| Bibra AS | Real estate | 2020 |
| Bilbransjens Opplæringskontor AS | Education | 1990 |
| Bilforum AS | Wholesale & retail | 1972 |
| Bilpleieboden AS | Wholesale & retail | 2021 |
| Bioretur AS | Agriculture & fishing | 2017 |
| Bioretur Holding AS | Manufacturing | 2014 |
| Birkelundsbotn 14 AS | Construction | 2016 |
| Biscaia Transport AS | Transport & logistics | 2000 |
| Bith AS | Wholesale & retail | 1999 |
| BJ Håndverk AS | Construction | 2022 |
| BJB Maskin AS | Construction | 1995 |
| Bjerk Invest AS | Professional & scientific | 2005 |
| Bjorøy Eiendom AS | Real estate | 2017 |
| Bjotveit Maskin Og Transport AS | Construction | 2013 |
| Bjølle Holding AS | | 2025 |
| Bjørgvin Eiendomsmegling Vest AS | Real estate | 2006 |
| Bjørgvin Elektro AS | Construction | 1998 |
| Bjørkheim Apotek AS | Wholesale & retail | 2026 |
| Bjørn Christensen AS | Financial services | 2005 |
| Bjørnegaarden AS | Real estate | 1998 |
| Bjørnsons Gate 35 AS | Real estate | 2025 |
| Bjørnsons Gate 45 AS | Real estate | 2024 |
| Bjørnsonsgt. 36 AS | Real estate | 2007 |
| BKB Invest AS | Financial services | 2005 |
| Blaaker AS | Professional & scientific | 2020 |
| Black Nose West AS | Wholesale & retail | 2022 |
| Blombakkene Huseierlag SA | Other services | 2002 |
| Blomvågen AS | Real estate | 2016 |
| Blue Candle Trading AS | | 2022 |
| Blue Norseman Holding AS | Real estate | 2017 |
| Blåbær Production AS | Professional & scientific | 2015 |
| Blåbærfjellet AS | Professional & scientific | 2022 |
| BM72 Drift AS | Manufacturing | 2019 |
| BM72 Eiendom AS | Real estate | 1979 |
| BNP Invest AS | | 2026 |
| Bobby Tables AS | | 2021 |
| Body Care Hud Og Kroppspleiesalong Ans | Other services | 1992 |
| Body Tuning Holding AS | Health & social care | 2020 |
| Bofiber AS | Information & communication | 2009 |
| Boligstylisten AS | Professional & scientific | 2016 |
| Borsholm AS | Financial services | 2015 |
| Boso Holding AS | Wholesale & retail | 2020 |
| Bouncebackbirdie AS | Wholesale & retail | 2023 |
| Bradstorm Holding AS | Financial services | 2018 |
| Brakehaugen Holding AS | | 2022 |
| Brassets AS | Real estate | 2011 |
| Bratland Eiendom AS | Real estate | 2020 |
| Bratland Utvikling AS | Real estate | 2019 |
| Brattheng AS | Information & communication | 2012 |
| Broddik AS | | 2020 |
| Brosk AS | Other services | 2010 |
| Bråte Eiendom AS | Real estate | 2026 |
| Brødrene Myrseth AS | Administrative & support | 2016 |
| Bull Productions AS | Administrative & support | 2020 |
| Bull Øvrevik Holding AS | Financial services | 2013 |
| Byborg Eiendom AS | Real estate | 2006 |
| Bygg Og Snekkermester Birger Morstøl AS | Construction | 1990 |
| Bygg-Engros AS | Wholesale & retail | 2013 |
| Byggmester Andreas Nygaard AS | Construction | 2001 |
| Byggmester Atle Karlsen AS | Construction | 1995 |
| Byggmester Bafia AS | Construction | 2023 |
| Byggmester Jan Siglen AS | Construction | 2012 |
| Byggmester Kristian Bjørgo AS | Construction | 2020 |
| Byggmester Tormod Espelid AS | Construction | 1998 |
| Byggmester Wick AS | Construction | 2019 |
| Byggservice Greg AS | Construction | 2026 |
| Byhollund AS | Information & communication | 2019 |
| Baccadent A/S | Real estate | 1948 |
| Bølstad AS | Wholesale & retail | 2012 |
| Bølstad Eiendom AS | Wholesale & retail | 2015 |
| Bømlo Storsenter AS | Real estate | 2012 |
| Bømlo Storsenter Holding AS | | 2025 |
| Bønes Invest AS | Financial services | 2005 |
| Børhaug Invest AS | | 2022 |
| C Cappelen Smith AS | Wholesale & retail | 1970 |
| C Thømt Holding AS | | 2020 |
| C-Bulk KS | Transport & logistics | 2006 |
| C. Sortland Holding AS | Real estate | 2008 |
| C.Hopis AS | | 2021 |
| Caipirinha AS | Financial services | 2005 |
| Cake Invest AS | | 2020 |
| Camilla Cosmetics AS | Wholesale & retail | 2020 |
| Canuto Invest AS | Real estate | 2006 |
| Capacita AS | Real estate | 2005 |
| Carazon AS | Wholesale & retail | 2024 |
| Carcarebag AS | Professional & scientific | 2022 |
| Cassis AS | Real estate | 2003 |
| Cathrine Risan AS | Professional & scientific | 2022 |
| Cazador Invest AS | Real estate | 2004 |
| CDF Eiendom AS | Real estate | 2015 |
| Cemig Invest AS | Wholesale & retail | 2023 |
| Cev Fana AS | Wholesale & retail | 2008 |
| Cev Granvin AS | Wholesale & retail | 2008 |
| Cev Kråkenes AS | Real estate | 2008 |
| Cev Landås AS | Real estate | 2019 |
| Cev Nyborg AS | Real estate | 2008 |
| Cev Skulestadmo AS | Wholesale & retail | 2008 |
| Cev Sverresplass AS | Real estate | 2008 |
| Cev Ulvik AS | Wholesale & retail | 2008 |
| Cev Vadmyra AS | Wholesale & retail | 2008 |