| 137 Holding AS | Real estate | 2021 |
| 150 Holding AS | | 2025 |
| 1ELEKTRIKER AS | Construction | 2009 |
| 22SAND Invest AS | | 2024 |
| 3 L Marketing Da | Professional & scientific | 2007 |
| 731 Holding AS | | 2025 |
| 7S Arkitektur AS | Professional & scientific | 2022 |
| Able Advisory AS | Real estate | 2022 |
| Abraxas AS | Professional & scientific | 1995 |
| Adhoc Solutions Ltd Nuf | Transport & logistics | 2017 |
| Adventure Overland Gear AS | Professional & scientific | 2025 |
| Advokat Otterstad AS | Professional & scientific | 2024 |
| Advokat Øyehaug AS | Professional & scientific | 2011 |
| Adwans AS | Information & communication | 1986 |
| Afarm AS | | 2019 |
| Affluens Technologies AS | Information & communication | 2021 |
| Agrimann Norge AS | Wholesale & retail | 1995 |
| AGV6 AS | Real estate | 2020 |
| Aleen AS | Wholesale & retail | 2025 |
| Alekto AS | Professional & scientific | 2017 |
| Alekto Holding AS | Professional & scientific | 2021 |
| Alfheim AS | | 2017 |
| Alfr a Berge AS | Manufacturing | 1971 |
| Allyearcabin AS | Wholesale & retail | 2021 |
| Altair Holding AS | Real estate | 2017 |
| Ambrosia Norge Ans | Education | 1992 |
| Ame AS | Professional & scientific | 1996 |
| Amma Trading AS | Wholesale & retail | 2018 |
| Amorepresent AS | Professional & scientific | 2026 |
| Anouska AS | Wholesale & retail | 2020 |
| Anouska Holding AS | Wholesale & retail | 2009 |
| Apelstrand Holding AS | | 2026 |
| Apple Pie AS | Professional & scientific | 2016 |
| Ardent Consulting AS | Professional & scientific | 2006 |
| Arne B. Pedersen Transport AS | Transport & logistics | 2009 |
| Artie AS | Financial services | 2005 |
| Arveng Energy AS | Professional & scientific | 2025 |
| Arveng Industries AS | Professional & scientific | 2016 |
| AS Mercor | Health & social care | 1976 |
| AS Norconcrete | | 1965 |
| Asgeir Husum AS | | 2021 |
| Asker Betongsaging AS | Construction | 2021 |
| Asker Båt AS | Wholesale & retail | 2015 |
| Asker Dyreklinikk AS | Professional & scientific | 2022 |
| Asker Eiendomsdrift AS | Real estate | 2020 |
| Asker Elektriker AS | Construction | 2024 |
| Asker Entreprenør AS | Real estate | 2025 |
| Asker Gruppen AS | Construction | 2024 |
| Asker Og Bærum Rørleggerbedrift AS | Construction | 2022 |
| Asker Rørleggerbedrift AS | Construction | 2024 |
| Askhov AS | | 2020 |
| Aslo AS | Professional & scientific | 2025 |
| Asskildt Holding AS | Professional & scientific | 2018 |
| Ast Invest AS | | 2021 |
| Athyr Holding AS | Financial services | 2005 |
| Atoesta Holding AS | | 2021 |
| Attracted AS | Professional & scientific | 2017 |
| Aulie Freberg Svenssen Invest Ans | | 2000 |
| Auto Home Bilpleie AS | Other services | 2017 |
| Auto Skade & Lakk Holding AS | | 2019 |
| Az Båtservice AS | Manufacturing | 2023 |
| B + S Eiendom AS | Real estate | 2020 |
| B.J.N Invest AS | Financial services | 2014 |
| Babyshop AS | Wholesale & retail | 2001 |
| Backe & Backe AS | Real estate | 2017 |
| Bajavo AS | | 2019 |
| Bakkeguten AS | Wholesale & retail | 2005 |
| Baltasar AS | Information & communication | 2018 |
| Baltic Employer Oü Nuf | Administrative & support | 2022 |
| Bandara Invest AS | | 2018 |
| Barclay Holding AS | Professional & scientific | 2020 |
| Barde Invest AS | Professional & scientific | 2019 |
| Barde Service AS | Professional & scientific | 2025 |
| Basecap AS | Administrative & support | 2022 |
| Bearberry AS | Professional & scientific | 2020 |
| Bech Consulting AS | Information & communication | 2006 |
| Bech Holding AS | Real estate | 2005 |
| Bedre Formidler AS | Professional & scientific | 2011 |
| Bekkelaget Parkettsliperi AS | Construction | 1996 |
| Benares AS | | 2007 |
| Benmar Invest AS | | 2019 |
| Bergerlia 4 AS | Real estate | 2026 |
| Best Shot Media AS | Professional & scientific | 2025 |
| Best Shot Productions AS | Information & communication | 2011 |
| Bezit AS | | 2022 |
| Bil Og Fritidsartikler AS | Wholesale & retail | 2000 |
| Bilbo Holding AS | Real estate | 2005 |
| Bilentusiasten Ans | Wholesale & retail | 1997 |
| Bilfunn AS | Wholesale & retail | 1992 |
| Birger N Haug Eiendom AS | Real estate | 2020 |
| Birger N. Haug Holding AS | Other services | 2006 |
| Birks Holding AS | Real estate | 2018 |
| Bitveria AS | Professional & scientific | 2023 |
| Bjønnes Invest AS | Information & communication | 2008 |
| Bjønnessimperiet SA | Information & communication | 2020 |
| Bjørnøy Holding AS | | 2021 |
| Blix Agentur AS | Wholesale & retail | 2018 |
| Blix Datagulv AS | Construction | 2011 |
| Bluetellura AS | Professional & scientific | 2025 |
| Blåmann Møbler AS | Wholesale & retail | 1995 |