X0202 4 2004-10-07 0 0001082554 UNITED THERAPEUTICS CORP UTHR 0001106578 ROTHBLATT MARTINE A 1 1 0 0 CEO Common Stock 2004-10-07 2004-10-07 4 S 0 2000 33.55 D 561368 D This sale of 2,000 shares is pursuant to the 10b5-1 Plan adopted by the reporting person's spouse on March 12, 2004. The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or any other purpose. Includes 245,173 shares held by the reporting person's spouse. /s/ Paul A. Mahon under Power of Attorney 2004-10-07