| Caroline Stokkebokjær Hjelseth AS | Professional & scientific | 2015 |
| Carolus AS | Transport & logistics | 2015 |
| Caroma AS | Financial services | 2015 |
| Caron Invest AS | Financial services | 2005 |
| Caror AS | Wholesale & retail | 2021 |
| Carousel AS | Wholesale & retail | 2023 |
| Carpe Diem Afseth AS | Financial services | 2005 |
| Carpe Diem AS | Real estate | 1993 |
| Carpe Diem Consulting AS | Professional & scientific | 2023 |
| Carpe Diem Og Rimas AS | Hospitality | 2022 |
| Carpe Diem Partners AS | Professional & scientific | 2015 |
| Carpe Fortuna AS | Professional & scientific | 2013 |
| Carpe Futurum AS | Information & communication | 2010 |
| Carpenter Investment AS | Financial services | 2009 |
| Carpenters Nuf | Construction | 2007 |
| Carpi Tech CZ Sro | Administrative & support | 2016 |
| Carpus Holding AS | Real estate | 2006 |
| Carrara AS | Real estate | 2026 |
| Carrera AS | Real estate | 2013 |
| Carrera Solution Nuf | Professional & scientific | 2014 |
| Carrhae Capital LLP Nuf | | 2023 |
| Carrie AS | Information & communication | 2021 |
| Carro AS | | 2020 |
| Carro Invest AS | | 2023 |
| Carrot Productions AS | Arts & recreation | 2015 |
| Carry on Invest AS | | 2022 |
| Carspaze Nordic AS | Professional & scientific | 2010 |
| Carst Holding AS | Financial services | 2017 |
| Carstens AI Holding AS | | 2020 |
| Carstop Da | Wholesale & retail | 2019 |
| Cartagena AS | Information & communication | 1992 |
| Cartar Invest AS | | 1984 |
| Cartar Management AS | Professional & scientific | 2003 |
| Cartavio AS | Information & communication | 2019 |
| Cartel's Solli Plass AS | Hospitality | 2021 |
| Cartena AS | Information & communication | 2001 |
| Cartogravie AS | Professional & scientific | 2022 |
| Cartopia AS | Wholesale & retail | 2016 |
| Carucel Alternative Investment AS | | 2025 |
| Carucel AS | Real estate | 2020 |
| Carucel Eiendom AS | Real estate | 2018 |
| Carucel Eiendom Holding AS | Real estate | 2020 |
| Carucel Finance AS | | 2020 |
| Carucel Front Holding AS | | 2020 |
| Carucel Holding AS | | 2025 |
| Carucel Hylle 1 AS | | 2021 |
| Carucel Invest AS | Real estate | 2019 |
| Carucel Investor AS | Real estate | 2017 |
| Carucel Leisure AS | Hospitality | 2022 |
| Carucel Living AS | Real estate | 2022 |
| Carucel Living Holdco AS | Real estate | 2022 |
| Carucel Living II AS | | 2026 |
| Carucel Management AS | Real estate | 2020 |
| Carucel Property AS | Real estate | 2020 |
| Carucel Sentrum Holding AS | Real estate | 2020 |
| Carucel Stella AS | | 2021 |
| Carucel Urban Development AS | Real estate | 2022 |
| Carucel Viken AS | Real estate | 2018 |
| Carup AS | | 2017 |
| Carvasal Film AS | Information & communication | 2020 |
| Carvoeiro Eiendom AS | | 2018 |
| Cary Group Norway AS | Other services | 2021 |
| Carzzin Service AS | Administrative & support | 2025 |
| Cas 1 AS | Information & communication | 2001 |
| Cas Eg AS | Manufacturing | 1997 |
| Cas Holding 2 AS | | 2025 |
| Cas Holding AS | Financial services | 2005 |
| Cas Start Up 8 AS | Real estate | 2022 |
| Casa Albir AS | Real estate | 2019 |
| Casa Anna AS | Real estate | 2007 |
| Casa Aurora Borealis Opplevelser AS | Administrative & support | 2020 |
| Casa Bella Delikatesse AS | Wholesale & retail | 2016 |
| Casa Bella Restaurant AS | Hospitality | 2026 |
| Casa Cabo Roig AS | Real estate | 2012 |
| Casa Canarios AS | Professional & scientific | 2013 |
| Casa Capital AS | Real estate | 2007 |
| Casa Cielo AS | | 2024 |
| Casa Drandi AS | Financial services | 2007 |
| Casa in Alto AS | Real estate | 2017 |
| Casa Invest AS | Financial services | 2005 |
| Casa Ispirazione AS | Real estate | 1987 |
| Casa Lita Invest AS | Real estate | 2010 |
| Casa Marina AS | Administrative & support | 1998 |
| Casa Media AS | Professional & scientific | 2023 |
| Casa Murilo Ans | Arts & recreation | 2010 |
| Casa Namsos AS | Real estate | 2001 |
| Casa Rolund AS | | 2025 |
| Casa Rosa AS | | 2025 |
| Casa Trading Petersson & Thesen Da | Administrative & support | 1988 |
| Casa-Blanca AS | Real estate | 2015 |
| Casaari AS | | 2023 |
| Casalfaz AS | Real estate | 1973 |
| Casall Norge AS | Wholesale & retail | 1991 |
| Casamar AS | Real estate | 2015 |
| Casander AS | Real estate | 2005 |
| Casanegra AS | Hospitality | 2026 |
| Casanor Eiendom AS | Real estate | 1998 |
| Casarat Invest AS | | 2023 |
| Casas Heddy Holding AS | Real estate | 2019 |
| Casas Heddy Norsk AS | Real estate | 1973 |