| Bico Bil AS | Lillestrøm | 2002 |
| Bidwintravel.Com AS | Kongsvinger | 2012 |
| Bie AS | Mandal | 2007 |
| Biestø Båt Badstue AS | Arendal | 2025 |
| Big Bite AS | Trondheim | 1992 |
| Big Brutus AS | Eidsvåg I Romsdal | 2024 |
| Big Calm Productions S.L. Nuf | Oslo | 2023 |
| Big Horn Steakhouse Norge AS | Oslo | 1997 |
| Big Mur AS | Sandefjord | 2021 |
| Big River Valley Holding AS | Koppang | 2020 |
| Big Solutions AS | Hosle | 2026 |
| Big Travel Norway AS | Oslo | 2009 |
| Big-Z Bråk Da | Volda | 2024 |
| Bigacom C.M | Se-112 51 Stockholm | 2025 |
| Bigscreen AS | Spydeberg | 2009 |
| Bigtimes AS | Stavanger | 2020 |
| Bigwall Kayaking Lysefjord | 7944 Twizel Canterburg | 2010 |
| Bikehunter AS | Sandnes | 2023 |
| Bikeloop AS | Lysaker | 2021 |
| Bikers Innovision AS | Kongsberg | 2019 |
| Bikesolutions Scandinavia AS | Trysil | 2015 |
| Biks Maskin AS | Laksevåg | 2016 |
| Biks Rent AS | Sandstad | 2023 |
| Bikuba AS | Voss | 2025 |
| Bil & Fritid AS | Halden | 1990 |
| Bil & Utstyrsutleie AS | Larkollen | 2002 |
| Bil 1 Utleie AS | Torangsvåg | 2025 |
| Bil Og Eiendomsservice Vardø AS | Evenskjer | 1994 |
| Bilauksjon AS | Oslo | 2023 |
| Bilbørsen Tromsø Bilutleie AS | Tromsø | 2018 |
| Bilcentrum Bilutleie AS | Trondheim | 1986 |
| Bildoktoren AS | Fyllingsdalen | 2020 |
| Bilexpo Da | Mjølkeråen | 2003 |
| Bilfleks 24 AS | Svolvær | 2022 |
| Bilfleks AS | Rælingen | 2025 |
| Bilforhandlerservice AS | Tranby | 2000 |
| Bilgruppen Bilutleie AS | Haugesund | 2026 |
| Bilgruppen Mobilitet AS | Haugesund | 2026 |
| Biljard Miljø Vest Ans | Os | 2004 |
| Biljardsport Norge Ans | Oslo | 2005 |
| Bilkilden Leasing AS | Stavanger | 2020 |
| Bilkollektivet SA | Oslo | 1995 |
| Billaget Invest AS | Suldalsosen | 2009 |
| Billerud Maskin & Transport AS | Matrand | 2013 |
| Billettkontoret TICKET2TRAVEL AS | Oslo | 2001 |
| Billetto AS | Oslo | 2010 |
| Billettservice AS | Oslo | 1977 |
| Bilmesser.No AS | Skien | 2026 |
| Bilnå AS | Lillestrøm | 2026 |
| Bilpartner Namsos AS | Spillum | 1995 |
| Bilservice 360 AS | Laksevåg | 2022 |
| Bilstad Contracting AS | Sandnes | 2026 |
| Biltunet Utleige AS | Skulestadmo | 2019 |
| Biltur Da | Bergen | 2021 |
| Bilutleie 1 Drift AS | Molde | 2025 |
| Bilutleie 1 Norge AS | Molde | 2009 |
| Bilutleie Arendal AS | Saltrød | 2021 |
| Bilutleie AS | Straume | 2022 |
| Bilutleie Grenland AS | Porsgrunn | 1995 |
| Bilutleie I Lofoten AS | Gravdal | 2024 |
| Bilutleie Mosjøen AS | Mosjøen | 1998 |
| Bilutleie Nord Troms Da | Storslett | 2006 |
| Bilutleie Partner AS | Dalekvam | 2021 |
| Bilutleie Vesterålen Bil AS | Sortland | 2012 |
| Bilzone AS | Tromsø | 2022 |
| Bim Verdi AS | Oppegård | 2012 |
| Bimco Informatique | 2880 Bagsværd | 2018 |
| Binks Overseas Nordic Aps Nuf | Dk-7490 Aulum | 2024 |
| Bins AS | Oslo | 2021 |
| Bio Landskap AS | Trondheim | 2016 |
| Bioinvent Holding AS | Oslo | 2022 |
| Biomarine Organization Limited | Hk- Kowloon, Hong Kong | 2016 |
| Biomass Da | Moen | 2002 |
| Biomedisinsk Helse AS | Oslo | 2010 |
| Bion AS | Ølen | 2014 |
| Biorent AS | Meldal | 2024 |
| Bird Rides Norway AS | Oslo | 2019 |
| Birdie Lounge AS | Ålesund | 2024 |
| Birdiehuset AS | Fevik | 2020 |
| Birdiemaker AS | Trondheim | 2024 |
| Birger N. Haug Bilutleie AS | Oslo | 1986 |
| Birgits Florida AS | Ulnes | 2012 |
| Birke Invest AS | Oppegård | 2007 |
| Birkeland Fløgstad Maskin AS | Sauda | 2020 |
| BIRKELAND TRANSPORT ANS Jan Egil og Hans Birkeland | Vikedal | 1995 |
| Birkenåsen Driftsselskap AS | Jessheim | 2024 |
| Birtavarre Samfunnshus SA | Birtavarre | 1980 |
| Birwelco Ltd | West Midlands B62 8Dg England | 1998 |
| Bisi Services AS | Hafrsfjord | 2019 |
| Bislab AS | Oslo | 2022 |
| Bislab Holding AS | Oslo | 2023 |
| Bislet Bildeling AS | Oslo | 2019 |
| Bislet Trading AS | Halden | 1986 |
| Bislet Vaktmesterselskap Da | Oslo | 1993 |
| Bisnode D&B Norway AS | Oslo | 1983 |
| Bison TM AS | Drammen | 2016 |
| Bit of Norway | Melsomvik | 2015 |
| Bit Union AS | Oslo | 2015 |
| Biteco AS | Skjåk | 2008 |
| Biteko Bygg AS | Skjåk | 2023 |