| 02HENNING AS | | 2021 |
| 2MT Holding AS | Hospitality | 2019 |
| 2RBE1 AS | Real estate | 2015 |
| 2XA Solutions AS | Transport & logistics | 2023 |
| 3 Døtre AS | Professional & scientific | 2023 |
| 3DELING Norway AS | Professional & scientific | 2017 |
| 3F Holding AS | Real estate | 2011 |
| 3KH Invest AS | Financial services | 2023 |
| 3MA Holding AS | Health & social care | 2019 |
| 3X Eiendom AS | Real estate | 2018 |
| 3X Trafikkskole AS | Education | 2016 |
| 4E Capital AS | Professional & scientific | 2020 |
| 4E Management AS | Professional & scientific | 2021 |
| 4FLIGHT Aviation Da | Real estate | 2022 |
| 4GNS Telecom AS | Construction | 2007 |
| 4SIDER AS | Professional & scientific | 2016 |
| 4SUBSEA Astori AS | Professional & scientific | 2017 |
| 4U & Me AS | Professional & scientific | 2016 |
| 58PLUS AS | Professional & scientific | 2007 |
| 5KU Holding AS | Real estate | 2017 |
| 5ME Invest AS | | 2022 |
| 5R-HOLDING AS | | 2023 |
| 5R-INVEST AS | | 2023 |
| 7TECHNOLOGIES AS | Construction | 2021 |
| 91X Group AS | | 2021 |
| A Bergan Holding AS | | 2024 |
| A Helliesen AS | Construction | 2023 |
| A I M AS | Wholesale & retail | 2021 |
| A I Renhold & Bygg AS | Administrative & support | 2015 |
| A Jonassen AS | Construction | 1997 |
| A P Engineering Aps | Administrative & support | 2012 |
| A Te M Holding AS | Financial services | 2011 |
| A Vagle Holding AS | | 2022 |
| A-Co AS | Financial services | 2015 |
| A-Gudmestad Holding AS | Financial services | 2013 |
| A-Varer AS | Wholesale & retail | 1974 |
| A. Edvardsen Holding AS | Wholesale & retail | 2018 |
| A. Future AS | | 2025 |
| A. K. Øverland Holding AS | Real estate | 2012 |
| A. Roan AS | Professional & scientific | 2017 |
| A.H.E. Dagligvare AS | Wholesale & retail | 2024 |
| A.I Varmepumper AS | Construction | 2013 |
| A.Kolnes Holding AS | | 2019 |
| A.Kva Drift AS | Real estate | 2011 |
| A.M. Services AS | Professional & scientific | 2014 |
| A1 Auto AS | Wholesale & retail | 2021 |
| A2INSIGHT AS | Information & communication | 2017 |
| A3 Investering AS | Transport & logistics | 2021 |
| A3 Terminaldrift AS | Real estate | 2021 |
| A3 Transport AS | Transport & logistics | 2021 |
| A4 Prosjekt AS | Construction | 2025 |
| A5 Bygg AS | Construction | 2022 |
| Aa Consulting & Holding AS | Real estate | 2021 |
| Aa Eiendom Sandnes AS | Real estate | 2010 |
| Aaah Invest AS | Professional & scientific | 2011 |
| Aabrekk Regnskap AS | Professional & scientific | 1987 |
| Aadnøy & Olufsen Da | Construction | 2004 |
| Aalgaard Bygg AS | Construction | 2011 |
| Aamod AS | Hospitality | 2020 |
| Aamodt Milde Invest AS | | 2021 |
| Aar-Hus AS | Real estate | 2022 |
| Aar-Invest AS | | 2019 |
| Aardest AS | Real estate | 2026 |
| Aarre AS | Administrative & support | 2008 |
| Aarrestad Blomster AS | Wholesale & retail | 1986 |
| Aarsvold AS | Manufacturing | 2012 |
| Aase Eiendom Invest AS | Real estate | 2006 |
| Aase Holding AS | Wholesale & retail | 2005 |
| Aase Invest AS | Real estate | 2005 |
| Aase Investering AS | Real estate | 1991 |
| Aase Landbruk AS | Wholesale & retail | 1991 |
| Aase Media AS | Information & communication | 2025 |
| Aase Rør AS | Construction | 2013 |
| Aaslandhjørnet AS | Real estate | 2021 |
| Aasnes Invest AS | Information & communication | 2018 |
| Aaudit AS | Professional & scientific | 2021 |
| Ab-Kapital AS | | 2005 |
| Abacus Revisjon AS | Professional & scientific | 2014 |
| Abir AS | | 2014 |
| Abør Invest AS | Real estate | 2015 |
| Ac Forvaltning AS | | 2020 |
| Acalis AS | Wholesale & retail | 2014 |
| Accoa AS | Professional & scientific | 2021 |
| Ace Consulting AS | Professional & scientific | 2007 |
| Aceshop AS | Wholesale & retail | 2017 |
| Aceshop Holding AS | Real estate | 2022 |
| Achilles Finans AS | Professional & scientific | 1990 |
| Acj Invest AS | | 2020 |
| Acqura AS | Professional & scientific | 2026 |
| Acron Infra AS | Professional & scientific | 2023 |
| Active Elektro AS | Construction | 2014 |
| Active Freedom AS | Education | 2024 |
| Ad Lib AS | | 2020 |
| Ad Maiora Semper AS | Professional & scientific | 2012 |
| Adams Coffee AS | Hospitality | 2020 |
| Adelante AS | | 2019 |
| Adept AS | Professional & scientific | 2006 |
| Adesso Eiendom AS | Real estate | 2023 |
| Adia Invest AS | Financial services | 2016 |
| Adinomics AS | | 2025 |