| AS Meritum | Real estate | 1982 |
| AS NB Bar | Hospitality | 2024 |
| AS Norsk Gartneri Og Hageservice | Wholesale & retail | 1975 |
| AS Orknøy | Real estate | 2018 |
| AS Passion for Wine | Wholesale & retail | 2013 |
| AS Parma | Financial services | 1983 |
| AS Raadstuen | Real estate | 2024 |
| AS Sitt AS | Real estate | 2022 |
| AS Skagen 8 | Real estate | 1942 |
| AS Sæter Jørgensen Contemporary | Professional & scientific | 2018 |
| AS Termes | Real estate | 1983 |
| AS Vaagen 35 | Real estate | 2007 |
| AS Vaagen 9 | Real estate | 2016 |
| AS Verbum | Real estate | 1970 |
| AS Wesselsgate 25 | Households | 1956 |
| AS Åmdal Invest | Information & communication | 2018 |
| Asbjørn Gismarvik Holding AS | Financial services | 2017 |
| Asbjørnsen AS | Real estate | 1995 |
| Ascenium AS | Information & communication | 2019 |
| Ascenium Holding AS | | 2011 |
| Ascon AS | Professional & scientific | 1990 |
| Asec Holding AS | | 2021 |
| Asem Holding AS | Financial services | 2005 |
| Asgautsen Invest AS | | 2025 |
| Ash AS | Professional & scientific | 2018 |
| Asir AS | Professional & scientific | 2008 |
| Aske Fashion Design AS | Wholesale & retail | 2024 |
| Aske-Gården AS | Real estate | 2017 |
| Askeland AS | Wholesale & retail | 2000 |
| Askeland BR. Bygg AS | Construction | 2025 |
| Askeland Eiendom AS | Real estate | 1975 |
| Askheim Holding AS | Financial services | 2005 |
| Askildsen Holding AS | | 2021 |
| Askja Holding AS | | 2021 |
| Askme AS | Real estate | 2010 |
| Askvik Invest AS | Education | 2023 |
| Askø Invest AS | Financial services | 2018 |
| Asov AS | Real estate | 2006 |
| Asp Data Center AS | Real estate | 2023 |
| Asp DC ASA | | 2025 |
| Asp DC Management AS | Real estate | 2026 |
| Asp DC Suldal AS | | 2025 |
| Asp Eiendom AS | Real estate | 2008 |
| Asp Forvaltning AS | Real estate | 2023 |
| Asp Prosjekt 2 AS | | 2023 |
| Asp Prosjekt 4 AS | Real estate | 2025 |
| Asp Prosjekt 5 AS | Real estate | 2025 |
| Aspira Holding AS | Wholesale & retail | 2012 |
| Aspøy Ellingsen Holding AS | | 2026 |
| Asserson AS | Real estate | 2023 |
| Asset Integrity AS | Mining & quarrying | 2020 |
| Assist IT AS | Information & communication | 2019 |
| Assist Stavanger AS | Wholesale & retail | 2007 |
| Assuranse Invest AS | Real estate | 1992 |
| Astana AS | Real estate | 2005 |
| Asteri Malerfirma AS | Construction | 2025 |
| Asteroidebakken AS | | 2020 |
| Astra II AS | Real estate | 2005 |
| Astral AS | | 2019 |
| Astralution AS | Information & communication | 2015 |
| Asu AS | | 2020 |
| Atacama AS | Financial services | 1998 |
| Ataksering AS | Real estate | 2023 |
| Atego AS | Professional & scientific | 2014 |
| Atelier Juels AS | Professional & scientific | 2026 |
| Atelier Varmen AS | Arts & recreation | 2018 |
| Atio AS | Real estate | 2023 |
| Atlaksvoll AS | Financial services | 2016 |
| Atlantic Playground AS | Education | 2022 |
| Atlantic Revisjon AS | Professional & scientific | 1993 |
| Atlas Arkitektur AS | Professional & scientific | 2025 |
| Atlas Cerno AS | Administrative & support | 2011 |
| Atlas Drift AS | Administrative & support | 2008 |
| Atlas Helse Og Velvære Stavanger AS | Other services | 2023 |
| Atmosos AS | Information & communication | 2026 |
| Aton AS | Real estate | 2012 |
| Aton Group AS | | 2026 |
| Attende AS | Health & social care | 1991 |
| Attende Holding AS | Real estate | 2021 |
| Attende Kompetanse AS | Education | 2021 |
| Attila Eiendom AS | Real estate | 2017 |
| Attraktiv Invest AS | Other services | 2018 |
| Atumcases AS | Wholesale & retail | 2011 |
| Atv Norge AS | Wholesale & retail | 2019 |
| Audhumla Holding AS | | 2020 |
| Auga Eiendom AS | Real estate | 2019 |
| Auglendsdalen 77 AS | Real estate | 2021 |
| Auglendsdalen 83 AS | Real estate | 2002 |
| Auglendsdalen Eiendom AS | Real estate | 2008 |
| Auglendsdalen, Frelsesarmeens Barnehage I Stavanger AS | Education | 2022 |
| Auglendsmyrå 11-17 AS | Real estate | 2001 |
| Auglendsmyrå 2 AS | Real estate | 2006 |
| Auglendsmyrå 3 AS | Real estate | 2005 |
| Auglendsmyrå 5 AS | Real estate | 2013 |
| Auglendsmyrå 6 AS | Real estate | 2006 |
| Auglendsmyrå 9 AS | Real estate | 2018 |
| Augmento AS | Health & social care | 2024 |
| Augustum AS | Real estate | 2014 |
| Aulinko AS | Professional & scientific | 2020 |
| Aum AS | Professional & scientific | 2020 |