| Blue Concept AS | Real estate | 2000 |
| Blue Concept HLD AS | Professional & scientific | 2024 |
| Brdy Holding AS | Information & communication | 2024 |
| Bromanders Håndverk AS | Construction | 2025 |
| Brynsløkken AS | Manufacturing | 2004 |
| Brå Stopp AS | Hospitality | 2009 |
| Brødrene Authen Samdrift Da | Real estate | 2016 |
| Brødrene Lorentzen AS | Wholesale & retail | 1921 |
| Butikkdesign Norge AS | Wholesale & retail | 2014 |
| Byge Bad Og Kjøkken AS | Wholesale & retail | 2024 |
| Bygg Og Tømrerfirma Alexander Hagen AS | Construction | 2024 |
| Byggexperten Da | Construction | 2005 |
| Byggkunnskap AS | Professional & scientific | 2023 |
| Byggkvalitet AS | Construction | 2025 |
| Byggsmil AS | Professional & scientific | 2021 |
| Bylterud Renovasjon SA | Water & waste | 2017 |
| Berema A/S | Wholesale & retail | 1968 |
| C&T Landskap AS | Administrative & support | 2025 |
| Cafio Holding | Information & communication | 2023 |
| Campher Holdings AS | Construction | 2026 |
| Canis Holding AS | | 2026 |
| Car Market AS | Wholesale & retail | 2025 |
| Car Rental AS | Administrative & support | 2024 |
| Car-A-Maskin AS | Wholesale & retail | 2014 |
| Cauponor AS | Professional & scientific | 2007 |
| CC Byggservice AS | Construction | 2024 |
| Central European Aviation Cluster AS | Real estate | 2019 |
| CF Maskin Follo AS | Wholesale & retail | 2002 |
| CHEP NORWAY Norsk avdeling av utenlandsk foretak NUF | Administrative & support | 1997 |
| Chopan Grill & Pizza AS | Hospitality | 2022 |
| Christian AS | Real estate | 2015 |
| Christiania Byggteknikk AS | Manufacturing | 1964 |
| Cleansense AS | Administrative & support | 2025 |
| CNC Invest AS | | 2021 |
| Colibri Helicopter AS | Administrative & support | 2002 |
| Collicare Distribution AS | Transport & logistics | 2023 |
| Collicare Holding AS | Transport & logistics | 2020 |
| Collicare Logistics AS | Transport & logistics | 1999 |
| Collicare Solutions AS | Transport & logistics | 2023 |
| Complex Bygg AS | Construction | 2022 |
| Cosentino Norway AS | Professional & scientific | 2012 |
| Cozy Designs AS | Wholesale & retail | 2024 |
| Cut'N Go Vestby AS | Other services | 2021 |
| D.A Holding AS | | 2023 |
| Dagu AS | Real estate | 2006 |
| Danbekk Holding AS | Professional & scientific | 2021 |
| Daniel Isaksen Holding AS | | 2021 |
| Daniel Thømt Drift AS | Wholesale & retail | 2022 |
| Daraman Consulting AS | Information & communication | 2023 |
| Daraman Holding AS | Information & communication | 2021 |
| DD Løsninger AS | Administrative & support | 2022 |
| Dehli Holding AS | | 2026 |
| Dekahus AS | Construction | 2022 |
| Demite Holding AS | | 2026 |
| Dental Miljø Teknikk AS | Wholesale & retail | 2026 |
| Dentsolution AS | Wholesale & retail | 2008 |
| Diamond Holding AS | | 2021 |
| Diamond Transport AS | Transport & logistics | 2023 |
| Diversøren AS | Professional & scientific | 2024 |
| DK Bedrift AS | Professional & scientific | 2003 |
| DK Gruppen AS | Wholesale & retail | 2009 |
| Dog Stylist AS | Other services | 2023 |
| Dr.Asady AS | Health & social care | 2025 |
| Driftsbygg AS | Administrative & support | 2020 |
| Drive 4 AS | Transport & logistics | 2023 |
| Drøbak Regnskapsservice AS | Professional & scientific | 1998 |
| DSV Contract Logistics AS | Transport & logistics | 2001 |
| DSV Road AS | Transport & logistics | 1960 |
| Duck & Duck AS | Information & communication | 2024 |
| Dwmedia AS | Wholesale & retail | 2023 |
| Dybwads Gate 8 AS | Real estate | 2024 |
| Dyrløkkeveien 13 AS | Real estate | 1986 |
| Ear Estate AS | Real estate | 2007 |
| Easy Trade AS | Wholesale & retail | 2015 |
| Ebano Norge AS | Professional & scientific | 1994 |
| Eco Water AS | Manufacturing | 1991 |
| Efas Eiendom AS | Real estate | 2018 |
| Efas Group AS | Wholesale & retail | 2018 |
| Egeland Drift AS | Administrative & support | 2025 |
| Eico AS | Wholesale & retail | 1996 |
| Ekam Gill AS | Hospitality | 2017 |
| Ekea.No AS | Wholesale & retail | 2019 |
| Ekerholt Eiendom AS | Real estate | 2020 |
| Ekerholt Holding AS | | 2022 |
| Ekspeditt AS | Transport & logistics | 2017 |
| Ela Invest AS | | 2025 |
| Elbil Norge AS | Wholesale & retail | 2026 |
| Eldy Holding AS | | 2025 |
| Elektrikergutta AS | Construction | 2025 |
| Elektrisk Kompagni AS | Construction | 2012 |
| Elisof AS | Transport & logistics | 2024 |
| Elvestad Invest AS | Real estate | 2008 |
| Engelund Termofrakt AS | Transport & logistics | 1996 |
| Engene Vannverk SA | Water & waste | 1975 |
| Enomia AS | Information & communication | 2025 |
| Enøkportalen AS | Professional & scientific | 2023 |
| Epg No Holdco AS | | 2025 |
| Epiroc Norge AS | Wholesale & retail | 1989 |
| Eurobiological AS | Wholesale & retail | 2022 |
| Eurofusion AS | Wholesale & retail | 2018 |