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): April 12, 2001 United Therapeutics Corporation -------------------------------------------------- (Exact Name of Registrant as Specified in Charter) Delaware 0-26301 52-1984749 --------------- ------- ---------- (State or Other (Commission (I.R.S. Employer Jurisdiction of File Number) Identification Number) Incorporation) 1110 Spring Street Silver Spring, MD 20910 -------------------------------------------------------- ------------- (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code: (301) 608-9292 ----------------------------------- 2 ITEM 5. OTHER EVENTS. On April 12, 2001, the Registrant issued a press release attached hereto as Exhibit 99 and incorporated herein. ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS. Exhibit No. Description of Exhibit ----------- ---------------------- 99 Press release of April 12, 2001 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: April 12, 2001 By: /s/ Martine A. Rothblatt ------------------------------- Name: Martine A. Rothblatt Title: Chief Executive Officer 4 Exhibit Index Exhibit No. Description of Exhibit ----------- ---------------------- 99 Press release of April 12, 2001