| 29 Minute Books AS | Information & communication | 2014 |
| 7 Fjell Bil Vest AS | Wholesale & retail | 2020 |
| 7 Fjell Bolig AS | Real estate | 2016 |
| 7 Fjell Bygg & Maling AS | Construction | 2024 |
| 7 Fjell Taxi AS | Transport & logistics | 2022 |
| 7 Invest AS | | 2020 |
| 7FJELL Eiendomsutvikling AS | Real estate | 2019 |
| 7FJELL Elektro AS | Construction | 2026 |
| A Landmark Invest AS | | 2026 |
| A Titlestad AS | Construction | 1991 |
| A Tour AS | Administrative & support | 2024 |
| A-Dapt Holding AS | Water & waste | 2023 |
| A-E Invest AS | Real estate | 2025 |
| A-Media Norge AS | Professional & scientific | 1993 |
| A. J. Bygg AS | Construction | 2008 |
| A.R.S Invest AS | | 2022 |
| A/Stab AS | Professional & scientific | 2002 |
| A/Stab Rogaland AS | Professional & scientific | 2024 |
| A9 Tekniske Norge AS | Wholesale & retail | 2002 |
| Aadi Holding AS | | 2026 |
| Aanderaa Data Instruments AS | Manufacturing | 1997 |
| Abadia AS | Information & communication | 2016 |
| Abas Kosmetikk AS | Wholesale & retail | 2009 |
| Above AS | Manufacturing | 2018 |
| Abyrgo AS | Real estate | 2025 |
| Ac Stoltz Invest AS | | 2020 |
| Acerto Skatterådgivning AS | Professional & scientific | 2026 |
| Acsa AS | Financial services | 2015 |
| Adis Grabovac Holding AS | Real estate | 2021 |
| Adrianbygger AS | Construction | 2025 |
| Adso Holding AS | | 2023 |
| Advanced Language Da | Arts & recreation | 2011 |
| Advisitor AS | Wholesale & retail | 2021 |
| Advokat Erik Jønsson AS | Professional & scientific | 2007 |
| Aem Holding AS | Construction | 2016 |
| Aeto AS | Information & communication | 2018 |
| Aga Eiendomsselskap AS | Real estate | 1983 |
| Aga Holding AS | | 2019 |
| Agnes Renhold AS | Administrative & support | 2016 |
| Ago Invest AS | Real estate | 2025 |
| Ahe Helse AS | Education | 2012 |
| Akks Holding Og Eiendom AS | | 2022 |
| Al Kjenndalstoppen Huseierlag | Other services | 1996 |
| Al-Damar AS | Health & social care | 2023 |
| Alarmer Og Sikkerhet AS | Construction | 2018 |
| Alcorp AS | | 2013 |
| Alexandersson Invest AS | | 2021 |
| Alfa Bil AS | Transport & logistics | 2017 |
| Alfa Bolig Vest AS | Real estate | 2023 |
| Alfa Centauri AS | Financial services | 2005 |
| Alfa Omega Elektro AS | Construction | 2015 |
| Alfa Prosjektering AS | | 2019 |
| Alfanumerix AS | | 2022 |
| Alg Holding AS | | 2005 |
| Alik Industrikompani AS | Construction | 2014 |
| Allbygg AS | Construction | 2017 |
| Allers Invest AS | Financial services | 2005 |
| Allier AS | Construction | 1998 |
| Allstar Invest AS | | 2026 |
| Allteam AS | Administrative & support | 2019 |
| Almyra AS | Real estate | 2021 |
| Almås Kapital AS | | 2025 |
| Alpha Osteopati Da | Real estate | 2009 |
| Alsaker Tekstil AS | Wholesale & retail | 2025 |
| Alsin AS | | 2023 |
| Alt Bygg & Mur AS | Professional & scientific | 2008 |
| Alt Japansk AS | Wholesale & retail | 2026 |
| Alveria Nordic AS | Wholesale & retail | 2026 |
| Amber Aura AS | Arts & recreation | 2024 |
| Amcb Holding AS | | 2020 |
| Amendo AS | Professional & scientific | 2007 |
| Ampere Finans AS | Professional & scientific | 2021 |
| Anbona AS | Real estate | 2001 |
| Anders O Grevstad AS | Construction | 1996 |
| Andersen & Ljosheim Bygg AS | Construction | 2012 |
| Andersen & Ljosheim Eiendom AS | Real estate | 2019 |
| Andersen & Ljosheim Holding AS | Real estate | 2019 |
| Andersen & Ljosheim Prosjekt AS | Construction | 2021 |
| Anderst Holding AS | | 2019 |
| Andy Broski Beats AS | Information & communication | 2024 |
| Ane Blich House AS | Wholesale & retail | 2006 |
| Angelskår Holding AS | Financial services | 2017 |
| Anrop Da | Arts & recreation | 2004 |
| Anto Bil AS | Wholesale & retail | 2013 |
| Anton Olsen AS | Real estate | 1989 |
| Anvik AS | Real estate | 2009 |
| Anylite AS | Information & communication | 2021 |
| Aog Bygg AS | Construction | 1993 |
| Apeltunet AS | Real estate | 1996 |
| Arcoline Arkitektur AS | Professional & scientific | 2024 |
| Arda AS | | 2021 |
| Aria Jean Holding AS | | 2026 |
| Arild Aase Takst Og Maling AS | Construction | 2023 |
| Arna Textil AS | Real estate | 1924 |
| Arned Holding AS | Financial services | 2005 |
| Arnes Motorverksted AS | Other services | 2018 |
| Arnestad Pianostemming Og Service AS | Other services | 2013 |
| Arque Norway AS | Transport & logistics | 2020 |
| Arsk-Holding AS | | 2022 |
| Arstein AS | Professional & scientific | 2007 |