- Building Opportunities For Self-Sufficiency
- Calvert Social Investment Foundation
- Camp Looking Glass Inc
- Campaign for Tobacco-Free Kids
- Campus Pride
- Cancer Care Connection Inc
- CancerCare
- Carbonfund.org Foundation
- Catholic Relief Services-USCCB
- Catholics for a Free Choice
- CEC ArtsLink
- Center for Bioethics and Culture
- Center for Global Development