| Bolo Holding AS | | 2023 |
| Bomax Prosjekt AS | Wholesale & retail | 2026 |
| Bompibjørn AS | | 2021 |
| Bondhus Invest AS | | 2025 |
| Boonya Holding AS | | 2023 |
| Boost AI AS | Information & communication | 2016 |
| Boost Athlete AS | Wholesale & retail | 2020 |
| Borgeskogen 36 AS | Real estate | 1995 |
| Borgeskogen Logistikkbygg AS | Real estate | 2022 |
| Borris AS | Professional & scientific | 2023 |
| Borsheim Agri AS | Wholesale & retail | 2017 |
| Borsheim Eiendom AS | Real estate | 1996 |
| Boservice AS | Administrative & support | 2012 |
| Bosko Distribution AS | Transport & logistics | 2023 |
| Bosse Holding AS | Real estate | 2006 |
| Botne Holding AS | Real estate | 2023 |
| Bovita Langgata AS | Real estate | 2018 |
| Box Property AS | Real estate | 2018 |
| Boxa Invest AS | | 2025 |
| Boxt Da | Wholesale & retail | 2003 |
| Boz Empire AS | Other services | 2025 |
| BP Holding AS | Professional & scientific | 2006 |
| BR Finans AS | | 2025 |
| Braai AS | Hospitality | 2021 |
| Braasten Sko AS | Wholesale & retail | 1983 |
| Brage Eiendom AS | Real estate | 2017 |
| Brains AS | | 2020 |
| Brakestad Holding AS | | 2020 |
| Brakkvann AS | | 2025 |
| Brakky AS | | 2023 |
| Bralla AS | Wholesale & retail | 2026 |
| Brannstasjonsveien 12 AS | Real estate | 1974 |
| Brannstasjonsveien 8 AS | Real estate | 2001 |
| Brannstasjonsveien Holding AS | Real estate | 2024 |
| Brannstasjonveien 10 AS | Real estate | 2020 |
| Brattebø Invest AS | Real estate | 2024 |
| Bratthetland Myrland Samdrift Da | Agriculture & fishing | 2002 |
| Braut Egeli Holding AS | | 2024 |
| Braut Klepsland Mauland Og Sæther Eiendomsselskap AS | Real estate | 2000 |
| Breedsense AS | Professional & scientific | 2019 |
| Breidablikk Investering AS | Real estate | 2015 |
| Breigata 18 AS | Real estate | 2018 |
| Breigaten 19 AS | Real estate | 2006 |
| Breilito Invest AS | Real estate | 2012 |
| Breivik Øst Va SA | Water & waste | 2019 |
| Bri Eiendom Sørvest AS | Wholesale & retail | 2007 |
| Bri Oil & Gas Startup AS | | 2021 |
| Brim AS | Professional & scientific | 2017 |
| Bringpro Transport AS | Transport & logistics | 2025 |
| Briotec AS | Real estate | 2007 |
| Brl-Invest AS | Financial services | 2006 |
| Broek Invest AS | | 2021 |
| Brolin Holding AS | Real estate | 2017 |
| Broom Bil AS | Wholesale & retail | 2016 |
| Broom Eiendom AS | Real estate | 2016 |
| Brow Rebelle AS | Health & social care | 2017 |
| BRS Sandnes AS | Wholesale & retail | 1995 |
| Brueland Holding AS | | 2015 |
| Bruelandsbyen AS | Real estate | 2016 |
| Bruenlive AS | Information & communication | 2025 |
| Bruhammaren AS | Construction | 2011 |
| Brunes Holding AS | | 2022 |
| Bruvikhagen AS | Real estate | 2011 |
| BRX Invest AS | Real estate | 2022 |
| Brygge Bakeren Hove AS | Hospitality | 2024 |
| Bryggå AS | | 2023 |
| Bryne Hagen AS | Real estate | 1986 |
| Bryne Retail Arena AS | Real estate | 2012 |
| Bråstein Geoconsult AS | Professional & scientific | 2022 |
| Bråtveit Entreprenør AS | Construction | 2017 |
| Brødrene Aase AS | Manufacturing | 2012 |
| Brødrene Gulbrandsen Eiendom AS | Real estate | 2000 |
| Brødrene Hegre | Administrative & support | 1995 |
| Brødrene Hest Invest AS | Financial services | 2021 |
| Brødrene Lie AS | Construction | 1977 |
| Brødrene Malik Da | Hospitality | 2000 |
| Brødrene Myhre Murerfirma Da | Construction | 2005 |
| BS Eiendom Sandnes AS | Real estate | 2007 |
| Bshh Eiendom AS | Real estate | 2006 |
| Bshh Eiendom Bryne AS | Real estate | 1965 |
| Bshh Eiendom Stavanger AS | Real estate | 2010 |
| Bts-Consulting AS | Professional & scientific | 2010 |
| Buen Fritidsbygg AS | Construction | 2004 |
| Buestad Gård AS | Real estate | 2018 |
| Bufre Holding AS | Wholesale & retail | 2016 |
| Bufre Trading AS | | 2023 |
| Buggeland Barnehage SA | Education | 2004 |
| Buhr AS | Professional & scientific | 2016 |
| Buitran AS | Hospitality | 2023 |
| Bulkedoktoren AS | Other services | 2020 |
| Bunadhjørnet AS | Wholesale & retail | 1994 |
| Bunadhjørnet Holding AS | Wholesale & retail | 2016 |
| Burger & Pizzacompaniet AS | Hospitality | 2005 |
| Burger Hana AS | Hospitality | 2022 |
| Burger Møllekvartalet AS | Hospitality | 2023 |
| Burgrilla AS | Hospitality | 2024 |
| Burgundy Life AS | Administrative & support | 2024 |
| Burre Invest AS | Financial services | 2013 |
| Buset Invest AS | Administrative & support | 2010 |
| Business Air Service AS | Transport & logistics | 1999 |