| 1UP Live AS | Information & communication | 2021 |
| 3/4 GC Forvaltning AS | | 2023 |
| 42 Consulting AS | Information & communication | 2018 |
| 4KNITS AS | Wholesale & retail | 1997 |
| A/S Elektrisk Produktion Eiendomsselskap | Real estate | 1918 |
| A4 Consult AS | Professional & scientific | 2007 |
| Aalbu Media AS | | 2018 |
| Abb AS | Manufacturing | 2000 |
| Abb E-Mobility AS | Manufacturing | 2021 |
| Abb Holding AS | Manufacturing | 1895 |
| Abbott Medical Norway AS | Wholesale & retail | 2007 |
| Abbott Norge AS | Wholesale & retail | 1990 |
| Aboki Holding AS | | 2023 |
| Abs Progressus AS | | 2023 |
| Accenture Malaysia | Administrative & support | 2019 |
| Adato AS | Information & communication | 2010 |
| Adax Norge AS | Wholesale & retail | 2007 |
| Adelante Industrier AS | | 2024 |
| Adhoc Software AS | Information & communication | 1989 |
| Adseo AS | Professional & scientific | 2016 |
| Advokat Cathrine Bjune AS | Professional & scientific | 2013 |
| Aetos Green Nordic | Wholesale & retail | 2023 |
| Aft AS | | 2026 |
| Aicore Tech AS | Information & communication | 2026 |
| AIRDOME360 AS | | 2007 |
| Airit AS | Information & communication | 2023 |
| Aize AS | Information & communication | 2019 |
| Aize Holding AS | Information & communication | 2020 |
| Aker Asset Development AS | Manufacturing | 2020 |
| Aker Asset Development Holding AS | Manufacturing | 2021 |
| Aker Engineering Malaysia SDN BHD | Administrative & support | 2014 |
| Aker Mainstream Renewables AS | | 2020 |
| Aker MH Inc | Administrative & support | 2010 |
| Aker Midco AS | Manufacturing | 2025 |
| Aker MRP Holding AS | | 2020 |
| Aker Narvik DC AS | | 2025 |
| Aker Narvik Gpu AS | | 2025 |
| Aker Narvik Holding AS | Real estate | 2020 |
| Aker Offshore Wind AS | Professional & scientific | 2020 |
| Aker Offshore Wind Norway AS | Energy | 2023 |
| Aker Offshore Wind Operating Company AS | Professional & scientific | 2020 |
| Aker Offshore Wind Scotwind AS | Professional & scientific | 2021 |
| Aker Offshore Wind Sørlige Nordsjø 2 AS | Energy | 2023 |
| Aker Offshore Wind USA AS | Professional & scientific | 2020 |
| Aker Offshore Wind Utsira Nord AS | Energy | 2023 |
| Aker Powergas Subsea Private Limited | Administrative & support | 2013 |
| Aker Security AS | Mining & quarrying | 2024 |
| Aker Solution Inc | Professional & scientific | 2013 |
| Aker Solutions Malaysia SDN BHD | Professional & scientific | 2008 |
| Akvi Pharma AS | | 2020 |
| Alcatel Lucent Middle East and North Africa JLT | Wholesale & retail | 2015 |
| Alcatel Pakistan Limited | Professional & scientific | 2015 |
| Alcatel-Lucent Bell N.V. | Information & communication | 2015 |
| Alcatel-Lucent Egypt | Professional & scientific | 2015 |
| Alcatel-Lucent Espana | Administrative & support | 2016 |
| Alcatel-Lucent International | Professional & scientific | 2015 |
| Alcatel-Lucent Ireland Limited | Professional & scientific | 2015 |
| Alcatel-Lucent Portugal S.A. | Professional & scientific | 2015 |
| Alcatel-Lucent Telecom Limited | Professional & scientific | 2015 |
| Alcatel-Lucent Teletas | Information & communication | 2010 |
| Alcatel-Lucent USA Inc. | Information & communication | 2015 |
| Alcatel-Lucent W&C Afrika-Ivory Coast | Information & communication | 2016 |
| Alchemy Holding AS | Financial services | 2012 |
| Aldra Consulting AS | Information & communication | 2022 |
| Alex Ark AS | Professional & scientific | 2012 |
| Alex Lyd AS | Information & communication | 2015 |
| Alexander Zakharov Holding AS | Information & communication | 2022 |
| Alexandersen Invest AS | | 2019 |
| ALL4RECYCLE AS | Water & waste | 2023 |
| Alle Barna Sover AS | Health & social care | 2019 |
| Altitude Management AS | Administrative & support | 2012 |
| Am & Partners AS | | 2021 |
| Amera AS | Information & communication | 2020 |
| Ammakaffe AS | Wholesale & retail | 2017 |
| Amund Lundgaard Invest AS | | 2022 |
| Amundsen Spesial Fornebu S AS | Wholesale & retail | 2024 |
| Anamika Nordic AS | | 2013 |
| Ananta AS | | 2025 |
| Andregangstjenesten AS | Information & communication | 2026 |
| Angelsen Invest AS | Other services | 2016 |
| Anh Finans AS | Financial services | 2018 |
| Ans Tomo | | 1989 |
| Ansur AS | Information & communication | 2024 |
| Ansur Birdeye AS | Information & communication | 2010 |
| Ansur Technologies AS | Information & communication | 2005 |
| Ansurance AS | Information & communication | 2013 |
| Antelao Development AS | Information & communication | 2021 |
| Anwr Norway AS | Wholesale & retail | 2007 |
| Anyva Consult AS | Wholesale & retail | 2021 |
| Apelo AS | Other services | 2022 |
| Apex Consulting AS | Information & communication | 2023 |
| Apex Regnskap AS | Professional & scientific | 2022 |
| Arak AS | Information & communication | 2015 |
| Arctic Base Invest AS | Professional & scientific | 2012 |
| Arena Eiendom AS | Real estate | 2003 |
| Arena Eiendom Drift AS | Real estate | 2008 |
| Ariane Investments Limited Nuf | Other services | 2007 |
| Arketyp AS | Information & communication | 2025 |
| Arketyp Holding AS | | 2025 |
| Arles AS | Wholesale & retail | 2026 |