| 247 Bolig AS | Real estate | 2026 |
| 721 Invest AS | Financial services | 2016 |
| A-W Invest AS | Financial services | 2017 |
| Aafos Holding AS | Real estate | 1985 |
| Abc Anlegg & Ingeniør AS | Construction | 2012 |
| Able Products AS | Wholesale & retail | 1991 |
| Active Fysioterapi Og Manuellterapi AS | Health & social care | 1996 |
| Activity Consult Foldvik & Andersen AS | Professional & scientific | 2000 |
| Advokat Sjåvik Holding AS | Professional & scientific | 2020 |
| Aec AS | Hospitality | 2024 |
| Aem Tenura AS | | 2021 |
| AG Jacobsen Holding AS | | 2024 |
| Aig Konstruktsjon AS | Construction | 2023 |
| Ais Rescue AS | Information & communication | 2020 |
| Aker Seil AS | Manufacturing | 1988 |
| Aks Invest AS | Wholesale & retail | 2023 |
| Alaw Holding AS | | 2022 |
| Alba Investment AS | Transport & logistics | 2011 |
| Albedo AS | | 2025 |
| Aleppo Cafe & Lunch AS | Hospitality | 2020 |
| All Trust Forsikring AS | Professional & scientific | 2019 |
| Alta Mar Holding AS | | 2022 |
| Alu-Supply Norway AS | Wholesale & retail | 2016 |
| Amb Consulting AS | Professional & scientific | 2023 |
| Anders Knutsen Dagligvare AS | Wholesale & retail | 2004 |
| Anders Knutsen Holding AS | Wholesale & retail | 2005 |
| Andersen & Bakke Entreprenørforretning AS | Construction | 1990 |
| Andrup Design AS | Professional & scientific | 1997 |
| Angoline Holding AS | | 2026 |
| Angstportalen AS | Education | 2023 |
| Anlis AS | Real estate | 2004 |
| Annowi AS | Other services | 2023 |
| Apikal Dominans AS | | 2017 |
| Apollo Sandefjord AS | Real estate | 2021 |
| Arcitech AS | Administrative & support | 2024 |
| Areal-Invest AS | Real estate | 2011 |
| Arian Holding AS | Hospitality | 2005 |
| Artin' S Car AS | Wholesale & retail | 2021 |
| Arvid Lysgård AS | Real estate | 2020 |
| AS Glass-Rønning | Construction | 1987 |
| AS Glottis | Health & social care | 1988 |
| AS Gimle | Real estate | 1966 |
| AS Saturn | | 1962 |
| Askepott Ans | | 1990 |
| Askjem Invest AS | Real estate | 2020 |
| Astoria Hagesenter AS | Wholesale & retail | 1994 |
| Autoshine Car AS | Other services | 2023 |
| Avaritia AS | Financial services | 2012 |
| Aventia Media AS | Information & communication | 2011 |
| Aventia Media Holding AS | | 2026 |
| Avenza AS | Wholesale & retail | 2025 |
| Avita Innovation AS | Professional & scientific | 2010 |
| Awinco AS | | 2018 |
| Aws Bygg Og Bolig AS | Construction | 1987 |
| Axile AS | Information & communication | 2026 |
| Axy AS | Information & communication | 2026 |
| B&H Holding AS | Agriculture & fishing | 2017 |
| Baba Snekkerservice | | 2023 |
| Bakke Mur Og Varme AS | Construction | 2011 |
| Ballari Holding AS | | 2023 |
| Balto Holding AS | | 2024 |
| Banjo Holding AS | | 2021 |
| Baron Vestfold AS | Hospitality | 2013 |
| Bay Eiendom AS | Construction | 2005 |
| Beckmann Invest AS | | 2023 |
| Bedrehuset AS | Education | 2014 |
| Bedriftspartner AS | Professional & scientific | 1997 |
| Befa Bygg AS | Construction | 2002 |
| Bekkeløkka Bolig AS | Real estate | 2024 |
| Belle Enfant AS | Wholesale & retail | 2019 |
| Bellevue Helsesenter AS | Health & social care | 2014 |
| Bellevue Tannhelse AS | Health & social care | 2026 |
| Berganåsen Eiendom AS | Construction | 2017 |
| Berget Invest AS | Wholesale & retail | 2010 |
| Bergh Watches Nordic AS | Wholesale & retail | 2024 |
| Bertrand AS | Professional & scientific | 2010 |
| Best Trade Deal AS | Professional & scientific | 2019 |
| Betek Consult AS | Education | 1998 |
| Betek Holding AS | Wholesale & retail | 2024 |
| Bettina AS | Other services | 2020 |
| Bewa Invest AS | | 2007 |
| Bitsector AS | Information & communication | 2015 |
| Bjarkø Eiendom AS | Real estate | 1990 |
| Bjertnæs & Hoel AS | Agriculture & fishing | 2005 |
| Bjertnæs & Hoel Eiendom AS | Real estate | 2019 |
| Bjurtech Holding AS | | 2023 |
| Bjønnes Slektsgård AS | Real estate | 2018 |
| Bjønness Installasjon AS | Professional & scientific | 2023 |
| Bjørn Johnsen Eiendom AS | | 2005 |
| Bjørnsdottir AS | Other services | 2022 |
| Bjørnson Holding AS | Real estate | 2020 |
| Black Table AS | Information & communication | 2026 |
| Blekksprut Reklame AS | Professional & scientific | 2019 |
| Blikkenslager Jørnsen AS | Construction | 2023 |
| Bliss Coaching & Consulting AS | Administrative & support | 2019 |
| Bluefin Invest AS | Professional & scientific | 2021 |
| Bo-Bo Invest AS | Real estate | 1997 |
| Bobilmeglern AS | Administrative & support | 2020 |
| Bobron Holding AS | | 2026 |
| Bodsentralen AS | Construction | 2014 |