| Blueblade Capital AS | | 2023 |
| Bluechip AS | Real estate | 2023 |
| Bluechip Asset 1 AS | Financial services | 2025 |
| Bluechip Asset 2 AS | Financial services | 2025 |
| Bluechip Asset 3 AS | Financial services | 2025 |
| Bluechip Asset 4 AS | Real estate | 2025 |
| Bluechip Asset 5 AS | Real estate | 2025 |
| Bluecorp AS | Professional & scientific | 2017 |
| Bluecrane AS | Administrative & support | 2012 |
| Bluefield AS | Real estate | 1992 |
| Bluefin AS | Professional & scientific | 2023 |
| Bluefront Capital I AS | Financial services | 2019 |
| Bluefront Capital II AS | Financial services | 2022 |
| Bluefront Equity AS | Financial services | 2020 |
| Bluefront I Topco AS | Professional & scientific | 2021 |
| Bluefront II Topco AS | Wholesale & retail | 2021 |
| Bluefront III Topco AS | Agriculture & fishing | 2021 |
| Bluefront Invest AS | Financial services | 2020 |
| Bluefront IV Topco AS | Construction | 2022 |
| Bluefront Ix Midco AS | | 2024 |
| Bluefront Ix Topco AS | | 2024 |
| Bluefront V Topco AS | Information & communication | 2022 |
| Bluefront Vi Topco AS | Information & communication | 2022 |
| Bluefront Vii Midco AS | Information & communication | 2024 |
| Bluefront Vii Topco AS | | 2024 |
| Bluefront Viii Topco AS | | 2024 |
| Bluefront X Topco AS | | 2025 |
| Bluefront Xi Midco AS | | 2025 |
| Bluefront Xi Topco AS | | 2025 |
| Bluefront Xii Topco AS | | 2026 |
| Bluefront Xiii Topco AS | | 2026 |
| Bluehelix AS | Information & communication | 2026 |
| Bluejeans Diplomacy AS | Administrative & support | 2015 |
| Blueline Studio AS | Professional & scientific | 2000 |
| Bluenord AS | Professional & scientific | 2015 |
| Bluenord ASA | Professional & scientific | 2005 |
| Bluepolar AS | | 2022 |
| Bluer AS | Professional & scientific | 2002 |
| Blueroom AS | Professional & scientific | 1998 |
| Bluesky Travel Tours Ans | Administrative & support | 1999 |
| Bluestar Europe Distribution B.V. Nuf | Wholesale & retail | 2015 |
| Bluestar Holding AS | Financial services | 2009 |
| Bluewater Advisory AS | Professional & scientific | 2018 |
| Bluewave Solar AS | Construction | 2023 |
| Bluexecutive AS | Administrative & support | 2009 |
| Blueyield AS | Energy | 2022 |
| Blueyield Rederi AS | Energy | 2021 |
| Bluezone Invest AS | | 2023 |
| Blugiallo AS | Wholesale & retail | 2025 |
| Blumandag AS | Administrative & support | 2019 |
| Blumar Supply Da | Wholesale & retail | 2026 |
| Blume AS | Information & communication | 2026 |
| Blume Holdco AS | | 2026 |
| Blumer Holding AS | Professional & scientific | 2021 |
| Blumer Lehmann AG | Construction | 2015 |
| Blunordic AS | Administrative & support | 2013 |
| Bluo Holding AS | Financial services | 2018 |
| Bluppblupp AS | Information & communication | 2025 |
| Blur Media AS | Information & communication | 2015 |
| Blush Yoga/Skin AS | Education | 2022 |
| Bluship AS | Transport & logistics | 2016 |
| Blusuvold Utvikling AS | Real estate | 2021 |
| Bluszko Holding AS | | 2024 |
| Bluware AS | Information & communication | 2006 |
| Blux Eiendom AS | Real estate | 2024 |
| Bly AS | Professional & scientific | 2012 |
| Blybakken AS | | 2005 |
| Blyberget Holding AS | | 2020 |
| Blydt Invest AS | | 2024 |
| Blystad AS | Transport & logistics | 2005 |
| Blystad Group AS | Transport & logistics | 2022 |
| Blystad Holding AS | Information & communication | 2017 |
| Blystad Invest AS | | 2025 |
| Blå Booking AS | Professional & scientific | 2006 |
| Blå Holding AS | Professional & scientific | 2013 |
| Blå Kors Arbeid Og Inkludering AS | Health & social care | 1970 |
| Blå Kors Arbeidskompetanse AS | Health & social care | 2021 |
| Blå Kors Behandling AS | Health & social care | 2009 |
| Blå Kors Divisjon Inkludering AS | | 2025 |
| Blå Kors Divisjon Opplæring AS | Education | 2023 |
| Blå Kors Eiendom AS | Real estate | 2000 |
| Blå Kors Eiendom Tjeldsund AS | Real estate | 2007 |
| Blå Kors Øst AS | Health & social care | 1996 |
| Blå Ledning AS | Construction | 2020 |
| Blåbærhaugen AS | Real estate | 2021 |
| Blåbærlyng AS | Financial services | 2018 |
| Blådalen 39 AS | Real estate | 2013 |
| Blåfall AS | Energy | 2014 |
| Blåfall Energi AS | Energy | 2023 |
| Blåfall Kraftverk AS | Energy | 2025 |
| Blåfall Vannkraft AS | Energy | 2025 |
| Blåfjell Bolig AS | Real estate | 2020 |
| Blåfunn AS | Professional & scientific | 2023 |
| Blågrønne Systemer AS | Professional & scientific | 2023 |
| Blåisen AS | Real estate | 1999 |
| Blåklockevägen 4 AS | Financial services | 2012 |
| Blålyng AS | Arts & recreation | 1984 |
| Blåne 7 AS | Real estate | 2018 |
| Blåne Eiendom Holding AS | | 2024 |
| Blånebba Ans | Real estate | 2000 |