Bedrift C - Aurskog
- Cavok AS
- Cathrine Haneborg
- Christer Sveistrup
- Clare Clarke
- Cordis International AS
- Can Ødegård
- Christine Steffarud
- Cicada Music ANS
- Chtl Gruppen AS
- Coach Krogstad AS
- Cavok SA
- Chlu Stein Vaaler
- Comfort Taxi Raza
- Christer Sveistrup Holding AS
- Covent Garden Collection AS
- C-Lys Holding AS
- Coop øst SA
- Christensen E-Sport
- Cineforce Media Martin Stensletten
- Cobweb Research & Consulting Andreas Brekken