Exhibit 99.1 SIGA Reports Financial Results for Three Months Ended March 31, 2024 • Generated Product Sales of $24 Million and Pre-tax Operating Income of$11 Million • Corporate Update Conference Call Today at 4:30 PM ET NEW YORK, May 7, 2024 -- SIGA Technologies, Inc. (SIGA) (NASDAQ: SIGA), a commercial-stage pharmaceutical company, today reported financial results for the three months ended March 31, 2024. “SIGA delivered strong results in the first quarter, with product revenues of $24 million and pre-t ...