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|Frank M. Clark|
Former Chairman and Chief Executive Officer
Director of Aetna since 2006
Frank M. Clark retired in February 2012 as the Chairman and Chief Executive Officer of Commonwealth Edison Company (“ComEd”) (an electric energy distribution subsidiary of Exelon Corporation), having served in this position since November 2005. Mr. Clark served as President of ComEd from October 2001 to 2005 and served as Executive Vice President and Chief of Staff to the Exelon Corporation Chairman from 2004 to 2005. After joining ComEd in 1966, Mr. Clark held key leadership positions in operational and policy-related responsibilities, including regulatory and governmental affairs, customer service operations, marketing and sales, information technology, human resources and labor relations, and distribution support services. Mr. Clark is non-executive chairman of BMO Financial Corporation (financial services) and a director of Waste Management, Inc. (waste disposal services).