| Bishal Holding AS | Transport & logistics | 2024 |
| Bisk AS | | 2020 |
| Biskop Gunnerus' Gate 14A AS | Real estate | 2001 |
| Biskop Gunnerus' Gate 6 AS | Real estate | 2014 |
| Biskop Jens Nilssønsgt AS | Real estate | 2007 |
| Bislab AS | Administrative & support | 2022 |
| Bislab Holding AS | Administrative & support | 2023 |
| Bislab Intelligence AS | Information & communication | 2023 |
| Bislet Bad Og Trening AS | Arts & recreation | 2010 |
| Bislet Bildeling AS | Administrative & support | 2019 |
| Bislet Bok AS | Wholesale & retail | 1993 |
| Bislet Film AS | Information & communication | 2025 |
| Bislet Fruktlager Da | Wholesale & retail | 1993 |
| Bislet Garasjehus AS | Real estate | 2017 |
| Bislet Limousine AS | Transport & logistics | 1989 |
| Bislet Regnskapsservice Ans | Professional & scientific | 1988 |
| Bislet Rør AS | Construction | 1995 |
| Bislet Vaktmesterselskap Da | Administrative & support | 1993 |
| Bislett Blomster AS | Wholesale & retail | 2017 |
| Bislett Blomster Service AS | Wholesale & retail | 2020 |
| Bislett Bolig AS | Real estate | 2021 |
| Bislett Dagligvarebutikk AS | Wholesale & retail | 2026 |
| Bislett Dagligvarer AS | Wholesale & retail | 2025 |
| Bislett Delikatesse AS | Wholesale & retail | 2022 |
| Bislett Eiendom AS | Real estate | 2016 |
| Bislett Eiendomsforvaltning AS | Real estate | 2018 |
| Bislett Eiendomsmegling AS | Real estate | 2016 |
| Bislett Eiendomsmegling Holding AS | | 2025 |
| Bislett Frisør Da | Other services | 2012 |
| Bislett Hudpleie AS | Other services | 2006 |
| Bislett Håndverkscompagnie AS | | 2023 |
| Bislett Invest AS | | 2021 |
| Bislett Kebab House AS | Hospitality | 2012 |
| Bislett Kebab House Drift AS | Hospitality | 2017 |
| Bislett Pizza AS | Hospitality | 2025 |
| Bislett Studio Da | Information & communication | 2018 |
| Bislett Øyekirurgiske Klinikk AS | Health & social care | 2014 |
| Bislett Øyelegesenter AS | Health & social care | 2014 |
| Bislettbekken - Sio Barnehage AS | Education | 2022 |
| Bislingen Turisthytter AS | Real estate | 2021 |
| Bisma AS | | 2024 |
| Bismart International AS | Professional & scientific | 2012 |
| Bismi AS | | 2023 |
| Bismus AS | | 2021 |
| Bisnils Holding AS | | 2026 |
| Bisnode D&B Norway AS | Administrative & support | 1983 |
| Biso Kroa AS | Hospitality | 2015 |
| Bisonlab AS | Information & communication | 2014 |
| Bispengsgaten 19 AS | Real estate | 2013 |
| Bispevika AS | Hospitality | 2023 |
| Bispevika B8B Barnehage AS | Real estate | 2021 |
| Bispevika B8B Bolig AS | Real estate | 2021 |
| Bispevika B8B FBK AS | Real estate | 2018 |
| Bispevika B9 Bolig AS | Real estate | 2021 |
| Bispevika B9 FBK AS | Real estate | 2021 |
| Bispevika Energisentral AS | Energy | 2021 |
| Bispevika Nord P-Hus AS | Real estate | 2020 |
| Bispevika Portfolio AS | Real estate | 2017 |
| Bistaa AS | Professional & scientific | 2020 |
| Bistand AS | Professional & scientific | 2017 |
| Bistroeconomics AS | Information & communication | 2018 |
| Bit AS | Hospitality | 2010 |
| Bit Factory AS | Information & communication | 2011 |
| Bit Norge AS | Hospitality | 2006 |
| Bit Union AS | Administrative & support | 2015 |
| BIT4BIT AS | Information & communication | 2016 |
| Bitch Da | Hospitality | 2004 |
| Bitco Invest AS | | 2022 |
| Bitdeer Hustadvika AI Technology AS | Information & communication | 2026 |
| Bitdeer Norway AS | Information & communication | 2018 |
| Bitdeer Tydal AI Infrastructure AS | Information & communication | 2026 |
| Bitdrop AS | Education | 2013 |
| Biterud AS | Real estate | 2013 |
| Bitfjord AS | Information & communication | 2025 |
| Bitflip AS | Information & communication | 2023 |
| Bitfloww Nordics AS | Information & communication | 2023 |
| Bitfocus AS | Information & communication | 2024 |
| Bitgate AS | Professional & scientific | 2017 |
| Bitgate Services AS | Information & communication | 2019 |
| Bitguana (Norsk Operativ Region) AS | Information & communication | 2017 |
| Bitihorn Eiendom AS | Real estate | 2012 |
| Bitoris AS | Information & communication | 2023 |
| Bitpeople Norway AS | Information & communication | 2010 |
| Bitpet AS | Information & communication | 2020 |
| Bitplane Holding AS | | 2026 |
| Bitpulse AI AS | Information & communication | 2024 |
| Bitringsnatten AS | | 2020 |
| Bitruption AS | Information & communication | 2018 |
| Bits & PCS AS | Financial services | 2018 |
| Bits and Pieces AS | Real estate | 2005 |
| Bits AS | Financial services | 2016 |
| Bits Holding AS | | 2018 |
| Bitscale AS | Information & communication | 2026 |
| Bitspace AS | Information & communication | 2016 |
| Bitte Kai Rand & Co Norge AS | Wholesale & retail | 2011 |
| Bitte- R Holding AS | Financial services | 2005 |
| Bitteborgen AS | Real estate | 1996 |
| Bitteliten Barnehager AS | Education | 2005 |
| Bitteliten Brattvoll Familiebarnehage AS | Education | 2023 |
| Bitteliten Karlsrud Familiebarnehage AS | Education | 2023 |