Exhibit 32.1
CERTIFICATION PURSUANT TO
18 U.S.C. 1350
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
October 25, 2022
In connection with the Quarterly Report on Form 10-Q by Kaiser Aluminum Corporation, a Delaware corporation (the “Company”), for the quarter ended September 30, 2022 (the “Report”), as filed on the date hereof with the Securities and Exchange Commission, the undersigned, Keith A. Harvey, President and Chief Executive Officer of the Company, does hereby certify, pursuant to 18 U.S.C. 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to such officer’s knowledge:
IN WITNESS WHEREOF, the undersigned has executed this certification as of the date first above written.
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| /s/ Keith A. Harvey |
| Keith A. Harvey |
| President and Chief Executive Officer |
| (Principal Executive Officer) |