NEW YORK, May 06, 2008 (BUSINESS WIRE) -- SIGA Technologies, Inc. (NASDAQ: SIGA), a company specializing in the development of pharmaceutical agents to fight biowarfare pathogens, plans to announce its first quarter 2008 results in a press release that will be issued on Monday, May 12, 2008 before the market open. The Company has scheduled a conference call and simultaneous webcast to discuss the results at 10:00 am EDT on Monday, May 12, 2008.

Participants should call 877-591-4949 (United States/Canada) or 719-325-4874 (International) and request the SIGA Technologies call or utilize the confirmation code 4817760. A live broadcast of the earnings conference call will also be available via the Internet at www.SIGA.com. During the call, there will be a question-and-answer session open to analysts and institutional investors. The Company will also take a limited number of questions by email at info@siga.com. The deadline for submitting questions is Thursday, May 8, 2008 at 6:00 pm EDT.

If you are unable to participate, an audio replay of the call will be available beginning two hours after the call and will be available until 11:59 p.m. on Monday, May 19, 2008, by dialing 888-203-1112 (domestic) or 719-457-0820 (international) using replay pass code 4817760. The webcast of the event will also be archived on the Company's website for one week.

About SIGA Technologies, Inc.

SIGA Technologies is applying viral and bacterial genomics and sophisticated computational modeling in the design and development of novel products for the prevention and treatment of serious infectious diseases, with an emphasis on products for biological warfare defense. SIGA believes that it is a leader in the development of pharmaceutical agents to fight potential bio-warfare pathogens. SIGA has antiviral programs targeting smallpox and other Category A pathogens, including arenaviruses (Lassa fever, Junin, Machupo, Guanarito, Sabia, and lymphocytic choriomeningitis), dengue virus, and the filoviruses (Ebola and Marburg). For more information about SIGA, please visit SIGA's Web site at http://www.siga.com/.

Forward-looking Statements

This press release contains or implies certain "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including statements regarding the efficacy of potential products, the timelines for bringing such products to market and the continued development and possible eventual approval of such products. Forward-looking statements are based on management's estimates, assumptions and projections, and are subject to uncertainties, many of which are beyond SIGA's control. Actual results may differ materially from those anticipated in any forward-looking statement. Factors that may cause such differences include the risks that (a) potential products that appear promising to SIGA or its collaborators cannot be shown to be efficacious or safe in subsequent pre-clinical or clinical trials, (b) SIGA or its collaborators will not obtain appropriate or necessary governmental approvals to market these or other potential products, (c) SIGA may not be able to obtain anticipated funding for its development projects or other needed funding, (d) SIGA may not be able to secure funding from anticipated government contracts and grants, (e) SIGA may not be able to secure or enforce sufficient legal rights in its products, including sufficient patent protection for its products and (f) regulatory approval for SIGA's products may require further or additional testing that will delay or prevent approval. More detailed information about SIGA and risk factors that may affect the realization of forward-looking statements, including the forward-looking statements in this press release, is set forth in SIGA's filings with the Securities and Exchange Commission, including SIGA's Annual Report on Form 10-K for the fiscal year ended December 31, 2007, and in other documents that SIGA has filed with the Commission. SIGA urges investors and security holders to read those documents free of charge at the Commission's Web site at http://www.sec.gov. Interested parties may also obtain those documents free of charge from SIGA. Forward-looking statements speak only as to the date they are made, and, except for any obligation under the U.S. federal securities laws, SIGA undertakes no obligation to publicly update any forward-looking statement as a result of new information, future events or otherwise.

SOURCE: SIGA Technologies, Inc.

KCSA Strategic Communications
Todd Fromer / Marybeth Csaby / David Burke
212-896-1215 / 1236 / 1258
Tfromer@kcsa.com / mcsaby@kcsa.com / dburke@kcsa.com

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