Bedrift C - Helsfyr
- Christensen
- Clara AS
- Commaxx AS
- Concreto AS
- Cameralla AS
- Cleanzone
- Control Plus AS
- Cloud Controller AS
- Cathrin Prana
- Chantelle SA
- Christian Dugstad
- Correzione Forvaltning AS
- Cloud Central AS
- Christiania Eiendomssenter AS
- Caspari Aps
- Cameralla Photo AS
- Christensen Simon
- Cabonline Norge AS
- Cue Agency AS
- Correzione Forvaltning AS
- Control Plus AS
- Cycleurope Norge AS
- CopyCat Helsfyr
- Cloud Controller AS
- Christine S. Rosendahl
- Clinical Innovation Norge
- Clarksons Platou Drift AS
- Cryo Pur Norge AS
- Clinical Innovation Norge
- Columbia Sportswear Norway AS
- Core Technology Oslo AS
- Carpe Diem Singelreiser
- Construction City Bygg AS
- Children Worldwide Fashion
- Continental Dekk Norge AS
- Caroline Andersen Lytskjold
- Columbia Sportswear International Sarl
- Cgi Norge Avd. Oslo-Helsfyr
- Cgi Norge AS Avd Innspurten 1a
- Continental Dekk Norge AS Salgsavd Oslo/Hovedkontor
- Compass Group Norge AS Avd 3285 Helsfyr Panorama
- Compass Group Norge AS Avd 3388 Entra Strømsveien
- Compass Group Norge AS Avd 3387 Entra Grenseveien
- City Self Storage - Rom for Alt Helsfyr