Frank M. Clark Joins Aetna Board Of Directors

HARTFORD, Conn., June 29, 2006 — Aetna (NYSE: ΑET) announced today that Frank M. Clark, Chairman and Chief Executive Officer of Commonwealth Edison (ComEd), has been appointed to the company’s Board of Directors, effective immediately. With the addition of Mr. Clark, 60, Aetna’s board increases to 13 members. ComEd is a unit of one of the nation’s largest electric utilities, Chicago-based Exelon Corporation.

"We are pleased to welcome Frank with his significant business experience to Aetna’s Board of Directors," said Aetna Executive Chairman John W. Rowe, M.D. "Frank’s 40-year career at ComEd has been highlighted by a series of increasingly significant contributions in senior posts across the company. I am confident that his broad knowledge base of business and regulatory issues will serve Aetna well."

Aetna President and Chief Executive Officer Ronald A. Williams noted, "Frank’s career has been focused on the customer, which is central to Aetna’s strategy, and I am confident that he will be an invaluable addition to our Board. In addition, his demonstrated commitment to community leadership complements our increasing focus on local market presence."

Prior to his appointment as chairman and chief executive officer of ComEd, which provides electric service delivery to approximately 3.7 million customers throughout northern Illinois, Clark served as president of ComEd and executive vice president and chief of staff of Exelon. Since 1966, he has led a number of business-critical functions ranging from sales and customer service to labor relations and information technology.

Clark is active in community development and the arts, including the establishment of the African-American Legacy Fund, a $3-million endowment in partnership with The Chicago Community Trust; and the DuSable Museum Capital Campaign, a $24-million initiative to the nation’s first museum devoted to African-American arts and culture.

Clark serves as chairman of the board of trustees of the Adler Planetarium and Astronomy Museum and chairman of the board of directors of the Metropolitan Family Services. He is a member of the board of trustees of DePaul University, the Chicago Symphony Orchestra, and The University of Chicago Hospitals & Health System. He is also a member of the boards of several organizations, including Abraham Lincoln Presidential Library Foundation, Illinois Manufacturers Association, United Way of Metropolitan Chicago, Governors State University Foundation, Big Shoulders Fund, and the Illinois Council on Economic Education.

Clark serves on the board of directors for Waste Management, Inc., and Harris Financial Corporation.

Clark received an honorary Doctor of Humane Letters from Governors State University in 2005 and a Doctor of Laws from DePaul University’s College of Law in 2004. Among his numerous awards are the National Humanitarian Award from the National Conference for Community and Justice, and the Rerum Novarum Award, bestowed by St. Joseph’s Seminary of Loyola University. In 2002 he was a recipient of the prestigious HistoryMakers Award, and was ranked among the 50 Most Powerful Black Executives in America by Fortune magazine.

Clark received his bachelor’s and law degrees from DePaul University. He is a member of the Chicago Bar Association.

Aetna is one of the nation’s leading diversified health care benefits companies, serving approximately 28.3 million people with information and resources to help them make better informed decisions about their health care. Aetna offers a broad range of traditional and consumer-directed health insurance products and related services, including medical, pharmacy, dental, behavioral health, group life, long-term care and disability plans, and medical management capabilities. Our customers include employer groups, individuals, college students, part-time and hourly workers, health plans and government-sponsored plans.

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