Madison Dearborn Partners is a private equity investment firm that invests in management buyouts and private equity transactions across a variety of industries. It focuses on the sectors of natural resources, chemicals, energy, automotive, building products, food, metals, refining, packaging and forest products, manufacturing, communications, consumer, financial service health care, and pulp and paper. The company invests in companies in partnership with management teams to achieve long-term appreciation in equity value. Madison Dearborn Partners portfolio companies include Great Lakes Dredge & Dock Corporation, Milnot Holding Corporation, Woods Equipment Company, MetroPCS Communications, Reiman Holding Company, Carrols Restaurant Group and Pax Holding Corporation.