| Aegolius AS | | 2023 |
| Aeira AS | Information & communication | 2021 |
| Aekm Nutrition & Performance AS | Health & social care | 2026 |
| Ael Holding AS | Real estate | 2016 |
| Aelia Holding AS | Other services | 2020 |
| Aelita Holding AS | Information & communication | 2005 |
| Aem Service AS | Administrative & support | 2017 |
| Aema Invest AS | Professional & scientific | 2016 |
| Aen 944 Holding AS | | 2023 |
| Aentreprenør AS | Construction | 2011 |
| Aeon Biotech AS | Health & social care | 2023 |
| Aeons AS | | 2019 |
| Aep Norge AS | Information & communication | 2015 |
| Aepos Arkitekter Og Planleggere AS | Professional & scientific | 1989 |
| Aequitas Holding Arl Nuf | | 2025 |
| Aequitas Norway AS | Real estate | 2024 |
| Aequitas Shipping AS | Real estate | 2024 |
| Aer Holding AS | Professional & scientific | 2022 |
| Aer Interiors AS | Professional & scientific | 2020 |
| Aera AS | Administrative & support | 2021 |
| Aera Group AS | Wholesale & retail | 2018 |
| Aera Payment & Identification AS | Information & communication | 2016 |
| Aerial Movements AS | Education | 2024 |
| Aeriksen Invest AS | Financial services | 2012 |
| Aero Training Erm Limited | Wholesale & retail | 2025 |
| Aeroflot Russian Airlines | Transport & logistics | 1995 |
| Aeromobile AS | Information & communication | 1994 |
| Aeropreta Norge AS | | 2008 |
| Aerticket Norway AS | Administrative & support | 2026 |
| Aes Invest AS | Financial services | 2016 |
| Aesar Dental AS | Health & social care | 2023 |
| Aesg Holding AS | | 2023 |
| Aesir Investments AS | Education | 2020 |
| Aesop AS | Information & communication | 2003 |
| Aesseal Nordic | Wholesale & retail | 2009 |
| Aesseal Nordic AS | Wholesale & retail | 2005 |
| Aesthera Med AS | | 2024 |
| Aesthetic Studio Oslo AS | Health & social care | 2021 |
| Aestmed AS | Information & communication | 2016 |
| Aeta Holding AS | | 2025 |
| Aeterna AS | Real estate | 2022 |
| Aeternum AS | | 2019 |
| Aeternum Capital AS | Financial services | 2020 |
| Aeternum Management AS | Financial services | 2020 |
| Aetervia AS | Information & communication | 2025 |
| Aethelsoul AS | Wholesale & retail | 2025 |
| Aethra AS | | 2022 |
| Aetos Invest AS | | 2008 |
| Aeva AS | Agriculture & fishing | 2022 |
| Aevi Eiendom AS | Real estate | 2018 |
| Aevi Prosjekt 01 AS | | 2022 |
| Aevon Holding AS | | 2026 |
| Aevum AS | Information & communication | 2024 |
| Aevy AS | Information & communication | 2024 |
| Aex Transport AS | Transport & logistics | 1989 |
| Aexhelior AS | Information & communication | 2026 |
| Af Capital AS | Financial services | 2021 |
| Af Decom AS | Construction | 2007 |
| Af Eiendomspartner AS | Real estate | 2026 |
| Af Energi AS | Professional & scientific | 2001 |
| Af Energi Og Miljø AS | Professional & scientific | 2008 |
| Af Equity AS | | 2025 |
| Af Gruppen ASA | Construction | 1985 |
| Af Gruppen Holding AS | Construction | 2017 |
| Af Gruppen Norge AS | Construction | 1985 |
| Af Håndverk AS | Construction | 2019 |
| Af Håndverk Østfold AS | Construction | 2023 |
| Af Kjøkkenmontasje Og Snekkeri AS | Construction | 2019 |
| Af Miljøbase Vats AS | Real estate | 2007 |
| Af Offshore AS | Construction | 2008 |
| Af Offshore Decom AS | Water & waste | 2007 |
| Af Rengjøring Ans | Administrative & support | 1982 |
| Af Renhold AS | Administrative & support | 2024 |
| Afa Bygg AS | Construction | 2024 |
| Afa Holdco AS | | 2024 |
| Afas 081225-11 AS | | 2025 |
| Afas Invest AS | | 2025 |
| Afc AS | Professional & scientific | 1994 |
| Afe Invest 18 AS | Real estate | 2024 |
| Afel AS | Hospitality | 2019 |
| Afes Norge Nuf | | 2003 |
| Affa International AS | Wholesale & retail | 2020 |
| Affa International Holding AS | Construction | 2020 |
| Affari Associates AS | | 2023 |
| Affeksjonsverdi 5000 AS | | 2022 |
| Affekt AS | Information & communication | 2025 |
| Affenwixen AS | Financial services | 2006 |
| Affin AS | | 2021 |
| Affinity Dry AS | Transport & logistics | 2022 |
| Affinity Offshore AS | Transport & logistics | 2017 |
| Affinity Projects AS | Transport & logistics | 2022 |
| Affinity Tankers AS | Transport & logistics | 2025 |
| Affitech Research AS | Professional & scientific | 1996 |
| Affix Oslo AS | Construction | 2021 |
| Affy AS | Information & communication | 2018 |
| Afghan Darbar AS | Hospitality | 2013 |
| Afghan House AS | Hospitality | 2025 |
| Afghan Wings AS | | 2024 |
| Afgn Invest 1 AS | Construction | 2009 |
| Afh AS | | 2019 |