| Asia Nordic Investments AS | Real estate | 2014 |
| Asinor Konsulent AS | Administrative & support | 2019 |
| Ask Vest Bolig AS | Real estate | 2021 |
| Aslam Invest AS | Information & communication | 2016 |
| Atekk Tak Og Byggservice AS | Construction | 2014 |
| Atg AS | Construction | 2009 |
| Atlas Og Venner AS | | 2021 |
| Atlebi AS | Professional & scientific | 2005 |
| Audrius Invest AS | Financial services | 2016 |
| Auto Solution AS | Wholesale & retail | 2014 |
| Auto TEK1 AS | Administrative & support | 2023 |
| Auto-Skade AS | Other services | 2009 |
| Autoberging AS | Transport & logistics | 2022 |
| Autocruise AS | Wholesale & retail | 2021 |
| Autoexec AS | Professional & scientific | 2020 |
| Autoexperten Bilverksted AS | Other services | 2017 |
| Autokonsept AS | Wholesale & retail | 2011 |
| Autoservice Viken AS | Other services | 2014 |
| Autostern Bilpark AS | Wholesale & retail | 2021 |
| Avena-Invest AS | | 2024 |
| Avera Clinic AS | Other services | 2026 |
| Avicenna Cura AS | Administrative & support | 2022 |
| Axicon AS | Manufacturing | 1991 |
| Aya Sport AS | Wholesale & retail | 2020 |
| Azolver Norge AS | Wholesale & retail | 2000 |
| B & K Holding AS | Administrative & support | 2018 |
| B&W Invest AS | | 2022 |
| B&W INVEST2 AS | | 2026 |
| Babymagasinet AS | Wholesale & retail | 2005 |
| Badverket AS | Construction | 2022 |
| Bakkes Autolakk AS | Other services | 1990 |
| Balnor Entreprenør AS | Construction | 2023 |
| Barskt AS | Information & communication | 2025 |
| Bas Capital AS | Hospitality | 2016 |
| Basix AS | Wholesale & retail | 2015 |
| Bastri Peci AS | Transport & logistics | 2021 |
| Batteribilen AS | Wholesale & retail | 2013 |
| Bayerwald AS | Wholesale & retail | 2021 |
| BB Media AS | Professional & scientific | 2021 |
| BCV Invest AS | Information & communication | 2019 |
| BDP AS | Transport & logistics | 2020 |
| Be Yoga Studio AS | Education | 2015 |
| Beauty Ambassador AS | Other services | 2024 |
| Beauty Design Studio AS | Other services | 2015 |
| Bedriftsveien 120 AS | Real estate | 2006 |
| Beinvent AS | Professional & scientific | 2017 |
| Belle Group AS | | 2026 |
| Benign Images Nuf | Information & communication | 2012 |
| Benjamin Falck Film AS | Information & communication | 2017 |
| Benki AS | Construction | 2014 |
| Benki Eiendom AS | Construction | 2015 |
| Benuta AS | Construction | 2026 |
| Berger Express AS | Transport & logistics | 2011 |
| Bergersen VVS AS | Construction | 1991 |
| Bergstien 5 AS | Real estate | 2019 |
| Bertel O Steen AS | Wholesale & retail | 1956 |
| Bertel O Steen Finans AS | Financial services | 1999 |
| Bertel O. Steen Agro AS | Wholesale & retail | 2021 |
| Bertel O. Steen Bileiendom AS | Real estate | 2021 |
| Bertel O. Steen Bilutleie AS | Administrative & support | 2021 |
| Bertel O. Steen Detalj AS | Other services | 1968 |
| Bertel O. Steen Eiendom AS | Real estate | 2010 |
| Bertel O. Steen Eiendom Holding AS | Real estate | 2021 |
| Bertel O. Steen Eiendomsforvaltning AS | Real estate | 2021 |
| Bertel O. Steen Eiendomsutvikling AS | Real estate | 2021 |
| Bertel O. Steen Holding AS | Wholesale & retail | 2011 |
| Bertel O. Steen Kapital AS | Wholesale & retail | 2002 |
| Bertel O. Steen Lastebil Og Buss AS | Wholesale & retail | 2020 |
| Bertel O. Steen Lørenskog AS | Other services | 2002 |
| Bertel O. Steen Næringseiendom AS | Real estate | 2021 |
| Bertel O. Steen Trucks & Buses AS | Wholesale & retail | 2020 |
| Beta Wellness Norway AS | Wholesale & retail | 2023 |
| BHS Bolig AS | Real estate | 2020 |
| Big and Small BBQ AS | Hospitality | 2023 |
| Bigger Choice AS | Transport & logistics | 2020 |
| Bil M AS | Wholesale & retail | 2020 |
| Bilde Og Røntgenanalysesystemer AS | Wholesale & retail | 2007 |
| Bilgjenvinning AS | Wholesale & retail | 2006 |
| Bina Europe AS | Wholesale & retail | 1990 |
| Bjarne Stensli Dy Holding AS | Arts & recreation | 2016 |
| Bjarne Stensli Sound Production AS | Arts & recreation | 2015 |
| Bjella & Steinum Dentalconsult Ans | Professional & scientific | 2017 |
| Bjerknes Holding AS | Construction | 2005 |
| Bjørknes Holding AS | Real estate | 2019 |
| Bjørknes Taksering AS | Real estate | 2012 |
| Bjørn Olsen AS | | 1976 |
| Bk-Anlegg AS | Construction | 2014 |
| Bk-Anlegg Eiendom AS | Real estate | 2021 |
| Bk-Prosjekt AS | Construction | 2019 |
| BL Bygg Hytter AS | Construction | 2018 |
| BL Bygg Norge AS | Construction | 2022 |
| BL Byggservice AS | Construction | 2021 |
| Blakset Nordli Holding AS | | 2020 |
| Blå Ugle AS | Hospitality | 2021 |
| Bmkb AS | Construction | 2018 |
| BNB Holding AS | Real estate | 2020 |
| Boa Eiendomsutvikling AS | Real estate | 2018 |
| Boba Cha Lørenskog AS | Wholesale & retail | 2022 |
| Bojo Holding AS | | 2026 |
| Bosk Invest AS | Wholesale & retail | 2018 |