| Cardspire AS | Arts & recreation | 2024 |
| Cardtech AS | Wholesale & retail | 2002 |
| Care and Create AS | Professional & scientific | 2025 |
| Care Center AS | Transport & logistics | 2004 |
| Care Center Plaza AS | Transport & logistics | 2007 |
| Care of Carl AS | Wholesale & retail | 2023 |
| Care Properties AS | Real estate | 2013 |
| Care Properties Finance AS | Real estate | 2017 |
| Care Safety Innovations AS | Information & communication | 2023 |
| Care-Hub AS | Administrative & support | 2024 |
| Careernet Holdings GmbH | Administrative & support | 2001 |
| Careit Consulting AS | Administrative & support | 2023 |
| Careium Norge AS | Health & social care | 2004 |
| Carelius Nexus AS | Information & communication | 2026 |
| Carenero AS | Manufacturing | 2015 |
| Carenode AS | Information & communication | 2026 |
| Cares Workplace Services AS | Hospitality | 1984 |
| Cargil Invest AS | | 2022 |
| Carglass AS | Other services | 2003 |
| Cargo Linea AS | Transport & logistics | 2001 |
| Cargo Norge AS | Transport & logistics | 2021 |
| Cargoman Transport AS | Transport & logistics | 2020 |
| Cargonet AS | Transport & logistics | 2001 |
| Carhouse AS | Wholesale & retail | 2014 |
| Carida Eiendom AS | Wholesale & retail | 2024 |
| Carida Equity AS | | 2026 |
| Cariguard AS | Wholesale & retail | 2024 |
| Carin AS | Real estate | 2023 |
| Carina Dahl Entertainment AS | Arts & recreation | 2020 |
| Carina Og Kristine AS | Education | 2024 |
| Carinas Bakeri AS | Wholesale & retail | 2023 |
| Carisma Capital AS | Financial services | 2016 |
| Carite Veslemøy Viervoll AS | Wholesale & retail | 1977 |
| Carius AS | Financial services | 1999 |
| Carklo AS | Real estate | 2017 |
| Carl Berner Bilvask & Bilpleie AS | Other services | 2013 |
| Carl Berner Eiendom AS | | 2023 |
| Carl Berner Forretninger AS | Real estate | 1985 |
| Carl Berner Fysikalske Institutt Da | Health & social care | 2000 |
| Carl Berner Helseutleie AS | Real estate | 2020 |
| Carl Berner Kapital AS | | 2020 |
| Carl Berner Legekontor AS | Health & social care | 2023 |
| Carl Berner Legespesialistene AS | Health & social care | 2024 |
| Carl Berner Næring AS | Real estate | 2015 |
| Carl Berner Passasjen AS | Real estate | 2020 |
| Carl Berners Grill AS | Hospitality | 2019 |
| Carl Berners Plass Eiendomsmegling AS | Real estate | 2015 |
| Carl Evensen Eftf AS | Wholesale & retail | 1960 |
| Carl F Hemsen AS | Financial services | 1960 |
| Carl Grøndahls Vei 1 AS | Real estate | 2021 |
| Carl Grøndahls Vei 8 AS | Real estate | 2017 |
| Carl Hansen & Søn Norge AS | Wholesale & retail | 2020 |
| Carl Hed AS | | 2020 |
| Carl Heftye AS | Wholesale & retail | 2013 |
| Carl Heftye Cash & Carry AS | Wholesale & retail | 2015 |
| Carl HQ AS | Information & communication | 2024 |
| Carl Kierulf & Co AS | Real estate | 2006 |
| Carl Kjelsens Vei 21 B AS | Real estate | 2007 |
| Carl Meyer Eiendom AS | Real estate | 2025 |
| Carl Mortensen & Co AS | Wholesale & retail | 1986 |
| Carl Peder Consult AS | Professional & scientific | 1990 |
| Carl Peder Eiendom AS | Real estate | 1993 |
| Carl Sebastian Smedberg Holding AS | Professional & scientific | 2021 |
| Carl Wine AS | Wholesale & retail | 2015 |
| Carla AS | Wholesale & retail | 1993 |
| Carla Invest AS | Real estate | 2016 |
| Carlbergveien 4,6 AS | Real estate | 1995 |
| Carlcon AS | Financial services | 2005 |
| Carlfrankalbert AS | Information & communication | 2018 |
| Carlgustav Solutions AS | Construction | 2012 |
| Carline AS | Wholesale & retail | 2017 |
| Carlings AS | Real estate | 1990 |
| Carlmar Consulting AS | Information & communication | 2025 |
| Carlos Bernardo Cervo Ans | Professional & scientific | 2003 |
| Carlos Capitalos AS | | 2019 |
| Carls AS | Hospitality | 2020 |
| Carlsens Konsepter AS | Arts & recreation | 2014 |
| Carlsson Invest AS | Financial services | 2018 |
| Carlton AS | Professional & scientific | 2021 |
| Carlton Hotel Guldsmeden Oslo AS | Hospitality | 2010 |
| Carma Event AS | Administrative & support | 2012 |
| Carmel Eiendom AS | Real estate | 2016 |
| Carmel Engros AS | Wholesale & retail | 2025 |
| Carmel Grill AS | Hospitality | 1995 |
| Carmelina AS | Wholesale & retail | 2005 |
| Carmencita Nustad AS | Real estate | 2014 |
| Carmonsita AS | | 2021 |
| Carn Capital AS | Financial services | 2015 |
| Carnivore AS | | 2020 |
| Carno AS | | 2026 |
| Carnord Transport AS | Transport & logistics | 2025 |
| Carnot Efficient Energy AS | Professional & scientific | 2016 |
| Caro Bygg 1 AS | Construction | 2025 |
| Caro Bygg AS | Construction | 2017 |
| Carolina Cookers AS | Administrative & support | 2019 |
| Carolinan AS | Real estate | 2005 |
| Caroline Denise Svendsen AS | Other services | 2019 |
| Caroline Holding AS | | 2025 |
| Caroline Lund AS | | 2020 |
| Caroline Nergaard Design AS | Professional & scientific | 2007 |