| BTK Holdings AS | Information & communication | 2020 |
| BTS Shipping AS | Transport & logistics | 2015 |
| Buddha Imports Ans | Wholesale & retail | 2003 |
| Buffalo Steakhouse Bodø Ans | Hospitality | 1997 |
| Buholmen Båt AS | Wholesale & retail | 2005 |
| Bunad-Tilbehør AS | Wholesale & retail | 2025 |
| Burk AS | Real estate | 2023 |
| Burøyveien 12 AS | Real estate | 2008 |
| Burøyveien 13 AS | Real estate | 2018 |
| Burøyveien 20 AS | Real estate | 2022 |
| Burøyveien 24 AS | Real estate | 2022 |
| Busch Holding AS | Real estate | 2014 |
| Busch Industribygg Bodøsjøveien AS | Real estate | 2014 |
| Busch-Sørensen Rengjøringsbyrå AS | Administrative & support | 1985 |
| Buvik AS | Professional & scientific | 2022 |
| Buvik M&Pd AS | Professional & scientific | 2021 |
| BVJ Holding AS | Real estate | 2015 |
| BWH Invest AS | | 2024 |
| By North AS | Professional & scientific | 2013 |
| By North Drift AS | Professional & scientific | 2022 |
| Bygdeberget Trysil AS | Real estate | 2025 |
| Byggalf AS | Construction | 2001 |
| Byggalf Eiendom AS | Real estate | 2005 |
| Byggblikk AS | Construction | 2024 |
| Byggcon AS | Real estate | 2018 |
| Byggcon Nord AS | Real estate | 2018 |
| Byggholm AS | Real estate | 2005 |
| Byggjak AS | Real estate | 2020 |
| Byggmester Bjørn Dypvik AS | Professional & scientific | 2018 |
| Byggmester Erling Skipnes AS | Construction | 1996 |
| Byggmester Erling Stemland AS | Construction | 2012 |
| Byggmester Fritzøe AS | Construction | 2002 |
| Byggmester Helgesen AS | Construction | 2012 |
| Byggmester Kjell Pettersen AS | Construction | 1989 |
| Byggmester Nydal AS | Construction | 2023 |
| Byggmester Olaisen AS | Construction | 2022 |
| Byggmester V Lillegaard AS | Construction | 1995 |
| Byggmester Villy Bård Solvoll AS | Construction | 1999 |
| Byggmesteren Bodø AS | Construction | 2022 |
| Byggnord Anlegg AS | Construction | 2014 |
| Byggnord Eiendom AS | Real estate | 2011 |
| Byggpartner AS | Construction | 1992 |
| Byggpartner Eiendom AS | Real estate | 2022 |
| Byggpartner Kontor AS | Real estate | 2022 |
| Byggproffen Bodø AS | Construction | 2019 |
| Byggproffen Holding AS | Construction | 2018 |
| Byggsøk Norge AS | Professional & scientific | 2014 |
| Byond AS | Professional & scientific | 2020 |
| Byporten Bodø AS | Real estate | 2019 |
| Beko industriverksted A/S | Manufacturing | 1987 |
| Boarch Arkitekter AS | Professional & scientific | 1986 |
| Bådin AS | Manufacturing | 2012 |
| Bård Hansen Invest AS | | 2020 |
| Bård Kurotek Service AS | Other services | 2016 |
| Båt & Motorservice AS | Manufacturing | 2023 |
| Bøe Blikk AS | Construction | 2020 |
| Bøe Ovesen Holding AS | | 2023 |
| Bøff AS | Real estate | 2021 |
| Bønna Invest AS | Real estate | 2005 |
| Bønner I Byen AS | Manufacturing | 2013 |
| Børtind Eiendom AS | | 2021 |
| Børtind Invest AS | Real estate | 2012 |
| Børtinden Panorama AS | Real estate | 2013 |
| Børvasstindan AS | Real estate | 2021 |
| Bøtter Og Spann AS | Administrative & support | 2014 |
| C&M Invest AS | Real estate | 2014 |
| C.Nilsen Holding AS | | 2021 |
| C/S-Holding AS | | 2026 |
| Caiamd AS | Information & communication | 2024 |
| Calanus Eiendom AS | Real estate | 2018 |
| Campia Aspmyra AS | Wholesale & retail | 2015 |
| Campus Nord AS | Education | 2006 |
| Capella Holding AS | Other services | 2016 |
| Capipro AS | Manufacturing | 2024 |
| Caranord AS | Wholesale & retail | 1992 |
| Caravan & Utleie Ans | | 1989 |
| Carbon Reduction Technologies AS | Professional & scientific | 2008 |
| Cardigan Eiendom AS | Real estate | 2014 |
| Carino AS | Real estate | 2001 |
| Casa Consult AS | Professional & scientific | 2017 |
| Casa Nord AS | Real estate | 2006 |
| Catch Nord AS | Administrative & support | 2019 |
| Cathay Trading AS | Wholesale & retail | 2019 |
| Cato Jensen AS | Real estate | 2010 |
| CBD Holding AS | Financial services | 2018 |
| CCG Corporation AS | Real estate | 2006 |
| CCJ Invest AS | Real estate | 2018 |
| CCM Holding AS | Financial services | 2005 |
| Cecilie Strand AS | Health & social care | 2006 |
| Cekol Holding AS | Real estate | 2019 |
| Central Atrium AS | Real estate | 2009 |
| Centrum Bil & Karosseri AS | Other services | 1991 |
| Ces I AS | Health & social care | 2023 |
| CG Drift AS | Administrative & support | 2007 |
| CG Drift Invest AS | Real estate | 2013 |
| Chablis AS | | 2024 |
| Chargeup AS | Professional & scientific | 2011 |
| Chaz Invest AS | Professional & scientific | 2022 |
| Cherokee AS | Real estate | 2025 |
| CHH AS | Hospitality | 2025 |