| Bd-Vest AS | Espeland | 2020 |
| Bda Bygg AS | Vollen | 2022 |
| Bda Grupp AS | Vollen | 2025 |
| BDB Dismantling Limited | Barnsley S73 0Bs | 2019 |
| BDG AS | Trondheim | 2011 |
| BDG Holding AS | Kristiansand S | 2018 |
| BDM Elektro AS | Tranby | 2004 |
| Be Bygg AS | Jessheim | 2026 |
| Be Byggmontering AS | Alversund | 2018 |
| Be Elektro AS | Oslo | 1999 |
| Be Liland AS | Flekkefjord | 2021 |
| Be Maskin AS | Røldal | 2020 |
| Be Sanden Bygg AS | Kvam | 2013 |
| Be-Lo Elektriska Aktiebolag | 784 34 Borlänge | 2013 |
| Be-Mo AS | Fauske | 2005 |
| Bea Gruppen AS | Rådal | 2012 |
| Bear Bygg AS | Drammen | 2017 |
| Bear Group AS | Drammen | 2019 |
| Beate II AS | Oslo | 2016 |
| Beatus AS | Enebakk | 2025 |
| Bech AS | Oslo | 2023 |
| Bech Maskin&Spregning AS | Bjerka | 2025 |
| Beck & Pollitzer France SAS | Fr-59230 Saint-Amand-Les-Eaux | 2023 |
| Beck Og Bie Bygg AS | Drammen | 2016 |
| Becker & Hüser GmbH & Co.Kg | De-47665 Sonsbeck | 2022 |
| Becker Entreprenør AS | Oslo | 2005 |
| Becker Proff Entreprenør AS | Oslo | 2023 |
| Beckmann Bygg AS | Oslo | 2007 |
| Beckmann Bygg Entreprenør AS | Oslo | 2024 |
| Beddari Bygg AS | Pasvik | 2012 |
| Bedre Bygg Nuf | Haugesund | 2010 |
| Bedre Elektro AS | Oslo | 2018 |
| Bedre Hus AS | Rauland | 2015 |
| Bedre VVS AS | Oslo | 2024 |
| Bedrift Bygg Og Anleggstjenester AS | Hesseng | 2022 |
| Bedriftsservice Vest AS | Tysværvåg | 2023 |
| Bedriftsveien 2 AS | Kristiansund N | 2007 |
| Bedrock AS | Oppdal | 2025 |
| Beerenberg Industri AS | Porsgrunn | 1995 |
| Befa Bygg AS | Nøtterøy | 2002 |
| Befesa Aluminio SL | Es-48950 Erandio Bizkaia | 2021 |
| Beffen AS | Straume | 2026 |
| Befo Holding AS | Bergen | 2005 |
| Begby Elektriske AS | Gamle Fredrikstad | 1998 |
| Bego AS | Bekkestua | 2010 |
| Beha Bygg AS | Jessheim | 2022 |
| Beier Bygg AS | Dal | 2014 |
| Beiermann Bygg AS | Bodø | 2025 |
| Beinved AS | Stord | 2010 |
| Beito AS | Oslo | 2012 |
| Beito Bygg AS | Heggenes | 2010 |
| Beito Membran AS | Beito | 2025 |
| Beitostølen Anlegg AS | Beitostølen | 2005 |
| Beitostølen Maskin Og Transport AS | Beitostølen | 2003 |
| Beitstad Maskin AS | Beitstad | 2012 |
| Bek Maskin AS | Storslett | 2011 |
| Beka Ans | Høvik | 2002 |
| Beka Bygg Da | Oslo | 2010 |
| Bekaert Maccaferri Underground Solutions Bvba | Be-9320 Aalst-Erembodegem | 2017 |
| Bekk Anlegg AS | Holmestrand | 2013 |
| Bekk Elektro AS | Stabekk | 2026 |
| Bekkefaret AS | Ski | 2018 |
| Bekkelaget Parkettsliperi AS | Nesbru | 1996 |
| Bekkelaget Prosjekt AS | Oslo | 1996 |
| Bekkelaget Tømrerfirma Da | Oslo | 2005 |
| Bekkeli Holding AS | Oslo | 2006 |
| Bekkemoen & Brandett VVS | Flisa | 1987 |
| Bekken Bygg AS | Trondheim | 2006 |
| Bekken VVS Og Rådgivning AS | Drammen | 2023 |
| Bekkeseth Bygg AS | Rødberg | 2016 |
| Bekkesstua Bygg AS | Bekkestua | 2026 |
| Bekkestad AS | Drammen | 2021 |
| Bekkestua Rørleggerbedrift AS | Haslum | 2025 |
| Bekkestua VVS AS | Haslum | 2025 |
| Bekkevold Bygg Og Bad AS | Løten | 2009 |
| Bekkevold Eiendom AS | Askim | 2007 |
| Bekkevold Murerservice AS | Gressvik | 2024 |
| Bekkevolds Byggservice AS | Ridabu | 2012 |
| Bekkhus Bygg & Entreprenør AS | Kvinesdal | 2010 |
| Bekkhus Eiendom AS | Tuddal | 2011 |
| Bekkhus Invest AS | Tuddal | 2020 |
| Bekkjorden Og Nysæther Bygg AS | Veggli | 1996 |
| Bekkvang Eiendom AS | Løten | 2017 |
| Bekkvang Varmepumper AS | Løten | 2017 |
| Bel Invest AS | Myre | 2005 |
| Bel-Kom-Belägningskompetens | Se 79 177 Falun | 2010 |
| Belam Norge AS | Os | 2017 |
| Belam Riga Norge Nuf | Oslo | 2019 |
| Belegg Spesialisten AS | Trondheim | 2021 |
| Beleggsenteret AS | Mo I Rana | 1996 |
| Belfor Norway AS | Oslo | 2002 |
| Belgen Holding AS | Trøgstad | 2024 |
| Belgen Maskin Og Transport AS | Trøgstad | 2024 |
| Bell Bygg AS | Asker | 2026 |
| Bella Bo Og Bygg AS | Oslo | 2024 |
| Belland Drift AS | Færvik | 2012 |
| Belland Invest AS | Lyngdal | 2019 |
| Belland Naturstein AS | Lyngdal | 2021 |
| Belli Invest AS | Hundvåg | 2005 |
| Belling Maskin AS | Stadsbygd | 2014 |