John D. and Catherine T. MacArthur Foundation

The John D. and Catherine T. MacArthur Foundation is the 10th largest private foundation in the United States. Based in Chicago, the Foundation supports non-profit organizations in approximately 50 countries. MacArthur has awarded more than US$5.5 billion since its inception in 1970. With an endowment of $6.50 billion, the foundation provides approximately $225 million annually in grants.