| Bente Halvorsen AS | Wholesale & retail | 2021 |
| Benz Holding AS | Other services | 2019 |
| Bera Bygg AS | Construction | 2024 |
| Bergaust Bad AS | Construction | 2024 |
| Bergaust Byggtjenester AS | Construction | 2017 |
| Berger Langmoens Veg 10 AS | Real estate | 2009 |
| Best Eiendom AS | Real estate | 1998 |
| Best Front AS | Wholesale & retail | 2025 |
| Bil 1 Innlandet AS | Wholesale & retail | 2014 |
| Bil Og Lakk Brumunddal AS | Wholesale & retail | 2023 |
| Bjarne Stensli & Sønner AS | Water & waste | 1979 |
| Bjerke & Andersen AS | Arts & recreation | 2020 |
| Bjerke Eiendom Invest AS | Real estate | 2001 |
| Bjerkeli Motocrosstrening AS | Education | 2022 |
| Bjørge Eiendom Da | Real estate | 2011 |
| Bjørgeberget Samdrift Da | Agriculture & fishing | 2011 |
| Bjørgerud Drift Da | Agriculture & fishing | 2015 |
| Bjørkebo Barnehage SA | Education | 1989 |
| Bjørkhaug Eiendom AS | Real estate | 1987 |
| Bjørndalen Holding AS | Real estate | 2010 |
| Blondie Holding AS | Professional & scientific | 2020 |
| Bobletoppen AS | Wholesale & retail | 2023 |
| Bokrudstad Holding AS | Construction | 2023 |
| Bolig Og Hyttegruppen AS | Real estate | 2022 |
| Boligportalen AS | Professional & scientific | 2008 |
| Borgen FL AS | Real estate | 2020 |
| BPL Eiendom AS | Real estate | 2020 |
| Bratbakken Ved Og Brukthandel AS | Wholesale & retail | 2011 |
| Brennbart AS | Wholesale & retail | 2022 |
| Broberg AS | Real estate | 1970 |
| Bru Anlegg AS | Construction | 2017 |
| Bru Utvikling AS | Construction | 2017 |
| Brugata 12 Drift AS | Hospitality | 2024 |
| Brugård Eiendom AS | Real estate | 2010 |
| Brumio AS | Information & communication | 2026 |
| Brumund AS | Manufacturing | 2020 |
| Brumund Eiendom AS | Real estate | 2020 |
| Brumund Oppvekstsenter SA | Education | 2004 |
| Brumund Sykkel AS | Other services | 2024 |
| Brumunddal Auto AS | Other services | 2026 |
| Brumunddal Bensin Og Kiosk AS | Wholesale & retail | 2012 |
| Brumunddal Bil & Karosseri AS | Other services | 2004 |
| Brumunddal Bilpleie, Byggeservice Og Transport AS | Other services | 2022 |
| Brumunddal Bilspa AS | Other services | 2020 |
| Brumunddal Blikk AS | Construction | 1992 |
| Brumunddal Dekk AS | Wholesale & retail | 2006 |
| Brumunddal Dyreklinikk AS | Professional & scientific | 2020 |
| Brumunddal Eiendom & Utleie AS | Real estate | 2020 |
| Brumunddal Eiendom AS | Real estate | 2000 |
| Brumunddal Elektro AS | Construction | 2013 |
| Brumunddal Frisersalong Herreavdelingen AS | Other services | 1994 |
| Brumunddal Fysikalske Institutt AS | Health & social care | 2017 |
| Brumunddal Handelsbygg AS | Real estate | 2007 |
| Brumunddal Kontorbygg AS | Real estate | 2007 |
| Brumunddal Legesenter AS | Health & social care | 2013 |
| Brumunddal Mesterbygg AS | Construction | 2019 |
| Brumunddal Pizza&Girll AS | Hospitality | 2023 |
| Brumunddal Regnskap AS | Professional & scientific | 1998 |
| Brumunddal Rør AS | Construction | 2005 |
| Brumunddal Sentrum AS | Professional & scientific | 2015 |
| Brumunddal Sushi AS | Hospitality | 2014 |
| Brumunddal Systua AS | Manufacturing | 2023 |
| Brumunddal Transport AS | Transport & logistics | 2018 |
| Brumunddal Ullvarefabrikk AS | Manufacturing | 1973 |
| Brumunddal Utleie AS | Real estate | 2014 |
| Brumundheim SA | Real estate | 1970 |
| Brække Bygg AS | Construction | 2000 |
| Brødrene Frisli Da | Construction | 1989 |
| Brødrene Syversen Anlegg AS | Construction | 1990 |
| Bulkteknikk AS | Other services | 2023 |
| Butikk 20 Ans | Wholesale & retail | 2006 |
| Butikkhjelpen Ans | Professional & scientific | 2012 |
| Buttekvernvegen 5 AS | Real estate | 2020 |
| Buttekvernvegen AS | Real estate | 2023 |
| Bye Graveservice AS | Construction | 2016 |
| Bygg Og Håndtverkstjenester AS | Wholesale & retail | 2020 |
| Byggeklossen Brumunddal AS | Wholesale & retail | 2018 |
| Byggeklossen Lillehammer AS | Wholesale & retail | 2012 |
| Byggeklossen Strandtorget AS | Wholesale & retail | 2022 |
| Byggmester Bjørn Vidar Håve AS | Construction | 2004 |
| Byggmester Frank Syversen AS | Construction | 2007 |
| Byggmester JT Dale AS | Construction | 2025 |
| Byggmester Rognlien Eiendom AS | Construction | 2021 |
| Byggtek Innlandet AS | Professional & scientific | 2017 |
| Byporten Sør AS | Real estate | 2017 |
| Bekkelund Bygg | | 1987 |
| Bækkevold Holding AS | Real estate | 2020 |
| Bækkevolds Våpenservice AS | Manufacturing | 2020 |
| Bærekraftig AS | Wholesale & retail | 2021 |
| Børke AS | | 2017 |
| Børkevegen AS | Real estate | 2026 |
| Calco Holding AS | | 2020 |
| Catering Innlandet AS | Hospitality | 2017 |
| Centrum Konditori Evensen Og Evensen Ans | Wholesale & retail | 1990 |
| Cfo AS | Real estate | 2010 |
| CH Service AS | Other services | 2025 |
| Chai Masala AS | Hospitality | 2024 |
| Chaplin Frisør Brumunddal AS | Other services | 2006 |
| City Park AS | Real estate | 2015 |
| Classic Truck Parts AS | Wholesale & retail | 2014 |