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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 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 to Delaware ( State or other jurisdiction of incorporation or organization ) 780 Memorial Drive FORM 10 - K JOUNCE THERAPEUTICS , INC . ( Exact name of registrant as specified in its charter ) Cambridge , Massachusetts ( Address of principal executive offices ) Title of each class Common Stock , $ 0.001 par value per share Commission File Number 001-37998 Registrant's telephone number , including area code : ( 857 ) 259-3840 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) . ☐ 0 JNCE Securities registered pursuant to Section 12 ( g ) of the Act : None 45-4870634 ( I.R.S. Employer Identification No. ) 02139 ( Zip Code ) Name of each exchange on which registered Nasdaq Global Select Market Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes No x 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 x 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 x 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 x No ™ Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a 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 Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes No 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 . As of June 30 , 2020 , the last business day of the registrant's most recently completed second fiscal quarter , the aggregate market value of the registrant's Common Stock held by non affiliates of the registrant was approximately $ 117,863,213 , based upon the closing price of the registrant's Common Stock on June 30 , 2020 . As of February 19 , 2021 , there were 45,393,561 shares of common stock , $ 0.001 par value per share , outstanding . Documents Incorporated by Reference Portions of the registrant's Definitive Proxy Statement on Schedule 14A relating to its 2021 Annual Meeting of Stockholders to be filed within 120 days of the end of the registrant's fiscal year ended December 31 , 2020 are incorporated by reference into Part III of this Annual Report on Form 10 - K to the extent stated herein .