| Alfheims Pengebinge AS | Financial services | 2016 |
| Alfr Nilsson AS | Real estate | 1964 |
| Alfreds Elektroservice AS | Construction | 2000 |
| Alitta Materials AS | | 2025 |
| Alleno AS | Arts & recreation | 2014 |
| Allright AS | Wholesale & retail | 2009 |
| Alrutech AS | Professional & scientific | 2016 |
| Alsgård Fus Barnehage AS | Education | 2018 |
| Alst Eiendom AS | Real estate | 2009 |
| Alstad Fysioterapi AS | Health & social care | 2020 |
| Alstad Legesenter AS | Health & social care | 2012 |
| Alstad Maskin AS | Construction | 2015 |
| Alstad Maskin Eiendom AS | Construction | 2015 |
| Alstad Maskin Holding AS | Construction | 2015 |
| Alstad Naturstein AS | Real estate | 2016 |
| Alt Til Festen AS | Administrative & support | 2025 |
| Altitude Insight AS | Information & communication | 2025 |
| Amandas Hudpleie AS | Other services | 2024 |
| Ambika & Mehus AS | Health & social care | 2023 |
| Ambrosius Eiendom AS | Wholesale & retail | 2023 |
| Amedia Annonse Nord AS | Professional & scientific | 2022 |
| Amedia Trykk Bodø AS | Manufacturing | 2016 |
| Amh Eiendom AS | Real estate | 2021 |
| Amholding AS | | 2021 |
| Amj Capital AS | Hospitality | 2005 |
| Amj Eiendom AS | Real estate | 2009 |
| Amj Garanti AS | Hospitality | 2019 |
| Amj Management AS | Professional & scientific | 2010 |
| Amj Service AS | Other services | 2005 |
| Amo Holding AS | Hospitality | 2014 |
| Amu Utvikling AS | Real estate | 2026 |
| Amundsen Eiendom AS | Real estate | 1988 |
| Amundsen Holding Bodø AS | Administrative & support | 2014 |
| Amundsen Maskin AS | Administrative & support | 2014 |
| Amundsen Rør AS | Construction | 2013 |
| Ancile AS | | 2022 |
| Anders Olsen Rådgivning AS | Professional & scientific | 2015 |
| Andersen Elektriske AS | Construction | 2011 |
| Andersen Invest AS | Real estate | 1991 |
| Anderson + Brekke AS | Real estate | 2015 |
| Anderson Eiendom AS | Real estate | 2005 |
| Andersson & Karlsen AS | Construction | 2022 |
| Andreas Skreslett Stenersen AS | Wholesale & retail | 2023 |
| Andreassens Rederi AS | Agriculture & fishing | 2018 |
| André AS | Manufacturing | 2005 |
| Ane Holding AS | Manufacturing | 2017 |
| Angell Advokatfirma AS | Professional & scientific | 2007 |
| Angellsen Holding AS | | 2022 |
| Angryfood AS | Hospitality | 2015 |
| Ankenesveien 1 AS | Real estate | 2024 |
| Ankerlina AS | | 2025 |
| Ankerveien Solutions AS | | 2022 |
| Anki Gerhardsen AS | Arts & recreation | 2018 |
| Ankill Holding AS | | 2020 |
| Anko Bodø AS | Real estate | 2015 |
| Anleggsgartnermester Svein Erik Johansen AS | Administrative & support | 1993 |
| Anmo AS | Real estate | 2017 |
| Annas Grill AS | Hospitality | 2015 |
| Anne Kristin Rødelv AS | Arts & recreation | 2016 |
| Anntro AS | | 2019 |
| Ans Andersen & Telnes | Real estate | 1975 |
| Ans Anderson | Real estate | 1989 |
| Ans Bodø Engrossenter I | Real estate | 1977 |
| Ans Bodø Engrossenter II | Real estate | 1983 |
| Ans Strandvold Industribygg | Real estate | 1987 |
| Anue AS | Professional & scientific | 2018 |
| Apenes Invest AS | | 2020 |
| Apfu Holding AS | | 2023 |
| Apo-Nor AS | Professional & scientific | 2010 |
| Apotrox Aquaculture AS | Professional & scientific | 2024 |
| Appeal Pmu AS | Other services | 2020 |
| Aqua Eiendom AS | Real estate | 2001 |
| Aquapredict AS | Professional & scientific | 2023 |
| Aquasupply AS | Manufacturing | 2023 |
| Arahavde AS | Arts & recreation | 2019 |
| Arbalest AS | | 2024 |
| Arbitrasje AS | Real estate | 2006 |
| Arcas Detailing AS | Other services | 2023 |
| Arctic Apartments AS | Real estate | 2022 |
| Arctic Arena Eiendom AS | Real estate | 2026 |
| Arctic Arena Fotball AS | Real estate | 2025 |
| Arctic Arena Losje 1 AS | Real estate | 2025 |
| Arctic Arena Losje 2 AS | Real estate | 2025 |
| Arctic Arena Losje 3 AS | Real estate | 2025 |
| Arctic Arena Losje 4 AS | Real estate | 2025 |
| Arctic Arena Losje 5 AS | Real estate | 2025 |
| Arctic Arena Losje 6 AS | Real estate | 2025 |
| Arctic Arena Losje 7 AS | Real estate | 2025 |
| Arctic Arena Nord AS | Real estate | 2021 |
| Arctic Arena Næring AS | Real estate | 2025 |
| Arctic Aviation AS | Transport & logistics | 2001 |
| Arctic Bliss AS | Other services | 2026 |
| Arctic Capacity AS | Information & communication | 2018 |
| Arctic Cars AS | Wholesale & retail | 2026 |
| Arctic Clover Invest AS | Financial services | 2017 |
| Arctic Consult AS | Professional & scientific | 1982 |
| Arctic Cruise AS | Administrative & support | 2010 |
| Arctic Eiendomsdrift AS | Real estate | 1993 |
| Arctic Experts AS | Professional & scientific | 2020 |
| Arctic Export Holding AS | | 2024 |