| Barracuda Invest AS | Real estate | 1998 |
| Barracuda R&D AS | Education | 2012 |
| Barralis AS | Real estate | 2026 |
| Barramon Servering AS | Hospitality | 2012 |
| Barramon Sommerro AS | Hospitality | 2021 |
| Barratt Due Eiendom AS | Real estate | 1987 |
| Barratt Due Prosjekt AS | Administrative & support | 2019 |
| Barratt Kafedrift AS | Hospitality | 2013 |
| Barreng Strategiskmindset AS | Professional & scientific | 2017 |
| Barrie & Beyond AS | Professional & scientific | 2025 |
| Barron Holding AS | | 2020 |
| Barry Eiendom AS | Real estate | 2018 |
| Barsan Global Logistics AS | Professional & scientific | 2019 |
| Barservice AS | Administrative & support | 2013 |
| Barske Gleder AS | Information & communication | 1995 |
| Barsnes Helse AS | Health & social care | 2023 |
| Barstad Eiendom AS | Real estate | 2018 |
| Barstølveien 60A AS | Real estate | 2005 |
| Bartar AS | Wholesale & retail | 2020 |
| Barth Holding AS | Real estate | 2007 |
| Bartinli & Bartinli Communications AS | Hospitality | 2013 |
| Bartolini AS | Wholesale & retail | 2015 |
| Baru AS | Information & communication | 2022 |
| Bary Holding AS | Wholesale & retail | 2026 |
| Bas & Van Steenis Photography AS | Information & communication | 2026 |
| Bas & Van Steenis Photography Nuf | Information & communication | 2026 |
| Bas Corp AS | | 2018 |
| Bas Kommunikasjon AS | Professional & scientific | 2000 |
| Bas Prosjekt AS | Construction | 2020 |
| Bas Rør AS | Construction | 2024 |
| Bas Taxi AS | Transport & logistics | 2022 |
| Bas-Prosjektutvikling Bruvoll AS | Real estate | 1972 |
| Basal AS | Professional & scientific | 2001 |
| Basaltkroken AS | | 2025 |
| Basaltveien 20 AS | Education | 2017 |
| Basar Studio AS | Professional & scientific | 2025 |
| Bascap AS | | 2019 |
| Base AS | Real estate | 2018 |
| Base Foundation AS | Health & social care | 2025 |
| Base Marine AS | Transport & logistics | 2015 |
| Base Marine Norway AS | Transport & logistics | 2016 |
| Base Marine Solutions AS | | 2024 |
| Base Offshore AS | Transport & logistics | 1978 |
| Base Society AS | Professional & scientific | 2024 |
| Base Wardrobe AS | Wholesale & retail | 2026 |
| Basecamp AS | Professional & scientific | 2021 |
| Basecamp Explorer AS | | 1998 |
| Basecamp Promotion Da | Professional & scientific | 1988 |
| Baseform AS | Wholesale & retail | 2026 |
| BASEL9 AS | Information & communication | 2026 |
| Baseline AS | Professional & scientific | 2020 |
| Baseline Formulations AS | Wholesale & retail | 2025 |
| Basen Kapital AS | | 2007 |
| Basenordic AS | Information & communication | 2016 |
| Baseplan AS | Real estate | 2013 |
| Basepoint Invest AS | | 2023 |
| Basf AS | Manufacturing | 1917 |
| Basf Coatings Services AB | Wholesale & retail | 1995 |
| Basf SE | Wholesale & retail | 2010 |
| Bashir Eiendom AS | | 2005 |
| Bashir Utleie AS | Real estate | 2022 |
| Basic Holding AS | Arts & recreation | 2006 |
| Basic Norge AS | Arts & recreation | 2004 |
| Basic Partner AS | | 1998 |
| Basicliving AS | Wholesale & retail | 2021 |
| Basicneeds AS | Information & communication | 2024 |
| Basil AS | | 2019 |
| Basis Helse AS | Health & social care | 2006 |
| Basis.No AS | Information & communication | 2011 |
| Basketcase AS | Professional & scientific | 2015 |
| Bass Invest Holding AS | | 1988 |
| Bassanova AS | Wholesale & retail | 2015 |
| Bassari Invest AS | Real estate | 2024 |
| Basse Pizza AS | Hospitality | 2025 |
| Basseløkka Oppgang D AS | Real estate | 2021 |
| Bassen Capital AS | Professional & scientific | 2020 |
| Bassengbakken 1 AS | Real estate | 2011 |
| Bassengvegen 5 AS | Real estate | 2025 |
| Bassern AS | | 2020 |
| Basset AS | Financial services | 2010 |
| Basset Holding AS | Financial services | 2010 |
| Bassett Investments AS | | 2023 |
| Bassfalt AS | Information & communication | 2022 |
| Bassifos Marine Solutions Norway AS | Professional & scientific | 2025 |
| Basso Oslo AS | Hospitality | 2020 |
| Bassoe Rig Partners Ltd | Mining & quarrying | 2001 |
| Bassoka AS | | 2026 |
| Bassy Invest AS | Real estate | 2018 |
| Bassøe Holding AS | Construction | 2005 |
| Bast Invest AS | Professional & scientific | 2015 |
| Basta AS | Information & communication | 2026 |
| Basta Bom AS | | 2018 |
| Bastant Solutions AS | Information & communication | 2025 |
| Bastante Textile AS | Wholesale & retail | 2021 |
| Bastard Burgers Norge AS | Hospitality | 2020 |
| Bastark AS | Professional & scientific | 2020 |
| Bastec AS | Real estate | 2013 |
| Bastia Investor AS | Real estate | 2005 |
| Bastia Marine Nuf | Transport & logistics | 2012 |
| Bastiansen Holding AS | | 2025 |