
| Bjordal Bygg AS | Professional & scientific | 2017 |
| Bjordal Eiendom AS | Real estate | 2022 |
| Bjordal Holding AS | Professional & scientific | 2023 |
| Bjorøy Utvikling AS | Real estate | 2021 |
| Bjostro AS | | 2023 |
| Bjpadvokat AS | Professional & scientific | 2021 |
| BJS Holding AS | | 2005 |
| Bjånes Fjordboliger AS | Real estate | 2013 |
| Bjø Holding AS | Real estate | 2008 |
| Bjørge Forvaltning AS | Real estate | 2005 |
| Bjørge Næringseiendom AS | Real estate | 2009 |
| Bjørgvin Barbersalong AS | Other services | 2018 |
| Bjørgvin Begravelsesbyrå AS | Other services | 2020 |
| Bjørgvin Consulting AS | Information & communication | 2014 |
| Bjørgvin Eiendommer AS | Real estate | 1995 |
| Bjørgvin Fabrikker AS | Real estate | 2003 |
| Bjørgvin Kultursenter AS | | 2023 |
| Bjørgvin Regnskap AS | Professional & scientific | 2013 |
| Bjørgvin Revisjon AS | Professional & scientific | 2005 |
| Bjørgvin Utvikling AS | Real estate | 2007 |
| Bjørgvin Øyeklinikk AS | Health & social care | 2024 |
| Bjørkehagen AS | Financial services | 2005 |
| Bjørkehagen Invest 2 AS | | 2025 |
| Bjørkehagen Invest AS | Real estate | 2003 |
| Bjørkelid Panorama AS | Real estate | 2017 |
| Bjørkevoll Eiendom AS | Hospitality | 2021 |
| Bjørkåsen Utvikling AS | Real estate | 2020 |
| Bjørlykke Vaktmestertjenester Ans | Administrative & support | 2021 |
| Bjørn Breistein AS | | 2013 |
| Bjørn Kjetil Holding AS | | 2026 |
| Bjørn Østensen Holding AS | Financial services | 2005 |
| Bjørnafjorden Holding AS | | 2024 |
| Bjørndalen AS | Real estate | 2017 |
| Bjørndalen Og Hansen Da | Construction | 1995 |
| Bjørndalsstølen 2 AS | Real estate | 2009 |
| Bjørnegløtt AS | | 2021 |
| Bjørnsonsgate 11 AS | Real estate | 2019 |
| Bjørnsonsgate 14 AS | Real estate | 2005 |
| Bjørnsonsgaten 13-15 AS | Real estate | 1999 |
| Bjørnåsen AS | Real estate | 2019 |
| Bk-Invest AS | Professional & scientific | 2023 |
| BK9 Næring AS | Real estate | 2022 |
| Bke Invest AS | Financial services | 2012 |
| BKK AS | Energy | 1996 |
| BKS Invest AS | Financial services | 2005 |
| BKV Bygg AS | Construction | 2014 |
| Blaauw & Co AS | Wholesale & retail | 1973 |
| Blaauw AS | Wholesale & retail | 2006 |
| Blaauw Holding AS | Wholesale & retail | 2005 |
| Blaauw MD AS | Health & social care | 2024 |
| Black & White AS | Wholesale & retail | 1988 |
| Black Holding AS | | 2025 |
| Blackbox Media Ans | Information & communication | 2009 |
| Blanca AS | Information & communication | 2016 |
| Blandr AS | Professional & scientific | 2026 |
| Blank Academy AS | Other services | 2025 |
| Blast Holding AS | Professional & scientific | 2020 |
| Blast Manco AS | Financial services | 2020 |
| Blast Midco AS | Professional & scientific | 2019 |
| Blaze Energy AS | Wholesale & retail | 2025 |
| Bleivassvegen 105B AS | Real estate | 1986 |
| Blekk AS | Arts & recreation | 2016 |
| Bli Enige AS | Professional & scientific | 2025 |
| Bli Fin by Ilan AS | Wholesale & retail | 2022 |
| Blichos AS | Information & communication | 2026 |
| Blikkenslagermester Arvid Holum AS | Real estate | 2017 |
| Blikkfang Media AS | Information & communication | 2014 |
| Blindvei AS | Hospitality | 2020 |
| Blinkfilm AS | Information & communication | 2012 |
| Blitzregn AS | Professional & scientific | 2019 |
| Blkfish Holding AS | | 2019 |
| Blomsterbarna AS | Wholesale & retail | 2022 |
| Blomsterboden AS | Wholesale & retail | 2003 |
| Blomsterdekor Bergen AS | Wholesale & retail | 2014 |
| Blomsterpaviljongen Eiendomsselskap AS | Real estate | 1988 |
| Blue Analytics AS | Professional & scientific | 2020 |
| Blue Aqua Management AS | Agriculture & fishing | 2021 |
| Blue Harvest AS | Wholesale & retail | 2017 |
| Blue Media AS | Information & communication | 2024 |
| Blue Mountain Media AS | Professional & scientific | 2017 |
| Blue Slippers Ltd | Real estate | 2004 |
| Blue Stone Digital AS | Professional & scientific | 2026 |
| Blueberry Investments AS | Professional & scientific | 2022 |
| Bluefin Ventures AS | Information & communication | 2013 |
| Bluemark Holding AS | | 2025 |
| Blueship Chartering AS | Transport & logistics | 2022 |
| Bluestar Asset Management AS | Real estate | 2013 |
| Bluewater AS | Financial services | 2011 |
| BLW Holding AS | Construction | 2023 |
| Blyant AS | Professional & scientific | 2021 |
| Blytt Holding AS | | 2025 |