| Brainwork SP. Z O.O. Nuf | Other services | 2025 |
| Braive AS | Information & communication | 2015 |
| Braiz AS | Information & communication | 2023 |
| Brak Buldring AS | Arts & recreation | 2025 |
| Brak Buldring Holding AS | | 2025 |
| Brakar Utvikling AS | Real estate | 2019 |
| Brakarer AS | Construction | 2024 |
| Brakastølen Invest AS | | 2022 |
| Brakerøya Tomteselskap AS | Real estate | 2016 |
| Brakkeinvest AS | Real estate | 2004 |
| Brakkinvest AS | Real estate | 2026 |
| Braktor Invest AS | | 2023 |
| Bralanta Invest AS | Other services | 2005 |
| Bram Eiendomsforvaltning AS | Real estate | 1986 |
| Brama Holding AS | | 2012 |
| Bramax AS | Real estate | 2019 |
| Brambani Holding AS | Financial services | 2012 |
| Bramfri AS | Information & communication | 2025 |
| Bramley Invest AS | | 2023 |
| Bramor AS | Real estate | 2005 |
| Bramora AS | Real estate | 2005 |
| Bramserud Advertising AS | | 2025 |
| Branch Group AS | Wholesale & retail | 2002 |
| Branchy Rekruttering AS | Administrative & support | 2020 |
| Brand by Market AS | Wholesale & retail | 2008 |
| Brand Communication AS | Manufacturing | 1995 |
| Brand Dialog AS | Wholesale & retail | 2003 |
| Brand Factory Norge AS | Professional & scientific | 2003 |
| Brand Machine AS | Professional & scientific | 2011 |
| Brand New World AS | Professional & scientific | 2013 |
| Brand Partners AS | Wholesale & retail | 2021 |
| Brand Sport AS | Wholesale & retail | 2015 |
| Brand Valley AS | Professional & scientific | 2014 |
| Brand-Aid AS | Professional & scientific | 1997 |
| Brandbassador AS | Information & communication | 2015 |
| Brandboost AS | Administrative & support | 2019 |
| Brandbu Byggservice AS | Construction | 2006 |
| Brandbuilder AS | Information & communication | 2023 |
| Brandcollect Norway AS | Wholesale & retail | 2008 |
| Brandcom AS | Professional & scientific | 2004 |
| Brandenberger+More AS | Professional & scientific | 1985 |
| Brandfirst Group AS | Wholesale & retail | 2023 |
| Brandgate AS | Information & communication | 2011 |
| Brandhaug Invest AS | | 2020 |
| Brandhouse Design AS | Professional & scientific | 2000 |
| Brandhouse Ness AS | Professional & scientific | 2024 |
| Branding Lady Ingelin Aabø AS | Education | 2014 |
| Brandl Design Og Arkitektur AS | Professional & scientific | 2012 |
| Brandma AS | Professional & scientific | 2014 |
| Brandmark Consulting AS | Professional & scientific | 2000 |
| Brandmark Holding AS | Professional & scientific | 1999 |
| Brandpartner Company AS | Wholesale & retail | 2002 |
| Brandpeople AS | Professional & scientific | 2014 |
| Brandr Gruppen AS | Wholesale & retail | 2018 |
| Brandrud Holding AS | Professional & scientific | 2005 |
| Brands 21 AS | Wholesale & retail | 2016 |
| Brands 21 Drammen AS | Wholesale & retail | 2015 |
| Brands 21 Kremmertorget AS | Real estate | 2017 |
| Brands Collective AS | Other services | 2025 |
| Brands of Europe AS | Wholesale & retail | 2016 |
| Brands Outlet AS | Wholesale & retail | 2012 |
| Brandsen AS | Energy | 2018 |
| Brandsforbrands AS | Professional & scientific | 2021 |
| Brandsnes Invest AS | | 2022 |
| Brandstad Eftf AS | Wholesale & retail | 2020 |
| Brandstasjonen AS | Professional & scientific | 2009 |
| Brandstory AS | Professional & scientific | 2025 |
| Brandsupply AS | Professional & scientific | 2025 |
| Brandt Capital AS | | 2025 |
| Brandtx AS | | 2025 |
| Brandworx AS | Information & communication | 2014 |
| Brandy Melville Oslo AS | Wholesale & retail | 2014 |
| Branksea AS | Professional & scientific | 2021 |
| Brannalarmspesialisten AS | Construction | 2022 |
| Brannfag AS | Professional & scientific | 2016 |
| Brannfjell Eiendom AS | Financial services | 2005 |
| Brannkonsulentene AS | Professional & scientific | 2017 |
| Brannkonsult AS | Professional & scientific | 2013 |
| Brannrådgiver Ullerud AS | Professional & scientific | 2025 |
| Brannservice Østlandet AS | Wholesale & retail | 1988 |
| Branntek AS | Construction | 2019 |
| Branor Eiendom AS | Real estate | 1987 |
| Bransjesenteret Gardermoen Næringspark AS | Real estate | 1997 |
| Brante AS | Professional & scientific | 2005 |
| Brantenberg AS | Financial services | 2005 |
| Brantenborg AS | Real estate | 1987 |
| Brantenborgveien 9 AS | Real estate | 2010 |
| Brar Eiendom AS | Real estate | 2010 |
| Brar Holding AS | Hospitality | 2008 |
| Bras Holding AS | Real estate | 2005 |
| Bras Kapital AS | Real estate | 2006 |
| Brasgas AS | Administrative & support | 2007 |
| Brash Design Agency Nuf | Professional & scientific | 2021 |
| Brasil Real AS | Real estate | 2006 |
| Brasilia Holding AS | Hospitality | 2021 |
| Brasilia Oslo AS | Hospitality | 2019 |
| Brask & Bram AS | Real estate | 2005 |
| Brask Og Bram AS | Real estate | 2008 |
| Brass Management AS | Professional & scientific | 2024 |
| Brass Monkey AS | | 2020 |