| Allister International AS | Information & communication | 2013 |
| Allister Story AS | Information & communication | 2020 |
| Alliswell Holding AS | | 2026 |
| Allié AS | Professional & scientific | 2025 |
| Allmedical AS | Wholesale & retail | 2019 |
| Allmuen Forlag AS | Information & communication | 2025 |
| Allocation AS | Professional & scientific | 2018 |
| Allocerius Holding AS | Professional & scientific | 2018 |
| Allora AS | Real estate | 2005 |
| Allproffs Da | Construction | 2010 |
| Allprosjekt AS | Transport & logistics | 2014 |
| Allscaff AS | Wholesale & retail | 2025 |
| Allsidig Håndverk AS | Administrative & support | 2024 |
| Allsidig Maler AS | Construction | 2012 |
| Allsidig Service AS | Real estate | 2023 |
| Allstad AS | Real estate | 2024 |
| Allstad Eiendomsutvikling AS | Real estate | 2009 |
| Allstad Energi AS | Professional & scientific | 2024 |
| Allstad Grunneiendom AS | Real estate | 2024 |
| Allstad Hjelpeselskap III AS | Real estate | 2024 |
| Allstad Kraft AS | | 2024 |
| Allstad Næringseiendom AS | Real estate | 2024 |
| Allstad Utviklingstomter AS | Real estate | 2024 |
| Allstein Holding AS | Manufacturing | 2005 |
| Allstuff Da | Wholesale & retail | 2021 |
| Alltec Fibre Ltd Nuf | Construction | 2025 |
| Alltid Eiendom AS | Real estate | 2015 |
| Alltid Eiendom Mo Gård AS | Real estate | 2015 |
| Alltid Eiendom Utleie AS | Real estate | 2023 |
| Alltid Lørdag AS | | 2024 |
| Alltid.J.S. AS | Real estate | 2018 |
| Alltino AS | Professional & scientific | 2014 |
| Alltrans Group AS | Real estate | 2024 |
| Allure AS | Wholesale & retail | 2024 |
| Allviva Health AS | Wholesale & retail | 2026 |
| Allwinds AS | Professional & scientific | 2026 |
| Ally AS | Information & communication | 2024 |
| Allé Eiendomsmegling AS | Real estate | 2014 |
| Alléallé! AS | Wholesale & retail | 2025 |
| Alléen AS | Hospitality | 2023 |
| Alléen Utvikling AS | Real estate | 2022 |
| Alm & Co AS | Wholesale & retail | 2025 |
| Alm 1 Holding AS | | 2021 |
| Alm Arkitekter AS | Professional & scientific | 2020 |
| Alm Consulting AS | Professional & scientific | 2021 |
| Alm Creative AS | Arts & recreation | 2026 |
| Alm Forvaltning AS | Construction | 2009 |
| Alm Holdco 1 AS | | 2025 |
| Alm Investco 1 AS | | 2025 |
| Alm Investments AS | Real estate | 2020 |
| Alm Investor AS | | 2025 |
| Alm Labs AS | Information & communication | 2026 |
| Alma Asset Management AS | | 2018 |
| Alma Eiendomsutvikling AS | Real estate | 2025 |
| Alma Management AS | | 2026 |
| Alma Proptech AS | Information & communication | 2026 |
| Alma Shabbir AS | Wholesale & retail | 2014 |
| Alma Spaces AS | Real estate | 2004 |
| Almali AS | Real estate | 2018 |
| Almanar Import Export Da | Manufacturing | 1994 |
| Almar Holding AS | | 2026 |
| Almar Studio AS | Other services | 2026 |
| Almashhadani AS | Transport & logistics | 2022 |
| Almassy Invest AS | Health & social care | 2024 |
| Almax AS | | 2005 |
| Almazol Agency AS | Arts & recreation | 2014 |
| Almby Invest AS | | 2021 |
| Alme Solutions AS | Education | 2019 |
| Almedahls AS | Wholesale & retail | 2014 |
| Almedalsveien 6 AS | Real estate | 1998 |
| Almedalsveien Holding AS | Real estate | 2021 |
| Almedoc AS | Health & social care | 1998 |
| Almeland Invest AS | Financial services | 2016 |
| Almelia - Sio Barnehage AS | Education | 2022 |
| Almestad Consulting AS | Information & communication | 2017 |
| Almhaug Bolig AS | | 2017 |
| Almia AS | Health & social care | 2022 |
| Almida Invest AS | | 2020 |
| Almirall AS | Professional & scientific | 2021 |
| Almløv Bergvarme AS | Construction | 2021 |
| Almo AS | | 2014 |
| Almo Eiendom AS | Real estate | 1969 |
| Almskog Invest Eiendom AS | Real estate | 2002 |
| Aln Invest AS | | 2023 |
| Alna Autopaint AS | Other services | 2020 |
| Alna Big Box AS | Real estate | 2023 |
| Alna Bil AS | Other services | 2025 |
| Alna Bil Og Bilpleie AS | Other services | 2014 |
| Alna Bil Og Karosseri AS | Other services | 2024 |
| Alna Eiendom AS | Real estate | 1986 |
| Alna Eiendomsinvest AS | Real estate | 2020 |
| Alna Elektro AS | Construction | 2016 |
| Alna Fysioterapi AS | Health & social care | 2009 |
| Alna Grill AS | Hospitality | 2024 |
| Alna Holding AS | Real estate | 2005 |
| Alna Invest AS | Real estate | 1989 |
| Alna Investering AS | | 2023 |
| Alna Kjøkken Og Innredning AS | Professional & scientific | 2023 |
| Alna Leasing AS | Administrative & support | 2016 |
| Alna Legesenter AS | Health & social care | 2025 |