| Bruktbil Outlet AS | Wholesale & retail | 2019 |
| Brumi AS | | 2022 |
| Brunholmgata 9 AS | Real estate | 2014 |
| Brusdalsvegen 220 AS | Real estate | 2026 |
| Brusdalsveien 212 AS | Agriculture & fishing | 2009 |
| Brusdalsveien 238 AS | Real estate | 2005 |
| Bryggen Marina AS | Manufacturing | 2006 |
| Brødr Aarseth Eiendom AS | Real estate | 2010 |
| Brødr Dyrøy AS | Real estate | 2001 |
| Brødrene Ekornes Industri AS | Professional & scientific | 1998 |
| Brødrene Jangaard AS | Real estate | 1931 |
| Brødrene Pedersen Bygg AS | Construction | 1997 |
| Brønnøy Havfiske AS | Agriculture & fishing | 2009 |
| BSK Holding AS | | 2022 |
| BST Holding AS | Professional & scientific | 2012 |
| BT Entreprenør AS | Construction | 2007 |
| BTB Consulting AS | Professional & scientific | 2017 |
| BTH Invest AS | Health & social care | 2013 |
| Bubble Pop! AS | Hospitality | 2018 |
| Buch & Larsgård Bygg Ans | Construction | 2005 |
| Bud Eiendom AS | Real estate | 2023 |
| Buholmen Invest AS | Real estate | 2005 |
| Buholmens Byggeselskap AS | Real estate | 1988 |
| Bunadmakeren AS | Manufacturing | 2024 |
| Bunadsbrodering AS | Manufacturing | 2025 |
| Bunadspesialisten AS | Wholesale & retail | 2006 |
| Bunker Eiendom AS | Real estate | 1992 |
| Bunker Oil AS | Wholesale & retail | 1938 |
| Burgis AS | Professional & scientific | 2026 |
| Business Consult AS | Professional & scientific | 2021 |
| Busy Bee AS | Health & social care | 2021 |
| Butikkdrift Butowski AS | Wholesale & retail | 2025 |
| Butikkdrift Gundelfingen AS | Wholesale & retail | 2024 |
| Butikkdrift Hildur Støylen AS | Wholesale & retail | 2021 |
| Butikkdrift Mirian Strøm AS | Wholesale & retail | 2024 |
| Butikkutstyr Møre AS | Wholesale & retail | 1999 |
| Bva Handel AS | Wholesale & retail | 2020 |
| Bva Holding AS | Wholesale & retail | 2020 |
| BVG33 AS | | 2021 |
| By Stokkeholm AS | Wholesale & retail | 2001 |
| By Waterfall AS | Professional & scientific | 2023 |
| Byarch Ans | Professional & scientific | 1990 |
| Bybadet AS | Arts & recreation | 2020 |
| Byfogden AS | Real estate | 2015 |
| Bygaard AS | Real estate | 2026 |
| Byggecompaniet AS | Construction | 2019 |
| Byggelaget AS | Construction | 1993 |
| Byggeledelse Norge AS | Construction | 2004 |
| Byggfag AS | Wholesale & retail | 1990 |
| Byggfag Invest AS | Real estate | 2020 |
| Byggforvaltning Norge AS | Real estate | 2008 |
| Byggmester Sylte Og Allum AS | Construction | 2026 |
| Byggmestern Møre AS | Construction | 1995 |
| Byggmontering Møre AS | Construction | 2021 |
| Byggservice 24 Da | Construction | 2015 |
| Byggtakst Møre AS | Real estate | 2008 |
| Byggtorget Eiendom AS | Real estate | 2006 |
| Byggtorget Holding AS | Real estate | 2005 |
| Byggverdi AS | | 2025 |
| Bygrunna AS | Agriculture & fishing | 2018 |
| Byrampen Eiendom AS | Real estate | 2020 |
| Byrne Handel AS | Wholesale & retail | 2021 |
| Byrne Invest AS | Wholesale & retail | 2021 |
| Bytoget Ålesund AS | Transport & logistics | 2019 |
| Bytunnelen AS | Construction | 2008 |
| Brandtzæg & CO A/S | Real estate | 1966 |
| Byggservice Møre AS | Real estate | 1973 |
| Bålholmen AS | Real estate | 2006 |
| Børsa Eiendom AS | Real estate | 2020 |
| C Food Norway AS | Manufacturing | 2016 |
| C Hånes AS | | 2026 |
| C.Larsen Eiendom AS | Real estate | 2022 |
| Cabal Modeller AS | Professional & scientific | 2025 |
| Cach AS | Real estate | 2011 |
| Cafe Moagård AS | Hospitality | 2003 |
| Cajeroma Invest AS | | 2023 |
| Cajo Eiendom AS | Transport & logistics | 2018 |
| Cake Mobility AS | Wholesale & retail | 2023 |
| Calmgianttour AS | Administrative & support | 2024 |
| Calwin AS | Information & communication | 1985 |
| Can Cam Drop in AS | Other services | 2002 |
| Can Cam Moa AS | Other services | 1990 |
| Can Cam Skolen AS | Professional & scientific | 1999 |
| Can Cam Utvikling AS | Administrative & support | 2001 |
| Candowe AS | Wholesale & retail | 2025 |
| Candy Holding AS | | 2023 |
| Canelli AS | Real estate | 2019 |
| Cantor AS | Information & communication | 1993 |
| Cantor System AS | Information & communication | 1998 |
| Cape Invest AS | Real estate | 2005 |
| Capi AS | Financial services | 2012 |
| Capricorn AS | Administrative & support | 1995 |
| Capricorn Holding AS | Administrative & support | 2006 |
| Capsem Consult AS | Professional & scientific | 2024 |
| Car-X AS | Wholesale & retail | 2012 |
| Carat Butikkdrift AS | Wholesale & retail | 2001 |
| Carbonchange AS | Information & communication | 2022 |
| Caro AS | Wholesale & retail | 2013 |
| Caro Maskinservice AS | Real estate | 2012 |
| Cas AS | Financial services | 2016 |