| Anska Holding AS | | 2013 |
| Ansonia AS | Financial services | 2005 |
| Ansvei AS | Real estate | 2007 |
| Antakelig AS | Information & communication | 2026 |
| Antalis AS | Wholesale & retail | 1935 |
| Antam Airbnb AS | Real estate | 2026 |
| Antarctic AS | Real estate | 1973 |
| Antare Technology AS | Professional & scientific | 2024 |
| Antares AS | Information & communication | 2019 |
| Antares Eiendom AS | Real estate | 2020 |
| Antares Group AS | Real estate | 2016 |
| Antares Holding AS | Wholesale & retail | 2019 |
| Antares Hydropower Norway AS | | 2019 |
| Ante AS | | 2015 |
| Ante Holding AS | | 2005 |
| Anteambulo AS | Information & communication | 2024 |
| Anteambulo Nexus AS | | 2025 |
| Antebellum Invest AS | | 2021 |
| Antec Biogas AS | Professional & scientific | 2014 |
| Antec Boo AS | Real estate | 2020 |
| Antek AS | Construction | 2023 |
| Antenna AS | Professional & scientific | 2011 |
| Antenna Produksjon AS | Professional & scientific | 2021 |
| Anter AS | Construction | 2024 |
| Anter Holding AS | Construction | 2024 |
| Anter Midco AS | | 2024 |
| Anteros AS | Administrative & support | 2016 |
| Anteroz Spirits AS | Wholesale & retail | 2019 |
| Anthom AS | Financial services | 2018 |
| Anthon B Nilsen AS | Real estate | 2007 |
| Anthon B Nilsen Investor AS | | 2020 |
| Anthon B Nilsen Norden AS | | 2020 |
| Anthon Eiendom AS | Real estate | 2003 |
| Anthon Eiendom Drift AS | Real estate | 2009 |
| Anthon Walles Vei 20 AS | Real estate | 2018 |
| Anthon Wallesvei 43B AS | Real estate | 2006 |
| Anthonisen Holding AS | | 2019 |
| Anthoume Media AS | Information & communication | 2023 |
| Anti Ansatte AS | Financial services | 2017 |
| Anti AS | Professional & scientific | 2016 |
| Anti Sourdi Holding AS | | 2017 |
| Anti-Kapital Holding AS | | 2019 |
| Antica Eiendom AS | Real estate | 2010 |
| Anticimex Forsikring AB Norsk Avdeling Av Utenlandsk Foretak Nuf | Financial services | 2002 |
| Antico AS | Professional & scientific | 2006 |
| Antidote Drift AS | Hospitality | 2024 |
| Antiform AS | Information & communication | 2026 |
| Antifragile Ventures AS | Professional & scientific | 2023 |
| Antigo AS | Administrative & support | 2019 |
| Antigrade AS | Wholesale & retail | 2018 |
| Antigravity AS | Information & communication | 2018 |
| Antigua Investments AS | Information & communication | 2023 |
| Antilope AS | Education | 2025 |
| Antima Music Group AS | Arts & recreation | 2015 |
| Antima Property AS | Real estate | 2020 |
| Antioch AS | Professional & scientific | 2025 |
| Antipode AS | Real estate | 2020 |
| Antipode Films AS | Information & communication | 2014 |
| Antipodes AS | Information & communication | 2005 |
| Antire AS | Information & communication | 2023 |
| Antire Employeeco AS | | 2025 |
| Antler AS | Professional & scientific | 2018 |
| Antler International AS | Professional & scientific | 2022 |
| Antler Media AS | Information & communication | 2013 |
| Antom Holding AS | Professional & scientific | 2025 |
| Anton & Figlio AS | Professional & scientific | 2025 |
| Anton Jenssens Gate 2 AS | Real estate | 2015 |
| Anton Lied AS | | 1946 |
| Anton Schjøths Gate NR 12 AS | Households | 1923 |
| Anton Schjøthsg 18 AS | Households | 1925 |
| Anton Schjøthsgate 10 AS | Households | 1928 |
| Anton Schjøthsgate NR 16 AS | Real estate | 1924 |
| Anton Schjøthsgt 14 AS | Households | 1924 |
| Anton Walles Vei 34 AS | Real estate | 2003 |
| Antonette Invest AS | Real estate | 2020 |
| Antonietta AS | Hospitality | 2023 |
| Antonio's Catering AS | Hospitality | 2024 |
| Antonispizza AS | Hospitality | 2015 |
| Antonix AS | | 2026 |
| Antonsen Builds Change AS | Professional & scientific | 2025 |
| Antonsen Holding AS | Professional & scientific | 2018 |
| Antoti AS | Real estate | 2011 |
| Antrac Eiendom AS | Real estate | 1996 |
| Antro Invest AS | | 2020 |
| Antrum AS | Health & social care | 2024 |
| Anubis Invest AS | | 2024 |
| Anv Nordic AB Nuf | Financial services | 2022 |
| Anvil AS | Professional & scientific | 2011 |
| Anvil Asset Advisors AS | Professional & scientific | 2015 |
| Anvil Capture Systems AS | Manufacturing | 2025 |
| Anvil Development Partners AS | Real estate | 2025 |
| Anvil Glasses AS | Professional & scientific | 2012 |
| Anvil Hansa AS | Professional & scientific | 2021 |
| Anvil Mezzanine Investor I AS | | 2021 |
| Anvil Northway AS | | 2025 |
| Anvil Real Estate Analytics AS | | 2020 |
| Anvil Resi Investor I AS | Financial services | 2024 |
| Anvil Resi Investor II AS | Real estate | 2026 |
| Anvita AS | Health & social care | 2026 |
| Anvue Holding AS | | 2023 |