Bedrift C - Manglerud
- Celina AS
- Cannizzaro AS
- Cheermania AS
- Closing Eyes AS
- Chica Skotique AS
- Christiania Oppmerking AS
- Coloplast Norge AS
- Christoffersen Holding AS
- Christensens Eftf AS Byggmester
- Claire Manglerud Senter
- Cutters Manglerud Senter
- Christen Kristensen Holding AS
- Consensus Eiendom Invest AS
- Checkit Nina Lagesen
- Christian W. Farstad Consulting
- Children Rescue Voluntary Organisation
- Collett Helse- og Legetjeneste
- Content Bård Asbjørn Røsnæs
- Christina Konsulent Tjenester Christina Ørnholt
- C.M Mathisen Bygg & Landskap