You might say this company knows to stay out of the rough. American Golf Corporation (AGC) is one of the largest golf course management firms in the world with more than 95 public, private, and resort properties. Its portfolio of courses includes such country clubs as The Golf Club at Mansion Ridge (Monroe, New York), Oakhurst Country Club (Clayton, California), and Palm Valley Country Club (Palm Desert, California). The company also runs the American Golf Foundation, which helps promote the game through charity and education. AGC is owned by investment firms Goldman Sachs and Starwood Capital.