| Bardur AS | Professional & scientific | 2024 |
| Bardus Design Da | Professional & scientific | 2017 |
| Bare AS | Wholesale & retail | 1997 |
| Bare Bao AS | Hospitality | 2017 |
| Bare Bitcoin AS | Information & communication | 2021 |
| Bare Bygg AS | Construction | 2014 |
| Bare Chillern AS | Information & communication | 2025 |
| Bare Egil Band AS | Arts & recreation | 2014 |
| Bare FJ AS | Information & communication | 2023 |
| Bare Frukt & Grønt AS | Wholesale & retail | 2010 |
| Bare Geir AS | Professional & scientific | 2020 |
| Bare Hender Holding AS | | 2025 |
| Bare Holding AS | | 2022 |
| Bare Krøll AS | Arts & recreation | 2020 |
| Bare M AS | Information & communication | 2023 |
| Bare Male AS | Construction | 2017 |
| Bare Mas AS | Professional & scientific | 2018 |
| Bare Mennesker AS | Professional & scientific | 2011 |
| Bare Mitt AS | Professional & scientific | 2021 |
| Bare Petter AS | Information & communication | 2024 |
| Bare Renhold Service AS | Administrative & support | 2016 |
| Bare Rør & Service AS | Construction | 2011 |
| Bare Småtteri AS | Administrative & support | 2022 |
| Bare Stress AS | Wholesale & retail | 2016 |
| Bare Tegn AS | Education | 2024 |
| Bareare Holding AS | Real estate | 2016 |
| Baredesign AS | Professional & scientific | 2016 |
| Bareksten Invest AS | | 2021 |
| Barents Aurora Invest AS | | 2022 |
| Barents Kommunikasjon Ans | Professional & scientific | 1993 |
| Barentsbygg AS | Construction | 2018 |
| Barentsholding AS | Construction | 2019 |
| Barfi Bites AS | Hospitality | 2025 |
| Barfod Brands AS | Professional & scientific | 2020 |
| Barfot AS | | 2024 |
| Bargon AS | | 2025 |
| Bari AS | Real estate | 2005 |
| Baris AS | | 2022 |
| Baris Invest AS | | 2025 |
| Barista Botanica AS | Wholesale & retail | 2023 |
| Bark Avenue AS | Wholesale & retail | 2024 |
| Barkerud Capital AS | Financial services | 2017 |
| Barkeviken AS | Real estate | 2008 |
| Barko AS | | 2020 |
| Barkonsult AS | Wholesale & retail | 1985 |
| Barkost Capital AS | | 2023 |
| Barkost Invest AS | | 2021 |
| Barkoteket AS | | 2026 |
| Barlas Holding AS | | 2025 |
| Barlien Invest AS | Financial services | 2017 |
| Barlinvest AS | Financial services | 2017 |
| Barlinåsen AS | Information & communication | 2022 |
| Barman Holding AS | Professional & scientific | 2020 |
| Barman Invest & Consultancy AS | Professional & scientific | 2020 |
| Barmanager AS | Information & communication | 2024 |
| Barmanns' AS | Transport & logistics | 2012 |
| Barn I Sentrum AS | Education | 2005 |
| Barn I Utvikling AS | Health & social care | 2020 |
| Barna AS | Real estate | 2015 |
| Barnas Holding AS | | 2025 |
| Barnas Hus Norge AS | Wholesale & retail | 2005 |
| Barnas Karusell AS | Administrative & support | 2021 |
| Barnasoase AS | Education | 2021 |
| Barne- Og Ungdomssenteret På Holmlia AS | Health & social care | 1986 |
| Barneadvokatene AS | Professional & scientific | 2025 |
| Barnebordet AS | Information & communication | 2023 |
| Barnef Holding AS | Real estate | 2016 |
| Barnehageforum Da | Information & communication | 2000 |
| Barnehagenvår Josefine AS | Education | 2022 |
| Barnehageressursen AS | Administrative & support | 2004 |
| Barnehagesentralen AS | Administrative & support | 2024 |
| Barnehagevikarer AS | Administrative & support | 2020 |
| BARNEHJERTELEG1 AS | Health & social care | 2026 |
| Barnelege Bård Fossli Jensen AS | Health & social care | 2014 |
| Barnelegen Aas AS | Health & social care | 2014 |
| Barnepasseren Formidling Ans | Health & social care | 1999 |
| Barnepsykologene AS | Health & social care | 2024 |
| Barnerobe AS | Wholesale & retail | 2024 |
| Barnesakkyndig AS | Health & social care | 2025 |
| Barneskatter Grunerløkka AS | Wholesale & retail | 2026 |
| Barneting AS | Professional & scientific | 2015 |
| Barnets Beste AS | Administrative & support | 2021 |
| Barnevernalliansen AS | Health & social care | 2025 |
| Barnevernkompetanse AS | Health & social care | 2024 |
| Barneverntiltaket Aida-Oslo AS | Health & social care | 2018 |
| Barnevognhuset AS | Wholesale & retail | 1982 |
| Barney 2 AS | | 2023 |
| Barney Invest AS | | 2022 |
| Barnholdt AS | Information & communication | 2018 |
| Barnholt Belysningsdesign AS | Construction | 2013 |
| Barokk Invest AS | Real estate | 2007 |
| Barolo Holding AS | | 2018 |
| Baron Bros. AS | Professional & scientific | 2021 |
| Baronen Eiendom AS | Real estate | 1994 |
| Baronessens Holdning AS | Financial services | 2015 |
| Barong Limited Nuf | Wholesale & retail | 2015 |
| Barossa Invest AS | | 2021 |
| Barque AS | Transport & logistics | 1995 |
| Barr Invest AS | | 2025 |
| Barra AS | Manufacturing | 1973 |