| BRN Best Retail Norge AS | Wholesale & retail | 2003 |
| Bro Eiendomsrådgivning AS | Professional & scientific | 2026 |
| Broddway Holding AS | Financial services | 2017 |
| Brokelandsheia Øst 1 AS | Real estate | 2014 |
| Brokelandsheia Øst 3 AS | Real estate | 2014 |
| Brokkr Consulting AS | Professional & scientific | 2022 |
| Broks Tea Co AS | Wholesale & retail | 2023 |
| Broli Dagligvare AS | Wholesale & retail | 2026 |
| Broly AS | Financial services | 1996 |
| Bromstadenga Parkeringsutleie AS | Real estate | 2013 |
| Bromstadtrekanten Eiendom AS | Real estate | 2023 |
| Bromstadvegen 59 AS | Real estate | 2016 |
| Bromstadveien 57 AS | Real estate | 2001 |
| Brooklyn Diner AS | Hospitality | 2018 |
| Bror Solsiden AS | Hospitality | 2004 |
| Brorbar AS | Hospitality | 2002 |
| Broren Min AS | Construction | 2023 |
| Brosec AS | Professional & scientific | 2019 |
| Brozen AS | | 2022 |
| BRP Norway AS | Wholesale & retail | 1995 |
| BRS Holding AS | Wholesale & retail | 2005 |
| BRS Invest AS | Financial services | 2011 |
| Bruborg Holding AS | Real estate | 2001 |
| Brugata Eiendom AS | Real estate | 1990 |
| Bruheim Blikkconsult AS | Real estate | 2005 |
| Bruholmen AS | Real estate | 2016 |
| Brukerflate AS | Information & communication | 2026 |
| Brukon AS | Professional & scientific | 2014 |
| Bruktbilgruppen AS | Administrative & support | 2010 |
| Brun Bolig Invest AS | Real estate | 2017 |
| Brun Fevang AS | | 2026 |
| Brun Kapital II AS | Real estate | 2016 |
| Brunost Holding AS | Financial services | 2012 |
| Brunvoll Butikkdrift AS | Wholesale & retail | 2025 |
| Brurok Holding AS | | 2020 |
| Brurskanken Holding AS | Financial services | 2015 |
| Bruåsen Eiendom AS | Real estate | 2023 |
| BRV 22 AS | Real estate | 2020 |
| Brygga Studio AS | Information & communication | 2020 |
| Bryggen Eiendom Tromsø AS | Real estate | 2001 |
| Bryggeriet Pub Og Kjøkken AS | Hospitality | 2016 |
| Bryllupshjelperen AS | Information & communication | 2023 |
| Bryn Morgan Holding AS | | 2025 |
| Bryns Vei 2 AS | Real estate | 2023 |
| Bryte AS | Manufacturing | 2020 |
| Brækkækkel AS | Information & communication | 2025 |
| Brænnebukta Båt- Og Naustlag SA | Arts & recreation | 2003 |
| Brød&Sånt Buran AS | Manufacturing | 2026 |
| Brødrene Berge Ans | Construction | 1999 |
| Brødrene Dahle AS | Agriculture & fishing | 2016 |
| Brødrene Dragsten Da | Agriculture & fishing | 2005 |
| Brødreskift AS | Wholesale & retail | 2021 |
| Brøl AS | | 2022 |
| Brøset BS5 AS | Real estate | 2022 |
| Brøset Eiendom AS | | 2024 |
| Brøsettoppen Eiendom AS | Real estate | 2024 |
| Brøsetvegen 186 AS | Real estate | 2018 |
| Brøsetvegen Utbygging AS | Real estate | 2026 |
| Brøttemsveien 105 Eiendom AS | Real estate | 2010 |
| BSG4 Utvikling AS | Real estate | 2022 |
| Bsi AS | Financial services | 2011 |
| BSM Invest AS | | 2025 |
| BSS Forenede Invest AS | Financial services | 2005 |
| BTB Holding AS | Wholesale & retail | 2002 |
| Buddhas Hage Shop AS | Wholesale & retail | 2026 |
| Budtjenester AS | Transport & logistics | 2023 |
| Buengvegen AS | Wholesale & retail | 2016 |
| Buerie Gon Buorre Og Bra Friluftsbarnehage SA | Education | 2026 |
| Bugatti Drive Thru AS | Hospitality | 2007 |
| Bugatti Holding AS | Real estate | 2007 |
| Bugge AS | Construction | 1967 |
| Bugs AS | Financial services | 2011 |
| Builtly Engineering AS | Information & communication | 2026 |
| Bukkvollan AS | Real estate | 2025 |
| Bula AS | Hospitality | 2016 |
| Bulbitech AS | Health & social care | 2005 |
| Bulder Invest AS | Real estate | 2006 |
| Bulle Horizon AS | | 2021 |
| Bumblebee Holding AS | Financial services | 2017 |
| Bunker 18 AS | Real estate | 2010 |
| Bunnpris & Gourmet Nyborg AS | Wholesale & retail | 1964 |
| Bunnpris & Gourmet Tyholt AS | Wholesale & retail | 1979 |
| Bunnpris Angelltrøa AS | Wholesale & retail | 1969 |
| Bunnpris Bakkegata AS | Wholesale & retail | 1998 |
| Bunnpris Elgeseter AS | Wholesale & retail | 1994 |
| Bunnpris Havstad AS | Wholesale & retail | 1929 |
| Bunnpris Ila AS | Wholesale & retail | 2001 |
| Bunnpris Lerkendal AS | Wholesale & retail | 1986 |
| Bunnpris Leüthen AS | Wholesale & retail | 2005 |
| Bunnpris Lykkegården AS | Wholesale & retail | 1995 |
| Bunnpris Moholt AS | Wholesale & retail | 1964 |
| Bunnpris Nidarvoll AS | Wholesale & retail | 1986 |
| Bunnpris Olav Tryggvason AS | Wholesale & retail | 2025 |
| Bunnpris Prinsen AS | Wholesale & retail | 1996 |
| Bunnpris Romolslia AS | Wholesale & retail | 1973 |
| Bunnpris Rosendal AS | Wholesale & retail | 2014 |
| Bunnpris Rydningen AS | Wholesale & retail | 2003 |
| Bunnpris Samfundet AS | Wholesale & retail | 1998 |
| Bunnpris Stubban AS | Wholesale & retail | 1964 |
| Bunnpris Trondheim S AS | Wholesale & retail | 2025 |