NEW YORK, Dec. 14, 2009 (GLOBE NEWSWIRE) -- SIGA Technologies, Inc. (Nasdaq:SIGA), a company specializing in the development of pharmaceutical agents to fight biowarfare pathogens, today announced the closing of its offering of 2,725,339 shares of common stock to a select group of institutional investors at a price of $7.35 per common share. Net proceeds to the company after deducting the placement agent's fees and estimated offering expenses are approximately $18.6 million. As previously disclosed, SIGA plans to use the net proceeds from the sale of the shares for general corporate purposes, including development of the Company's product candidates, the acquisition or in-license of technologies, products or businesses, working capital and capital expenditures.