| Carlsebakken Parkering AS | Drøbak | 2015 |
| Carlssons TRP I Ljungaverk AB | Østby | 2004 |
| Carnord Transport AS | Oslo | 2025 |
| Caroline Karolina Karczmarczyk | Pl-83-200 Starogard Gdanski | 2023 |
| Carolus AS | Oslo | 2015 |
| Caroyal Group AS | Tromsø | 2023 |
| Carro Sia | Halden | 2020 |
| Carrot Holding AS | Leksvik | 2020 |
| Carshare AS | Finnøy | 2017 |
| Case Transport AS | Varaldsøy | 2015 |
| Casita Invest AS | Tromsdalen | 2023 |
| Casper Holding AS | Lillestrøm | 2023 |
| Caster Norge AS | Oslo | 2022 |
| Castravet Kran & Transport AS | Fjellhamar | 2026 |
| Catincho AS | Oslo | 2015 |
| Cato Larsen Transport AS | Hauglandshella | 2007 |
| Cato Rekanes Transport AS | Hørte | 2014 |
| Cavalero Da | Oslo | 2000 |
| Cbi-Mmeer R2 Ltd. Nuf | Sandnes | 2020 |
| Cblc Holding AS | Bergen | 1992 |
| Cbo Endeavour AS | Kristiansand S | 2013 |
| Cbo NW1 AS | Kristiansand S | 2020 |
| Cbo NW2 AS | Kristiansand S | 2020 |
| Cbo NW3 AS | Kristiansand S | 2021 |
| Cbo NW4 AS | Kristiansand S | 2021 |
| Cbo NW5 AS | Kristiansand S | 2021 |
| Cbo NW6 AS | Kristiansand S | 2021 |
| Cbo NW7 AS | Kristiansand S | 2021 |
| Cbo NW8 AS | Kristiansand S | 2021 |
| Cbo Shipholding AS | Kristiansand S | 2013 |
| Cbo Supporter AS | Kristiansand S | 2019 |
| Cbot AS | Nordkisa | 2014 |
| CC Norway AS | Kristiansund N | 2015 |
| CC Tanktransport AS | Ålesund | 2020 |
| CCB AS | Ågotnes | 1998 |
| CCB Holding AS | Ågotnes | 2019 |
| CCB Mongstad AS | Mongstad | 1991 |
| Ce Ma Trans Ans | Oslo | 1988 |
| Ceci Lie Holding AS | Oslo | 2017 |
| Cedar Car Carrier AS | Oslo | 2014 |
| Cedras Taxi AS | Oslo | 2022 |
| Cem Bulk Management AS | Haugesund | 1995 |
| Cemaro AS | Trondheim | 2018 |
| Cenbry Holding AS | Kristiansund N | 2024 |
| Central Park Ans | Stavanger | 2009 |
| Centralen Da | Bryne | 2004 |
| Centrum Taxi AS | Oslo | 2021 |
| Centurion Shipping AS | Straumsgrend | 2008 |
| Centurion Shipping Trading AS | Straumsgrend | 2011 |
| Cesam Rederi AS | Krokkleiva | 2011 |
| Cetra Invest AS | Ålesund | 1990 |
| Ceva Air & Ocean Norway AS | Oslo | 2012 |
| CF Transport AS | Vikersund | 2017 |
| CG Transport Service AS | Skedsmokorset | 2026 |
| CGS Holding AS | Oslo | 2003 |
| CGS I Årjäng AB | Se-672 91 Årjäng | 2025 |
| Champion Chemical AS | Paradis | 2024 |
| Champion Chemical Eight AS | Paradis | 2026 |
| Champion Chemical Five AS | Paradis | 2024 |
| Champion Chemical Four AS | Paradis | 2024 |
| Champion Chemical Holding AS | Paradis | 2024 |
| Champion Chemical One AS | Paradis | 2024 |
| Champion Chemical Seven AS | Paradis | 2026 |
| Champion Chemical Six AS | Paradis | 2024 |
| Champion Chemical Three AS | Paradis | 2024 |
| Champion Chemical Two AS | Paradis | 2024 |
| Champion Endurance AS | Paradis | 2019 |
| Champion Eps Pool AS | Paradis | 2026 |
| Champion Pool AS | Paradis | 2025 |
| Champion Shipping AS | Paradis | 1993 |
| Champion Tankers and Partners AS | Paradis | 2025 |
| Champion Tankers AS | Paradis | 1999 |
| Champion Timur AS | Paradis | 2018 |
| Chapman Freeborn Airchartering Limited | Rh6 0Pa West Sussex | 2016 |
| Charmi AS | Tana | 2025 |
| Charter Cruise AS | Vangsnes | 1988 |
| Charter I Nord AS | Røsvik | 2015 |
| Charterbuss.No AS | Nannestad | 2024 |
| Charvest AS | Leinøy | 2017 |
| Chase Holding AS | Rjukan | 2023 |
| CHC Helikopter Service AS | Sola | 1995 |
| CHC Norway Acquisition Co AS | Sola | 2007 |
| Chem Anchor Invest Ix AS | Bergen | 2022 |
| Chem Anchor Invest Vii AS | Bergen | 2022 |
| Chem Anchor Invest Viii AS | Bergen | 2022 |
| Chem Anchor Invest X AS | Bergen | 2022 |
| Chem Anchor Invest Xi AS | Bergen | 2023 |
| Chem Anchor Invest Xii AS | Bergen | 2023 |
| Chem Anchor Invest Xiii AS | Bergen | 2024 |
| Chem Tank Invest Ix AS | Bergen | 2022 |
| Chem Tank Invest Vii AS | Bergen | 2022 |
| Chem Tank Invest Viii AS | Bergen | 2022 |
| Chem Tank Invest X AS | Bergen | 2022 |
| Chem Tank Invest Xi AS | Bergen | 2023 |
| Chem Tank Invest Xii AS | Bergen | 2023 |
| Chem Tank Invest Xiii AS | Bergen | 2024 |
| Chem Tank Shipping Ix AS | Bergen | 2022 |
| Chem Tank Shipping Vii AS | Bergen | 2022 |
| Chem Tank Shipping Viii AS | Bergen | 2022 |
| Chem Tank Shipping X AS | Bergen | 2022 |