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( Mark One ) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K 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 ΤΟ KURA ONCOLOGY , INC . ( Exact name of Registrant as specified in its Charter ) Delaware ( State or other jurisdiction of incorporation or organization ) 12730 High Bluff Drive , Suite 400 , San Diego , CA ( Address of principal executive offices ) Commission File Number 001-37620 Title of each Common Stock , par value $ 0.0001 per share Registrant's telephone number , including area code : ( 858 ) 500-8800 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) 61-1547851 ( I.R.S. Employer Identification No. ) 冈 □ - 92130 ( Zip Code ) KURA Securities registered pursuant to 12 ( g ) of the Act : None of each exchange on which registered The 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 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 > 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 , a smaller reporting company or an emerging growth company . See the definition 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 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 . Smaller reporting company Emerging growth company 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 . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . YES □ NO > The aggregate market value of the voting and non - voting of common equity held by non - affiliates of the registrant was approximately $ 877.9 million as of June 30 , 2020 based on the closing price of $ 16.30 as reported on the Nasdaq Global Select Market on such date . Shares of the registrant's common stock held by executive officers , directors , and their affiliates have been excluded from this calculation . This determination of affiliate status is not necessarily a conclusive determination for other purposes . The number of outstanding shares of the registrant's common stock as of February 19 , 2021 was 66,211,215 shares . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's definitive proxy statement to be filed with the Securities and Exchange Commission , or SEC , subsequent to the date hereof pursuant to Regulation 14A in connection with the registrant's 2021 Annual Meeting of Stockholders , are incorporated by reference into Part III of this Annual Report on Form 10 - K . Such proxy statement will be filed with the SEC not later than 120 days after the conclusion of the registrant's fiscal year ended December 31 , 2020 .