Otherwise known as Hospital Corporation of America, HCA is one of the biggest for-profit hospital operators in the United States with 169 hospitals and 115 outpatient centers in 20 states and England. Bain Capital, Kohlberg Kravis Roberts, Merrill Lynch Global Private Equity, HCA founder Dr. Thomas F. Frist, Jr. and HCA management took the company private in 2006.
NEXT: PricewaterhouseCoopers International