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UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , DC 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 Commission File Number : 001-39593 Delaware ( State or other jurisdiction of incorporation or organization ) FORM 10 - K Shattuck Labs , Inc. ( Exact name of registrant as specified in its charter ) Title of each class Common Stock , par value $ 0.0001 per share Large accelerated filer Non - accelerated filer 1018 W. 11th Street , Suite 100 Austin , TX 78703 ( 919 ) 864-2700 ( Address of principal executive offices including zip code ) Former name , former address and former fiscal year , if changed since last report : N / A Securities registered pursuant to Section 12 ( b ) of the Exchange Act : Trading Symbol ( s ) 81-2575858 ( I.R.S. Employer Identification Number ) X STTK Indicate by a check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes No - Indicate by a 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 Name of each exchange on which registered The Nasdaq Global Select Market 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 . 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 . 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 common equity held by non - affiliates of the registrant as of October 14 , 2020 , the closing date of the registrant's initial public offering , was approximately $ 553,524,346 , based on the closing price on The Nasdaq Global Select Market reported for such date . Shares of common stock held by each officer and director and by each person who is known to own 10 % or more of the outstanding common stock have been excluded in that such persons may be deemed to be affiliates of the registrant . This determination of affiliate status is not