| Bjerknes Bygg AS | Vigra | 1978 |
| Bjerknes Holding AS | Lørenskog | 2005 |
| Bjerkreim & Hansen AS | Haugesund | 2022 |
| Bjerkreim Bygg AS | Vikeså | 2007 |
| Bjerkreim Bygg Holding AS | Vikeså | 2023 |
| Bjerkreim Entreprenør AS | Bjerkreim | 2020 |
| Bjerkreim Holding AS | Bjerkreim | 2022 |
| Bjerkvik Bygg AS | Narvik | 1994 |
| Bjerkvik Maskin AS | Bjerkvik | 2017 |
| Bjerkvoll Bygg AS | Fetsund | 2025 |
| Bjerkås Bygg & Anlegg AS | Sem | 2023 |
| Bjerkås Maskin AS | Sem | 2026 |
| Bjerland Bygg AS | Øvrebø | 2022 |
| Bjerland Holding AS | Øvrebø | 2022 |
| Bjerring Silo Construction | Dk-8850 Bjerringbro | 2011 |
| Bjerve AS | Oslo | 2022 |
| BJM Holding AS | Hauge I Dalane | 2023 |
| BJM Snekkersevice AS | Sjetnemarka | 2014 |
| Bjoa Holding AS | Ølensvåg | 2014 |
| Bjoa Snekkerfirma AS | Bjoa | 2016 |
| Bjor Holding AS | Bjørøyhamn | 2021 |
| Bjordal Og Rikstad Byggservice Da | Ask | 1995 |
| Bjordal-Norheim AS | Sandnes | 2021 |
| Bjordam AS | Stathelle | 2024 |
| Bjorkjendal Holding AS | Vegårshei | 2018 |
| Bjorland Invest AS | Oslo | 2023 |
| Bjornes Bygg AS | Arendal | 2024 |
| Bjorøy Bygg AS | Hardbakke | 2004 |
| Bjorøy Entreprenørforretning AS | Skogsvåg | 1985 |
| Bjorøy Maskin AS | Bjørøyhamn | 2014 |
| Bjorøya Gårdsbruk AS | Rindal | 2024 |
| Bjotveit Holding AS | Ytre Arna | 2022 |
| Bjotveit Maskin Og Transport AS | Nesttun | 2013 |
| BJP Trading Ltd | Gb-Stocton-On-Tees Ts17 0Hu | 2025 |
| Bjune Blås & Bygg AS | Åsgårdstrand | 2021 |
| Bjune Mur & Betong AS | Revetal | 2007 |
| Bjunebygg AS | Tolvsrød | 2016 |
| Bjuneveien 110 AS | Barkåker | 2007 |
| Bjustveit Invest AS | Ombo | 2010 |
| Bjåen Egeland Invest AS | Skien | 2012 |
| Bjålid Anlegg AS | Rauland | 2020 |
| Bjålid Holding AS | Rauland | 2020 |
| Bjånes Maskin AS | Blomsterdalen | 2016 |
| Bjødnalie Infrastruktur AS | Gol | 2007 |
| Bjølsen Rør AS | Oslo | 2020 |
| Bjølsen Rørservice AS | Oslo | 2022 |
| Bjølverud Bygg AS | Isfjorden | 2024 |
| Bjønna AS | Stord | 2005 |
| Bjønnes Fjellservice AS | Brevik | 2021 |
| Bjønness-Bygg 2 AS | Drøbak | 2026 |
| Bjønness-Bygg AS | Drøbak | 1985 |
| Bjørbekk Elektro AS | Skien | 2007 |
| Bjørdal Asfalt AS | Ørsta | 1998 |
| Bjørdal Maskin Anlegg AS | Rovde | 2022 |
| Bjørgan Fjellsprengning AS | Velfjord | 2019 |
| Bjørge Bygg AS | Drammen | 2023 |
| Bjørge Bygg AS | Ellingsøy | 1995 |
| Bjørgen Maskin AS | Hegra | 2023 |
| Bjørgesætra AS | Øyer | 2019 |
| Bjørgum AS | Aurland | 2024 |
| Bjørgvin Bil & Transport AS | Ask | 2018 |
| Bjørgvin Elektro AS | Nesttun | 1998 |
| Bjøringsøy Maskinstasjon AS | Smøla | 2016 |
| Bjørkedal AS | Folkestad | 2020 |
| Bjørken Bygg AS | Hell | 2023 |
| Bjørkeng Anleggsdrift AS | Øverbygd | 2000 |
| Bjørkhaug Investering AS | Hafrsfjord | 2018 |
| Bjørkhaug Maskin AS | Lavik | 1984 |
| Bjørkhaugen AS | Sandeid | 2026 |
| Bjørkli Båt Og Bygg AS | Alta | 2024 |
| Bjørkli Rør AS | Bardu | 2021 |
| Bjørkmo AS | Oslo | 2016 |
| Bjørkmo Bygg AS | Skonseng | 2020 |
| Bjørkmoflata 31 AS | Oppdal | 2023 |
| Bjørks Bygg & Konstruksjon AS | Fjellhamar | 2017 |
| Bjørkøybekk Renseanlegg AS | Løkken Verk | 2013 |
| Bjørlanda Industriservice | Se-42 355 Torslanda Gøteborg | 2003 |
| Bjørlykke Bygg & Båtopplag AS | Lillesand | 2010 |
| Bjørlykke Servicedrift AS | Liabygda | 2024 |
| Bjørløw & Bunæs Da | Drammen | 1998 |
| Bjørn Arne Nergård AS | Rena | 2018 |
| Bjørn Atle Nesheim Eigedom AS | Vossestrand | 2007 |
| Bjørn Baastad AS | Trysil | 2023 |
| Bjørn Danielsen Holding AS | Skien | 2012 |
| Bjørn Døsen AS | Hagavik | 2003 |
| Bjørn Egils Malerfirma AS | Lillesand | 2017 |
| Bjørn Einar Lier AS | Slitu | 2012 |
| Bjørn Eltoft AS | Leknes | 2020 |
| Bjørn Erik Løvlien AS | Lillestrøm | 2000 |
| Bjørn Even Hammari AS | Alta | 2020 |
| Bjørn Frenning Transport & Graving AS | Stange | 2025 |
| Bjørn Frisendal AS | Flatanger | 1990 |
| Bjørn Furuheim AS | Skien | 2006 |
| Bjørn Genberg AS | Bjoa | 2015 |
| Bjørn Gregersen AS | Horten | 1986 |
| Bjørn Haga Maskin Og Transport AS | Oslo | 2008 |
| Bjørn Helge Reitan AS | Brønnøysund | 2012 |
| Bjørn Holand AS | Halden | 2019 |
| Bjørn Håkonsen Mur Og Flis- Legging AS | Skotselv | 2006 |
| Bjørn Hårstad AS | Bjugn | 2025 |