1 SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 -------------- FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 29, 2000 United Therapeutics Corporation -------------------------------------------------- (Exact Name of Registrant as Specified in Charter) Delaware 000-26301 52-1984749 (State or Other (Commission (I.R.S. Employer Jurisdiction of File Number) Identification Incorporation) Number) 1110 Spring Street Silver Spring, MD 20910 - ----------------------------------- -------- (Address of Principal Executive (Zip Offices) Code) Registrant's telephone number, including area code: (301) 608-9292 --------------------- 2 ITEM 5. OTHER EVENTS. On June 29, 2000, the Registrant issued a press release, a copy of which is attached hereto and incorporated herein by this reference. ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS (a) Not applicable. (b) Not applicable. (c) Exhibits Exhibit No. Description ----------- ----------- 99.1 Registrant's press release dated June 29, 2000 3 SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. United Therapeutics Corporation (Registrant) Date: June 29, 2000 By: /s/ Martine A. Rothblatt ---------------------------------- Name: Martine A. Rothblatt Title:Chairman and CEO 4 EXHIBIT INDEX Exhibit No. Description - ----------- ----------- 99.1 Registrant's press release dated June 29, 2000