| B & B Boatman Oslo AS | Transport & logistics | 2008 |
| B & B Finans Og Eiendom AS | Real estate | 2004 |
| B & B Gruppen AS | Real estate | 2007 |
| B & B Studio AS | Professional & scientific | 2017 |
| B & M Management AS | Administrative & support | 1991 |
| B & S Origin AS | | 2026 |
| B & W Capital AS | | 2022 |
| B 7 Kontorsenter AS | Administrative & support | 2009 |
| B a Wahl Invest AS | Real estate | 1988 |
| B Anlegg AS | Construction | 2018 |
| B Burken AB | Real estate | 2001 |
| B Bygg AS | Construction | 1967 |
| B Consult AS | Professional & scientific | 1988 |
| B D Service Brej AS | Construction | 2021 |
| B Group Norge AS | Wholesale & retail | 2016 |
| B Holdings AS | | 2018 |
| B Jordheim AS | | 2023 |
| B Kapital AS | Real estate | 2021 |
| B Langedal Holding AS | Financial services | 2016 |
| B M Larsen AS | Wholesale & retail | 1981 |
| B Major Da | Professional & scientific | 2024 |
| B N Holding AS | Construction | 2005 |
| B of H AS | Information & communication | 2025 |
| B Point S.R.O. | Manufacturing | 2011 |
| B S Teknikk AS | Construction | 1986 |
| B Sirius Holding AS | | 2023 |
| B Skaugen AS | Real estate | 1998 |
| B Utvikling AS | Real estate | 2020 |
| B V Nilsen AS | Wholesale & retail | 2018 |
| B&A Sentralen AS | Information & communication | 2022 |
| B&B International AS | Wholesale & retail | 2003 |
| B&B Partners AS | Real estate | 2006 |
| B&B Scandinavia AS | Administrative & support | 2025 |
| B&Bbl Kulturkonsulenter Ans | Administrative & support | 2005 |
| B&C Reis & Stillas AS | Construction | 2018 |
| B&C Stillas AS | Construction | 2014 |
| B&G Eiendom AS | | 2017 |
| B&H Sushi AS | Hospitality | 2026 |
| B&O Invest AS | | 2023 |
| B&P Invest AS | | 2016 |
| B&R Holding AS | Information & communication | 2021 |
| B&S Kultur AS | Hospitality | 2020 |
| B&T Holding AS | Wholesale & retail | 2024 |
| B&W Holding AS | | 2021 |
| B+L Studio AS | Wholesale & retail | 2026 |
| B-A Group AS | Wholesale & retail | 2023 |
| B-A Holding AS | Wholesale & retail | 2022 |
| B-Box AS | | 2025 |
| B-E Invest AS | Wholesale & retail | 2005 |
| B-Helland Holding AS | | 2025 |
| B-Inn AS | Real estate | 2007 |
| B-Mgmt AS | Professional & scientific | 2022 |
| B-Mind Holding AS | Professional & scientific | 2022 |
| B-O Consulting AS | Professional & scientific | 2006 |
| B-W Fremtid AS | | 2023 |
| B-Well AS | Education | 2025 |
| B-Yond AS | Arts & recreation | 2019 |
| B. Braaten Holding AS | | 2022 |
| B. Celik Holding AS | | 2020 |
| B. Culture AS | Manufacturing | 2020 |
| B. Fagerhøi AS | Real estate | 2014 |
| B. Furulund Holding AS | | 2021 |
| B. Gjerde AS | Real estate | 2007 |
| B. Hanstad Holding AS | Financial services | 2013 |
| B. Lavik Invest AS | | 2018 |
| B. Nyheim Holding AS | | 2025 |
| B. Reinhardt Holding AS | Information & communication | 2020 |
| B. Rock AS | Health & social care | 2023 |
| B. Tveter Holding AS | | 2019 |
| B.A Bygg AS | Construction | 2023 |
| B.A. Musikkservice AS | Wholesale & retail | 2025 |
| B.A.G.Holding AS | Real estate | 2023 |
| B.A.J. Consulting AS | Professional & scientific | 2008 |
| B.A.W Holding AS | Information & communication | 2022 |
| B.Bold AS | Professional & scientific | 2020 |
| B.Fleischer AS | Real estate | 2005 |
| B.G Eiendom AS | Real estate | 2023 |
| B.G Engineering Holding AS | Real estate | 2023 |
| B.H Holding AS | | 2025 |
| B.M. Eiendom AS | Real estate | 2007 |
| B.N.T Scandinavia AS | Wholesale & retail | 2016 |
| B.O. Steen Shipping AS | Real estate | 1989 |
| B.Performancephysio AS | Health & social care | 2021 |
| B.Riise AS | Financial services | 2014 |
| B.S.Bygg & Service AS | Construction | 1986 |
| B/L Holding AS | | 2025 |
| B1 Tomtebrygga AS | Real estate | 2012 |
| B16 Arkitektur & Landskap AS | Professional & scientific | 2013 |
| B2 Brødrene Da | Construction | 2011 |
| B2 Capital AS | Professional & scientific | 2019 |
| B2 Elektro AS | Construction | 2019 |
| B2 Impact AS | Administrative & support | 2015 |
| B2 Impact ASA | Financial services | 2008 |
| B2 Merino AS | Real estate | 2019 |
| B21.NO AS | Wholesale & retail | 2017 |
| B2B Executive Search & Rekruttering AS | Administrative & support | 2014 |
| B2B Invest AS | Real estate | 2015 |
| B2B Mobil AS | Information & communication | 2019 |
| B2B Salg AS | Professional & scientific | 2009 |
| B2K Holding AS | Real estate | 1982 |