| Brobekkveien 84 AS | Real estate | 2018 |
| Brobekkveien 90 AS | Real estate | 2005 |
| Brobekkveien Eiendom AS | Real estate | 2005 |
| Brocante AS | Wholesale & retail | 2012 |
| Broch & Co Aksjeselskap | Professional & scientific | 2018 |
| Broch CF Holding AS | | 2018 |
| Broch Ojf Holding AS | | 2018 |
| Brochman & Wiig Invest AS | Administrative & support | 2010 |
| Brochsgate 3 AS | Real estate | 2013 |
| Brock Larsen AS | Professional & scientific | 2024 |
| Brocklin Bygg AS | Construction | 2005 |
| Brocode AS | Information & communication | 2023 |
| Brocon Cash Management AS | Information & communication | 2004 |
| Brocon Gruppen AS | Information & communication | 2020 |
| Brocon Holding AS | Information & communication | 2003 |
| Brocon Inkasso AS | Administrative & support | 2020 |
| Brocon Legal AS | Professional & scientific | 2026 |
| Brocon Management Systems AS | Information & communication | 2021 |
| Brocs AS | Real estate | 2012 |
| Broda & Bogacz AS | Construction | 2021 |
| Brodahl Holding AS | | 2005 |
| Broderi & Laser-Eksperten AS | Manufacturing | 1990 |
| Brodin AS | Construction | 2000 |
| Brodin Holding AS | | 2023 |
| Brodins Rammeverksted AS | Manufacturing | 1998 |
| Brodmont D O O | Construction | 2007 |
| Brodtkorb Holding AS | Professional & scientific | 2019 |
| Broen Eiendomsutvikling AS | | 1995 |
| Broen Holding AS | | 2026 |
| Broke AS | Wholesale & retail | 2025 |
| Brokelandsheia AS | Real estate | 2006 |
| Broken Hearted AS | Professional & scientific | 2025 |
| Broken Oslo AS | Wholesale & retail | 2021 |
| Broker AS | Information & communication | 2015 |
| Broker Holdings Co AS | Financial services | 2022 |
| Broker Restaurantdrift AS | Hospitality | 2013 |
| Brokerwall AS | Information & communication | 2022 |
| Brokio AS | Information & communication | 2025 |
| Brokkr 3D AS | Professional & scientific | 2024 |
| Brokvika AS | Wholesale & retail | 2015 |
| Brokvika Invest AS | | 2018 |
| Broland AS | Financial services | 1998 |
| Bromberg Dagligvare AS | Wholesale & retail | 2015 |
| Bromine AS | Wholesale & retail | 2017 |
| Bromma Eiendom AS | Real estate | 2022 |
| Bronco Trading AS | Professional & scientific | 2011 |
| Bronken Holding AS | | 2025 |
| Bronken Næss Holding AS | | 2025 |
| Bronsestubben Holding AS | | 2023 |
| Brooklyn Grocery AS | | 2021 |
| Brooklyn Invest AS | Real estate | 2000 |
| Brooklyn Investco AS | Financial services | 2019 |
| Broom.No AS | Information & communication | 2007 |
| Bror AS | Real estate | 2005 |
| Bror Løvdal AS | Health & social care | 2002 |
| Bror Produksjon Da | Arts & recreation | 2006 |
| Brorson & Co AS | | 2005 |
| Brorson&Sande AS | Health & social care | 2019 |
| Brosco AS | Transport & logistics | 2004 |
| Brosme AS | | 2023 |
| Brostad AS | Professional & scientific | 2018 |
| Brosten AS | Professional & scientific | 2025 |
| Brostrup AS | Real estate | 2018 |
| Brother Norge, Filial Til Brother Nordic A/S Nuf | Wholesale & retail | 2011 |
| Brotke AS | Transport & logistics | 2017 |
| Brova Idea AS | Information & communication | 2015 |
| Brovs AS | Information & communication | 2015 |
| Brow Rehab AS | Wholesale & retail | 2017 |
| Brow Rehab Cosmetics AS | Wholesale & retail | 2017 |
| Brow Studio Oslo AS | Other services | 2025 |
| Brownske Bevegelser AS | Real estate | 2005 |
| Browser Solutions AS | Information & communication | 2021 |
| Browsome AS | Other services | 2022 |
| Brox Aktiva AS | Professional & scientific | 2020 |
| Brox Enterprises AS | Arts & recreation | 2015 |
| Brox Innovation AS | Professional & scientific | 2021 |
| Brox Markedsføringsbyrå AS | Professional & scientific | 2021 |
| Broxbit AS | Information & communication | 2025 |
| BRR Holding AS | Real estate | 2022 |
| BRS AS | Professional & scientific | 2024 |
| BRS Oslo AS | Transport & logistics | 1999 |
| Brst AS | Information & communication | 2026 |
| Brua Io AS | Information & communication | 2023 |
| Brubakken Invest AS | Real estate | 2005 |
| Brubakkveien 16 AS | Real estate | 1999 |
| Bruce Norway AS | Information & communication | 2019 |
| Brud & Blomst Ans | Wholesale & retail | 2004 |
| Brude Eiendom AS | Real estate | 2012 |
| Brudeblogg Da | Information & communication | 2015 |
| Brudekjolen Oslo AS | Wholesale & retail | 1998 |
| Brudeli Invest AS | | 2020 |
| Brudevold Elektro AS | Construction | 2018 |
| Brudevold Holding AS | Real estate | 2019 |
| Brudevold-Elektro AS | Construction | 2025 |
| Brudevoll Invest AS | | 2023 |
| Brudvik Holding AS | | 2019 |
| Bruel International | Administrative & support | 2002 |
| Bruer Holding AS | Financial services | 2013 |
| Brufladt Trening AS | Education | 2020 |
| Brugata 10 AS | Real estate | 2017 |