| Angustia Forlag AS | Information & communication | 2013 |
| Anhan AS | Financial services | 2017 |
| Anheuser-Busch Inbev Norway AS | Wholesale & retail | 2018 |
| Anho Invest AS | | 2025 |
| Anhu AS | | 2024 |
| Anhu Holding AS | | 2025 |
| Anibar Invest AS | Real estate | 2005 |
| Anicca Pictures AS | Information & communication | 2018 |
| Anicura AS | Professional & scientific | 2013 |
| Anicura Online AS | Professional & scientific | 2019 |
| Aniki AS | Arts & recreation | 2023 |
| Anikonic AS | Manufacturing | 2021 |
| Anim AS | | 2021 |
| Animal Farm Holding AS | | 2025 |
| Animal Voice Production AS | Information & communication | 1985 |
| Animalia AS | Agriculture & fishing | 2017 |
| Animando AS | Administrative & support | 2025 |
| Animania Ullevaal AS | Wholesale & retail | 2025 |
| Animaskin AS | Professional & scientific | 2016 |
| Animata Holding AS | Wholesale & retail | 2006 |
| Animation AS | Information & communication | 2008 |
| Animatix 1 AS | | 2025 |
| Animo AS | Professional & scientific | 2021 |
| Animo Holding AS | Professional & scientific | 2012 |
| Animol Entertainment AS | Professional & scientific | 2025 |
| Animus Learning School AS | Education | 2018 |
| Animå Da | Professional & scientific | 2005 |
| Anin AS | Real estate | 2020 |
| Anine Kristensen Holding AS | Professional & scientific | 2025 |
| Anisope AS | Real estate | 2013 |
| Anita C Drabløs AS | Professional & scientific | 2026 |
| Anita Christensen Interiør AS | Manufacturing | 2024 |
| Anita Lynne AS | Professional & scientific | 2013 |
| Anita Systems AS | Information & communication | 2017 |
| Anitha Trier Design & Interiørsøm AS | Professional & scientific | 2016 |
| Anj Eiendom AS | Real estate | 2021 |
| Anja Holding AS | Professional & scientific | 2012 |
| Anja Höfer AS | Information & communication | 2023 |
| Anja Nitteberg Holding AS | Wholesale & retail | 2015 |
| Anja Nitteberg Solheim AS | Wholesale & retail | 2016 |
| Anjah Holding AS | | 2019 |
| Anjo Capital AS | | 2025 |
| Anjoro AS | | 2025 |
| Anjos AS | | 2019 |
| Ank Projects AS | Professional & scientific | 2016 |
| Anka AS | Wholesale & retail | 2021 |
| Anka Auto AS | Wholesale & retail | 2017 |
| Anka Renhold AS | Administrative & support | 2023 |
| Ankag AS | Real estate | 2020 |
| Ankenesstrand Servicesenter AS | Real estate | 2000 |
| Anker - Zemer Engineering AS | Information & communication | 2020 |
| Anker Apotek AS | Wholesale & retail | 2012 |
| Anker Byggtakst AS | Real estate | 2011 |
| Anker Hausmann AS | Hospitality | 2023 |
| Anker Holding AS | Health & social care | 2020 |
| Anker Investeringer AS | | 2021 |
| Anker Klinikk AS | Health & social care | 2013 |
| Anker Management Holding AS | Financial services | 2008 |
| Anker Sti Holding AS | Real estate | 2009 |
| Ankerdb AS | Information & communication | 2022 |
| Ankergaarden AS | Real estate | 2021 |
| Ankerhagen AS | Real estate | 2022 |
| Ankerhagen Barnehage SA | Education | 1997 |
| Ankersgate AS | | 2022 |
| Ankertunet AS | Real estate | 2002 |
| Ankerveien 12 AS | Real estate | 2012 |
| Ankerveien 96 AS | Real estate | 2019 |
| Ankiroho AS | Financial services | 2007 |
| Ankr AS | Real estate | 2010 |
| Ankr Invest AS | | 2026 |
| Ankran AS | Construction | 2018 |
| Ankran Entreprenør AS | Construction | 2019 |
| Anksoft AS | Information & communication | 2017 |
| Ankubu AS | | 2022 |
| Anlegg & Maskin Support AS | Manufacturing | 2015 |
| Anlegg Og Eiendomsutvikling AS | Real estate | 2018 |
| Anlegg-Service Ans | | 1991 |
| Anleggservice Øst AS | Construction | 1996 |
| Anleggsmaskin AS | Real estate | 1972 |
| Anleggsservice Øst Eiendom AS | Real estate | 2013 |
| Anma AS | Financial services | 2005 |
| Anmat Invest AS | Professional & scientific | 2016 |
| Anmelder.No AS | Professional & scientific | 2025 |
| Anml AS | | 2025 |
| Anmo Consulting AS | Professional & scientific | 2022 |
| Anmo Holding AS | Real estate | 2022 |
| Ann Kristin Ekra AS | Professional & scientific | 2022 |
| Ann-Kristin Kreutz AS | Administrative & support | 2017 |
| Anna Asset Management AS | Financial services | 2022 |
| Anna Blix AS | Arts & recreation | 2023 |
| Anna Hjellset AS | | 2023 |
| Anna Kamola AS | Wholesale & retail | 2020 |
| Anna Regnskapsbyrå AS | Professional & scientific | 1993 |
| Anna Ringstad AS | Professional & scientific | 2026 |
| Anna-Karin Olander | Education | 2006 |
| Annanker AS | Financial services | 2016 |
| Annant AS | | 2022 |
| Annapoorna Da | Manufacturing | 2025 |
| Annatomi AS | Health & social care | 2022 |
| Anne AS | Financial services | 2005 |