| Askim Videoverksted AS | Information & communication | 2022 |
| Askjem Eiendom AS | Real estate | 2017 |
| Asklandtema AS | Professional & scientific | 2025 |
| Asko Norge AS | Wholesale & retail | 2022 |
| Asko Oslo AS | Wholesale & retail | 2000 |
| Askor AS | Information & communication | 2024 |
| Askungen AS | | 2026 |
| Askveien 4 Hønefoss AS | Real estate | 2022 |
| Asky Invest AS | Financial services | 2015 |
| Askø Adv Oslo AS | Professional & scientific | 2021 |
| Asl Holding AS | Transport & logistics | 2014 |
| Asl Invest AS | Financial services | 2005 |
| Aslak Boligruppe SA | Other services | 2017 |
| Aslak Maurstad AS | Arts & recreation | 2026 |
| Aslak Skorpen Holding AS | Professional & scientific | 2024 |
| Aslaksrud AS | Construction | 2006 |
| Aslaksrud Communications AS | Professional & scientific | 2021 |
| Aslakveien 16-18 AS | Real estate | 1998 |
| Aslakveien 17 AS | Real estate | 2024 |
| Aslakveien 20 AS | Real estate | 2006 |
| Aslakveien Invest AS | Real estate | 2011 |
| Aslam Consulting AS | Information & communication | 2014 |
| Aslam Holding AS | | 2022 |
| Aslan AS | | 2020 |
| Aslan Invest AS | | 2025 |
| Aslany Holding AS | Real estate | 2021 |
| Asle Holding AS | | 2022 |
| Asle Nilsen AS | Arts & recreation | 2015 |
| ASLG3 Parkering Da | Transport & logistics | 2024 |
| Aslund Holding AS | | 2019 |
| Asløp AS | | 2020 |
| Asm Invest AS | Financial services | 2006 |
| Asmara Bar & Restaurant AS | Hospitality | 2022 |
| Asmara Salong AS | Other services | 2020 |
| Asmervik Invest AS | Financial services | 2006 |
| Asmodee Norge AS | Wholesale & retail | 2005 |
| Asmund Kollbye AS | | 2021 |
| Asmunds Holding AS | | 2024 |
| Asne Bygg AS | Construction | 2018 |
| Asneda AS | Information & communication | 2023 |
| Asnes AS | Real estate | 2021 |
| Asnn Holding AS | | 2019 |
| Aso SH Eiendom AS | Real estate | 2019 |
| Asodar AS | Administrative & support | 2019 |
| Asoerli AS | Hospitality | 2023 |
| Asoftia AS | Information & communication | 2020 |
| Asoha AS | Information & communication | 2026 |
| Asok Endringstjenester AS | Health & social care | 2002 |
| Asolo Holding AS | | 2025 |
| Asona Norway AS | Wholesale & retail | 2019 |
| Asos Bilsenter AS | Wholesale & retail | 2025 |
| Asp Arkitekter AS | Professional & scientific | 2025 |
| Aspaas & Frostad Da | Arts & recreation | 1995 |
| Aspade International AS | Professional & scientific | 2000 |
| Aspan AS | Professional & scientific | 2018 |
| Asparhaugen Eiendom AS | Real estate | 2020 |
| Asparhaugen Invest AS | Real estate | 2017 |
| Aspbo AS | Real estate | 2025 |
| Aspeborg AS | Professional & scientific | 2014 |
| Aspeborg Generations AS | | 2022 |
| Aspect AS | Professional & scientific | 2017 |
| Aspect Film AS | Information & communication | 2011 |
| Aspehaugveien 19 AS | Real estate | 2022 |
| Aspeli AS | Wholesale & retail | 1999 |
| Aspeli Holding AS | Wholesale & retail | 2005 |
| Aspelien AS | Professional & scientific | 2023 |
| Aspelien Holding AS | Professional & scientific | 2022 |
| Aspelin AS | Real estate | 2015 |
| Aspelin Eiendom Holding AS | Wholesale & retail | 2020 |
| Aspelin Holding AS | Real estate | 2020 |
| Aspelin Ramm Handel AS | Real estate | 1997 |
| Aspelin Reitan Drift AS | Real estate | 1990 |
| Aspelin Reitan Eiendom AS | Real estate | 1977 |
| Aspelin Reitan Eiendom Holding AS | | 2025 |
| Aspelin Reitan Gardermoen AS | Real estate | 2016 |
| Aspelin Reitan Kjeller AS | Real estate | 1993 |
| Aspelin Reitan R26 AS | Real estate | 1994 |
| Aspelin Reitan Utvikling AS | Real estate | 1997 |
| Aspelin Reitan Vare AS | Real estate | 2016 |
| Aspelunden Holding AS | | 2025 |
| Aspen & Haug Da | Construction | 2011 |
| Aspen Pharma Ireland Limited Nuf | Professional & scientific | 2018 |
| Aspenberg Consulting AS | Information & communication | 2017 |
| Aspera AS | Financial services | 2014 |
| Aspera Holding AS | Professional & scientific | 2008 |
| Asperheim Holding AS | Financial services | 2016 |
| Asperud Dagligvarer AS | Wholesale & retail | 2025 |
| Asperud Eiendom BHG AS | Education | 2015 |
| Asperud Fus Barnehage AS | Education | 2019 |
| Asperud Mat Ans | Wholesale & retail | 1991 |
| Aspeslåen Consulting AS | Information & communication | 2014 |
| Aspestrand Eiendom AS | Professional & scientific | 2021 |
| Aspestrand Holding AS | Professional & scientific | 2021 |
| Aspgro Invest AS | Real estate | 2017 |
| Asphaltcoredams AS | Professional & scientific | 2019 |
| Aspheim Flygel Og Pianosenter AS | Wholesale & retail | 1924 |
| Aspia Norge AS | Professional & scientific | 2019 |
| Aspia Norge Holding AS | Professional & scientific | 2022 |
| Aspico Trading Ans | Wholesale & retail | 1990 |
| Aspira AS | Construction | 2016 |