| Brekke Sanitær AS | Holmestrand | 1997 |
| Brekken Anlegg AS | Stamsund | 2021 |
| Brekkes Murservice AS | Sundebru | 2006 |
| Brekkestø Bygg Og Vedlikehold AS | Brekkestø | 2016 |
| Brekkeveien Invest AS | Kvernaland | 2006 |
| Brekne Bygg AS | Farsund | 2025 |
| Brekneholmen Slipp AS | Borhaug | 2016 |
| Bremanger Bygg AS | Bremanger | 2014 |
| Brembu Bygg AS | Høylandet | 2021 |
| Bremer Bygg AS | Førde | 2025 |
| Bremnes Eiendom Invest AS | Kristiansund N | 2011 |
| Bremseth Bad AS | Stjørdal | 2021 |
| Bremseth VVS AS | Hell | 2007 |
| Brendberg Bygg Og Betong AS | Utskarpen | 2012 |
| Brende AS | Melhus | 1975 |
| Brende Holding AS | Melhus | 2024 |
| Brenden & Co Stillasutleie AS | Ytre Enebakk | 1998 |
| Brenden Allservice Nuf | Drammen | 2019 |
| Brenden Og Markeng Maskindrift Da | Fluberg | 1997 |
| Brendø AS | Florø | 2022 |
| Brenna Kystcamp AS | Stokkøy | 2015 |
| Brenne Entreprenør AS | Sykkylven | 2009 |
| Brenne Og Juvland Da | Nordagutu | 1989 |
| Brenni AS | Algarheim | 2016 |
| Brenno Bygg AS | Gol | 2021 |
| Brenno Og Korsmo Byggservice Ans | Askim | 2000 |
| Brennåsen Invest AS | Brennåsen | 2010 |
| Bret Grupp | Sangaste, Valgamaa 67002 | 2014 |
| Brettingen El. AS | Askim | 2022 |
| Bretun Tak AS | Moss | 2024 |
| Brevig & Hagen Holding AS | Slemmestad | 2019 |
| Brevik AS | Lierskogen | 2016 |
| Brevik Bygg AS | Lensvik | 2023 |
| Brevik Elektro AS | Stathelle | 2019 |
| Brevik Holding AS | Lierskogen | 2021 |
| BRF AS | Oslo | 2013 |
| BRF Entreprenør AS | Skrova | 2023 |
| BRG Entreprenør AS | Kristiansand S | 2008 |
| BRG Holdco AS | Kristiansand S | 2022 |
| BRG Invest AS | Kristiansand S | 2014 |
| BRG Midco AS | Kristiansand S | 2018 |
| Brial Sikkerhetssystemer Da | Tromsdalen | 2010 |
| Brian Hansen Eftf. AS | Kvelde | 2012 |
| Brickwall AS | Oslo | 2005 |
| Bridgeplex Ltd | London Sw15 2Nw England | 2014 |
| Bright Networks AB Nuf | Se-168 67 Bromma | 2025 |
| Brightec Security AS | Hamar | 2007 |
| Brimer Holding AS | Kvamsøy | 1983 |
| Brimer Saldus Sia Nuf | Lv-3862 Sandes | 2020 |
| Brimstone Pipeline Services Ltd | Stirling Fk8 1Rb | 2019 |
| Brinchen & Mykland AS | Hokksund | 2023 |
| Bringa Holding AS | Gvarv | 2022 |
| Bringa VVS & Industri AS | Gvarv | 2021 |
| Bringedal Holding AS | Årdal I Ryfylke | 1982 |
| Bringtinden Bygg AS | Silsand | 2023 |
| Brinkis AS | Oslo | 2023 |
| Bris Konsult AS | Tolvsrød | 2009 |
| Briskeby Maskinentreprenør AS | Lunner | 2025 |
| Briskeby Utvikling AS | Skreia | 2018 |
| Briskodden Byggtjenester AS | Hedalen | 2024 |
| Briso AS | Førresfjorden | 2023 |
| Britek Nuf | 791 40 Falun | 2006 |
| Brittan Snekker Og Hageservice AS | Sandefjord | 2026 |
| BRJ Entreprenad AB Nuf | Se-451 95 Uddevalla | 2019 |
| BRK AS | Storsteinnes | 2011 |
| BRL AS | Fjellstrand | 2011 |
| BRL Bygginnredning AS | Fjellstrand | 2024 |
| Bro El-Installasjon AS | Skiptvet | 2024 |
| Bro Og Kai Vedlikehold II AS | Mandal | 2014 |
| Bro Og Kantstein Service Limited Nuf | Bøstad | 2009 |
| Bro Underhåll & Service Bus AB | Se-461 59 Trollhättan | 2023 |
| Bro-Elektro AS | Sande I Vestfold | 2006 |
| Brocklin Bygg AS | Oslo | 2005 |
| Broda & Bogacz AS | Oslo | 2021 |
| Brodahl & Jahren Drift AS | Dilling | 2023 |
| Brodens Bygg I Göteborg | 414 58 Göteborg | 2010 |
| Broderbygg AS | Atløy | 2021 |
| Brodin AS | Oslo | 2000 |
| Brodmont D O O | Oslo | 2007 |
| Broen Invest AS | Barkåker | 2006 |
| Broherhood Drillers AS | Minnesund | 2020 |
| Brokke Bygg AS | Rysstad | 2020 |
| Brokke Ventilasjon Og Blikk AS | Vennesla | 2018 |
| Brokke VVS AS | Rysstad | 2023 |
| Brokvik Maskinstasjon AS | Sørvik | 2023 |
| Broma AS | Notodden | 2022 |
| Bromanders Håndverk AS | Vestby | 2025 |
| Bromle Maskin AS | Øystese | 2018 |
| Bromma Eiendom Da | Nesbyen | 2005 |
| Bromseth Bygg Og Håndverk AS | Aurdal | 2026 |
| Brondum International AS | Dk-8800 Viborg | 2018 |
| Brons Invest AS | Braskereidfoss | 2017 |
| Brons M&S AS | Braskereidfoss | 2012 |
| Bronson AS | Kongsvinger | 2014 |
| Brook AS | Lommedalen | 2021 |
| Brooks-Frogner Holding AS | Saltnes | 2025 |
| Broren Min AS | Trondheim | 2023 |
| Brot Bygg AS | Geithus | 2015 |
| Broteknik I Norr AB | Se-943 36 Öjebyn | 2023 |
| Brotet AS | Kleppe | 2005 |