X0202 4 2005-08-04 0 0001082554 UNITED THERAPEUTICS CORP UTHR 0001106578 ROTHBLATT MARTINE A 1 1 0 0 CEO Common Stock 2005-08-04 2005-08-04 4 S 0 2000 69.1565 D 421368 D Common Stock 2005-08-05 2005-08-05 4 G 0 50000 0 D 371368 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 205,173 shares held by the reporting person's spouse. On August 5, 2005, the reporting person contributed 50,000 shares of UTHR common stock to a charitable lead unified trust of which the reporting person is not a trustee and does not otherwise have investment control over the securities. Includes 180,173 shares held by the reporting person's spouse. /s/ Paul A. Mahon under Power of Attorney 2005-08-05