| Caflo Nordic Group AS | | 2019 |
| Caflo Salmon AS | Manufacturing | 2020 |
| Caflo Securities AS | Wholesale & retail | 2019 |
| Cafran AS | Financial services | 2005 |
| Cafri AS | Arts & recreation | 1990 |
| Cafu Capital AS | | 2022 |
| Café Grensen AS | Hospitality | 2024 |
| Café Passabel AS | Hospitality | 2021 |
| Café Sol AS | Hospitality | 2025 |
| Café Superstar Recordings Da | Information & communication | 2007 |
| Cag 25 AS | Information & communication | 2012 |
| Cag Ateles AS | Information & communication | 2012 |
| Cag Syntell AS | Professional & scientific | 2018 |
| Cage Invest AS | Financial services | 2016 |
| Cageball Nydalen AS | Arts & recreation | 2008 |
| Cageeye AS | Information & communication | 2013 |
| Caglar Holding AS | Wholesale & retail | 2020 |
| Cagr Holding AS | | 2022 |
| Cagro AS | Real estate | 2005 |
| Cah Holding AS | Financial services | 2005 |
| Caha Invest AS | | 2021 |
| Cahema AS | | 2025 |
| Cahera Eiendom AS | Real estate | 2014 |
| Cahero Invest AS | | 2026 |
| Cahlia AS | | 2021 |
| Cahoos Invest AS | | 2025 |
| Cahpital AS | | 2023 |
| Cai Kjøkken AS | Administrative & support | 2020 |
| Cai Sjømat AS | Wholesale & retail | 2021 |
| Caiax Interiør Design AS | Professional & scientific | 2014 |
| Caije Invest AS | | 2023 |
| Cairn Consulting AS | Professional & scientific | 2018 |
| Cairn Guides AS | Information & communication | 2026 |
| Cairn Ventures AS | Professional & scientific | 2019 |
| Caisibo AS | Information & communication | 2025 |
| Cajo AS | | 2024 |
| Cajo Invest AS | Financial services | 2017 |
| Cak AS | | 2015 |
| Cak Holding 1 AS | | 2021 |
| Cakao AS | Information & communication | 2023 |
| Cakebox Nordic AS | Information & communication | 2018 |
| Cakefish AS | Information & communication | 2017 |
| Cakelaboslo AS | Wholesale & retail | 2023 |
| Cala Invest AS | | 1981 |
| Cala Mijas Holding AS | Real estate | 2012 |
| Cala Teknologi AS | Information & communication | 2026 |
| Calacatta Capital AS | | 2023 |
| Calacuro AS | | 2022 |
| Caladan AS | Real estate | 2013 |
| Caladh Holding AS | | 2023 |
| Calama AS | Financial services | 1998 |
| Calamar AS | Real estate | 1997 |
| Calamera G. AS | | 2024 |
| Calas Eiendom AS | Real estate | 1996 |
| Calax AS | Professional & scientific | 1992 |
| Calbian Holding AS | Wholesale & retail | 2005 |
| Calbor AS | Real estate | 2014 |
| Calci AS | | 2020 |
| Calculare AS | Professional & scientific | 2010 |
| Calculus Holdco AS | Information & communication | 2024 |
| Calculus Newco AS | Information & communication | 2024 |
| Caledonia Supply AS | | 2025 |
| Cali AS | Professional & scientific | 2019 |
| Caliber Holding AS | Real estate | 2016 |
| Calibr AS | Professional & scientific | 2017 |
| Calico AS | Real estate | 2021 |
| Calidream Invest AS | Professional & scientific | 2013 |
| California District AS | Other services | 2023 |
| California House AS | Wholesale & retail | 2014 |
| Californie Bellevue AS | Real estate | 2010 |
| Calila Holding AS | Financial services | 2005 |
| Calima Frisør AS | Other services | 1989 |
| Calinka AS | Real estate | 1997 |
| Calisto AS | Wholesale & retail | 2013 |
| Call.Com AS | Information & communication | 2020 |
| Callabee Film AS | Information & communication | 2004 |
| Calle AS | Financial services | 1990 |
| Calle Dyvi Holding AS | | 2025 |
| Calle Holding AS | Financial services | 2005 |
| Calleoda AS | | 2025 |
| Callidity AS | Financial services | 2015 |
| Callidus Invest AS | Wholesale & retail | 1998 |
| Calluna Pharma AS | Professional & scientific | 2023 |
| Calluna Pharma Poolco AS | | 2023 |
| Calm Capital AS | | 2026 |
| Calm Energy AS | | 2026 |
| Calm Invest AS | | 2025 |
| Calmeyer Utvikling AS | Real estate | 2025 |
| Calmeyers Gate 15A AS | Real estate | 2025 |
| Calmeyers Gate 15B AS | Real estate | 2025 |
| Calmeyers Gate 5 AS | Real estate | 2024 |
| Calmeyersgate 11 Holding AS | Real estate | 2023 |
| Calmeyersgate 11 Næring AS | Real estate | 2023 |
| Calmeyersgate 9 Holding AS | Real estate | 2023 |
| Calmeyersgate 9 Næring 1 AS | Real estate | 2023 |
| Calmocean AS | Professional & scientific | 2022 |
| Calner Holding AS | | 2026 |
| Calobra AS | Financial services | 2017 |
| Caloma Capital AS | | 2024 |
| Calor AS | Professional & scientific | 2018 |