| Brasserie Hansken AS | Hospitality | 1996 |
| Brasserie Majorstua AS | Hospitality | 1990 |
| Brasserie Til Folket AS | Hospitality | 2020 |
| Brassespark AS | | 2021 |
| Brataas Consult & Invest AS | Financial services | 2017 |
| Bratbakk Holding AS | | 2005 |
| Bratfoss Arkitektur AS | Professional & scientific | 2014 |
| Brathwait AS | | 2013 |
| Bratland Invest AS | | 2018 |
| Bratlie Holding AS | Financial services | 2016 |
| Bratlie Invest AS | Administrative & support | 2014 |
| Bratliparken AS | Real estate | 2021 |
| Bratt Lende AS | Education | 2024 |
| Brattabøelvi Kraft AS | Energy | 2018 |
| Bratte AS | Information & communication | 2021 |
| Brattelia Holding AS | | 2025 |
| Brattemoen Holding AS | Professional & scientific | 2021 |
| Bratterud G Holding AS | | 2023 |
| Brattetveit AS | Financial services | 2005 |
| Brattheng Studios AS | Information & communication | 2025 |
| Bratting Eiendom AS | Real estate | 2022 |
| Brattlikollen Frisør AS | Other services | 2012 |
| Brattlikollen Fysikalske Institutt AS | Health & social care | 2024 |
| Brattlikollen Legesenter Drift AS | Health & social care | 2014 |
| Brattlikollen Stor Kiosk AS | Wholesale & retail | 2017 |
| Brattvåg Offentlig Eiendom AS | Real estate | 2020 |
| Brattås AS | Construction | 1998 |
| Bratwurst.No Da | Hospitality | 2009 |
| Bratziiez Studio AS | Real estate | 2025 |
| Braud AS | Hospitality | 2019 |
| Braut Consulting AS | Information & communication | 2021 |
| Brautbache Investing AS | | 2021 |
| Brauterskog Ans | Agriculture & fishing | 2005 |
| Brauti Eiendom AS | Health & social care | 2016 |
| Brav AS | Manufacturing | 1978 |
| Brava Invest AS | Financial services | 2001 |
| Brava Investments AS | | 2023 |
| Brave Heart AS | Education | 2021 |
| Brave IT AS | Information & communication | 2023 |
| Brave Tern AS | Construction | 2018 |
| Braveharmony AS | Professional & scientific | 2024 |
| Braveheart AS | Professional & scientific | 2017 |
| Braver AS | Professional & scientific | 2016 |
| Bravi Ragazzi AS | | 2024 |
| Bravida Norge AS | Construction | 2004 |
| Bravida Norge Holding AS | Construction | 2012 |
| Bravie Invest AS | | 2023 |
| Braving Investment AS | | 2022 |
| Bravita AS | Health & social care | 2001 |
| Bravo Advisory AS | Professional & scientific | 2017 |
| Bravo AS | Real estate | 2017 |
| Bravo Capital AS | Real estate | 2005 |
| Bravo Delta AS | Information & communication | 2023 |
| Bravo Eiendomsdrift Nuf | Real estate | 2018 |
| Bravo Group AS | Information & communication | 2016 |
| Bravo Intelligence & Technology AS | Information & communication | 2023 |
| Bravo Norge AS | Information & communication | 2013 |
| Bravo Opportunities AS | Professional & scientific | 2021 |
| Bravo Tolk AS | Professional & scientific | 2016 |
| Bravo Ventures AS | | 2019 |
| Bravura Norge AS | Administrative & support | 2022 |
| Bravuur AS | Professional & scientific | 2025 |
| Brax Holding AS | | 2018 |
| Brax Rør AS | Construction | 2019 |
| Brazen AS | Professional & scientific | 2023 |
| Brazil Development AS | Real estate | 2004 |
| BRB Elektro AS | Construction | 2017 |
| Brea AS | Professional & scientific | 2018 |
| Bread & Boxers AS | Wholesale & retail | 2016 |
| Bread N Butter Oslo AS | Manufacturing | 2019 |
| Breakeven Holding AS | Real estate | 2008 |
| Breakfast at Tiffanys AS | Hospitality | 2013 |
| Breaking Marathon Limits AS | Education | 2019 |
| Breaklink AS | Information & communication | 2026 |
| Breakpoint AS | | 2025 |
| Breakwater Capital AS | | 2021 |
| Breasy Da | Professional & scientific | 2024 |
| Breath AS | Information & communication | 2026 |
| Breathe Your Way AS | Education | 2023 |
| Breathex AS | Wholesale & retail | 2019 |
| Brech Invest AS | | 2023 |
| Bred Holding AS | Professional & scientific | 2019 |
| Bred Invest AS | Hospitality | 2017 |
| Bredal & Partnere AS | Wholesale & retail | 1989 |
| Bredal Holding AS | | 2023 |
| Bredal Invest AS | Financial services | 2018 |
| Bredbukta Invest AS | | 2025 |
| Bredbånd Og Kabeltv AS | Construction | 1999 |
| Bredde-Prytz Holding AS | Real estate | 2019 |
| Bredengen AS | Wholesale & retail | 1997 |
| Bredes Vei 13 AS | Real estate | 2016 |
| Bredes Vei 15 AS | Real estate | 2022 |
| Bredland Holding AS | | 2021 |
| Bredmyra 10 AS | Real estate | 2015 |
| Bredmyra 4 AS | Real estate | 2009 |
| Bredochsgate 4 AS | Real estate | 2002 |
| Bredtvetveien AS | Real estate | 2024 |
| Bredvid AS | Information & communication | 2016 |
| Breeze Adventure AS | Education | 2025 |
| Breeze Holding AS | | 2022 |