| 1000 Bygg Service AS | Construction | 2023 |
| 1904 Eiendom AS | Real estate | 2020 |
| 2018 Eiendom AS | Real estate | 2004 |
| 2MREN AS | Professional & scientific | 2019 |
| 3-WHEELS Invest AS | | 2024 |
| 33KONSEPT AS | Information & communication | 2024 |
| 3DP Modelling AS | Professional & scientific | 2006 |
| 42 Invest AS | | 2026 |
| 42 Labs AS | Information & communication | 2026 |
| 4WARD AS | Professional & scientific | 2022 |
| 62 Nord AS | Transport & logistics | 2006 |
| 7OCEAN AS | Professional & scientific | 2010 |
| 7OCEAN Holding AS | Professional & scientific | 2013 |
| 7STARSEAFOOD AS | | 2023 |
| A & a Eiendomsdrift AS | Real estate | 2026 |
| A E Holding AS | Health & social care | 2005 |
| A Endresen Holding AS | Professional & scientific | 2019 |
| A K Eiendom AS | Financial services | 2021 |
| A K Invest AS | Real estate | 1907 |
| A Oksnes AS | Wholesale & retail | 2002 |
| A&O Seafood Export AS | Wholesale & retail | 2007 |
| A-11 Apartments AS | | 2020 |
| A-11 Eiendom AS | Real estate | 2022 |
| A-B Invest AS | Other services | 2005 |
| A-Holding AS | Financial services | 2005 |
| A. Gjerland Holding AS | | 2023 |
| A. M. Liaaen AS | Real estate | 1983 |
| A.H.Alm Eiendom AS | Real estate | 2014 |
| A/S Kvikk | Real estate | 1988 |
| A/S Longvafisk | Wholesale & retail | 1988 |
| A/S Spilka Industri | Manufacturing | 1933 |
| A2B Design Partner AS | Professional & scientific | 2011 |
| A2B Holding AS | Professional & scientific | 2012 |
| A44 Studio AS | | 2021 |
| Aakre Bolig AS | Real estate | 2025 |
| Aakre Holding AS | Manufacturing | 1998 |
| Aaland Eiendom AS | Real estate | 1986 |
| Aaland Holding AS | Other services | 2005 |
| Aalesund Areal AS | Real estate | 2022 |
| Aalesund Bilverksted AS | Other services | 2024 |
| Aalesund Classics AS | Wholesale & retail | 2023 |
| Aalesund Enterprises AS | Manufacturing | 2017 |
| Aalesund Havne Og Terminaltjenester AS | Administrative & support | 2018 |
| Aalesund Industri Og Finans AS | Real estate | 1893 |
| Aalesund Protective Wear AS | Manufacturing | 1983 |
| Aalesund Salg Og Bilutleie AS | Administrative & support | 2026 |
| Aalesund Seafood AS | Wholesale & retail | 1994 |
| Aalesund Shipping AS | Agriculture & fishing | 2020 |
| Aalesund Shipping Group AS | Real estate | 1989 |
| Aalesund Travel Company AS | Transport & logistics | 2026 |
| Aalesund Varetransport AS | Transport & logistics | 2014 |
| Aamås Holding AS | Financial services | 2015 |
| Aarflot Havnevik AS | Wholesale & retail | 1937 |
| Aarsæther Eiendom AS | Real estate | 1993 |
| Aasly AS | Real estate | 2016 |
| Abacs AS | Real estate | 2005 |
| Abaro Holding AS | | 2025 |
| Abc Donut Da | Manufacturing | 2021 |
| Abes AS | | 2026 |
| Abhinc AS | Professional & scientific | 2020 |
| Ably Production AS | Professional & scientific | 2016 |
| Ac Ervik Invest AS | | 2023 |
| Acc Holding AS | Real estate | 2008 |
| Ace Sjømat AS | Agriculture & fishing | 2023 |
| Acel AS | Manufacturing | 2005 |
| Acel Baltic Uab | Construction | 2005 |
| Acel Invest AS | Manufacturing | 2023 |
| Acel Powertech AS | Information & communication | 2022 |
| Acinom AS | Wholesale & retail | 2015 |
| Act Safe AS | Education | 2017 |
| Actero AS | | 2026 |
| Active Real Estate AS | Real estate | 2007 |
| Ad Property AS | Real estate | 2018 |
| AD1 Invest AS | Real estate | 2017 |
| Adea AS | Health & social care | 2002 |
| Adea Hjemmehjelp AS | Health & social care | 2012 |
| Adg AS | Financial services | 2005 |
| Adit Da | Information & communication | 2008 |
| Adko Invest AS | | 2020 |
| Administrator Systems AS | Information & communication | 2010 |
| Adn Holding AS | Real estate | 2016 |
| Adventhor AS | Information & communication | 2026 |
| Adviso Advokatfirma AS | Professional & scientific | 2012 |
| Advocator Advokatfirma AS | Professional & scientific | 2012 |
| Advokat Axel Lange AS | Professional & scientific | 2019 |
| Advokat Camilla Solbakken AS | Professional & scientific | 2018 |
| Advokat Dagfinn Tynes AS | Professional & scientific | 2016 |
| Advokat Elling Skaar AS | Professional & scientific | 2025 |
| Advokat Kjell Sigve Haugland AS | Professional & scientific | 2015 |
| Advokat Tarjei Aasen AS | Professional & scientific | 2012 |
| Advokatene Hovde Mna AS | Professional & scientific | 2007 |
| Advokatfirmaet Engelsen Da | Professional & scientific | 1996 |
| Advokatfirmaet Judicia AS | Professional & scientific | 2025 |
| Advokatfirmaet Opshaug Da | Professional & scientific | 2007 |
| Advokatfirmaet Skansen AS | Professional & scientific | 2014 |
| Ae Group AS | Real estate | 2017 |
| Aembd AS | Wholesale & retail | 2023 |
| Aesu Holding AS | | 2022 |
| Afr Holding AS | Professional & scientific | 2006 |
| Africa Custom Tours AS | Administrative & support | 2026 |