| Bjerkedalen Garasjelag SA | Real estate | 1963 |
| Bjerkegruppen Eiendom AS | Real estate | 2019 |
| Bjerkely Invest AS | | 2022 |
| Bjerkerooth Eiendom AS | Real estate | 1997 |
| Bjerkes Ruter AS | Construction | 2015 |
| Bjerkeskau Holding AS | | 2018 |
| Bjerkesti Elektro AS | Construction | 2025 |
| Bjerkesti Holding AS | | 2023 |
| Bjerketo Holding AS | | 2020 |
| Bjerkevoll AS | | 2025 |
| Bjerklind Bygg AS | Construction | 1987 |
| Bjerknes AS | | 2019 |
| Bjerkodden Invest AS | | 2023 |
| Bjerkvik Defence AS | Information & communication | 2025 |
| Bjerkås Næringspark AS | Real estate | 2018 |
| Bjerkås Næringstomter AS | Real estate | 2008 |
| Bjermeland Holding AS | | 2025 |
| Bjerregaarden AS | | 2023 |
| Bjerregaardsgate 13 AS | | 2025 |
| Bjerregaardsgate 18 AS | Real estate | 2005 |
| Bjerregaardsgt 18 III Ans | Real estate | 2004 |
| Bjerregaardsgt Frukt Og Tobakk Ans | | 1989 |
| Bjertnes Eiendom AS | Real estate | 2006 |
| Bjertnes Holding AS | | 2023 |
| Bjertnes Invest AS | | 2021 |
| Bjertnesveien 4 AS | Real estate | 2022 |
| Bjerve AS | Construction | 2022 |
| BJH Eiendom AS | Real estate | 2019 |
| BJH Invest AS | Real estate | 2006 |
| BJK AS | Administrative & support | 2025 |
| BJN 100 AS | Wholesale & retail | 2026 |
| Bjoerk Holding AS | | 2024 |
| Bjoerk Media - Digitale Salgssystemer AS | | 2018 |
| Bjoern AS | Health & social care | 2021 |
| Bjonge Smia AS | Real estate | 2022 |
| Bjonskog Almenning Da | Agriculture & fishing | 1913 |
| Bjorbekk Terrasse AS | Real estate | 2011 |
| Bjorland Invest AS | Construction | 2023 |
| Bjornstad Invest AS | Financial services | 2019 |
| Bjorvatn Oien AS | | 2021 |
| BJR Holding AS | Information & communication | 2005 |
| BJR International AS | Professional & scientific | 2011 |
| Bjsa Holding AS | Financial services | 2013 |
| BJT Invest AS | | 2021 |
| Bju Invest AS | | 2023 |
| Bjug a. Borgund AS | Professional & scientific | 1983 |
| Bjune & Hansen Holding AS | Real estate | 2025 |
| Bjune Holding AS | Real estate | 2012 |
| Bjur Holding AS | | 2025 |
| Bjuråga Kraft AS | Energy | 2018 |
| Bjåland Consult AS | Wholesale & retail | 1995 |
| Bjålids Autoglass AS | Other services | 2004 |
| Björn Energy AS | | 2019 |
| Björn S Invest AS | | 2021 |
| Björnholm AS | Hospitality | 2024 |
| Björntvedt Innspillingsrettigheter AS | Information & communication | 2024 |
| Björntvedt MCG AS | Arts & recreation | 2021 |
| Bjøba AS | Real estate | 2005 |
| Bjøberg Eiendom AS | Real estate | 2011 |
| Bjøkri Media AS | Information & communication | 2024 |
| Bjøl Eiendom AS | Real estate | 2002 |
| Bjølsand Invest AS | | 2021 |
| Bjølsen Avfallsforretning AS | Transport & logistics | 2012 |
| Bjølsen Brug AS | Real estate | 1968 |
| Bjølsen Holding AS | | 2022 |
| Bjølsen Hud & Velvære AS | Other services | 2017 |
| Bjølsen Legesenter AS | Health & social care | 2020 |
| Bjølsen Rør AS | Construction | 2020 |
| Bjølsen Rørservice AS | Construction | 2022 |
| Bjølsen Tannklinikk AS | Health & social care | 2021 |
| Bjølsendumpa Skurlag II AS | | 2024 |
| Bjølsenhallen Da | Real estate | 2001 |
| Bjølstad Utvikling AS | Real estate | 2013 |
| Bjøndal Holding AS | Professional & scientific | 2024 |
| Bjønnavarden AS | Professional & scientific | 2022 |
| Bjønndalsveien 7 Eiendom AS | Real estate | 2016 |
| Bjønndalsveien 7 Eiendomsinvest AS | Real estate | 2016 |
| Bjønnåsen Eiendom AS | Real estate | 2019 |
| Bjørbekk & Lindheim AS | Professional & scientific | 1987 |
| Bjørdal Invest AS | Real estate | 2005 |
| Bjørg Fjell Administrasjon AS | Administrative & support | 2003 |
| Bjørg Fjell AS | Administrative & support | 1989 |
| Bjørg Fjell Gruppen AS | Administrative & support | 1985 |
| Bjørg Gretes Danseskole AS | Education | 2020 |
| Bjørg Jewellery Norge Nuf | Professional & scientific | 2016 |
| Bjørg Thorhallsdottir AS | Arts & recreation | 2009 |
| Bjørgo Fysioterapi AS | Health & social care | 2022 |
| Bjørgulv Stavenes Holding AS | Real estate | 2005 |
| Bjørgum Invest AS | Real estate | 2021 |
| Bjørgvin AS | | 2021 |
| Bjørholt Invest AS | Professional & scientific | 2005 |
| Bjørhovde & Kase Invest AS | | 2018 |
| Bjørk Holding AS | Professional & scientific | 2016 |
| Bjørk Invest AS | Professional & scientific | 1997 |
| Bjørk Modeller AS | Wholesale & retail | 1975 |
| Bjørke-Tranberg AS | Financial services | 2013 |
| Bjørkelangen Næringseiendom AS | Real estate | 2021 |
| Bjørkelund Kapital AS | | 2026 |
| Bjørkelund Legetjenester AS | Health & social care | 2026 |
| Bjørkhagen AS | Manufacturing | 2022 |