| Biss College AS | Education | 2020 |
| Biss Preschool AS | Education | 2022 |
| Biss Sentrum AS | Education | 2017 |
| Bitbyte AS | Information & communication | 2016 |
| Bitcoins Norge AS | Information & communication | 2012 |
| Bitpile AS | | 2020 |
| Biuro AS | Professional & scientific | 2020 |
| Biv AS | Wholesale & retail | 2017 |
| Biyun Holding AS | Financial services | 2017 |
| Biå Steinerbarnehage AS | Education | 2015 |
| BJ Consult AS | Professional & scientific | 2010 |
| BJ Og BBJ Holding AS | | 2026 |
| BJ Petroleum Services Ltd. C/O Advokatfimaet Price | | 1997 |
| BJ Services Company UK Ltd | | 1998 |
| Bjaanes Invest AS | | 2014 |
| Bjeff Holding AS | | 2022 |
| Bjella Holding AS | Real estate | 2005 |
| Bjella Investments AS | Real estate | 2005 |
| Bjelland Automatic AS | Construction | 2026 |
| Bjelland Automatic AS | Construction | 2013 |
| Bjellesau AS | Real estate | 2020 |
| Bjergsted Invest AS | Construction | 2017 |
| Bjergsted Investering AS | Real estate | 2015 |
| Bjergsted Klinikken AS | Health & social care | 2006 |
| Bjergsted Terrasse 1 AS | Real estate | 2018 |
| Bjerkeland & Lunde Ans | | 1994 |
| BJJ Supply AS | Wholesale & retail | 2026 |
| Bjogsor Holding AS | | 2023 |
| Bjolne AS | | 2021 |
| Bjorhaugslettå 22 AS | Real estate | 2007 |
| Bjødnabeen 10 Eiendom AS | Real estate | 2014 |
| Bjødnabeen AS | Real estate | 1977 |
| Bjørg Tengesdal Holding AS | Financial services | 2008 |
| Bjørn & Kjell Eiendom AS | Real estate | 1989 |
| Bjørn Jarle AS | Wholesale & retail | 1985 |
| Bjørn Lunde Consulting AS | Professional & scientific | 2003 |
| Bjørn Mentzoni Dahl AS | Real estate | 2005 |
| Bjørn Thorsen Invest AS | Financial services | 2014 |
| Bjørnstadgata 7 AS | Real estate | 2006 |
| Bjørnø Holding AS | | 2025 |
| Bjørnøygaten AS | Real estate | 2005 |
| BL Invest AS | Real estate | 2006 |
| BL Investering AS | | 2024 |
| Blaane Invest AS | | 2005 |
| Blaasenborg Invest AS | Real estate | 2003 |
| Black Gold Solutions AS | Wholesale & retail | 2014 |
| Black Phenix AS | Administrative & support | 2016 |
| Black Rhino Music AS | Information & communication | 2015 |
| Blackoro AS | Professional & scientific | 2013 |
| Bladeship AS | Professional & scientific | 2026 |
| Bladet Norsk Kirkemusikk Da | Information & communication | 2022 |
| Blanchard Norway AS | Professional & scientific | 1995 |
| Blidensol Energy AS | Professional & scientific | 2008 |
| Blikk Teknikk AS | Manufacturing | 2002 |
| Blikraper AS | Professional & scientific | 2020 |
| Blink Eiendomsutvikling AS | Real estate | 2011 |
| Blinkhus BT Stavanger A/S | Real estate | 1999 |
| Blinkhus Sørvest AS | Construction | 2009 |
| Blinktech AS | Administrative & support | 2011 |
| Blinni Invest AS | | 2024 |
| Bloch Holmvik Holdning AS | | 2025 |
| Blocksea Holding AS | | 2018 |
| Blohm Invest AS | Financial services | 2005 |
| Blokkjeden AS | | 2023 |
| Blomen Hage Og Landskap AS | Administrative & support | 2013 |
| Bloom Concept and Consultancy AS | Wholesale & retail | 2022 |
| Bltc Holding AS | | 2026 |
| Blu Electro Ansatte AS | Financial services | 2020 |
| Blu Electro AS | Construction | 2020 |
| Blu Management AS | Professional & scientific | 2000 |
| Blu Offshore AS | Administrative & support | 2016 |
| Blue Farm AS | Professional & scientific | 2014 |
| Blue Norges Veritaas AS | Professional & scientific | 2019 |
| Blue Ocean AS | Manufacturing | 2007 |
| Blue Planet AS | Professional & scientific | 2004 |
| Blue Sky Riviera AS | Real estate | 2003 |
| Blue Wind AS | Professional & scientific | 2019 |
| Bluebonnet AS | | 2025 |
| Blueleap AS | Professional & scientific | 2018 |
| Bluemint AS | Information & communication | 2023 |
| Blueplanet Academy AS | Education | 2016 |
| Bluetech AS | Professional & scientific | 2019 |
| Bluevy AS | Professional & scientific | 2025 |
| Blumarbl AS | Information & communication | 2020 |
| Blunk AS | Professional & scientific | 2026 |
| Blusse AS | Professional & scientific | 2024 |
| Blygeharry AS | Hospitality | 2017 |
| Blár Aqua AS | Agriculture & fishing | 2017 |
| Blár AS | Agriculture & fishing | 2017 |
| Blár Operations AS | | 2026 |
| Blár Technology AS | Professional & scientific | 2024 |
| Blå AS | Real estate | 2023 |
| Blåfjell 1236 AS | Wholesale & retail | 2015 |
| Blåkrone AS | | 2025 |
| Blånoter AS | Financial services | 2007 |
| Blåveis AS | Information & communication | 2018 |
| Blåveis Stavanger AS | Hospitality | 2024 |
| Blåveisen Blomster AS | Wholesale & retail | 2015 |
| BM Sunde AS | Professional & scientific | 2020 |
| Bma Invest AS | Transport & logistics | 2021 |