X0508 4 2024-02-12 0001732845 WestRock Co WRK 0001731484 Lostetter Vicki L 1000 ABERNATHY ROAD NE SUITE 125 ATLANTA GA 30328 0 1 0 0 Chief Human Resources Officer 0 Common Stock 2024-02-12 4 S 0 3500 42.77 D 92117 D The reported price in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $42.76 to $42.78 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. Includes dividend reinvestments not previously reported that are exempt from Section 16. Steph W. Bignon (attorney-in-fact pursuant to power of attorney previously filed with the SEC) 2024-02-13