| 2 Anne Frisør AS | Other services | 2011 |
| 2BPERFECT Da | Wholesale & retail | 2002 |
| 2RE Eiendom AS | Real estate | 2017 |
| 2SMART Invest AS | | 2021 |
| 3 Holding AS | | 2022 |
| 3 Holding II AS | | 2023 |
| 3BYGG AS | Construction | 2012 |
| 4CON AS | Real estate | 2005 |
| 4HIRE AS | Administrative & support | 2011 |
| A Subsea AS | Professional & scientific | 2023 |
| A Svela Maskin AS | Construction | 2017 |
| A-Eiendom AS | Administrative & support | 2022 |
| A-G Maskin AS | Construction | 2012 |
| A-Mari AS | Professional & scientific | 2025 |
| Aa Classic Invest AS | | 2021 |
| Aa Prosjekt Nuf | Hospitality | 2009 |
| Aai Ansatte Invest 2 AS | Financial services | 2022 |
| Aal Industrier AS | Real estate | 2005 |
| Aara Holding AS | Real estate | 2021 |
| Aarbakke AS | Manufacturing | 2000 |
| Aarbakke Innovation AS | Professional & scientific | 2013 |
| Aarbakke Innovation Management Invest AS | | 2014 |
| Aarrestad AS | Wholesale & retail | 2000 |
| Aase Begravelsesbyrå AS | Other services | 2011 |
| Aasen Holding & Invest AS | | 2023 |
| Abb Robotics Norway AS | Professional & scientific | 2025 |
| Abdi Levinn Frisør 366 AS | Other services | 2026 |
| Abi Invest AS | Financial services | 2013 |
| Abk Group AS | | 2026 |
| Abobil.No AS | Wholesale & retail | 2019 |
| Abobil.No Eiendom AS | Real estate | 2017 |
| Activum Bryne AS | Real estate | 2018 |
| Addvant Jæren AS | Professional & scientific | 2023 |
| Adhoc AS | Information & communication | 2025 |
| Admg Norge AS | Wholesale & retail | 2022 |
| Adrett AS | Other services | 2009 |
| Advantage AS | Transport & logistics | 2008 |
| Advokat Bjørnsen Holding AS | | 2021 |
| Advokat Heskje Holding AS | Financial services | 2018 |
| Aeonian 29 AS | Real estate | 2024 |
| Aerotyne International AS | | 2024 |
| Aevent AS | Administrative & support | 2002 |
| Agath Eiendom AS | Real estate | 2012 |
| Agri Produkter AS | Manufacturing | 2018 |
| Agro Holding AS | | 2022 |
| Ahn Holding AS | Manufacturing | 2022 |
| Ahrum AS | Other services | 2023 |
| Aih Invest AS | | 2021 |
| Ais AS | Professional & scientific | 2015 |
| Ajg Invest AS | | 2026 |
| Aktinova AS | Real estate | 1999 |
| Aktiv Eiendomsmegling Jæren AS | Real estate | 1983 |
| Albir Kran AS | | 2024 |
| Alfa Safe AS | Administrative & support | 2020 |
| Allti Elektro AS | Construction | 2017 |
| Alstadsæter Invest AS | Arts & recreation | 2012 |
| Altisveis AS | Manufacturing | 2022 |
| Alunde Holding AS | Water & waste | 2005 |
| Alvelandet AS | Manufacturing | 2017 |
| Alvern Invest AS | Wholesale & retail | 2019 |
| Amberly Cosmetics AS | Education | 2012 |
| Amelo Holding AS | Health & social care | 2006 |
| Amme Holding AS | Real estate | 2022 |
| Amploy AS | Administrative & support | 2017 |
| Ana Eiendom AS | Real estate | 2011 |
| Anda Vardøy Holding AS | Real estate | 2014 |
| Anders I Serigstad Eiendom AS | Real estate | 1986 |
| Anemone Holding AS | | 2022 |
| Anne Helga Design AS | Manufacturing | 2024 |
| Ans Frisørsenteret | Other services | 1988 |
| Apex Holding AS | Education | 2022 |
| Aqua Energy Norge AS | Energy | 2021 |
| Aqua Robotics AS | Professional & scientific | 2016 |
| Aqvisor AS | Professional & scientific | 2015 |
| Arc Arkitektur AS | Professional & scientific | 2015 |
| Arctic Steel AS | Wholesale & retail | 2021 |
| Ariline Invest AS | | 2020 |
| Arium AS | Wholesale & retail | 2025 |
| ARK1 AS | Professional & scientific | 2008 |
| Arkitekturteknikk AS | Wholesale & retail | 2026 |
| Arland AS | Financial services | 1996 |
| Arli AS | Professional & scientific | 1997 |
| Arnfinn Holding AS | | 2022 |
| Arska Holding AS | Construction | 2022 |
| Artbeat Recording Studio AS | Arts & recreation | 2006 |
| Artoo-Detoo AS | Professional & scientific | 2013 |
| Arv Bygg AS | Construction | 2023 |
| AS Betong | Construction | 2022 |
| AS Butikkutvikling | Education | 1991 |
| AS Eikhi | Wholesale & retail | 1977 |
| AS Gemini | Professional & scientific | 1987 |
| Asi Elektro AS | Construction | 2023 |
| Aske Kapital AS | | 2025 |
| Askeladden Kapital AS | | 2026 |
| Askeladden Trepleie AS | Agriculture & fishing | 2024 |
| Aspervik Eiendom AS | Real estate | 2006 |
| Assitt Invest AS | | 2020 |
| Astor Industri Eiendom AS | Real estate | 2006 |
| Astri Stangeland Holding AS | | 2025 |
| Atlantic Renhold AS | Administrative & support | 2010 |