| 1001 Eventyr AS | Professional & scientific | 2020 |
| 100METERSKOGEN Bolig AS | Real estate | 2021 |
| 10X Agency AS | Professional & scientific | 2021 |
| 11222 Group AS | Information & communication | 2017 |
| 18 Ward AS | Professional & scientific | 2023 |
| 19LFS AS | Professional & scientific | 2021 |
| 1MICADVENTURE Ans | Professional & scientific | 2005 |
| 2020PARK 01 AS | Real estate | 2009 |
| 2020PARK AS | Real estate | 2004 |
| 247 Energy AS | Arts & recreation | 2008 |
| 2CASA AS | Real estate | 2010 |
| 2ND Floor Studio AS | Other services | 2024 |
| 2SST Stavanger AS | Transport & logistics | 2025 |
| 2XMEA Holding AS | | 2026 |
| 30NORTH AS | | 2025 |
| 36 Holmen AS | Real estate | 2005 |
| 3D Norge AS | Professional & scientific | 2015 |
| 3EIENDOM AS | Real estate | 2022 |
| 3LARS AS | | 2024 |
| 3TI Holding AS | | 2020 |
| 4444 Invest AS | Other services | 2016 |
| 5 M Holding AS | Financial services | 2020 |
| 56 North Holding AS | Information & communication | 2022 |
| 5D Vekst AS | Professional & scientific | 2012 |
| 5K International AS | Professional & scientific | 2004 |
| 78 N Gruppen AS | Financial services | 2017 |
| A Braut Invest I AS | Real estate | 2007 |
| A Døhlen AS | Financial services | 2006 |
| A Haugen Holding AS | | 2005 |
| A Husebø Holding AS | | 2024 |
| A Middelthon AS | Real estate | 1982 |
| A Place to Stay Stavanger AS | Hospitality | 2023 |
| A Trip 2 Ans | Administrative & support | 2006 |
| A&J Works AS | Real estate | 2025 |
| A'Head Executive AS | Professional & scientific | 2003 |
| A-Reiser AS | Administrative & support | 1997 |
| A-Sign AS | Manufacturing | 1993 |
| A. Haugen Eiendom AS | Real estate | 2012 |
| A. Idsøe AS | Manufacturing | 2020 |
| A. Idsøe Holding AS | Manufacturing | 1976 |
| A. Larsen Holding AS | Financial services | 2015 |
| A.Iversen Maskin & Agentur AS | | 2020 |
| A.J.Tasta Billakkering AS | Other services | 2023 |
| A.K Invest AS | Health & social care | 2020 |
| A.Nilsen Holding AS | | 2021 |
| A/S Norske Shell | Mining & quarrying | 1912 |
| A/S Skog | Agriculture & fishing | 1919 |
| A2 Holding AS | Education | 2006 |
| A2B Logistics AS | Transport & logistics | 2018 |
| A2KY Ingeniør Konsulent AS | Professional & scientific | 2020 |
| A4 Eiendom AS | Real estate | 2024 |
| Aa Consultantgroup AS | Information & communication | 2022 |
| Aaa TKS AS | Transport & logistics | 2025 |
| Aac Holding AS | Other services | 2022 |
| Aadnesen Invest AS | | 2018 |
| Aadnøy Eiendom AS | Real estate | 1975 |
| Aah AS | | 2024 |
| Aak Energy AS | Manufacturing | 1987 |
| Aak Energy Holding AS | | 2026 |
| Aamannsgården KS | Real estate | 1986 |
| Aamodt Bygg Og Hage AS | Construction | 2021 |
| Aanestad Service AS | Wholesale & retail | 1990 |
| Aarhus Invest AS | | 2024 |
| Aarrestad Jon & Jan Da | Agriculture & fishing | 1996 |
| Aarrinvest AS | | 2012 |
| Aarsand Gruppen AS | | 2023 |
| Aarstad AS | Information & communication | 2025 |
| Aas Consulting AS | Administrative & support | 2024 |
| Aase Hjelp AS | Education | 2018 |
| Aase Investment AS | Real estate | 2006 |
| Aase Ultimate Holding AS | Education | 2018 |
| Aasebø Kompetanse AS | Education | 2016 |
| Aashus Invest AS | Real estate | 2002 |
| Aasland Industrier AS | Financial services | 2005 |
| Aasland Investeringer AS | | 2025 |
| Aastrand Auto AS | Wholesale & retail | 2021 |
| Aastrand Eiendom Holding AS | Real estate | 2024 |
| Aavi Invest AS | | 2019 |
| Aaviksferie Da | Real estate | 2000 |
| AB Subsea Consult AS | Professional & scientific | 2026 |
| AB Systemer AS | Wholesale & retail | 1993 |
| Aba Bistand AS | Professional & scientific | 2025 |
| Abacus AS | Professional & scientific | 2015 |
| Abacus Holdingselskap AS | Professional & scientific | 2015 |
| Abbro Da | Wholesale & retail | 2004 |
| Abc Rådgivning AS | Administrative & support | 2021 |
| Abc Trade AS | Administrative & support | 2020 |
| Abc Transport AS | Transport & logistics | 2023 |
| Abc Turbusser AS | Transport & logistics | 2008 |
| Abel Concept AS | Hospitality | 2022 |
| Abelian AS | | 2025 |
| Abfab AS | Professional & scientific | 2019 |
| Abid Service AS | Transport & logistics | 2022 |
| Abiye AS | Transport & logistics | 2026 |
| Abl Norway AS | Professional & scientific | 1984 |
| Ablny Technologies AS | Information & communication | 2025 |
| Abp Eiendom AS | Real estate | 2018 |
| ABS Service ANS | Administrative & support | 1988 |
| Absurd Arkitektur AS | Professional & scientific | 2020 |
| Absurd Aviation AS | Administrative & support | 2021 |