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| Birkenstock Digital GmbH | De-53577 Neustadt-Wied | 2016 |
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| Biti Da | Porsgrunn | 1997 |
| Bitibua AS | Rogne | 2013 |
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| Bitverse AS | Måløy | 2019 |
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| Bivuakk AS | Harstad | 2021 |
| Biyonafs AS | Oslo | 2023 |
| Biz Bil AS | Oslo | 2021 |
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| Bizdoc-Business Documents AS | Lysaker | 2001 |
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| BJ Company AS | Trondheim | 2008 |
| Bjaanes Holding AS | Skedsmokorset | 2021 |
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| Bjarkum AS | Oslo | 2021 |
| Bjarkøy Handel AS | Bjarkøy | 2013 |
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| Bjarne Thorud Farvehandel AS | Rjukan | 1979 |
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| Bjarøy Classic AS | Tønsberg | 2017 |
| Bjarøy Handel AS | Tønsberg | 2022 |
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| Bjelde Eiendomsselskap AS | Indre Arna | 2005 |
| Bjelde Invest AS | Indre Arna | 2005 |
| Bjelin Norway AS | Oslo | 2021 |
| Bjelland Bensin AS | Bjelland | 2016 |
| Bjelland Dagligvarer AS | Bjelland | 2005 |
| Bjerget Palé AS | Melhus | 2015 |
| Bjerglund Holding AS | Grimstad | 2024 |
| Bjerka Maskin & Scooter AS | Bjerka | 1998 |
| Bjerke Dagligvare AS | Vøyenenga | 2020 |
| Bjerke Image AS | Oslo | 1989 |