Annual report
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 FORM 10 - K For the fiscal year ended December 31 , 2020 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Nevada ( State or other jurisdiction of incorporation or organization ) 255 State Street , 9th Floor Boston , MA United States ( Address of principal executive offices ) PIERIS PHARMACEUTICALS , INC . ( Exact name of registrant as specified in its charter ) to Commission file number : 001-37471 Title of each class Common Stock , par value $ 0.001 per share Registrant's telephone number , including area code 857-246-8998 EIN 30-0784346 ( I.R.S. Employer Identification No. ) Securities registered pursuant to Section 12 ( b ) of the Exchange Act : Trading Symbol ( s ) 2109 ( Zip Code ) PIRS Securities registered pursuant to Section 12 ( g ) of the Act : None ( Title of class ) Name of each exchange on which registered The Nasdaq Stock Market LLC Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes No ý Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No ý 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 ý 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 ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes ý No