| Bli Optimal AS | Ranheim | 2021 |
| Blid AS | Oslo | 2019 |
| Blid Holding AS | Oslo | 2019 |
| Blikk Øyeklinikk AS | Oslo | 2013 |
| Blindheim Fysikalske Institutt AS | Ålesund | 2017 |
| Blindheim Legesenter AS | Ålesund | 2001 |
| Blindheim Tannlegesenter AS | Ålesund | 2016 |
| Blindleia Kiropraktikk AS | Lillesand | 2022 |
| Blink Fysioterapi AS | Porsgrunn | 2023 |
| Blink Helse AS | Porsgrunn | 2021 |
| Blissapp AS | Rådal | 2006 |
| Blodsjekk AS | Tønsberg | 2020 |
| Blomros AS | Nesøya | 2021 |
| Bloomed AS | Tromsø | 2018 |
| Blooming Life AS | Steinkjer | 2025 |
| BLS AI AS | Oslo | 2024 |
| Blue Hedge AS | Rykkinn | 1999 |
| Blueberry Well AS | Tønsberg | 2026 |
| Blå Kors Arbeid Og Inkludering AS | Oslo | 1970 |
| Blå Kors Arbeidskompetanse AS | Oslo | 2021 |
| Blå Kors Barnevern Malvik AS | Hommelvik | 2003 |
| Blå Kors Behandling AS | Oslo | 2009 |
| Blå Kors Klinikk Haugaland AS | Haugesund | 2007 |
| Blå Kors Klinikk Lade AS | Trondheim | 2007 |
| Blå Kors Klinikk Loland AS | Øvrebø | 2018 |
| Blå Kors Klinikk Skien AS | Skien | 1978 |
| Blå Kors Klinikk Tjeldsund AS | Fjelldal | 1996 |
| Blå Kors Øst AS | Oslo | 1996 |
| Blåfjelle AS | Harstad | 2018 |
| Blått Hav Holding AS | Harstad | 2010 |
| Bmbb AS | Brevik | 2011 |
| BN Familierådgivning AS | Skien | 2013 |
| Bo I Hop AS | Gaupen | 2025 |
| Bo Konsept AS | Oslo | 2025 |
| Bo Og Bistand AS | Finnsnes | 2017 |
| Bo Og Bistand Narvik AS | Finnsnes | 2026 |
| Bobbelobb Invest AS | Oslo | 2023 |
| Bodil Norgaard AS | Børsa | 2005 |
| Bodin Legekontor AS | Bodø | 2016 |
| Body 'N' Balance AS | Tønsberg | 2021 |
| Body Tuning Holding AS | Nesttun | 2020 |
| Bodycare AS | Ski | 2017 |
| Bodyfly AS | Oslo | 2012 |
| Bodyfly Helsesenter AS | Drammen | 2013 |
| Bodyfly Tromsø AS | Tromsø | 2013 |
| Bodytech AS | Kleppestø | 2009 |
| Bodø Fotklinikk AS | Bodø | 2026 |
| Bodø Fotterapisenter Da | Bodø | 2017 |
| Bodø Fysioterapi Og Osteopati AS | Bodø | 2007 |
| Bodø Gyn Da | Bodø | 2022 |
| Bodø Gynekologiske Klinikk AS | Bodø | 2013 |
| Bodø Hudlegeklinikk AS | Bodø | 2020 |
| Bodø Legetjenester AS | Bodø | 1994 |
| Bodø Manuellterapi AS | Bodø | 2010 |
| Bodø Naprapati AS | Bodø | 2025 |
| Bodø Produksjonssenter AS | Bodø | 1990 |
| Bodø Tannlegesenter AS | Bodø | 2009 |
| Bodø Terapeuticum Da | Bodø | 2004 |
| Bodøgaard Helse AS | Bodø | 2013 |
| Bofellesskapet Askervangen Hus B SA | Nesøya | 2025 |
| Bogerud Legesenter AS | Oslo | 2013 |
| Bogerud Tannhelseklinikk AS | Oslo | 2019 |
| Bogo AS | Sætre | 1987 |
| Bogstadveien Medisinske Senter AS | Oslo | 2014 |
| Bogstadveien Proteselaboratorium AS | Oslo | 2005 |
| Bogstadveien Tannlegekontor AS | Oslo | 2004 |
| Bogstadveien Tannlegesenter AS | Oslo | 1994 |
| Bogstadveien TLS Holding AS | Oslo | 2005 |
| Bohjemme AS | Bergen | 2017 |
| Bolin Care | Se-703 75 Ørebro | 2018 |
| Bolton AS | Søreidgrend | 2022 |
| Boltre AS | Eidsnes | 2023 |
| Bomed AS | Fetsund | 1990 |
| Bonaca AS | Oslo | 2022 |
| Bonagruppen AS | Oslo | 2018 |
| Bonavista AS | Bekkestua | 2000 |
| Bonavita AS | Trondheim | 2025 |
| Bondegaardsferie AS | Røyksund | 2019 |
| Bondy Consulting AS | Oslo | 2021 |
| Bonso AS | Trondheim | 2021 |
| Boonrai AS | Lierstranda | 2024 |
| Bor. Fysioterapi AS | Harstad | 2004 |
| Borch Capital Management AS | Finnsnes | 2017 |
| Borch Rove AS | Oslo | 2023 |
| Borealiz AS | Tromsø | 2014 |
| Borg Helse AS | Sarpsborg | 2023 |
| Borg Legekontor Da | Sarpsborg | 1997 |
| Borg Medical AS | Kråkerøy | 2015 |
| Borge Legesenter AS | Sellebakk | 2020 |
| Borgen Legesenter Da | Oslo | 2013 |
| Borgenhaugen Legesenter Da | Borgenhaugen | 1996 |
| Borger AS | Hønefoss | 2014 |
| Borgetun AS | Steinkjer | 2012 |
| Borgetun Da | Steinkjer | 2021 |
| Borgeåsen Legesenter Da | Skien | 2002 |
| Borgund Legekontor AS | Ålesund | 2012 |
| Borjanka AS | Oslo | 2024 |
| Borneo Ritual AS | Vigra | 2026 |
| Borning Helse AS | Løvenstad | 2021 |
| Borre Fysioterapi Og Trening AS | Borre | 2008 |