Aetna Announces Appearance At 2008 Lehman Brothers Global Healthcare Conference

HARTFORD, Conn., March 12, 2008 — Aetna (NYSE: AET) announced today that Ronald A. Williams, chairman and CEO, is scheduled to make a presentation at the 2008 Lehman Brothers Global Healthcare Conference on March 19, 2008, in Miami, FL.

Aetna’s presentation is scheduled to begin at 3:15 p.m. Eastern time. Investors, analysts and the general public are invited to listen to this presentation over the Internet via Aetna’s Investor Information link at To listen to this presentation live on the Internet, visit Aetna’s web site prior to the presentation to download and install any necessary audio software. A webcast replay will be available via Aetna’s Investor Information link at, beginning approximately two hours after the event, for 14 days.

Anyone listening to the presentations is encouraged to read Aetna’s 2007 Annual Report on Form 10-K, filed with the Securities and Exchange Commission, for a discussion of Aetna’s historical results of operations and financial condition. Information reconciling certain financial and other measures that may be disclosed in the presentation to relevant GAAP measures is available in the Aetna first quarter 2006 and fourth quarter 2007 Financial Supplements, and press release and Guidance Summary dated February 7, 2008, available via the Aetna Investor Information link.

Aetna is one of the nation’s leading diversified health care benefits companies, serving approximately 36.7 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 and disability plans, and medical management capabilities and health care management services for Medicaid plans. Our customers include employer groups, individuals, college students, part-time and hourly workers, health plans, governmental units, government-sponsored plans, labor groups and expatriates.

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