| Boland Vika AS | Wholesale & retail | 1992 |
| Boligbygger'N Heggstad AS | Construction | 2015 |
| Bolighus Norge AS | Construction | 2023 |
| Boligkonsept Norge AS | Administrative & support | 2013 |
| Bolseth Gruppen AS | Construction | 2012 |
| Boman Holding AS | Wholesale & retail | 2024 |
| Bombini AS | | 2025 |
| Bond Holding AS | Information & communication | 2007 |
| Bondevik Invest AS | Financial services | 2016 |
| Bone Density AS | Professional & scientific | 2022 |
| Bopel Eiendom AS | Real estate | 2021 |
| Bordal Bygg & Utleie AS | Construction | 2012 |
| Bordal Bygg AS | Construction | 2023 |
| Borg AS | Real estate | 1989 |
| Borga AS | | 2022 |
| Borgan Eiendom AS | Real estate | 2015 |
| Borgen-Bygg AS | Real estate | 2020 |
| Borgstuen AS | Professional & scientific | 1994 |
| Borgund AS | Real estate | 2018 |
| Borgund Eiendom AS | Real estate | 1998 |
| Borgund Eiendomsmegling AS | Real estate | 2020 |
| Borgund Industri AS | Professional & scientific | 1984 |
| Borgund Invest AS | Professional & scientific | 1995 |
| Borgund Legekontor AS | Health & social care | 2012 |
| Borgund Mest AS | Real estate | 2015 |
| Borgund Park AS | Real estate | 1993 |
| Borgund Pizza AS | Hospitality | 2020 |
| Borgundfjordveien 108 AS | Real estate | 2013 |
| Borgundfjordveien 116 AS | Real estate | 2001 |
| Borgundfjordveien 58 AS | Manufacturing | 2007 |
| Borgundvegen 472 AS | Real estate | 2025 |
| Borgundvegen Boligutvikling AS | Real estate | 2014 |
| Borgundveien Barnehage AS | Education | 2018 |
| Bossit Da | Professional & scientific | 2024 |
| Bover Holding AS | | 2022 |
| Bowie AS | Other services | 2019 |
| Bra Barn AS | Health & social care | 2024 |
| Bra Eie Holding AS | Other services | 2025 |
| Bra Hud AS | Other services | 2025 |
| Bra Nord AS | Professional & scientific | 2025 |
| Brabo AS | Real estate | 2000 |
| Bragd AS | Information & communication | 1996 |
| Bragd Digital AS | Administrative & support | 2015 |
| Brages Bilskadesenter AS | Other services | 2013 |
| Brages Bruktbil AS | Wholesale & retail | 2023 |
| Brages Eiendom II AS | Real estate | 2019 |
| Brages Holding AS | Wholesale & retail | 2012 |
| Brakara Holding AS | | 2020 |
| Brannsikring Reite AS | Professional & scientific | 2025 |
| Brarom AS | Real estate | 2021 |
| Bratteng Fure Holding AS | | 2025 |
| Brattvåg Brygge AS | Real estate | 2019 |
| Brauta AS | | 2021 |
| Brauteknausen Medical AS | Health & social care | 2025 |
| Bravo Blomster AS | Wholesale & retail | 2011 |
| Brazz Bros AS | Arts & recreation | 1992 |
| Breidablik AS | Professional & scientific | 2025 |
| Breivika Bil AS | Wholesale & retail | 2005 |
| Breivika Brygge AS | Real estate | 2021 |
| Breivika Holding AS | | 2020 |
| Breivika Industriveg 33 AS | Real estate | 1996 |
| Breivika Industriveg 4 AS | Real estate | 2020 |
| Breivika Industriveg 40 AS | Real estate | 2022 |
| Breivika Industriveg 48 AS | Real estate | 2019 |
| Breivika Industriveg 63 AS | Real estate | 2015 |
| Breivika Industrivei 41 AS | Real estate | 2011 |
| Breivika Industrivei 65 AS | Real estate | 1976 |
| Breivika Industrivei 69 AS | Real estate | 2011 |
| Breivika Regnskap Og Rådgivning AS | Professional & scientific | 2020 |
| Brekke Ur Og Gull AS | Wholesale & retail | 2014 |
| Brendhaugen Invest AS | Real estate | 2002 |
| BRH AS | | 2023 |
| Brightworks Properties AS | Real estate | 2022 |
| Brilleglede AS | Wholesale & retail | 1999 |
| Brilliant Holding AS | Real estate | 2000 |
| Brilliant Invest AS | Financial services | 2019 |
| Brimstrond AS | Professional & scientific | 2012 |
| Brisk AS | Health & social care | 2020 |
| Brisk Bakeri AS | Manufacturing | 2020 |
| Brisk Barnehage AS | Education | 2022 |
| Brisk Karriere AS | Health & social care | 1968 |
| Brisk Tjenester AS | Hospitality | 2025 |
| Brisk Utvikling AS | Health & social care | 2020 |
| Brito AS | Professional & scientific | 2007 |
| Brix AS | Real estate | 2025 |
| Bro AS | Hospitality | 2017 |
| Brogata 1 Dagligvarer AS | Wholesale & retail | 2010 |
| Brosundet AS | Real estate | 2018 |
| Brosundet Eiendom AS | Real estate | 1990 |
| Brosundet Holding AS | Real estate | 2014 |
| Brosundet Invest AS | Real estate | 2005 |
| Brosundklinikken AS | Health & social care | 2024 |
| Brosundklinikken Holding AS | Health & social care | 2024 |
| BRP Holding AS | Construction | 2021 |
| Brrad Holding AS | Construction | 2014 |
| Bru AS | Administrative & support | 2026 |
| Brudeholmen AS | Real estate | 2000 |
| Bruhagen Eiendom AS | Real estate | 2008 |
| Brukerlaget Skråvika SA | Real estate | 2024 |
| Bruket Pub & Resturant Da | Hospitality | 2003 |