| Bergem Eiendom AS | Real estate | 2021 |
| Bergen Legetjenester AS | Health & social care | 2020 |
| Bergen Sneakers AS | Wholesale & retail | 2005 |
| Bergin Invest AS | Other services | 2013 |
| Bernt Mjølhus AS | Construction | 2025 |
| Betongservice Haugesund AS | Construction | 2011 |
| Betterstore AS | | 2021 |
| BG Haugesund AS | Hospitality | 2016 |
| BGV AS | Real estate | 2008 |
| Bidila AS | Construction | 2024 |
| Bidr AS | Information & communication | 2017 |
| Biff & Burger AS | Hospitality | 2022 |
| Bifrost Og Draupne AS | Information & communication | 2014 |
| Bifrost Og Draupne Holding AS | Professional & scientific | 2016 |
| Bifrost Og Draupne Holding II AS | Professional & scientific | 2023 |
| Bigera AS | Construction | 2008 |
| Bigera Construction AS | Construction | 2025 |
| Bighouse AS | Professional & scientific | 2005 |
| Bil Service AS | Other services | 2006 |
| Bilbransjens Opplæringskontor Haugalandet AS | Education | 1996 |
| Bilbyen Bilpleie Haugesund AS | Other services | 2016 |
| Bilgruppen AS | Wholesale & retail | 2007 |
| Bilgruppen Bilutleie AS | Administrative & support | 2026 |
| Bilgruppen Fellestjenester AS | Other services | 2020 |
| Bilgruppen Mobilitet AS | Administrative & support | 2026 |
| Bilholding AS | Other services | 2020 |
| Bilholding II AS | Wholesale & retail | 2024 |
| Bilsenteret Haugesund AS | Wholesale & retail | 2016 |
| Bilutstyr AS | Wholesale & retail | 1987 |
| Bilutstyr Eiendom AS | Real estate | 1997 |
| Bilutstyr Prosjekt AS | | 1997 |
| Biografen Cafè AS | Hospitality | 2024 |
| Birger Aase Bilrekvisita AS | Other services | 1987 |
| Birkebeinergaten Eiendom AS | Real estate | 2015 |
| Birkeland & Håland Ans | Agriculture & fishing | 1995 |
| Birkeland & Strøm AS | Construction | 2026 |
| Birkis Group AS | | 2020 |
| Bit Division AS | Wholesale & retail | 2013 |
| BJ Kran & Transport AS | Construction | 2022 |
| Bjelland VVS AS | Construction | 2000 |
| Bjerkreim & Hansen AS | Construction | 2022 |
| Bjørk Investering AS | Real estate | 2005 |
| Bjørnnes Invest AS | | 2020 |
| Bjørnåsvegen a AS | Real estate | 2021 |
| Bjørnåsvegen C AS | Real estate | 2021 |
| Bjørnåsvegen D AS | Real estate | 2021 |
| Bjørnåsvegen E AS | Real estate | 2023 |
| Bk-Holdco AS | | 2026 |
| BKH Invest AS | Financial services | 2005 |
| BKR Carriers AS | Transport & logistics | 2005 |
| BKR Carriers KS | Transport & logistics | 2005 |
| BKR Tankers AS | Transport & logistics | 2005 |
| BKR Tankers KS | Transport & logistics | 2005 |
| Black Eiendom Utleie AS | Real estate | 2019 |
| Black Obsidian Holding AS | | 2026 |
| Blama AS | Wholesale & retail | 2004 |
| Bleikemyr Taxi AS | Transport & logistics | 2021 |
| Bleikemyrlogen Invest AS | Financial services | 2021 |
| Bleivik Eiendom AS | Real estate | 2001 |
| Bleivik Simulator Holding AS | Real estate | 2013 |
| Bli Rå AS | Education | 2015 |
| Blikkenslager Nesse & Karlsen AS | Construction | 1986 |
| Blix Lie AS | Other services | 2009 |
| Blå Kors Klinikk Haugaland AS | Health & social care | 2007 |
| BM Consulting AS | Administrative & support | 2013 |
| BMK Eiendom AS | Real estate | 2005 |
| Bo Arctic AS | Real estate | 2023 |
| Bocaj AS | Real estate | 1998 |
| Bogshamn & Johannessen Eiendom AS | Real estate | 2017 |
| Bogshamn Holding AS | Professional & scientific | 2005 |
| Bokmaker AS | Information & communication | 2008 |
| Bokn Industri AS | Real estate | 2023 |
| Bokn Nyholmen AS | Real estate | 2023 |
| Boligleie AS | Real estate | 2015 |
| Boma the Store AS | Wholesale & retail | 2025 |
| Boost Trening AS | Arts & recreation | 2024 |
| Borealisbrain AS | Administrative & support | 2025 |
| Borgen Hage AS | Real estate | 2017 |
| Borggata Futurum AS | Real estate | 2007 |
| Bos Agentur AS | Wholesale & retail | 2025 |
| Bos Retail Lørenskog AS | Wholesale & retail | 2023 |
| Bosun AS | Real estate | 2019 |
| Bovik Autoservice AS | Other services | 2025 |
| Bovik Eiendom AS | Real estate | 2008 |
| Brael AS | Information & communication | 2024 |
| Brah Invest AS | Manufacturing | 2022 |
| Brain Venture AS | Information & communication | 1993 |
| Brakahaug Natursteinsmuring Ans | Mining & quarrying | 1999 |
| Brakstad Consulting AS | Professional & scientific | 2022 |
| Brandli AS | Administrative & support | 2022 |
| Brannstasjonen Utvikling AS | Real estate | 2018 |
| BRATT1 AS | | 2025 |
| Brattcom AS | Construction | 2026 |
| Bratteteig Aktiv AS | Education | 2019 |
| Brave World AS | Health & social care | 2022 |
| Bravo Barnehagedrift AS | Education | 2003 |
| Bravo Eiendom AS | Real estate | 2004 |
| Bravo Holding AS | Education | 2001 |
| Bravo Marine AS | Professional & scientific | 2016 |
| Bredal AS | Agriculture & fishing | 2007 |