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| Billerud Norway AS | Oslo | 2022 |
| Billerud Rockhammar AB Nuf | Se-718 81 Frövi | 2025 |
| Billerud Skog & Industri Aktiebolag Nuf | Se-801 81 Gävle | 2025 |
| Bilvaskpartner AS | Bryne | 2011 |
| Bilwinco | Dk-9800 Hjørring | 2023 |
| Bim Kemi Sweden | Drammen | 2013 |
| Bim Norway AS | Drammen | 1990 |
| Binn AS | Bodø | 2022 |
| Binroller AS | Ostereidet | 2020 |
| Bio Jæren AS | Porsgrunn | 2022 |
| Bio Solution AS | Froland | 2026 |
| BIO3 AS | Averøy | 2015 |
| Biobag International AS | Askim | 1993 |
| Bioco AS | Hærland | 2008 |
| Bioconstruct GmbH | De-49328 Melle | 2026 |
| Biocontrol AS | Rakkestad | 1991 |
| Biocotech AS | Paradis | 2008 |
| Bioentreprenør AS | Mo I Rana | 2007 |
| Bioform AS | Sørreisa | 2000 |
| Biofuel Holding AS | Nesoddtangen | 2016 |
| Biofyr.No AS | Kristiansand S | 2014 |
| Biogrid AS | Fornebu | 2015 |
| Biomangfold Landbruk SA | Hønefoss | 2021 |
| Biomar A.S. | Myre | 1986 |
| Biomega Group AS | Bergen | 2000 |
| Biomega Norway AS | Skogsvåg | 2001 |
| Bion Group AS | Ølen | 2019 |
| Bion Norge AS | Ølen | 2019 |
| Bionutrients AS | Skjeberg | 2025 |
| Bionutritent AS | Tranby | 2026 |
| Bioparsell AS | Fyllingsdalen | 2024 |
| Biopharma AS | Rolvsøy | 2000 |
| Bioretur Holding AS | Nesttun | 2014 |
| Biosan AS | Rolvsøy | 1995 |
| Biosirk Norge AS | Ingeberg | 1968 |
| Biotec Betaglucans AS | Tromsø | 2010 |
| Biral Lubricants Norway AS | Sandvika | 1971 |
| Birdhouse Da | Molde | 2015 |
| Birger Hatlebakks Veg 15 AS | Molde | 2000 |
| Biri AS | Billingstad | 2004 |
| Biri Maskin Og Service AS | Biristrand | 2024 |
| Biri Møbler AS | Biristrand | 2013 |
| Biri Snekkeri Steinstad Og Steinstad Ans | Biristrand | 2002 |
| Biri Tapet AS | Biri | 2006 |
| Biristrand Vedproduksjon AS | Lillehammer | 2024 |
| Birkebeiner AS | Slidre | 1998 |
| Birkebeiner Minikonditori AS | Lillehammer | 2025 |
| Birkedalsveien 31 AS | Søgne | 2008 |
| Birkeland Bruk Trelast AS | Lyngdal | 2003 |
| Bison Consulting AS | Paradis | 2004 |
| Bitihengeren AS | Jarfjord | 2014 |
| Bizziprops AS | Sem | 2025 |
| Bjarne Espe Trevarefabrikk AS | Nordfjordeid | 2005 |
| Bjarne Flønes AS | Meldal | 1982 |
| Bjarne Fredriksen AS Tannteknisk Laboratorium | Fredrikstad | 1988 |
| Bjarne Holen AS | Mandal | 1978 |
| Bjarne Hopen Verksted AS | Kolvereid | 1991 |
| Bjartmar AS | Loddefjord | 2006 |
| Bjergin Eiendom AS | Rindal | 2006 |
| Bjerka Sandindustri AS | Bjerka | 2010 |
| Bjerke Interiør Design AS | Oslo | 2019 |
| Bjerke Spekemat & Delikatesse AS | Helgeroa | 1990 |
| Bjerks Trevarefabrikk AS | Sandnes | 1977 |
| Bjerring Smedie Og Stålmontage | Dk-8850 Bjerringbro | 2013 |
| Bjertnæs Sag AS | Jevnaker | 1981 |
| Bjervamoen Trevare AS | Lunde | 2019 |
| BJOA SAUM ANS Berit Knutsen Herborg Fosse og Eva Tveitaskog | Bjoa | 1991 |
| Bjoland AS | Skjoldastraumen | 2024 |
| Bjorhaugsletta 11 AS | Nærbø | 2018 |
| Bjorli Fjellmat AS | Bjorli | 1999 |
| Bjøra Eiendom AS | Espa | 2017 |
| Bjørgen Holding AS | Sætre | 1984 |
| Bjørgen Motor & Mekaniske AS | Mathopen | 2013 |
| Bjørgs Silketrykk Da | Årdalstangen | 1989 |
| Bjørgum Mekaniske AS | Voss | 2000 |
| Bjørgvin Therapeutics Group AS | Loddefjord | 2024 |
| Bjørka - Søtt Fra Sparbu AS | Steinkjer | 2026 |
| Bjørkebekk Sveis & Rep AS | Aremark | 2020 |
| Bjørkedalsbåt AS | Folkestad | 2016 |
| Bjørkemar Construction & Consulting BCC AB | Se- 261 35 Landskrona | 2016 |
| Bjørken AS | Kolsås | 1990 |
| Bjørkestøl Maskinservice AS | Brekkestø | 2016 |
| Bjørkhagen AS | Oslo | 2022 |
| Bjørklund Mek Verksted AS | Mo I Rana | 1996 |
| Bjørkås Holding AS | Mosby | 2023 |
| Bjørløw AS | Galterud | 2024 |
| Bjørn Gjertsen AS | Fredvang | 1993 |
| Bjørn Hesbråten AS | Sagstua | 1991 |
| Bjørn Kristiansen Mek Verksted AS | Averøy | 1989 |
| Bjørnafjorden Vedsentral AS | Søfteland | 2022 |
| Bjørnefjord Tre AS | Eikelandsosen | 2001 |
| Bjørnenakk AS | Folkestad | 2005 |
| Bjørnevik Service AS | Andebu | 2014 |
| Bjørnhjell Maskinservice AS | Grøa | 2019 |
| Bjørnholmen AS | Kvamsøy | 2023 |
| Bjørnholmen Holding AS | Kvamsøy | 2023 |
| Bjørnsen Holding AS | Sandnes | 1966 |
| Bjørnstad Holding AS | Mandal | 2012 |
| Bjørnstad Sag Da | Hedalen | 2018 |