| Bloom & Brew AS | Hospitality | 2024 |
| Bloom Capital AS | | 2026 |
| Bloom Consulting AS | Information & communication | 2024 |
| Bloom Holding AS | | 2024 |
| Bloom Investments AS | | 2022 |
| Bloom Oslo AS | Professional & scientific | 2010 |
| Bloom Solutions AS | Information & communication | 2025 |
| Bloomberg L P Norway Branch Norsk Avdeling Av Utenlandsk Foretak Nuf | Information & communication | 2001 |
| Bloomfield AS | Professional & scientific | 2020 |
| Bloomi Lindland AS | Wholesale & retail | 2024 |
| Blooming AS | Wholesale & retail | 2008 |
| Blooming Garden AS | | 2018 |
| Bloomingu AS | Education | 2016 |
| Blooms SA | Professional & scientific | 2021 |
| Bloomsboutique Da | Wholesale & retail | 2024 |
| Bloor Research Scandinavia AS | Information & communication | 1991 |
| Blowfish AS | Professional & scientific | 2022 |
| BLS AI AS | Health & social care | 2024 |
| BLS Holding AS | Financial services | 2006 |
| BLS Services AS | Administrative & support | 2025 |
| BLT Invest AS | Professional & scientific | 2016 |
| BLT Salonger AS | Hospitality | 2018 |
| Blu Holding Nuf | Wholesale & retail | 2016 |
| Blu Perspective Management AS | Professional & scientific | 2021 |
| Blu Renhold AS | Administrative & support | 2021 |
| Blu Retail Group AS | Wholesale & retail | 2017 |
| Blue Aerospace AS | Wholesale & retail | 2013 |
| Blue Bag Studio AS | Information & communication | 2025 |
| Blue Bay Club AS | Professional & scientific | 2007 |
| Blue Bean Investment AS | | 2015 |
| Blue Bichon AS | Information & communication | 2024 |
| Blue Bidco AS | Real estate | 2025 |
| Blue Cargo AS | Transport & logistics | 1996 |
| Blue Charm AS | Professional & scientific | 2016 |
| Blue Coast Property AS | Real estate | 2015 |
| Blue Crane Invest AS | Financial services | 2015 |
| Blue Earth AS | | 2020 |
| Blue Elephant Restaurant AS | Hospitality | 2013 |
| Blue Energy AS | Wholesale & retail | 1991 |
| Blue Energy Holding AS | Wholesale & retail | 2015 |
| Blue Escape AS | Administrative & support | 2024 |
| Blue FJD AS | | 2025 |
| Blue Flame Stoves AS | Wholesale & retail | 2019 |
| Blue Future Holding AS | Professional & scientific | 2008 |
| Blue Future Services AS | Real estate | 2021 |
| Blue Group AS | Administrative & support | 2021 |
| Blue Helix Health AS | Professional & scientific | 2017 |
| Blue Horizon Invest AS | | 2021 |
| Blue Horseshoe Capital AS | | 2022 |
| Blue Horseshoe Holding AS | Financial services | 2009 |
| Blue Label Properties AS | | 2016 |
| Blue Lady AS | Financial services | 1992 |
| Blue Logistics Air & Ocean Norway AS | Transport & logistics | 2025 |
| Blue Logistics Road Norway AS | Transport & logistics | 2025 |
| Blue Monday AS | Other services | 2014 |
| Blue Monday Holding AS | Professional & scientific | 2020 |
| Blue Moon Holding AS | | 2024 |
| Blue Mountain Capital AS | Financial services | 2016 |
| Blue Mountain Company AS | Wholesale & retail | 2012 |
| Blue Note AS | | 2026 |
| Blue Oar Management AS | | 2025 |
| Blue Ocean Disruptive Tech AS | Financial services | 2015 |
| Blue Ocean Holding AS | | 2021 |
| Blue Ocean LNG AS | | 2026 |
| Blue Ocean Marine Invest AS | Real estate | 2013 |
| Blue Oyster Holding AS | | 2025 |
| Blue Productions AS | Information & communication | 2012 |
| Blue Property AS | Real estate | 2018 |
| Blue Property Asker AS | Real estate | 2026 |
| Blue Property Holding AS | Real estate | 2020 |
| Blue Property Høvik AS | Real estate | 2026 |
| Blue Property Larvik AS | Real estate | 1987 |
| Blue River Invest AS | Financial services | 2005 |
| Blue Rock AS | Financial services | 2017 |
| Blue Sky AS | Real estate | 1999 |
| Blue Sky Holding AS | | 2009 |
| Blue Space AS | | 2021 |
| Blue Spark AS | Information & communication | 2017 |
| Blue Star Consultancy AS | Professional & scientific | 2024 |
| Blue Steel Dry Bulk AS | Transport & logistics | 2021 |
| Blue Tern AS | Construction | 2019 |
| Blue Tern Holding AS | Construction | 2019 |
| Blue Tern Operations AS | Construction | 2019 |
| Blue Topco AS | Real estate | 2025 |
| Blue Trumpet Productions AS | Information & communication | 2021 |
| Blue Turtle AS | | 2019 |
| Blue Wash AS | Other services | 2021 |
| Blue Water Shipping AS | Transport & logistics | 2008 |
| Blue Water Shipping Sea & Air Norway AS | Transport & logistics | 2026 |
| Blue-C AS | Professional & scientific | 2010 |
| Blueberry Builders AS | Construction | 2022 |
| Blueberry Capital AS | Financial services | 2010 |
| Blueberry Consult AS | Professional & scientific | 2022 |
| Blueberry Group AS | Wholesale & retail | 2004 |
| Blueberry Hill AS | | 2024 |
| Blueberry Management AS | Financial services | 2018 |
| Blueberry Venture AS | | 2019 |
| Bluebird Group AS | Professional & scientific | 2023 |
| Bluebird Invest AS | Financial services | 2005 |
| Bluebird Investments AS | | 2012 |