| Balder Brygg AS | Sogndal | 2011 |
| Balder Festklar AS | Lierskogen | 2023 |
| Baldr Innovasjon AS | Norheimsund | 2025 |
| Balholm AS | Balestrand | 2006 |
| Balholmbygget AS | Balestrand | 2018 |
| Balikesir Elektromekanik Sanayi Tesisleri Anonim Sirketi | Tr-10100 Balikesir | 2020 |
| Balkan Bakeri AS | Sandnes | 2023 |
| Ballangen Autosenter AS | Ballangen | 2015 |
| Ballograf AB | Se-426 52 Västra Frölunda | 2015 |
| Ballstad Fisk AS | Ballstad | 1997 |
| Ballstad Holding AS | Ballstad | 2019 |
| Ballstad Slip AS | Ballstad | 1997 |
| Baltic Montage Sia (Ltd) | Lv-1009 Riga | 2022 |
| Baltic Weid Ou | Ee-40232 Ida-Virumaa | 2019 |
| Baltijos Suvirinimo Sprendimai, MB | Lt-94217 Klaipeda | 2022 |
| Baltzer Holding AS | Tjøme | 2005 |
| Bama Industri AS | Tranby | 1996 |
| Bamatex AB | Se-504 64 Borås | 2020 |
| Bambosa AS | Arendal | 2019 |
| Bamek AS | Ballangen | 1986 |
| Bamsrudlåven AS | Mysen | 2014 |
| Banarsi Norway AS | Oslo | 2024 |
| Bandak AS | Lunde | 1984 |
| Bandak NCT AS | Notodden | 2017 |
| Banegjerde AS | Ås | 2015 |
| Bangs Hardmetall AS | Kopervik | 2016 |
| Bano AS | Sandane | 1999 |
| Baos Holding AS | Oslo | 2025 |
| Barchip Emea Limited Nuf | Dublin | 2010 |
| Bardu Lysstøperi Da | Bardu | 2004 |
| Bardus Saus AS | Bergen | 2021 |
| Bardutre AS | Bardu | 1989 |
| Bare Brød AS | Gjøvik | 2012 |
| Bare Bucha AS | Kråkerøy | 2026 |
| Bare Ice Cream AS | Haugesund | 2025 |
| Bare Naturlig AS | Ås | 2019 |
| Barel AS | Kirkenes | 1993 |
| Barents Clean Ammonia AS | Sandnes | 2025 |
| Barents Metall Og Sveis AS | Kirkenes | 2019 |
| Barents Skipsservice AS | Båtsfjord | 2005 |
| Barfi & Co. AS | Fornebu | 2012 |
| Barfot Keramikk AS | Stavanger | 2013 |
| Bargaintec Da | Ørsta | 2003 |
| Barilla Sverige AB | Se-113 43 Stockholm | 2024 |
| Barkestad Plastindustri AS | Sortland | 2021 |
| Barnehageprodukter AS | Bjelland | 2004 |
| Barnetekniske AS | Drammen | 2007 |
| Barnwood AS | Eikangervåg | 2016 |
| Baro Technology AS | Ulsteinvik | 2014 |
| Barogården Holding AS | Selbu | 2018 |
| Barra AS | Oslo | 1973 |
| Barrbrygger Companiet Ans | Bøstad | 2010 |
| Barry Nimmons Ltd | Ross-Shire Iv19 1Ae Scotland | 2019 |
| Bart-Ar Arkadiusz Bartkow | 08-530 Deblin | 2011 |
| Bartec AS | Sandnes | 1999 |
| Bartosz Kindler Energia Odnawialna | Pl-46-320 Prezedmosc | 2024 |
| Baruch AS | Kristiansand S | 2025 |
| Basel AS | Skien | 2005 |
| Basf AS | Oslo | 1917 |
| Bassaire Limited | Hamshire So31 1Zs | 2014 |
| Bassengteknikk AS | Meistervik | 2026 |
| Bast Investment Group AB Nuf | Se-118 56 Stockholm | 2024 |
| Bastal AS | Førde | 2005 |
| Batteribanken AS | Indre Arna | 2020 |
| Battery Management Systems AS | Hvalstad | 1998 |
| Battreco AB | Klavestadhaugen | 2000 |
| Bauer Trading China Holding AS | Aksdal | 2008 |
| Bauer-Nilsen AS | Haugesund | 2018 |
| Bauer-Nilsen Holding AS | Haugesund | 1925 |
| Baug Boats AS | Deknepollen | 2021 |
| Bauge Eiendom AS | Florø | 1974 |
| Bauta Construction AS | Skåla | 1989 |
| Bauta Group AS | Tomrefjord | 2009 |
| Bauta Industries AS | Skåla | 1996 |
| Bauta Maritime AS | Tomrefjord | 2018 |
| Baxt Lierne AS | Sørli | 2017 |
| Bayer Consumer Care AG | Ch-4052 Basel | 2016 |
| BB Capital AS | Vestskogen | 2005 |
| BB Service V/Benny H. Bach | Dk-8940 Randers Sv | 2019 |
| BBB System AS | Oslo | 2011 |
| BBV 0709 Pulverlakk AS | Helgeroa | 2022 |
| BC Holding Invest AS | Bergen | 2022 |
| BC Produksjon AS | Horten | 2022 |
| BC Vedlikehold AS | Kristiansund N | 2013 |
| BCS Høyanger AS | Blomsterdalen | 2022 |
| BDM Maritime Insulation Nuf | 83-330 Pepowo, Commune Zukowo | 2010 |
| Be-St Snekkerverksted Ans | Drøbak | 1991 |
| Be-To Produkter Da | Skogbygda | 2002 |
| Bea Jewellery AS | Stavanger | 2021 |
| Bea Mek Verksted AS | Rakkestad | 2008 |
| Beau Norge Ans | Tønsberg | 2001 |
| Bebel Fabrikker AS | Espeland | 1925 |
| Becher-Larsen Rig Work's AS | Duken | 2024 |
| Bechmann Strømmen AS | Tønsberg | 2021 |
| Beck Asset Management AS | Sandefjord | 2006 |
| Beck Topco II AS | Sandefjord | 2024 |
| Becker Media AS | Asker | 2008 |
| Beckman Coulter AB | Se-171 54 Solna | 2008 |
| Beckmann Og Toppe Ans | Oslo | 1997 |
| Beckstrøms Gravering AS | Heimdal | 2001 |