| 1 Easy Service AS | Administrative & support | 2023 |
| 1-2-3 Bygg Og Montasjeservice AS | Construction | 2023 |
| 24 Invest AS | Real estate | 2020 |
| 5D Wound Care AS | Education | 2021 |
| 5T Eiendom AS | Real estate | 2025 |
| 67 Nord Eiendom AS | Real estate | 2026 |
| 67 Nord Holding AS | | 2026 |
| 8009 Invest AS | | 2023 |
| A Ringstad Holding AS | | 2025 |
| A Sigerstad Agentur AS | Wholesale & retail | 2021 |
| A&A Eiendom AS | Real estate | 2012 |
| A-Consultservice AS | Professional & scientific | 2026 |
| A-J Invest AS | | 2025 |
| A-Takst Salten AS | Real estate | 2022 |
| A. Jensen AS | Agriculture & fishing | 2012 |
| A. Kellners Blomster AS | Wholesale & retail | 2004 |
| Aab Nord Invest AS | Transport & logistics | 2003 |
| Aag Trafikkskole AS | Education | 2015 |
| Aage Iversen Invest AS | Manufacturing | 2005 |
| Aasheim-Invest AS | Financial services | 2008 |
| Aasjord Invest AS | | 2026 |
| Aasland Holding AS | Wholesale & retail | 2005 |
| Abc-Møbler AS | Wholesale & retail | 2014 |
| Abc-Møbler Holding AS | Real estate | 2014 |
| Abelco AS | Real estate | 2002 |
| Abelsen Eiendom AS | Real estate | 2025 |
| Abelsen Invest AS | | 2022 |
| Abook AS | Information & communication | 2024 |
| Absolutt Bygg. AS | Construction | 2021 |
| Ac DC1 AS | Information & communication | 2019 |
| Acea Development AS | Real estate | 2013 |
| Acea Drift AS | Real estate | 2021 |
| Acea Invest AS | | 2020 |
| Acea Properties AS | Real estate | 2012 |
| Acrylicon Nord-Norge AS | Construction | 1994 |
| Action Eiendom AS | Real estate | 2024 |
| Action Holding AS | Real estate | 2024 |
| Adaptive Horizons Tech Solutions B.V. Nuf | Professional & scientific | 2026 |
| Adhd Ressurssenter AS | Education | 2024 |
| Adminor AS | Professional & scientific | 1999 |
| Adminpartner AS | Professional & scientific | 2012 |
| Adnirom 1 AS | Hospitality | 2017 |
| Adriana Ochoa AS | Health & social care | 2017 |
| Advokat Bjørn Kristian Storli AS | Professional & scientific | 2025 |
| Advokat Dag Berntsen AS | Professional & scientific | 2013 |
| Advokat Einar Brunes AS | Professional & scientific | 2020 |
| Advokat Finn Ove Smith AS | Professional & scientific | 2005 |
| Advokat Frank Ove Kvalvik AS | Professional & scientific | 2014 |
| Advokat Kjell-Arne Mathisen AS | Professional & scientific | 2016 |
| Advokat Mads Torrissen AS | Professional & scientific | 2005 |
| Advokat Olav Martin Jentoft JR AS | Professional & scientific | 2004 |
| Advokat Ole Morten Husmo AS | Professional & scientific | 2005 |
| Advokat Ringkjøb AS | Professional & scientific | 2020 |
| Advokat Wiik Johansen AS | Professional & scientific | 2007 |
| Advokaten AS | Professional & scientific | 2017 |
| Advokatfirmaet Aga AS | Professional & scientific | 2020 |
| Advokatfirmaet Aga Eiendom AS | Real estate | 2015 |
| Advokatfirmaet Nyheim AS | Professional & scientific | 2005 |
| Advokatfirmaet Ræder Breivoll AS | Professional & scientific | 2025 |
| Advokatfirmaet Tor Haug AS | Professional & scientific | 2007 |
| Ae.Invest AS | | 2024 |
| Aegir Sailing AS | Professional & scientific | 2024 |
| Aem Umbrella Corp AS | Construction | 2023 |
| Aerotech AS | Manufacturing | 1989 |
| Affectum AS | Professional & scientific | 2005 |
| Aga Invest AS | Financial services | 2005 |
| Aga-Mat Eiendom AS | Manufacturing | 2007 |
| Agamat AS | Manufacturing | 2017 |
| Agiré AS | Professional & scientific | 2025 |
| Aho AS | Manufacturing | 2011 |
| Aidn AS | Information & communication | 2021 |
| Aidn Holding AS | Information & communication | 2022 |
| Aimi Helen AS | Real estate | 2019 |
| Aimi Helen Løvold AS | Real estate | 2018 |
| Airside Innovation AS | Information & communication | 2017 |
| Aito Holding AS | | 2024 |
| Aj Finans AS | Real estate | 2008 |
| Ajam Holding AS | Professional & scientific | 2022 |
| Ajam Media AS | Professional & scientific | 2022 |
| Ajs Invest & Consulting Nuf | Real estate | 2007 |
| Ak Nord AS | Construction | 2020 |
| Ak Nyheim Holding AS | | 2024 |
| Ak-Kronlia Holding AS | | 2024 |
| Aka Eiendom AS | Real estate | 2019 |
| Akeleye AS | Real estate | 2008 |
| Akeleye Icare AS | Information & communication | 2021 |
| Akl AS | Professional & scientific | 2020 |
| Akolberg Holding AS | Real estate | 2020 |
| Akonnect AS | Wholesale & retail | 2008 |
| Aktiva Revisjon Breiland AS | Professional & scientific | 2015 |
| Akvatik AS | Professional & scientific | 2013 |
| Akvatisk AS | Professional & scientific | 2013 |
| Akvilon Fonn AS | Professional & scientific | 2026 |
| Akvilon Holding AS | | 2026 |
| Akvion AS | | 2025 |
| Al Eiendom AS | | 2021 |
| Al Invest AS | Real estate | 2016 |
| Albrigtsen AS | | 2022 |
| Alex Haug AS | Transport & logistics | 2025 |
| Alfheim Holding AS | Real estate | 2005 |