| Bosk Medinvest I AS | Wholesale & retail | 2018 |
| Bosk Medinvest II AS | Wholesale & retail | 2018 |
| Braamo AS | Real estate | 2005 |
| Braape Invest AS | | 2020 |
| Braco Eiendom AS | Manufacturing | 1992 |
| Brainvest AS | Professional & scientific | 2018 |
| Brandt Gruppen AS | Professional & scientific | 2011 |
| Branorway AS | Information & communication | 2015 |
| Brevetti AS | Wholesale & retail | 2015 |
| Bring Linehaul Bildrift AS | Transport & logistics | 2019 |
| Bry Omsorg AS | Health & social care | 2022 |
| Bryggeriveien 5 AS | Real estate | 2006 |
| Budor Eiendom AS | Real estate | 2005 |
| Buen Restaurant & Bar AS | Hospitality | 2014 |
| Bukkerittet Invest AS | | 2000 |
| Bukkerittet Invest II AS | Financial services | 2008 |
| Bulycke Enginering Dahlberg | Construction | 2002 |
| Bunnpris Skårer AS | Wholesale & retail | 2017 |
| Business Push AS | Professional & scientific | 2020 |
| Butikkdrift Dua Ibrar AS | Wholesale & retail | 2023 |
| Butikkdrift Hoff AS | Wholesale & retail | 2025 |
| BX Transport AS | Transport & logistics | 2021 |
| By Pernille AS | Wholesale & retail | 2022 |
| Bygg & Bad Gruppen AS | Construction | 2016 |
| Bygg & Tømrer Tjenester AS | Construction | 2025 |
| Bygg Og Eiendom Vedlikehold AS | Construction | 2019 |
| Byggdrift Kompetanse AS | Education | 2026 |
| Byggteam Oslo AS | Construction | 2019 |
| C K Invest AS | Wholesale & retail | 1992 |
| Cambria Holding AS | | 2024 |
| Capa Capital AS | Professional & scientific | 2019 |
| Capittl AS | Professional & scientific | 2026 |
| Captus AS | Professional & scientific | 2006 |
| Casa Di Pasta AS | Hospitality | 2025 |
| Ccep Holdings Norge AS | Manufacturing | 2010 |
| CD Du AS | Real estate | 2003 |
| CDS Norge AS | Wholesale & retail | 1930 |
| Cech Holding AS | | 2021 |
| Cecilie a. Løvdal AS | Wholesale & retail | 2007 |
| Celma AS | Wholesale & retail | 2012 |
| Celma Eiendom AS | Real estate | 2023 |
| Centro Bil AS | Wholesale & retail | 2025 |
| Centrum Legekontor Lørenskog AS | Administrative & support | 2025 |
| Cevinto AS | Real estate | 2006 |
| Charlie Storm Messel AS | Wholesale & retail | 1970 |
| Chopstix Restaurant AS | Hospitality | 2017 |
| Christensen Kran Og Transport AS | Transport & logistics | 2016 |
| Christin Dagligvare AS | Wholesale & retail | 2024 |
| Chrisvic Prosjekt AS | Professional & scientific | 2017 |
| Chrr AS | Administrative & support | 2018 |
| Cindro AS | Information & communication | 2025 |
| Cipi Holding AS | | 2026 |
| Clinic 112 Varda Baig AS | Health & social care | 2013 |
| Coca-Cola Europacific Partners Norge AS | Manufacturing | 1996 |
| Coca-Cola Norge AS | Professional & scientific | 1979 |
| Coghinas AS | Real estate | 2023 |
| Colorfuel AS | Information & communication | 2025 |
| Commodore Consulting AS | Information & communication | 2005 |
| Compethic AS | Information & communication | 2025 |
| Compli AS | Information & communication | 2026 |
| Con-Eiendom AS | Real estate | 2015 |
| Con-Rehab AS | Construction | 2015 |
| Concrete Holding AS | Construction | 2016 |
| Condis Lørenskog AS | Arts & recreation | 2004 |
| Confidential Risk Control AS | Professional & scientific | 2012 |
| Confused Baked Potato AS | Hospitality | 2025 |
| Constera AS | Real estate | 2023 |
| Contero Invest AS | | 2025 |
| Cool Invest AS | | 2020 |
| Creativework AS | Information & communication | 2025 |
| Creatorhub AS | Information & communication | 2026 |
| Critical Infrastructure Services AS | Professional & scientific | 2021 |
| Crossfit Lørenskog AS | Arts & recreation | 2018 |
| Cube House Norway AS | Construction | 2020 |
| Dag Renholdservice AS | Administrative & support | 2023 |
| Dagens Media AS | Professional & scientific | 2023 |
| Dahl Eiendom Holding AS | Real estate | 1997 |
| Dam Eiendom AS | Real estate | 2020 |
| Danart Eiendom AS | Real estate | 2026 |
| Danbolt Da | Education | 1999 |
| Dandiep Invest AS | Real estate | 2018 |
| Danila Transport AS | Administrative & support | 2025 |
| Darkspeed AS | Information & communication | 2026 |
| Data Center Installations AS | Professional & scientific | 2021 |
| Datapartner Agder AS | Information & communication | 2005 |
| Dayone AS | Wholesale & retail | 2003 |
| DD Bad Og Bygg AS | Construction | 2022 |
| Ddesign AS | Real estate | 2026 |
| Decor House AS | Professional & scientific | 2021 |
| Delichon AS | Information & communication | 2012 |
| Dems Office Nuf | Professional & scientific | 2016 |
| Dental Studio Lørenskog Tannklinikk AS | Health & social care | 2024 |
| Dentalestetic AS | Health & social care | 2016 |
| Depmes AS | Arts & recreation | 2019 |
| Designklipp Frisører AS | Other services | 2013 |
| Det Lille Ekstra Da | Wholesale & retail | 1994 |
| Dete AS | Real estate | 2004 |
| Deutero AS | Arts & recreation | 2002 |
| Dev Bygg AS | Construction | 2021 |
| Dica Tools AS | Wholesale & retail | 1933 |