| Chosen AS | Kristiansand S | 2017 |
| Chosen Holding AS | Kristiansand S | 2022 |
| Chou Chou AS | Sandefjord | 2016 |
| CHR Baardsen & Søn AS | Haugesund | 2003 |
| CHR Farup AS | Eiksmarka | 1964 |
| CHR. Holtermann AS | Oslo | 2019 |
| Chrico Invest AS | Elverum | 2005 |
| Chrilabear AS | Oslo | 2023 |
| Chrimont AS | Oslo | 1993 |
| Chris AS | Førde | 1982 |
| Chris Hammerkvist AS | Larvik | 2008 |
| Chris Holding AS | Ålesund | 2005 |
| Chris Maud Da | Paradis | 2009 |
| Chris Midtun Import AS | Oslo | 2023 |
| Chris Moa Syd AS | Ålesund | 1990 |
| Chrisander Brudesalong Da | Sandefjord | 1999 |
| Chrisco Invest AS | Jar | 1997 |
| Chrisco Sport AS | Eiksmarka | 2015 |
| Chriscornelli AS | Kragerø | 2020 |
| Chrismess AS | Gjøvik | 2018 |
| Christ AS | Levanger | 2020 |
| Christ Engebretsen & Søn AS | Oslo | 1991 |
| Christel AS | Førde | 1986 |
| Christen Øygard Gull/Sølv AS | Nærbø | 2005 |
| Christensen AS Bakeri Og Konditori | Gressvik | 1970 |
| Christensen Bakeri Eiendom AS | Gressvik | 2013 |
| Christer Røiseland AS | Holum | 2009 |
| Christer Vambeseth AS | Bjørnemyr | 2015 |
| Christeyns B.V. | 2153Ph Nieuw-Vennep | 2025 |
| Christeyns Norge AS | Mysen | 2014 |
| Christhom AS | Kristiansand S | 2007 |
| Christian Aasbø AS | Sundebru | 2014 |
| Christian Andre AS | Oslo | 1994 |
| Christian Berner AS | Oslo | 1910 |
| Christian Hartz AS | Hamar | 2023 |
| Christian Haugland AS | Ostereidet | 2015 |
| Christian Louboutin Suisse Nuf | Ch-1202 Geneve | 2024 |
| Christian Rokseth Holding AS | Hafrsfjord | 2013 |
| Christiane Brudesalong AS | Rykkinn | 1998 |
| Christiania Belysning AS | Lysaker | 1989 |
| Christiania Deco AS | Porsgrunn | 2006 |
| Christiania Kaffepartner AS | Oslo | 2015 |
| Christiania Kunsthandel Og Malerirestaurering Da | Oslo | 1990 |
| Christiania Møbeltapetser- Og Skumplastforretning AS | Oslo | 2012 |
| Christiania Sport AS | Oslo | 2026 |
| Christiania Sport AS | Oslo | 2001 |
| Christiania Vedforretning AS | Oslo | 2022 |
| Christians Interiors AS | Oslo | 1996 |
| Christianslund Blomster AS | Fredrikstad | 2024 |
| Christianssand Servicestasjon AS | Søgne | 2015 |
| Christie Holding AS | Fana | 1994 |
| Christin Dagligvare AS | Lørenskog | 2024 |
| Christina J. Klingenberg AS | Kvinesdal | 2021 |
| Christina Jacobsen AS | Drammen | 2012 |
| Christina Modell AS | Haugesund | 1963 |
| Christina Sandberg AS | Askim | 2020 |
| Christina's AS | Gressvik | 2007 |
| Christine G. AS | Grimstad | 2005 |
| Christins AS | Kleppe | 1998 |
| Christmas Art and Decoration Da | Oslo | 2004 |
| Christoffer Breivik AS | Tana | 2012 |
| Christoffer Martinsen Holding II AS | Oslo | 2021 |
| Christom AS | Tromsdalen | 2005 |
| Christophersen Sandnes AS | Sandnes | 1982 |
| Christophersen Ur & Gull AS | Trondheim | 2012 |
| Chrisvic Norway AS | Os | 2025 |
| Chrom AS | Sandefjord | 1984 |
| Chromafora AB | Se-126 30 Hägersten | 2026 |
| Chromafora Denmark Aps | Dk-4200 Slagelse | 2026 |
| Chrona AS | Mogreina | 2026 |
| Chronimo Invest AS | Drammen | 2017 |
| Chrono Urmaker & Foto AS | Hønefoss | 1989 |
| Chronos Technology Limited Nuf | Gl17 9Pd Lydbrook, Gloucestershire | 2025 |
| Chrysopidae AS | Oslo | 2016 |
| CHS Invest AS | Tistedal | 2021 |
| Chsnor Sales AS | Moelv | 2018 |
| Chuaicham Invest AS | Sandnessjøen | 2023 |
| Churcheim Brewing SA | Oslo | 2023 |
| CHW Holding AS | Rena | 2023 |
| Château Privé AS | Saupstad | 2024 |
| Chérie Brud AS | Ålesund | 2022 |
| Cial AS | Skien | 2009 |
| Ciass AS | Lommedalen | 2025 |
| Cibumic | Dk-6400 Sønderborg | 2022 |
| Cibus Maris Norway AS | Sandnessjøen | 2019 |
| Cicada Music Ans | Aurskog | 1988 |
| Cicada Norge AS | Trondheim | 2010 |
| Ciccio AS | Oslo | 2020 |
| Cicelia AS | Støren | 2000 |
| Cicelia Holding AS | Støren | 2005 |
| Ciclo AS | Oslo | 2024 |
| Cid Mat AS | Sander | 2018 |
| Cidan Machinery Sweden AB | Se-533 30 Götene | 2024 |
| Cider Time AS | Bryne | 2014 |
| Ciel Beauty AS | Surnadal | 2019 |
| Cielo Bergen AS | Bergen | 2006 |
| Ciena Communications Inc | Us 21076-1426 Hanover Md | 2010 |
| Cigill AS | Ulefoss | 2011 |
| Cila Solution AS | Kopervik | 2015 |
| Cila Velvet AS | Heggedal | 2009 |