Exhibit 32.1
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO SECTION 906 OF THE
SARBANES-OXLEY ACT OF 2002
In connection with the Quarterly Report on Form 10-Q of WestRock Company (the “Corporation”), for the quarter ended June 30, 2023 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, David B. Sewell, Chief Executive Officer and President of the Corporation, and Alexander W. Pease, Executive Vice President and Chief Financial Officer of the Corporation, each certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
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| /s/ David B. Sewell |
| David B. Sewell |
| Chief Executive Officer and President |
| August 4, 2023 |
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| /s/ Alexander W. Pease |
| Alexander W. Pease |
| Executive Vice President and Chief Financial Officer |
| August 4, 2023 |
