| Burri Bygg Og Hage AS | Oslo | 2023 |
| Busby Geophysical Ltd | Aberdeen Ab15 6Ey Scotland | 2019 |
| Busch-Sørensen Rengjøringsbyrå AS | Bodø | 1985 |
| Busengdal Utleie AS | Stordal | 1994 |
| Buset Invest AS | Sandnes | 2010 |
| Busi Experience AS | Trysil | 2024 |
| Business Solutions AS | Bergen | 2011 |
| Businesspeople Bemanning Og Rekruttering AS | Billingstad | 1989 |
| Busken AS | Kristiansund N | 2013 |
| Buskerud Bilutleie AS | Drammen | 2018 |
| Buskerud Byggsystemer AS | Solbergelva | 2025 |
| Buskerud Drift & Vedlikehold AS | Skotselv | 2014 |
| Buskerud Fasadevask AS | Hønefoss | 2025 |
| Buskerud Prosjekt Partner AS | Kongsberg | 2009 |
| Buskerud Skadedyrkontroll AS | Drammen | 2019 |
| Buskerud Vaktmesterservice Da | Skotselv | 2015 |
| Buskerud Ventilasjonsrens AS | Hokksund | 2025 |
| Busklein Paintball Da | Heimdal | 2015 |
| Buskmenn AS | Jar | 2014 |
| Buss Bygg Og Utleie AS | Ytre Arna | 2020 |
| Buss Og Reiseservice AS | Fjellhamar | 2005 |
| Busser AS | Malmefjorden | 2023 |
| Busspart Utleie AS | Råde | 2024 |
| BUTSYANDFERRY911 Ltd | Aberdeenshire Ab12 3Tl Scotland | 2019 |
| Butterfly Garden AS | Vøyenenga | 2016 |
| Buvoll AS | Vear | 2024 |
| Buzzen AS | Raufoss | 2019 |
| BV Utleie AS | Hidrasund | 2014 |
| BVB Service AS | Oslo | 2022 |
| BVS Utleie AS | Skotselv | 2023 |
| BW Caravan AS | Inderøy | 2015 |
| BW Eiendomsservice AS | Sperrebotn | 2024 |
| BW Fleet Management & Pte Ltd | Singapore 179360 | 2009 |
| BW Gas Foreign Manning AS | Oslo | 2007 |
| BW Gas Nis Manning AS | Oslo | 2007 |
| BW LPG AS | Oslo | 2013 |
| BW Piping Design Engineering Limited | Warrington Wa1 1Rg | 2018 |
| BWC AS | Larvik | 2018 |
| BWH Hotel Group AS | Kongsberg | 2014 |
| Bwi GmbH | De-53340 Meckenheim | 2026 |
| By Com AS | Bergen | 2000 |
| By Solberg AS | Oslo | 2017 |
| Byberg Bemanning AS | Sola | 2022 |
| Byberg Invest AS | Sola | 2022 |
| Bybergs Hage AS | Birkeland | 2025 |
| Bybubbly AS | Bergen | 2013 |
| Bye Travel AS | Jarfjord | 2024 |
| Byens Vaktmester AS | Tvedestrand | 2019 |
| Bygardsli Service AS | Vossestrand | 2012 |
| Bygartner Utkilen AS | Alta | 2026 |
| Bygartnerne AS | Oslo | 2017 |
| Bygdalive AS | Kaupanger | 2024 |
| Bygdasenteret AS | Rennebu | 2011 |
| Bygdaservice SA | Voss | 2008 |
| Bygdasjarm AS | Stamnes | 2019 |
| Bygdedyret AS | Hemsedal | 2021 |
| Bygdeservice AS | Sandane | 2007 |
| Bygdeservice Bykle AS | Bykle | 2016 |
| Bygdeservice Drevsjø AS | Drevsjø | 2022 |
| Bygdeservice Hurdal Da | Hurdal | 2003 |
| Bygdeservice Straumsnes SA | Øydegard | 2008 |
| Bygg & Bolig Partner AS | Kristiansand S | 2004 |
| Bygg & Drift AS | Åros | 2015 |
| Bygg & Eiendoms Service AS | Drammen | 1987 |
| Bygg - Maskin AS | Lindesnes | 2005 |
| Bygg Og Fasade AS | Oslo | 2007 |
| Bygg Og Landskapspleie AS | Heimdal | 2005 |
| Bygg Og Murpartner Bergen AS | Fyllingsdalen | 2012 |
| Bygg Og Service Sirdal AS | Tjørhom | 2018 |
| Bygg Og Stein AS | Gan | 2025 |
| Bygg Reis Deg AS | Oslo | 1990 |
| Bygg Stillas AS | Oslo | 2023 |
| Bygg Teknisk Forvaltning AS | Tromsdalen | 2024 |
| Bygg- Og Eiendomsservice AS | Vestnes | 2022 |
| BYGG2YOU AS | Maura | 2020 |
| Byggdel I Stockholm AB | Se-182 46 Enebyberg | 2013 |
| Byggdrift Og Utleie Brønnøysund AS | Brønnøysund | 2024 |
| Byggdriften.No AS | Fornebu | 2024 |
| Bygge-Og Rengjøringsarbeider AS | Sandefjord | 2023 |
| Byggelit Sverige AB | Vollen | 2001 |
| Byggfiks AS | Stavanger | 2026 |
| Byggmann Gruppen AS | Vigra | 1984 |
| Byggmatch AS | Oslo | 2026 |
| Byggmester Bjåen Egeland AS | Skien | 2017 |
| Byggmester Dale Og Tønnessen AS | Kristiansand S | 2023 |
| Byggmester Sæther AS | Bøverbru | 2013 |
| Byggnations Design I Örebro AB | Se-702 30 Örebro | 2026 |
| Byggpartner Utleie AS | Trondheim | 2026 |
| Byggpleie AS | Haslum | 2026 |
| Byggrent-Din Renholdspartner AS | Holmestrand | 2011 |
| Byggservice Lillehammer AS | Lillehammer | 2025 |
| Byggservice Og Renhold AS | Drammen | 2013 |
| Byggstrøm Norge AS | Førresfjorden | 2025 |
| Bygolf AS | Porsgrunn | 2026 |
| Bygårdspartner AS | Østerås | 2025 |
| Bygårdsservice AS | Oslo | 2014 |
| Byklum Invest AS | Kristiansand S | 2002 |
| Byneset Glassfiberstøperi Ans | Bosberg | 1997 |
| Byneset Regnskapslag SA | Melhus | 1995 |
| Byservice AS | Hunndalen | 1997 |