| 0805 Skr-Holding AS | | 2025 |
| 3H Group AS | Real estate | 2025 |
| 5 Stjerne Bygg AS | Construction | 2026 |
| 69 Bygg AS | Construction | 2018 |
| 7FHOLDING AS | Professional & scientific | 2023 |
| 7FKONSULT AS | Professional & scientific | 2023 |
| A & a Pool AS | Construction | 2014 |
| A&E Consulting AS | Professional & scientific | 2021 |
| A&G Regnskap Og Råd AS | Professional & scientific | 2017 |
| Aa-Vann AS | Water & waste | 2017 |
| Aam Tech Holding AS | Professional & scientific | 2024 |
| Ab&T Eiendomsdrift AS | Administrative & support | 2014 |
| Abra Invest AS | Professional & scientific | 2006 |
| Absolutt Rent AS | Administrative & support | 2024 |
| Acanti Eiendom AS | Real estate | 1951 |
| Adams Butikk AS | Wholesale & retail | 2019 |
| Adkem Nordic AS | Wholesale & retail | 2013 |
| Advira Consulting AS | Information & communication | 2021 |
| Aeh Manuellterapi AS | Health & social care | 2019 |
| Agn Kapital AS | Real estate | 2021 |
| Ahmad & Company AS | Health & social care | 2022 |
| Ahmad Harmouch AS | Construction | 2011 |
| AI Lease AS | Wholesale & retail | 2000 |
| Akershus Fiberoptikk AS | Information & communication | 2017 |
| Aktiv Kjøling AS | Construction | 2007 |
| Alazzi AS | Administrative & support | 2016 |
| Alfa & Omega Eiendom AS | Administrative & support | 1995 |
| Allians Renhold AS | Administrative & support | 2021 |
| Alpha Elektro AS | Construction | 2015 |
| Alpha Holding AS | Construction | 2015 |
| Alpine Swift AS | Wholesale & retail | 2016 |
| Altia Norway AS | Wholesale & retail | 1992 |
| Altimed Ressurs AS | Administrative & support | 2016 |
| Amh-Holding AS | | 2020 |
| Amron Invest AS | | 2023 |
| Anora AS | Wholesale & retail | 2020 |
| Anora Prime Brands AS | Wholesale & retail | 2022 |
| Anora Sweden AB Nuf | Wholesale & retail | 2010 |
| Ar Eiendomsutvikling AS | Real estate | 2020 |
| Arctic Defense AS | Manufacturing | 2014 |
| Arcus Brand Lab AS | Wholesale & retail | 2018 |
| Arcus Co Brands AS | Wholesale & retail | 2019 |
| Arcus Norway AS | Manufacturing | 1995 |
| Arcus Wine Brands AS | Wholesale & retail | 2008 |
| Arcus-Gruppen AS | Manufacturing | 1995 |
| Areal Bygg AS | Construction | 2003 |
| Arild Johansen Transport AS | Transport & logistics | 1982 |
| ARK19 Plan- Og Prosjektutvikling AS | Professional & scientific | 2012 |
| Arkitektbygg AS | Construction | 2020 |
| Arnesen Sánchez Holding AS | Professional & scientific | 2014 |
| Arrange AS | Hospitality | 2012 |
| Arvin AS | Transport & logistics | 2015 |
| AS Skiltfabrikken | Manufacturing | 1967 |
| AS Solregn | Professional & scientific | 1990 |
| Assistenten AS | Information & communication | 1990 |
| Astrid Wanja AS | Arts & recreation | 2018 |
| Astrup Energi Og VVS AS | Professional & scientific | 2025 |
| Astrup Holding AS | Professional & scientific | 2025 |
| Ataraksia Holding AS | | 2021 |
| Atle Hagen AS | Professional & scientific | 2013 |
| Atlungstad Håndverksdestilleri AS | Manufacturing | 2018 |
| Atop AS | Information & communication | 2011 |
| Auke Rør AS | Construction | 2014 |
| Autoindustri AS | Wholesale & retail | 2001 |
| Autopaint AS | Other services | 2015 |
| Autoparts United Norway AS | Wholesale & retail | 2023 |
| Avelta AS | | 2024 |
| Axse AS | Information & communication | 2026 |
| Bakken Renhold AS | Administrative & support | 2004 |
| Barn I Vann AS | Education | 2013 |
| Beam Me Up AS | Information & communication | 2025 |
| Berger Capital AS | | 2022 |
| Berger Capital Holding AS | | 2023 |
| Best Buys International AS | Wholesale & retail | 1996 |
| Best I Frakt AS | Transport & logistics | 2025 |
| Bevco AS | Wholesale & retail | 2006 |
| Beverage Link AS | Transport & logistics | 2019 |
| Bfn-Holding AS | | 2024 |
| Bibendum AS | Wholesale & retail | 1976 |
| Bigstreet Holding AS | Real estate | 2022 |
| Bilxtra Gjelleråsen AS | Other services | 2023 |
| Birkelundveien 66 AS | Real estate | 2012 |
| Bislet Snekker AS | Construction | 1995 |
| Bjertnestangen AS | Real estate | 2010 |
| Bjertnestangen Utvikling AS | Real estate | 2018 |
| Bjørn Backe Holding AS | | 2002 |
| BK Skrenten Invest AS | | 2024 |
| Bottega AS | Wholesale & retail | 2022 |
| Braathen IT AS | Information & communication | 2018 |
| Britisk Bilimport AS | Wholesale & retail | 2018 |
| Buffersoft AS | Information & communication | 2026 |
| Business by Johansen AS | Professional & scientific | 2023 |
| Byggenergi AS | Construction | 2021 |
| Byggenergi Gruppen AS | Construction | 2021 |
| Byggesakspartner AS | Professional & scientific | 2026 |
| Bærum VVS Og Vedlikehold AS | Construction | 2022 |
| Cable Consulting AS | Professional & scientific | 2024 |
| Cafè Stund AS | Hospitality | 2013 |
| Capital Consulting AS | Real estate | 2017 |
| Car & Tec Da | Other services | 2009 |