| Adinomics Global Fund AS | | 2025 |
| Adinomics Momentum Fund AS | | 2025 |
| Adr Sikkerhet AS | Professional & scientific | 2022 |
| Adriatic Bar Og Catering AS | Hospitality | 2018 |
| Advance Engineering AS | Professional & scientific | 2020 |
| Advanced Mechatronics AS | Professional & scientific | 2025 |
| Adventura Event & Travel AS | Administrative & support | 2024 |
| Adventures in Norway AS | Arts & recreation | 2024 |
| Advisiant AS | Professional & scientific | 2026 |
| Advokat Fredrik Undheim AS | Professional & scientific | 2026 |
| Advokat Haukalid Holding AS | | 2025 |
| Advokat Klovning Holding AS | | 2024 |
| Advokatene Borgersen & Steinsvåg AS | Professional & scientific | 2010 |
| Advokatfirma Sekse & Co Ans | Professional & scientific | 1989 |
| Advokatfirma Sekse & Co. AS | Professional & scientific | 2005 |
| Advokatfirma Stacom AS | Wholesale & retail | 2005 |
| Advokatfirma Øglænd & Co AS | Professional & scientific | 2006 |
| Advokatfirmaet Aspekt AS | Professional & scientific | 2021 |
| Advokatfirmaet Brambani AS | Professional & scientific | 2024 |
| Aec Invest AS | Wholesale & retail | 2012 |
| Aeo Holding AS | Real estate | 2017 |
| Aeonian 34 AS | Manufacturing | 2024 |
| Aer Inv AS | Real estate | 2026 |
| Aerarium AS | Professional & scientific | 2023 |
| Aeternitus Invest AS | Health & social care | 2018 |
| Aether AS | Real estate | 2014 |
| Aeu Invest AS | Financial services | 2013 |
| Af Klinikken AS | Health & social care | 2019 |
| Afil Norway AS | Professional & scientific | 2020 |
| Afriquip Solutions AS | Professional & scientific | 2023 |
| Agano AS | Professional & scientific | 2023 |
| Agano Invest AS | | 2025 |
| Agapanthus AS | Wholesale & retail | 2012 |
| Agape Norge AS | Wholesale & retail | 2012 |
| Agder Bær Og Grønt AS | Wholesale & retail | 2016 |
| Ages Consulting AS | Professional & scientific | 2008 |
| Agg Norway AS | Professional & scientific | 2026 |
| Agoya Holding AS | | 2026 |
| Agp Invest AS | | 2021 |
| Agri Maskiner AS | Wholesale & retail | 2019 |
| Ags Solutions AS | Professional & scientific | 2019 |
| Ah Invest AS | Real estate | 2005 |
| Ah Vest AS | Real estate | 2023 |
| Ahk AS | | 2011 |
| Aibel (Thailand) Ltd Nuf | Professional & scientific | 2011 |
| Aibel AS | Manufacturing | 2002 |
| Aibel ASA | Manufacturing | 2012 |
| Aibel Holding II AS | Manufacturing | 2012 |
| Aibel Holding III AS | Manufacturing | 2007 |
| Aibel Pte Ltd Nuf | Professional & scientific | 2008 |
| Aida AS | Professional & scientific | 2020 |
| Aihogsf Holding AS | | 2025 |
| Air Energi Norway AS | Professional & scientific | 2012 |
| Air Traffic Offshore AS | Administrative & support | 1985 |
| Airswift Global AS | Financial services | 2021 |
| Airswift Global Security Holdings AS | | 2023 |
| Airswift Norge AS | Administrative & support | 1998 |
| Aiu AS | Administrative & support | 2022 |
| Aixhub AS | Information & communication | 2025 |
| Aj Elektro AS | Construction | 2012 |
| Ajaxson & Lien AS | Wholesale & retail | 2016 |
| Ajensen AS | Construction | 2021 |
| Ajham Subsea Limited | Administrative & support | 2016 |
| Ak Utvikling AS | Wholesale & retail | 2021 |
| Ak-Invest AS | | 2014 |
| Akademiet Sandnes AS | Education | 2004 |
| Akiba AS | Professional & scientific | 2010 |
| Akme AS | Wholesale & retail | 2012 |
| Akmit Holding AS | Real estate | 2023 |
| Aksjer I AS | | 2012 |
| Aksjeselskapet Sandnes Sentrum Eiendom | Real estate | 2017 |
| Aksland AS | Professional & scientific | 2025 |
| Akstal AS | Professional & scientific | 2025 |
| Aktiv HMS Prosjekt Holding AS | Health & social care | 2021 |
| Aktiv Rogaland AS | Real estate | 2004 |
| Aktiv-Fysioterapi AS | Health & social care | 2000 |
| Aktive Foreldre SA | Education | 1987 |
| Ala AS | Financial services | 2005 |
| Alaa-Petphys AS | Professional & scientific | 2018 |
| Alarpsis AS | Professional & scientific | 2022 |
| Alb Eiendom AS | Real estate | 2011 |
| Alcap AS | Wholesale & retail | 1990 |
| Alcori AS | Professional & scientific | 2021 |
| Alden Capital AS | Financial services | 2007 |
| Alexander Mann Solutions AS | Administrative & support | 2013 |
| Alf Aase Holding AS | Education | 2005 |
| Alfa AS | | 2020 |
| Alfa Bilverksted AS | Other services | 1999 |
| Alfa Dekk AS | Wholesale & retail | 2020 |
| Alfa Dekk Hoveveien AS | Wholesale & retail | 2025 |
| Alfa Frakt AS | Transport & logistics | 2018 |
| Alfa Lavel Aalborg | Manufacturing | 1996 |
| Alfa-Invest AS | | 2019 |
| Alfabo AS | Wholesale & retail | 2015 |
| Alfabo Klima AS | Construction | 2024 |
| Algar Eiendom Og Utleie AS | Wholesale & retail | 1993 |
| Alicerce Forvaltning AS | Professional & scientific | 1997 |
| Alioth Holding AS | Real estate | 2023 |
| Alkymist AS | Wholesale & retail | 2005 |
| All Invest AS | | 2019 |