| B. Andersen Holding AS | Transport & logistics | 2019 |
| Bac AS | | 2018 |
| Balmins AS | Financial services | 2016 |
| Bantry Invest AS | | 2019 |
| Bare Borghild AS | Professional & scientific | 2025 |
| Bare Kjekt AS | Arts & recreation | 1997 |
| Barekjør AS | Administrative & support | 2026 |
| Barratt AS | Administrative & support | 2016 |
| Barsnes Invest AS | Professional & scientific | 2005 |
| Baug IT AS | Information & communication | 2018 |
| Baustad Aero AS | | 2021 |
| Baxter Invest AS | Real estate | 2007 |
| BB Kilden Madla AS | Hospitality | 2025 |
| BDC Health AS | | 2020 |
| Beate Løkken Stevens Invest AS | | 2022 |
| Bebe Programvare Ans | Wholesale & retail | 1992 |
| Bebekon AS | Professional & scientific | 2009 |
| Bedre Burger 4 AS | Hospitality | 2022 |
| Bejo Invest AS | Real estate | 2019 |
| Bellesen Invest AS | Financial services | 2018 |
| Ben Invest AS | Agriculture & fishing | 2005 |
| Ben Redic Holding AS | | 2024 |
| Benestad Properties AS | Real estate | 2005 |
| Berg Feriebolig AS | Real estate | 2019 |
| Berg Force & Performance AS | Education | 2025 |
| Berg Healthcare AS | Health & social care | 2013 |
| Berg-Larsen Eiendom AS | Real estate | 2000 |
| Bergebekk Eiendom AS | Real estate | 1998 |
| Bergebekk Holding AS | Real estate | 2005 |
| Bergebo AS | Construction | 2012 |
| Bergen Expo AS | Administrative & support | 2018 |
| Bergesen Eiendom AS | Real estate | 1998 |
| Bergesen Invest AS | Real estate | 2005 |
| Berggraf Psykologtjenester AS | Health & social care | 2020 |
| Bergsmauet AS | Real estate | 2005 |
| Bergsvik Fisk AS | Agriculture & fishing | 2008 |
| Bergtor 2 AS | Real estate | 2011 |
| Bergtor 3 AS | Real estate | 2011 |
| Bergtor Investering 2 AS | Real estate | 2016 |
| Bergtor Investering 3 AS | Real estate | 2016 |
| Bernt Helland AS | | 2019 |
| Bestservice Holding AS | Real estate | 2002 |
| Bhag AS | Professional & scientific | 2019 |
| Bhre Norge AS | | 2022 |
| Bik Holding AS | Financial services | 2007 |
| Bilfabrikken AS | Wholesale & retail | 2011 |
| Bilos Kebab Og Pizza House AS | Hospitality | 2025 |
| Birkedal Finans AS | Financial services | 2014 |
| Birkemo Photography AS | Professional & scientific | 2026 |
| Bisi Invest AS | Other services | 2013 |
| Bisi Rens & Vask AS | Other services | 2011 |
| Bisi Services AS | Administrative & support | 2019 |
| Bittens Babyklær AS | Real estate | 1975 |
| Biwi Da | | 1997 |
| Bjarte Dybvik AS | Professional & scientific | 2008 |
| Bjellandbygg AS | Construction | 2012 |
| Bjellcon Holding AS | | 2020 |
| Bjørheim Eiendom AS | Real estate | 1986 |
| Bjørheim Holding AS | Real estate | 2012 |
| Bjørke Rådgivning AS | Information & communication | 2026 |
| Bjørken Invest AS | | 2024 |
| Bjørkhaug Investering AS | Construction | 2018 |
| Bjørkholt Invest AS | Professional & scientific | 2012 |
| Bjørndal Rådgivning AS | Professional & scientific | 2008 |
| Bjørnsen Invest AS | Real estate | 2020 |
| BK Eiendom 1 AS | Real estate | 2018 |
| BKS Utleie & Service AS | Administrative & support | 2025 |
| Blh-Dom Safety Solutions AS | Education | 2013 |
| Blink AS | | 2024 |
| Bloch-Lothe Eiendom AS | Real estate | 2013 |
| Bloomington AS | Wholesale & retail | 2024 |
| Bluebird Ventures AS | | 2023 |
| Bluemind AS | | 2019 |
| Bluewave Invest AS | | 2024 |
| BM Investering AS | Financial services | 2017 |
| Bme Holdco AS | | 2024 |
| BMS IT AS | Information & communication | 2010 |
| Boligfornying AS | Real estate | 2006 |
| Bolton Holdings AS | | 2025 |
| Bomiljø Østervåg Ans | Wholesale & retail | 1991 |
| Bonao Invest AS | Professional & scientific | 2005 |
| Bonite AS | Hospitality | 2005 |
| Bonnevie AS | Professional & scientific | 2017 |
| Bonsol AS | Professional & scientific | 2023 |
| Booksauna AS | Administrative & support | 2023 |
| Booksauna Da | Administrative & support | 2023 |
| Boreal Travel AS | Transport & logistics | 1987 |
| Bouncing AS | Administrative & support | 2022 |
| Boxfactor AS | Wholesale & retail | 2017 |
| Bra Invest AS | Real estate | 1998 |
| Bra Mari Invest AS | Real estate | 2014 |
| Braade II AS | Hospitality | 2022 |
| Brak Holding AS | Professional & scientific | 2006 |
| Brakstad AS | Real estate | 2023 |
| Bravo Invest AS | Financial services | 2005 |
| Breifond AS | | 2026 |
| Briander AS | | 2023 |
| Brora Invest AS | | 2021 |
| Brs-Holding AS | Real estate | 2005 |
| Bruses AS | | 2012 |