| Besto AS | Real estate | 2022 |
| Bex Ecom LLC Nuf | Wholesale & retail | 2026 |
| Bexrud Bil AS | Wholesale & retail | 2023 |
| Bexrud Invest AS | Real estate | 1999 |
| Bia Invest AS | Manufacturing | 2005 |
| Bibo AS | Wholesale & retail | 2001 |
| Bibo Invest AS | | 2001 |
| Bimu AS | Professional & scientific | 2020 |
| Biomed Consulting AS | Professional & scientific | 1998 |
| Biringvad Eiendom AS | Agriculture & fishing | 2013 |
| Bistro Servering AS | Hospitality | 2024 |
| Bjarne Helgesen Holding AS | Information & communication | 2024 |
| Bjii AS | Professional & scientific | 2025 |
| Bjørn Gregersen AS | Construction | 1986 |
| Bjørnsen-Maskin AS | Construction | 2016 |
| BL Bil AS | Wholesale & retail | 2010 |
| Black-Bay Spring Tea | Wholesale & retail | 2009 |
| Blickle Norge AS | Wholesale & retail | 1989 |
| Blink Media Marketing Da | Professional & scientific | 2024 |
| BLM Invest AS | | 2020 |
| Bo Og Hage Service AS | Administrative & support | 2024 |
| Bobbies AS | | 2024 |
| Bodmannen AS | Real estate | 2023 |
| Boierviga Holding AS | Real estate | 2006 |
| Bojo AS | Real estate | 2024 |
| Bonett Invest AS | | 2025 |
| Book Holding AS | | 2022 |
| Borge Maskin Og Landbruk AS | Construction | 2020 |
| Borge Maskinstasjon AS | Agriculture & fishing | 2024 |
| Borre Eiendom AS | Real estate | 2010 |
| Borre Golfbane AS | Arts & recreation | 1989 |
| Borre Maskin AS | Agriculture & fishing | 2021 |
| Borre Steinhoggeri AS | Manufacturing | 1979 |
| Borrebrygg AS | Wholesale & retail | 2013 |
| Borreveien Supermarked AS | Wholesale & retail | 2000 |
| Borro AS | Information & communication | 2022 |
| Borro Holding AS | Information & communication | 2023 |
| Botanica Borre AS | Wholesale & retail | 2014 |
| Bottolfsen Holding AS | | 2026 |
| Boxhouse AS | Real estate | 2020 |
| Bra&Bo AS | Real estate | 2005 |
| Braser AS | Professional & scientific | 2017 |
| BRO25 AS | Real estate | 2024 |
| Broen Eiendom AS | Real estate | 2005 |
| Bromsveien 19 AS | Real estate | 1984 |
| Bromsveien 31 AS | Real estate | 2022 |
| Bromsveien 5 AS | Real estate | 2026 |
| Bromsveien 5 Eiendom AS | Real estate | 2026 |
| Bromsveien 9 AS | Real estate | 1984 |
| Bruun & Partners Consultant AS | Professional & scientific | 1993 |
| Bryme Invest AS | | 2025 |
| Buskerud Taxi AS | Transport & logistics | 2015 |
| Bygg 121 AS | Hospitality | 2016 |
| Byggeveilederen AS | Professional & scientific | 2012 |
| Byggmester Svein Jacobsen AS | Construction | 2023 |
| Bromsveien 11 AS | Real estate | 1977 |
| Båt & Motor Senteret AS | Manufacturing | 2000 |
| Bærgutta AS | Wholesale & retail | 2020 |
| C Andersensgate 11 a AS | Real estate | 2007 |
| C Kristoffersen & Sønn AS | Construction | 2003 |
| C Kristoffersen Fargehandel AS | Wholesale & retail | 2003 |
| C Kristoffersen Holding AS | | 1971 |
| Cafe Con Bar AS | Hospitality | 2025 |
| Caleta Holding AS | | 2022 |
| Camiki AS | Education | 2020 |
| Campino Pizzeria Og Grill AS | Hospitality | 2025 |
| Camz AS | Wholesale & retail | 2016 |
| Capasand AS | Health & social care | 2007 |
| Captiva Eiendom AS | Real estate | 2005 |
| Caravanning Expo Norway AS | Administrative & support | 2023 |
| Cath's Resurs & Service AS | Professional & scientific | 2022 |
| Cathrine Midtgård - Impact AS | Education | 2021 |
| Ceb Investment AS | Real estate | 2018 |
| Cecilie Nilsen Holding AS | Health & social care | 2021 |
| Cecilies Trimsalong Ans | Arts & recreation | 1996 |
| Cemento Vestfold AS | Construction | 2022 |
| Centrum Bygg Horten AS | Construction | 1992 |
| CFN Holding AS | | 2022 |
| Circuit Midco AS | | 2025 |
| Circuit Topco AS | | 2025 |
| Cleopatra Mote AS | Wholesale & retail | 2020 |
| CLK Holding AS | Wholesale & retail | 2020 |
| Comma AS | Administrative & support | 2012 |
| Complementum AS | Professional & scientific | 2021 |
| Comsec Halo AS | Information & communication | 2025 |
| Confundo AS | Professional & scientific | 2016 |
| Confundo Holding AS | Professional & scientific | 2020 |
| Conva AS | Professional & scientific | 2022 |
| Cordelia Sail AS | Administrative & support | 2024 |
| Dahle Invest Holding AS | | 2020 |
| DAY1SPORT AS | Information & communication | 2018 |
| DCH AS | | 2020 |
| De Facto AS | Professional & scientific | 1996 |
| Dermasupply AS | Wholesale & retail | 2021 |
| Device AS | Wholesale & retail | 2013 |
| Devik Direct AS | | 2014 |
| Digiassist Måbø AS | Wholesale & retail | 2025 |
| Digital Holding AS | | 2025 |
| Din Hvile AS | Education | 2021 |
| Din Partner Norge Ans | Professional & scientific | 1996 |