| Asbjørn Og Tor Eiendom AS | Real estate | 1994 |
| Ask Fysikalske AS | Health & social care | 2023 |
| Aspia AS | Wholesale & retail | 2013 |
| Assa Holding AS | Wholesale & retail | 2010 |
| Atani Ans | Administrative & support | 2000 |
| Audna Bruk AS | Real estate | 1980 |
| Aurantia AS | Agriculture & fishing | 2005 |
| Aurebekk Gartneri AS | Agriculture & fishing | 2005 |
| Avi Eiendom AS | Real estate | 1994 |
| B&G Betongentreprenør AS | Construction | 2019 |
| B&G Stein AS | Mining & quarrying | 2021 |
| B-Team AS | Real estate | 1987 |
| B.M.S Holding AS | | 2018 |
| Back Office AS | Administrative & support | 2014 |
| Bags and Gifts AS | Wholesale & retail | 1998 |
| Balanceatwork AS | Health & social care | 2025 |
| Bam AS | Real estate | 2004 |
| Bap AS | Real estate | 2008 |
| Barcase Holding AS | Real estate | 2026 |
| Bartnes Eiendom AS | Real estate | 2025 |
| Bartnes Utvikling AS | Professional & scientific | 2015 |
| Bedre Invest AS | | 2018 |
| Befu Eiendom AS | Real estate | 2021 |
| Bekkeli Invest AS | Financial services | 2005 |
| Belisi AS | Real estate | 2005 |
| Bergegården Ans | Real estate | 1998 |
| Bergkvist Vatne AS | Professional & scientific | 2021 |
| Berry AS | Professional & scientific | 2018 |
| Best Event Production AS | | 2025 |
| Best Sea View Jomtien Co Ltd | Real estate | 2010 |
| Best Value Experts Scandinavia AS | Professional & scientific | 2021 |
| Bestus AS | | 2014 |
| BHJ Holding AS | | 2025 |
| Bianca AS | Manufacturing | 2018 |
| Bie AS | Administrative & support | 2007 |
| Big Top Holding AS | Hospitality | 2005 |
| Big Top Servering AS | Hospitality | 2022 |
| Bilelektrikeren Mandal AS | Other services | 1996 |
| Bilpartner AS | Wholesale & retail | 1993 |
| Bjarne Holen AS | Manufacturing | 1978 |
| Bjoråsen AS | Professional & scientific | 2026 |
| Bjørkir AS | Real estate | 2014 |
| Bjørnstad Holding AS | Manufacturing | 2012 |
| BK Fisk AS | Agriculture & fishing | 2014 |
| BK Fisk Holding AS | Agriculture & fishing | 2019 |
| BK Motor AS | Real estate | 2017 |
| Blink Trafikkskole Mandal AS | Education | 2015 |
| Blomsterverkstedet AS | Wholesale & retail | 2005 |
| Blørstad Maskindrift AS | Construction | 2018 |
| BM Hotelldrift AS | Hospitality | 2012 |
| Bo Anlegg AS | Construction | 2006 |
| Boex AS | Real estate | 2005 |
| Boligblikk Sør AS | Professional & scientific | 2025 |
| Bolighus AS | Construction | 2008 |
| Bolighus Holding AS | Construction | 2016 |
| Boligspesialisten Glomsaker AS | Construction | 2023 |
| Borshavn Brygge AS | Real estate | 2019 |
| Boutvikling AS | Real estate | 1999 |
| BR. Løge AS | Construction | 2009 |
| BR. Seyffarth AS | Construction | 2021 |
| Brakall AS | Professional & scientific | 2007 |
| Brantor AS | | 2023 |
| Brattholm AS | Agriculture & fishing | 2013 |
| Brave Selections Nord AS | Wholesale & retail | 2025 |
| Breiviga Holding AS | Real estate | 2017 |
| Bringebærhaven Vekst AS | Professional & scientific | 2020 |
| Bringsdal Holding AS | Financial services | 2018 |
| Bro Og Kai Vedlikehold II AS | Construction | 2014 |
| Brogata Eiendom AS | Financial services | 2005 |
| Brogata Invest AS | Real estate | 2006 |
| Bruno AS | Construction | 2015 |
| Brådland Eiendom AS | Administrative & support | 2013 |
| Brødrene Glomsaker AS | Construction | 2013 |
| Brødrene Helle Holding AS | Real estate | 2006 |
| Brødøy Holding AS | Real estate | 2013 |
| BS Takst AS | Real estate | 2019 |
| BSV Eiendom AS | Real estate | 2005 |
| Budie AS | | 2024 |
| Buildr Labs AS | Information & communication | 2023 |
| Busay Sushi AS | Hospitality | 2020 |
| Business Holding AS | | 2025 |
| Butikkdrift Sør Holding AS | Wholesale & retail | 2021 |
| Butikkutvikling Agder AS | Professional & scientific | 2024 |
| Butikkutvikling Sør AS | Professional & scientific | 1994 |
| Buø Research AS | Professional & scientific | 2021 |
| BWK Holding AS | | 2014 |
| Bydahl Holding AS | Construction | 2008 |
| Byggefirma R. Larsen AS | Construction | 2016 |
| Byggefirma Stian Sæveland AS | Construction | 2014 |
| Byggfirma Anders Trondsen AS | Construction | 2014 |
| Byggfirma Erling Klev AS | Construction | 2007 |
| Byggfirma Kåre Rosseland AS | Construction | 2012 |
| Byggfysikk AS | Professional & scientific | 2012 |
| Byggmester Bernt Haaland AS | Construction | 2017 |
| Byggmester Leif Terje Torland AS | Construction | 2005 |
| Byggmester Rune Grimestad AS | Construction | 1998 |
| Bygningsingeniør Svein Klev AS | Financial services | 2005 |
| Bylarsen Holding AS | | 2025 |
| Byporten Holding AS | Real estate | 2010 |
| Berges Elektro A/S | Wholesale & retail | 1988 |