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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended May 30 , 2021 0 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from or Delaware ( State or other jurisdiction of incorporation or organization ) 222 W. Merchandise Mart Plaza , Suite 1300 Chicago , Illinois ( Address of principal executive offices ) Title of each class Common Stock , $ 5.00 par value Commission File No. 1-7275 to CONAGRA BRANDS , INC . ( Exact name of registrant as specified in its charter ) 47-0248710 ( I.R.S. Employer Identification No. ) 60654 ( Zip Code ) Registrant's telephone number , including area code ( 312 ) 549-5000 Securities registered pursuant to section 12 ( b ) of the Act : Trading Symbol ( s ) CAG Securities registered pursuant to section 12 ( g ) of the Act : None 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 Section 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 New York Stock Exchange 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 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 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 Act ) . Yes □ No The aggregate market value of the voting common stock of Conagra Brands , Inc. held by non - affiliates on November 27 , 2020 ( the last business day of the Registrant's most recently completed second fiscal quarter ) was approximately $ 17,559,528,469 based upon the closing sale price on the New York Stock Exchange on such date . At June 27 , 2021 , 480,326,127 common shares were outstanding . Documents Incorporated by Reference Portions of the Registrant's definitive Proxy Statement for the Registrant's 2021 Annual Meeting of Stockholders ( the " 2021 Proxy Statement " ) are incorporated by reference into Part III .