| Bulk Ormlia AS | Real estate | 2018 |
| Bulk Park Enebakk AS | Real estate | 2019 |
| Bulk Park Enebakk II AS | Real estate | 2021 |
| Bulk Powered Land AS | Construction | 2016 |
| Bulk Smart Repair AS | Other services | 2023 |
| Bulk Torvuttaket AS | Real estate | 2025 |
| Bulk Vestby Øst AS | Real estate | 2024 |
| Bulk Vinterbro II AS | Real estate | 2008 |
| Bulk Yieldco AS | Real estate | 2025 |
| Bulkas Invest AS | | 2023 |
| Bulkship Management AS | Professional & scientific | 1999 |
| Bull Aktiv AS | Education | 2014 |
| Bull Brothers Holding AS | Financial services | 2008 |
| Bull Global Domination AS | | 2018 |
| Bull Media Consulting AS | Professional & scientific | 2001 |
| Bull Pollastri Holding AS | | 2026 |
| Bull Ski & Kajakk AS | Wholesale & retail | 1975 |
| Bull Stubberud AS | Information & communication | 2017 |
| Bull Superski AS | Wholesale & retail | 2013 |
| Bull Vekst AS | | 2020 |
| Bulla AS | | 2025 |
| Bullaale AS | Information & communication | 2020 |
| Bullbax AS | Financial services | 2007 |
| Bullbiz AS | | 2022 |
| Bulldoser AS | Real estate | 2006 |
| Bulldozer Film AS | Information & communication | 2014 |
| Bulldozer Holding AS | Information & communication | 2012 |
| Bulle Maritime AS | Transport & logistics | 2011 |
| Bullett Invest AS | | 2017 |
| Bullfighter AS | Wholesale & retail | 2022 |
| Bullinvest AS | Financial services | 1996 |
| Bullion AS | Financial services | 2004 |
| Bullitt Media AS | Professional & scientific | 2024 |
| Bullking Club AS | Wholesale & retail | 2022 |
| Bulls Pressetjeneste AS | Information & communication | 1937 |
| Bullscott AS | Financial services | 1996 |
| Bulmak AS | Construction | 2012 |
| Bulut & Co Advokatfirma AS | Professional & scientific | 2018 |
| Bumbipower AS | Information & communication | 2024 |
| Bumblebees AS | Wholesale & retail | 2023 |
| Bumerang AS | Professional & scientific | 2024 |
| Bunaderia AS | Manufacturing | 2023 |
| Bunadskredder Oslo AS | Manufacturing | 2021 |
| Bunadskulen AS | Education | 2020 |
| Bunasta Norway AS | Transport & logistics | 2026 |
| Bunde Eiendom AS | Real estate | 1992 |
| Bunde Invest AS | Real estate | 2020 |
| Bunde MK AS | Real estate | 2020 |
| Bunde Prosjekt AS | Real estate | 2010 |
| Bundebygg AS | Construction | 1991 |
| Bundegruppen AS | Construction | 1997 |
| Bungle Bungle Invest AS | | 2019 |
| Bunhill Capital AS | | 2018 |
| Bunkwang AS | | 2024 |
| Bunners Holding AS | Information & communication | 2018 |
| Bunnsolid 1 AS | | 2024 |
| Buns Burgerbar AS | Hospitality | 2014 |
| Bunuten AS | | 1989 |
| Buon AS | Information & communication | 2026 |
| Buondent AS | Health & social care | 2024 |
| Buoni Amici AS | Other services | 2003 |
| Buono Holding AS | | 2024 |
| Buoyant AS | Financial services | 2015 |
| Buraq AS | | 2023 |
| Burcado Shop AS | Wholesale & retail | 2025 |
| Bureau AS | Professional & scientific | 2021 |
| Bureau Giraffe Ans | Information & communication | 2003 |
| Bureau Holding AS | Professional & scientific | 2021 |
| Bureau Tronrud AS | Professional & scientific | 2014 |
| Bureau Veritas Norway AS | Professional & scientific | 2005 |
| Burek King AS | Hospitality | 2013 |
| Burek King Torggata AS | Hospitality | 2023 |
| Burger Bros AS | Administrative & support | 2022 |
| Burger Holmlia AS | Hospitality | 2026 |
| Burger Joint AS | Hospitality | 2014 |
| Burger Shack AS | Hospitality | 2017 |
| Burger Shack Grillhus AS | Hospitality | 2026 |
| Burger Shack Kielland AS | Hospitality | 2025 |
| Burgerbanden AS | Hospitality | 2025 |
| Burgerflipper Invest AS | Arts & recreation | 2020 |
| Burgerheim Coco AS | | 2021 |
| Burgerheim Holding AS | Manufacturing | 2020 |
| Burgern Holding AS | Real estate | 2021 |
| Burgerstation AS | Hospitality | 2026 |
| Burholsetra AS | | 2025 |
| Burkard Holding AS | Information & communication | 2024 |
| Burkeland Invest AS | Financial services | 2015 |
| Burmo HR AS | Professional & scientific | 2015 |
| Burninape Nuf | Wholesale & retail | 2024 |
| Burning Berry AS | | 2020 |
| Burrfix AS | Professional & scientific | 2016 |
| Burri Bygg Og Hage AS | Administrative & support | 2023 |
| Burson AS | Professional & scientific | 1994 |
| Burson Cohn & Wolfe AS | Professional & scientific | 1962 |
| Burud Invest AS | Financial services | 1999 |
| Burums Holding AS | | 2026 |
| Burvest Consulting AS | Professional & scientific | 2025 |
| Burvest Holdco AS | Professional & scientific | 2025 |
| Buråsen 29 AS | Real estate | 2009 |
| Buråsen 35 AS | Real estate | 2007 |