| Carpe Diem Bergen AS | Other services | 2006 |
| Carpenter & Paterson Norway AS | Wholesale & retail | 2020 |
| Carrot AS | Information & communication | 2017 |
| Carte Blanche AS | Arts & recreation | 1990 |
| Cartel's Neumannsgate AS | Hospitality | 2003 |
| Carthea AS | Professional & scientific | 2007 |
| Casavi AS | Financial services | 2005 |
| Caschna AS | Financial services | 2005 |
| Cashnor 1 AS | Other services | 2019 |
| Casi AS | Information & communication | 2022 |
| Casi Crew AS | | 2025 |
| Casi Group AS | | 2024 |
| Casio Keisanki Kabushiki Kaisha | Information & communication | 2001 |
| Caspar Forlag AS | Information & communication | 1989 |
| Castanea AS | Real estate | 2005 |
| Catalina Spas Vest Ans | Wholesale & retail | 1998 |
| Catch Certificate SA | Administrative & support | 2009 |
| Catching Technology AS | Professional & scientific | 2005 |
| Catena Media AS | Real estate | 2012 |
| Cathrine Jonsson Heggebø AS | Wholesale & retail | 2021 |
| Cathrine Meyer Amundsen AS | Health & social care | 2020 |
| Cavalli AS | Real estate | 2020 |
| Cave Lynx AS | Real estate | 2011 |
| Cavéli Studio AS | Wholesale & retail | 2025 |
| Cawn Invest AS | | 2025 |
| Cban Vestland Invest AS | | 2025 |
| Cblc Holding AS | Transport & logistics | 1992 |
| CBV2 AS | Hospitality | 2019 |
| Cbyh AS | | 2025 |
| CCP Holding AS | Professional & scientific | 2016 |
| Ccrl AS | Professional & scientific | 2007 |
| CCT Group AS | Administrative & support | 2011 |
| CCT Norge AS | Information & communication | 2008 |
| Cece Invest AS | Professional & scientific | 1998 |
| Cee Holding AS | | 2019 |
| Cei AS | | 2026 |
| Celice AS | Administrative & support | 2007 |
| Cenmirari AS | Education | 2023 |
| Census AS | Professional & scientific | 2021 |
| Centi AS | Real estate | 2007 |
| Centipede AS | Information & communication | 2008 |
| Centrum Hudpleie Klinikk AS | Other services | 2000 |
| Centrum Mudo Sport Da | Wholesale & retail | 1996 |
| Centrum Smoke Shop AS | Wholesale & retail | 2019 |
| Centurion Capital AS | | 2022 |
| Centurion Eiendom AS | | 2023 |
| Ceo Invest AS | | 2021 |
| Cerejeira Fontes Aarsland Arkitektur AS | Professional & scientific | 2019 |
| Ceres Invest AS | Financial services | 2005 |
| Cernova AS | Manufacturing | 1990 |
| Cernova Industri AS | Wholesale & retail | 2005 |
| Cernova Trading AS | Wholesale & retail | 2013 |
| Certego AS | Wholesale & retail | 1996 |
| Certus AS | | 2011 |
| Cesar Invest AS | Real estate | 2003 |
| Ceti Invest AS | Financial services | 2013 |
| Cev Flåm AS | Real estate | 2008 |
| Ceylon Capital AS | | 2021 |
| CFT Solutions B.V. Nuf | Professional & scientific | 2024 |
| CH Grindheim Holding AS | | 2021 |
| Ch-Invest AS | | 2005 |
| CH. Todt Holding AS | | 2022 |
| Champion Driver AS | Information & communication | 2025 |
| Chancery Financial Services Pty Ltd | Real estate | 2017 |
| Chaos Crypto AS | | 2021 |
| Chapter 26 AS | Information & communication | 2026 |
| Chapters AS | Real estate | 2007 |
| CHARGE365 AS | Energy | 2014 |
| Chargitect AS | Information & communication | 2023 |
| Charmante AS | Hospitality | 2022 |
| Chartdawn AS | Information & communication | 2015 |
| Chbj Holding AS | Manufacturing | 2022 |
| Chem Anchor Invest Ix AS | Transport & logistics | 2022 |
| Chem Anchor Invest Vii AS | Transport & logistics | 2022 |
| Chem Anchor Invest Viii AS | Transport & logistics | 2022 |
| Chem Anchor Invest X AS | Transport & logistics | 2022 |
| Chem Anchor Invest Xi AS | Transport & logistics | 2023 |
| Chem Anchor Invest Xii AS | Transport & logistics | 2023 |
| Chem Anchor Invest Xiii AS | Transport & logistics | 2024 |
| Chem Tank Invest Ix AS | Transport & logistics | 2022 |
| Chem Tank Invest Vii AS | Transport & logistics | 2022 |
| Chem Tank Invest Viii AS | Transport & logistics | 2022 |
| Chem Tank Invest X AS | Transport & logistics | 2022 |
| Chem Tank Invest Xi AS | Transport & logistics | 2023 |
| Chem Tank Invest Xii AS | Transport & logistics | 2023 |
| Chem Tank Invest Xiii AS | Transport & logistics | 2024 |
| Chem Tank Invest Xiv AS | | 2025 |
| Chem Tank Shipping Ix AS | Transport & logistics | 2022 |
| Chem Tank Shipping Vii AS | Transport & logistics | 2022 |
| Chem Tank Shipping Viii AS | Transport & logistics | 2022 |
| Chem Tank Shipping X AS | Transport & logistics | 2022 |
| Chem Tank Shipping Xi AS | Transport & logistics | 2023 |
| Chem Tank Shipping Xii AS | Transport & logistics | 2023 |
| Chem Tank Shipping Xiii AS | Transport & logistics | 2024 |
| Chem Tank Shipping Xiv AS | | 2025 |
| Chemmarket AS | Wholesale & retail | 2023 |
| Cheranto Da | | 1989 |
| Chica Bergen AS | Other services | 2003 |
| Chicastore Klinikk AS | Other services | 2019 |
| Chik AS | Other services | 2013 |