SIGA Technologies to Host Business Update Call on May 5th, 2022 Following Release of First Quarter 2022 Financial Results

NEW YORK, April 28, 2022 (GLOBE NEWSWIRE) -- SIGA Technologies, Inc. (SIGA) (NASDAQ: SIGA), a commercial-stage pharmaceutical company, today announced that management will host a webcast and conference call to provide a business update at 4:30 P.M. ET on Thursday, May 5^th, 2022. Participating on the call will be Dr. Phil Gomez, Chief Executive Officer, Daniel Luckshire, Chief Financial Officer, and Dennis Hruby, Chief Scientific Officer.

A live webcast of the call will also be available on the Company's website at www.siga.com under the 'Events & Presentations' tab in the Investor Relations section, or by clicking here. Please log in approximately 5-10 minutes prior to the scheduled start time.

Participants may access the call by dialing 1-855-327-6837 for domestic callers or 1-631-891-4304 for international callers.

A replay of the call will be available for two weeks by dialing 1-844-512-2921 for domestic callers or 1-412-317-6671 for international callers and using Conference ID: 10018746. The archived webcast will be available in the Events and Presentations section of the Company's website.

ABOUT SIGA TECHNOLOGIES, INC. and TPOXX^®

SIGA Technologies, Inc. is a commercial-stage pharmaceutical company focused on the health security market. Health security comprises countermeasures for biological, chemical, radiological and nuclear attacks (biodefense market), vaccines and therapies for emerging infectious diseases, and health preparedness. Our lead product is TPOXX, also known as tecovirimat and ST-246, an orally administered and IV formulation antiviral drug for the treatment of human smallpox disease caused by variola virus. TPOXX is a novel small-molecule drug and the U.S. government maintains a stockpile of TPOXX for treatment of smallpox. Over the past decade, the U.S. government has procured, or has current orders for, approximately $705 million of TPOXX for national preparedness. The oral formulation of TPOXX was approved by the FDA for the treatment of smallpox in 2018. The full label is here: https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=fce826ab-4d6a-4139-a2ee-a304a913a253. In September 2018, SIGA signed a contract potentially worth more than $600 million with BARDA for procurement and development related to both oral and intravenous formulations of TPOXX. The same oral formulation was approved by the EMA in January 2022, and Health Canada in December 2021. For more information about SIGA, please visit www.siga.com.

ABOUT SMALLPOXⁱ

Smallpox is a contagious, disfiguring and often deadly disease that has affected humans for thousands of years. Naturally occurring smallpox was eradicated worldwide by 1980, the result of an unprecedented global immunization campaign. Samples of smallpox virus have been kept for research purposes. This has led to concerns that smallpox could someday be used as a biological warfare agent. A vaccine can prevent smallpox, but the risk of the current vaccine's side effects is too high to justify routine vaccination for people at low risk of exposure to the smallpox virus.

FORWARD-LOOKING STATEMENTS

This press release contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including [statements relating to the progress of SIGA’s development programs and timelines for bringing products to market, as well as the impact of COVID-19 on SIGA’s business]. Forward-looking statements may be identified by words or phrases such as “believes,” “estimates,” “expects,” “may,” “will,” “would,” “can,” “could,” and similar words and phrases. Such forward-looking statements are based on current expectations and assumptions and subject to various known and unknown risks and uncertainties, and SIGA cautions you that any forward-looking information provided by or on behalf of SIGA is not a guarantee of future performance. SIGA’s actual results could differ materially from those anticipated by such forward-looking statements due to a number of factors, some of which are beyond SIGA’s control, including, but not limited to, (i) the risk that the U.S. Biomedical Advanced Research and Development Authority (“BARDA”) elects, in its sole discretion as permitted under the BARDA Contracts (as defined below), not to exercise all, or any, of the remaining unexercised options under those contracts, (ii) the risk that SIGA may not complete performance under its contracts with BARDA (the “BARDA Contracts”) on schedule or in accordance with contractual terms, (iii) the risk that the BARDA Contracts are modified or canceled at the request or requirement of the U.S. government, (iv) the risk that the nascent international biodefense market does not develop to a degree that allows SIGA to successfully market TPOXX internationally, (v) the risk that potential products, including potential alternative uses or formulations of TPOXX that appear promising to SIGA or its collaborators, cannot be shown to be efficacious or safe in subsequent pre-clinical or clinical trials, (vi) the risk that SIGA or its collaborators will not obtain appropriate or necessary governmental approvals to market these or other potential products or uses, (vii) the risk that SIGA may not be able to secure or enforce sufficient legal rights in its products, including intellectual property protection, (viii) the risk that any challenge to SIGA’s patent and other property rights, if adversely determined, could affect SIGA’s business and, even if determined favorably, could be costly, (ix) the risk that regulatory requirements applicable to SIGA’s products may result in the need for further or additional testing or documentation that will delay or prevent SIGA from seeking or obtaining needed approvals to market these products, (x) the risk that the volatile and competitive nature of the biotechnology industry may hamper SIGA’s efforts to develop or market its products, (xi) the risk that changes in domestic or foreign economic and market conditions may affect SIGA’s ability to advance its research or may affect its products adversely, (xii) the effect of federal, state, and foreign regulation, including drug regulation and international trade regulation, on SIGA’s businesses, (xiii) the risk that the COVID-19 pandemic could impact SIGA’s operations by disrupting SIGA’s supply chain for the manufacture of TPOXX, causing delays in SIGA’s research and development activities, causing delays or the re-allocation of funding in connection with SIGA’s government contracts, or diverting the attention of government staff overseeing SIGA’s government contracts, (xiv) the risk that the U.S. or foreign governments’ responses (including inaction) to national or global economic conditions or infectious diseases such as COVID-19 are ineffective and may affect SIGA’s business adversely, and (xv) other risk factors discussed in Item 1A. “Risk Factors” of SIGA’s Annual Report on Form 10-K for the year ended December 31, 2021, and in SIGA’s subsequent filings with the U.S. Securities and Exchange Commission. These documents are publicly available at the SEC’s website at http://www.sec.gov and SIGA’s website at https://investor.siga.com. Forward-looking statements are current only as of the date on which such statements were made, and except as may be otherwise required by law, we undertake no obligation to update publicly any forward-looking statements whether as a result of new information, future events, or otherwise.

The information contained in this press release does not necessarily reflect the position or the policy of the U.S. government and no official endorsement should be inferred. The information contained on the websites referenced herein is not incorporated by reference into this press release.

Investor Contacts:
Laine Yonker, Edison Group
lyonker@edisongroup.com

Michael Crawford, Edison Group
mcrawford@edisongroup.com