| Bergen Transport- Og Containermateriell AS | Kleppestø | 1992 |
| Bergensvinduet AS | Straume | 2019 |
| Bergersen AS | Nesøya | 1965 |
| Bergma AS | Jar | 1993 |
| Bergman Mekaniske AS | Vangsvik | 2023 |
| Bergmoen Snekkerverksted AS | Rindal | 2007 |
| Bergnordesign AS | Flekkefjord | 1989 |
| Bergoen AS | Selje | 2021 |
| Bergrose Holding AS | Moelv | 2012 |
| Bergs Fisk AS | Svolvær | 2022 |
| Bergsfjord Fiskeriservice AS | Bergsfjord | 1995 |
| Bergshaven Bakeri Og Konditori AS | Grimstad | 2010 |
| Bergstrøm Kjøtt Og Delikatesse AS | Halden | 2001 |
| Bergvent AS | Stryn | 2017 |
| Bergverksgruppen AS | Skjeberg | 1982 |
| Berika AS | Inderøy | 2019 |
| Beritech Tank | Dk-9400 Nørresundby | 2022 |
| Berland Betong AS | Sandnes | 2021 |
| Berle Fisk AS | Berlevåg | 1995 |
| Bernd Lach | Drammen | 2005 |
| Bernd Wirth Industrimontage | De-46286 Dorsten | 2010 |
| Berner Studio AS | Oslo | 2023 |
| Bernhard Olsen AS | Mo I Rana | 1990 |
| Bernt Østhus AS | Trondheim | 2018 |
| Beroa France | 93200 Saint-Denis | 2014 |
| Beros Verktyg Sverige AB Nuf | Oslo | 2025 |
| Berry Norway Containers AS | Moss | 2023 |
| Berry Packaging Norway AS | Kristiansand S | 1998 |
| Berthas Bakerier AS | Fall | 2008 |
| Bertheussen Blikkenslager AS | Sørreisa | 2006 |
| Bertils Verktøysliperi AS | Helle | 2019 |
| Bertolotti Rail S.R.L. | Cap 50063 Figline E Incisa Valdarno | 2021 |
| Bervi AS | Gimse | 2002 |
| Besa Capital AS | Oslo | 2015 |
| Beskadesrein AS | Maze | 2019 |
| Beslagexperten AS | Sannidal | 2009 |
| Beslagfabrikken AS | Arendal | 2011 |
| Bespoke Norway AS | Halden | 2021 |
| Bessaker Marineservice AS | Bessaker | 2014 |
| Besstek AS | Stokke | 1947 |
| Best Fishing Gear AS | Flatraket | 1999 |
| Best Food AS | Kodal | 2009 |
| Best Som Meg Da | Røyken | 2020 |
| Besætt AS | Stavanger | 2020 |
| Betasistemi Societ'A Responsabilitia Limitata | It-36022 Cassola | 2023 |
| Betek AS | Lillehammer | 1987 |
| Betong Og Sand AS | Vanse | 1990 |
| Betong Service AS | Langevåg | 2022 |
| Betong Vest AS | Blomsterdalen | 2017 |
| Betong Øst AS | Kongsvinger | 1996 |
| Betong Øst Pumping AS | Kongsvinger | 2020 |
| Betong Øst Trøndelag AS | Kongsvinger | 2018 |
| Betongelement AS | Snåsa | 2008 |
| Betongflytebrygger AS | Mo I Rana | 1994 |
| Betonghub AS | Tiller | 2024 |
| Betongtett AS | Kleppestø | 2014 |
| Betongting AS | Hokksund | 2023 |
| Betten Maskinstasjon AS | Vågland | 1980 |
| Betula Technology Group AS | Årdal I Ryfylke | 2026 |
| Bev AS | Trondheim | 2020 |
| Bever Marin AS | Sandefjord | 1984 |
| Beverlo AS | Nordfjordeid | 1977 |
| Bewi ASA | Hamarvik | 2020 |
| Bewi Circular Holding AS | Trondheim | 2022 |
| Bewi Insulation Norge AS | Gressvik | 1956 |
| Bewi Norway AS | Hamarvik | 2010 |
| Bewi Packaging Norway AS | Hamarvik | 1980 |
| Bewunder GmbH | De-10117 Berlin | 2026 |
| Beyond the Bean Norge AS | Trondheim | 2006 |
| Beyonder AS | Sandnes | 2016 |
| BF Invest AS | Naustdal | 2006 |
| Bf-Stålbygg AS | Lindesnes | 2007 |
| BG Marine AS | Drammen | 2021 |
| BG Multiservice AS | Ås | 2022 |
| BH Eiendom AS | Kolbu | 1990 |
| BHS Control Systems GmbH & Co. KG | De-87527 Sonthofen | 2021 |
| BHS Europe Norway | 1014At Amsterdam | 2019 |
| Bhs-Sonthofen GmbH | De-87527 Sonthofen | 2021 |
| Bi Sveiseteknikk Og Maskinering AS | Raufoss | 2014 |
| Bia Invest AS | Horten | 2005 |
| Bia Investering AS | Bergen | 2016 |
| Bia Miljø AS | Herdla | 1990 |
| Bianca AS | Mandal | 2018 |
| Bias Trykk AS | Oslo | 1995 |
| Bibbi Design AS | Våle | 2021 |
| Bidne Mek & Sveis AS | Vossestrand | 2002 |
| Biebutikken - Norsk Biutstyr AS | Ytre Arna | 2017 |
| Biek AS | Trondheim | 2012 |
| Bietilæ AS | Vestre Jakobselv | 2026 |
| Bifrost Tug AS | Sagvåg | 2019 |
| Bil Og Hengerservice AS | Hønefoss | 1999 |
| Bil-Demontering Innlandet AS | Skreia | 1994 |
| BIL1DIN AS | Skage I Namdalen | 1988 |
| BIL1DIN Holding AS | Skage I Namdalen | 2022 |
| Bila | Oslo | 2015 |
| Bildstadsmia AS | Steinkjer | 2018 |
| Bildøy Båt Og Motor AS | Kolltveit | 2001 |
| Bilfinger Engineering & Maintenance GmbH | De-46047 Oberhausen | 2025 |
| Bilfinger Isp Poland SP. Z O.O. Nuf | Pl-47-300 Krapkowice | 2005 |
| Bilfinger Norway AS | Porsgrunn | 2005 |