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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 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to FORM 10 - K Large accelerated filer Non - accelerated filer Delaware ( State or other jurisdiction of incorporation or organization ) Commission file number 001-38935 ATRECA , INC . ( Exact name of registrant as specified in its charter ) OX 450 East Jamie Court South San Francisco , CA 94080 ( Address of principal executive offices ) ( Zip Code ) ( 650 ) -595-2595 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) BCEL Title of each class Class A Common Stock Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes 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 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 27-3723255 ( I.R.S. Employer Identification No. ) Indicate by check mark whether the registrant has submitted electr every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T 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 . Name of each exchange on which registered The Nasdaq Global Select Market No No Accelerated filer Smaller reporting company Emerging growth company □ X X 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 is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes □ No × . 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 . The aggregate market value of the voting and non - voting common equity held by non - affiliates of the registrant , based on the closing price of the registrant's shares of Class A common stock as reported by The Nasdaq Select Global Market on June 30 , 2020 ( the last business day the registrant's second fiscal quarter ) , was approximately $ 304.6 million . Shares of Class A common stock and Class B common stock held by each executive officer and director and stockholders known by the registrant to own 10 % or more of the outstanding stock based on public filings and other information known to the registrant have been excluded since such persons may be deemed affiliates . This determination of affiliate status is not necessarily a conclusive determination for other purposes . As of February 26 , 2021 , the registrant had 30,115,715 shares of Class A common stock , $ 0.0001 par value per share and 6,715,441 shares of Class B common stock , $ 0.0001 par value per share , outstanding . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's definitive proxy statement relating to its 2021 annual meeting of shareholders , or the 2021 Proxy Statement are incorporated by reference into Part III of this Annual Report on Form 10 - K where indicated . The 2021 Proxy Statement will be filed with the U.S. Securities and Exchange Commission not later than 120 days after the end of the registrant's fiscal year ended December 31 , 2020 .