| Bashara Renovering AS | Construction | 2023 |
| Basista Holding AS | Real estate | 2022 |
| Baugr AS | | 2025 |
| Bauta Betong AS | Construction | 2023 |
| BB Gym Bodø AS | Education | 2012 |
| Bb-Eiendom Salten AS | Real estate | 2020 |
| BBB AS | Construction | 2021 |
| BBJ Invest AS | Hospitality | 2015 |
| Bcom AS | Professional & scientific | 2021 |
| Be Belysning AS | Wholesale & retail | 2025 |
| Be Kraftsalg AS | Energy | 2007 |
| Be Varme AS | Energy | 2005 |
| Bea Eiendomsutvikling AS | Professional & scientific | 2025 |
| Beauty Tan Nord AS | Other services | 2024 |
| Beauty Tan Tiurveien AS | Other services | 2024 |
| Bech Frisør AS | Other services | 2014 |
| Bech Larsen Invest AS | | 2026 |
| Beckmeister AS | Wholesale & retail | 2009 |
| Beddingen AS | Arts & recreation | 2023 |
| Bedre Fysisk Helse AS | Health & social care | 2024 |
| Bedrift Norge AS | Professional & scientific | 2017 |
| Bedriftsdata Ans | Wholesale & retail | 2003 |
| Bedriftsinvest AS | Hospitality | 1996 |
| Bedriftskompetanse AS | Professional & scientific | 1989 |
| Bedriftsomega AS | Real estate | 2012 |
| Bedriftsråd Bodø AS | Professional & scientific | 2005 |
| Behner AS | Professional & scientific | 2016 |
| Beiermann Bygg AS | Construction | 2025 |
| Bendiks AS | Financial services | 2005 |
| Benham AS | Real estate | 2008 |
| Benjamin Peter Trafikkskole AS | Education | 2022 |
| Benjaminsen Holding AS | Wholesale & retail | 2016 |
| Benoni Bygg AS | Construction | 2021 |
| Benonisen Antirust AS | Other services | 2024 |
| Berg-Jensen Invest 2 AS | Real estate | 2024 |
| Bergs Begravelsesbyrå AS | Other services | 2008 |
| Berild AS | Financial services | 2005 |
| Berild Helse AS | Health & social care | 2017 |
| Berit E. Holding AS | | 2024 |
| Bernhardsen Consulting AS | Professional & scientific | 2021 |
| Bernhardsen Holding AS | | 2020 |
| Bernhaug Invest AS | Real estate | 2005 |
| Bernt Haugmo AS | Construction | 2012 |
| Bertnes Bygg AS | Construction | 2026 |
| Bertnes Eiendomsutvikling AS | Real estate | 2022 |
| Bertnes Lager AS | Real estate | 2024 |
| Betongarbeid Og Transport AS | Construction | 2007 |
| Betongpro AS | Construction | 2025 |
| Beyond 66 AS | Administrative & support | 2026 |
| Bhaug Invest AS | | 2025 |
| BHD AS | | 2021 |
| BHK Idrettshall AS | Real estate | 2023 |
| BHT Invest AS | | 2009 |
| Bi & Bo AS | Real estate | 1986 |
| Bie Eiendom AS | Hospitality | 2023 |
| Big Picture Bodø AS | Professional & scientific | 2020 |
| Biglo Invest AS | Real estate | 2020 |
| Bil & Transmisjon AS | Other services | 2011 |
| Bilberging Hamarøy AS | Transport & logistics | 2018 |
| Bilkongen AS | Wholesale & retail | 2025 |
| Billigsol Norge AS | Other services | 2014 |
| Binn AS | Manufacturing | 2022 |
| Biostar AS | Transport & logistics | 2003 |
| Biotank Shipping AS | Transport & logistics | 2005 |
| Biovivo Holding AS | | 2018 |
| Biovivotech AS | Professional & scientific | 2009 |
| Birger JR AS | Agriculture & fishing | 2021 |
| Biro Holding AS | Agriculture & fishing | 2021 |
| Bjarmann-Simonsen AS | Professional & scientific | 2023 |
| Bjarne Eide Holding AS | Construction | 2005 |
| Bjarnesen AS | | 2021 |
| Bjellånes Invest AS | Financial services | 2007 |
| Bjerka Næringspark AS | Real estate | 2009 |
| Bjerkeng Blomster AS | Wholesale & retail | 2013 |
| Bjerkis AS | Wholesale & retail | 2020 |
| Bjørkan Holding AS | | 2022 |
| Bjørnhollo 51-53 AS | Real estate | 2023 |
| Black Garlic Design AS | Manufacturing | 2022 |
| Blekastad AS | | 2021 |
| Blikk Nord AS | Construction | 2023 |
| Bliksvær Vannverk SA | Water & waste | 1963 |
| Blixtind Invest AS | Real estate | 2021 |
| Blom Bløggers AS | Agriculture & fishing | 2020 |
| Blomsterpian AS | Wholesale & retail | 2010 |
| Blomsø Invest AS | | 2012 |
| Blue Aqua Scales AS | Wholesale & retail | 2026 |
| Blue Shark AS | | 2024 |
| Blush Beauty AS | Other services | 2024 |
| Blush Holding AS | Other services | 2024 |
| Blushstudio AS | Other services | 2017 |
| Blåbyen Eiendom AS | | 2007 |
| BMK Holding AS | Construction | 2018 |
| BND Bygg Nuf | Construction | 2022 |
| BNG Holding AS | | 2023 |
| BO3 Holding AS | Real estate | 2016 |
| Boaas Eiendomsutvikling AS | Professional & scientific | 1988 |
| Boarch Eiendom AS | Real estate | 2003 |
| Bocon Holding AS | Professional & scientific | 2005 |
| Bodin Allservice AS | Administrative & support | 2026 |
| Bodin Byggservice AS | Construction | 2020 |