General Mills (GIS) 10-K 2023 FY Annual report

Exhibit 32.1

CERTIFICATIONPURSUANT TO SECTION 906 OF THE SARBANES-OXLEYACT OF

2002

I,JeffreyL.Harmening,ChiefExecutiveOfficerofGeneralMills,Inc.(the“Company”),certify,pursuanttoSection 906ofthe

Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1) theAnnual Reporton Form 10-Kof theCompany forthe fiscalyear endedMay 28,2023 (the“Report”), fullycomplies with

the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of1934 (15 U.S.C. 78m or 78o(d)); and

(2) the informationcontained in theReport fairlypresents, in allmaterial respects,the financialcondition andresults of operations

of the Company.

Date:June 28, 2023

/s/ Jeffrey L. Harmening

Jeffrey L. Harmening

Chief Executive Officer