| Chimera Events AS | Arts & recreation | 2024 |
| Chimeras AS | Professional & scientific | 2024 |
| China Classification Society Nuf | Professional & scientific | 2014 |
| China Palace AS | Hospitality | 1989 |
| Chinati Marine Management AS | Wholesale & retail | 2014 |
| Chipoco Solutions AS | | 2025 |
| CHR Irgens Sønner AS | Real estate | 2005 |
| CHR Irgens Sønner Holding AS | Real estate | 1987 |
| CHR Michelsensgt 6 AS | Real estate | 2009 |
| CHR Salvesen & CHR Thams's Communications Aktieselskab | Energy | 1898 |
| CHR. Krohgs Gate 32 AS | Real estate | 2016 |
| Chrihema AS | | 2025 |
| Christel Invest AS | Financial services | 2008 |
| Christian Busch AS | Health & social care | 2010 |
| Christian Michelsens Eiendom AS | Real estate | 2014 |
| Christian Michelsens Gate 1-3 AS | Real estate | 2024 |
| Christian Michelsens Gate 7 AS | Real estate | 2006 |
| Christian Rasmussen Holding AS | Real estate | 2016 |
| Christian Stene AS | | 2024 |
| Christiania Taxi Bergen AS | Transport & logistics | 2013 |
| Christie AS | | 2010 |
| Christies Gate 13 AS | Real estate | 2019 |
| Christies Gate 14 AS | Real estate | 2000 |
| Christin Eide Photography AS | Professional & scientific | 2018 |
| Christina Brudvik Holding AS | | 2025 |
| Christinegaard Hovedgaard AS | Hospitality | 2008 |
| Christophersen Holding AS | | 2025 |
| Château Beauséjour AS | Real estate | 2013 |
| Cicero Publisher and Consulting AS | Information & communication | 2013 |
| Cicignon Estate AS | Real estate | 2026 |
| Cicignon Holding a AS | Real estate | 2026 |
| Cicignon Holding B AS | Real estate | 2026 |
| Cielo Bergen AS | Wholesale & retail | 2006 |
| Cimok AS | Real estate | 2005 |
| Cimter AS | Professional & scientific | 2015 |
| Cinch Medical AS | Professional & scientific | 2023 |
| Cinclus Eiendom AS | Real estate | 2000 |
| Cinefile AS | Administrative & support | 2026 |
| Cinterai AS | Professional & scientific | 2022 |
| Cipher Bergen AS | Professional & scientific | 2020 |
| Cipher Holding AS | Professional & scientific | 2020 |
| Cipher Power to the People AS | | 2022 |
| Cipieres AS | | 2023 |
| Cipieres II AS | | 2024 |
| Circadian Eyewear AS | Manufacturing | 2017 |
| Circula AS | Water & waste | 2026 |
| Cirrus AS | | 2021 |
| Cisne Negro AS | | 2020 |
| Cisoeghe AS | | 2023 |
| City Center Properties AS | Real estate | 2007 |
| City Hostel Bergen AS | Hospitality | 2011 |
| City Invest AS | Real estate | 2013 |
| City of Friends AS | Professional & scientific | 2008 |
| City Sea Sauna AS | Arts & recreation | 2020 |
| City Sightseeing Bergen AS | Transport & logistics | 2009 |
| City Trafikkskole AS | Education | 2004 |
| Citybox AS | Administrative & support | 2006 |
| Citybox Bergen AS | Hospitality | 2006 |
| Citybox Danmarksplass AS | Hospitality | 2018 |
| Citybox Eiendom AS | Real estate | 2020 |
| Citybox Hotels Helsinki OY Nuf | Administrative & support | 2026 |
| Citybox Stockholm AB Nuf | Administrative & support | 2026 |
| Citybox Tallinn Oü | Administrative & support | 2026 |
| Citybox Tromsø AS | Hospitality | 2020 |
| Citycardnorway AS | Information & communication | 2023 |
| CJ Kapital AS | | 2024 |
| Cjls AS | Wholesale & retail | 2015 |
| CJM AS | Financial services | 2018 |
| CJM Holding AS | Financial services | 2014 |
| CK Astor AS | Professional & scientific | 2018 |
| CKH Consulting Norge AS | Information & communication | 2009 |
| Ckleven Holding AS | | 2023 |
| CKS AS | | 2019 |
| Clara Venture Labs AS | Professional & scientific | 1988 |
| Clariant International AG | Wholesale & retail | 2007 |
| Clariant Oil Services Scandinavia AS | Wholesale & retail | 1957 |
| Clarion Hotel Admiral AS | Hospitality | 1996 |
| Classic Design Ans | | 1993 |
| Clay Paky Norway AS | Wholesale & retail | 1993 |
| Cleanera AS | Information & communication | 2021 |
| Clear Ink AS | Health & social care | 2015 |
| CLG Holding AS | | 2020 |
| Clincare AS | Professional & scientific | 2025 |
| Clinic IT AS | Other services | 1998 |
| Clipboard Holding AS | | 2023 |
| CLK Eiendom AS | | 2025 |
| Cloud Unit One AS | Information & communication | 2017 |
| Cloudflex AS | Information & communication | 2018 |
| Clown Music Inc Ans | Arts & recreation | 2003 |
| Club Håkon AS | Hospitality | 2024 |
| Club Paparazzi Da | Hospitality | 1999 |
| Clubinc Da | Arts & recreation | 2009 |
| Clubspons AS | Information & communication | 2025 |
| Clupea II AS | | 2023 |
| CM Enterprise AS | Wholesale & retail | 2022 |
| CM Ventilasjon Bergen AS | Wholesale & retail | 2008 |
| CMG AS | Professional & scientific | 2018 |
| CMG Eiendom AS | Real estate | 2021 |
| CMH Invest AS | Financial services | 2005 |
| CN Design AS | Wholesale & retail | 2008 |