| Boiler Buddy AS | Professional & scientific | 2020 |
| Bokstavelig AS | Professional & scientific | 2021 |
| Borgheim Driftsbygg AS | Real estate | 2009 |
| Boro Holding AS | | 2023 |
| Bouncyrock AS | Information & communication | 2017 |
| Bra Bil AS | Wholesale & retail | 2019 |
| Brattbakken 1 AS | Real estate | 2014 |
| Brattås Barnehage AS | Education | 2009 |
| Bratås AS | Construction | 2010 |
| Bratås Drift AS | Construction | 2022 |
| Bratås Holding AS | Real estate | 2019 |
| Bridging Impact Academy AS | Education | 2023 |
| Bruddet Kulturpark AS | Real estate | 2018 |
| Brygga I Tønsberg AS | Information & communication | 2020 |
| Brødrene Bjertnæs Ans | Real estate | 1994 |
| Brødrene Freberg Da | Agriculture & fishing | 2012 |
| Brøtsøbruddet AS | Real estate | 2013 |
| Bulklift AS | Wholesale & retail | 1995 |
| Buskerud Byggisolering 2 AS | Real estate | 2007 |
| Buskerud Byggisolering 3 AS | Real estate | 2007 |
| Butikkforum Da | Information & communication | 2007 |
| Bygghjemme Norge AS | Wholesale & retail | 2008 |
| Byggmester Bjørn Engen AS | Wholesale & retail | 1990 |
| Byggmester Snekkestad AS | Construction | 2021 |
| Byggmester Terje Heimdal AS | Construction | 2007 |
| Byggradar AS | Professional & scientific | 2025 |
| Borgheim Sentrumsbygg AS | Real estate | 1978 |
| Bækholt AS | Information & communication | 2012 |
| C Reiersdal AS | | 2024 |
| Cabletanker AS | Professional & scientific | 2014 |
| Cage Ctrl AS | Professional & scientific | 2020 |
| Cally AS | Administrative & support | 2023 |
| Calma AS | Wholesale & retail | 2005 |
| Calor-Celsius Norge AS | Professional & scientific | 1977 |
| Cammar Holding AS | Construction | 2013 |
| Capitis Invest AS | | 2019 |
| Caribbean Sustainable Aquaculture Holding (Csa) AS | | 2022 |
| Cavern AS | | 2022 |
| Cba Holding AS | Real estate | 2018 |
| CCG Holding AS | Financial services | 2006 |
| Celvica Invest AS | Real estate | 2014 |
| Centrum Glass AS | Construction | 1989 |
| CGR Arctic Marine AS | Wholesale & retail | 2006 |
| Champ Eiendom AS | Real estate | 2021 |
| Champ Holding AS | Wholesale & retail | 2005 |
| Chll AS | Wholesale & retail | 2026 |
| Chmr Invest AS | Financial services | 2014 |
| Chrisco Estate AS | Real estate | 2007 |
| Christensen & Mathisen AS | Construction | 1991 |
| Cirenita AS | Real estate | 2020 |
| Clean Fill AS | Wholesale & retail | 2024 |
| Co-Ideation AS | Professional & scientific | 2019 |
| Color Malerservice AS | Construction | 2021 |
| Compile AS | Information & communication | 2018 |
| Consultpdd AS | Professional & scientific | 2022 |
| Cooltray AS | Wholesale & retail | 2019 |
| Cordinator Da | Administrative & support | 1996 |
| Corwal AS | Wholesale & retail | 2022 |
| Cosmet AS | Wholesale & retail | 2023 |
| Covey Network AS | Professional & scientific | 2023 |
| CSJ AS | | 2020 |
| Cubic Invest AS | Financial services | 2005 |
| CVR Holding AS | | 2025 |
| D&V Eiendom AS | Real estate | 2016 |
| Dagit AS | Information & communication | 2021 |
| Daler Polaris AS | Professional & scientific | 2026 |
| Daler Polaris Limited Nuf | Professional & scientific | 2009 |
| Danholmen 19 AS | Real estate | 1985 |
| Danholmen 25 AS | Real estate | 2000 |
| Davess AS | Real estate | 1998 |
| De-Je AS | | 2022 |
| Debet AS | Information & communication | 2005 |
| DHN15 AS | Real estate | 2017 |
| Digart AS | Professional & scientific | 1986 |
| Digeråsen Hytteutvikling AS | Real estate | 1998 |
| Divetech Norway AS | Wholesale & retail | 2013 |
| Dksr Holding AS | Real estate | 2016 |
| Dobbel K Invest AS | | 2021 |
| Dogsafe AS | Professional & scientific | 2017 |
| DR Singh Hudklinikk AS | Health & social care | 2024 |
| DR. Fanebust AS | Health & social care | 2020 |
| DR. Lind Jørgensen AS | Health & social care | 2013 |
| Dream Clean AS | Administrative & support | 2012 |
| Dream Design Da | Information & communication | 2001 |
| Drift Og Vedlikehold AS | Other services | 2012 |
| Drift.No AS | Administrative & support | 2013 |
| Driving Trafikkskole AS | Education | 2014 |
| Duken Eiendom AS | Real estate | 2015 |
| Duolike AS | Information & communication | 2020 |
| E Eiendom AS | Real estate | 2019 |
| Ebc Holding AS | | 2023 |
| Eco Tide Group AS | Agriculture & fishing | 2025 |
| Ecolove Holding AS | Professional & scientific | 2021 |
| Eddybygg AS | Construction | 2019 |
| Edgeon AS | Information & communication | 2026 |
| Edvardsen Bygg & Eiendom AS | Construction | 2022 |
| Eh Med AS | | 2026 |
| Eiendom Group AS | Real estate | 1998 |
| Eigil Holding AS | Real estate | 2005 |
| Einang.Net AS | Manufacturing | 2000 |