| Bjørn Indergård Invest AS | Trondheim | 2005 |
| Bjørn Kåre Sagabraaten AS | Sandnessjøen | 2012 |
| Bjørn Legreid VVS AS | Straumsgrend | 2014 |
| Bjørn Lermoen Holding AS | Tynset | 2022 |
| Bjørn Myhra & Sønn Entreprenør AS | Råde | 2005 |
| Bjørn Mykland AS | Gjerstad | 2013 |
| Bjørn Nilsen Maskin AS | Oteren | 1998 |
| Bjørn Norset AS | Brekstad | 2013 |
| Bjørn Och Robin Isoleringsaktiebolag Nuf | Se-511 92 Örby | 2023 |
| Bjørn Ole Inglingstad Holding AS | Oslo | 2019 |
| Bjørn Ovik AS | Sortland | 2008 |
| Bjørn Simonsen & Sønn AS | Oslo | 1985 |
| Bjørn Simonsen Og Sønn Bygg AS | Oslo | 2023 |
| Bjørn Solberg Graving Og Transport AS | Eidsberg | 2016 |
| Bjørn Solli AS | Sømna | 1993 |
| Bjørn Ståle Vike AS | Aurland | 2013 |
| Bjørn Svenne Arnesen AS | Råde | 2013 |
| Bjørn Tores Elektro AS | Jessheim | 2003 |
| Bjørn Tveito AS | Ål | 2011 |
| Bjørn Vidar Jørgensen AS | Ørje | 2011 |
| Bjørn Winge Holding AS | Verdal | 1990 |
| Bjørn Zakariassen AS | Lødingen | 2006 |
| Bjørn Østby AS Ingeniør Og Entreprenørforretning | Sande I Vestfold | 1987 |
| Bjørn's Byggservice AS | Velfjord | 2022 |
| Bjørnafjorden Bygg AS | Hagavik | 2017 |
| Bjørnafjorden Bygg Tjenester AS | Os | 2025 |
| Bjørnafjorden Elektro AS | Os | 2021 |
| Bjørnafjorden Flis Og Mur AS | Os | 2024 |
| Bjørnafjorden Hage & Anlegg AS | Os | 2020 |
| Bjørnafjorden Tømrerservice AS | Os | 2022 |
| Bjørnafjorden VVS AS | Eikelandsosen | 2024 |
| Bjørnar Larsen Bygg AS | Øvre Vats | 2026 |
| Bjørnar Lind AS | Myre | 1989 |
| Bjørnar Vaslien AS | Raufoss | 2012 |
| Bjørnarå Rørleggermester AS | Vennesla | 1988 |
| Bjørnback AS | Skien | 2008 |
| Bjørndal Vedlikehold AS | Vanse | 2006 |
| Bjørndal VVS AS | Langhus | 2011 |
| Bjørndal-Riis AS | Degernes | 2018 |
| Bjørndalen Og Hansen Da | Bergen | 1995 |
| Bjørndalåsen Panorama AS | Sande I Vestfold | 2008 |
| Bjørnebråten Bygg AS | Gol | 2017 |
| Bjørnereim Ventilasjon AS | Tønsberg | 2021 |
| Bjørnevatn Bygg AS | Bjørnevatn | 2024 |
| Bjørnevatn Drift AS | Svanvik | 2015 |
| Bjørnevatn Elektro AS | Bjørnevatn | 1993 |
| Bjørnevatn Maskin AS | Svanvik | 2008 |
| Bjørnfeld Bygg AS | Skien | 2020 |
| Bjørnhaug Multiservice AS | Askim | 2023 |
| Bjørnholmen Og Indre Tronderøy Utbygging AS | Kristiansand S | 2017 |
| Bjørnholt Bygg AS | Oslo | 2003 |
| Bjørnrud Bygg AS | Aust-Torpa | 2017 |
| Bjørns Blikk AS | Asker | 2007 |
| Bjørns Bygg AS | Revetal | 2012 |
| Bjørns Bygg Drift AS | Revetal | 2026 |
| Bjørns Rørleggerservice AS | Oslo | 1997 |
| Bjørns Transport AS | Koppang | 1986 |
| Bjørns Varmeservice AS | Ålgård | 2016 |
| Bjørnsen AS | Strusshamn | 2017 |
| Bjørnsen-Maskin AS | Horten | 2016 |
| Bjørnstad Bygg AS | Rakkestad | 2006 |
| Bjørnstad Eiendom Og Utleie AS | Fetsund | 2016 |
| Bjørnstad Tjenester AS | Sandefjord | 2026 |
| Bjørnstadveien AS | Sande I Vestfold | 2016 |
| Bjørnstu VVS AS | Heimdal | 2002 |
| Bjørnvolden Maskin AS | Otta | 2012 |
| Bjørnø Maskin AS | Larvik | 2001 |
| Bjørstad & Sævik AS | Kopervik | 2023 |
| Bjørvik & Haugen AS | Sandefjord | 1996 |
| Bjørvika Infrastruktur AS | Oslo | 2002 |
| Bjørås Eiendom AS | Levanger | 1978 |
| Bjørø Holding AS | Os | 2018 |
| BK Aarak AS | Treungen | 2020 |
| BK Anleggsservice AS | Notodden | 2014 |
| BK Bygg Og Konsult AS | Yven | 2026 |
| BK Bygg Og Service AS | Molde | 2020 |
| BK Bygg&Eiendom AS | Vikersund | 2016 |
| BK Byggentreprise AS | Tromsø | 2004 |
| BK Byggservice AS | Blommenholm | 2014 |
| BK Byggsøk AS | Trondheim | 2005 |
| BK El-Service AS | Hommelvik | 2012 |
| BK Elektro AS | Kristiansand S | 2016 |
| BK Installasjon AS | Stathelle | 2025 |
| BK Maskin AS | Trondheim | 2022 |
| BK Montasje AS | Årnes | 2023 |
| BK Mur Og Invest AS | Tveit | 2025 |
| BK Rør AS | Båtstø | 2000 |
| BK Snekker Og Tømrer AS | Oslo | 2012 |
| BK Varmeteknikk AS | Hokksund | 2011 |
| BK Ventilasjon AS | Blaksæter | 2025 |
| BK Våtrom AS | Søreidgrend | 2025 |
| Bk-Anlegg AS | Lørenskog | 2014 |
| Bk-Prosjekt AS | Lørenskog | 2019 |
| Bka Elektro AS | Asker | 2021 |
| BKB Montasje AS | Nannestad | 2024 |
| BKB Surnadal AS | Surnadal | 2020 |
| Bke Maling Og Snekkerservice AS | Trondheim | 2022 |
| Bki AS | Lunde | 2019 |
| Bkjr Holding AS | Bryne | 2021 |
| Bkmalerservice AS | Oslo | 2024 |