| Buråsen 2 AS | Real estate | 2017 |
| Business Center One AS | Real estate | 2026 |
| Business Coaching AS | Professional & scientific | 2016 |
| Bussperfect AS | Wholesale & retail | 2026 |
| Buster AS | Real estate | 2017 |
| Buteur AS | Education | 2023 |
| BV Eiendom Og Utleie AS | Real estate | 2014 |
| BV Trafikkskole AS | Education | 2021 |
| Bv-Holding AS | Education | 2021 |
| By the Border AS | Information & communication | 2019 |
| Bygg Og Maskin AS | Construction | 1990 |
| Bygg Sandefjord AS | Construction | 2021 |
| Bygg- Og Tømrermester Torolf Stenersen AS | Construction | 1997 |
| Byggdekor AS | Wholesale & retail | 2008 |
| Bygge-Og Rengjøringsarbeider AS | Administrative & support | 2023 |
| Byggfirma Jan Kristoffersen AS | Construction | 2012 |
| Byggfirma Rune Lillemoen AS | Construction | 2024 |
| Bygginnredning AS | Construction | 1996 |
| Byggmester Anders Jensen AS | Construction | 2018 |
| Byggmester Andersen AS | Construction | 2025 |
| Byggmester André Folkvord AS | Real estate | 2015 |
| Byggmester Brix Bygg AS | Construction | 2014 |
| Byggmester Egil Evensen AS | Construction | 2017 |
| Byggmester Erik Krister AS | Construction | 2015 |
| Byggmester Finn Jakobsen AS | Construction | 2019 |
| Byggmester Kenneth Tellefsen AS | Construction | 2022 |
| Byggmester Kim Johansen AS | Construction | 2017 |
| Byggmester Kristoffer Knutsen AS | Construction | 2025 |
| Byggmester Mathias Slydal AS | Construction | 2023 |
| Byggmester Per Ø Østerud AS | Construction | 2013 |
| Byggmester Svein Andre Torp AS | Construction | 2021 |
| Byggmester Svein Are Aasrum AS | Construction | 2000 |
| Byggmester Terje Hynne AS | Construction | 2004 |
| Byggmester Thorsen Og Hansen AS | Construction | 2017 |
| Byggmester Tom W. Kristensen AS | Construction | 2019 |
| Byggmester Undseth AS | Construction | 2005 |
| Byggmester Øystein Hansen AS | Construction | 2002 |
| Byggpartner AS | Construction | 1998 |
| Byggtekniker Sveinung Kronstad AS | Construction | 2018 |
| Byggvisualisering AS | Professional & scientific | 2012 |
| Bymel AS | Hospitality | 2025 |
| Bythe Pond AS | | 2019 |
| Bäckius Holding AS | Financial services | 2012 |
| Bäverholm Invest AS | Real estate | 1988 |
| Bård Nome AS | Health & social care | 2012 |
| Båt Og Brygge AS | Wholesale & retail | 1998 |
| Bøbakken Eiendom AS | Real estate | 2005 |
| Bøe Begravelsesbyrå AS | Other services | 2025 |
| Bøe Haugland AS | | 2025 |
| Bøe Haugland Trefelling AS | Agriculture & fishing | 2026 |
| Bøhmer Landbrukstjenester AS | Wholesale & retail | 2022 |
| Bøkelia AS | Real estate | 1997 |
| Bøljer I Byen AS | Administrative & support | 2022 |
| Børge Fagerli AS | Education | 2013 |
| Bøs Eiendom AS | Construction | 2002 |
| Bøs Invest AS | Construction | 2002 |
| C60EV AS | Arts & recreation | 2007 |
| Cadhrell AS | Information & communication | 2022 |
| Cahe AS | Wholesale & retail | 2023 |
| Caima AS | Information & communication | 2021 |
| Callister Invest AS | | 2023 |
| Calora Mooring Systems AS | Manufacturing | 2016 |
| Calorflex AS | Administrative & support | 2013 |
| Calu Invest AS | Professional & scientific | 2019 |
| Camina Invest AS | Real estate | 2013 |
| Cammas AS | Professional & scientific | 2020 |
| Campana Invest AS | | 2024 |
| Campino Sandefjord Pizza AS | Hospitality | 2023 |
| Campos Investment AS | | 2026 |
| Canada Hus AS | Construction | 2018 |
| Candia AS | Hospitality | 2013 |
| Candis Holding AS | Financial services | 2006 |
| Capitone AS | Wholesale & retail | 1987 |
| Capri Pizzahus AS | Hospitality | 2023 |
| Capricorn AS | Real estate | 1980 |
| Capricorngården AS | Real estate | 2025 |
| Captech Norge AS | Wholesale & retail | 2014 |
| Captiosus AS | Financial services | 2015 |
| Car Solutions AS | Wholesale & retail | 2017 |
| Carabellis AS | Wholesale & retail | 1983 |
| Carcloud AS | Information & communication | 2024 |
| Cardigan Invest AS | | 2022 |
| Cardsaver AS | Information & communication | 2021 |
| Cargo Magnet AS | Information & communication | 2019 |
| Cargotech Distribution AS | Wholesale & retail | 2023 |
| Carl Bjørn Frank CBF Holding AS | Professional & scientific | 1997 |
| Carl C Fon AS | Construction | 2000 |
| Carlsen Holding AS | | 2013 |
| Carnatech Ans | Wholesale & retail | 1996 |
| Casa Jewellery AS | Professional & scientific | 2022 |
| Casa Karlsen Capital Holding AS | | 2026 |
| Casa Vacanze AS | Administrative & support | 2007 |
| Casanord Group AS | Wholesale & retail | 2026 |
| Cassini Holding AS | | 2021 |
| Cassiopeia Helse AS | Health & social care | 2025 |
| Castberg Eiendom AS | Real estate | 2022 |
| Catan AS | Real estate | 2020 |
| Cazimi AS | Information & communication | 2018 |
| CB Kapital AS | Financial services | 2017 |
| CB Origo AS | Real estate | 2016 |