| Apoteket Eiendom AS | Real estate | 2005 |
| Apoteket Eiendom Entreprenør AS | Real estate | 1996 |
| Apparatus AS | Professional & scientific | 2016 |
| Apparatus Eiendom AS | Real estate | 2021 |
| Apparatus Group AS | Professional & scientific | 2021 |
| Aquapartner AS | Professional & scientific | 1991 |
| Aquaside Nuf | Administrative & support | 2005 |
| Aranka Shipping AS | Transport & logistics | 2011 |
| ARBEIDSVARSLING1 AS | Construction | 2023 |
| Arctic 1 AS | Professional & scientific | 2016 |
| Arctic Solutions AS | Professional & scientific | 2017 |
| ARCTIC1 Superior Seafood AS | Wholesale & retail | 2016 |
| Arendalsveien 32 Eiendom AS | Real estate | 1994 |
| Arendalsveien Eiendom AS | Construction | 2009 |
| Argi Partner AS | Professional & scientific | 2008 |
| Arne Kristian Viken AS | | 2023 |
| Arne Og Kjell Håland AS | Real estate | 1992 |
| Arne Topland Holding AS | | 2024 |
| Artbook Garden AS | Information & communication | 2022 |
| Arvander AS | Professional & scientific | 1998 |
| AS Byrå-Tjenester | Professional & scientific | 1991 |
| AS Eielsen | Professional & scientific | 2018 |
| AS Grimstad Adressetidende | Information & communication | 1919 |
| AS Holvik Transport & Spedisjon | Transport & logistics | 1971 |
| AS Nymo | Manufacturing | 1946 |
| AS Uglands Rederi | Transport & logistics | 1930 |
| Ash Kompositt AS | Manufacturing | 1987 |
| Asian På Torvet AS | Hospitality | 2012 |
| Ask Capital AS | Real estate | 2018 |
| Askeladden Barnehage AS | Education | 1999 |
| Askeladden Finans AS | Real estate | 2021 |
| Asme Holding AS | | 2026 |
| Astor Fiskeri AS | Agriculture & fishing | 2025 |
| Astrum AS | Wholesale & retail | 2025 |
| Aswo-Norge AS | Wholesale & retail | 2007 |
| Atechs AS | Professional & scientific | 2021 |
| Atm Service AS | Manufacturing | 2012 |
| Auto Rep AS | Other services | 1976 |
| Auto Rep Eiendom AS | Real estate | 2016 |
| Autoco AS | Wholesale & retail | 2012 |
| Autofix AS | Other services | 2003 |
| Autohjelp Holding AS | Real estate | 2007 |
| Automatiser AS | Professional & scientific | 2012 |
| Avior Eiendom AS | Real estate | 2012 |
| Avior Group AS | Real estate | 2000 |
| Avior Invest AS | | 2017 |
| Aviorgården AS | Real estate | 2017 |
| Avix AS | Professional & scientific | 2023 |
| Axnes AS | Manufacturing | 1995 |
| B-K Bygg AS | Construction | 2013 |
| B.T. Kjølsrud Invest AS | | 2022 |
| B.W.B. Holding AS | Financial services | 2005 |
| Ba-Eiendom AS | Real estate | 2002 |
| BAAD1 AS | Manufacturing | 2014 |
| Badelement Norge AS | Wholesale & retail | 2019 |
| Baktus AS | Health & social care | 2013 |
| Bambus Holding AS | | 2022 |
| Barbu Brygge Holding AS | Real estate | 2014 |
| Barstølveien 9 AS | Real estate | 2025 |
| Batavia Eiendom AS | Real estate | 2026 |
| Batavia Holding AS | Real estate | 2008 |
| Beathes Fotpleie AS | Other services | 2024 |
| Beatus Eiendom AS | Real estate | 2005 |
| Bedøk Holding AS | Professional & scientific | 1990 |
| Beisland Holding AS | | 2024 |
| Beisland Skog Ans | Agriculture & fishing | 2012 |
| Belland Solenergi AS | Energy | 2022 |
| Belnor AS | | 2006 |
| Bema AS | Wholesale & retail | 1977 |
| Bendix Kapital AS | Financial services | 2005 |
| Benestvedt Eiendom AS | Wholesale & retail | 2005 |
| Benma Holding AS | Financial services | 2005 |
| Bennett Centrum Reisebyrå AS | Administrative & support | 1986 |
| Bens Salong AS | Other services | 2009 |
| Berg Invest AS | Real estate | 2021 |
| Bergem AS | | 2022 |
| Bergemoen Apotek AS | Wholesale & retail | 2021 |
| Bergemoen Eiendom AS | Real estate | 1992 |
| Bergemoen Syd AS | Real estate | 2017 |
| Bergshav Capital AS | | 2015 |
| Bergshav Eiendom AS | Real estate | 1930 |
| Bergshav Eiendomsutvikling AS | Real estate | 2020 |
| Bergshav Invest AS | Transport & logistics | 1988 |
| Bergshav Management Co AS | Transport & logistics | 2007 |
| Bergshav Product Tankers AS | Transport & logistics | 2006 |
| Bergshav Shipholding AS | Transport & logistics | 1989 |
| Bergshaven AS | Real estate | 1981 |
| Bergshaven Bakeri Og Konditori AS | Manufacturing | 2010 |
| Bergshaven Brygge AS | Real estate | 2005 |
| Bernhard Arnevik AS | | 2023 |
| Best Medical AS | Wholesale & retail | 2026 |
| BGM Arkitekter AS | Professional & scientific | 1994 |
| BHB Norge AS | Professional & scientific | 2021 |
| Bie Apartment Og Feriesenter AS | Real estate | 2004 |
| Bie-Lorentzen Holding AS | Real estate | 2020 |
| Bieheia Honning Ans | Agriculture & fishing | 2025 |
| Bieveien 16 AS | Real estate | 2011 |
| Big Catering Og Event AS | Hospitality | 1996 |
| Bikkja AS | Health & social care | 2013 |
| Bikuben Ans | Education | 2000 |