| Andresen Kapital AS | | 2025 |
| Andresen Kiropraktikk AS | Health & social care | 2025 |
| Andresen Maskin AS | Wholesale & retail | 2003 |
| Andresen Og Sønn AS | Construction | 2002 |
| Andreus Shop Limited | Wholesale & retail | 2021 |
| Andrew Holding AS | | 2023 |
| Andrews Granite AS | Wholesale & retail | 2022 |
| Andriana Invest AS | Professional & scientific | 2020 |
| Andrikken Eiendom AS | Real estate | 1990 |
| Andrily Holding AS | Real estate | 2008 |
| Andrisen Invest AS | | 2024 |
| Andritz AB | Manufacturing | 1995 |
| Andromeda Barnehage AS | Education | 2022 |
| Andromeda Invest AS | | 2020 |
| Andromeda RB AS | Professional & scientific | 2020 |
| Andropia AS | Information & communication | 2017 |
| Andrroy AS | | 2022 |
| André Koot AS | Arts & recreation | 2021 |
| André Selskaper AS | Information & communication | 2022 |
| Andslimoen Eiendom AS | Real estate | 2002 |
| Andsverdahl AS | | 2020 |
| Andtek AS | Professional & scientific | 2024 |
| Andtor AS | Real estate | 2008 |
| Andtor Holding AS | | 2025 |
| Andungen AS | | 2023 |
| Andvord AS | Real estate | 2006 |
| Andvord Drift AS | Real estate | 2008 |
| Andvord Eiendom AS | Real estate | 2006 |
| Andvord Invest AS | Real estate | 2006 |
| Andvordgruppen AS | Manufacturing | 2006 |
| Andy AS | Financial services | 2002 |
| Andy Holding AS | Construction | 1990 |
| Andy Invest AS | | 2025 |
| Andy's Business AS | Information & communication | 2020 |
| Andy's IT Management AS | Information & communication | 2020 |
| Andygroup AS | Construction | 2014 |
| Andys Pubdrift AS | Hospitality | 2004 |
| Andøl Holding AS | | 2025 |
| Andøya Havn AS | Real estate | 2025 |
| Ane Hjort Guttu AS | Arts & recreation | 2020 |
| Ane Olrud AS | Professional & scientific | 2026 |
| Ane.Fin AS | Information & communication | 2022 |
| Aneca AS | Financial services | 2013 |
| Aneco AS | Real estate | 1994 |
| Anegada AS | Real estate | 2017 |
| Aneh AS | Construction | 2022 |
| Anekdote Film AS | Information & communication | 2013 |
| Aneke Holding AS | Professional & scientific | 2024 |
| Aneli AS | Wholesale & retail | 2004 |
| Anelsen AS | Professional & scientific | 2005 |
| Anem AS | Financial services | 2005 |
| Anemone Studio AS | Professional & scientific | 2011 |
| Aneng AS | Real estate | 2010 |
| Aneo Build AS | Professional & scientific | 2019 |
| Anepane AS | Arts & recreation | 2006 |
| Aner Invest AS | Financial services | 2015 |
| Anes Bygg Og Bad AS | Construction | 2023 |
| Aneste Drift AS | Health & social care | 2016 |
| Aneste Holding AS | Health & social care | 2013 |
| Anestesi Og Smertebehandling AS | Health & social care | 2020 |
| Anestesi-Tjenester AS | Health & social care | 1991 |
| Aneta Florkowska AS | Wholesale & retail | 2019 |
| Anette Berg Holding AS | Health & social care | 2009 |
| Anette Hellem Invest AS | | 2024 |
| Anettes AS | Real estate | 2007 |
| Anew Konsulting AS | Professional & scientific | 2017 |
| Anew Kontor AS | Professional & scientific | 2025 |
| Anf Holding AS | | 2022 |
| Anfield.Eu AS | Administrative & support | 2017 |
| Ang AS | Information & communication | 2000 |
| Ang Invest AS | Financial services | 2009 |
| Anga Consulting AS | Professional & scientific | 2021 |
| Anga Kapital AS | Financial services | 2007 |
| Anga Kraft AS | Energy | 2012 |
| Ange Invest AS | | 2018 |
| Angel Challenge Syndicate Oizom AS | Financial services | 2018 |
| Angela International Da | Professional & scientific | 2003 |
| Angelina AS | Real estate | 2013 |
| Angelina Holding AS | | 2023 |
| Angelis AS | Information & communication | 2026 |
| Angelito Invest AS | | 2024 |
| Angelo Partner AS | Professional & scientific | 2008 |
| Angelskår & Co. AS | Education | 2025 |
| Angeltveit Kapital AS | | 2023 |
| Angenovo AS | Professional & scientific | 2019 |
| Anger AS | Health & social care | 2026 |
| Angermo Byggmester Og Rørleggerservice AS | Construction | 2023 |
| Angermo Byggmester Og Rørservice AS | Construction | 2017 |
| Angermo Holding AS | Construction | 2022 |
| Anghel Turbuss AS | Transport & logistics | 2016 |
| Angkor AS | Professional & scientific | 2007 |
| Angkor Holding AS | | 2017 |
| Angleterre Interiør AS | Wholesale & retail | 2015 |
| Angon AS | Information & communication | 2020 |
| Angry Moose Industries Da | Manufacturing | 2009 |
| Angst AS | Arts & recreation | 2016 |
| Angstbar AS | Hospitality | 2021 |
| Angstklinikken AS | Health & social care | 2021 |
| Angus Rekruttering AS | Administrative & support | 2026 |
| Angus SA | Other services | 1996 |