| Bakkerud Invest AS | | 2019 |
| Bakketopp Holding AS | | 2025 |
| Bakketoppen Invest AS | | 2005 |
| Baklengs Salto AS | Arts & recreation | 2022 |
| Bakmann AS | Real estate | 2003 |
| Bakmenn AS | Wholesale & retail | 2020 |
| Bako Holding AS | Real estate | 2020 |
| Bakoba AS | Financial services | 2005 |
| Bakoverlent AS | Information & communication | 2011 |
| Bakroret AS | Education | 2014 |
| Bakshi Håndverker AS | Construction | 2020 |
| Baksiden Invest AS | | 2023 |
| Baksideutvikling AS | Information & communication | 2024 |
| Baksnakk AS | Professional & scientific | 2021 |
| Bakteriefritt Holding 2 AS | Wholesale & retail | 2010 |
| Bakøy & Bakøy AS | Professional & scientific | 2021 |
| Bal Holding AS | | 2020 |
| Bal Invest AS | | 2022 |
| Baladi Engros AS | Wholesale & retail | 2023 |
| Balajs AS | Transport & logistics | 2023 |
| Balance Knowledge AS | Education | 2022 |
| Balanco Accounting AS | Professional & scientific | 2014 |
| Balanco Nordic AS | Professional & scientific | 2022 |
| Balanse CG AS | Professional & scientific | 2017 |
| Balanse Hus AS | Real estate | 2016 |
| Balansenarve AS | Health & social care | 2020 |
| Balansert Ventilasjon Oslo AS | Construction | 2025 |
| Balansia AS | Education | 2025 |
| Balanzera Bislett AS | Other services | 2018 |
| Balchens Investco AS | Financial services | 2021 |
| Balco AB | Construction | 2002 |
| Balco AS | Wholesale & retail | 1997 |
| Balcon Holding AS | | 2023 |
| Bald AS | Administrative & support | 2020 |
| Baldejera Av-Teknikk AS | Construction | 2012 |
| Balder Apotek AS | Wholesale & retail | 2014 |
| Balder Bolig AS | Real estate | 1993 |
| Balder Bygulv AS | Real estate | 2021 |
| Balder Cap AS | | 2023 |
| Balder Eiendom AS | Real estate | 1993 |
| Balder Expert AS | Administrative & support | 2023 |
| Balder Forvaltning AS | Financial services | 2002 |
| Balder Prosjekt AS | Real estate | 2020 |
| Balder Technology AS | Information & communication | 2025 |
| Balder's Lux AS | Wholesale & retail | 2020 |
| Balderklinikken AS | Health & social care | 2005 |
| Baldermoen AS | Real estate | 2014 |
| Balders Gate 28 AS | Real estate | 2015 |
| Balders Havn AS | Real estate | 2014 |
| Balderx AS | Wholesale & retail | 2022 |
| Baldr AS | Real estate | 2005 |
| Baldr.Ai AS | Information & communication | 2025 |
| Baldrian Forvaltning AS | | 2014 |
| Baldrian Invest AS | Real estate | 2006 |
| Baldur Coatings AS | Professional & scientific | 2007 |
| Balear Invest AS | Real estate | 2013 |
| Baleri AS | | 2025 |
| Balisany Holding AS | Information & communication | 2018 |
| Baljit Holding AS | Hospitality | 2023 |
| Baljit's AS | Hospitality | 2023 |
| Balkan Art Department AS | Professional & scientific | 2012 |
| Balkan Events AS | Administrative & support | 2019 |
| Balkan Invest AS | Professional & scientific | 2021 |
| Balkan Pizza & Kebabhouse Avdeling Bislett AS | Hospitality | 2008 |
| Balkeby Eiendom AS | Real estate | 2013 |
| Balkongeksperten AS | Construction | 2012 |
| Balkonghage AS | Administrative & support | 2021 |
| Balkongteam AS | Construction | 1998 |
| Balkongteam Holding AS | Construction | 2000 |
| Ballabrombir AS | Arts & recreation | 2020 |
| Ballaro Vollebekk AS | Hospitality | 2026 |
| Ballast AS | | 2017 |
| Ballasttech Niva AS | Professional & scientific | 2006 |
| Balle De Match AS | Wholesale & retail | 2025 |
| Ballerina Invest AS | Real estate | 2008 |
| Ballermann & Sønn | Wholesale & retail | 1999 |
| Ballester AS | Wholesale & retail | 2014 |
| Ballester Jardin Disain Limited | Administrative & support | 2020 |
| Ballista AS | Financial services | 2002 |
| Balloon Ranger Norway AS | Arts & recreation | 2022 |
| Ballplace AS | | 2025 |
| Ballplassveien 2 Bolig AS | Real estate | 2022 |
| Ballplassveien 2 Næring AS | Real estate | 2022 |
| Ballr AS | Financial services | 2012 |
| Ballsport AS | Arts & recreation | 1993 |
| Ballymakenny AS | Real estate | 2023 |
| Balma AS | Transport & logistics | 2020 |
| Balmer AS | Financial services | 2005 |
| Balmforth AS | Professional & scientific | 2026 |
| Balmora Holdings AS | | 2022 |
| Balmoral AS | | 2025 |
| Balmoral Invest AS | Financial services | 2017 |
| Baloo AS | Transport & logistics | 1946 |
| Balslev Holding AS | | 2024 |
| Balstad Holding AS | | 2021 |
| Baltasar Holding AS | | 2025 |
| Baltazar Ristorante & Enoteca AS | Hospitality | 2012 |
| Balteskard Invest AS | Real estate | 2007 |
| Balthazar Holding AS | Administrative & support | 2013 |
| Balthazar Interior AS | Professional & scientific | 2024 |