| Aurora Gruppen AS | Administrative & support | 2013 |
| Aurora Havnegata 21 AS | Real estate | 2013 |
| Autocenteret Eiendom AS | Real estate | 2019 |
| Autoforsyning AS | Wholesale & retail | 2014 |
| Autorent Narvik AS | Administrative & support | 2014 |
| Autospire AS | Wholesale & retail | 2016 |
| B36 Narvik AS | Real estate | 2018 |
| Bag Catering AS | Hospitality | 2014 |
| Banktrollet Barnehage SA | Education | 1988 |
| Barbros Trafikkskole AS | Education | 2015 |
| Barents Opplevelser AS | Real estate | 2019 |
| Barnas Verden Narvik AS | Wholesale & retail | 1999 |
| Barnehagen Victoriahavn AS | Education | 2009 |
| Barth Bygg AS | Construction | 2015 |
| Barth Trefelling AS | Agriculture & fishing | 2021 |
| Beg AS | Professional & scientific | 2025 |
| Begravelsesbyrået Lilja AS | Other services | 2008 |
| Beisfjordveien 39 AS | Real estate | 2019 |
| Beisfjordveien 92 AS | Administrative & support | 1991 |
| Beisfjordvn 40 AS | Real estate | 2012 |
| Bella Napoli Nord AS | Hospitality | 2021 |
| Bergesen Rør AS | Construction | 2021 |
| Bergh Eiendom Narvik AS | Real estate | 2007 |
| Bergh-Invest AS | Wholesale & retail | 2005 |
| Bergtagen AS | Administrative & support | 2022 |
| Bestevest AS | Real estate | 2021 |
| Betong & Anleggsgrossisten AS | Wholesale & retail | 2022 |
| BGH Invest AS | Wholesale & retail | 2005 |
| Big Bang AS | | 2006 |
| Bilskadesenteret Narvik AS | Other services | 2003 |
| Bizi AS | | 2019 |
| Bjerkvik Bygg AS | Construction | 1994 |
| Bjørg AS | Wholesale & retail | 1986 |
| Bjørkeveien Bolig AS | Real estate | 2026 |
| Blink Holding AS | | 2018 |
| Blombakk Eiendom AS | Real estate | 2026 |
| Bluemetrik AS | Manufacturing | 2025 |
| BN Eiendom Narvik AS | Real estate | 2025 |
| Bolagret AS | Real estate | 2014 |
| Bolandia AS | Real estate | 2022 |
| Boligbyggelagsgården AS | Real estate | 1995 |
| Boliginvest Narvik AS | Real estate | 2006 |
| Bompengeselskap Nord AS | Public administration | 2016 |
| Botic Holding AS | | 2025 |
| Botnmark Eiendom AS | Real estate | 2013 |
| BP3 Holding AS | | 2013 |
| BP3 Prosjekt AS | Professional & scientific | 2013 |
| BPN AS | Manufacturing | 2011 |
| BPS Nord - Bypakke Bodø AS | Public administration | 2006 |
| BPS Nord - Bypakke Harstad AS | Public administration | 2013 |
| BPS Nord - Bypakke Tenk Tromsø AS | Public administration | 2021 |
| BPS Nord - E10 Midtre Hålogaland AS | Transport & logistics | 2024 |
| BPS Nord - E6 Helgeland AS | Public administration | 2014 |
| BPS Nord - FV78 Toven AS | Public administration | 1999 |
| BPS Nord - Hålogalandsbrua AS | Public administration | 2001 |
| BPS Nord - Ryaforbindelsen AS | Public administration | 2020 |
| Branch Office II AS | Real estate | 1998 |
| Brannbakken 1 AS | Real estate | 2022 |
| Bravado International Group Limited | Wholesale & retail | 2012 |
| Breidablikk Gjestehus AS | Hospitality | 2005 |
| Brillehuset Optiker Egil Bergh AS | Wholesale & retail | 1980 |
| Brygga AS | Real estate | 1990 |
| Brygga II AS | Real estate | 2022 |
| Brygga Narvik AS | Real estate | 2024 |
| Brækken Holding AS | Construction | 2020 |
| Brødr Berg Elektro AS | Financial services | 2005 |
| Bsi Holding AS | | 2012 |
| BT2 Eiendom AS | Real estate | 2010 |
| Burger'N AS | Hospitality | 2014 |
| Buss & Vogntogskolen AS | Education | 2013 |
| Busstransport AS | Transport & logistics | 2013 |
| Butikken Café AS | Hospitality | 2019 |
| By Beto AS | Health & social care | 2022 |
| BY1 Bilpleie AS | Other services | 2015 |
| BY1 Bilservice AS | Other services | 2019 |
| Byens AS | Education | 2024 |
| Bygg Og Vaktmesterservice AS | Construction | 2006 |
| Byggmester Liljebakk AS | Construction | 2006 |
| Byggtjenester Narvik AS | Construction | 2012 |
| Byheisen Narvik AS | Professional & scientific | 2020 |
| Børseth Invest AS | Health & social care | 2016 |
| Børøya Eiendom AS | Construction | 2019 |
| C. Majbäck AS | Wholesale & retail | 2009 |
| Caesum AS | | 2019 |
| Calor Frigidus AS | | 2020 |
| Cani Drift AS | Wholesale & retail | 2019 |
| Cani Holding AS | Wholesale & retail | 2019 |
| Caro Holding AS | | 2018 |
| Cashcow Invest AS | Real estate | 2005 |
| Catek AS | Manufacturing | 2024 |
| Cdesign AS | Professional & scientific | 2018 |
| Centrum - Tannklinikk AS | Health & social care | 2005 |
| Chic Klippotek AS | Other services | 2007 |
| China - Restaurant AS | Hospitality | 1989 |
| Chirita Betongrehabilitering AS | Construction | 2008 |
| CHR Føre Eiendommer AS | Real estate | 2001 |
| Cmtb Holding AS | | 2022 |
| Collin AS | Financial services | 2007 |
| Computacenter UK Limited | Information & communication | 2011 |
| Concil AS | Professional & scientific | 2018 |