UNITED STATES OMB APPROVAL SECURITIES AND EXCHANGE COMMISSION OMB Number: 3235-0060 Washington, D.C. 20549 Expires: May 31, 2000 Estimated average burden hours per response 5.00 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 30, 2002 -------------------------- TRIANGLE PHARMACEUTICALS, INC. -------------------------------------------------------------------------------- (Exact name of registrant as specified in its charter) DELAWARE 000-21589 56-1930728 -------------------------------------------------------------------------------- (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 4 University Place, 4611 University Drive, Durham, North Carolina 27707 -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code (919) 493-5980 ------------------------- -------------------------------------------------------------------------------- (Former name or former address, if changed since last report) Item 5. Other Events and Regulation FD Disclosure. On April 30, 2002, Triangle Pharmaceuticals, Inc. issued a press release, a copy of which is attached hereto as Exhibit 99.1, and is incorporated herein by reference. Item 7. Financial Statements and Exhibits. (c) Exhibits. The following document is incorporated by reference to this Report: 99.1 Press release dated April 30, 2002 SIGNATURES 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. Triangle Pharmaceuticals, Inc. --------------------------------- (Registrant) May 1, 2002 /s/ Robert F. Amundsen, Jr. ------------------------------------- --------------------------------- Date (Signature) Name: Robert F. Amundsen, Jr. Title: Executive Vice President & Chief Financial Officer