United Therapeutics Corporation (UTHR) Chairman and CEO to Ring the NASDAQ Stock Market Opening Bell

MEDIA ADVISORY, June 27, 2006 (PRIMEZONE) --

What: Martine Rothblatt, Ph.D, J.D., M.B.A., Chairman & CEO of United Therapeutics Corporation (UTHR) will preside over the opening bell to celebrate the company's 10 year listing anniversary. Where: NASDAQ MarketSite -- 4 Times Square -- 43rd & Broadway Broadcast Studio When: Wednesday, June 28th, 2006 at 9:30 a.m. EDT Contacts: United Therapeutics Corporation: Andrew Fisher (afisher@unither.com) NASDAQ MarketSite: Stephanie Lowenthal; (646) 441-5220

Feed Information:

The opening bell is available from 9:20 a.m. to 9:35 a.m. on uplink IA-5 C-band/transponder 14. The downlink frequency is 3980 horizontal; audio: 6.2/6.8. The feed can also be found on Waterfront fiber 1623. If you have any questions, please contact Stephanie Lowenthal at (646) 441-5220.

Photos:

To obtain a hi-resolution photograph of the Market Open, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market open of your choice.

About United Therapeutics Corporation (UTHR):

United Therapeutics is a biotechnology company focused on the development and commercialization of unique products for patients with chronic and life-threatening cardiovascular, cancer and infectious diseases.

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