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Table of Contents ( Mark One ) UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 Annual Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 For the fiscal year ended December 31 , 2020 Or Commission File No. 0-23047 Transition Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 For the transition period from to SIGA Technologies , Inc. ( Exact name of registrant as specified in its charter ) Delaware ( State or other jurisdiction of incorporation or organization ) FORM 10 - K 31 East 62nd Street New York , NY ( Address of principal executive offices ) Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class common stock , $ .0001 par value 13-3864870 Registrant's telephone number , including area code : ( 212 ) 672-9100 ( IRS Employer Identification . No. ) SIGA 10065 ( zip code ) Trading Symbol ( s ) Name of each exchange on which registered The Nasdaq Global Market None Securities registered pursuant to Section 12 ( g ) of the Act : Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act Yes No . Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Act Yes No X. Note Checking the box above will not relieve any registrant required to file reports pursuant to Section 13 or 15 ( d ) of the Exchange Act from their obligations under those Sections . Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes > No □ . Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes > No. Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , smaller reporting company or an emerging growth company . See the definitions of “ large accelerated filer , ” “ accelerated filer , ” “ smaller reporting company " and " emerging growth company " in Rule 12b - 2 of the Exchange Act : Large accelerated filer □ Accelerated filer □ Non accelerated filer > Smaller reporting company Emerging growth company If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report .