UNITED STATES 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): October 5, 2004 __________ SIGA Technologies, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 0-23047 13-3864870 -------- ------- ---------- (State or other Jurisdiction of (Commission File (I.R.S. Employer Incorporation or Organization) Number) Identification Number) 420 Lexington Avenue, Suite 601, New York, New York 10170 --------------------------------------------------- ----- (Address of Principal Executive Offices) (Zip Code) (212) 672-9100 -------------- (Registrant's telephone number, including area code) ITEM 7.01. Regulation FD Disclosure. ------------------------ On October 5, 2004, SIGA Technologies, Inc., a Delaware corporation, issued a press release pursuant to which it announced that the Company's lead smallpox compound, SIGA-246, has demonstrated significant antiviral activity against several mouse models of poxvirus disease. A copy of the press release is attached hereto as Exhibit 99.1, which is incorporated in this Item 7.01 by reference. ITEM 9.01 Financial Statements and Exhibits --------------------------------- (c) Exhibits Exhibit No. Description ----------- ----------- 99.1 Press Release dated October 5, 2004. 2 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. SIGA TECHNOLOGIES, INC. By: /s/ Thomas N. Konatich ---------------------------- Thomas N. Konatich Chief Financial Officer Date: October 5, 2004 3 EXHIBIT INDEX ------------- Exhibit Number Description -------------- ----------- 99.1 Press Release dated October 5, 2004. 4