| Blånibba AS | Real estate | 1997 |
| Blåsbort Invest AS | Real estate | 2015 |
| Blåsemafian AS | Arts & recreation | 2021 |
| Blåsen Invest AS | | 2021 |
| Blåsten AS | Real estate | 2016 |
| Blåsti AS | Wholesale & retail | 2018 |
| Blått Blod AS | Information & communication | 2026 |
| Blått Hav AS | Professional & scientific | 2010 |
| Blåtunet Eiendomsutvikling AS | | 2024 |
| Blåvingen Invest AS | Real estate | 2021 |
| Blæsbjerg AS | | 2022 |
| Blæst Design Kolonien AS | Professional & scientific | 2001 |
| Blæste Kapital AS | | 2021 |
| Blødekjær 14 AS | Real estate | 2018 |
| BM Boligbygg AS | Construction | 2007 |
| BM Boligutvikling Oslo AS | Real estate | 2023 |
| BM Consult AS | Professional & scientific | 1983 |
| BM Fashion AS | Professional & scientific | 2024 |
| BM Fiskå Holding AS | | 2026 |
| BM Investment AS | | 2021 |
| BM Marin Holding AS | Real estate | 2016 |
| BM Marina AS | Arts & recreation | 2016 |
| BM Proffmaler AS | Construction | 2025 |
| BM Prosjekt Og Utvikling AS | Real estate | 2019 |
| BM Tekst Foto AS | Information & communication | 1988 |
| BM Utleie Og Utvikling AS | Real estate | 2013 |
| BM24.NO AS | Professional & scientific | 2011 |
| BM3 Eiendom AS | Real estate | 2016 |
| BM3 Invest AS | Real estate | 2016 |
| BM6 Eiendom AS | Real estate | 2012 |
| Bma Heisteknisk Rådgivning AS | Professional & scientific | 1995 |
| Bma Rådgivning Holding AS | Professional & scientific | 2021 |
| Bma Rådgivning Holding II AS | | 2021 |
| BMB Paleet AS | Wholesale & retail | 2018 |
| Bme Group AS | Professional & scientific | 2005 |
| BMF Bygg AS | Hospitality | 2022 |
| Bmgmt AS | Professional & scientific | 2025 |
| BMH Invest AS | Real estate | 2001 |
| Bmi AS | Professional & scientific | 2008 |
| BMJ Holding AS | Real estate | 2013 |
| Bmks Holding AS | | 2025 |
| Bmljc Da | Arts & recreation | 2017 |
| BMN AS | Wholesale & retail | 2020 |
| BMN Eiendom AS | Real estate | 2015 |
| BMN Invest AS | Construction | 2015 |
| Bmobile AS | | 2011 |
| BMP Invest AS | Financial services | 2021 |
| Bmpl AS | Information & communication | 2020 |
| BMR AS | Construction | 2011 |
| BMS Heavy Cranes AS | Construction | 2026 |
| BMS Invest AS | Administrative & support | 2005 |
| BMT Utvikling AS | Financial services | 2005 |
| Bmu AS | Information & communication | 2012 |
| BN Energi AS | Construction | 2025 |
| BN Holding AS | Financial services | 2005 |
| BN Lysaker Elveveien AS | Real estate | 2021 |
| BN Oslo AS | Wholesale & retail | 2023 |
| BN Rent Og Grønt AS | Administrative & support | 1996 |
| BN Skansen Invest AS | Real estate | 2005 |
| Bnanalyse AS | Professional & scientific | 2019 |
| BNB AS | Wholesale & retail | 2012 |
| BNB Sandakerveien AS | Manufacturing | 2016 |
| Bnbadmin AS | Real estate | 2023 |
| Bnboslo AS | Hospitality | 2024 |
| Bnbutleie AS | Real estate | 2025 |
| BNC Nordic Distribution AS | Wholesale & retail | 2000 |
| Bndw Invest AS | | 2024 |
| Bne 20LEGEND AS | Real estate | 2000 |
| Bne 254 Vikersund AS | Real estate | 2013 |
| Bne Asker AS | Real estate | 2016 |
| Bne Baneveien 57 AS | Real estate | 1996 |
| Bne Brueland AS | Real estate | 2014 |
| Bne C6 AS | Real estate | 2015 |
| Bne Cecilienborg AS | Real estate | 2013 |
| Bne Egersund AS | Real estate | 2018 |
| Bne Fagernes Narvik AS | Real estate | 2020 |
| Bne Frodegaten 23 AS | Professional & scientific | 2013 |
| Bne Ganddal AS | Real estate | 2014 |
| Bne Godsløkka AS | Real estate | 2019 |
| Bne Godsløkka Bolig AS | Real estate | 2025 |
| Bne Godsløkka Kontor AS | Real estate | 2025 |
| Bne Gruppen AS | Real estate | 2018 |
| Bne Grønland 13 AS | Real estate | 2023 |
| Bne Grønland 32 AS | Real estate | 2019 |
| Bne H31 AS | Real estate | 2025 |
| Bne H32 AS | Real estate | 2025 |
| Bne H33 AS | Real estate | 2025 |
| Bne H34 AS | Real estate | 2025 |
| Bne H35 AS | Real estate | 2025 |
| Bne H36 AS | Real estate | 2025 |
| Bne H37 AS | Real estate | 2025 |
| Bne Hallingdal AS | Real estate | 2015 |
| Bne Hamar Bolig AS | Real estate | 2024 |
| Bne Hamar Strandsonen Infrastruktur AS | Real estate | 2024 |
| Bne Holmestrand II AS | Real estate | 2023 |
| Bne Holmestrand Næringsutvikling AS. | Real estate | 2023 |
| Bne Horten AS | Real estate | 2019 |
| Bne Hvalstad Bolig AS | Real estate | 2018 |
| Bne Hvalstad Næring AS | Real estate | 2018 |
| Bne Hvalstad Parkering AS | Real estate | 2018 |