- CoreCare
- Corizon Health
- Cornell University
- Cornerstone Care Option
- Cornerstone Healthcare
- Cornerstone Nursing and Rehab Center
- Correlation Ventures
- Cottonwood Healthcare
- Country Villa Wilshire
- Courage Kenny Rehabilitation Institute
- Covenant Care
- Covenant Health
- Covenant Living Communities
- Covenant Living Communities and Services
- Covenant Retirement Communities
- COVID-19 Prevention Network
- Covington Care and Rehabilitation
- Cowart Dizzia LLP
- Cowles Research Group
- Crain’s Chicago Business


