| Borren Invest AS | Jakobsli | 2014 |
| Borrpoolen Grundläggning AB Nuf | Se-439 94 Onsala | 2019 |
| Borse Capital AS | Røyken | 2022 |
| Borse Holding AS | Røyken | 2022 |
| Bortelid Hytteservice AS | Åseral | 2023 |
| Bortheim AS | Florø | 2022 |
| Borthen Service AS | Ler | 2014 |
| Bos (International) Limited | Gibraltar | 2008 |
| Boservice AS | Sandnes | 2012 |
| Boss Energy Consulting Limited | London Sw9 6De England | 2024 |
| Bostadsrættsføreningen Fritid 7 | 376 37 Svængsta | 2008 |
| Boston Consulting Group Canada Ulc | Ca-Vancouver V6C 2X8 | 2024 |
| Boston Energy Limited | Beverly Hu17 9Et | 2019 |
| Boston Holding AS | Lillesand | 2015 |
| Bostonair (Ireland) Limited | Dublin K67E5A0 | 2022 |
| Bostonair Group Limited | Hu17 8Da East Yorkshire | 2013 |
| Botnhamn Vekst AS | Botnhamn | 2015 |
| Bottenvik AS | Lillestrøm | 2012 |
| Bouncing AS | Hafrsfjord | 2022 |
| Boundless Payroll Norway AS | Oslo | 2022 |
| Bousaidi Bemanning Og Administrasjon SA | Olsvik | 2020 |
| Bov Kystbemanning AS | Rørvik | 2024 |
| Bower Crewing AS | Fosnavåg | 2013 |
| Bowling 1 Franchise AS | Gjøvik | 1999 |
| Boxnor Utleie AS | Oslo | 2026 |
| Boxx AS | Nordre Frogn | 2026 |
| Boxxy AS | Nordre Frogn | 2025 |
| BP Maskinutleie AS | Trondheim | 2024 |
| BP Rental AS | Flekkefjord | 2021 |
| BP Travel AS | Holmestrand | 2026 |
| BPM Lyd & Lys AS | Øvre Ervik | 2021 |
| BR Bil AS | Fagernes | 2014 |
| BR Flage AS | Voss | 2018 |
| BR. Bakk Utleie AS | Aure | 2016 |
| BR. Otterlei Ans | Torangsvåg | 2022 |
| Bra Folk AS | Rygge | 2026 |
| Bra Kompis AS | Oslo | 2021 |
| Bra Renhold Og Miljøservice AS | Gjøvik | 2022 |
| Bra Service AS | Sellebakk | 2012 |
| Bra Utleie AS | Bergen | 2024 |
| Braaten Invest AS | Elverum | 2017 |
| Braathen Landskapsentreprenør AS | Ytre Enebakk | 1999 |
| Braattan Bygg AS | Jonsvatnet | 2009 |
| Brabo Sør AS | Kristiansand S | 2011 |
| Brabuss AS | Vikersund | 2025 |
| Brachot Tiles & Landscaping NV | Be-8530 Harelbeke | 2026 |
| Braconda AS | Oslo | 2003 |
| Bradi AS | Melhus | 2022 |
| Braganza AB | Se-161 26 Bromma | 2014 |
| Bragd Digital AS | Ålesund | 2015 |
| Brage Eiendomservice AS | Drammen | 2025 |
| Brage Innovation AS | Bønes | 2014 |
| Bragejohan Holding AS | Sortland | 2025 |
| Brager Bil AS | Hønefoss | 2016 |
| Brages Bilutleie AS | Skodje | 2013 |
| Braingames Invest AS | Kristiansand S | 2016 |
| Brako Consulting AS | Eiksmarka | 2023 |
| Brambani Økonomi AS | Høvik | 1998 |
| Bramha AS | Austbø | 2024 |
| Bramiljø AS | Magnor | 2006 |
| Branaire Luxembourg S.A.R.L. | Lu-1313 Luxembourg | 2022 |
| Branchy Rekruttering AS | Oslo | 2020 |
| Brand Vask & Renhold AS | Lillehammer | 2019 |
| Brandasund Kultur&Fritid AS | Brandasund | 2023 |
| Brandbo Holding AS | Moelv | 2020 |
| Brandboost AS | Oslo | 2019 |
| Brandbu Håndverkerservice AS | Brandbu | 2021 |
| Brandbu Snødrift AS | Jaren | 2011 |
| Brandli AS | Haugesund | 2022 |
| Brandworks AB | Se-168 67 Bromma | 2025 |
| Branka AS | Mysen | 2013 |
| Brann & Sikkerhets Tjenesten AS | His | 2012 |
| Brann Og Låsservice AS | Hønefoss | 1999 |
| Brannforebygg AS | Lakselv | 2020 |
| Brannhaugen Eiendom AS | Frosta | 2012 |
| Brannverntjenesten AS | Fredrikstad | 2015 |
| Bransjereiser AS | Drammen | 2005 |
| Brasgas AS | Oslo | 2007 |
| Bratberg Og Paulsrud Maskinlag Da | Beitstad | 2020 |
| Bratli Eiendom AS | Jørpeland | 2007 |
| Bratli Holding AS | Jørpeland | 2005 |
| Bratlie Invest AS | Oslo | 2014 |
| Bratsberg Utleie AS | Kjerrgarden | 2023 |
| Bratt Moro AS | Sogndal | 2008 |
| Bratt Norge AS | Valle | 2016 |
| Brattgjerd Multiservice AS | Åfjord | 2020 |
| Brattlia Biogass AS | Namdalseid | 2020 |
| Brattskog AS | Østby | 2019 |
| Braut AS | Rogne | 2020 |
| Brave AS | Kongsberg | 2009 |
| Bravifix AS | Lovund | 2025 |
| Bravo Personell AS | Melhus | 2021 |
| Bravo Travelling AS | Laukvik | 2025 |
| Bravo-Utleie AS | Høylandet | 2026 |
| Bravura Norge AS | Oslo | 2022 |
| Braxo AS | Fiskum | 2025 |
| Brdr Schanche AS | Gaupen | 2019 |
| Brdr. Hanssen Da | Sandefjord | 2010 |
| Bredenoord Aggregaten Verhuur Nuf | Florø | 2014 |
| Bredsand Bil & Tilhengersenter AS | Dilling | 2022 |