Aetna Board Member R. David Yost Resigns

HARTFORD, Conn., June 9, 2004 — Aetna (NYSE: ΑET) announced today that R. David Yost, chief executive officer of AmerisourceBergen Corporation, has resigned from the Aetna Board of Directors.

Yost issued this statement. "I have enjoyed serving on the Aetna Board of Directors during the company’s successful turnaround. However, as AmerisourceBergen is a pharmaceutical services corporation, and Aetna now has its own pharmacy benefit management business, I think that it would be appropriate for me to leave the Aetna Board at this time. I believe in the company’s strategy and wish the company well."

With Yost’s departure, there are 13 Aetna directors.

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